Identify a PC 3

[pererm]

How can an aplication get a code or a number that says me which PC is using it? I try with GetCurrentHwProfile(), but the profile, i think, is not exactly "one for each PC"? Ineed help, thanks

 

[Salem]

It's IP address is always unique in any given network.

$ ipconfig

Windows IP Configuration


Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        IP Address. . . . . . . . . . . . : 192.168.0.2
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.0.1

There will be an API to get this somewhere, but that would need a bit of digging in the socket API.


--
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.

 

[ArkM]

Unfortunately, IP address is not permanent PC attribute in any given network (remember DHCP).
Get computer name or network card MAC address (it's unique for every card in the Universe.

Alas, I don't know (don't remeber the simple method(s) to obtain these attributes. May be you try to adopt these two extractions from my old application:

To obtain computer name (change Info::xxx calls to save obtained computer name):

namespace {
const char compname[] = "System\\CurrentControlSet\\Control\\ComputerName\\ComputerName";
}

bool GetCompName()
{
	HKEY	hk = 0;
	char name[MAX_COMPUTERNAME_LENGTH + 1];
	DWORD	psz = sizeof name;

	if (RegOpenKeyEx(
		HKEY_LOCAL_MACHINE,
		compname,
		0,
		KEY_READ,
		&hk) == ERROR_SUCCESS)
	{
		if (RegQueryValueEx(
			hk,
			"ComputerName",
			0, 0,
			(LPBYTE)name,
			&psz
			) == ERROR_SUCCESS)
		{
			Info::printf("Computer Name",name);
		}
		else
		{
			Info::printf(0,"*** Can\'t get %s value.",compname);
			return false;
		}
		
		if (RegCloseKey(hk) != ERROR_SUCCESS)
		{
			Info::printf(0,"*** Can\t close %s Registry key.",compname);
//			Info::print();
//			exit(3);
		}
	}
	else
	{
		Info::printf("Computer Name","");	// Unknown computer name.
	}
/*
	if (GetComputerName(name,&psz))
		printf("=== GetComputername %.40s\n",name);
	else
		printf("*** GetComputerName failed.\n");
*/
return true;
}

Get (the last) network adapter MAC addr:

namespace {	// Locals

typedef struct _ASTAT_
{

  ADAPTER_STATUS adapt;
  NAME_BUFFER    NameBuff [30];

}ASTAT, * PASTAT;

ASTAT Adapter;

char MAC_addr[16];	// static MAC addr string (12 hexas).

int	errCnt = 0;		// call errors count.

}	// End of locals.

int	errMAC()
{
	return errCnt;
}

/**
 *	Using internal static storage area.
 */
const char* GetMAC()
{
	NCB Ncb;
	UCHAR uRetCode;
	unsigned char NetName[50];
	LANA_ENUM	lenum;
	int		i;

	errCnt = 0;
	memset(NetName,0,sizeof NetName);

	memset( &Ncb, 0, sizeof(Ncb) );
	Ncb.ncb_command = NCBENUM;
	Ncb.ncb_buffer = (UCHAR *)&lenum;
	Ncb.ncb_length = sizeof(lenum);
	uRetCode = Netbios( &Ncb );
	if (uRetCode)
	{
		++errCnt;
		return MAC_addr;
		//printf( "The NCBENUM return code is: 0x%x \n", uRetCode );
	}

	for (i = 0; i < lenum.length ;i++)
	{
		memset( &Ncb, 0, sizeof(Ncb) );
		Ncb.ncb_command = NCBRESET;
		Ncb.ncb_lana_num = lenum.lana[i];

		uRetCode = Netbios( &Ncb );
		if (uRetCode)
		{
		//	printf( "The NCBRESET on LANA %d return code is: 0x%x \n",
		//		  lenum.lana[i], uRetCode );
			++errCnt;
			continue;
		}
		memset( &Ncb, 0, sizeof (Ncb) );
		Ncb.ncb_command = NCBASTAT;
		Ncb.ncb_lana_num = lenum.lana[i];

		strcpy( (char*)Ncb.ncb_callname,  "*               " );
		Ncb.ncb_buffer = (BYTE *) &Adapter;
		Ncb.ncb_length = sizeof(Adapter);

		uRetCode = Netbios( &Ncb );
		if (uRetCode)
		{
			++errCnt;
			continue;
		//	printf("The NCBASTAT on LANA %d return code is: 0x%x \n",
		//		  lenum.lana[i], uRetCode );
		}
		else// ( uRetCode == 0 )
		{
			if (i && memcmp(NetName,Adapter.adapt.adapter_address,6) == 0)
				continue;
			else
				memcpy(NetName,Adapter.adapt.adapter_address,6);
		/*
			 printf("The Ethernet Number on LANA %d is:"
					"%02x%02x%02x%02x%02x%02x\n",
					lenum.lana[i],
		*/
		  sprintf(MAC_addr,"%02X%02X%02X%02X%02X%02X",
			  NetName[0],
			  NetName[1],
			  NetName[2],
			  NetName[3],
			  NetName[4],
			  NetName[5]);
		}
	}
	return MAC_addr;
}

Add netapi32.lib to the project.
See MSDN - codes above was written (many years ago with MSDN help...
May be it helps.
Good luck!

 

[mingis]

GetComputerName()

http://msdn2.microsoft.com/en-us/library/ms724295.aspx