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NBTSTAT -a how to program?

Posted on 1998-01-23
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Which network function(s) do I have to use if I what to develop a WIN32 program which has the same functionality as NBTSTAT -a <IP-ADDRESSE>?
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Question by:phj
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Author Comment

by:phj
ID: 1570624
Edited text of question
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by:jhance
ID: 1570625
Check the documentation on the NetWkstaXXX family of functions.  These will get you most of the available network services.
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by:phj
ID: 1570626
I have been checking NetWkstaXXX as jhance suggested, but did't find any clue here. I looked at DEJANEWS, where other people have asked the same question, but I did't find any answer here.

The only thing I found was that you have to use gethostbyaddr. I don't have doc for this Winsock function here, but I belive that it will take a given IP-address and in my case use WINS or broadcast to resolve this a hostname.

Perhaps you can use this function together with some NetBIOS calls (fx NCB.STATUS), but still I am not close to a solution.

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Expert Comment

by:jhance
ID: 1570627
Maybe you could be more specific about what you are looking for.  NBTSTAT give a bunch of stuff about hosts and shares.  Are you looking to resolve IP addresses to host names?
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Author Comment

by:phj
ID: 1570628
Hi,

Thanks jhance for coming back, this is my first question.

I will try to explane this in some more details.

Exactly what I what to do is to write a program which in a loop looks at all my IP-addresses. Fx NBTSTAT -A 156.136.9.51 will if this a WfW og NT give me the Remote Name table of this PC. I use static IP-addressing so i know in which range the pc's are would be. Also the Computer name (NetBios name) of a given pc is also done in a very strict system.

In this example NBTSTAT -A 156.136.9.51 will give my the following information: IP-address of course, Computer name, User name and MAC addresse. When this program has been running for a while I have a file containg, i hope, 95% off all the IP-addresses in use and there corresponding computer name, user name and MAC-addresse. Whith this file I will be able to update our user administration system which so far only has oneway. (It runs a IBM Mainframe).

Back to the software. I have V-COMM sourcer looked at NBTSTAT and to my surprise it uses the following DLL: WOSCK32, NTDLL, MSVCRT, ADVAPI32, USER32.

In WSOCK32.DLL it uses only function 10 (inet_addr),14 (ntohl) and 1108 (s_perror). None off these are very interresting. So NBTSTAT must do something else.

In a book I have about Windows NT Networkprogramming, there is some examples using the NetBIOS() API, fx NCB.ENUM, NCB.ADAPTER.STATUS, NCB.SESSION.STATUS. If you should use NETBIOS API, why don't NBTSTAT?.

I will reale hope that this will help.

Thanks for this very objectiv view on this problem :-)


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jhance earned 100 total points
ID: 1570629
So I think you want to get 3 things from your IP address. Computername, MAC Address, and user name.  These can be had as follows:

Computername: use gethostbyaddr(), assuming you are using DNS or a HOSTS file, this will get you to the TCP/IP hostname.

MAC Address, here is an example:

From the NETBIOS documentation:


#include <windows.h>
#include <wincon.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
typedef struct _ASTAT_{    ADAPTER_STATUS adapt;
    NAME_BUFFER NameBuff [30];
}ASTAT, * PASTAT;
ASTAT Adapter;

void main (void)
{    
 NCB ncb;
    UCHAR uRetCode;
    char NetName[50];
    memset( &ncb, 0, sizeof(ncb) );
    ncb.ncb_command = NCBRESET;
    ncb.ncb_lana_num = 0;
    uRetCode = Netbios( &ncb );
    printf( "The NCBRESET return code is: 0x%x \n", uRetCode );
    memset( &ncb, 0, sizeof(ncb) );
    ncb.ncb_command = NCBASTAT;
    ncb.ncb_lana_num = 0;
    strcpy( ncb.ncb_callname, "* " );
    ncb.ncb_buffer = (char *) &Adapter;
    ncb.ncb_length = sizeof(Adapter);
    uRetCode = Netbios( &ncb );
    printf( "The NCBASTAT return code is: 0x%x \n", uRetCode );
    if ( uRetCode == 0 )    {
        printf( "The Ethernet Number is: %02x%02x%02x%02x%02x%02x\n",
                Adapter.adapt.adapter_address[0],
                Adapter.adapt.adapter_address[1],
                Adapter.adapt.adapter_address[2],
                Adapter.adapt.adapter_address[3],
                Adapter.adapt.adapter_address[4],
                Adapter.adapt.adapter_address[5] );
    }
}  


User name:  Use the NetWkstaUserEnum() API function
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Author Comment

by:phj
ID: 1570630
Hi,

Sorry for the delayed response.

This is much more complex than I thought. So after some thoughts I have concluded that the easyest way is to write a dos program which calls NBTSTAT -A <IP ADDRESS>.

So I rest my case :-)


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