57 lines
2.7 KiB
Swift
57 lines
2.7 KiB
Swift
// SPDX-License-Identifier: MIT
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// Copyright © 2018 WireGuard LLC. All Rights Reserved.
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import NetworkExtension
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class ErrorNotifier {
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let activationAttemptId: String?
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weak var tunnelProvider: NEPacketTunnelProvider?
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var tunnelName: String?
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var isActivateOnDemandEnabled = false
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init(activationAttemptId: String?, tunnelProvider: NEPacketTunnelProvider) {
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self.activationAttemptId = activationAttemptId
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self.tunnelProvider = tunnelProvider
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ErrorNotifier.removeLastErrorFile()
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}
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func errorMessage(for error: PacketTunnelProviderError) -> (String, String)? {
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switch error {
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case .savedProtocolConfigurationIsInvalid:
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return ("Activation failure", "Could not retrieve tunnel information from the saved configuration.")
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case .dnsResolutionFailure:
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return ("DNS resolution failure", "One or more endpoint domains could not be resolved.")
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case .couldNotStartWireGuard:
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return ("Activation failure", "WireGuard backend could not be started.")
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case .coultNotSetNetworkSettings:
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return ("Activation failure", "Error applying network settings on the tunnel.")
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}
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}
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func notify(_ error: PacketTunnelProviderError) {
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guard let (title, message) = errorMessage(for: error) else { return }
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if let activationAttemptId = activationAttemptId, let lastErrorFilePath = FileManager.networkExtensionLastErrorFileURL?.path {
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// The tunnel was started from the app
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let onDemandMessage = isActivateOnDemandEnabled ? " This tunnel has Activate On Demand enabled, so this tunnel might be activated automatically. You may turn off Activate On Demand in the WireGuard app by navigating to: '\(tunnelName ?? "tunnel")' > Edit." : ""
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let errorMessageData = "\(activationAttemptId)\n\(title)\n\(message)\(onDemandMessage)".data(using: .utf8)
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FileManager.default.createFile(atPath: lastErrorFilePath, contents: errorMessageData, attributes: nil)
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} else {
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// The tunnel was probably started from iOS Settings app or activated on-demand
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if let tunnelProvider = self.tunnelProvider {
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// displayMessage() is deprecated, but there's no better alternative if invoked from iOS Settings
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if !isActivateOnDemandEnabled { // If using activate-on-demand, don't use displayMessage
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tunnelProvider.displayMessage("\(title): \(message)") { _ in }
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}
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}
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}
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}
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static func removeLastErrorFile() {
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if let lastErrorFileURL = FileManager.networkExtensionLastErrorFileURL {
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_ = FileManager.deleteFile(at: lastErrorFileURL)
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}
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}
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}
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