需求
需要对某个网卡进行配置，比如设置DNS、IP地址或者WINS Server。前两个可以分别用注册表和CreateUnicastIpAddressEntry来做。但是后面那个，根本找不到对应的API。搜索了半天，发现要么是C#的示例，要么是PowerShell的示例，唯独没有C++示例。就算是有C++示例，最多也是查询的，没有设置的。我对COM组件的使用并不是很熟悉，感觉用起来很麻烦。后面又搜索了半天，如何调用Object中的函数。终于找到了方法，直接上代码
示例代码
目标
- 设置某一个Network Adapter的WINS Server
参考链接
- SetWINSServer 微软文档
- Calling Instance Methods in WMI 只有代码片段，有些指针不知从何而来
- Using WMI to call method on objects 完整的代码，但并没有如何调用带参数的函数的方法
- 2 和 3 结合起来，我就写出能用的代码了，不容易~~
代码
#include
#include
#include
#include
#include
#include
#pragma comment(lib, "comsuppw.lib")
#pragma comment(lib, "wbemuuid.lib")
int main(int argc, char * argv[]) {
HRESULT hres;
// Step 1: --------------------------------------------------
// Initialize COM. ------------------------------------------
do {
hres = CoInitializeEx(0, COINIT_MULTITHREADED);
if (FAILED(hres)) {
break;
}
// Step 2: --------------------------------------------------
// Set general COM security levels --------------------------
hres = CoInitializeSecurity(
NULL,
-1, // COM authentication
NULL, // Authentication services
NULL, // Reserved
RPC_C_AUTHN_LEVEL_DEFAULT, // Default authentication
RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation
NULL, // Authentication info
EOAC_NONE, // Additional capabilities
NULL // Reserved
);
if (hres != S_OK && hres != RPC_E_TOO_LATE) {
break;
}
// Step 3: ---------------------------------------------------
// Obtain the initial locator to WMI -------------------------
IWbemLocator *pLoc = NULL;
hres = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID *)&pLoc);
if (FAILED(hres)) {
CoUninitialize();
break;
}
// Step 4: -----------------------------------------------------
// Connect to WMI through the IWbemLocator::ConnectServer method
IWbemServices *pService = NULL;
// Connect to the root\cimv2 namespace with
// the current user and obtain pointer pSvc
// to make IWbemServices calls.
hres = pLoc->ConnectServer(
_bstr_t(L"ROOT\\CIMV2"), // Object path of WMI namespace
NULL, // User name. NULL = current user
NULL, // User password. NULL = current
0, // Locale. NULL indicates current
NULL, // Security flags.
0, // Authority (for example, Kerberos)
0, // Context object
&pService // pointer to IWbemServices proxy
);
if (FAILED(hres)) {
pLoc->Release();
CoUninitialize();
break;
}
// Step 5: --------------------------------------------------
// Set security levels on the proxy -------------------------
hres = CoSetProxyBlanket(
pService, // Indicates the proxy to set
RPC_C_AUTHN_WINNT, // RPC_C_AUTHN_xxx
RPC_C_AUTHZ_NONE, // RPC_C_AUTHZ_xxx
NULL, // Server principal name
RPC_C_AUTHN_LEVEL_CALL, // RPC_C_AUTHN_LEVEL_xxx
RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx
NULL, // client identity
EOAC_NONE // proxy capabilities
);
if (FAILED(hres)) {
pService->Release();
pLoc->Release();
CoUninitialize();
break; // Program has failed.
}
// Step 6: --------------------------------------------------
// Use the IWbemServices pointer to make requests of WMI ----
// For example, get the name of the operating system
IEnumWbemClassObject* pEnumerator = NULL;
hres = pService->ExecQuery(
bstr_t("WQL"),
bstr_t("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE index = 1"),
WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
NULL,
&pEnumerator);
if (FAILED(hres)) {
pService->Release();
pLoc->Release();
CoUninitialize();
break; // Program has failed.
}
// Step 7: -------------------------------------------------
// Get the data from the query in step 6 -------------------
IWbemClassObject *config = NULL;
IWbemClassObject *pclsObj = NULL;
IWbemClassObject *params = NULL;
IWbemClassObject *paramsInst = NULL;
ULONG uReturn = 0;
while (pEnumerator) {
HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);
if (0 == uReturn) {
break;
}
pService->GetObject(_bstr_t(L"Win32_NetworkAdapterConfiguration"), 0, NULL, &config, NULL);
config->GetMethod(_bstr_t("SetWINSServer"), 0, ¶ms, NULL);
//pclsObj->GetMethod(_bstr_t(L"SetWINSServer"), 0, ¶ms, NULL);
params->SpawnInstance(0, ¶msInst);
_bstr_t paramValue1(L"8.8.8.8");
_bstr_t paramValue2(L"6.6.6.6");
VARIANT paramVt;
paramVt.vt = VT_BSTR;
paramVt.bstrVal = paramValue1;
paramsInst->Put(L"WINSPrimaryServer", 0, ¶mVt, NULL);
paramVt.bstrVal = paramValue2;
paramsInst->Put(L"WINSSecondaryServer", 0, ¶mVt, NULL);
VARIANT vtPath;
VariantInit(&vtPath);
pclsObj->Get(L"__PATH", 0, &vtPath, NULL, NULL);
// Execute the SetWINSServer method on our object instance
IWbemClassObject *results = NULL;
if (!FAILED(pService->ExecMethod(vtPath.bstrVal, _bstr_t(L"SetWINSServer"), 0, NULL, paramsInst, &results, NULL))) {
VARIANT vtRet;
VariantInit(&vtRet);
if (!FAILED(results->Get(L"ReturnValue", 0, &vtRet, NULL, 0))) {
printf("%d\n", vtRet.uintVal);
}
VariantClear(&vtRet);
results->Release();
}
pclsObj->Release();
}
pService->Release();
pLoc->Release();
pEnumerator->Release();
CoUninitialize();
} while (false);
return 0;
}