編程實現啟用禁用網卡

/*****************************************************************************
示範如何編程實現啟用禁用網卡
Mady By ZwelL
2004.7.29
zwell@sohu.com
*****************************************************************************/
#include <windows.h>
#include <setupapi.h>
#include <tchar.h>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib")
#pragma comment(lib,"setupapi.lib")

BOOL DisableNetInterface(bool bStatus)
{
    IN LPTSTR HardwareId ;
    //硬體ComponentId，註冊表地址：system/currentcontrolset/class/{4D36E972-E325-11CE-BFC1-08002BE10318}/0000
    
    HardwareId="PCI//VEN_10EC&DEV_8139&SUBSYS_813910EC" ;
    
    DWORD NewState ;
    
    if(bStatus)
    {
        NewState=DICS_DISABLE ;
        //禁用
    }
    else
    {
        NewState=DICS_ENABLE ;
        //啟用
    }
    
    //調用ddk函數，來禁用網卡
    
    DWORD i,err ;
    BOOL Found=false ;
    
    HDEVINFO hDevInfo ;
    SP_DEVINFO_DATA spDevInfoData ;
    
    //訪問系統的硬體庫
    hDevInfo=SetupDiGetClassDevs(NULL,"PCI",NULL,DIGCF_ALLCLASSES|DIGCF_PRESENT);
    if(hDevInfo==INVALID_HANDLE_VALUE)
    {
        printf("訪問系統硬體出錯！");
        return false ;
    }
    
    //枚舉硬體，獲得需要的介面
    spDevInfoData.cbSize=sizeof(SP_DEVINFO_DATA);
    for(i=0;SetupDiEnumDeviceInfo(hDevInfo,i,&spDevInfoData);i++)
    {
        DWORD DataT ;
        LPTSTR p,buffer=NULL ;
        DWORD buffersize=0 ;
        
        //獲得硬體的屬性值
        while(!SetupDiGetDeviceRegistryProperty(
    hDevInfo,
    &spDevInfoData,
    SPDRP_HARDWAREID,
    &DataT,
    (PBYTE)buffer,
    buffersize,
    &buffersize))
        {
            if(GetLastError()==ERROR_INVALID_DATA)
            {
                //不存在HardwareID. Continue.
                break ;
            }
            else if(GetLastError()==ERROR_INSUFFICIENT_BUFFER)
            {
                //buffer size不對.
                if(buffer)
                LocalFree(buffer);
                buffer=(char*)LocalAlloc(LPTR,buffersize);
            }
            else
            {
                //未知錯誤
                goto cleanup_DeviceInfo ;
            }
        }
        
        if(GetLastError()==ERROR_INVALID_DATA)
        continue ;
        
        //比較，找到和網卡ID相同的項
        for(p=buffer;*p&&(p<&buffer[buffersize]);p+=lstrlen(p)+sizeof(TCHAR))
        {
            
            if(!_tcscmp(HardwareId,p))
            {
                //找到網卡
                Found=TRUE ;
                break ;
            }
        }
        
        if(buffer)
        LocalFree(buffer);
        
        //如果相等
        if(Found)
        {
            //禁用該裝置
            
            SP_PROPCHANGE_PARAMS spPropChangeParams ;
            
            spPropChangeParams.ClassInstallHeader.cbSize=sizeof(SP_CLASSINSTALL_HEADER);
            spPropChangeParams.ClassInstallHeader.InstallFunction=DIF_PROPERTYCHANGE ;
            spPropChangeParams.Scope=DICS_FLAG_GLOBAL ;
            spPropChangeParams.StateChange=NewState ;
            //禁用：DICS_DISABLE，DICS_ENABLE啟用
            
            //
            if(!SetupDiSetClassInstallParams(hDevInfo,&spDevInfoData,(SP_CLASSINSTALL_HEADER*)&spPropChangeParams,sizeof(spPropChangeParams)))
            {
                DWORD errorcode=GetLastError();
            }
            
            if(!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE,hDevInfo,&spDevInfoData))
            {
                DWORD errorcode=GetLastError();
            }
            
            switch(NewState)
            {
                case DICS_DISABLE :
     printf("成功禁用網路！");
                break ;
                case DICS_ENABLE :
     printf("成功啟用網路！");
                break ;
            }
            
            break ;
        }
        
    }
    
    //退出時，清理工作環境
    cleanup_DeviceInfo :
    err=GetLastError();
    SetupDiDestroyDeviceInfoList(hDevInfo);
    SetLastError(err);
    
    return true ;
}

void usage(char *exefile)
{
printf("Usage:%s [-e|-d]/r/n", exefile);
printf("/t-e: Enable the network card./r/n");
printf("/t-d: Disable the network card./r/n");
exit(0);
}

int main(int argc,char**argv)
{
if(argc<2)
  usage(argv[0]);
if(!DisableNetInterface((strstr(argv[1],"-d")>0?TRUE:FALSE)))
  printf("對網卡操作失敗!");
    return 0;
}
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