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first of all thanks for the fast respond
and i checked that site too .. seems that there are
3 solutions available:
1) NetBIOS API -> machine need to have NETBIOS installed .. not good solution
2) RPC/OLE API -> fails in alot of situations (not good neither)
3) SNMP API -> veryy complex
Isn't there just a simple SDK function available to solve this little problem?
Modified:
I tried to work with the SDK 'GetAdaptersInfo'.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/iphlp/iphlp/ip_interface_info.asp
But the header needed 'Ipexport.h' don't find it on my system.
Is this SDK function the one i need?
Best regards
Jens
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  But anyway I can try it:
first usage and then the whole code
<br />
char adapterNames[4096];<br />
LPSTR buffer = adapterNames;<br />
<br />
if( GetAdapterNames(buffer) )<br />
{<br />
while(*buffer)<br />
{<br />
BYTE a[6];<br />
if(GetMacAddr(a, buffer))<br />
{<br />
printf(" %02.2X-%02.2X-%02.2X-%02.2X-%02.2X-%02.2X\n", a[0], a[1], a[2], a[3], a[4], a[5]);<br />
}<br />
buffer = strchr(buffer, 0) + 1;<br />
}<br />
}<br />
<br />
<br />
<br />
<br />
BOOL GetAdapterNames( LPSTR buffer )<br />
{<br />
HKEY hRoot = NULL;<br />
LPCSTR rootName = "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards";<br />
<br />
DWORD ret = RegOpenKeyEx( HKEY_LOCAL_MACHINE, rootName, 0, KEY_READ, &hRoot );<br />
if( ret )<br />
return FALSE;
<br />
char keyName[50];<br />
DWORD keyNum = 0;<br />
LPCSTR valName = "ServiceName";<br />
__try<br />
{<br />
for( ; ; )<br />
{<br />
ret = RegEnumKey( hRoot, keyNum, keyName, 19 );<br />
if(ret)<br />
{<br />
if( ret == ERROR_NO_MORE_ITEMS )<br />
{<br />
*buffer = 0;<br />
return TRUE;<br />
}<br />
else<br />
{<br />
return FALSE;<br />
}<br />
}<br />
<br />
HKEY hKey = NULL;<br />
ret = RegOpenKey( hRoot, keyName, &hKey );<br />
if(ret)<br />
return FALSE;<br />
<br />
DWORD buflen = 50;<br />
ret = RegQueryValueEx( hKey, valName, NULL, NULL, (LPBYTE)buffer, &buflen );<br />
RegCloseKey( hKey );<br />
if( ret )<br />
return FALSE;<br />
<br />
buffer += buflen;<br />
keyNum++;<br />
}<br />
}<br />
__finally<br />
{<br />
RegCloseKey( hRoot );<br />
}<br />
<br />
return FALSE;<br />
};<br />
<br />
<br />
<br />
BOOL GetMacAddr(LPBYTE buffer, LPCSTR devName)<br />
{<br />
BOOL bSuccess = FALSE;<br />
char linkName[512];<br />
char deviceName[64];<br />
BOOL bCreatedDevice = FALSE;<br />
<br />
if( QueryDosDevice(devName, linkName, sizeof(linkName)) == 0 )<br />
{<br />
if( GetLastError() == ERROR_FILE_NOT_FOUND )<br />
{<br />
strcat( strcpy(deviceName, "\\Device\\"), devName );<br />
<br />
if( !DefineDosDevice(DDD_RAW_TARGET_PATH, devName, deviceName) )<br />
return FALSE;<br />
<br />
bCreatedDevice = TRUE;<br />
}<br />
else<br />
return FALSE;<br />
}<br />
<br />
char macFileName[64];<br />
strcat( strcpy(macFileName, "\\\\.\\"), devName );<br />
<br />
HANDLE hMAC = CreateFile( macFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL );<br />
if( hMAC != INVALID_HANDLE_VALUE )<br />
{<br />
BYTE oidData[256];<br />
NDIS_OID oidCode = OID_802_3_CURRENT_ADDRESS;<br />
DWORD retCount;<br />
if( DeviceIoControl(hMAC, IOCTL_NDIS_QUERY_GLOBAL_STATS, &oidCode, sizeof(oidCode), oidData, sizeof(oidData), &retCount, NULL) )<br />
{<br />
bSuccess = (retCount == 6);<br />
if( bSuccess )<br />
memcpy(buffer, oidData, 6);<br />
}<br />
}<br />
<br />
if(bCreatedDevice)<br />
{<br />
if( !DefineDosDevice(DDD_RAW_TARGET_PATH | DDD_REMOVE_DEFINITION | DDD_EXACT_MATCH_ON_REMOVE, devName, deviceName) )<br />
{<br />
if( hMAC != INVALID_HANDLE_VALUE )<br />
CloseHandle( hMAC );<br />
<br />
return FALSE;<br />
}<br />
}<br />
<br />
if( hMAC != INVALID_HANDLE_VALUE )<br />
CloseHandle( hMAC );<br />
<br />
return bSuccess;<br />
}<br />
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Thank you geo_m but i'm running win2k here. So this isn't the correct solution neither :S
But thanks for the response.
