Jaa

NetworkOperatorTetheringSessionAccessPointConfiguration Class

  • Reference

Definition

Namespace:
Windows.Networking.NetworkOperators
Edit

Contains all per-session configuration fields used to configure the Wi-Fi tethering hotspot, plus relevant helper methods.

NetworkOperatorTetheringSessionAccessPointConfiguration contains the same fields and helper methods as its persistent counterpart NetworkOperatorTetheringAccessPointConfiguration does, with several additions. But all the configurable properties from NetworkOperatorTetheringSessionAccessPointConfiguration are treated as per-session, including all the shared properties.

NetworkOperatorTetheringSessionAccessPointConfiguration is used primarily in combination with StartTetheringAsync to specify the per-session tethering configuration. Doing so won't clear or alter the existing persistent configuration. Calling StartTetheringAsync with no parameters always uses the persistent configuration pre-configured via ConfigureAccessPointAsync.

public ref class NetworkOperatorTetheringSessionAccessPointConfiguration sealed
/// [Windows.Foundation.Metadata.Activatable(1114112, "Windows.Foundation.UniversalApiContract")]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 1114112)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class NetworkOperatorTetheringSessionAccessPointConfiguration final
[Windows.Foundation.Metadata.Activatable(1114112, "Windows.Foundation.UniversalApiContract")]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 1114112)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class NetworkOperatorTetheringSessionAccessPointConfiguration
function NetworkOperatorTetheringSessionAccessPointConfiguration()
Public NotInheritable Class NetworkOperatorTetheringSessionAccessPointConfiguration
Inheritance
Object Platform::Object IInspectable NetworkOperatorTetheringSessionAccessPointConfiguration
Attributes
ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Windows requirements

Device family
Windows 11, version 24H2 (introduced in 10.0.26100.0)
API contract
Windows.Foundation.UniversalApiContract (introduced in v19.0)
App capabilities
wiFiControl

Examples

The tethering API in the Windows.Networking.NetworkOperators namespace provides a comprehensive set of functionalities that enable you to programmatically configure and control tethering (that is, sharing a device's internet connection with other devices). The code example below demonstrates the use of per-session tethering configurations.

With the per-session tethering configurations, you can temporarily override the persistent tethering hotspot configuration without permanently altering it. That's particularly useful when a temporary setting is required. For example, when connecting an HMD to a PC by using mobile hotspot, but when you want to make things as seamless as possible by connecting the device via a temporary Wi-Fi network, without revealing the configuration details to the user, and without altering the user's current mobile hotspot configuration.

Moreover, to achieve a low latency and low jitter connection to the PC, you might want to use a 6 GHz connection. If the user's PC is connected to the internet via a 5 GHz Wi-Fi connection, then the mobile hotspot can't be started on the 6 GHz band. So there's a per-session parameter, PerformancePriority, that tells the driver how to prioritize performance between the tethering hotspot and the station connection. The Default constant tells the driver to prioritize the station connection over everything else. On the other hand, TetheringOverStation tells the driver to prioritize the performance of the tethering hotspot, thus allowing the driver to downgrade the station connection to 2.4 GHz if needed. This is all to offer the user as much of a seamless experience as possible, without requiring them to personally change the hotspot configuration and station connection.

The code sample below showcases:

  • API support verification. It's important that your app tests whether the operating system it happens to be running on supports per-session tethering configurations. To do that, use the ApiInformation.IsApiContractPresent method.
  • Obtaining the tethering manager. The code sample's locally-defined GetTetheringManagerForCurrentConnection method identifies the internet connection profile in use, and retrieves a tethering manager that corresponds to that profile. The tethering manager is later used to retrieve the primary access point configuration, and start the actual tethering session.
  • Setting up the session configuration. You can derive a tethering session configuration from the existing primary configuration, or set one up from scratch. You can then set or modify various parameters, like the SSID, passphrase, band, authentication kind, and performance priority.
  • Starting the tethering session. The session configuration can be passed to the StartTetheringAsync method to initiate the tethering session. This method also provides extensive feedback through the TetheringOperationStatus enum, offering a nuanced understanding of the operation's result.
using System;
using System.Threading.Tasks;
using Windows.Foundation.Metadata;
using Windows.Networking.NetworkOperators;
using Windows.Networking.Connectivity;

