Review requirements of DNS over TLS (DoT)

- Make DNS servers optional in TunnelKit

- Allow IP address as DoT server name

Passepartout.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -51,7 +51,7 @@
         "repositoryURL": "https://github.com/passepartoutvpn/tunnelkit",
         "state": {
           "branch": null,
-          "revision": "f0a5557cfb144f66d1be8baf3abeca6d480e44e1",
+          "revision": "e075ba6a76ccfa0cc667a58933fb124c95c1f33d",
           "version": null
         }
       },

Passepartout/App/Constants/Theme.swift

@@ -427,6 +427,13 @@ extension View {
             .disableAutocorrection(true)
     }
 
+    func themeDNSOverTLSServerName(_ string: String?) -> some View {
+        themeValidating(string, validator: Validators.dnsOverTLSServerName)
+            .keyboardType(.asciiCapable)
+            .autocapitalization(.none)
+            .disableAutocorrection(true)
+    }
+
     func themeSSID(_ text: String?) -> some View {
         themeValidating(text, validator: Validators.notEmpty)
             .keyboardType(.asciiCapable)

Passepartout/App/Reusable/Validators.swift

@@ -77,4 +77,12 @@ struct Validators {
             throw ValidationError.url
         }
     }
+
+    static func dnsOverTLSServerName(_ string: String) throws {
+        do {
+            try domainName(string)
+        } catch {
+            try ipAddress(string)
+        }
+    }
 }

Passepartout/App/Views/NetworkSettingsView.swift

@@ -157,7 +157,7 @@ extension NetworkSettingsView {
 
     private var dnsManualTLSRow: some View {
         TextField(Unlocalized.Placeholders.dotServerName, text: $settings.dns.dnsTLSServerName ?? "")
-            .themeDomainName(settings.dns.dnsTLSServerName)
+            .themeDNSOverTLSServerName(settings.dns.dnsTLSServerName)
     }
 
     private var dnsManualServers: some View {

PassepartoutCore/Package.swift

@@ -24,7 +24,7 @@ let package = Package(
         // Dependencies declare other packages that this package depends on.
         // .package(url: /* package url */, from: "1.0.0"),
 //        .package(name: "TunnelKit", url: "https://github.com/passepartoutvpn/tunnelkit", from: "4.1.0"),
-        .package(name: "TunnelKit", url: "https://github.com/passepartoutvpn/tunnelkit", .revision("f0a5557cfb144f66d1be8baf3abeca6d480e44e1")),
+        .package(name: "TunnelKit", url: "https://github.com/passepartoutvpn/tunnelkit", .revision("e075ba6a76ccfa0cc667a58933fb124c95c1f33d")),
 //        .package(name: "TunnelKit", path: "../../tunnelkit"),
         .package(url: "https://github.com/zoul/generic-json-swift", from: "2.0.0"),
         .package(url: "https://github.com/SwiftyBeaver/SwiftyBeaver", from: "1.9.0")