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Eh, I allways thought that the w2k is NT based - what works for NT, works usually for w2k  . Anyway this code snippet is tested on w2k extensively by our clients
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JensB wrote:
Isn't there just a simple SDK function available to solve this little problem?
Two my knowledge there is no SDK function that can do what you want. Besides that, if there was one then why would people go through so much trouble and implement those 3 methods that you saw in the website?
JensB wrote:
But the header needed 'Ipexport.h' don't find it on my system.
I really don't know the answer to this question. Sorry.
// Afterall I realized that even my comment lines have bugs
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Two my knowledge there is no SDK function that can do what you want. Besides that, if there was one then why would people go through so much trouble and implement those 3 methods that you saw in the website?
Maybe they are freakie héhé
I think they want to have a solution that runs on all OS'es.
I just found this following url:
http://www.ndis.com/faq/QA01030302.htm
There is only 1 solution that works on all os'es and that is the very complex SNMP one.
I think i'll go for the SDK function "GetAdaptersInfo". But i think i'll need to install SDK too. That i maybe will get that 'Ipexport.h' header file.
Anyway, never thought it would be that hard to do such easy retrieval.
Greetings
Jens
P.S. Debug your comment lines 
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Hi..
I've used CreateProcess with SW_HIDE to launch a 3rd party middleware program hidden, but now the 3rd party program has been updated and suddenly my code don't work anymore (the launched window does not hide) ?
What could be the reason for that ? I'm totally blank 
My code below... (still works wih the old version & other programs)
memset(&starttype, 0, sizeof(starttype));
starttype.dwFlags = STARTF_USESHOWWINDOW;
starttype.wShowWindow = SW_HIDE;
CString appParam = m_cmp + "\\iefcm65n.exe iefcm65n startup /initfile=iefcmn.ini";
CString workdir = m_cmp;
if (CreateProcess(NULL,(LPTSTR) (LPCTSTR) appParam,NULL,NULL,FALSE,0,NULL, (LPTSTR) (LPCTSTR) workdir, &starttype, &pinfo))
{
prochandle = (long) pinfo.hProcess;
threadid = pinfo.dwThreadId;
....
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Thomas Andersen wrote:
but now the 3rd party program has been updated and suddenly my code don't work anymore
You just answered your question - the new program is doing something to override your SW_HIDE request. This might be as simple as them calling ShowWindow() twice, where before they were calling it once. The first ShowWindow() ignores its parameter and uses the SW_HIDE value that you specify, but subsequent calls use the parameter the caller passes.
--Mike--
Mister Sparkle is disrespectful to dirt.
Homepage | RightClick-Encrypt | 1ClickPicGrabber
"You have Erica on the brain" - Jon Sagara to me
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Thanks...
I take it that there's no way to get past it then ?
I can't think of any, but then again I'm not that good at programming 
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try Finding the window with FindWindow and send it urself a ShowWindow ( SW_HIDE )
u can use the spy++ to get the class name if u need so
Papa
while (TRUE)
Papa.WillLove ( Bebe ) ;
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Thanks
I just tried this right after CreateProcess
char wintxt_memory[] = "Client Manager";
char winclass_memory[] = "IEFWINDOW";
LPTSTR wintxt = wintxt_memory;
LPTSTR winclass = winclass_memory;
HWND h = NULL;
h = ::FindWindow(winclass,wintxt);
if (h != NULL)
::SetWindowPos(h, HWND_BOTTOM, 0, 0, 0, 0, SWP_HIDEWINDOW);
However the window is visible for a brief,flickering and noticable moment and if at all possible I would like to avoid that
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Thanks, I'll give it a try.
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You may also want to try not setting the STARTF_USESHOWWINDOW flag in STARTUPINFO structure.
