Don't crash on failure to obtain version info and inform user on what is needed to be able to retrieve version info from the Go client.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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86646448ac
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33cdc14070
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@ -7,22 +7,28 @@ import PromiseKit
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import NetworkExtension
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enum GoVersionCoordinatorError: Error {
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case noSession
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case noEnabledSession
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case noResponse
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}
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extension AppCoordinator: SettingsTableViewControllerDelegate {
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func goVersionInformation() -> Promise<String> {
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return Promise(resolver: { (resolver) in
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guard let session = self.providerManagers?.first?.connection as? NETunnelProviderSession else {
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resolver.reject(GoVersionCoordinatorError.noSession)
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guard let session = self.providerManagers?.first(where: { $0.isEnabled })?.connection as? NETunnelProviderSession else {
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resolver.reject(GoVersionCoordinatorError.noEnabledSession)
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return
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}
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do {
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try session.sendProviderMessage(ExtensionMessage.requestVersion.data, responseHandler: { (data) in
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guard let responseString = String(data: data!, encoding: .utf8) else {
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guard let data = data, let responseString = String(data: data, encoding: .utf8) else {
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resolver.reject(GoVersionCoordinatorError.noResponse)
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return
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}
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resolver.fulfill(responseString)
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})
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} catch {
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resolver.reject(error)
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}
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})
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}
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@ -35,8 +35,15 @@ class SettingsTableViewController: UITableViewController {
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label.text = goVersion
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}
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return Guarantee.value(())
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}.recover({ (_) in
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}.recover({ (error) in
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switch error {
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case GoVersionCoordinatorError.noEnabledSession:
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self.goVersionInfoLabel.text = NSLocalizedString("Unavailable", comment: "")
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self.showNotEnabledAlert()
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default:
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self.goVersionInfoLabel.text = NSLocalizedString("Unknown", comment: "")
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}
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})
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}
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@ -69,6 +76,13 @@ class SettingsTableViewController: UITableViewController {
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return self.delegate?.goVersionInformation() ?? Promise(error: GoVersionError.noDelegate)
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}
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private func showNotEnabledAlert() {
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let notEnabledAlertController = UIAlertController(title: NSLocalizedString("Go version", comment: ""), message: NSLocalizedString("Enable a WireGuard config by connecting or by selecting one in the VPN section of the device Settings app.", comment: ""), preferredStyle: .alert)
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notEnabledAlertController.addAction(UIAlertAction(title: NSLocalizedString("Ok", comment: "Generic OK button"), style: .default, handler: nil))
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present(notEnabledAlertController, animated: true, completion: nil)
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}
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private func showCopyConfirmation() {
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let confirmationAlertController = UIAlertController(title: NSLocalizedString("Copied version information", comment: ""), message: UIPasteboard.general.string, preferredStyle: .alert)
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confirmationAlertController.addAction(UIAlertAction(title: NSLocalizedString("Ok", comment: "Generic OK button"), style: .default, handler: nil))
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@ -112,7 +112,9 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
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override func handleAppMessage(_ messageData: Data, completionHandler: ((Data?) -> Void)?) {
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let responseData: Data?
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switch ExtensionMessage(messageData) {
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let message = ExtensionMessage(messageData)
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switch message {
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case ExtensionMessage.requestVersion:
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responseData = (wgVersion().flatMap { String(cString: $0) } ?? "").data(using: .utf8)
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default:
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