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windows-nt/Source/XPSP1/NT/shell/cpls/utc/inettime.cpp

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/*****************************************************************************\
FILE: inettime.cpp
DESCRIPTION:
This file contains the code used to display UI allowing the user to
control the feature that updates the computer's clock from an internet
NTP time server.
BryanSt 3/22/2000
Copyright (C) Microsoft Corp 2000-2000. All rights reserved.
\*****************************************************************************/
#include "timedate.h"
#include "inettime.h"
#include "rc.h"
#include <wininet.h>
#include <shlwapi.h>
#include <DSGetDC.h> // For DsGetDcName
#include <help.h> // For IDH_DATETIME_*
#include <Lm.h> // For NetGetJoinInformation() and NETSETUP_JOIN_STATUS
#include <Lmjoin.h> // For NetGetJoinInformation() and NETSETUP_JOIN_STATUS
#include <shlobj.h>
#include <shlobjp.h>
#include <w32timep.h> // For Time APIs
#include <shellp.h>
#include <ccstock.h>
#include <shpriv.h>
#define DECL_CRTFREE
#include <crtfree.h>
#define DISALLOW_Assert // Force to use ASSERT instead of Assert
#define DISALLOW_DebugMsg // Force to use TraceMsg instead of DebugMsg
#include <debug.h>
// Reg Keys and Values
#define SZ_REGKEY_DATETIME TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\DateTime")
#define SZ_REGKEY_DATETIME_SERVERS TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\DateTime\\Servers")
#define SZ_REGKEY_W32TIME_SERVICE TEXT("System\\CurrentControlSet\\Services\\W32Time")
#define SZ_REGKEY_W32TIME_SERVICE_NTPCLIENT SZ_REGKEY_W32TIME_SERVICE TEXT("\\TimeProviders\\NtpClient")
#define SZ_REGKEY_W32TIME_SERVICE_PARAMETERS SZ_REGKEY_W32TIME_SERVICE TEXT("\\Parameters")
#define SZ_REGVALUE_INTERNET_FEATURE_AVAILABLE TEXT("Support Internet Time")
#define SZ_REGVALUE_TEST_SIMULATENODC TEXT("TestSimulateNoDC") // Used to simulate home scenarios while we have a domain controller
#define SZ_REGVALUE_W32TIME_SYNCFROMFLAGS TEXT("Type")
#define SZ_REGVALUE_W32TIME_STARTSERVICE TEXT("Start")
#define SZ_REGVALUE_NTPSERVERLIST TEXT("NtpServer") // Was "ManualPeerList" in Whistler for a little while.
#define SZ_DEFAULT_NTP_SERVER TEXT("time.windows.gov")
#define SZ_INDEXTO_CUSTOMHOST TEXT("0")
#define SZ_SERVICE_W32TIME TEXT("w32time")
#define SZ_DIFFERENT_SYNCFREQUENCY TEXT(",0x1")
#define SZ_SYNC_BOTH TEXT("AllSync")
#define SZ_SYNC_DS TEXT("NT5DS")
#define SZ_SYNC_NTP TEXT("NTP")
#define SZ_SYNC_NONE TEXT("NoSync")
#define SYNC_ONCE_PER_WEEK 0x93A80 // This is once a week. (Sync every this many seconds)
// Flags for "System\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient","SyncFromFlags"
#define NCSF_ManualPeerList 0x01 // This means use internet SNTP servers.
#define NCSF_DomainHierarchy 0x02 // This means get the time
// this feature is turned off temporarily until we can get the perf hit reduced.
// The problem is that the call to DsGetDcName() can take up to 15 seconds if
// a domain controller can not be found.
#define FEATURE_INTERNET_TIME TRUE
#define MAX_URL_STRING INTERNET_MAX_URL_LENGTH
#define WMUSER_UPDATED_STATUS_TEXT (WM_USER + 11)
// If we aren't using the new w32timep.h, then define it our selves.
// TODO: Nuke this after \nt\ds\ RIs into main.
#ifndef TimeSyncFlag_SoftResync
#define TimeSyncFlag_ReturnResult 0x02
#define TimeSyncFlag_Rediscover 0x04
#define ResyncResult_Success 0x00
#define ResyncResult_ChangeTooBig 0x04
typedef struct _W32TIME_NTP_PEER_INFO {
unsigned __int32 ulSize;
unsigned __int32 ulResolveAttempts;
unsigned __int64 u64TimeRemaining;
unsigned __int64 u64LastSuccessfulSync;
unsigned __int32 ulLastSyncError;
unsigned __int32 ulLastSyncErrorMsgId;
unsigned __int32 ulValidDataCounter;
unsigned __int32 ulAuthTypeMsgId;
#ifdef MIDL_PASS
[string, unique]
wchar_t *wszUniqueName;
#else // MIDL_PASS
LPWSTR wszUniqueName;
#endif // MIDL_PASS
unsigned char ulMode;
unsigned char ulStratum;
unsigned char ulReachability;
unsigned char ulPeerPollInterval;
unsigned char ulHostPollInterval;
} W32TIME_NTP_PEER_INFO, *PW32TIME_NTP_PEER_INFO;
typedef struct _W32TIME_NTP_PROVIDER_DATA {
unsigned __int32 ulSize;
unsigned __int32 ulError;
unsigned __int32 ulErrorMsgId;
unsigned __int32 cPeerInfo;
#ifdef MIDL_PASS
[size_is(cPeerInfo)]
#endif // MIDL_PASS
W32TIME_NTP_PEER_INFO *pPeerInfo;
} W32TIME_NTP_PROVIDER_DATA, *PW32TIME_NTP_PROVIDER_DATA;
#endif // TimeSyncFlag_SoftResync
//============================================================================================================
// *** Globals ***
//============================================================================================================
const static DWORD aInternetTimeHelpIds[] = {
DATETIME_AUTOSETFROMINTERNET, IDH_DATETIME_AUTOSETFROMINTERNET,
DATETIME_INTERNET_SERVER_LABLE, IDH_DATETIME_SERVER_EDIT,
DATETIME_INTERNET_SERVER_EDIT, IDH_DATETIME_SERVER_EDIT,
DATETIME_INFOTEXTTOP, IDH_DATETIME_INFOTEXT,
DATETIME_INFOTEXTPROXY, IDH_DATETIME_INFOTEXT,
DATETIME_INTERNET_ERRORTEXT, IDH_DATETIME_INFOTEXT,
DATETIME_INTERNET_UPDATENOW, IDH_DATETIME_UPDATEFROMINTERNET,
0, 0
};
#define SZ_HELPFILE_INTERNETTIME TEXT("windows.hlp")
#define HINST_THISDLL g_hInst
BOOL g_fCustomServer;
BOOL g_fWriteAccess = FALSE; // Does the user have the ACLs set correctly to change the HKLM setting to turn the service on/off or change the server hostname?
HINSTANCE g_hInstW32Time = NULL;
void _LoadW32Time(void)
{
if (!g_hInstW32Time)
{
g_hInstW32Time = LoadLibrary(TEXT("w32time.dll"));
}
}
HRESULT StrReplaceToken(IN LPCTSTR pszToken, IN LPCTSTR pszReplaceValue, IN LPTSTR pszString, IN DWORD cchSize)
{
HRESULT hr = S_OK;
LPTSTR pszTempLastHalf = NULL;
LPTSTR pszNextToken = pszString;
while (0 != (pszNextToken = StrStrI(pszNextToken, pszToken)))
{
// We found one.
LPTSTR pszPastToken = pszNextToken + lstrlen(pszToken);
Str_SetPtr(&pszTempLastHalf, pszPastToken); // Keep a copy because we will overwrite it.
pszNextToken[0] = 0; // Remove the rest of the string.
StrCatBuff(pszString, pszReplaceValue, cchSize);
StrCatBuff(pszString, pszTempLastHalf, cchSize);
pszNextToken += lstrlen(pszReplaceValue);
}
Str_SetPtr(&pszTempLastHalf, NULL);
return hr;
}
typedef DWORD (* PFNW32TimeSyncNow) (IN LPCWSTR pwszServer, IN ULONG ulWaitFlag, IN ULONG ulFlags);
typedef DWORD (* PFNW32TimeQueryNTPProviderStatus) (IN LPCWSTR pwszServer, IN DWORD dwFlags, IN LPWSTR pwszProvider, OUT W32TIME_NTP_PROVIDER_DATA **ppNTPProviderData);
typedef void (* PFNW32TimeBufferFree) (IN LPVOID pvBuffer);
typedef HRESULT (* PFNW32TimeQueryConfig) (IN DWORD dwProperty, OUT DWORD * pdwType, IN OUT BYTE * pbConfig, IN OUT DWORD * pdwSize);
typedef HRESULT (* PFNW32TimeSetConfig) (IN DWORD dwProperty, IN DWORD dwType, IN BYTE * pbConfig, IN DWORD dwSize);
DWORD W32TimeSyncNowDDLoad(IN LPCWSTR pwszServer, IN ULONG ulWaitFlag, IN ULONG ulFlags)
{
DWORD dwReturn = ERROR_UNEXP_NET_ERR;
// Hand delay load until DS RIs.
