DhcpGetClientInfo and Error 1783 in Vista

Hello,

Sample Code below always returns error code 1783 in Vista (SP1) but works
fine in Windows XP (SP3). Is it bug or my mistake?

I'm use:

1) Windows Software Development Kit (SDK) for Windows Server 2008 and .NET
Framework 3.5
2) VS2005 (SP1)

-------------------------------------

Code Snippet....
#include <windows.h>
#include <dhcpsapi.h>

#pragma comment(lib, "Dhcpsapi.lib")

....

DWORD GetClientInfoByMAC(LPCTSTR pszDhcpServerIP, BYTE* pMac, DWORD
nMacLength, DHCP_CLIENT_INFO** ppInfo)
{
DHCP_SEARCH_INFO query;
query.SearchType = DhcpClientHardwareAddress;
query.SearchInfo.ClientHardwareAddress.DataLength = nMacLength;
query.SearchInfo.ClientHardwareAddress.Data = pMac;
return DhcpGetClientInfo(pszDhcpServerIP, &query, ppInfo);
}

....

BYTE Mac[11] = {0};
//Subnet address in host order. (192.168.1.0)
Mac[0] = 0;
Mac[1] = 1;
Mac[2] = 168;
Mac[3] = 192;
//Hardware address type, this is the default value.
Mac[4] = 0x01;
//My MAC bytes start from here (00:15:60:b0:2d:da)
Mac[5] = 0x00;
Mac[6] = 0x15;
Mac[7] = 0x60;
Mac[8] = 0xb0;
Mac[9] = 0x2d;
Mac[10] =0xda;

DHCP_CLIENT_INFO* pCI_MAC = {0};
DWORD nError = GetClientInfoByMAC(_T("192.168.1.10"), Mac, sizeof(Mac),
&pCI_MAC);
if(nError == ERROR_SUCCESS)
{
//IT WORKS!!!
...
}
else
{
//ERROR!!!
...
}

----------------------
Thanks,
Vlad

Hi
Maybe this can Help, http://support.microsoft.com/kb/928233
Jack (MS, MVP-Networking)

"VladZ" <VladZ@discussions.microsoft.com> wrote in message
news:B8CE3DB3-254D-4532-B3AE-B3ACA2D24E96@microsoft.com...
> Hello,
>
> Sample Code below always returns error code 1783 in Vista (SP1) but works
> fine in Windows XP (SP3). Is it bug or my mistake?
>
> I'm use:
>
> 1) Windows Software Development Kit (SDK) for Windows Server 2008 and .NET
> Framework 3.5
> 2) VS2005 (SP1)
>
> -------------------------------------
>
> Code Snippet....
> #include <windows.h>
> #include <dhcpsapi.h>
>
> #pragma comment(lib, "Dhcpsapi.lib")
>
> ...
>
> DWORD GetClientInfoByMAC(LPCTSTR pszDhcpServerIP, BYTE* pMac, DWORD
> nMacLength, DHCP_CLIENT_INFO** ppInfo)
> {
> DHCP_SEARCH_INFO query;
> query.SearchType = DhcpClientHardwareAddress;
> query.SearchInfo.ClientHardwareAddress.DataLength = nMacLength;
> query.SearchInfo.ClientHardwareAddress.Data = pMac;
> return DhcpGetClientInfo(pszDhcpServerIP, &query, ppInfo);
> }
>
> ...
>
> BYTE Mac[11] = {0};
> //Subnet address in host order. (192.168.1.0)
> Mac[0] = 0;
> Mac[1] = 1;
> Mac[2] = 168;
> Mac[3] = 192;
> //Hardware address type, this is the default value.
> Mac[4] = 0x01;
> //My MAC bytes start from here (00:15:60:b0:2d:da)
> Mac[5] = 0x00;
> Mac[6] = 0x15;
> Mac[7] = 0x60;
> Mac[8] = 0xb0;
> Mac[9] = 0x2d;
> Mac[10] =0xda;
>
> DHCP_CLIENT_INFO* pCI_MAC = {0};
> DWORD nError = GetClientInfoByMAC(_T("192.168.1.10"), Mac, sizeof(Mac),
> &pCI_MAC);
> if(nError == ERROR_SUCCESS)
> {
> //IT WORKS!!!
> ...
> }
> else
> {
> //ERROR!!!
> ...
> }
>
> ----------------------
> Thanks,
> Vlad
>

My Vista gets IP from DHCP very well. And "The DhcpGetClientInfo function
returns information about a specific DHCP client..." (see DHCP API).
Code sample from my first post for search information about client (not
about my computer!) using its MAC address.

--
Vlad


"Jack (MVP-Networking)." wrote:

> Hi
> Maybe this can Help, http://support.microsoft.com/kb/928233
> Jack (MS, MVP-Networking)
>
> "VladZ" <VladZ@discussions.microsoft.com> wrote in message
> news:B8CE3DB3-254D-4532-B3AE-B3ACA2D24E96@microsoft.com...
> > Hello,
> >
> > Sample Code below always returns error code 1783 in Vista (SP1) but works
> > fine in Windows XP (SP3). Is it bug or my mistake?
> >