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//
// AppCoordinator.swift
// WireGuard
//
// Created by Jeroen Leenarts on 23-05-18.
// Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All rights reserved.
//
import Foundation
import NetworkExtension
import os.log
import CoreData
import BNRCoreDataStack
extension UINavigationController: Identifyable {}
let APPGROUP = "group.com.wireguard.ios.WireGuard"
let VPNBUNDLE = "com.wireguard.ios.WireGuard.WireGuardNetworkExtension"
class AppCoordinator: RootViewCoordinator {
let persistentContainer = NSPersistentContainer(name: "WireGuard")
let storyboard = UIStoryboard(name: "Main", bundle: nil)
var providerManagers: [NETunnelProviderManager]?
// MARK: - Properties
var childCoordinators: [Coordinator] = []
var rootViewController: UIViewController {
return self.tunnelsTableViewController
}
var tunnelsTableViewController: TunnelsTableViewController!
/// Window to manage
let window: UIWindow
let navigationController: UINavigationController = {
let navController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(type: UINavigationController.self)
return navController
}()
// MARK: - Init
public init(window: UIWindow) {
self.window = window
self.window.rootViewController = self.navigationController
self.window.makeKeyAndVisible()
NotificationCenter.default.addObserver(self,
selector: #selector(VPNStatusDidChange(notification:)),
name: .NEVPNStatusDidChange,
object: nil)
}
// MARK: - Functions
/// Starts the coordinator
public func start() {
NETunnelProviderManager.loadAllFromPreferences { [weak self] (managers, error) in
if let error = error {
os_log("Unable to load provider managers: %{public}@", log: Log.general, type: .error, error.localizedDescription)
}
self?.providerManagers = managers
}
persistentContainer.viewContext.automaticallyMergesChangesFromParent = true
persistentContainer.loadPersistentStores { [weak self] (_, error) in
if let error = error {
print("Unable to Load Persistent Store. \(error), \(error.localizedDescription)")
} else {
DispatchQueue.main.async {
//start
if let tunnelsTableViewController = self?.storyboard.instantiateViewController(type: TunnelsTableViewController.self) {
self?.tunnelsTableViewController = tunnelsTableViewController
self?.tunnelsTableViewController.viewContext = self?.persistentContainer.viewContext
self?.tunnelsTableViewController.delegate = self
self?.navigationController.viewControllers = [tunnelsTableViewController]
do {
if let context = self?.persistentContainer.viewContext, try Tunnel.countInContext(context) == 0 {
print("No tunnels ... yet")
}
} catch {
self?.showError(error)
}
}
}
}
}
}
// MARK: - NEVPNManager handling
@objc private func VPNStatusDidChange(notification: NSNotification) {
//TODO implement
guard let session = notification.object as? NETunnelProviderSession else {
return
}
os_log("VPNStatusDidChange: %{public}@", log: Log.general, type: .debug, description(for: session.status))
}
public func showError(_ error: Error) {
showAlert(title: NSLocalizedString("Error", comment: "Error alert title"), message: error.localizedDescription)
}
private func showAlert(title: String, message: String) {
let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: NSLocalizedString("OK", comment: "OK button"), style: .default))
self.navigationController.present(alert, animated: true)
}
private func description(for status: NEVPNStatus) -> String {
switch status {
case .connected:
return "Connected"
case .connecting:
return "Connecting"
case .disconnected:
return "Disconnected"
case .disconnecting:
return "Disconnecting"
case .invalid:
return "Invalid"
case .reasserting:
return "Reasserting"
}
}
}
extension AppCoordinator: TunnelsTableViewControllerDelegate {
func addProvider(tunnelsTableViewController: TunnelsTableViewController) {
let addContext = persistentContainer.newBackgroundContext()
showTunnelConfigurationViewController(tunnel: nil, context: addContext)
}
func connect(tunnel: Tunnel, tunnelsTableViewController: TunnelsTableViewController) {
let manager = self.providerManager(for: tunnel)!
