let tunnelBundleId = ""
let serverAddress = "76.185.74.60"
let serverPort = "1123"
let mtu = "1500"
let ip = "10.8.0.2"
let subnet = "255.255.255.0"
let dns = "8.8.8.8,8.4.4.4"


private func initVPNTunnelProviderManager() {
    NETunnelProviderManager.loadAllFromPreferences { (savedManagers: [NETunnelProviderManager]?, error: Error?) in
        if let error = error {
            print(error)
        }
        if let savedManagers = savedManagers {
            if savedManagers.count > 0 {
                self.vpnManager = savedManagers[0]
            }
        }

        self.vpnManager.loadFromPreferences(completionHandler: { (error:Error?) in
            if let error = error {
                print(error)
            }

            let providerProtocol = NETunnelProviderProtocol()
            providerProtocol.providerBundleIdentifier = self.tunnelBundleId
            providerProtocol.providerConfiguration = ["port": self.serverPort,
                                                      "server": self.serverAddress,
                                                      "ip": self.ip,
                                                      "subnet": self.subnet,
                                                      "mtu": self.mtu,
                                                      "dns": self.dns
            ]
            providerProtocol.serverAddress = self.serverAddress
            self.vpnManager.protocolConfiguration = providerProtocol
            self.vpnManager.localizedDescription = "Niaj"
            self.vpnManager.isEnabled = true

            self.vpnManager.saveToPreferences(completionHandler: { (error:Error?) in
                if let error = error {
                    print(error)
                } else {
                    print("Save successfully")
                }
            })
            self.VPNStatusDidChange(nil)

        })
    }
}