On 16 Jan 2018, at 08:48, Carl Hoefs <newsli...@autonomy.caltech.edu> wrote:
> Yes, the server is available on the internet, 24/7, and has an associated DNS > name. Cool. That leaves a bunch of other possibilities. The first thing I’d check is your support for IPv6-only DNS64/NAT64 networks. Earlier you wrote: > gethostbyname(3) call returns a populated hostent struct The fact you’re using a legacy API like this implies that you’re not IPv6-compatible. To can learn more about this is my “Supporting IPv6-only Networks” pinned post on DevForums. <https://forums.developer.apple.com/message/136166#136166> IMPORTANT: You need to fix this even if it’s not the cause of this specific problem. You can test your fix by setting up MacNAT64, per FAQ#1 in the above-mentioned post. > On the iPhone, under Settings —> Cellular, the app shows enabled (green) … Cool. You can verify that this is working as expected by adding a simple test to your app that uses a high-level API for your networking. For example, the code pasted in below should successfully fetch data over both Wi-Fi and WWAN. If you put it in your app and it works over Wi-Fi but fails over WWAN, you know that something weird is going on with network interface access control. On the other hand, if this works over both Wi-Fi and WWAN but your BSD Sockets code fails on WWAN, you know the problem is with your code. Share and Enjoy -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware --------------------------------------------------------------------------- let url = URL(string: "https://www.apple.com";)! let request = URLRequest(url: url, cachePolicy: .reloadIgnoringLocalCacheData, timeoutInterval: 60.0) URLSession.shared.dataTask(with: request) { (data, response, error) in if let error = error as NSError? { NSLog("task transport error %@ / %d", error.domain, error.code) return } let response = response as! HTTPURLResponse let data = data! NSLog("task finished with status %d, bytes %d", response.statusCode, data.count) }.resume() --------------------------------------------------------------------------- _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/archive%40mail-archive.com This email sent to arch...@mail-archive.com
