獲取網絡卡的MAC地址的方法很多，如：Netbios，SNMP，GetAdaptersInfo等。經過測試發現 Netbios 方法在網線拔出的情況下獲取不到MAC，而 SNMP 方法有時會獲取多個重複的網絡卡的MAC，試來試去還是 GetAdaptersInfo 方法比較好，網線拔出的情況下可以獲取MAC，而且很準確，不會重複獲取網絡卡。 

    GetAdaptersInfo 方法也不是十全十美，也存在些問題：

    1）如何區分物理網絡卡和虛擬網絡卡；

    2）如何區分無線網絡卡和有線網絡卡；

    3）“禁用”的網絡卡獲取不到。

    關於問題1和問題2我的處理辦法是：

    區分物理網絡卡和虛擬網絡卡：pAdapter->Description中包含"PCI"是：物理網絡卡。（試了3臺機器可以）

    區分無線網絡卡和有線網絡卡：pAdapter->Type為71的是：無線網絡卡。（試了2個無線網絡卡也可以）

#include"stdafx.h" #include"iphlpapi.h" #pragma comment(lib,"Iphlpapi.lib") int main(int argc,char*argv[]) { PIP_ADAPTER_INFO pAdapterInfo; PIP_ADAPTER_<mce:script type="text/javascript" src="http://hi.images.csdn.net/js/blog/tiny_mce/themes/advanced/langs/zh.js" mce_src="http://hi.images.csdn.net/js/blog/tiny_mce/themes/advanced/langs/zh.js"></mce:script><mce:script type="text/javascript" src="http://hi.images.csdn.net/js/blog/tiny_mce/plugins/syntaxhl/langs/zh.js" mce_src="http://hi.images.csdn.net/js/blog/tiny_mce/plugins/syntaxhl/langs/zh.js"></mce:script>INFO pAdapter=NULL; DWORD dwRetVal=0; pAdapterInfo=(IP_ADAPTER_INFO*)malloc(sizeof(IP_ADAPTER_INFO)); ULONG ulOutBufLen=sizeof(IP_ADAPTER_INFO); if (GetAdaptersInfo(pAdapterInfo,&ulOutBufLen)!=ERROR_SUCCESS) 　　{ 　　GlobalFree(pAdapterInfo); pAdapterInfo=(IP_ADAPTER_INFO*)malloc(ulOutBufLen); } if((dwRetVal=GetAdaptersInfo(pAdapterInfo,&ulOutBufLen))==NO_ERROR) { pAdapter=pAdapterInfo; while(pAdapter) { if(strstr(pAdapter->Description,"PCI")>0//pAdapter->Description中包含"PCI"為：物理網絡卡 ||pAdapter->Type==71//pAdapter->Type是71為：無線網絡卡 ) { printf("------------------------------------------------------------/n"); printf("AdapterName:%s/n",pAdapter->AdapterName); printf("AdapterDesc:%s/n",pAdapter->Description); printf("AdapterAddr:"); for(UINT i=0;i<pAdapter->AddressLength;i++) { printf("%02X%c",pAdapter->Address[i], i==pAdapter->AddressLength-1?'/n':'-'); } printf("AdapterType:%d/n",pAdapter->Type); printf("IPAddress:%s/n",pAdapter->IpAddressList.IpAddress.String); printf("IPMask:%s/n",pAdapter->IpAddressList.IpMask.String); } pAdapter=pAdapter->Next; } } else { printf("CalltoGetAdaptersInfofailed.n"); } return 0; }

另一個

#include "stdafx.h" #include "Lmwksta.h" #include "Lmapibuf.h" #include "Lm.h" #pragma comment(lib, "Netapi32.lib") unsigned int GetMACaddress(char strAddress[], unsigned int max) { unsigned char MACData[8]; char addr[20]; // Allocate data structure for MAC (6 bytes needed) unsigned int nCount = 0; WKSTA_TRANSPORT_INFO_0 *pwkti; // Allocate data structure for Netbios 　　DWORD dwEntriesRead; 　　DWORD dwTotalEntries; BYTE *pbBuffer; // Get MAC address via NetBios's enumerate function NET_API_STATUS dwStatus = NetWkstaTransportEnum( NULL, // [in] server name 0, // [in] data structure to return &pbBuffer, // [out] pointer to buffer MAX_PREFERRED_LENGTH, // [in] maximum length &dwEntriesRead, // [out] counter of elements actually enumerated &dwTotalEntries, // [out] total number of elements that could be enumerated NULL); // [in/out] resume handle // ASSERT(dwStatus == NERR_Success); pwkti = (WKSTA_TRANSPORT_INFO_0 *)pbBuffer; // type cast the buffer for(DWORD i=1; i< dwEntriesRead && nCount <= max; i++) // first address is 00000000, skip it { // enumerate MACs and print swscanf((wchar_t *)pwkti[i].wkti0_transport_address, L"%2hx%2hx%2hx%2hx%2hx%2hx", &MACData[0], &MACData[1], &MACData[2], &MACData[3], &MACData[4], &MACData[5]); sprintf(addr,"%02X-%02X-%02X-%02X-%02X-%02X", MACData[0], MACData[1], MACData[2], MACData[3], MACData[4], MACData[5]); if(!strcmp(addr,_T("00-00-00-00-00-00"))) continue; strcpy(&strAddress[nCount],addr); nCount+=16; } // Release pbBuffer allocated by above function dwStatus = NetApiBufferFree(pbBuffer); // ASSERT(dwStatus == NERR_Success); return nCount; } void main() { char strA[20]; GetMACaddress(strA,1); }