struktur WLAN_REALTIME_CONNECTION_QUALITY (wlanapi.h)

Artikel
03/16/2024

Penting

Beberapa informasi berkaitan dengan produk prarilis yang mungkin dimodifikasi secara substansial sebelum dirilis secara komersial. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.

Mewakili atribut yang menjelaskan kualitas koneksi pada antarmuka tertentu.

Sintaks

typedef struct _WLAN_REALTIME_CONNECTION_QUALITY {
  DOT11_PHY_TYPE                             dot11PhyType;
  ULONG                                      ulLinkQuality;
  ULONG                                      ulRxRate;
  ULONG                                      ulTxRate;
  BOOL                                       bIsMLOConnection;
  ULONG                                      ulNumLinks;
  WLAN_REALTIME_CONNECTION_QUALITY_LINK_INFO linksInfo[1];
} WLAN_REALTIME_CONNECTION_QUALITY, *PWLAN_REALTIME_CONNECTION_QUALITY;

Anggota

dot11PhyType

Nilai DOT11_PHY_TYPE yang menunjukkan jenis fisik asosiasi.

ulLinkQuality

Nilai persentase ULONG yang mewakili kualitas sinyal koneksi. Anggota ini berisi nilai antara 0 dan 100. Nilai 0 menyiratkan kekuatan sinyal RSSI aktual -100 dbm. Nilai 100 menyiratkan kekuatan sinyal RSSI aktual -50 dbm. Anda dapat menghitung nilai kekuatan sinyal RSSI untuk nilai ulLinkQuality antara 1 dan 99 menggunakan interpolasi linier.

ulRxRate

Berisi tingkat penerimaan asosiasi.

ulTxRate

Berisi tingkat transmisi asosiasi.

bIsMLOConnection

Mewakili apakah ini adalah koneksi Operasi Multi-Tautan (MLO).

ulNumLinks

Jumlah tautan yang tersambung.

linksInfo[1]

WLAN_REALTIME_CONNECTION_QUALITY_LINK_INFOukuran ulNumLinks. Setiap elemen berisi informasi tentang tautan terhubung yang berbeda.

Keterangan

Contoh

DWORD IsWLANLinkSpeedSufficient(
    GUID* interfaceGuid,
    const ULONG minRequiredLinkQuality,
    const ULONG requiredRxRate,
    const ULONG requiredTxRate,
    bool* isSufficient)
{
    wil::unique_wlan_handle clientHandle;
    DWORD maxClientVersion = 2;
    DWORD currentClientVersion = 0;
    DWORD result = WlanOpenHandle(maxClientVersion, nullptr, &currentClientVersion, &clientHandle);
    if (result != ERROR_SUCCESS) 
    {
        wprintf(L"WlanOpenHandle failed with error: %u\n", result);
        return result;
    }

    DWORD connectionQualitySize = 0;
    wil::unique_wlan_ptr<WLAN_REALTIME_CONNECTION_QUALITY> connectionQuality;
    result = WlanQueryInterface(
        clientHandle.get(), 
        interfaceGuid,
        wlan_intf_opcode_realtime_connection_quality,
        nullptr,
        &connectionQualitySize,
        wil::out_param_ptr<void**>(connectionQuality),
        nullptr);
    if (result != ERROR_SUCCESS) 
    {
        wprintf(L"WlanQueryInterface failed with error: %u\n", result);
        return result;
    }

    if (connectionQuality->ulLinkQuality < minRequiredLinkQuality || 
        connectionQuality->ulRxRate < requiredRxRate ||
        connectionQuality->ulTxRate < requiredTxRate)
    {
        *isSufficient = false;
    }
    else
    {
        *isSufficient = true;
    }
    return ERROR_SUCCESS;
}

DWORD GetCenterChannelFrequencyOfLinkWithBestRSSI(GUID* interfaceGuid, ULONG* channelFrequency)
{
    wil::unique_wlan_handle clientHandle;
    DWORD maxClientVersion = 2;
    DWORD currentClientVersion = 0;
    DWORD result = WlanOpenHandle(maxClientVersion, nullptr, &currentClientVersion, &clientHandle);
    if (result != ERROR_SUCCESS) 
    {
        wprintf(L"WlanOpenHandle failed with error: %u\n", result);
        return result;
    }

    DWORD connectionQualitySize = 0;
    wil::unique_wlan_ptr<WLAN_REALTIME_CONNECTION_QUALITY> connectionQuality;
    result = WlanQueryInterface(
        clientHandle.get(), 
        interfaceGuid,
        wlan_intf_opcode_realtime_connection_quality,
        nullptr,
        &connectionQualitySize,
        wil::out_param_ptr<void**>(connectionQuality),
        nullptr);
    if (result != ERROR_SUCCESS) 
    {
        wprintf(L"WlanQueryInterface failed with error: %u\n", result);
        return result;
    }

    auto linkWithBestRssi = std::min_element(
        connectionQuality->linksInfo,
        connectionQuality->linksInfo + connectionQuality->ulNumLinks,
        [](const WLAN_REALTIME_CONNECTION_QUALITY_LINK_INFO& lhs, const WLAN_REALTIME_CONNECTION_QUALITY_LINK_INFO& rhs) {
            return lhs.lRssi > rhs.lRssi; // `Greater than` because RSSI is negative.
        });

    *channelFrequency = linkWithBestRssi->ulChannelCenterFrequencyMhz;
    return ERROR_SUCCESS;
}

Persyaratan

Persyaratan	Nilai
Header	wlanapi.h

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