I want to connect to the wireless access point. The problem is WlanConnect returns 87 error code which means the wrong parameter.
Code:
WLAN_REASON_CODE wlanReasonCode;
DWORD dwResult = 0;
DWORD dwPrevNotif = 0;
QString apName = "some SSID";
WLAN_CONNECTION_PARAMETERS connectionParameters;
memset(&connectionParameters, 0, sizeof(WLAN_CONNECTION_PARAMETERS));
connectionParameters.wlanConnectionMode = wlan_connection_mode_profile;
connectionParameters.strProfile = apName.toStdWString().c_str();
connectionParameters.dwFlags = 0;
connectionParameters.pDot11Ssid = NULL;
connectionParameters.pDesiredBssidList = 0;
connectionParameters.dot11BssType = dot11_BSS_type_any;
dwResult = WlanConnect(hClient, &pIfInfo->InterfaceGuid, &connectionParameters, NULL);
if (dwResult == ERROR_SUCCESS) {
qDebug() << "Connected";
} else {
emit apNotConnected(dwResult);
}
I think the problem somewhere in WLAN_CONNECTION_PARAMETERS structure. Any ideas or example with proper wlan connection?
OS: Windows 10
I use Qt 5.9.2 with Microsoft Visual Studio 2017 compiler.
Thanks in advance.
I have fixed the issue. The issue was that Qt does not properly cast data types, so the wlan profile was corrupted. I fixed it by combining Win API with standard C++ data types.
Related
I tried to read network computer names using WNetOpenEnum. I am getting only 'Microsoft Terminal Services', 'Microsoft Windows Network' and 'Web Client Network'. Not getting the other machine connected in network.
Is there any way to read the names/IP of computers connected to network?.
if(NO_ERROR == WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY, 0, pnetrParent, &hEnum))
{
DWORD dwCount = 1;
char szBuffer[512];
char* psz = szBuffer;
DWORD dwBufferSize = sizeof(szBuffer);
while (NO_ERROR == WNetEnumResource(hEnum, &dwCount, &szBuffer, &dwBufferSize))
{
NETRESOURCE* pnetResource = (NETRESOURCE*)psz;
if (NULL != pnetResource->lpRemoteName && *pnetResource->lpRemoteName)
{
m_lstIPAddress.AddString(pnetResource->lpRemoteName);
}
dwBufferSize = sizeof(szBuffer);
}
DWORD retValue = WNetCloseEnum(hEnum);
}
Any help would be appreciated.
You need to call it recursively. Microsoft Windows Network has computers listed. So next call to WNetOpenEnum will have handle to Microsoft Windows Network you received as first parameter and so on.
I believe this would give you answer: https://learn.microsoft.com/en-us/windows/win32/wnet/enumerating-network-resources
I use the following code to verify that a serial port name is valid on the computer:
typedef std::pair<StrAsc const, bool> port_pair_type;
typedef std::list<port_pair_type> port_pairs_type;
port_pairs_type pairs;
StrBin config_buffer;
config_buffer.fill(0,sizeof(COMMCONFIG));
while(!pairs.empty())
{
port_pair_type pair(pairs.front());
pairs.pop_front();
if(!pair.second)
{
// we need to get the default configuration for the port. This may
// require some fudging on the buffer size. That is why two calls
// are being made.
uint4 config_size = config_buffer.length();
StrUni temp(pair.first);
COMMCONFIG *config(reinterpret_cast<COMMCONFIG *>(config_buffer.getContents_writable()));
config->dwSize = sizeof(COMMCONFIG);
rcd = GetDefaultCommConfigW(
temp.c_str(), config, &config_size);
if(!rcd && config_buffer.length() < config_size)
{
config_buffer.fill(0, config_size);
config = reinterpret_cast<COMMCONFIG *>(config_buffer.getContents_writable());
config->dwSize = sizeof(COMMCONFIG);
rcd = GetDefaultCommConfigW(
temp.c_str(),
reinterpret_cast<COMMCONFIG *>(config_buffer.getContents_writable()),
&config_size);
}
// if the call succeeded, we can go ahead and look at the
// configuration structure.
if(rcd)
{
COMMCONFIG const *config = reinterpret_cast<COMMCONFIG const *>(
config_buffer.getContents());
if(config->dwProviderSubType == PST_RS232)
port_names.push_back(pair.first);
}
else
{
OsException error("GetDefaultCommConfig Failed");
trace("\"%s\"", error.what());
}
}
else
port_names.push_back(pair.first);
}
On windows 10, when trying to confirm a serial port that uses usbser.sys, the call to GetDefaultCommConfig() is failing and the error code returned by GetLastError() is 87 (invalid parameter). As I am aware, the usbser.sys driver has been rewritten on windows 10 and I suspect that this is a problem with that driver. Does anyone else have an idea of what might be going wrong?
