I have come across a problem when using a NetworkExtension in Swift to utilise OpenVPN or Wireguard with the NETunnelProviderManager
.
I have the following code in the ViewDidLoad() of my mainViewController. I don't load it twice, and it works fine when using the Apple integrated IKEv2.
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.NEVPNStatusDidChange, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(vpnStatusDidChange(_:)), name: NSNotification.Name.NEVPNStatusDidChange, object: nil)
But when I use OpenVPN or Wireguard via the Networkextension, these network-status-change-events keep firing n+1 upon each connection. First time it fires once. Second time I connect and disconnect, I see the network-statuses has fired twice, then three times etc.
I have been researching a lot and couldn't find a solution. But I found a possible workaround:
func loadTunnelProviderManager(completion:@escaping () -> Void) {
NETunnelProviderManager.loadAllFromPreferences { (managers, error) in
if error == nil {
self.tunnelProviderManager = managers?.first ?? NETunnelProviderManager()
completion()
}
}
}
If I don't retrieve managers?.first
and instantiate it each time instead:
self.tunnelProviderManager = NETunnelProviderManager()
Then the issue is resolved. However every time I connect to the VPN, inevitably a new VPN config is also created in the settings, which is not ideal.
TL;DR
Long story short, how do I delete all existing managers before instantiating a new NETunnelProviderManager
? I know this might go against the convention, but it will solve the issue.