C / C++ / MFC

12-Dec-09 4:57

HI!
I can't get MAC by GetAdaptersAddresses .
Here is the code:

void CGetAdepterInfoDlg::GetInfo(void)
{
    PIP_ADAPTER_ADDRESSES pAddresses;
    pAddresses = new IP_ADAPTER_ADDRESSES;
    ULONG outBufLen = 0;
    DWORD dwRetVal = 0;

    if (GetAdaptersAddresses(AF_INET, 0, NULL, pAddresses, &outBufLen) == ERROR_BUFFER_OVERFLOW) 
    {
        delete pAddresses;
        pAddresses = (IP_ADAPTER_ADDRESSES*) malloc(outBufLen);
    }

    if ((dwRetVal = GetAdaptersAddresses(AF_INET, 0,  NULL,  pAddresses, &outBufLen)) == NO_ERROR)
    {
        while (pAddresses)
        {
            if (pAddresses->PhysicalAddressLength != 0) 
            {
                CString sm;
                sm.Format(_T("%x"),pAddresses->PhysicalAddress);
                this->MessageBox(sm);//Why it always return "0"?
            }
            pAddresses = pAddresses->Next;
        }
    }
}

void CGetAdepterInfoDlg::OnBnClickedButton1()//here is the event of a button
{
    this->GetInfo();
}

THANKS!
David

modified on Saturday, December 12, 2009 11:47 AM

DavidBrother12-Dec-09 5:27

12-Dec-09 5:27

Give me a hand please! Frown | :(

Richard MacCutchan12-Dec-09 6:06

12-Dec-09 6:06

DavidBrother wrote:
Give me a hand please!

Be patient! If anyone has the answer they will post it in their own time.

Richard MacCutchan12-Dec-09 6:11

12-Dec-09 6:11

DavidBrother wrote:
sm.Format(_T("%x"),pAddresses->PhysicalAddress);

PhysicalAddress is an array of bytes; you are converting the first part of its offset value to hex. You need to format each byte of the array in turn.

DavidBrother12-Dec-09 16:34

12-Dec-09 16:34

Thanks!
Richard MacCutchan

Let me try.

I feel this is a little hard function. Smile | :)

DavidBrother12-Dec-09 17:29

12-Dec-09 17:29

Thank you very much!
now it works! Wink | ;)

TAPI send data

cmos12-Dec-09 2:12

12-Dec-09 2:12

Hello,
I need to send data over an active dialup conenction. So I had a look at the TAPI and also
at RasDial. I couldnt find functions like Write(...) to send data with an open tapi line
or rasdial connection.

I want to call a gsm-modem that is connected to a measurement device on the serial port.
Then I want to read and write data with this connection. I had a look at the samples about
tapi, but they are often about opening lines and making calls. I havnt found information
about sending and reading just data with a dialup connection.

Can anyone help me please ?

best regards,
cmos

Richard MacCutchan12-Dec-09 2:51

12-Dec-09 2:51

I suspect you would need to use the Serial Communications[^] methods to resolve this problem.

cmos12-Dec-09 4:11

12-Dec-09 4:11

Thanks for the answer, but I dont need serial communication.
The measurement device is not directly conencted to the computer.
It's about some miles aways. So I need to do it with a dialup
connection and send the commands, that i usually send with
serial connection, to the device.

regards,
cmos

Richard MacCutchan12-Dec-09 4:25

12-Dec-09 4:25

cmos wrote:
I dont need serial communication.

So how else do you think you can communicate with devices connected to a serial port? The fact that your data will go through a modem should not make any difference, you just have to put the dialling sequences at the begnning to establish connection with your remote device. This is simlar to an old fashioned TTY terminal setup. If you Google this you can probably find a ready made program to help you.

cmos12-Dec-09 4:36

12-Dec-09 4:36

<blockquote class="FQ"><div class="FQA">Richard MacCutchan wrote:</div>So how else do you think you can communicate with devices connected to a serial port?</blockquote>
Actually I thought for this reason there is the TAPI.

But I considered about your statement. I guess you mean that I open the modem com-port and then send the AT commands
establishing the modem connection ? Then I can send data with
the Write command and receive with the Read command. Hope this is the right idea (?).

regards,
cmos

Richard MacCutchan12-Dec-09 4:53

12-Dec-09 4:53

That's correct; the modem part is required to establish the end to end connection, and after that you talk to the device directly as if the modem is not present. A bit like making a telephone call.

cmos12-Dec-09 5:07

12-Dec-09 5:07

Ok, thanks a lot.
A last question anyway. Is that possible with TAPI as well ? Making a call and sending data ?

regards,
cmos

Richard MacCutchan12-Dec-09 6:04

12-Dec-09 6:04

cmos wrote:
Is that possible with TAPI as well ? Making a call and sending data ?

Sorry but I don't know, I've never used TAPI, I can only suggest you look at the information on MSDN, or Google it.

cmos12-Dec-09 14:19

12-Dec-09 14:19

Hello,
I downloaded a terminal program and tried out some AT commands.
There it works. For example when I send ATZ i get the modems
baudrate. Or when I send AT&F i get an OK as reply.

But when I start my program, open the com port and send
AT&F I get as reply AT&F. When I send ATZ I get as reply
ATZ. So, then I tried another tool from the internet
and opened the comport with it. There's the same problem.
When I send an AT command I get no answer but I get back the
AT command that i've send just one second ago.

Did I miss some import part ?

I just call Serial.Write(_T("ATZ"), sizeof(_T("ATZ")));

Any ideas ?

regards,
cmos

Richard MacCutchan12-Dec-09 22:52

12-Dec-09 22:52

cmos wrote:
I just call Serial.Write(_T("ATZ"), sizeof(_T("ATZ")));

I think these characters need to be in ASCII. Serial lines do not handle Unicode.

cmos13-Dec-09 1:18

13-Dec-09 1:18

Hello,

now everything works. The reason for not seeing the rest of the response was that there
is a 0 (zero) in the answer string from the modem. So the string "ends" at this position.

thanks,
cmos

Richard MacCutchan13-Dec-09 1:33

13-Dec-09 1:33

cmos wrote:
thanks

Happy to help; good luck with your project.