Узнать MAC Address ethernet

#include "A_MySQL.h"
#include <winsock2.h>
#include <iphlpapi.h>
#pragma comment(lib, "iphlpapi.lib")
 
void AA_MySQL::MacAdress(FString& addr)
{
        PIP_ADAPTER_INFO AdapterInfo;
        DWORD dwBufLen = sizeof(IP_ADAPTER_INFO);
        char* mac_addr = (char*)malloc(18);
 
        AdapterInfo = (IP_ADAPTER_INFO*)malloc(sizeof(IP_ADAPTER_INFO));
        if (AdapterInfo == NULL) {
            printf("Error allocating memory needed to call GetAdaptersinfo\n");
            free(mac_addr);
        }
 
        if (GetAdaptersInfo(AdapterInfo, &dwBufLen) == ERROR_BUFFER_OVERFLOW) {
            free(AdapterInfo);
            AdapterInfo = (IP_ADAPTER_INFO*)malloc(dwBufLen);
            if (AdapterInfo == NULL) {
                printf("Error allocating memory needed to call GetAdaptersinfo\n");
                free(mac_addr);
            }
        }
 
        if (GetAdaptersInfo(AdapterInfo, &dwBufLen) == NO_ERROR) {
            PIP_ADAPTER_INFO pAdapterInfo = AdapterInfo;
            do {
                    sprintf(mac_addr, "%02X:%02X:%02X:%02X:%02X:%02X",
                    pAdapterInfo->Address[0], pAdapterInfo->Address[1],
                    pAdapterInfo->Address[2], pAdapterInfo->Address[3],
                    pAdapterInfo->Address[4], pAdapterInfo->Address[5]);
                pAdapterInfo = pAdapterInfo->Next;
            } while (pAdapterInfo);
        }
        free(AdapterInfo);
        addr = mac_addr;
}