_LoadW32Time();
if (g_hInstW32Time)
{
PFNW32TimeSyncNow pfnFunction = (PFNW32TimeSyncNow) GetProcAddress(g_hInstW32Time, "W32TimeSyncNow");
if (pfnFunction)
{
dwReturn = pfnFunction(pwszServer, ulWaitFlag, ulFlags);
}
}
return dwReturn;
}
DWORD W32TimeQueryNTPProviderStatusDDload(IN LPCWSTR pwszServer, IN DWORD dwFlags, IN LPWSTR pwszProvider, OUT W32TIME_NTP_PROVIDER_DATA **ppNTPProviderData)
{
DWORD dwReturn = ERROR_UNEXP_NET_ERR;
*ppNTPProviderData = NULL;
// Hand delay load until DS RIs.
_LoadW32Time();
if (g_hInstW32Time)
{
PFNW32TimeQueryNTPProviderStatus pfnFunction = (PFNW32TimeQueryNTPProviderStatus) GetProcAddress(g_hInstW32Time, "W32TimeQueryNTPProviderStatus");
if (pfnFunction)
{
dwReturn = pfnFunction(pwszServer, dwFlags, pwszProvider, ppNTPProviderData);
}
}
return dwReturn;
}
void W32TimeBufferFreeDDload(IN LPVOID pvBuffer)
{
// Hand delay load until DS RIs.
_LoadW32Time();
if (g_hInstW32Time)
{
PFNW32TimeBufferFree pfnFunction = (PFNW32TimeBufferFree) GetProcAddress(g_hInstW32Time, "W32TimeBufferFree");
if (pfnFunction)
{
pfnFunction(pvBuffer);
}
}
}
HRESULT W32TimeQueryConfigDDload(IN DWORD dwProperty, OUT DWORD * pdwType, IN OUT BYTE * pbConfig, IN OUT DWORD * pdwSize)
{
HRESULT hr = ResultFromWin32(ERROR_PROC_NOT_FOUND);
// Hand delay load until DS RIs.
_LoadW32Time();
if (g_hInstW32Time)
{
PFNW32TimeQueryConfig pfnFunction = (PFNW32TimeQueryConfig) GetProcAddress(g_hInstW32Time, "W32TimeQueryConfig");
if (pfnFunction)
{
hr = pfnFunction(dwProperty, pdwType, pbConfig, pdwSize);
}
}
return hr;
}
HRESULT W32TimeSetConfigDDload(IN DWORD dwProperty, IN DWORD dwType, IN BYTE * pbConfig, IN DWORD dwSize)
{
HRESULT hr = ResultFromWin32(ERROR_PROC_NOT_FOUND);
// Hand delay load until DS RIs.
_LoadW32Time();
if (g_hInstW32Time)
{
PFNW32TimeSetConfig pfnFunction = (PFNW32TimeSetConfig) GetProcAddress(g_hInstW32Time, "W32TimeSetConfig");
if (pfnFunction)
{
hr = pfnFunction(dwProperty, dwType, pbConfig, dwSize);
}
}
return hr;
}
// Turn this on when vbl1 RIs and w32timep.h contains W32TimeQueryConfig, W32TimeSetConfig
//#define W32TIME_NEWAPIS
HRESULT GetW32TimeServer(BOOL fRemoveJunk, LPWSTR pszServer, DWORD cchSize)
{
DWORD dwType = REG_SZ;
DWORD cbSize = (sizeof(pszServer[0]) * cchSize);
HRESULT hr = W32TimeQueryConfigDDload(W32TIME_CONFIG_MANUAL_PEER_LIST, &dwType, (BYTE *) pszServer, &cbSize);
if (ResultFromWin32(ERROR_PROC_NOT_FOUND) == hr)
{
DWORD dwError = SHGetValue(HKEY_LOCAL_MACHINE, SZ_REGKEY_W32TIME_SERVICE_PARAMETERS, SZ_REGVALUE_NTPSERVERLIST, NULL, (BYTE *)pszServer, &cbSize);
hr = ResultFromWin32(dwError);
}
if (SUCCEEDED(hr) && fRemoveJunk)
{
LPWSTR pszJunk = StrStr(pszServer, L",0x");
if (pszJunk)
{
pszJunk[0] = 0;
}
pszJunk = StrStr(pszServer, L" ");
if (pszJunk)
{
pszJunk[0] = 0;
}
}
return hr;
}
HRESULT RemoveDuplicateServers(LPWSTR pszServer, DWORD cchSize)
{
TCHAR szResults[MAX_URL_STRING];
StrCpyN(szResults, pszServer, ARRAYSIZE(szResults));
LPTSTR pszBeginning = szResults;
LPTSTR pszEnd;
while (NULL != (pszEnd = StrChr(pszBeginning, TEXT(' '))))
{
TCHAR szSearchStr[MAX_PATH];
StrCpyN(szSearchStr, pszBeginning, (DWORD)min(ARRAYSIZE(szSearchStr), (pszEnd - pszBeginning + 1)));
pszEnd++; // Skip past the space
StrCatBuff(szSearchStr, L" ", ARRAYSIZE(szSearchStr));
StrReplaceToken(szSearchStr, TEXT(""), pszEnd, (ARRAYSIZE(szResults) - (DWORD)(pszEnd - pszBeginning)));
szSearchStr[lstrlen(szSearchStr)-1] = 0;
StrReplaceToken(szSearchStr, TEXT(""), pszEnd, (ARRAYSIZE(szResults) - (DWORD)(pszEnd - pszBeginning)));
pszBeginning = pszEnd;
}
PathRemoveBlanks(szResults);
StrCpyN(pszServer, szResults, cchSize);
return S_OK;
}
BOOL ComparePeers(LPTSTR szPeer1, LPTSTR szPeer2) {
BOOL fResult;
LPTSTR szFlags1;
LPTSTR szFlags2;
TCHAR szSave1;
TCHAR szSave2;
szFlags1 = StrChr(szPeer1, TEXT(','));
if (NULL == szFlags1)
{
szFlags1 = StrChr(szPeer1, TEXT(' '));
}
szFlags2 = StrChr(szPeer2, TEXT(','));
if (NULL == szFlags2)
{
szFlags2 = StrChr(szPeer2, TEXT(' '));
}
if (NULL != szFlags1) {
szSave1 = szFlags1[0];
szFlags1[0] = TEXT('\0');
}
if (NULL != szFlags2) {
szSave2 = szFlags2[0];
szFlags2[0] = TEXT('\0');
}
fResult = 0 == StrCmpI(szPeer1, szPeer2);
if (NULL != szFlags1) {
szFlags1[0] = szSave1;
}
if (NULL != szFlags2) {
szFlags2[0] = szSave2;
}
return fResult;
}
BOOL ContainsServer(LPWSTR pwszServerList, LPWSTR pwszServer)
{
DWORD dwNextServerOffset = 0;
LPWSTR pwszNext = pwszServerList;
while (NULL != pwszNext)
{
pwszNext += dwNextServerOffset;
if (ComparePeers(pwszNext, pwszServer))
{
return TRUE;
}
pwszNext = StrChr(pwszNext, TEXT(' '));
dwNextServerOffset = 1;
}
return FALSE;
}
HRESULT AddTerminators(LPWSTR pszServer, DWORD cchSize)
{
TCHAR szServer[MAX_URL_STRING];
TCHAR szTemp[MAX_URL_STRING];
szTemp[0] = 0;
StrCpyN(szServer, pszServer, ARRAYSIZE(szServer));
LPTSTR pszBeginning = szServer;
LPTSTR pszEnd;
while (NULL != (pszEnd = StrChr(pszBeginning, TEXT(' '))))
{
TCHAR szTemp2[MAX_PATH];
pszEnd[0] = 0;
if (!StrStrI(pszBeginning, L",0x"))
{
wnsprintf(szTemp2, ARRAYSIZE(szTemp2), TEXT("%s,0x1 "), pszBeginning);
StrCatBuff(szTemp, szTemp2, ARRAYSIZE(szTemp));
}
else
{
StrCatBuff(szTemp, pszBeginning, ARRAYSIZE(szTemp));
StrCatBuff(szTemp, L" ", ARRAYSIZE(szTemp));
}
pszBeginning = &pszEnd[1];
}
StrCatBuff(szTemp, pszBeginning, ARRAYSIZE(szTemp));
if (pszBeginning[0] && szTemp[0] && !StrStrI(pszBeginning, L",0x"))
{
// We need to indicate which kind of sync method
StrCatBuff(szTemp, L",0x1", ARRAYSIZE(szTemp));
}
StrCpyN(pszServer, szTemp, cchSize);
return S_OK;
}
HRESULT SetW32TimeServer(LPCWSTR pszServer)
{
TCHAR szServer[MAX_PATH];
StrCpyN(szServer, pszServer, ARRAYSIZE(szServer));
AddTerminators(szServer, ARRAYSIZE(szServer));
RemoveDuplicateServers(szServer, ARRAYSIZE(szServer));
DWORD cbSize = ((lstrlen(szServer) + 1) * sizeof(szServer[0]));
HRESULT hr = W32TimeSetConfigDDload(W32TIME_CONFIG_MANUAL_PEER_LIST, REG_SZ, (BYTE *) szServer, cbSize);
if (ResultFromWin32(ERROR_PROC_NOT_FOUND) == hr)
{
DWORD dwError = SHSetValue(HKEY_LOCAL_MACHINE, SZ_REGKEY_W32TIME_SERVICE_PARAMETERS, SZ_REGVALUE_NTPSERVERLIST, REG_SZ, (BYTE *)szServer, cbSize);
hr = ResultFromWin32(dwError);
}
return hr;
}
HRESULT SetW32TimeSyncFreq(DWORD dwSyncFreq)
{
#ifndef W32TIME_NEWAPIS
return S_OK;
#else // W32TIME_NEWAPIS
return W32TimeSetConfig(W32TIME_CONFIG_SPECIAL_POLL_INTERVAL, REG_DWORD, (BYTE *) dwSyncFreq, sizeof(dwSyncFreq));
#endif // W32TIME_NEWAPIS
}
enum eBackgroundThreadAction
{
eBKAWait = 0, // The bkthread should wait for a command
eBKAGetInfo, // The bkthread should get the info on the last sync
eBKAUpdate, // The bkthread should start synching
eBKAUpdating, // The bkthread is synching now
eBKAQuit, // The bkthread should shut down
};
class CInternetTime
{
public:
// Forground methods
BOOL IsInternetTimeAvailable(void);
HRESULT AddInternetPage(void);
INT_PTR _AdvancedDlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam);
CInternetTime(HWND hDlg, HWND hwndDate);
virtual ~CInternetTime(void);
// Background methods
void AsyncCheck(void);
private:
// Private Member Variables
HWND m_hDlg; // hwnd of parent (property sheet).
