通过设备名获取网卡Mac地址

在Windows开发开发工程中，有时不仅需要获取网卡的原来MAC地址，也需要获了取软件修改后的MAC地址。

1.首先打开注册表:

计算机\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards

枚举下面有多少个子项，获取每个子项ServiceName的键值

2.根据设备的服务名生成设备的实例名，然后打开设备，发送IOCTL_NDIS_QUERY_GLOBAL_STATS，输入参数为OID_802_3_CURRENT_ADDRESS和OID_802_3_PERMANENT_ADDRESS的参数，输出即为当前网卡的地址。

#include "stdafx.h"
#include<windows.h>
#include "Iphlpapi.h"

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

#include <TCHAR.H>
#include <winioctl.h>
#include <strsafe.h>  
#include <setupapi.h>  
#include <ntddndis.h>  
#include <algorithm>  

int main()
{
    // 网卡标识，可以在注册表下对应位置找到，本例：
    //HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards\3

    HANDLE hDev = CreateFile(L"//./{FF78525B-F695-4AB5-AEF7-E257A11C185C}",
            GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0);

    if (INVALID_HANDLE_VALUE == hDev)
    {
        printf("CreateFile err :%d", GetLastError());
        return 0;
    }

    int inBuf;
    BYTE outBuf[256] = { 0 };
    DWORD BytesReturned;

    //原生的网卡地址
    inBuf = OID_802_3_PERMANENT_ADDRESS;
    if (DeviceIoControl(hDev, IOCTL_NDIS_QUERY_GLOBAL_STATS, (LPVOID)&inBuf, 4, outBuf, 256, &BytesReturned, NULL))
    {
        char buff[512] = { 0 };
        sprintf_s(buff,512,"Real Mac Address: %02X-%02X-%02X-%02X-%02X-%02X", outBuf[0], outBuf[1], outBuf[2], outBuf[3], outBuf[4], outBuf[5]);
        printf("%s", buff);
    }

    //可能修改后的网卡地址
    inBuf = OID_802_3_CURRENT_ADDRESS;
    if (DeviceIoControl(hDev, IOCTL_NDIS_QUERY_GLOBAL_STATS, (LPVOID)&inBuf, 4, outBuf, 256, &BytesReturned, NULL))
    {
        char buff[512] = { 0 };
        sprintf_s(buff, 512, "Current Mac Address: %02X-%02X-%02X-%02X-%02X-%02X", outBuf[0], outBuf[1], outBuf[2], outBuf[3], outBuf[4], outBuf[5]);
        printf("%s", buff);
    }

    CloseHandle(hDevice);
}

3.假如本机中有多块物理网卡，可枚举注册表，生成打开设备获取。

注意：同一块网卡会因网卡驱动的安装，卸载，重复安装而变化。