Chen Venkataraman
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Thanks, but I've used the STARTF_USESHOWWINDOW all the time.
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be warned when working with third party apps ( mainly if you don't know what library ( and language ) created it. We had a major issue awhile back working with apps created in delphi because it turns out the "main" window is handled by a global application object and not allowed available for use by outside apps.
Never did get that fixed.... 
Joseph Dempsey
joseph_r_dempsey@yahoo.com
"Software Engineering is a race between the programmers, trying to make bigger and better fool-proof software, and the universe trying to make bigger fools. So far the Universe in winning."
--anonymous
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Thanks, for the warning, I really hope that this won't be one of those that can't be fixed.
I'm almost 100% positive that Visual C++ 6.0 was used for this particular app.
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Hi There,
Could anyone help me with the code to Auto-Lock a NT4.0 Workstation after a certain period. The program should run as a service under a Local Admin account because on NT the user policies is going to prevent other users from
changing the delay as with a screensaver. Any help would be much appreciated.
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You mean something like described in Q262646 in MS KB?
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What exactly does Q262646 say?? I've found a few Q's on Microsoft's Knowledge Base but I can't find 262646.
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The full name is
"How to Lock a Workstation from the Command Line"
and I really cannot found it on the microsoft's website in any way... But it can be found in the msdn library I have installed on my computer. If you haven't I can rephrase the article for you.
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an official solution from MS how to lock a NT4 workstation - part of Q262646
....
There is no solution to lock a Windows NT 4.0-based workstation from the command line. You can, however, achieve a similar effect with some additional configuration.
In Windows NT 4.0, you can use the SendMessage call to send a SC_SCREENSAVE message to the topmost window, which locks the workstation if the current user has a screen saver configured and the screen saver is configured to require a password.
To ensure that a screen saver is configured, you can create registry entries. Run a registry (.reg) file that adds the following entries from the command line:
HKCU\Control Panel\Desktop\ScreenSaveActive = 1<br />
HKCU\Control Panel\Desktop\ScreenSaverIsSecure = 1<br />
HKCU\Control Panel\Desktop\ScreenSaveTimeout = timeout in seconds<br />
HKCU\Control Panel\Desktop\SCRNSAVE.EXE = %SystemRoot%\System32\Appropriate screen saver.scr
Some screen savers require additional parameters in HKCU\Control Panel\Screen Saver.screen saver name as well.
After you create these registry entries, the following call invokes the screen saver:
SendMessage(HWND_TOPMOST, WM_SYSCOMMAND, SC_SCREENSAVE, 0)
You must write and compile a short program (.exe file) that contains this call. You can then call your program from the command line to activate the screen saver. Because the ScreenSaverIsSecure value in the registry has been set to 1, this has the effect of locking the workstation.
....
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Hi, everyone!
I have written a small program which can send SYN TCP package.
The trouble I met with is when using 1.2.3.4 as source address
and using 2.3.4.5 as desrination address, all procudure works
OK. I have used Ethereal to sniffer the sending out packages.
But when I change the address to the real address of the LAN of
our lab. Strange packages are sent. They are ARP packages.
For example, when I change source address to 210.73.46.75 and
destination address to 210.73.46.82. Ethereal reports to me
a ARP package is sent, which means "who has 210.73.46.82? Tell
210.73.46.75".
How to use real network address to send a SYN TCP package?
Here is all of my source codes.