HWND m_hwndDate; // Date tab hwnd
HWND m_hwndInternet; // InternetTime tab hwnd
HCURSOR m_hCurOld; // The old cursor while we display the wait cursor
LPTSTR m_pszStatusString; // CROSS-THREAD: This is used to pass between threads.
LPTSTR m_pszNextSyncTime; // CROSS-THREAD: This is used to pass between threads.
eBackgroundThreadAction m_eAction; // CROSS-THREAD: This is used to pass between threads.
// Private Member Functions
// Forground methods
HRESULT _InitAdvancedPage(HWND hDlg);
HRESULT _OnUpdateButton(void);
HRESULT _OnUpdateStatusString(void);
HRESULT _OnSetFeature(HWND hDlg, BOOL fOn);
HRESULT _OnToggleFeature(HWND hDlg);
HRESULT _GoGetHelp(void);
HRESULT _ResetServer(void);
HRESULT _PersistInternetTimeSettings(HWND hDlg);
HRESULT _StartServiceAndRefresh(BOOL fStartIfOff);
INT_PTR _OnCommandAdvancedPage(HWND hDlg, WPARAM wParam, LPARAM lParam);
INT_PTR _OnNotifyAdvancedPage(HWND hDlg, NMHDR * pNMHdr, int idControl);
// Background methods
HRESULT _ProcessBkThreadActions(void);
HRESULT _SyncNow(BOOL fOnlyUpdateInfo);
HRESULT _CreateW32TimeSuccessErrorString(DWORD dwError, LPTSTR pszString, DWORD cchSize, LPTSTR pszNextSync, DWORD cchNextSyncSize, LPTSTR pszServerToQuery);
HRESULT _GetDateTimeString(FILETIME * pftTimeDate, BOOL fDate, LPTSTR pszString, DWORD cchSize);
};
CInternetTime * g_pInternetTime = NULL;
// This function is called on the forground thread.
CInternetTime::CInternetTime(HWND hDlg, HWND hwndDate)
{
m_hDlg = hDlg;
m_hwndDate = hwndDate;
m_eAction = eBKAGetInfo;
m_pszStatusString = NULL;
m_hwndInternet = NULL;
m_hCurOld = NULL;
m_pszStatusString = NULL;
m_pszNextSyncTime = NULL;
}
CInternetTime::~CInternetTime()
{
ENTERCRITICAL;
if (m_pszStatusString)
{
LocalFree(m_pszStatusString);
m_pszStatusString = NULL;
}
if (m_pszNextSyncTime)
{
LocalFree(m_pszNextSyncTime);
m_pszNextSyncTime = NULL;
}
if (m_hCurOld)
{
SetCursor(m_hCurOld);
m_hCurOld = NULL;
}
LEAVECRITICAL;
}
HRESULT FormatMessageWedge(LPCWSTR pwzTemplate, LPWSTR pwzStrOut, DWORD cchSize, ...)
{
va_list vaParamList;
HRESULT hr = S_OK;
va_start(vaParamList, cchSize);
if (0 == FormatMessageW(FORMAT_MESSAGE_FROM_STRING, pwzTemplate, 0, 0, pwzStrOut, cchSize, &vaParamList))
{
hr = ResultFromLastError();
}
va_end(vaParamList);
return hr;
}
/////////////////////////////////////////////////////////////////////
// Private Internal Helpers
/////////////////////////////////////////////////////////////////////
// This function is called on the forground thread.
HRESULT CInternetTime::_OnSetFeature(HWND hDlg, BOOL fOn)
{
HWND hwndOnOffCheckbox = GetDlgItem(m_hwndInternet, DATETIME_AUTOSETFROMINTERNET);
HWND hwndServerLable = GetDlgItem(m_hwndInternet, DATETIME_INTERNET_SERVER_LABLE);
HWND hwndServerEdit = GetDlgItem(m_hwndInternet, DATETIME_INTERNET_SERVER_EDIT);
CheckDlgButton(hDlg, DATETIME_AUTOSETFROMINTERNET, (fOn ? BST_CHECKED : BST_UNCHECKED));
EnableWindow(hwndOnOffCheckbox, g_fWriteAccess);
EnableWindow(hwndServerLable, (g_fWriteAccess ? fOn : FALSE));
EnableWindow(hwndServerEdit, (g_fWriteAccess ? fOn : FALSE));
EnableWindow(GetDlgItem(m_hwndInternet, DATETIME_INTERNET_ERRORTEXT), (g_fWriteAccess ? fOn : FALSE));
EnableWindow(GetDlgItem(m_hwndInternet, DATETIME_INTERNET_UPDATENOW), (g_fWriteAccess ? fOn : FALSE));
EnableWindow(GetDlgItem(m_hwndInternet, DATETIME_INFOTEXTTOP), (g_fWriteAccess ? fOn : FALSE));
if (fOn)
{
// If the user just turned on the feature and the editbox is empty,
// replace the text with the default server name.
TCHAR szServer[INTERNET_MAX_HOST_NAME_LENGTH];
if (!GetWindowText(hwndServerEdit, szServer, ARRAYSIZE(szServer)) ||
!szServer[0])
{
SetWindowText(hwndServerEdit, SZ_DEFAULT_NTP_SERVER);
}
}
return S_OK;
}
// This function is called on the forground thread.
HRESULT CInternetTime::_OnToggleFeature(HWND hDlg)
{
BOOL fIsFeatureOn = ((BST_CHECKED == IsDlgButtonChecked(hDlg, DATETIME_AUTOSETFROMINTERNET)) ? TRUE : FALSE);
PropSheet_Changed(GetParent(hDlg), hDlg); // Say we need to enable the apply button
return _OnSetFeature(hDlg, fIsFeatureOn);
}
// This function is called on the forground thread.
HRESULT AddServerList(HWND hwndCombo, HKEY hkey, int nIndex)
{
TCHAR szServer[INTERNET_MAX_HOST_NAME_LENGTH];
DWORD cbSizeServer = sizeof(szServer);
TCHAR szIndex[MAX_PATH];
DWORD dwType;
wnsprintf(szIndex, ARRAYSIZE(szIndex), TEXT("%d"), nIndex);
DWORD dwError = SHGetValue(hkey, NULL, szIndex, &dwType, (void *)szServer, &cbSizeServer);
HRESULT hr = ResultFromWin32(dwError);
if (SUCCEEDED(hr))
{
LPTSTR pszFlags = StrStr(szServer, SZ_DIFFERENT_SYNCFREQUENCY);
if (pszFlags)
{
pszFlags[0] = 0; // Remove the flags.
}
dwError = ComboBox_AddString(hwndCombo, szServer);
if ((dwError == CB_ERR) || (dwError == CB_ERRSPACE))
{
hr = E_FAIL;
}
}
return hr;
}
// This function is called on the forground thread.
HRESULT PopulateComboBox(IN HWND hwndCombo, IN BOOL * pfCustomServer)
{
HRESULT hr;
HKEY hkey;
*pfCustomServer = FALSE;
DWORD dwError = RegOpenKeyEx(HKEY_LOCAL_MACHINE, SZ_REGKEY_DATETIME_SERVERS, 0, KEY_READ, &hkey);
hr = ResultFromWin32(dwError);
if (SUCCEEDED(hr))
{
// Try to add the custom slot.
if (SUCCEEDED(AddServerList(hwndCombo, hkey, 0)))
{
// We do have an existing custom server, so let the caller know so
// they know to increase the index by 1.
*pfCustomServer = TRUE;
}
for (int nIndex = 1; SUCCEEDED(hr); nIndex++)
{
hr = AddServerList(hwndCombo, hkey, nIndex);
}
RegCloseKey(hkey);
}
return hr;
}
// This function is called on the forground thread.
HRESULT CInternetTime::_OnUpdateButton(void)
{
HRESULT hr = S_OK;
ENTERCRITICAL;
// We don't need to do anything if it's already working on another task.
if (eBKAWait == m_eAction)
{
TCHAR szMessage[2 * MAX_PATH];
TCHAR szTemplate[MAX_PATH];
TCHAR szServer[MAX_PATH];
if (!m_hCurOld)
{
m_hCurOld = SetCursor(LoadCursor(NULL, IDC_WAIT));
}
LoadString(HINST_THISDLL, IDS_IT_WAITFORSYNC, szTemplate, ARRAYSIZE(szTemplate));
GetWindowText(GetDlgItem(m_hwndInternet, DATETIME_INTERNET_SERVER_EDIT), szServer, ARRAYSIZE(szServer));
FormatMessageWedge(szTemplate, szMessage, ARRAYSIZE(szMessage), szServer);
SetWindowText(GetDlgItem(m_hwndInternet, DATETIME_INTERNET_ERRORTEXT), szMessage);
m_eAction = eBKAUpdate;
}
LEAVECRITICAL;
return hr;
}
// This function is called on the forground thread.