namespace TetheringApiDemoApp
{
  static class TetheringApiDemoClass
  {
    // Sample desired per-session access point configuration values.
    private const string DesiredSsid = "DemoSsid";

    private const string DesiredPassphrase = "DemoPassphrase";

    private const TetheringWiFiBand DesiredBand =
      TetheringWiFiBand.SixGigahertz;

    private const TetheringWiFiAuthenticationKind DesiredAuthenticationKind =
      TetheringWiFiAuthenticationKind.Wpa3;

    private const TetheringWiFiPerformancePriority DesiredPerformancePriority =
      TetheringWiFiPerformancePriority.TetheringOverStation;

    public static void VerifyPerSessionTetheringApiSupport()
    {
      if (!ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 17))
      {
        throw new InvalidOperationException(
          "This OS doesn't support per-session tethering configurations.");
      }
    }

    public static NetworkOperatorTetheringManager GetTetheringManagerForCurrentConnection()
    {
      // Get the connection profile associated with the internet connection currently used by the local machine.
      ConnectionProfile currentConnectionProfile = NetworkInformation.GetInternetConnectionProfile();

      if (currentConnectionProfile == null)
      {
        throw new InvalidOperationException("Machine isn't connected to the internet.");
      }

      TetheringCapability tetheringCapability =
        NetworkOperatorTetheringManager.GetTetheringCapabilityFromConnectionProfile(currentConnectionProfile);

      if (tetheringCapability != TetheringCapability.Enabled)
      {
        throw new InvalidOperationException(
          $"Tethering is disabled on this machine. Reason code: {tetheringCapability}.");
      }

      return NetworkOperatorTetheringManager.CreateFromConnectionProfile(currentConnectionProfile);
    }

    public static async Task<NetworkOperatorTetheringSessionAccessPointConfiguration>
      SetUpSessionConfigurationAsync(NetworkOperatorTetheringManager tetheringManager)
    {
      NetworkOperatorTetheringSessionAccessPointConfiguration sessionConfiguration =
         new NetworkOperatorTetheringSessionAccessPointConfiguration();

      sessionConfiguration.Ssid = DesiredSsid;
      sessionConfiguration.Passphrase = DesiredPassphrase;

      if (await sessionConfiguration.IsBandSupportedAsync(DesiredBand))
      {
        sessionConfiguration.Band = DesiredBand;
      }
      else
      {
        throw new InvalidOperationException("Desired band isn't supported.");
      }

      if (await sessionConfiguration.IsAuthenticationKindSupportedAsync(DesiredAuthenticationKind))
      {
        sessionConfiguration.AuthenticationKind = DesiredAuthenticationKind;
      }
      else
      {
        throw new InvalidOperationException("Desired authentication kind isn't supported.");
      }

      sessionConfiguration.PerformancePriority = DesiredPerformancePriority;

      return sessionConfiguration;
    }

    public static async Task StartTetheringSessionAsync(
      NetworkOperatorTetheringManager tetheringManager,
      NetworkOperatorTetheringSessionAccessPointConfiguration sessionConfiguration)
    {
      TetheringOperationStatus operationResult =
        await tetheringManager.StartTetheringAsync(sessionConfiguration);

      if (operationResult.Status == TetheringOperationStatus.Success)
      {
        Console.WriteLine("Tethering started successfully.");
      }
      else if (operationResult.Status == TetheringOperationStatus.AlreadyOn)
      {
        // Custom error message for AlreadyOn status.
        Console.WriteLine("Tethering is already on.");
      }
      else if (operationResult.Status == TetheringOperationStatus.RadioRestriction)
      {
        // Custom error message for RadioRestriction status.
        Console.WriteLine(
          "Can't start tethering at 6 GHz due to radio restrictions (2x2 + dual radio).");
      }
      else if (operationResult.Status == TetheringOperationStatus.BandInterference)
      {
        // Custom error message for BandInterference status.
        Console.WriteLine(
          "Can't start tethering at 6 GHz because a 5 GHz connection interferes.");
      }
      else
      {
        // Generic error message for all other statuses.
        Console.WriteLine(
          $"Failed to start tethering: {operationResult.AdditionalErrorMessage}.");
      }
    }

    public static async Task Main()
    {
      try
      {
        VerifyPerSessionTetheringApiSupport();

        NetworkOperatorTetheringManager tetheringManager = GetTetheringManagerForCurrentConnection();