Source codes:
--------
/********************** main.c source file ************************/
#include <winsock2.h>
#include <windows.h>
#include <ws2tcpip.h>
#include <stdio.h>
#pragma comment(lib, "ws2_32.lib")
struct tcpheader {
unsigned short int th_sport;
unsigned short int th_dport;
unsigned int th_seq;
unsigned int th_ack;
unsigned char th_x2:4, th_off:4;
unsigned char th_flags;
unsigned short int th_win;
unsigned short int th_sum;
unsigned short int th_urp;
}; /* total tcp header length: 20 bytes (=160 bits) */
struct ipheader {
unsigned char ip_hl:4, ip_v:4; /* this means that each member is 4 bits */
unsigned char ip_tos;
unsigned short int ip_len;
unsigned short int ip_id;
unsigned short int ip_off;
unsigned char ip_ttl;
unsigned char ip_p;
unsigned short int ip_sum;
unsigned int ip_src;
unsigned int ip_dst;
}; /* total ip header length: 20 bytes (=160 bits) */
typedef struct ps_hdr
{
unsigned int source_address; // Source Address => 4 Bytes
unsigned int dest_address; // Destination Address => 4 Bytes
unsigned char placeholder; // Place Holder => 1 Bytes
unsigned char protocol; // Protocol => 1 Bytes
unsigned short tcp_length; // TCP Length => + 2 Bytes
// = 12 Bytes
struct tcpheader tcp;
}PS_HDR;
// IP/TCP/UDP Checksum Function
USHORT checksum(USHORT *buffer, int size)
{
unsigned long cksum=0;
while (size > 1)
{
cksum += *buffer++;
size -= sizeof(USHORT);
}
if (size)
{
cksum += *(UCHAR*)buffer;
}
cksum = (cksum >> 16) + (cksum & 0xffff);
cksum += (cksum >>16);
return (USHORT)(~cksum);
}
#define PORT 25
int main (void)
{
WSADATA wsd;
char datagram[4096];
int bOpt = 1;
if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
{
printf("WSAStartup() failed: %d\n", GetLastError());
return -1;
}
// Create a raw socket
SOCKET s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
if (s == INVALID_SOCKET)
{
printf("WSASocket() failed: %d\n", WSAGetLastError());
return -1;
}
struct ipheader *iph = (struct ipheader *) datagram;
//struct tcpheader *tcph = (struct tcpheader *) datagram + sizeof (struct ipheader);
struct tcpheader *tcph = (struct tcpheader *) (datagram + sizeof (struct ipheader));
struct sockaddr_in sin;
sin.sin_family = AF_INET;
sin.sin_port = htons (PORT);
sin.sin_addr.s_addr = inet_addr ("210.73.46.82");
memset (datagram, 0, 4096); /* zero out the buffer */
iph->ip_hl = 5;
iph->ip_v = 4;
iph->ip_tos = 0;
iph->ip_len = sizeof (struct ipheader) + sizeof (struct tcpheader);
iph->ip_id = 1;
iph->ip_off = 0;
iph->ip_ttl = 255;
iph->ip_p = 6;
iph->ip_sum = 0;
iph->ip_src = inet_addr ("210.73.46.75");
iph->ip_dst = sin.sin_addr.s_addr;
tcph->th_sport = htons (1234);
tcph->th_dport = htons (PORT);
tcph->th_seq = rand();
tcph->th_ack = 0;
tcph->th_x2 = 0;
tcph->th_off = 5;
tcph->th_flags = 2; // SYN
tcph->th_win = htons(65535);
tcph->th_sum = 0;
tcph->th_urp = 0;
iph->ip_sum = checksum((unsigned short *)&iph, sizeof(ipheader));
struct ps_hdr pseudo_header;
pseudo_header.source_address = inet_addr ("210.73.46.75");
pseudo_header.dest_address = sin.sin_addr.s_addr;
pseudo_header.placeholder = 0;
pseudo_header.protocol = 6;
pseudo_header.tcp_length = htons(20);
pseudo_header.tcp = *tcph;
tcph->th_sum = checksum ((unsigned short *)(&pseudo_header), 32);
if (setsockopt(s, IPPROTO_IP, IP_HDRINCL, (char *)&bOpt, sizeof(bOpt)) == SOCKET_ERROR)
{
printf("setsockopt(IP_HDRINCL) failed: %d\n", WSAGetLastError());
return -1;
}
while (1)
{
// Send The Packet
if (sendto(s, datagram, 40, 0, (SOCKADDR *)&sin, sizeof(sin)) == SOCKET_ERROR)
{
printf("sendto() failed: %d\n", WSAGetLastError());
return -1;
}
}
return 0;
}
/********************** main.c source file ************************/
--------
Thanks in advance,
George
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Hi,
maybe I didn't get it correctly from your description and having no time to test your code, so I hope that I am answering your question .
It goes that way, than when you want to sent some packets from src: 210.73.46.75 to dst: 210.73.46.82, the IP stack needs to know the Ethernet address of the destination card, because it must be filled to the ethernet frame, which will be send.
Therefore the 210.73.46.75 sends ARP packet with a query:
"who has 210.73.46.82? Tell
210.73.46.75".
Then the computer, which have IP 210.73.46.82 will send back his ethernet address, using ARP reply. And then the 210.73.46.75 can finally send the ethernet frame containing your IP packet.
I hope, that this is what you asked and that it cleared the sense of ARP packets as well. If you have some another/additional questions, just ask.
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