BOOL IsManualPeerListOn(void)
{
BOOL fIsManualPeerListOn = TRUE;
TCHAR szSyncType[MAX_PATH];
DWORD cbSize = sizeof(szSyncType);
DWORD dwType;
if (ERROR_SUCCESS == SHGetValue(HKEY_LOCAL_MACHINE, SZ_REGKEY_W32TIME_SERVICE_PARAMETERS, SZ_REGVALUE_W32TIME_SYNCFROMFLAGS, &dwType, (LPBYTE)szSyncType, &cbSize))
{
if (!StrCmpI(szSyncType, SZ_SYNC_DS) || !StrCmpI(szSyncType, SZ_SYNC_NONE))
{
fIsManualPeerListOn = FALSE;
}
}
return fIsManualPeerListOn;
}
// This function is called on the forground thread.
HRESULT CInternetTime::_InitAdvancedPage(HWND hDlg)
{
DWORD dwType;
TCHAR szIndex[MAX_PATH];
HWND hwndServerEdit = GetDlgItem(hDlg, DATETIME_INTERNET_SERVER_EDIT);
HWND hwndOnOffCheckbox = GetDlgItem(hDlg, DATETIME_AUTOSETFROMINTERNET);
DWORD cbSize = sizeof(szIndex);
BOOL fIsFeatureOn = IsManualPeerListOn();
m_hwndInternet = hDlg;
HRESULT hr = PopulateComboBox(hwndServerEdit, &g_fCustomServer);
// Does the user have access to change the setting in the registry?
HKEY hKeyTemp;
g_fWriteAccess = FALSE;
DWORD dwError = RegOpenKeyEx(HKEY_LOCAL_MACHINE, SZ_REGKEY_W32TIME_SERVICE_PARAMETERS, 0, KEY_WRITE, &hKeyTemp);
if (ERROR_SUCCESS == dwError)
{
// We have access to read & write so we can enable the UI.
RegCloseKey(hKeyTemp);
dwError = RegCreateKeyEx(HKEY_LOCAL_MACHINE, SZ_REGKEY_DATETIME, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKeyTemp, NULL);
if (ERROR_SUCCESS == dwError)
{
RegCloseKey(hKeyTemp);
dwError = RegCreateKeyEx(HKEY_LOCAL_MACHINE, SZ_REGKEY_DATETIME_SERVERS, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL, &hKeyTemp, NULL);
if (ERROR_SUCCESS == dwError)
{
g_fWriteAccess = TRUE;
RegCloseKey(hKeyTemp);
}
}
}
dwError = SHGetValue(HKEY_LOCAL_MACHINE, SZ_REGKEY_DATETIME_SERVERS, NULL, &dwType, (void *) szIndex, &cbSize);
hr = ResultFromWin32(dwError);
if (SUCCEEDED(hr))
{
int nIndex = StrToInt(szIndex);
if (!g_fCustomServer)
{
nIndex -= 1; // We don't have slot zero (the custom server), so reduce the index.
}
ComboBox_SetCurSel(hwndServerEdit, nIndex);
}
_OnSetFeature(hDlg, fIsFeatureOn);
if (fIsFeatureOn)
{
// The feature is on, so select the text and set focus
// to the combobox.
ComboBox_SetEditSel(hwndServerEdit, 0, (LPARAM)-1); // Select all the Text
SetFocus(hwndServerEdit);
}
else
{
// The feature is off so set focus to the checkbox.
SetFocus(hwndOnOffCheckbox);
}
ENTERCRITICAL;
if (m_pszStatusString)
{
SetWindowText(GetDlgItem(m_hwndInternet, DATETIME_INTERNET_ERRORTEXT), m_pszStatusString);
}
if (m_pszNextSyncTime)
{
SetWindowText(GetDlgItem(m_hwndInternet, DATETIME_INFOTEXTTOP), m_pszNextSyncTime);
}
LEAVECRITICAL;
return S_OK;
}
// This function is called on the background thread.
HRESULT SetSyncFlags(DWORD dwSyncFromFlags)
{
LPCTSTR pszFlags = SZ_SYNC_BOTH;
switch (dwSyncFromFlags)
{
case NCSF_DomainHierarchy:
pszFlags = SZ_SYNC_DS;
break;
case NCSF_ManualPeerList:
pszFlags = SZ_SYNC_NTP;
break;
case 0x00000000:
pszFlags = SZ_SYNC_NONE;
break;
};
DWORD cbSize = ((lstrlen(pszFlags) + 1) * sizeof(pszFlags[0]));
DWORD dwError = SHSetValue(HKEY_LOCAL_MACHINE, SZ_REGKEY_W32TIME_SERVICE_PARAMETERS, SZ_REGVALUE_W32TIME_SYNCFROMFLAGS, REG_SZ, (LPBYTE)pszFlags, cbSize);
HRESULT hr = ResultFromWin32(dwError);
return hr;
}
/*****************************************************************************\
DESCRIPTION:
The following reg keys determine if the W32Time service is on or off:
HKLM,"System\CurrentControlSet\Services\W32Time\"
"Start", 0x00000002 (Manual?) 0x0000003 (Automatic?)
"Type", 0x00000020 (Nt5Ds?) 0x0000120 (NTP?)
HKLM,"System\CurrentControlSet\Services\W32Time\Parameters"
"LocalNTP", 0x00000000 (Off) 0x0000001 (On)
"Type", "Nt5Ds" (NTP off) "NTP" (NTP?)
HKLM,"System\CurrentControlSet\Services\W32Time\TimeProviders\NTPClient"
"SyncFromFlags", 0x00000001 (???) 0x0000002 (???)
The following reg keys determine which NTP server to use:
HKLM,"System\CurrentControlSet\Services\W32Time\TimeProviders\NTPClient"
"ManualPeerList", REG_SZ_EXPAND "time.nist.gov"
\*****************************************************************************/
// This function is called on the forground thread.
HRESULT CInternetTime::_PersistInternetTimeSettings(HWND hDlg)
{
BOOL fIsFeatureOn = ((BST_CHECKED == IsDlgButtonChecked(hDlg, DATETIME_AUTOSETFROMINTERNET)) ? TRUE : FALSE);
DWORD dwSyncFromFlags = (fIsFeatureOn ? NCSF_ManualPeerList : 0 /*none*/ );
DWORD dwError;
DWORD cbSize;
HRESULT hr = SetSyncFlags(dwSyncFromFlags);
HWND hwndServerEdit = GetDlgItem(hDlg, DATETIME_INTERNET_SERVER_EDIT);
// No, so the editbox has a customer server. We need to store the custom server.
TCHAR szServer[INTERNET_MAX_HOST_NAME_LENGTH];
TCHAR szServerReg[INTERNET_MAX_HOST_NAME_LENGTH];
szServer[0] = 0;
GetWindowText(hwndServerEdit, szServer, ARRAYSIZE(szServer));
// Here, we want to detect the case where someone typed in the same name as
// in the drop down list. So if "time.nist.gov" is in the list, we want to
// select it instead of saving another "time.nist.gov" in the custom slot.
int nDup = ComboBox_FindString(hwndServerEdit, 0, szServer);
if (CB_ERR != nDup)
{
ComboBox_SetCurSel(hwndServerEdit, nDup);
}
// The ",0x1" denotes that we want to sync less frequently and not use the NTP RFC's
// sync frequency.
StrCpyN(szServerReg, szServer, ARRAYSIZE(szServerReg));
StrCatBuff(szServerReg, SZ_DIFFERENT_SYNCFREQUENCY, ARRAYSIZE(szServerReg));
// Write the default server name into "ManualPeerList", which is where the
// service reads it from.
SetW32TimeServer(szServerReg);
if (!StrCmpI(szServerReg, L"time.windows.com"))
{
// We need time.windows.com to scale to a large number of users, so don't let it sync more frequently
// than once a week.
SetW32TimeSyncFreq(SYNC_ONCE_PER_WEEK);
}
int nIndex = ComboBox_GetCurSel(hwndServerEdit);
if (CB_ERR == nIndex) // Is anything selected?
{
cbSize = ((lstrlenW(szServer) + 1) * sizeof(szServer[0]));
dwError = SHSetValueW(HKEY_LOCAL_MACHINE, SZ_REGKEY_DATETIME_SERVERS, SZ_INDEXTO_CUSTOMHOST, REG_SZ, (void *)szServer, cbSize);
nIndex = 0;
}
else
{
if (!g_fCustomServer)
{
nIndex += 1; // Push the index down by one because the listbox doesn't have a custom server
}
}
TCHAR szIndex[MAX_PATH];
wnsprintf(szIndex, ARRAYSIZE(szIndex), TEXT("%d"), nIndex);
cbSize = ((lstrlenW(szIndex) + 1) * sizeof(szIndex[0]));
dwError = SHSetValueW(HKEY_LOCAL_MACHINE, SZ_REGKEY_DATETIME_SERVERS, NULL, REG_SZ, (void *)szIndex, cbSize);
_StartServiceAndRefresh(fIsFeatureOn); // Make sure the service is on and make it update it's settings.
return S_OK;
}
// This function is called on either the forground or background thread.
HRESULT CInternetTime::_StartServiceAndRefresh(BOOL fStartIfOff)
{
HRESULT hr = S_OK;
// We need to let the service know that settings may have changed. If the user
// wanted this feature on, then we should make sure the service starts.
