ManagedNativeWifi 3.0.2

Managed Native Wifi

ManagedNativeWifi is a managed implementation of Native Wifi API. It provides functionality to manage wireless networks, interfaces and profiles.

Requirements

This library works on Windows and compatible with:

On Windows 11 (24H2) or newer, some methods require user's permission to access location information. Without the permission, UnauthorizedAccessException will be thrown. This permission can be set in Privacy & security > Location settings.

Download

NuGet: ManagedNativeWifi

Methods

Available methods including asynchronous ones based on TAP.

Properties

Usage

To check SSIDs of currently available wireless LANs, call EnumerateAvailableNetworkSsids method.

public static IEnumerable<string> EnumerateNetworkSsids()
{
    return NativeWifi.EnumerateAvailableNetworkSsids()
        .Select(x => x.ToString()); // UTF-8 string representation
}

In general, a SSID is represented by a UTF-8 string but it is not guaranteed. So if ToString method seems not to produce a valid value, try ToBytes method instead.

To check SSID, signal quality or other information on currently available wireless LANs, call EnumerateAvailableNetworks method.

public static IEnumerable<(string ssidString, int signalQuality)>
    EnumerateNetworkSsidsAndSignalQualities()
{
    return NativeWifi.EnumerateAvailableNetworks()
        .Select(x => (x.Ssid.ToString(), x.SignalQuality));
}

To connect to a wireless LAN, call ConnectNetworkAsync asynchronous method.

public static async Task<bool> ConnectAsync()
{
    var availableNetwork = NativeWifi.EnumerateAvailableNetworks()
        .Where(x => !string.IsNullOrWhiteSpace(x.ProfileName))
        .OrderByDescending(x => x.SignalQuality)
        .FirstOrDefault();

    if (availableNetwork is null)
        return false;

    return await NativeWifi.ConnectNetworkAsync(
        interfaceId: availableNetwork.InterfaceInfo.Id,
        profileName: availableNetwork.ProfileName,
        bssType: availableNetwork.BssType,
        timeout: TimeSpan.FromSeconds(10));
}

This method returns true if successfully connected to the wireless LAN in contrast to its synchronous sibling, ConnectNetwork method, returns true if the request for the connection succeeds and doesn't indicate the result.

To refresh currently available wireless LANs, call ScanNetworksAsync method.

public static Task RefreshAsync()
{
    return NativeWifi.ScanNetworksAsync(timeout: TimeSpan.FromSeconds(10));
}

This method requests wireless interfaces to scan wireless LANs in parallel. The timeout should be ideally no more than 4 seconds, but it can vary depending on the situation.

If you want to avoid disrupting existing wireless connections, you can use ScanNetworksAsync overload method with ScanMode.OnlyNotConnected.

public static Task RefreshNotConnectedAsync()
{
    return NativeWifi.ScanNetworksAsync(
        mode: ScanMode.OnlyNotConnected,
        null,
        null,
        timeout: TimeSpan.FromSeconds(10),
        CancellationToken.None);
}

Please note that if all wireless interfaces are connected, naturally nothing will happen.

To delete an existing wireless profile, use DeleteProfile method. Please note that a profile name is case-sensitive.

public static bool DeleteProfile(string profileName)
{
    var targetProfile = NativeWifi.EnumerateProfiles()
        .Where(x => profileName.Equals(x.Name, StringComparison.Ordinal))
        .FirstOrDefault();

    if (targetProfile is null)
        return false;

    return NativeWifi.DeleteProfile(
        interfaceId: targetProfile.InterfaceInfo.Id,
        profileName: profileName);
}

To check wireless LAN channels that are already used by surrounding access points, call EnumerateBssNetworks method and filter the results by RSSI.

public static IEnumerable<int> EnumerateNetworkChannels(int rssiThreshold)
{
    return NativeWifi.EnumerateBssNetworks()
        .Where(x => x.Rssi > rssiThreshold)
        .Select(x => x.Channel);
}

To turn on the radio of a wireless interface, check the current radio state by GetRadio method and then call TurnOnRadio method.

