Windows and Detecting Captive Portals

Question

尝试检测Captive Portal何时在互联网连接上使用，即在咖啡店连接的笔记本电脑。

尝试使用网络列表管理器COM对象实现这一点：

NETWORKLIST.NetworkListManager _networkListManager = new NetworkListManager();
foreach (INetworkConnection net in _networkListManager.GetNetworkConnections())
{                
    if (net.GetConnectivity().HasFlag(NLM_CONNECTIVITY.NLM_CONNECTIVITY_IPV4_INTERNET) == true)
      {
           // Check if we are connected by a captive web portal
           // using NLM_INTERNET_CONNECTIVITY_WEBHIJACK
      }                                
 }

根据此处的文档：http://msdn.microsoft.com/en-us/library/windows/desktop/aa370750（v=vs.85）.aspx

"这些连接标志可以通过使用INetwork或INetworkConnection接口的IPropertyBag接口查询NA_InternetConnectivityV4或NA_Internet ConnectivityV6属性来检索"

我似乎不存在NA_InternetConnectivityV4枚举（实现不完整），或者我不知道如何使用它们。

有人真的使用过这个吗？或者有人对检测何时使用圈养门户有想法吗？

Answer 1

这不是C#，但我发现那些API在C++上工作

pNetworkListManager->GetNetworks（NLM_ENUM_NETWORK_CONNECTED，&pEnum）INetwork*pINetwork；

//Should actually loop through the possible networks.
HRESULT hr = pEnum->Next(1, &pINetwork, nullptr);
IPropertyBag *pNetworkPropertyBag;
HRESULT hrQueryInterface = pINetwork->QueryInterface(IID_IPropertyBag, (LPVOID*)&pNetworkPropertyBag);
if (SUCCEEDED(hrQueryInterface 1) && pNetworkPropertyBag != nullptr)
{
    NLM_CONNECTIVITY networkConnectivity;
    VARIANT variantConnectivity;
    if (SUCCEEDED(pINetwork->GetConnectivity(&networkConnectivity)))
    {
        if ((networkConnectivity & 
        NLM_CONNECTIVITY_IPV4_INTERNET) == NLM_CONNECTIVITY_IPV4_INTERNET)
        {
            VariantInit(&variantConnectivity);
            if (SUCCEEDED(pNetworkPropertyBag->Read(NA_InternetConnectivityV4, &variantConnectivity, nullptr)) && (V_UINT(&variantConnectivity) & NLM_INTERNET_CONNECTIVITY_WEBHIJACK) == NLM_INTERNET_CONNECTIVITY_WEBHIJACK)
            {
                //Captive Portal detected
            }
            VariantClear(&variantConnectivity);
    }
}

查看此项以了解详细信息：http://www.codeproject.com/Articles/1088221/Captive-Portal-Detection-with-Windows-APIs

Answer 2

关闭此项，调查显示NA_InternetConnectivityV4枚举不存在，MSDN文档不正确。