SC_HANDLE hServiceMgr = OpenSCManager(NULL, NULL, (SC_MANAGER_CONNECT | SC_MANAGER_ENUMERATE_SERVICE | SC_MANAGER_QUERY_LOCK_STATUS));
if (hServiceMgr)
{
SC_HANDLE hService = OpenService(hServiceMgr, SZ_SERVICE_W32TIME, (/*SERVICE_START |*/ SERVICE_PAUSE_CONTINUE));
DWORD dwServiceStartMode = 0x00000002; // This will cause the service to start Automatically on reboot.
DWORD dwError = SHSetValueW(HKEY_LOCAL_MACHINE, SZ_REGKEY_W32TIME_SERVICE, SZ_REGVALUE_W32TIME_STARTSERVICE, REG_DWORD, &dwServiceStartMode, sizeof(dwServiceStartMode));
if (hService)
{
SERVICE_STATUS serviceStatus = {0};
BOOL fSucceeded;
if (fStartIfOff)
{
// We should start up the service in case it's not turned on.
fSucceeded = StartService(hService, 0, NULL);
hr = (fSucceeded ? S_OK : ResultFromLastError());
if (ResultFromWin32(ERROR_SERVICE_ALREADY_RUNNING) == hr)
{
hr = S_OK; // We can ignore this err value because it's benign.
}
}
// Tell the service to re-read the registry entry settings.
fSucceeded = ControlService(hService, SERVICE_CONTROL_PARAMCHANGE, &serviceStatus);
CloseServiceHandle(hService);
}
else
{
hr = ResultFromLastError();
}
CloseServiceHandle(hServiceMgr);
}
else
{
hr = ResultFromLastError();
}
return hr;
}
HRESULT CInternetTime::_OnUpdateStatusString(void)
{
HRESULT hr = S_OK;
ENTERCRITICAL; // Be safe while using m_pszStatusString
SetWindowText(GetDlgItem(m_hwndInternet, DATETIME_INTERNET_ERRORTEXT), (m_pszStatusString ? m_pszStatusString : TEXT("")));
SetWindowText(GetDlgItem(m_hwndInternet, DATETIME_INFOTEXTTOP), (m_pszNextSyncTime ? m_pszNextSyncTime : TEXT("")));
if (m_hCurOld)
{
SetCursor(m_hCurOld);
m_hCurOld = NULL;
}
LEAVECRITICAL;
return S_OK;
}
HRESULT HrShellExecute(HWND hwnd, LPCTSTR lpVerb, LPCTSTR lpFile, LPCTSTR lpParameters, LPCTSTR lpDirectory, INT nShowCmd)
{
HRESULT hr = S_OK;
HINSTANCE hReturn = ShellExecute(hwnd, lpVerb, lpFile, lpParameters, lpDirectory, nShowCmd);
if ((HINSTANCE)32 > hReturn)
{
hr = ResultFromLastError();
}
return hr;
}
// This function is called on the forground thread.
HRESULT CInternetTime::_GoGetHelp(void)
{
HRESULT hr = S_OK;
TCHAR szCommand[MAX_PATH];
LoadString(HINST_THISDLL, IDS_TROUBLESHOOT_INTERNETIME, szCommand, ARRAYSIZE(szCommand));
HrShellExecute(m_hwndDate, NULL, szCommand, NULL, NULL, SW_NORMAL);
return S_OK;
}
// This function is called on the forground thread.
INT_PTR CInternetTime::_OnCommandAdvancedPage(HWND hDlg, WPARAM wParam, LPARAM lParam)
{
BOOL fHandled = 1; // Not handled (WM_COMMAND seems to be different)
WORD wMsg = GET_WM_COMMAND_CMD(wParam, lParam);
WORD idCtrl = GET_WM_COMMAND_ID(wParam, lParam);
switch (idCtrl)
{
case DATETIME_AUTOSETFROMINTERNET:
switch (wMsg)
{
case BN_CLICKED:
_OnToggleFeature(hDlg);
break;
}
break;
case DATETIME_INTERNET_SERVER_EDIT:
switch (wMsg)
{
case EN_CHANGE:
case CBN_EDITCHANGE:
case CBN_SELCHANGE:
PropSheet_Changed(GetParent(hDlg), hDlg);
break;
}
break;
case DATETIME_INTERNET_UPDATENOW:
switch (wMsg)
{
case BN_CLICKED:
_OnUpdateButton();
break;
}
break;
}
return fHandled;
}
// This function is called on the forground thread.
INT_PTR CInternetTime::_OnNotifyAdvancedPage(HWND hDlg, NMHDR * pNMHdr, int idControl)
{
BOOL fHandled = 1; // Not handled (WM_COMMAND seems to be different)
if (pNMHdr)
{
switch (pNMHdr->idFrom)
{
case 0:
{
switch (pNMHdr->code)
{
case PSN_APPLY:
_PersistInternetTimeSettings(hDlg);
break;
}
break;
}
default:
switch (pNMHdr->code)
{
case NM_RETURN:
case NM_CLICK:
{
PNMLINK pNMLink = (PNMLINK) pNMHdr;
if (!StrCmpW(pNMLink->item.szID, L"HelpMe"))
{
_GoGetHelp();
}
break;
}
}
break;
}
}
return fHandled;
}
// This function is called on the forground thread.
EXTERN_C INT_PTR CALLBACK AdvancedDlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if (g_pInternetTime)
{
return g_pInternetTime->_AdvancedDlgProc(hDlg, uMsg, wParam, lParam);
}
return (TRUE);
}
// This function is called on the forground thread.
INT_PTR CInternetTime::_AdvancedDlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
case WM_INITDIALOG:
_InitAdvancedPage(hDlg);
break;
case WM_DESTROY:
break;
case WM_NOTIFY:
_OnNotifyAdvancedPage(hDlg, (NMHDR *)lParam, (int) wParam);
break;
case WM_COMMAND:
_OnCommandAdvancedPage(hDlg, wParam, lParam);
break;
case WMUSER_UPDATED_STATUS_TEXT:
_OnUpdateStatusString();
break;
case WM_HELP:
WinHelp((HWND) ((LPHELPINFO) lParam)->hItemHandle, SZ_HELPFILE_INTERNETTIME, HELP_WM_HELP, (DWORD_PTR) aInternetTimeHelpIds);
break;
case WM_CONTEXTMENU: // right mouse click
WinHelp((HWND) wParam, SZ_HELPFILE_INTERNETTIME, HELP_CONTEXTMENU, (DWORD_PTR) aInternetTimeHelpIds);
break;
default:
return FALSE;
}
return (TRUE);
}
// This function is called on the forground thread.
HRESULT CInternetTime::AddInternetPage(void)
{
HRESULT hr = S_OK;
PROPSHEETPAGE pspAdvanced;
INITCOMMONCONTROLSEX initComctl32;
initComctl32.dwSize = sizeof(initComctl32);
initComctl32.dwICC = (ICC_STANDARD_CLASSES | ICC_LINK_CLASS);
InitCommonControlsEx(&initComctl32); // Register the comctl32 LinkWindow
pspAdvanced.dwSize = sizeof(PROPSHEETPAGE);
pspAdvanced.dwFlags = PSP_DEFAULT;
pspAdvanced.hInstance = HINST_THISDLL;
pspAdvanced.pszTemplate = MAKEINTRESOURCE(DLG_ADVANCED);
pspAdvanced.pfnDlgProc = AdvancedDlgProc;
pspAdvanced.lParam = (LPARAM) this;
if (IsWindow(m_hDlg))
{
HPROPSHEETPAGE hPropSheet = CreatePropertySheetPage(&pspAdvanced);
if (hPropSheet)
{
PropSheet_AddPage(m_hDlg, hPropSheet);
}
}
return hr;
}
/////////////////////////////////////////////////////////////////////
// Background Thread Functions
/////////////////////////////////////////////////////////////////////
///////////
// These functions will cause the background thread to sync
///////////
#define SECONDS_FROM_100NS 10000000
// ulResolveAttempts -- the number of times the NTP provider has attempted to
// resolve this peer unsuccessfully. Setting this
// value to 0 indicates that the peer has been successfully
// resolved.
// u64TimeRemaining -- the number of 100ns intervals until the provider will
// poll this peer again
// u64LastSuccessfulSync -- the number of 100ns intervals since (0h 1-Jan 1601)
// ulLastSyncError -- S_OK if the last sync with this peer was successful, otherwise,
// the error that occurred attempting to sync
// ulLastSyncErrorMsgId -- the resource identifier of a string representing the last
// error that occurred syncing from this peer. 0 if there is no
// string associated with this error.
// This function is called on the background thread.
HRESULT W32TimeGetErrorInfoWrap(UINT * pulResolveAttempts, ULONG * pulValidDataCounter, UINT64 * pu64TimeRemaining, UINT64 * pu64LastSuccessfulSync, HRESULT * phrLastSyncError,
UINT * pulLastSyncErrorMsgId, LPTSTR pszServer, DWORD cchSize, LPTSTR pszServerToQuery)
{
HRESULT hr = S_OK;
*pulResolveAttempts = 0;
*pulValidDataCounter = 0;
*pu64TimeRemaining = 0;
*pu64LastSuccessfulSync = 0;
*phrLastSyncError = E_FAIL;
*pulLastSyncErrorMsgId = 0;
pszServer[0] = 0;
// NOTE: Server should return ERROR_TIME_SKEW if time is too far out of date to sync.
