119 lines
2.6 KiB
C++
119 lines
2.6 KiB
C++
// File: syspol.cpp
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//
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// System policies
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//
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// This class tries to be efficient by only opening the key once
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// and using KEY_QUERY_VALUE.
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//
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// Normally the policy keys don't exist, so the default setting is very important.
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#include "precomp.h"
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#include "syspol.h"
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HKEY SysPol::m_hkey = NULL;
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/* F E N S U R E K E Y O P E N */
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/*-------------------------------------------------------------------------
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%%Function: FEnsureKeyOpen
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-------------------------------------------------------------------------*/
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bool SysPol::FEnsureKeyOpen(void)
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{
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if (NULL == m_hkey)
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{
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long lErr = ::RegOpenKeyEx(HKEY_CURRENT_USER, POLICIES_KEY, 0, KEY_QUERY_VALUE, &m_hkey);
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if (ERROR_SUCCESS != lErr)
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{
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WARNING_OUT(("FEnsureKeyOpen: problem opening system policy key. Err=%08X", lErr));
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return false;
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}
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}
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return true;
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}
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void SysPol::CloseKey(void)
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{
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if (NULL != m_hkey)
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{
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::RegCloseKey(m_hkey);
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m_hkey = NULL;
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}
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}
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/* G E T N U M B E R */
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/*-------------------------------------------------------------------------
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%%Function: GetNumber
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-------------------------------------------------------------------------*/
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DWORD SysPol::GetNumber(LPCTSTR pszName, DWORD dwDefault)
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{
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if (FEnsureKeyOpen())
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{
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DWORD dwType = REG_BINARY;
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DWORD dwValue = 0L;
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DWORD dwSize = sizeof(dwValue);
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long lErr = ::RegQueryValueEx(m_hkey, pszName, 0, &dwType, (LPBYTE)&dwValue, &dwSize);
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if ((lErr == ERROR_SUCCESS) &&
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((REG_DWORD == dwType) || ((REG_BINARY == dwType) && (sizeof(dwValue) == dwSize))) )
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{
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dwDefault = dwValue;
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}
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}
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return dwDefault;
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}
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//////////////////////
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// Positive Settings
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bool SysPol::AllowDirectoryServices(void)
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{
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return (0 == GetNumber(REGVAL_POL_NO_DIRECTORY_SERVICES, DEFAULT_POL_NO_DIRECTORY_SERVICES));
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}
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bool SysPol::AllowAddingServers(void)
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{
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if (!AllowDirectoryServices())
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return FALSE;
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return (0 == GetNumber(REGVAL_POL_NO_ADDING_NEW_ULS, DEFAULT_POL_NO_ADDING_NEW_ULS));
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}
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//////////////////////
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// Negative Settings
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bool SysPol::NoAudio(void)
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{
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return (0 != GetNumber(REGVAL_POL_NO_AUDIO, DEFAULT_POL_NO_AUDIO));
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}
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bool SysPol::NoVideoSend(void)
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{
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return (0 != GetNumber(REGVAL_POL_NO_VIDEO_SEND, DEFAULT_POL_NO_VIDEO_SEND));
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}
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bool SysPol::NoVideoReceive(void)
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{
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return (0 != GetNumber(REGVAL_POL_NO_VIDEO_RECEIVE, DEFAULT_POL_NO_VIDEO_RECEIVE));
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}
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UINT SysPol::GetMaximumBandwidth()
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{
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UINT uRet;
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RegEntry re(POLICIES_KEY, HKEY_CURRENT_USER, FALSE);
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uRet = re.GetNumberIniStyle(REGVAL_POL_MAX_BANDWIDTH, 0);
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return uRet;
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}
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