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windows-nt/Source/XPSP1/NT/shell/services/themesrv/themeserverclient.cpp

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// --------------------------------------------------------------------------
// Module Name: ThemeServerClient.cpp
//
// Copyright (c) 2000, Microsoft Corporation
//
// This file contains a class that implements the theme server functions that
// are executed in a client context (winlogon context).
//
// History: 2000-11-29 vtan created
// --------------------------------------------------------------------------
#include "StandardHeader.h"
#include "ThemeServerClient.h"
#include <lpcthemes.h>
#include <uxthemep.h>
#include <UxThemeServer.h>
#include "SingleThreadedExecution.h"
#include "StatusCode.h"
#include "ThemeManagerService.h"
#include <Impersonation.h>
// --------------------------------------------------------------------------
// CThemeManagerAPI::s_pThemeManagerAPIServer
// CThemeManagerAPI::s_hPort
// CThemeManagerAPI::s_hToken
// CThemeManagerAPI::s_hEvent
// CThemeManagerAPI::s_hWaitObject
// CThemeManagerAPI::s_pLock
//
// Purpose: Static member variables.
//
// History: 2000-11-29 vtan created
// --------------------------------------------------------------------------
CThemeManagerAPIServer* CThemeServerClient::s_pThemeManagerAPIServer = NULL;
HANDLE CThemeServerClient::s_hPort = NULL;
HANDLE CThemeServerClient::s_hToken = NULL;
HANDLE CThemeServerClient::s_hEvent = NULL;
HANDLE CThemeServerClient::s_hWaitObject = NULL;
HMODULE CThemeServerClient::s_hModuleUxTheme = NULL;
CCriticalSection* CThemeServerClient::s_pLock = NULL;
// --------------------------------------------------------------------------
// CThemeServerClient::WaitForServiceReady
//
// Arguments: dwTimeout = Number of ticks to wait.
//
// Returns: DWORD
//
// Purpose: Check if the service is autostart. If so then wait the
// designated amount of time for the service. If the service
// is then running or was running but isn't autostart then
// re-establish the connection to the server.
//
// History: 2000-10-10 vtan created
// 2000-11-29 vtan converted to a Win32 service
// --------------------------------------------------------------------------
DWORD CThemeServerClient::WaitForServiceReady (DWORD dwTimeout)
{
DWORD dwWaitResult;
NTSTATUS status;
dwWaitResult = WAIT_TIMEOUT;
if (s_pThemeManagerAPIServer->IsAutoStart())
{
status = s_pThemeManagerAPIServer->Wait(dwTimeout);
#ifdef DBG
if (STATUS_TIMEOUT == status)
{
INFORMATIONMSG("Wait on auto start theme service timed out.");
}
#endif /* DBG */
}
else
{
status = STATUS_SUCCESS;
}
if (NT_SUCCESS(status) && s_pThemeManagerAPIServer->IsRunning())
{
status = ReestablishConnection();
if (NT_SUCCESS(status))
{
THR(InitUserRegistry());
THR(InitUserTheme(FALSE));
dwWaitResult = WAIT_OBJECT_0;
}
}
return(dwWaitResult);
}
// --------------------------------------------------------------------------
// CThemeServerClient::WatchForStart
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Opens or creates the theme server announce event. This is a
// manual reset event which the theme server pulses when it
// starts up. This allows winlogon to initiate new connections
// to the theme server without having to wait for logon or
// logoff events to happen.
//
// This event is intentionally leaked and cleaned up when the
// winlogon process for the session goes away.
//
// History: 2000-11-29 vtan created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::WatchForStart (void)
{
NTSTATUS status;
s_hEvent = CThemeManagerService::OpenStartEvent(NtCurrentPeb()->SessionId, SYNCHRONIZE);
if (s_hEvent != NULL)
{
if (RegisterWaitForSingleObject(&s_hWaitObject,
s_hEvent,
CB_ServiceStart,
NULL,
INFINITE,
WT_EXECUTEDEFAULT | WT_EXECUTEONLYONCE) != FALSE)
{
status = STATUS_SUCCESS;
}
else
{
status = CStatusCode::StatusCodeOfLastError();
}
}
else
{
status = CStatusCode::StatusCodeOfLastError();
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::UserLogon
//
// Arguments: hToken = Token of user logging on.