W32TIME_NTP_PROVIDER_DATA * pProviderInfo = NULL;
DWORD dwError = W32TimeQueryNTPProviderStatusDDload(SZ_COMPUTER_LOCAL, 0, SZ_NTPCLIENT, &pProviderInfo);
if ((ERROR_SUCCESS == dwError) && pProviderInfo)
{
*phrLastSyncError = pProviderInfo->ulError;
*pulLastSyncErrorMsgId = pProviderInfo->ulErrorMsgId;
DWORD dwMostRecentlySyncdPeerIndex = 0xFFFFFFFF;
UINT64 u64LastSuccessfulSync = 0;
for (DWORD dwIndex = 0; dwIndex < pProviderInfo->cPeerInfo; dwIndex++)
{
// Only want to query those peers which we explictly sync'd from.
// If we haven't explicitly requested a sync, we'll just take the most recently sync'd peer.
if (NULL == pszServerToQuery || ComparePeers(pszServerToQuery, pProviderInfo->pPeerInfo[dwIndex].wszUniqueName))
{
if (u64LastSuccessfulSync <= pProviderInfo->pPeerInfo[dwIndex].u64LastSuccessfulSync)
{
dwMostRecentlySyncdPeerIndex = dwIndex;
u64LastSuccessfulSync = pProviderInfo->pPeerInfo[dwIndex].u64LastSuccessfulSync;
}
}
}
if (dwMostRecentlySyncdPeerIndex < pProviderInfo->cPeerInfo && pProviderInfo->pPeerInfo)
{
*pulResolveAttempts = pProviderInfo->pPeerInfo[dwMostRecentlySyncdPeerIndex].ulResolveAttempts;
*pulValidDataCounter = pProviderInfo->pPeerInfo[dwMostRecentlySyncdPeerIndex].ulValidDataCounter;
*pu64TimeRemaining = pProviderInfo->pPeerInfo[dwMostRecentlySyncdPeerIndex].u64TimeRemaining;
*pu64LastSuccessfulSync = pProviderInfo->pPeerInfo[dwMostRecentlySyncdPeerIndex].u64LastSuccessfulSync;
*phrLastSyncError = pProviderInfo->pPeerInfo[dwMostRecentlySyncdPeerIndex].ulLastSyncError;
*pulLastSyncErrorMsgId = pProviderInfo->pPeerInfo[dwMostRecentlySyncdPeerIndex].ulLastSyncErrorMsgId;
if (pProviderInfo->pPeerInfo[dwMostRecentlySyncdPeerIndex].wszUniqueName)
{
StrCpyN(pszServer, pProviderInfo->pPeerInfo[dwMostRecentlySyncdPeerIndex].wszUniqueName, cchSize);
// Strip off non-user friendly information which may have been tacked on to the peer name:
LPTSTR pszJunk = StrStrW(pszServer, L" (");
if (pszJunk)
{
pszJunk[0] = 0;
}
pszJunk = StrStrW(pszServer, L",");
if (pszJunk)
{
pszJunk[0] = 0;
}
}
}
else
{
*phrLastSyncError = HRESULT_FROM_WIN32(ERROR_TIMEOUT);
if (NULL != pszServerToQuery)
{
StrCpyN(pszServer, pszServerToQuery, cchSize);
}
}
W32TimeBufferFreeDDload(pProviderInfo);
}
else
{
hr = ResultFromWin32(dwError);
}
return hr;
}
// pftTimeRemaining will be returned with the time/date of the next sync, not time from now.
HRESULT W32TimeGetErrorInfoWrapHelper(UINT * pulResolveAttempts, ULONG * pulValidDataCounter, FILETIME * pftTimeRemaining, FILETIME * pftLastSuccessfulSync, HRESULT * phrLastSyncError,
UINT * pulLastSyncErrorMsgId, LPTSTR pszServer, DWORD cchSize, LPTSTR pszServerToQuery)
{
UINT64 * pu64LastSuccessfulSync = (UINT64 *) pftLastSuccessfulSync;
UINT64 u64TimeRemaining;
HRESULT hr = W32TimeGetErrorInfoWrap(pulResolveAttempts, pulValidDataCounter, &u64TimeRemaining, pu64LastSuccessfulSync, phrLastSyncError, pulLastSyncErrorMsgId, pszServer, cchSize, pszServerToQuery);
if (SUCCEEDED(hr))
{
SYSTEMTIME stCurrent;
FILETIME ftCurrent;
GetSystemTime(&stCurrent);
SystemTimeToFileTime(&stCurrent, &ftCurrent);
ULONGLONG * pNextSync = (ULONGLONG *) pftTimeRemaining;
ULONGLONG * pCurrent = (ULONGLONG *) &ftCurrent;
*pNextSync = (*pCurrent + u64TimeRemaining);
}
return hr;
}
// This function is called on the background thread.
HRESULT CInternetTime::_GetDateTimeString(FILETIME * pftTimeDate, BOOL fDate, LPTSTR pszString, DWORD cchSize)
{
HRESULT hr = S_OK;
TCHAR szFormat[MAX_PATH];
pszString[0] = 0;
if (GetLocaleInfo(LOCALE_USER_DEFAULT, (fDate ? LOCALE_SSHORTDATE : LOCALE_STIMEFORMAT), szFormat, ARRAYSIZE(szFormat)))
{
SYSTEMTIME stTimeDate;
if (FileTimeToSystemTime(pftTimeDate, &stTimeDate))
{
if (fDate)
{
if (!GetDateFormat(LOCALE_USER_DEFAULT, 0, &stTimeDate, szFormat, pszString, cchSize))
{
hr = ResultFromLastError();
}
}
else
{
if (!GetTimeFormat(LOCALE_USER_DEFAULT, TIME_NOSECONDS, &stTimeDate, szFormat, pszString, cchSize))
{
hr = ResultFromLastError();
}
}
}
else
{
hr = ResultFromLastError();
}
}
else
{
hr = ResultFromLastError();
}
return hr;
}
HRESULT _CleanUpErrorString(LPWSTR pszTemp4, DWORD cchSize)
{
PathRemoveBlanks(pszTemp4);
while (TRUE)
{
DWORD cchSizeTemp = lstrlen(pszTemp4);
if (cchSizeTemp && ((TEXT('\n') == pszTemp4[cchSizeTemp-1]) ||
(13 == pszTemp4[cchSizeTemp-1])))
{
pszTemp4[cchSizeTemp-1] = 0;
}
else
{
break;
}
}
return S_OK;
}
// This function is called on the background thread.
HRESULT CInternetTime::_CreateW32TimeSuccessErrorString(DWORD dwError, LPTSTR pszString, DWORD cchSize, LPTSTR pszNextSync, DWORD cchNextSyncSize, LPTSTR pszServerToQuery)
{
HRESULT hr = S_OK;
UINT ulResolveAttempts = 0;
FILETIME ftTimeRemainingUTC = {0};
FILETIME ftLastSuccessfulSyncUTC = {0};
FILETIME ftTimeRemaining = {0};
FILETIME ftLastSuccessfulSync = {0};
UINT ulLastSyncErrorMsgId = 0;
TCHAR szServer[MAX_PATH];
HRESULT hrLastSyncError = 0;
ULONG ulValidDataCounter = 0;
TCHAR szTemplate[MAX_PATH];
TCHAR szTemp1[MAX_PATH];
TCHAR szTemp2[MAX_PATH];
TCHAR szTemp3[MAX_URL_STRING];
TCHAR szTemp4[MAX_URL_STRING];
pszString[0] = 0;
pszNextSync[0] = 0;
hr = W32TimeGetErrorInfoWrapHelper(&ulResolveAttempts, &ulValidDataCounter, &ftTimeRemainingUTC, &ftLastSuccessfulSyncUTC, &hrLastSyncError, &ulLastSyncErrorMsgId, szServer, ARRAYSIZE(szServer), pszServerToQuery);
if (SUCCEEDED(hr))
{
// ftTimeRemaining and ftLastSuccessfulSync are stored in UTC, so translate to our time zone.
FileTimeToLocalFileTime(&ftTimeRemainingUTC, &ftTimeRemaining);
FileTimeToLocalFileTime(&ftLastSuccessfulSyncUTC, &ftLastSuccessfulSync);
// Create the string showing the next time we plan on syncing.
LoadString(HINST_THISDLL, IDS_IT_NEXTSYNC, szTemplate, ARRAYSIZE(szTemplate));
if (SUCCEEDED(_GetDateTimeString(&ftTimeRemaining, TRUE, szTemp1, ARRAYSIZE(szTemp1))) && // Get the date
SUCCEEDED(_GetDateTimeString(&ftTimeRemaining, FALSE, szTemp2, ARRAYSIZE(szTemp2))) && // Get the time
FAILED(FormatMessageWedge(szTemplate, pszNextSync, cchNextSyncSize, szTemp1, szTemp2)))
{
pszNextSync[0] = 0;
}
if (ResyncResult_ChangeTooBig == dwError)
{
hrLastSyncError = E_FAIL;
}
if ((ResyncResult_NoData == dwError || ResyncResult_StaleData == dwError) && SUCCEEDED(hrLastSyncError))
{
// We've synchronized from our peer, but it didn't provide good enough samples to update our clock.
hrLastSyncError = HRESULT_FROM_WIN32(ERROR_TIMEOUT); // approximately the right error
}
// We should never hit the following case. But if the operation failed (NOT ResyncResult_Success)
// then we need hrLastSyncError to be a failure value.
if ((ResyncResult_Success != dwError) && SUCCEEDED(hrLastSyncError))
{
hrLastSyncError = E_FAIL;
}
switch (hrLastSyncError)
{
case S_OK:
if (!ftLastSuccessfulSyncUTC.dwLowDateTime && !ftLastSuccessfulSyncUTC.dwHighDateTime)
{
// We have never sync from the server.
