VC++監控網卡狀態

一般情況下，我們只獲取網卡IP就夠了，但是今天有個需求，需要監控網卡狀態，經查找，需要使用COM技術實現，核心Class如下：

微軟在WINDOWS VISTA之后提供了一個叫NLA(Network List Manager API)的接口，用于獲取網絡狀態變化通知的一個接口。以COM技術實現。

主要導出的COM接口如下：

IEnumNetworkConnections

IEnumNetworks

INetwork

INetworkConnection

INetworkConnectionEvents

INetworkEvents

INetworkListManager

INetworkListManagerEvents

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參考Url :

1. https://msdn.microsoft.com/en-us/library/windows/desktop/aa370799(v=vs.85).aspx

2. https://www.codeproject.com/Articles/574446/Using-Network-List-Manager-Cplusplus

代碼

// Demo1.cpp : 定義控制臺應用程序的入口點。

//

#include "stdafx.h"

#include

#include

#pragma comment(lib, "ole32.lib")

class MyNetWorkEvent : public INetworkListManagerEvents

{

public:

MyNetWorkEvent() {

m_ref = 1;

}

/*

typedef enum NLM_CONNECTIVITY {

NLM_CONNECTIVITY_DISCONNECTED ? ? ? = 0x0000, // 斷開連接

NLM_CONNECTIVITY_IPV4_NOTRAFFIC ? ? = 0x0001, // 不通

NLM_CONNECTIVITY_IPV6_NOTRAFFIC ? ? = 0x0002,

NLM_CONNECTIVITY_IPV4_SUBNET ? ? ? ?= 0x0010,

NLM_CONNECTIVITY_IPV4_LOCALNETWORK ?= 0x0020,

NLM_CONNECTIVITY_IPV4_INTERNET ? ? ?= 0x0040, // 有網

NLM_CONNECTIVITY_IPV6_SUBNET ? ? ? ?= 0x0100,

NLM_CONNECTIVITY_IPV6_LOCALNETWORK ?= 0x0200,

NLM_CONNECTIVITY_IPV6_INTERNET ? ? ?= 0x0400

} NLM_CONNECTIVITY;

ConnectivityChanged: 0003 // 局域網，沒網

ConnectivityChanged: 0000 // 斷開連接

ConnectivityChanged: 0042 // 局域網，能上網

*/

virtual HRESULT STDMETHODCALLTYPE ConnectivityChanged(NLM_CONNECTIVITY newConnectivity)

{

printf("ConnectivityChanged: %04X\n", newConnectivity);

return S_OK;

}

virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppvObject)

{

HRESULT Result = S_OK;

if (IsEqualIID(riid, IID_IUnknown))

{

*ppvObject = (IUnknown *)this;

}

else if (IsEqualIID(riid, IID_INetworkListManagerEvents))

{

*ppvObject = (INetworkListManagerEvents *)this;

}

else

{

Result = E_NOINTERFACE;

}

return Result;

}

virtual ULONG STDMETHODCALLTYPE AddRef(void)

{

return (ULONG)InterlockedIncrement(&m_ref);

}

virtual ULONG STDMETHODCALLTYPE Release(void)

{

LONG Result = InterlockedDecrement(&m_ref);

if (Result == 0)

delete this;

return (ULONG)Result;

}

private:

LONG m_ref;

};

int main()

{

CoInitialize(NULL);

INetworkListManager *pNetworkListManager = NULL;

HRESULT hr = CoCreateInstance(CLSID_NetworkListManager, NULL, CLSCTX_ALL, IID_INetworkListManager, (LPVOID *)&pNetworkListManager);

printf("CLSID_NetworkListManager: %d\n", FAILED(hr));

VARIANT_BOOL bConnected = VARIANT_FALSE;

hr = pNetworkListManager->get_IsConnected(&bConnected);

printf("is Connected: %d %d\n", bConnected, FAILED(hr));

IConnectionPointContainer *pCPContainer = NULL;

hr = pNetworkListManager->QueryInterface(IID_IConnectionPointContainer, (void**)&pCPContainer);

IConnectionPoint *pConnectPoint = NULL;

hr = pCPContainer->FindConnectionPoint(IID_INetworkListManagerEvents, &pConnectPoint);

DWORD Cookie = 0;

MyNetWorkEvent* pMyEvent = new MyNetWorkEvent();

pConnectPoint->Advise((IUnknown*)pMyEvent, &Cookie);

// 必須有下面這個消息循環

MSG msg;

while (GetMessage(&msg, NULL, 0, 0))

{

TranslateMessage(&msg);

DispatchMessage(&msg);

if ( msg.message == WM_QUIT )

{

break;

}

}

pConnectPoint->Unadvise(Cookie);

pConnectPoint->Release();

pCPContainer->Release();

pNetworkListManager->Release();

system("pause");

CoUninitialize();

return 0;

}

---------------------

作者：笨笨D幸福

來源：CSDN

原文：https://blog.csdn.net/bbdxf/article/details/79002833

版權聲明：本文為博主原創文章，轉載請附上博文鏈接！

超強干貨來襲 云風專訪：近40年碼齡，通宵達旦的技術人生

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