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From: Paul on 8 May 2008 10:51
I have encountered this issue:
http://support.microsoft.com/kb/154608

(In my case, reverse DNS is not configured, so getnameinfo returns an IP
address and gethostbyaddr, a NetBIOS name prefixed with IS~.)

Obviously I could remove IS~ and perhaps that would be it, for I am aware of
this table:
http://support.microsoft.com/kb/q163409/

but I thought I could give it a try and take it a little further than
gethostbyaddr does: obtain a name table for the required host and find not
just the first unique name but a proper machine one.

Using NetBIOS API, I got as far as displaying name tables for hosts and MAC
addresses of adapters whose NetBIOS name I know but I cannot think of a way
of getting a NetBIOS name from an IP address. Could you put me in the right
direction?

Thank you.

Paul
From: "Charles Wang [MSFT]" on 9 May 2008 01:20
Hi Paul,
I understand that you would like to know how to get a NetBIOS name from an
IP address by using NetBIOS API.
If I have misunderstood, please let me know.

From my research, you can use NetBIOS API to retrieve host names and MAC
addresses of the network adapters, however to retrieve NetBIOS name from an
IP address, you need to use the WinSock API gethostbyaddr instead of
NetBIOS API. From this article,
http://msdn.microsoft.com/en-us/library/ms738521(VS.85).aspx, we can also
find the following descriptions:
"Developers requiring NetBIOS name resolution may need to use gethostbyaddr
until their applications are completely independent of NetBIOS names."

You can retrieve the Netbios name from an IP address with the following
code:
==============================
unsigned long res;
WSADATA wsaData;
HOSTENT* pHost;

res = inet_addr(ip);
if ((res == INADDR_NONE) || (res == 0)) {
strcpy(host, "unable to resolve");
return false;
}

if (WSAStartup(MAKEWORD(1, 1), &wsaData)) {
strcpy(host, "unable to resolve");
return false;
}

pHost = gethostbyaddr((char*)&res, sizeof(res), AF_NETBIOS);
if (pHost == NULL) {
MessageBox("unable to resolve");
return false;
}
MessageBox(pHost->h_name);
WSACleanup();
=================================

Also I do not recommend that you use NetBios API since Netbios is not
available for use on Windows Vista, Windows Server 2008, and subsequent
versions of the operating system. You can find the clarification in this
article:
Netbios Function
http://msdn.microsoft.com/en-us/library/bb870903(VS.85).aspx

If you want to get Network parameters information, I would recommend that
you use IP Helper functions and Winsock functions such as GetAdaptersInfo
and gethostbyaddr. You may also refer to this article for more information:
Review of the network adapter parameters
http://www.codeproject.com/KB/IP/bsipconfig.aspx

Hope this helps. If you have any other questions or concerns, please feel
free to let me know.

Have a nice day!

Best regards,
Charles Wang
Microsoft Online Community Support
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From: "Charles Wang [MSFT]" on 9 May 2008 01:30
Hi Paul,

I notice that you have posted the same question in our
microsoft.public.win32.programmer.networksnewsgroup, which I have also
already responded. So please check my answer there and if you need any
further assistance on this particular issue, please reply to me in that
thread so I can follow up with you in time.


Best regards,
Charles Wang
Microsoft Online Community Support
=========================================================
Delighting our customers is our #1 priority. We welcome your
comments and suggestions about how we can improve the
support we provide to you. Please feel free to let my manager
know what you think of the level of service provided. You can
send feedback directly to my manager at: msdnmg(a)microsoft.com.
=========================================================
This posting is provided "AS IS" with no warranties, and confers no rights.
=========================================================

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