//
// Returns: NTSTATUS
//
// Purpose: Signals the server that a user is logging on and gives the
// server the handle to the token. The server will grant access
// to the port based on the user's logon SID. Then perform work
// to initialize the environment for the user logging on.
//
// History: 2000-10-10 vtan created
// 2000-11-29 vtan converted to a Win32 service
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::UserLogon (HANDLE hToken)
{
NTSTATUS status;
status = NotifyUserLogon(hToken);
if (STATUS_PORT_DISCONNECTED == status)
{
status = ReestablishConnection();
if (NT_SUCCESS(status))
{
status = NotifyUserLogon(hToken);
}
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::UserLogoff
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Signals the server that the current user for this session is
// logging off. The server will remove the access that was
// granted at logon and reinitialize the theme settings to the
// ".Default" settings.
//
// History: 2000-10-10 vtan created
// 2000-11-29 vtan converted to a Win32 service
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::UserLogoff (void)
{
NTSTATUS status;
status = NotifyUserLogoff();
if (STATUS_PORT_DISCONNECTED == status)
{
status = ReestablishConnection();
if (NT_SUCCESS(status))
{
status = NotifyUserLogoff();
}
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::UserInitTheme
//
// Arguments: BOOL
//
// Returns: NTSTATUS
//
// Purpose: Called at logon, or when Terminal Server connects a user to a
// remote session or reconnects to a local session. Needs to
// evaluate the environment and decide if themes need to be loaded
// or unloaded.
//
// History: 2000-01-18 rfernand created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::UserInitTheme (BOOL fPolicyCheckOnly)
{
bool fSuccessfulImpersonation;
// If there's a token impersonate the user. Otherwise use the system context.
if (s_hToken != NULL)
{
fSuccessfulImpersonation = NT_SUCCESS(CImpersonation::ImpersonateUser(GetCurrentThread(), s_hToken));
}
else
{
fSuccessfulImpersonation = true;
}
if (fSuccessfulImpersonation)
{
(HRESULT)InitUserTheme(fPolicyCheckOnly);
}
if (fSuccessfulImpersonation && (s_hToken != NULL))
{
TBOOL(RevertToSelf());
}
return STATUS_SUCCESS;
}
// --------------------------------------------------------------------------
// CThemeServerClient::StaticInitialize
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Initializes static member variables. Allocate a
// CThemeManagerAPIServer and a lock for this object.
//
// History: 2000-11-29 vtan created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::StaticInitialize (void)
{
NTSTATUS status;
if (s_pThemeManagerAPIServer == NULL)
{
status = STATUS_NO_MEMORY;
s_pThemeManagerAPIServer = new CThemeManagerAPIServer;
if (s_pThemeManagerAPIServer != NULL)
{
s_pLock = new CCriticalSection;
if (s_pLock != NULL)
{
status = STATUS_SUCCESS;
}
}
}
else
{
status = STATUS_SUCCESS;
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::StaticTerminate
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Release static member variables initialized.
//
// History: 2000-11-29 vtan created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::StaticTerminate (void)
{
if (s_pLock != NULL)
{
delete s_pLock;
s_pLock = NULL;
}
if (s_pThemeManagerAPIServer != NULL)
{
s_pThemeManagerAPIServer->Release();
s_pThemeManagerAPIServer = NULL;
}
return(STATUS_SUCCESS);
}
// --------------------------------------------------------------------------
// CThemeServerClient::NotifyUserLogon
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Execute the send message to the server and tell it that the
// given user is now logged on. This will instruct the server
// to grant access to the ThemeApiPort.
//
// History: 2000-11-29 vtan created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::NotifyUserLogon (HANDLE hToken)
{
NTSTATUS status;
CSingleThreadedExecution lock(*s_pLock);
if (s_hPort != NULL)
{
status = InformServerUserLogon(hToken);
}
else
{
status = STATUS_PORT_DISCONNECTED;
}
// Keep a copy of the token as well in case of demand start of
// the theme server so we can impersonate the user when we load
// their theme using InitUserTheme. Don't copy it if it already
// exists.
if (s_hToken == NULL)
{
TBOOL(DuplicateHandle(GetCurrentProcess(),
hToken,
GetCurrentProcess(),
&s_hToken,
0,
FALSE,
DUPLICATE_SAME_ACCESS));
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::NotifyUserLogoff
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Tell the server that the logged on user is logged off. This
// will remove access to ThemeApiPort.