public static async Task<bool> TurnOnAsync()
{
    var targetInterface = NativeWifi.EnumerateInterfaces()
        .FirstOrDefault(x =>
        {
            var radioState = NativeWifi.GetRadio(x.Id)?.RadioStates.FirstOrDefault();
            if (radioState is null)
                return false;

            if (!radioState.IsHardwareOn) // Hardware radio state is off.
                return false;

            return !radioState.IsSoftwareOn; // Software radio state is off.
        });

    if (targetInterface is null)
        return false;

    try
    {
        return await Task.Run(() => NativeWifi.TurnOnRadio(targetInterface.Id));
    }
    catch (UnauthorizedAccessException)
    {
        return false;
    }
}

Please note that this method can only change software radio state and if hardware radio state is off (like hardware Wi-Fi switch is at off position), the radio cannot be turned on programatically.

To retrieve detailed information on wireless connections of connected wireless interfaces, you can use GetCurrentConnection, GetRssi, GetRealtimeConnectionQuality methods depending on your needs.

public static void ShowConnectedNetworkInformation()
{
    foreach (var interfaceId in NativeWifi.EnumerateInterfaces()
        .Where(x => x.State is InterfaceState.Connected)
        .Select(x => x.Id))
    {
        // Following methods work only with connected wireless interfaces.
        var (result, cc) = NativeWifi.GetCurrentConnection(interfaceId);
        if (result is ActionResult.Success)
        {
            Trace.WriteLine($"Profile: {cc.ProfileName}");
            Trace.WriteLine($"SSID: {cc.Ssid}");
            Trace.WriteLine($"PHY type: 802.11{cc.PhyType.ToProtocolName()}");
            Trace.WriteLine($"Authentication algorithm: {cc.AuthenticationAlgorithm}");
            Trace.WriteLine($"Cipher algorithm: {cc.CipherAlgorithm}");
            Trace.WriteLine($"Signal quality: {cc.SignalQuality}");
            Trace.WriteLine($"Rx rate: {cc.RxRate} Kbps");
            Trace.WriteLine($"Tx rate: {cc.TxRate} Kbps");
        }

        // GetRealtimeConnectionQuality method works only on Windows 11 24H2.
        (result, var rcq) = NativeWifi.GetRealtimeConnectionQuality(interfaceId);
        if (result is ActionResult.Success)
        {
            Trace.WriteLine($"PHY type: 802.11{rcq.PhyType.ToProtocolName()}");
            Trace.WriteLine($"Link quality: {rcq.LinkQuality}");
            Trace.WriteLine($"Rx rate: {rcq.RxRate} Kbps");
            Trace.WriteLine($"Tx rate: {rcq.TxRate} Kbps");
            Trace.WriteLine($"MLO connection: {rcq.IsMultiLinkOperation}");

            if (rcq.Links.Count > 0)
            {
                var link = rcq.Links[0];
                Trace.WriteLine($"RSSI: {link.Rssi}");
                Trace.WriteLine($"Frequency: {link.Frequency} MHz");
                Trace.WriteLine($"Bandwidth: {link.Bandwidth} MHz");
            }
        }
        else if (result is ActionResult.NotSupported)
        {
            (result, int rssi) = NativeWifi.GetRssi(interfaceId);
            if (result is ActionResult.Success)
            {
                Trace.WriteLine($"RSSI: {rssi}");
            }
        }
    }
}

The returned Tuple has result member and if the wireless interface is not connected, it will be ActionResult.NotConnected.

Remarks

• Creating a wireless profile from scratch is not covered in this library. It is because 1) Native WiFi does not include such functionality, 2) it requires careful consideration on wi-fi technology in use, 3) it involves sensitive security information. Thus, it is left to each user.

Release Notes

Ver 3.0.2 2025-7-5

• Fix: RadioStateChanged & SignalQualityChanged events are not prevented by ScanNetworksAsync, ConnectNetworkAsync or DisconnectNetworkAsync methods.