This had been a bug in usbser.sys and was fixed with the Windows 10 Update KB3124262 from 27.01.2016.
The Microsoft employee explained:
The COM port name in the HKLM\HARDWARE\DEVICEMAP\SERIALCOMM registry is not NULL terminated.
Related discussion on MSDN
Because of Windows 10's update policies this issue should not appear in the future anymore.
When you call GetDefaultCommConfigW the second time you probably need to config->dwSize to the new size the structure. Eg:
config->dwSize = config_size;
I'm trying to add a local user to Windows using the Network Management API. I'm having no problems when running on Windows 7 (either on a domain or workgroup) or windows 2008 R2 server when on a domain. However, if I run this on Windows server 2008 R2 that isn't on a domain I get an error. Problem is the error code returned is -1 rather than one of the given errors in the documentation
bool CLocalUsers::AddUser(LPCTSTR lpszUserName, LPCTSTR lpszPassword)
{
// Clear error code
m_dwLastError = 0;
USER_INFO_1 ui;
ui.usri1_name = (LPTSTR)(LPCTSTR)lpszUserName;
ui.usri1_priv = USER_PRIV_USER;
ui.usri1_home_dir = NULL;
ui.usri1_comment = NULL;
ui.usri1_flags = UF_SCRIPT | UF_DONT_EXPIRE_PASSWD;
ui.usri1_script_path = NULL;
// Point to a zero character password if null
if(lpszPassword == NULL)
{
lpszPassword = _T("");
ui.usri1_flags |= UF_PASSWD_NOTREQD;
}
ui.usri1_password = (LPTSTR)(LPCTSTR)lpszPassword;
// Add the user
NET_API_STATUS nStatus = ::NetUserAdd(NULL, 1, (LPBYTE)&ui, &m_dwLastError);
if(nStatus != NERR_Success)
{
// DEBUG ONLY
CString szErrorMsg;
szErrorMsg.Format(_T("Error code %d"), m_dwLastError);
::AfxMessageBox(szErrorMsg, MB_OK);
// DEBUG ONLY
return false;
}
return true;
}
It's being run under admin privileges. I can call other Network functions with out any problems (NetUserGetInfo, NetLocalGroupAddMembers).
I've experimented with different password sizes but I can happily create the same account with the same information using the Server Manager tool that comes with Windows 2008
Thanks
After looking at the status code rather than m_dwLastError it turns out it was NERR_PasswordTooShort as the minimum password requirement on a fresh Windows 2008 server is 8 characters.
I am trying to open a com port for reading and writing using C++ but I can't seem to pass the first stage of actually opening it. I get an INVALID_HANDLE_VALUE on the handle
with GetLastError FILE_NOT_FOUND. I have searched around the web for a couple of days I'm fresh out of ideas. I have searched through all the questions regarding COM on this website too.
I have scanned through the existing ports (or so I believe) to get the name of the port right.
I also tried combinations of _T("COM1") with the slashes, without the slashes, with colon, without colon and without the _T
I'm using windows 7 on 64 bit machine.
this is the code i got
I'll be glad for any input on this
void SendToCom(char* data, int len)
{
DWORD cbNeeded = 0;
DWORD dwPorts = 0;
EnumPorts(NULL, 1, NULL, 0, &cbNeeded, &dwPorts);
//What will be the return value
BOOL bSuccess = FALSE;
LPCSTR COM1 ;
BYTE* pPorts = static_cast<BYTE*>(malloc(cbNeeded));
bSuccess = EnumPorts(NULL, 1, pPorts, cbNeeded, &cbNeeded, &dwPorts);
if (bSuccess){
PORT_INFO_1* pPortInfo = reinterpret_cast<PORT_INFO_1*>(pPorts);
for (DWORD i=0; i<dwPorts; i++)
{
//If it looks like "COMX" then
size_t nLen = _tcslen(pPortInfo->pName);
if (nLen > 3)
{
if ((_tcsnicmp(pPortInfo->pName, _T("COM"), 3) == 0) ){
COM1 =pPortInfo->pName;
//COM1 ="\\\\.\\COM1";
HANDLE m_hCommPort = CreateFile( COM1 ,
GENERIC_READ|GENERIC_WRITE, // access ( read and write)
0, // (share) 0:cannot share the COM port
NULL, // security (None)
OPEN_EXISTING, // creation : open_existing
FILE_FLAG_OVERLAPPED, // we want overlapped operation
NULL // no templates file for COM port...
);
if (m_hCommPort==INVALID_HANDLE_VALUE)
{
DWORD err = GetLastError();
if (err == ERROR_FILE_NOT_FOUND) {
MessageBox(hWnd,"ERROR_FILE_NOT_FOUND",NULL,MB_ABORTRETRYIGNORE);
}
else
if(err == ERROR_INVALID_NAME) {
MessageBox(hWnd,"ERROR_INVALID_NAME",NULL,MB_ABORTRETRYIGNORE);
}
else
{
MessageBox(hWnd,"unkown error",NULL,MB_ABORTRETRYIGNORE);
}
}
else{
WriteAndReadPort(m_hCommPort,data);
}
}
pPortInfo++;
}
}
}
}
The Solution is to use
The Problem is, if your port is Bigger then 9 then you have to use the Syntax
LPCWSTR szPortName = L"\\\\.\\COM11";.
