Get the MACAddress from the computer

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akayoku - 23 Jun 2005 07:19 GMT

Hello all,

I'm working on a school project to make a security program. I need to
get the MAC Address from the computer. That is the "Physical Address"
when you type "ipconfig/all" in MSDOS command prompt.

It is urgent and I have spent pretty much time there, but still don't
know what to do. I am an amateur in programming. I'd greatly appreciate
your opinion. Thanks.

~~~ Landy

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Jochen Kalmbach [MVP] - 23 Jun 2005 07:26 GMT

Hi akayoku!

> I'm working on a school project to make a security program. I need to
> get the MAC Address from the computer. That is the "Physical Address"
> when you type "ipconfig/all" in MSDOS command prompt.

See: How To Get the MAC Address for an Ethernet Adapter
http://support.microsoft.com/kb/118623/en-us

Or try this one:

<code>
CString GetMACAddress(int adapternumber)
{
int nAdapterCount = 0;
ULONG ip;
ULONG buflen;
PIP_ADAPTER_INFO pAdInfo = NULL;
PIP_ADAPTER_INFO pAdInfo_c = NULL;

buflen = 0;
GetAdaptersInfo(pAdInfo, &buflen); //since buflen=0, buffer is
// too small. function returns required buffersize in buflen.
pAdInfo = (struct _IP_ADAPTER_INFO *)new UCHAR[buflen+1];
pAdInfo_c = pAdInfo;
if (GetAdaptersInfo(pAdInfo, &buflen) == ERROR_SUCCESS)
{
do
{
ip = inet_addr(pAdInfo->IpAddressList.IpAddress.String);
if ((ip != 0)&&(ip != 0x7f000001))
{
nAdapterCount++;
if ((nAdapterCount == adapternumber)||(adapternumber == 0))
{
if (pAdInfo->AddressLength != 0)
{
CString macstr;
for (int i = 0; i < (int)pAdInfo->AddressLength; i++)
{
CString temp;
temp.Format(_T(" %02X"), pAdInfo->Address[i]);
macstr += temp;
}
delete pAdInfo;
return macstr;
}
}
}
} while ((pAdInfo->Next != NULL)&&((pAdInfo = pAdInfo->Next) !=
pAdInfo));
}
delete pAdInfo_c;
return _T("");
}
</code>

Signature

Greetings
Jochen

My blog about Win32 and .NET
http://blog.kalmbachnet.de/

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German - 06 Jul 2005 17:26 GMT

I have tried with the code, but I have received the next mesage :

error C2065: 'PIP_ADAPTER_INFO' : undeclared identifier

After that, I added #include Iphlpapi.h with no result !!
Do you have any other suggestion ??
Thanks in advanced,

German
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

> Hi akayoku!
> > I'm working on a school project to make a security program. I need to
[quoted text clipped - 51 lines]
> }
> </code>

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Pavel A. - 23 Jun 2005 12:27 GMT

> Hello all,
>
[quoted text clipped - 5 lines]
> know what to do. I am an amateur in programming. I'd greatly appreciate
> your opinion. Thanks.

> ~~~ Landy

Hi,
since this is a school project and you don't have much time,
IMHO you can quite well spawn ipconfig and parse it's output.
Also, instead of ipconfig, you can use :
netsh interface ip show config

So, the task is reduced to using system(...) and trivial scanning of text
file.

/* A real "commercial strength" solution won't use anything dependent on
TCPIP, because IP protocol driver may be just not bound to your ethernet card

Also it won't be fooled by "overriding" the built-in MAC address :))
Probably it will use WMI or low-level NDIS ioctls. */

Good luck,
--PA

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Get the MACAddress from the computer

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