Ver 3.0.1 2025-7-4

• Add:
  • ScanNetworksAsync overload method for specified SSID
  • EnumerateAvailableNetworks overload method for specified wireless interface
  • EnumerateBssNetworks overload method for specified wireless interface
  • GetCurrentConnection method for specified wireless interface - This works only with connected wireless LAN.
  • GetRssi method for specified wireless interface - This works only with connected wireless LAN.
  • GetRealtimeConnetionQuality method for specified wireless interface - This works only with connected wireless LAN and only on Windows 11 24H2.
  • IsConnectable property to AvailableNetworkPack - This affects EnumerateAvailableNetworks & EnumerateAvailableNetworkGroups methods.
  • New values of CipherAlgorithm, EncryptionType, BssType enum
• Breaking change:
  • Remove: ConnectionMode & ProfileName properties from InterfaceConnectionInfo - This affects EnumerateInterfaceConnections method. If those properties are necessary, use GetCurrentConnection method.
  • Rename: OnlyDisconnectd of ScanMode enum to OnlyNotConnected
  • Rename: SignalStrength property of BssNetworkPack to Rssi - This affects EnumerateBssNetworks method.
  • Rename: GetInterfaceRadio method to GetRadio
  • Rename: TurnOnInterfaceRadio method to TurnOnRadio
  • Rename: TurnOffInterfaceRadio method to TurnOffRadio
  • Rename: IsInterfaceAutoConfig method to IsAutoConfig
  • Remove: Id property of RadioInfo - This affects GetRadio method.
  • Replace: RadioSet & PhyRadioStateInfo with RadioStateSet - This affects GetRadio method & RadioStateChangedEventArgs event args.
  • Change: Type of bssid parameter of ConnectNetwork & ConnectNetworkAsync methods

Ver 2.8 2025-5-18

• Add: ScanNetworksAsync overload methods with modes for only disconnected interfaces or only specified interfaces
• Add: RadioStateChanged, SignalQualityChanged events to instantiatable implementation

Ver 2.7.1 2025-4-10

• Fix: WPA3 Enterprise is correctly assigned.

Ver 2.7 2025-1-25

• Add & Breaking change: WPA3 authentications are re-designated, and WPA3 is removed and superseded by WPA3 Enterprise 192-bit mode as WPA3 is deprecated.

• Breaking change: .NET 6.0, 7.0 are no longer supported

Ver 2.6 2024-7-5

• Add: 6GHz channels

Ver 2.5 2023-1-9

• Add: ThrowsOnAnyFailure property to throw an exception when any failure occurs

Ver 2.4 2022-11-24

• Add: Special event args for AvailabilityChanged, InterfaceChanged, ConnectionChanged, ProfileChanged events
• Breaking change: .NET 5.0 is no longer supported.

Ver 2.3 2022-8-1

• Add: PHY types (802.11ad, ax, be)
• Add: PHY type in profile and related radio information

Ver 2.2 2022-7-25

• Add: SetProfileEapXmlUserData method to set the EAP user credentials
• Add: PHY type to BSS network
• Breaking change: .NET Framework 4.6 or older is no longer supported

Ver 2.1 2021-3-30

• Fix: GetInterfaceRadio is enabled to handle invalid capabilities information.

Ver 2.0 2021-2-4

• Add: Support for .NET 5.0 and .NET Standard 2.0

Ver 1.8 2020-12-20

• Breaking change: GetInterfaceAutoConfig method is renamed to IsInterfaceAutoConfig.

Ver 1.7 2020-9-29

• Add: WPA3 in authentication method and algorithm

Ver 1.6 2020-8-4

• Add: Functionality to connect specific access point when connecting wireless LAN

Ver 1.5 2019-12-1

• Add: Authentication/Cipher algorithms to information obtained by EnumerateAvailableNetworks & EnumerateAvailableNetworkGroups methods

Ver 1.4 2018-9-2

• Add: EnumerateInterfaceConnections, EnumerateAvailableNetworkGroups, EnumerateProfileRadios methods
• Breaking change: Radio information related to wireless profiles can be obtained by EnumerateProfileRadios instead of EnumerateProfiles.

Ver 1.0 2015-1-30

• Initial commit

License

• MIT License