NEVPNManager check is connected after restart the app?

Question

I coding a VPN tool, using the NetworkExtension framework. I can connect IPSec through NEVPNManager.sharedManager, and can grab the notification when VPN connect status changed. But when I kill the app, and reopen it, the NEVPNManager.Connect.Status always Zero, than means can't display the correct connect state. How to solve it?

After you kill your app do you still see the [VPN] indicator in the status bar? — hungri-yeti, Aug 21 '16 at 01:33

score 9 · Answer 1 · answered Dec 07 '17 at 07:11

William Sterling comment does make sense, & it works for me,

Before adding observer for NEVPNStatusDidChange load preferences for VPN Manager object like bellow,

override func viewDidLoad() {

        super.viewDidLoad()

        self.vpnManager.loadFromPreferences { (error) in
            if error != nil {
                print(error.debugDescription)
            }
            else{
                print("No error from loading VPN viewDidLoad")
            }
        }

        NotificationCenter.default.addObserver(self, selector: #selector(ViewController.VPNStatusDidChange(_:)), name: NSNotification.Name.NEVPNStatusDidChange, object: nil)

     }

score 6 · Accepted Answer · answered Aug 21 '16 at 04:42

6

Try this:

func viewDidLoad() {
    // Register to be notified of changes in the status. These notifications only work when app is in foreground.
    notificationObserver = NSNotificationCenter.defaultCenter().addObserverForName(NEVPNStatusDidChangeNotification, object: nil , queue: nil) {
       notification in

       print("received NEVPNStatusDidChangeNotification")

       let nevpnconn = notification.object as! NEVPNConnection
       let status = nevpnconn.status
       self.checkNEStatus(status)
    }
}



func checkNEStatus( status:NEVPNStatus ) {
    switch status {
    case NEVPNStatus.Invalid:
      print("NEVPNConnection: Invalid")
    case NEVPNStatus.Disconnected:
      print("NEVPNConnection: Disconnected")
    case NEVPNStatus.Connecting:
      print("NEVPNConnection: Connecting")
    case NEVPNStatus.Connected:
      print("NEVPNConnection: Connected")
    case NEVPNStatus.Reasserting:
      print("NEVPNConnection: Reasserting")
    case NEVPNStatus.Disconnecting:
      print("NEVPNConnection: Disconnecting")
  }
}

The above code should generate the following messages when running the app with VPN already connected:

checkNEStatus:  NEVPNConnection: Invalid  
viewDidLoad:    received NEVPNStatusDidChangeNotification  
checkNEStatus:  NEVPNConnection: Connected

answered Aug 21 '16 at 04:42

hungri-yeti

584
1
5
6

I have do this, In my viewController, the code is`[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(VPNStatusChanged:) name:NEVPNStatusDidChangeNotification object:nil]; // the status always NEVPNStatusInvalid ... NSLog(@"vpn status is %ld", [NEVPNManager sharedManager].connection.status);` and I can observe the state. but if kill the app, and reopen, the state always invalid. – William Sterling Aug 21 '16 at 04:57
3

got it ! must load the vpn config before the notification, and then the NEVPNStatusDidChangeNotification worked ! thanks a lot. – William Sterling Aug 21 '16 at 05:16
1

Are you retaining the NSObjectProtocol returned from addObserver? My previous snippet doesn't show it but I have: `var notificationObserver:NSObjectProtocol?` as a class var in the view controller – hungri-yeti Aug 21 '16 at 05:22
just saw your comment, glad to help. – hungri-yeti Aug 21 '16 at 05:23
I'm experiencing wrong sorting on notification ... the last notification doesn't reflect the current VPN status. Is it possible? – Lubbo Oct 01 '19 at 06:51

NEVPNManager check is connected after restart the app?

2 Answers2