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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include <rfb_win32/TsSessions.h>
#include <rfb_win32/DynamicFn.h>
#include <rfb/LogWriter.h>
#include <rdr/Exception.h>
#include <tchar.h>
#ifdef ERROR_CTX_WINSTATION_BUSY
#define RFB_HAVE_WINSTATION_CONNECT
#else
#pragma message(" NOTE: Not building WinStationConnect support.")
#endif
static rfb::LogWriter vlog("TsSessions");
namespace rfb {
namespace win32 {
// Windows XP (and later) functions used to handle session Ids
typedef BOOLEAN (WINAPI *_WinStationConnect_proto) (HANDLE,ULONG,ULONG,PCWSTR,ULONG);
DynamicFn<_WinStationConnect_proto> _WinStationConnect(_T("winsta.dll"), "WinStationConnectW");
typedef DWORD (WINAPI *_WTSGetActiveConsoleSessionId_proto) ();
DynamicFn<_WTSGetActiveConsoleSessionId_proto> _WTSGetActiveConsoleSessionId(_T("kernel32.dll"), "WTSGetActiveConsoleSessionId");
typedef BOOL (WINAPI *_ProcessIdToSessionId_proto) (DWORD, DWORD*);
DynamicFn<_ProcessIdToSessionId_proto> _ProcessIdToSessionId(_T("kernel32.dll"), "ProcessIdToSessionId");
typedef BOOL (WINAPI *_LockWorkStation_proto)();
DynamicFn<_LockWorkStation_proto> _LockWorkStation(_T("user32.dll"), "LockWorkStation");
ProcessSessionId::ProcessSessionId(DWORD processId) {
id = 0;
if (!_ProcessIdToSessionId.isValid())
return;
if (processId == -1)
processId = GetCurrentProcessId();
if (!(*_ProcessIdToSessionId)(GetCurrentProcessId(), &id))
throw rdr::SystemException("ProcessIdToSessionId", GetLastError());
}
ProcessSessionId mySessionId;
ConsoleSessionId::ConsoleSessionId() {
if (_WTSGetActiveConsoleSessionId.isValid())
id = (*_WTSGetActiveConsoleSessionId)();
else
id = 0;
}
bool inConsoleSession() {
ConsoleSessionId console;
return console.id == mySessionId.id;
}
void setConsoleSession(DWORD sessionId) {
#ifdef RFB_HAVE_WINSTATION_CONNECT
if (!_WinStationConnect.isValid())
throw rdr::Exception("WinSta APIs missing");
if (sessionId == -1)
sessionId = mySessionId.id;
// Try to reconnect our session to the console
ConsoleSessionId console;
vlog.info("Console session is %d", console.id);
if (!(*_WinStationConnect)(0, sessionId, console.id, L"", 0))
throw rdr::SystemException("Unable to connect session to Console", GetLastError());
// Lock the newly connected session, for security
if (_LockWorkStation.isValid())
(*_LockWorkStation)();
#else
throw rdr::Exception("setConsoleSession not implemented");
#endif
}
};
};
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