Ability to detect whether we are connected via a VPN on iOS · dotnet/maui#21873

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説明

Description

I work on an Android/iOS app that we recently ported from Xamarin to MAUI. Our application requires the ability to detect whether the user is connected via a VPN. This is possible on Android via ConnectivityManager.GetNetworkCapabilities(connectivityManager.ActiveNetwork).HasTransport(TransportType.Vpn)

On Xamarin, we implemented the iOS VPN detection like so:

var settings = (CFProxySettings) CFNetwork.GetSystemProxySettings();
var keys = settings.Dictionary.ValueForKey(new NSString("__SCOPED__")) as NSDictionary;
string[] vpnProtocols = { "tap", "tun", "utun2", "ppp", "ipsec", "ipsec0" };
return keys.Any(k => vpnProtocols.Any(v => k.Key.ToString().Contains(v)));

as per https://stackoverflow.com/questions/54932217/getting-vpn-connection-status-on-xamarin-ios

However, on MAUI, the CFNetwork.GetSystemProxySettings() method is missing. Is there an alternative way to detect this, or could I request the restoration of this API?

Public API Changes

CFNetwork.GetSystemProxySettings() // as per CoreFoundation in Xamarin.iOS.dll

Intended Use-Case

Detecting VPN connection to improve connectivity management.

コントリビューターガイド

技術スタック: csharp
領域: mobile
Issue 種別: feature
難度: 3
推定時間: 1-2 days
活動状況: fresh
明確さ: clear
前提条件: C#.NET MAUIiOS networkingCoreFoundation
初心者向け度: 65
調査方針: Investigate the missing CFNetwork.GetSystemProxySettings() method in .NET MAUI's CoreFoundation bindings. Review the Xamarin.iOS implementation linked in the issue for reference (see StackOverflow). Check the MAUI repository for any existing iOS network capability detection code. Look into Apple's documentation for proxy settings on iOS. A potential fix involves restoring the API or finding an alternative via CFNetwork.