Re: How to assign a static IP address to the network adapter at runtime

From: Selin Metin (nospam_at_nospam.com.tr)
Date: 07/30/04 

Date: Fri, 30 Jul 2004 17:32:54 +0300

When I directly assign the name VMINI1 to DeviceIoControl parameter, binding
happens. But the changes I made don't take effect. Without calling the
DeviceIoControl code snippet I can see the new assigned addresses in Network
and Dial-up
Connections/VMINI1 properties. However after DeviceIoControl is called,
everything is the same as before.

What else should I do to assign a static IP address to my platform? Where am
I making a mistake?

"Selin Metin" <nospam@nospam.com.tr> wrote in message
news:#aF3clidEHA.3988@tk2msftngp13.phx.gbl...
> Hi all,
> I'm trying to assign a static IP address to the network adapter of my cepc
> at runtime. The code below runs correctly so far, but when I check the new
> assigned IP address with ipconfig /all from command prompt, I see that the
> changes didn't take effect. However when I open the Control Panel/Network
> and Dial-up Connections/VMINI1, I see the address I assigned to the cepc.
>
> //////////////////////////////////////////////////////////////
> CString str;
> DWORD Addr;
> TCHAR szTemp[256];
> HKEY hKey;
> LONG hRes;
> DWORD Len;
> BYTE lpBuffer;
>
> _tcscpy (szTemp, TEXT("Comm\\"));
> _tcscat (szTemp, (LPWSTR)(LPCTSTR)m_szAdapterName);
> _tcscat (szTemp, TEXT("\\Parms\\TcpIp"));
> hKey = NULL;
> hRes = RegOpenKeyEx (HKEY_LOCAL_MACHINE, szTemp, 0, 0, &hKey);
> if (ERROR_SUCCESS == hRes && hKey != NULL)
> {
> lpBuffer = 0;
> RegSetValueEx (hKey, TEXT("EnableDHCP"), 0, REG_DWORD,
> &lpBuffer, sizeof(DWORD));
>
> GetDlgItem(IDC_IPADDRESS)->GetWindowText(str);
> Addr = StringToAddr((LPWSTR)(LPCTSTR)str);
> if (!IsValidIPAddress(Addr))
> return;
> IPAddrToStr (szTemp, Addr);
> Len = _tcslen(szTemp)+1;
> szTemp[Len++] = TEXT('\0');
> RegSetValueEx (hKey, TEXT("IpAddress"), 0, REG_MULTI_SZ,
> (BYTE *)szTemp, sizeof(TCHAR)*Len);
>
> GetDlgItem(IDC_SUBNETMASK)->GetWindowText(str);
> Addr = StringToAddr((LPWSTR)(LPCTSTR)str);
> if (!IsValidIPAddress(Addr))
> return;
> IPAddrToStr (szTemp, Addr);
> Len = _tcslen(szTemp)+1;
> szTemp[Len++] = TEXT('\0');
> RegSetValueEx (hKey, TEXT("Subnetmask"), 0, REG_MULTI_SZ,
> (BYTE *)szTemp, sizeof(TCHAR)*Len);
>
> GetDlgItem(IDC_DEFGATEWAY)->GetWindowText(str);
> if (!str.IsEmpty()) {
> Addr = StringToAddr((LPWSTR)(LPCTSTR)str);
> if (!IsValidIPAddress(Addr))
> return;
> }
> else
> Addr = 0;
> IPAddrToStr (szTemp, Addr);
> Len = _tcslen(szTemp)+1;
> szTemp[Len++] = TEXT('\0');
> RegSetValueEx (hKey, TEXT("DefaultGateway"), 0, REG_MULTI_SZ,
> (BYTE *)szTemp, sizeof(TCHAR)*Len);
>
> GetDlgItem(IDC_PRIMARYDNS)->GetWindowText(str);
> if (!str.IsEmpty()) {
> Addr = StringToAddr((LPWSTR)(LPCTSTR)str);
> if (!IsValidIPAddress(Addr))
> return;
> }
> else
> Addr = 0;
> IPAddrToStr (szTemp, Addr);
> Len = _tcslen(szTemp)+1;
> szTemp[Len++] = TEXT('\0');
> RegSetValueEx (hKey, TEXT("DNS"), 0, REG_MULTI_SZ,
> (BYTE *)szTemp, sizeof(TCHAR)*Len);
>
> GetDlgItem(IDC_PRIMARYWINS)->GetWindowText(str);
> if (!str.IsEmpty()) {
> Addr = StringToAddr((LPWSTR)(LPCTSTR)str);
> if (!IsValidIPAddress(Addr))
> return;
> }
> else
> Addr = 0;
> IPAddrToStr (szTemp, Addr);
> Len = _tcslen(szTemp)+1;
> szTemp[Len++] = TEXT('\0');
> RegSetValueEx (hKey, TEXT("WINS"), 0, REG_MULTI_SZ,
> (BYTE *)szTemp, sizeof(TCHAR)*Len);
>
> RegCloseKey (hKey);
> }
> //////////////////////////////////////////////////////////////
>
> I assume I have to rebind these new parameters to the network adapter, so
I
> call IOCTL_NDIS_REBIND_ADAPTER with the following code:
>
> //////////////////////////////////////////////////////////////
> // Open the NDIS driver.
> HANDLE hNdis;
> if (INVALID_HANDLE_VALUE == (hNdis = CreateFile(_T("NDS0:"), GENERIC_READ
|
> GENERIC_WRITE,
> 0, NULL, OPEN_EXISTING, 0, NULL))) {
> DWORD dwerr = GetLastError();
> return;
> }
>
> // Send the device command.
> TCHAR errs[ 512 ];
> DWORD xcount;
> TCHAR szDevName[256];
> LPCTSTR szAdaptName = (LPWSTR)(LPCTSTR)m_szAdapterName;
> _tcsncpy(szDevName, szAdaptName, m_szAdapterName.GetLength() + 1);
> LPVOID lpInBuffer = szDevName;
> int klk = 0;
> if (DeviceIoControl(hNdis, IOCTL_NDIS_REBIND_ADAPTER, lpInBuffer,
> _tcslen(m_szAdapterName) + sizeof(TCHAR), // buf contains the name of
the
> adapter
> NULL, 0, &xcount, NULL ) )
> {
> OutputDebugString( _T( "Adapter rebound\r\n" ) );
> }
> else
> {
> _stprintf( errs, _T("DeviceIoControl failed. error = %d\r\n"),
> GetLastError());
> OutputDebugString(errs);
> }
>
> CloseHandle(hNdis);
> //////////////////////////////////////////////////////////////
>
> I always receive error when I call DeviceIoControl with these parameters.
I
> suspect that the adapter name I pass in parameter 3 causes a problem, but
> I'm not sure. Can someone give me a hint on this please?
>
> TIA,
>
> --
> Selin Metin
> selinm_at_esit_dot_com_dot_tr
>
>

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