NE: When there's an error starting the tunnel, show it to the user using displayMessage()

Signed-off-by: Roopesh Chander <roop@roopc.net>
2018-11-09 16:53:52 +05:30
parent a1070d2b29
commit 3136fe0e2c
4 changed files with 35 additions and 1 deletions
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018 WireGuard LLC. All Rights Reserved.
+
+import NetworkExtension
+
+class ErrorNotifier {
+    static func errorMessage(for error: PacketTunnelProviderError) -> (String, String)? {
+        switch (error) {
+        case .savedProtocolConfigurationIsInvalid:
+            return ("Activation failure", "Could not retrieve tunnel information from the saved configuration")
+        case .dnsResolutionFailure(_):
+            return ("DNS resolution failure", "One or more endpoint domains could not be resolved")
+        case .couldNotStartWireGuard:
+            return ("Activation failure", "WireGuard backend could not be started")
+        case .coultNotSetNetworkSettings:
+            return ("Activation failure", "Error applying network settings on the tunnel")
+        }
+    }
+
+    static func notify(_ error: PacketTunnelProviderError, from tunnelProvider: NEPacketTunnelProvider) {
+        guard let (title, message) = ErrorNotifier.errorMessage(for: error) else { return }
+        // displayMessage() is deprecated, but there's no better alternative to show the error to the user
+        tunnelProvider.displayMessage("\(title): \(message)", completionHandler: { (_) in })
+    }
+}