LoadString(HINST_THISDLL, IDS_NEVER_TRIED_TOSYNC, pszString, cchSize);
}
else
{
if (szServer[0])
{
// Format: "Successfully synchronized the clock on 12/23/2001 at 11:03:32am from time.windows.com."
LoadString(HINST_THISDLL, IDS_IT_SUCCESS, szTemplate, ARRAYSIZE(szTemplate));
if (SUCCEEDED(_GetDateTimeString(&ftLastSuccessfulSync, TRUE, szTemp1, ARRAYSIZE(szTemp1))) && // Get the date
SUCCEEDED(_GetDateTimeString(&ftLastSuccessfulSync, FALSE, szTemp2, ARRAYSIZE(szTemp2))) && // Get the time
FAILED(FormatMessageWedge(szTemplate, pszString, cchSize, szTemp1, szTemp2, szServer)))
{
pszString[0] = 0;
}
}
else
{
// Format: "Successfully synchronized the clock on 12/23/2001 at 11:03:32am."
LoadString(HINST_THISDLL, IDS_IT_SUCCESS2, szTemplate, ARRAYSIZE(szTemplate));
if (SUCCEEDED(_GetDateTimeString(&ftLastSuccessfulSync, TRUE, szTemp1, ARRAYSIZE(szTemp1))) && // Get the date
SUCCEEDED(_GetDateTimeString(&ftLastSuccessfulSync, FALSE, szTemp2, ARRAYSIZE(szTemp2))) && // Get the time
FAILED(FormatMessageWedge(szTemplate, pszString, cchSize, szTemp1, szTemp2)))
{
pszString[0] = 0;
}
}
}
break;
case S_FALSE:
pszString[0] = 0;
break;
default:
if (ulValidDataCounter &&
((0 != ftLastSuccessfulSyncUTC.dwLowDateTime) || (0 != ftLastSuccessfulSyncUTC.dwHighDateTime)))
{
// Getting this far means we may have failed this last sync attempt, but we have succeeded
// previously
hr = E_FAIL;
szTemp4[0] = 0; // This will be the error message.
szTemp3[0] = 0;
if (ResyncResult_ChangeTooBig == dwError)
{
// If the date is too far off, we fail the sync for security reasons. That happened
// here.
LoadString(HINST_THISDLL, IDS_ERR_DATETOOWRONG, szTemp4, ARRAYSIZE(szTemp4));
}
else if (ulLastSyncErrorMsgId) // We have a bonus error string.
{
_LoadW32Time();
if (g_hInstW32Time)
{
// Load the specific reason the sync failed.
if (!FormatMessage(FORMAT_MESSAGE_FROM_HMODULE, (LPCVOID)g_hInstW32Time, ulLastSyncErrorMsgId, 0, szTemp4, ARRAYSIZE(szTemp4), NULL))
{
szTemp4[0] = 0; // We will get the value below
hr = S_OK;
}
else
{
_CleanUpErrorString(szTemp4, ARRAYSIZE(szTemp4));
}
}
}
if (!szTemp4[0])
{
if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, HRESULT_CODE(hrLastSyncError), 0, szTemp4, ARRAYSIZE(szTemp4), NULL))
{
_CleanUpErrorString(szTemp4, ARRAYSIZE(szTemp4));
}
else
{
szTemp4[0] = 0;
}
}
if (szTemp4[0])
{
LoadString(HINST_THISDLL, IDS_IT_FAIL1, szTemplate, ARRAYSIZE(szTemplate));
if (FAILED(FormatMessageWedge(szTemplate, szTemp3, ARRAYSIZE(szTemp3), szServer, szTemp4)))
{
szTemp3[0] = 0;
}
}
else
{
// <------------------------------------------------------------->
// Format:
// "An error occurred synchronizing the clock from time.windows.com
// on 2/3/2001 at 11:03:32am. Unable to connect to the server."
LoadString(HINST_THISDLL, IDS_IT_FAIL2, szTemplate, ARRAYSIZE(szTemplate));
if (FAILED(FormatMessageWedge(szTemplate, szTemp3, ARRAYSIZE(szTemp3), szServer)))
{
szTemp3[0] = 0;
}
hr = S_OK;
}
LoadString(HINST_THISDLL, IDS_IT_FAILLAST, szTemplate, ARRAYSIZE(szTemplate));
if (SUCCEEDED(_GetDateTimeString(&ftLastSuccessfulSync, TRUE, szTemp1, ARRAYSIZE(szTemp1))) && // Get the date
SUCCEEDED(_GetDateTimeString(&ftLastSuccessfulSync, FALSE, szTemp2, ARRAYSIZE(szTemp2))) && // Get the time
FAILED(FormatMessageWedge(szTemplate, szTemp4, ARRAYSIZE(szTemp4), szTemp1, szTemp2)))
{
szTemp4[0] = 0;
}
wnsprintf(pszString, cchSize, TEXT("%s\n\n%s"), szTemp3, szTemp4);
}
else
{
// Getting this far means we may have failed to sync this time and we have never succeeded before.
if (ulLastSyncErrorMsgId) // We have a bonus error string.
{
_LoadW32Time();
szTemp3[0] = 0;
if (g_hInstW32Time)
{
// <------------------------------------------------------------->
// Format:
// "An error occurred synchronizing the clock from time.windows.com
// on 2/3/2001 at 11:03:32am. Unable to connect to the server."
if (!FormatMessage(FORMAT_MESSAGE_FROM_HMODULE, (LPCVOID)g_hInstW32Time, ulLastSyncErrorMsgId, 0, szTemp4, ARRAYSIZE(szTemp4), NULL))
{
szTemp4[0] = 0;
}
else
{
_CleanUpErrorString(szTemp4, ARRAYSIZE(szTemp4));
}
if (szServer[0])
{
LoadString(HINST_THISDLL, IDS_IT_FAIL1, szTemplate, ARRAYSIZE(szTemplate));
if (FAILED(FormatMessageWedge(szTemplate, pszString, cchSize, szServer, szTemp4)))
{
pszString[0] = 0;
}
}
else
{
LoadString(HINST_THISDLL, IDS_IT_FAIL3, szTemplate, ARRAYSIZE(szTemplate));
if (FAILED(FormatMessageWedge(szTemplate, pszString, cchSize, szTemp4)))
{
pszString[0] = 0;
}
}
}
}
else
{
// <------------------------------------------------------------->
// Format:
// "An error occurred synchronizing the clock from time.windows.com
// on 2/3/2001 at 11:03:32am. Unable to connect to the server."
LoadString(HINST_THISDLL, IDS_IT_FAIL2, szTemplate, ARRAYSIZE(szTemplate));
if (FAILED(FormatMessageWedge(szTemplate, pszString, cchSize, szServer)))
{
pszString[0] = 0;
}
}
}
break;
};
}
else
{
LoadString(HINST_THISDLL, IDS_ERR_GETINFO_FAIL, szTemplate, ARRAYSIZE(szTemplate));
if (!FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, HRESULT_CODE(hr), 0, szTemp1, ARRAYSIZE(szTemp1), NULL))
{
szTemp1[0] = 0;
}
else
{
_CleanUpErrorString(szTemp1, ARRAYSIZE(szTemp1));
}
wnsprintf(pszString, cchSize, szTemplate, szTemp1);
}
return hr;
}
///////////
// These functions will cause the background thread to check if we should add the "Internet Time" tab.
///////////
// This function is called on the background thread.
DWORD CALLBACK _AsyncCheckDCThread(void * pv)
{
if (g_pInternetTime)
{
g_pInternetTime->AsyncCheck();
}
return 0;
}
typedef DWORD (* PFN_NETGETJOININFORMATION) (IN LPCWSTR pszComputerName OPTIONAL, OUT LPWSTR * pszDomainName, IN PNETSETUP_JOIN_STATUS pJoinStatus);
// This function is called on the background thread.
DWORD NetGetJoinInformation_DelayLoad(
IN LPCWSTR pszComputerName OPTIONAL,
OUT LPWSTR * pszDomainName,
IN PNETSETUP_JOIN_STATUS pJoinStatus)
{
DWORD dwError = ERROR_INVALID_FUNCTION;
HMODULE hmod = LoadLibrary(TEXT("NETAPI32.DLL"));
if (hmod)
{
PFN_NETGETJOININFORMATION pfnDelayLoad = (PFN_NETGETJOININFORMATION)GetProcAddress(hmod, "NetGetJoinInformation");
if (pfnDelayLoad)
{
dwError = pfnDelayLoad(pszComputerName, pszDomainName, pJoinStatus);
}
FreeLibrary(hmod);
}
else
{
dwError = GetLastError();
}
return dwError;
}
typedef DWORD (* PFN_DSGETDCNAME) (IN LPCTSTR ComputerName OPTIONAL, IN LPCTSTR DomainName OPTIONAL, IN GUID *DomainGuid OPTIONAL, IN LPCTSTR SiteName OPTIONAL,
IN ULONG Flags, OUT PDOMAIN_CONTROLLER_INFO * DomainControllerInfo);
// This function is called on the background thread.