If you are on Windows 10 - running all system updates might help !
I had the same issue that opening port "COM4" returned an error ERROR_FILE_NOT_FOUND. When running the program as "Administrator" it worked. Now after a updating to 1511 the program can open "COM4" even not running as "Administrator".
http://www.cplusplus.com/forum/windows/163855/
Use CreateFileA(...) instead of CreateFile(...)
ERROR_FILE_NOT_FOUND can be produced from CreateFile(L"\\\\.\\COM1", ...) and CreateFile(L"COM1:", ...) after using the Device Manager to change the assigned COM Port number. Disabling and re-enabling the device, or unplugging and reconnecting the USB adapter resolves the issue.
A useful test to confirm whether it is your program or the system is to send data to the port in command prompt. A successful test will show an empty line. A failed test will show an error message.
C:\drop>echo > \\.\COM1
The system cannot find the file specified.
C:\drop>echo > \\.\COM1
C:\drop>
Here is the scenario:
I have a Windows Server 2008 with Terminal Server (No Domain Controller, No join to Domain)
I have a client machine with Windows XP SP3 updated (.NET 3.0 SP1 and .NET 4.0)
I'm Using Embarcadero C++Builder (BCB6)
I have a ticket printer (Thermal Printer, POS Printer, Epson, Zebra, etc.)
When I connect to the terminal server, the printer works OK. I tested printing a test page.
When I use my software to send the raw data in the terminal server on the local computer, I get this error:
Windows Presentation Foundation terminal server print W has encountered a
problem and needs to close. We are sorry for the inconvenience.
I followed the advice from this support page with no luck.
I used to print directly to LPT1:, but with Windows Server 2008 it's getting harder to make this work, so we have to change the way we print to this kind of printer.
Here is the code that I'm using. I tested locally and it works fine, but in the terminal server doesn't work:
bool TForm1::RawDataToPrinter(char* szPrinterName, char* lpData, unsigned int dwCount )
{
int BytesWritten;
HANDLE hPrinter;
TDocInfo1 DocInfo;
bool bStatus = false;
int dwJob = 0;
unsigned long dwBytesWritten = 0;
// Open a handle to the printer.
bStatus = OpenPrinter( szPrinterName, &hPrinter, NULL );
if( bStatus )
{
// Fill in the structure with info about this "document."
DocInfo.pDocName = "My Document";
DocInfo.pOutputFile = NULL;
DocInfo.pDatatype = "RAW";
// to indicate that the application will be sending document data to the printer.
dwJob = StartDocPrinter( hPrinter, 1, (LPBYTE)&DocInfo );
if ( dwJob > 0 )
{
// Start a page.
bStatus = StartPagePrinter( hPrinter );
bStatus = true;
if( bStatus )
{
// Send the data to the printer.
bStatus = WritePrinter( hPrinter, lpData, dwCount, &dwBytesWritten );
EndPagePrinter ( hPrinter );
}
// Inform the spooler that the document is ending.
EndDocPrinter( hPrinter );
}
// Close the printer handle.
ClosePrinter( hPrinter );
}
// Check to see if correct number of bytes were written.
if (!bStatus || (dwBytesWritten != dwCount))
bStatus = false;
else
bStatus = true;
return bStatus;
}
I copied this code from a example in Microsoft's Support. I also tried changing the "RAW" to "TEXT" but I get the same error.
I tried this code, because it uses the GDI to print:
long pageline;
char prueba[255];
Printer()->SetPrinter(ListBox1->Items->Strings[ListBox1->ItemIndex].c_str(), "WINSPOOL", "", NULL);
Printer()->BeginDoc();
pageline = 0;
while(pageline < Memo1->Lines->Count)
{
Printer()->Canvas->TextOut(10, (10 + Printer()->Canvas->TextHeight("Hi! There")) * pageline, Memo1->Lines->Strings[pageline]);
pageline++;
}
Printer()->EndDoc();
This is a example that I found in the Embarcadero Forum.
I also verified TsWpfWrp.exe. I tried replacing it by the one in the server, but it does nothing, doesn't send the error, but also won't send any data.
There is another way to do this? Do I have something wrong in the code?
I appreciated any help or insight.
I found the problem, is the Easy Print driver, it expect in RAW Mode the XPS specification, but I was sending only text.
I disabled the Easy Print to put the printer in Fallback mode( something like that), this is where the Terminal Server, first it look for the installed driver then for the Easy Print (this can be verified in the properties of the printer in advanced options).
Now it works, thanks.