//
// History: 2000-11-29 vtan created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::NotifyUserLogoff (void)
{
NTSTATUS status;
CSingleThreadedExecution lock(*s_pLock);
if (s_hToken != NULL)
{
ReleaseHandle(s_hToken);
if (s_hPort != NULL)
{
status = InformServerUserLogoff();
}
else
{
status = STATUS_PORT_DISCONNECTED;
}
}
else
{
status = STATUS_SUCCESS;
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::InformServerUserLogon
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Tell the server that the logged on user is logged off. This
// will remove access to ThemeApiPort.
//
// History: 2000-12-05 vtan created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::InformServerUserLogon (HANDLE hToken)
{
NTSTATUS status;
THEMESAPI_PORT_MESSAGE portMessageIn, portMessageOut;
ZeroMemory(&portMessageIn, sizeof(portMessageIn));
ZeroMemory(&portMessageOut, sizeof(portMessageOut));
portMessageIn.apiThemes.apiGeneric.ulAPINumber = API_THEMES_USERLOGON;
portMessageIn.apiThemes.apiSpecific.apiUserLogon.in.hToken = hToken;
portMessageIn.portMessage.u1.s1.DataLength = sizeof(API_THEMES);
portMessageIn.portMessage.u1.s1.TotalLength = static_cast<CSHORT>(sizeof(THEMESAPI_PORT_MESSAGE));
status = NtRequestWaitReplyPort(s_hPort,
&portMessageIn.portMessage,
&portMessageOut.portMessage);
if (NT_SUCCESS(status))
{
status = portMessageOut.apiThemes.apiGeneric.status;
if (NT_SUCCESS(status))
{
THR(InitUserTheme(FALSE));
}
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::InformServerUserLogoff
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Tell the server that the logged on user is logged off. This
// will remove access to ThemeApiPort.
//
// History: 2000-12-05 vtan created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::InformServerUserLogoff (void)
{
NTSTATUS status;
THEMESAPI_PORT_MESSAGE portMessageIn, portMessageOut;
ZeroMemory(&portMessageIn, sizeof(portMessageIn));
ZeroMemory(&portMessageOut, sizeof(portMessageOut));
portMessageIn.apiThemes.apiGeneric.ulAPINumber = API_THEMES_USERLOGOFF;
portMessageIn.portMessage.u1.s1.DataLength = sizeof(API_THEMES);
portMessageIn.portMessage.u1.s1.TotalLength = static_cast<CSHORT>(sizeof(THEMESAPI_PORT_MESSAGE));
status = NtRequestWaitReplyPort(s_hPort,
&portMessageIn.portMessage,
&portMessageOut.portMessage);
if (NT_SUCCESS(status))
{
status = portMessageOut.apiThemes.apiGeneric.status;
if (NT_SUCCESS(status))
{
THR(InitUserRegistry());
THR(InitUserTheme(FALSE));
}
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::SessionCreate
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Signal the server that a new session is being created. This
// allows the server to allocate a data blob for this session.
//
// History: 2000-11-11 vtan created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::SessionCreate (void)
{
NTSTATUS status;
CSingleThreadedExecution lock(*s_pLock);
if (s_hModuleUxTheme == NULL)
{
s_hModuleUxTheme = LoadLibrary(TEXT("uxtheme.dll"));
}
if (s_hModuleUxTheme != NULL)
{
void *pfnRegister, *pfnUnregister, *pfnClearStockObjects;
// Get the uxtheme function addresses in this process address space.
// 34 = ThemeHooksInstall
// 35 = ThemeHooksRemove
// 62 = ServerClearStockObjects
pfnRegister = GetProcAddress(s_hModuleUxTheme, MAKEINTRESOURCEA(34));
pfnUnregister = GetProcAddress(s_hModuleUxTheme, MAKEINTRESOURCEA(35));
pfnClearStockObjects = GetProcAddress(s_hModuleUxTheme, MAKEINTRESOURCEA(62));
if ((pfnRegister != NULL) && (pfnUnregister != NULL) && (pfnClearStockObjects != NULL))
{
DWORD dwStackSizeReserve, dwStackSizeCommit;
ULONG ulReturnLength;
IMAGE_NT_HEADERS *pNTHeaders;
SYSTEM_BASIC_INFORMATION systemBasicInformation;
THEMESAPI_PORT_MESSAGE portMessageIn, portMessageOut;
// Get system basic information for stack size defaults.
