Получение адресов NIC

В окнах вы можете использовать функцию GetAdaptersAddresses, чтобы получить физический адрес.

std::string ConvertPhysicalAddressToString(BYTE* p_Byte, int iSize)
{
string strRetValue;

char cAux[3];
for(int i=0; i<iSize; i++)
{
sprintf_s(cAux,"%02X", p_Byte[i]);
strRetValue.append(cAux);
if(i < (iSize - 1))
strRetValue.append("-");
}

return strRetValue;
}

void GetEthernetDevices(std::vector<std::string> &vPhysicalAddress)
{
// Call the Function with 0 Buffer to know the size of the buffer required
unsigned long ulLen = 0;
IP_ADAPTER_ADDRESSES* p_adapAddress = NULL;
if(GetAdaptersAddresses(AF_INET, 0, NULL, p_adapAddress,&ulLen) == ERROR_BUFFER_OVERFLOW)
{
p_adapAddress = (PIP_ADAPTER_ADDRESSES)malloc(ulLen);
if(p_adapAddress)
{
DWORD dwRetValue = GetAdaptersAddresses(AF_INET, 0, NULL, p_adapAddress,&ulLen);
if(dwRetValue == NO_ERROR)
{
IP_ADAPTER_ADDRESSES* p_adapAddressAux = p_adapAddress;
do
{
// Only Ethernet
if(p_adapAddressAux->IfType == IF_TYPE_ETHERNET_CSMACD)
vPhysicalAddress.push_back(ConvertPhysicalAddressToString(p_adapAddress->PhysicalAddress, p_adapAddress->PhysicalAddressLength));

p_adapAddressAux = p_adapAddressAux->Next;
}
while(p_adapAddressAux != NULL);
}
free(p_adapAddress);
}
}
}int _tmain(int argc, _TCHAR* argv[])
{
std::vector<std::string> vPhysicalAddress;
GetEthernetDevices(vPhysicalAddress);
}