DWORD DsGetDcName_DelayLoad(
IN LPCWSTR pszComputerName OPTIONAL,
IN LPCWSTR pszDomainName OPTIONAL,
IN GUID * pDomainGuid OPTIONAL,
IN LPCWSTR pszSiteName OPTIONAL,
IN ULONG pulFlags,
OUT PDOMAIN_CONTROLLER_INFOW * pDomainControllerInfo)
{
DWORD dwError = ERROR_INVALID_FUNCTION;
HMODULE hmod = LoadLibrary(TEXT("NETAPI32.DLL"));
if (hmod)
{
PFN_DSGETDCNAME pfnDelayLoad = (PFN_DSGETDCNAME)GetProcAddress(hmod, "DsGetDcNameW");
if (pfnDelayLoad)
{
dwError = pfnDelayLoad(pszComputerName, pszDomainName, pDomainGuid, pszSiteName, pulFlags, pDomainControllerInfo);
}
FreeLibrary(hmod);
}
else
{
dwError = GetLastError();
}
return dwError;
}
typedef DWORD (* PFN_NETAPIBUFFERFREE) (IN LPVOID Buffer);
// This function is called on the background thread.
DWORD NetApiBufferFree_DelayLoad(IN LPVOID Buffer)
{
DWORD dwError = FALSE;
HMODULE hmod = LoadLibrary(TEXT("NETAPI32.DLL"));
if (hmod)
{
PFN_NETAPIBUFFERFREE pfnDelayLoad = (PFN_NETAPIBUFFERFREE)GetProcAddress(hmod, "NetApiBufferFree");
if (pfnDelayLoad)
{
dwError = pfnDelayLoad(Buffer);
}
FreeLibrary(hmod);
}
else
{
dwError = GetLastError();
}
return dwError;
}
// This function is called on the background thread.
BOOL CInternetTime::IsInternetTimeAvailable(void)
{
return SHRegGetBoolUSValue(SZ_REGKEY_DATETIME, SZ_REGVALUE_INTERNET_FEATURE_AVAILABLE, FALSE, FEATURE_INTERNET_TIME);
}
// This function is called on the background thread.
EXTERN_C BOOL DoesTimeComeFromDC(void)
{
BOOL fTimeFromDomain = FALSE;
LPWSTR pszDomain = NULL;
NETSETUP_JOIN_STATUS joinStatus = NetSetupUnknownStatus;
DWORD dwError = NetGetJoinInformation_DelayLoad(NULL, &pszDomain, &joinStatus);
// We will act like there isn't a DC if we have the test registry set.
if (NERR_Success == dwError)
{
// If we are connected to a domain, we need to do the expensive net search
// to see that is where we will get the time from.
if (NetSetupDomainName == joinStatus)
{
PDOMAIN_CONTROLLER_INFO pdomainInfo = {0};
dwError = DsGetDcName_DelayLoad(NULL, NULL, NULL, NULL, DS_TIMESERV_REQUIRED, &pdomainInfo);
// We will act like there isn't a DC if we have the test registry set.
if (ERROR_SUCCESS == dwError)
{
if (FALSE == SHRegGetBoolUSValue(SZ_REGKEY_DATETIME, SZ_REGVALUE_TEST_SIMULATENODC, FALSE, FALSE))
{
fTimeFromDomain = TRUE;
}
NetApiBufferFree_DelayLoad(pdomainInfo);
}
}
if (pszDomain)
{
NetApiBufferFree_DelayLoad(pszDomain);
}
}
return fTimeFromDomain;
}
// This function is called on the background thread.
HRESULT CInternetTime::_SyncNow(BOOL fOnlyUpdateInfo)
{
HRESULT hr = S_OK;
ENTERCRITICAL;
BOOL fContinue = ((eBKAUpdate == m_eAction) || (eBKAGetInfo == m_eAction));
if (fContinue)
{
m_eAction = eBKAUpdating;
}
LEAVECRITICAL;
if (fContinue)
{
hr = E_OUTOFMEMORY;
DWORD cchSize = 4024;
LPTSTR pszString = (LPTSTR) LocalAlloc(LPTR, sizeof(pszString[0]) * cchSize);
if (pszString)
{
WCHAR szExistingServer[MAX_URL_STRING];
HRESULT hrServer = E_FAIL;
TCHAR szNewServer[MAX_PATH];
TCHAR szNextSync[MAX_PATH];
DWORD dwError = 0;
DWORD dwSyncFlags;
if (!fOnlyUpdateInfo)
{
hrServer = GetW32TimeServer(FALSE, szExistingServer, ARRAYSIZE(szExistingServer));
GetWindowText(GetDlgItem(m_hwndInternet, DATETIME_INTERNET_SERVER_EDIT), szNextSync, ARRAYSIZE(szNextSync));
// save the new server away for future processing
StrCpyN(szNewServer, szNextSync, ARRAYSIZE(szNewServer));
if (!ContainsServer(szExistingServer, szNextSync))
{
// The servers don't match. We want to add the new server to the beginning of the list. This
// will work around a problem in W32time. If we don't do this, then:
// 1. It will cause a second sync with the original server (which is bad for perf and affects statistics)
// 2. The Last Updated sync time will then be from the wrong peer. This is really bad because it's result is basic
// on the user's previously bad time
// 3. It will do an extra DNS resolution causing slowness on our side, increasing server traffic, and dragging down
// the intranet.
TCHAR szTemp[MAX_URL_STRING];
StrCpyN(szTemp, szNextSync, ARRAYSIZE(szTemp));
wnsprintf(szNextSync, ARRAYSIZE(szNextSync), TEXT("%s %s"), szTemp, szExistingServer);
dwSyncFlags = TimeSyncFlag_ReturnResult | TimeSyncFlag_UpdateAndResync;
}
else
{
// We've already got this server in our list of servers. Just cause our peers to resync.
dwSyncFlags = TimeSyncFlag_ReturnResult | TimeSyncFlag_HardResync;
}
SetW32TimeServer(szNextSync);
// I will ignore the error value because I will get the error info in _CreateW32TimeSuccessErrorString.
dwError = W32TimeSyncNowDDLoad(SZ_COMPUTER_LOCAL, TRUE /* Synchronous */, dwSyncFlags);
if ((ResyncResult_StaleData == dwError) && (0 == (TimeSyncFlag_HardResync & dwSyncFlags)))
{
// We've got stale data preventing us from resyncing. Try again with a full resync.
dwSyncFlags = TimeSyncFlag_ReturnResult | TimeSyncFlag_HardResync;
dwError = W32TimeSyncNowDDLoad(SZ_COMPUTER_LOCAL, TRUE /* Synchronous */, dwSyncFlags);
}
}
pszString[0] = 0;
szNextSync[0] = 0;
hr = _CreateW32TimeSuccessErrorString(dwError, pszString, cchSize, szNextSync, ARRAYSIZE(szNextSync), (SUCCEEDED(hrServer) ? szNewServer : NULL));
if (SUCCEEDED(hrServer))
{
SetW32TimeServer(szExistingServer);
_StartServiceAndRefresh(TRUE); // Make sure the service is on and make it update it's settings.
}
ENTERCRITICAL;
Str_SetPtr(&m_pszNextSyncTime, szNextSync);
if (m_pszStatusString)
{
LocalFree(m_pszStatusString);
}
m_pszStatusString = pszString;
PostMessage(m_hwndInternet, WMUSER_UPDATED_STATUS_TEXT, 0, 0); // Tell the forground thread to pick up the new string.
m_eAction = eBKAWait;
LEAVECRITICAL;
}
}
return hr;
}
// This function is called on the background thread.
void CInternetTime::AsyncCheck(void)
{
HRESULT hr = S_OK;
if (m_hDlg && !DoesTimeComeFromDC())
{
// Tell the forground thread to add us.
PostMessage(m_hwndDate, WMUSER_ADDINTERNETTAB, 0, 0);
_ProcessBkThreadActions();
}
}
// This function is called on the background thread.
HRESULT CInternetTime::_ProcessBkThreadActions(void)
{
HRESULT hr = S_OK;
while (eBKAQuit != m_eAction) // Okay since we are only reading
{
switch (m_eAction)
{
case eBKAGetInfo:
_SyncNow(TRUE);
break;
case eBKAUpdate:
_SyncNow(FALSE);
break;
case eBKAUpdating:
case eBKAWait:
default:
Sleep(300); // We don't care if there is up to 100ms latency between button press and action starting.
break;
}
}
return hr;
}
/////////////////////////////////////////////////////////////////////
// Public Functions
/////////////////////////////////////////////////////////////////////
// This function is called on the forground thread.
EXTERN_C HRESULT AddInternetPageAsync(HWND hDlg, HWND hwndDate)
{
HRESULT hr = E_OUTOFMEMORY;
if (!g_pInternetTime)
{
g_pInternetTime = new CInternetTime(hDlg, hwndDate);
}
if (g_pInternetTime)
{
// We only want to add the page that allows the user to get the time from the internet if:
// 1. The feature is turned on, and
// 2. The user doesn't get the time from an intranet Domain Control.
if (g_pInternetTime->IsInternetTimeAvailable())
{
// Start the thread to find out if we are in a domain and need the advanced page. We need
// to do this on a background thread because the DsGetDcName() API may take 10-20 seconds.
hr = (SHCreateThread(_AsyncCheckDCThread, hDlg, (CTF_INSIST | CTF_FREELIBANDEXIT), NULL) ? S_OK : E_FAIL);
}
}
return hr;
}
// This function is called on the forground thread.
EXTERN_C HRESULT AddInternetTab(HWND hDlg)
{
HRESULT hr = E_OUTOFMEMORY;
if (g_pInternetTime)
{
hr = g_pInternetTime->AddInternetPage();
}
return hr;
}
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