status = NtQuerySystemInformation(SystemBasicInformation,
&systemBasicInformation,
sizeof(systemBasicInformation),
&ulReturnLength);
if (NT_SUCCESS(status))
{
dwStackSizeReserve = systemBasicInformation.AllocationGranularity;
dwStackSizeCommit = systemBasicInformation.PageSize;
}
else
{
dwStackSizeReserve = dwStackSizeCommit = 0;
}
// Go to the image header for this process and get the stack size
// defaults if they are specified. Otherwise use system defaults (above).
pNTHeaders = RtlImageNtHeader(NtCurrentPeb()->ImageBaseAddress);
if (pNTHeaders != NULL)
{
dwStackSizeReserve = static_cast<DWORD>(pNTHeaders->OptionalHeader.SizeOfStackReserve);
dwStackSizeCommit = static_cast<DWORD>(pNTHeaders->OptionalHeader.SizeOfStackCommit);
}
// Make the call.
ZeroMemory(&portMessageIn, sizeof(portMessageIn));
ZeroMemory(&portMessageOut, sizeof(portMessageOut));
portMessageIn.apiThemes.apiGeneric.ulAPINumber = API_THEMES_SESSIONCREATE;
portMessageIn.apiThemes.apiSpecific.apiSessionCreate.in.pfnRegister = pfnRegister;
portMessageIn.apiThemes.apiSpecific.apiSessionCreate.in.pfnUnregister = pfnUnregister;
portMessageIn.apiThemes.apiSpecific.apiSessionCreate.in.pfnClearStockObjects = pfnClearStockObjects;
portMessageIn.apiThemes.apiSpecific.apiSessionCreate.in.dwStackSizeReserve = dwStackSizeReserve;
portMessageIn.apiThemes.apiSpecific.apiSessionCreate.in.dwStackSizeCommit = dwStackSizeCommit;
portMessageIn.portMessage.u1.s1.DataLength = sizeof(API_THEMES);
portMessageIn.portMessage.u1.s1.TotalLength = static_cast<CSHORT>(sizeof(THEMESAPI_PORT_MESSAGE));
status = NtRequestWaitReplyPort(s_hPort,
&portMessageIn.portMessage,
&portMessageOut.portMessage);
if (NT_SUCCESS(status))
{
status = portMessageOut.apiThemes.apiGeneric.status;
}
}
else
{
status = CStatusCode::StatusCodeOfLastError();
}
}
else
{
status = CStatusCode::StatusCodeOfLastError();
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::SessionDestroy
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Signal the server that the current session is about to be
// destroyed. This allows the server to release the data blob
// allocated.
//
// History: 2000-11-11 vtan created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::SessionDestroy (void)
{
NTSTATUS status;
THEMESAPI_PORT_MESSAGE portMessageIn, portMessageOut;
CSingleThreadedExecution lock(*s_pLock);
ZeroMemory(&portMessageIn, sizeof(portMessageIn));
ZeroMemory(&portMessageOut, sizeof(portMessageOut));
portMessageIn.apiThemes.apiGeneric.ulAPINumber = API_THEMES_SESSIONDESTROY;
portMessageIn.portMessage.u1.s1.DataLength = sizeof(API_THEMES);
portMessageIn.portMessage.u1.s1.TotalLength = static_cast<CSHORT>(sizeof(THEMESAPI_PORT_MESSAGE));
status = NtRequestWaitReplyPort(s_hPort,
&portMessageIn.portMessage,
&portMessageOut.portMessage);
if (NT_SUCCESS(status))
{
status = portMessageOut.apiThemes.apiGeneric.status;
}
if (s_hModuleUxTheme != NULL)
{
TBOOL(FreeLibrary(s_hModuleUxTheme));
s_hModuleUxTheme = NULL;
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::ReestablishConnection
//
// Arguments: <none>
//
// Returns: NTSTATUS
//
// Purpose: Reconnects to theme server. If the reconnection is established
// the re-create the session data. This will not correct any
// disconnected ports that some clients may have but because this
// is called in winlogon it re-establish this correctly for
// session 0 in all cases.
