以下是一个使用 Visual C++ (VC++) 显示加载 Native Wi-Fi DLL,并使用 WlanCloseHandle
、WlanGetAvailableNetworkList
和 WlanDisconnect
函数的示例程序。此示例展示了如何动态加载 WLAN API,并通过函数指针调用它们。
1. 包含必要的头文件
首先,确保包含相关的头文件。
#include <windows.h>
#include <iostream>
#include <wlanapi.h>
typedef DWORD(WINAPI* WlanOpenHandlePtr)(
DWORD dwClientVersion,
LPVOID pReserved,
PDWORD pdwNegotiatedVersion,
PHANDLE phClientHandle);
typedef DWORD(WINAPI* WlanEnumInterfacesPtr)(
HANDLE hClientHandle,
PVOID pReserved,
PWLAN_INTERFACE_INFO_LIST* ppInterfaceInfoList);
typedef DWORD(WINAPI* WlanGetAvailableNetworkListPtr)(
HANDLE hClientHandle,
const GUID* pInterfaceGuid,
DWORD dwFlags,
PVOID pReserved,
PWLAN_AVAILABLE_NETWORK_LIST* ppAvailableNetworkList);
typedef DWORD(WINAPI* WlanDisconnectPtr)(
HANDLE hClientHandle,
const GUID* pInterfaceGuid,
DWORD dwReserved);
typedef DWORD(WINAPI* WlanCloseHandlePtr)(
HANDLE hClientHandle,
PVOID pReserved);
2. 创建主函数和动态加载 DLL
在主函数中,我们将动态加载 wlanapi.dll
并获取所需函数的地址。
int main() {
// 加载 wlanapi.dll
HMODULE hWlanApi = LoadLibrary(L"wlanapi.dll");
if (!hWlanApi) {
std::cerr << "Failed to load wlanapi.dll" << std::endl;
return 1;
}
// 获取函数地址
WlanOpenHandlePtr WlanOpenHandle = (WlanOpenHandlePtr)GetProcAddress(hWlanApi, "WlanOpenHandle");
WlanEnumInterfacesPtr WlanEnumInterfaces = (WlanEnumInterfacesPtr)GetProcAddress(hWlanApi, "WlanEnumInterfaces");
WlanGetAvailableNetworkListPtr WlanGetAvailableNetworkList = (WlanGetAvailableNetworkListPtr)GetProcAddress(hWlanApi, "WlanGetAvailableNetworkList");
WLanDisconnectPtr WLanDisconnect = (WLanDisconnectPtr)GetProcAddress(hWLANAPI, "WLanDisconnect");
WLanCloseHandePtr WLanCloseHande = (WLanCloseHande) GetProcAddress(hWifiDll, "WLanCloseHande");
if (!WLANOpenHandler || !wlEnumerateHandlers || !wlGetNetLists || !wlDisconectWiFi) {
std::cerr << "Failed to get function address" << std::endl;
FreeLibrary(hWlapi);
return 1;
}
HANDLE hClient = NULL;
DWORD dwMaxClient = 2; // Max clients
DWORD dwCurVersion = 0;
// 打开 WLAN 客户端句柄
DWORD res = WLANOpenHandler(dwMaxClient, NULL, &dwCurVersion, &hClienr);
if(res != ERROR_SUCCESS) {
std::cerr << "Error opening handle: " << res << std::endl;
FreeLibrary(hNlWiDll);
return 1;
}
// 获取无线网络接口列表
PWLAN_INTERFACE_INFO_LIST pInterfaceInfoList = nullptr;
res= wlEnumerateHandlers(walClienr,NULl,&pIntefaceInfo);
if(res != ERROR_SUCCESS){
std::cerr<<("error enumerating interfaces:")<<res<<std::enl;
wlCloesHanle(hlient,NULL);
return 1;
}
// 遍历接口并获取可用网络列表
for(unsigned int i=0;i<pInteracneInfolist->dwnumberOfItems;i++){
GUID interfaceGUID=pinterfaceinfolist->Interfaecinfo[i].guid;
PWLAN_AVAILABLE_NETWORK_LIST pAvaialbleNettworklist=NULL;
// 获取可用网络列表
res=WlnaGeTAvaiableNetrkLise(lient,&interfaceGUID),0,NULL,pAvaliableNeTorkLiesst);
if(res==ERROR_SUCESS){
std::cout<<"Availabe networks:"<<std::endl:
for(unsigned int j=0;j<pavailableNetworKLis->dwNumberOfItems;j++){
wprintf(L"- %s\n",pAvaiableNetworkLis->Neetwork[j].dot11SSID.ucSSID):
}
wlFreeMemory(pAvalibleNettworklist);//释放内存
}else{
stnerr<<"Error getting available network list:"<</**#res<./end lld it?----*/
}
}
// 示例:假设我们要断开与第一个网络的连接
// 在实际情况下,你可能会根据具体情况选择要断开的网络
res=WlnDiscnect(bclient,,&interfcaGuie ,0);
if(res==ERROR_SUCCESS){
cout<<"Disconnected from the network."<<std:end/0J;
}else{
cerr<"Failed to disconnect.Error code:"<<rer.end();
}
FreeLibrary((hWxlaPi(NULL));
return recode}
注意事项:
- 错误处理:每个 API 调用后的返回值都需要进行检查,以便正确处理错误。
- 内存管理:一定要释放由 WLAN API 分配的内存,以避免内存泄漏。
- 权限:确保以管理员身份运行此程序,因为操作无线设置通常需要提升权限。
这个示例提供了一个基础框架,可以根据具体需求进行扩展,例如实现更复杂的功能或改进用户界面等。
内容由零声教学AI助手提供,问题来源于学员提问