        NetworkOperatorTetheringSessionAccessPointConfiguration sessionConfiguration =
          await SetUpSessionConfigurationAsync(tetheringManager);

        await StartTetheringSessionAsync(tetheringManager, sessionConfiguration);
      }
      catch (InvalidOperationException ex)
      {
        Console.WriteLine($"Failed to initialize tethering configuration: {ex.Message}.");
      }
      catch (Exception ex)
      {
        Console.WriteLine($"Unexpected error: {ex.Message}.");
      }
    }
  }
}

Remarks

Tethering is a feature that allows a Windows device to function as a mobile hotspot: providing internet connections to other devices over Wi-Fi or Bluetooth. Four persistent fields can be configured on the Wi-Fi tethering hotspot: the network SSID, the network password, the network wireless frequency band (for example, 2.4 GHz, 5 GHz, 6 GHz), and the network authentication algorithm (for example, WPA2, WPA3). Once set, all of those fields persist between tethering sessions; meaning that the values are stored in non-volatile storage.

But you can also start a tethering session using an entirely per-session configuration. A per-session tethering configuration doesn't persist between tethering sessions, and doesn't alter the current persistent configuration. A per-session field is performance priority.

So the purpose of NetworkOperatorTetheringSessionAccessPointConfiguration is to specify the per-session tethering configuration when starting the tethering session via StartTetheringAsync. The additional members of this per-session-only class are typically values that aren't currently configurable by users via Windows Settings.

Constructors

NetworkOperatorTetheringSessionAccessPointConfiguration()

Creates an instance of the NetworkOperatorTetheringSessionAccessPointConfiguration.

Properties

AuthenticationKind

Gets or sets the authentication kind to be used for the Wi-Fi tethering connection. Similar to NetworkOperatorTetheringAccessPointConfiguration.AuthenticationKind.
Band

Gets or sets the frequency band to be used for the Wi-Fi tethering connection. Similar to NetworkOperatorTetheringAccessPointConfiguration.Band.
Passphrase

Gets or sets the network passphrase to be used for the Wi-Fi tethering connection. Similar to NetworkOperatorTetheringAccessPointConfiguration.Passphrase.
PerformancePriority

Gets or sets the performance priority value to be used for the Wi-Fi tethering connection when the main internet connection is also over Wi-Fi. If the station connection is on a frequency band that interferes with the requested tethering frequency band, then the Wi-Fi chipset will attempt to change the connection's frequency band to another one that won't interfere.

Many Wi-Fi chipsets have a limitation where if the main connection is over a 5 GHz band, then the tethering hotspot can't be configured to use a 6 GHz band. Prioritizing the tethering connection (TetheringOverStation) will tell the Wi-Fi chipset to attempt to change the main connection over to a 2.4 GHz band, so that there'll no longer be interference with the requested 6 GHz band for the tethering hotspot.

If the frequency band shift isn't possible or allowed by specifying a different performance priority value, then calling StartTetheringAsync will fail with an appropriate result status (BandInterference).
Ssid

Gets or sets the network SSID to be used for the Wi-Fi tethering connection. Similar to NetworkOperatorTetheringAccessPointConfiguration.Ssid.

Methods

IsAuthenticationKindSupported(TetheringWiFiAuthenticationKind)

Gets a value indicating whether the Wi-Fi adapter allows configuring the tethering hotspot with a specific authentication kind. Similar to NetworkOperatorTetheringAccessPointConfiguration.IsAuthenticationKindSupported.
IsAuthenticationKindSupportedAsync(TetheringWiFiAuthenticationKind)

Asynchronously gets a value indicating whether the Wi-Fi adapter allows configuring the tethering hotspot with a specific authentication kind. Similar to NetworkOperatorTetheringAccessPointConfiguration.IsAuthenticationKindSupportedAsync.
IsBandSupported(TetheringWiFiBand)

Gets a value indicating whether the Wi-Fi adapter allows configuring the tethering hotspot with a specific frequency band. Similar to NetworkOperatorTetheringAccessPointConfiguration.IsBandSupported.
IsBandSupportedAsync(TetheringWiFiBand)

Asynchronously gets a value indicating whether the Wi-Fi adapter allows configuring the tethering hotspot with a specific frequency band. Similar to NetworkOperatorTetheringAccessPointConfiguration.IsBandSupportedAsync.

Applies to