//
// UnregisterUserApiHook must be called to clear any left over
// registrations from a server that died. Then go ahead and
// re-initialize the environment anyway.
//
// History: 2000-11-17 vtan created
// --------------------------------------------------------------------------
NTSTATUS CThemeServerClient::ReestablishConnection (void)
{
NTSTATUS status;
ReleaseHandle(s_hPort);
status = s_pThemeManagerAPIServer->ConnectToServer(&s_hPort);
if (NT_SUCCESS(status))
{
status = SessionCreate();
if (NT_SUCCESS(status))
{
(BOOL)UnregisterUserApiHook();
THR(ReestablishServerConnection());
}
}
return(status);
}
// --------------------------------------------------------------------------
// CThemeServerClient::CB_ServiceStart
//
// Arguments: pParameter = User parameter.
// TimerOrWaitFired = Timer or wait fired.
//
// Returns: <none>
//
// Purpose: Callback called when the theme server ready event is signaled.
// This indicates that the service was demand started or
// restarted in the event of failure.
//
// History: 2000-11-29 vtan created
// --------------------------------------------------------------------------
void CALLBACK CThemeServerClient::CB_ServiceStart (void *pParameter, BOOLEAN TimerOrWaitFired)
{
UNREFERENCED_PARAMETER(pParameter);
UNREFERENCED_PARAMETER(TimerOrWaitFired);
NTSTATUS status;
CSingleThreadedExecution lock(*s_pLock);
// If there is a connection ping it.
if (s_hPort != NULL)
{
THEMESAPI_PORT_MESSAGE portMessageIn, portMessageOut;
ZeroMemory(&portMessageIn, sizeof(portMessageIn));
ZeroMemory(&portMessageOut, sizeof(portMessageOut));
portMessageIn.apiThemes.apiGeneric.ulAPINumber = API_THEMES_PING;
portMessageIn.portMessage.u1.s1.DataLength = sizeof(API_THEMES);
portMessageIn.portMessage.u1.s1.TotalLength = static_cast<CSHORT>(sizeof(THEMESAPI_PORT_MESSAGE));
status = NtRequestWaitReplyPort(s_hPort,
&portMessageIn.portMessage,
&portMessageOut.portMessage);
if (NT_SUCCESS(status))
{
status = portMessageOut.apiThemes.apiGeneric.status;
}
}
else
{
status = STATUS_PORT_DISCONNECTED;
}
if (STATUS_PORT_DISCONNECTED == status)
{
HDESK hDeskCurrent, hDeskInput;
// Set this thread's desktop to the input desktop so
// that the theme change can be broadcast to the input
// desktop. This is Default in most cases where a logged
// on user is active but in the non-logged on user case
// this will be Winlogon. Restore the thread's desktop
// when done.
TSTATUS(ReestablishConnection());
hDeskCurrent = hDeskInput = NULL;
if (s_hToken != NULL)
{
hDeskCurrent = GetThreadDesktop(GetCurrentThreadId());
hDeskInput = OpenInputDesktop(0, FALSE, MAXIMUM_ALLOWED);
if ((hDeskCurrent != NULL) && (hDeskInput != NULL))
{
TBOOL(SetThreadDesktop(hDeskInput));
}
if (NT_SUCCESS(CImpersonation::ImpersonateUser(GetCurrentThread(), s_hToken)))
{
TSTATUS(InformServerUserLogon(s_hToken));
}
if ((hDeskCurrent != NULL) && (hDeskInput != NULL))
{
SetThreadDesktop(hDeskCurrent);
(BOOL)CloseDesktop(hDeskInput);
}
TBOOL(RevertToSelf());
}
else
{
THR(InitUserRegistry());
THR(InitUserTheme(FALSE));
}
}
// Reset the event here and now.
TBOOL(ResetEvent(s_hEvent));
// Unregister the original wait (it only executes once anyway). This
// call will return a failure code with the callback in progress.
// Ignore this error. The thread pool will clean up the wait.
(BOOL)UnregisterWait(s_hWaitObject);
// Reregister the wait as execute once only again waiting for
// the next time the event is signaled.
TBOOL(RegisterWaitForSingleObject(&s_hWaitObject,
s_hEvent,
CB_ServiceStart,
NULL,
INFINITE,
WT_EXECUTEDEFAULT | WT_EXECUTEONLYONCE));
}
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