let block = {
switch manager.connection.status {
case .invalid, .disconnected:
self.connect(tunnel: tunnel)
case .connected, .connecting:
self.disconnect(tunnel: tunnel)
default:
break
}
}
if manager.connection.status == .invalid {
manager.loadFromPreferences { (_) in
block()
}
} else {
block()
}
}
private func connect(tunnel: Tunnel) {
os_log("connect tunnel: %{public}@", log: Log.general, type: .info, tunnel.description)
// Should the manager be enabled?
let manager = providerManager(for: tunnel)
let session = manager?.connection as! NETunnelProviderSession //swiftlint:disable:this force_cast
do {
try session.startTunnel()
} catch let error {
os_log("error starting tunnel: %{public}@", log: Log.general, type: .error, error.localizedDescription)
}
}
func disconnect(tunnel: Tunnel) {
let manager = providerManager(for: tunnel)
manager?.connection.stopVPNTunnel()
}
func configure(tunnel: Tunnel, tunnelsTableViewController: TunnelsTableViewController) {
print("configure tunnel \(tunnel)")
let editContext = persistentContainer.newBackgroundContext()
var backgroundTunnel: Tunnel?
editContext.performAndWait {
backgroundTunnel = editContext.object(with: tunnel.objectID) as? Tunnel
}
showTunnelConfigurationViewController(tunnel: backgroundTunnel, context: editContext)
}
func showTunnelConfigurationViewController(tunnel: Tunnel?, context: NSManagedObjectContext) {
let tunnelConfigurationViewController = storyboard.instantiateViewController(type: TunnelConfigurationTableViewController.self)
tunnelConfigurationViewController.configure(context: context, delegate: self, tunnel: tunnel)
self.navigationController.pushViewController(tunnelConfigurationViewController, animated: true)
}
func delete(tunnel: Tunnel, tunnelsTableViewController: TunnelsTableViewController) {
print("delete tunnel \(tunnel)")
if let moc = tunnel.managedObjectContext {
moc.perform {
moc.delete(tunnel)
moc.saveContextToStore()
}
let manager = providerManager(for: tunnel)
manager?.removeFromPreferences { (error) in
if let error = error {
os_log("error removing preferences: %{public}@", log: Log.general, type: .error, error.localizedDescription)
return
}
os_log("removed preferences", log: Log.general, type: .info)
}
}
}
private func providerManager(for tunnel: Tunnel) -> NETunnelProviderManager? {
return self.providerManagers?.first {
guard let prot = $0.protocolConfiguration as? NETunnelProviderProtocol else {
return false
}
guard let tunnelIdentifier = prot.providerConfiguration?["tunnelIdentifier"] as? String else {
return false
}
return tunnelIdentifier == tunnel.tunnelIdentifier
}
}
}
extension AppCoordinator: TunnelConfigurationTableViewControllerDelegate {
func didSave(tunnel: Tunnel, tunnelConfigurationTableViewController: TunnelConfigurationTableViewController) {
let manager = providerManager(for: tunnel) ?? NETunnelProviderManager()
manager.localizedDescription = tunnel.title
let protocolConfiguration = NETunnelProviderProtocol()
protocolConfiguration.providerBundleIdentifier = VPNBUNDLE
protocolConfiguration.serverAddress = (tunnel.peers?.array as? [Peer])?.compactMap { $0.endpoint}.joined(separator: ", ")
protocolConfiguration.providerConfiguration = tunnel.generateProviderConfiguration()
manager.protocolConfiguration = protocolConfiguration
let connectRule = NEOnDemandRuleConnect()
connectRule.interfaceTypeMatch = .any
manager.onDemandRules = [connectRule]
// manager.isOnDemandEnabled = true
manager.saveToPreferences { (error) in
if let error = error {
os_log("error saving preferences: %{public}@", log: Log.general, type: .error, error.localizedDescription)
return
}
os_log("saved preferences", log: Log.general, type: .info)
}
navigationController.popToRootViewController(animated: true)
}
}
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