Leaked source code of windows server 2003
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

860 lines
20 KiB

//***************************************************************************
//
// Copyright (c) 1998-1999 Microsoft Corporation
//
// ENUMOBJ.CPP
//
// alanbos 15-Aug-96 Created.
//
// Defines the implementation of ISWbemObjectSet
//
//***************************************************************************
#include "precomp.h"
//***************************************************************************
//
// CSWbemObjectSet::CSWbemObjectSet
//
// DESCRIPTION:
//
// Constructor.
//
//***************************************************************************
CSWbemObjectSet::CSWbemObjectSet(CSWbemServices *pService,
IEnumWbemClassObject *pIEnumWbemClassObject,
CSWbemSecurity *pSecurity)
: m_SecurityInfo (NULL),
m_bIsEmpty (false)
{
m_Dispatch.SetObj (this, IID_ISWbemObjectSet,
CLSID_SWbemObjectSet, L"SWbemObjectSet");
m_cRef=0;
m_firstEnumerator = true;
m_pSWbemServices = pService;
if (m_pSWbemServices)
{
m_pSWbemServices->AddRef ();
if (pSecurity)
m_SecurityInfo = new CSWbemSecurity (pIEnumWbemClassObject, pSecurity);
else
{
pSecurity = m_pSWbemServices->GetSecurityInfo ();
m_SecurityInfo = new CSWbemSecurity (pIEnumWbemClassObject, pSecurity);
if (pSecurity)
pSecurity->Release ();
}
}
InterlockedIncrement(&g_cObj);
}
CSWbemObjectSet::CSWbemObjectSet (void)
: m_SecurityInfo (NULL),
m_cRef (0),
m_firstEnumerator (true),
m_bIsEmpty (true),
m_pSWbemServices (NULL)
{
m_Dispatch.SetObj (this, IID_ISWbemObjectSet,
CLSID_SWbemObjectSet, L"SWbemObjectSet");
InterlockedIncrement(&g_cObj);
}
//***************************************************************************
//
// CSWbemObjectSet::~CSWbemObjectSet
//
// DESCRIPTION:
//
// Destructor.
//
//***************************************************************************
CSWbemObjectSet::~CSWbemObjectSet(void)
{
InterlockedDecrement(&g_cObj);
RELEASEANDNULL(m_pSWbemServices)
RELEASEANDNULL(m_SecurityInfo)
}
//***************************************************************************
// HRESULT CSWbemObjectSet::QueryInterface
// long CSWbemObjectSet::AddRef
// long CSWbemObjectSet::Release
//
// DESCRIPTION:
//
// Standard Com IUNKNOWN functions.
//
//***************************************************************************
STDMETHODIMP CSWbemObjectSet::QueryInterface (
IN REFIID riid,
OUT LPVOID *ppv
)
{
*ppv=NULL;
if (IID_IUnknown==riid)
*ppv = reinterpret_cast<IUnknown*>(this);
else if (IID_ISWbemObjectSet==riid)
*ppv = (ISWbemObjectSet *)this;
else if (IID_IDispatch==riid)
*ppv = (IDispatch *)this;
else if (IID_ISupportErrorInfo==riid)
*ppv = (ISupportErrorInfo *)this;
else if (IID_IProvideClassInfo==riid)
*ppv = (IProvideClassInfo *)this;
if (NULL!=*ppv)
{
((LPUNKNOWN)*ppv)->AddRef();
return NOERROR;
}
return ResultFromScode(E_NOINTERFACE);
}
STDMETHODIMP_(ULONG) CSWbemObjectSet::AddRef(void)
{
InterlockedIncrement(&m_cRef);
return m_cRef;
}
STDMETHODIMP_(ULONG) CSWbemObjectSet::Release(void)
{
LONG cRef = InterlockedDecrement(&m_cRef);
if (0 != cRef)
{
_ASSERT(cRef > 0);
return cRef;
}
delete this;
return 0;
}
//***************************************************************************
// HRESULT CSWbemObjectSet::InterfaceSupportsErrorInfo
//
// DESCRIPTION:
//
// Standard Com ISupportErrorInfo functions.
//
//***************************************************************************
STDMETHODIMP CSWbemObjectSet::InterfaceSupportsErrorInfo (IN REFIID riid)
{
return (IID_ISWbemObjectSet == riid) ? S_OK : S_FALSE;
}
//***************************************************************************
//
// SCODE CSWbemObjectSet::Reset
//
// DESCRIPTION:
//
// Reset the enumeration
//
// PARAMETERS:
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemObjectSet::Reset ()
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (m_SecurityInfo)
{
IEnumWbemClassObject *pIEnumWbemClassObject =
(IEnumWbemClassObject *) m_SecurityInfo->GetProxy ();
if (pIEnumWbemClassObject)
{
bool needToResetSecurity = false;
HANDLE hThreadToken = NULL;
if (m_SecurityInfo->SetSecurity (needToResetSecurity, hThreadToken))
hr = pIEnumWbemClassObject->Reset ();
pIEnumWbemClassObject->Release ();
if (needToResetSecurity)
m_SecurityInfo->ResetSecurity (hThreadToken);
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemObjectSet::Next
//
// DESCRIPTION:
//
// Get the next object in the enumeration
//
// PARAMETERS:
//
// lTimeout Number of ms to wait for object (or WBEM_INFINITE for
// indefinite)
// ppObject On return may contain the next element (if any)
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemObjectSet::Next (
long lTimeout,
ISWbemObject **ppObject
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (NULL == ppObject)
hr = WBEM_E_INVALID_PARAMETER;
else if (m_SecurityInfo)
{
IEnumWbemClassObject *pIEnumWbemClassObject =
(IEnumWbemClassObject *) m_SecurityInfo->GetProxy ();
if (pIEnumWbemClassObject)
{
*ppObject = NULL;
IWbemClassObject *pIWbemClassObject = NULL;
ULONG returned = 0;
bool needToResetSecurity = false;
HANDLE hThreadToken = NULL;
if (m_SecurityInfo->SetSecurity (needToResetSecurity, hThreadToken))
hr = pIEnumWbemClassObject->Next (lTimeout, 1, &pIWbemClassObject, &returned);
if (needToResetSecurity)
m_SecurityInfo->ResetSecurity (hThreadToken);
if (SUCCEEDED(hr) && (0 < returned) && pIWbemClassObject)
{
CSWbemObject *pObject = new CSWbemObject (m_pSWbemServices, pIWbemClassObject,
m_SecurityInfo);
if (!pObject)
hr = WBEM_E_OUT_OF_MEMORY;
else if (FAILED(hr = pObject->QueryInterface (IID_ISWbemObject,
(PPVOID) ppObject)))
delete pObject;
pIWbemClassObject->Release ();
}
else if (WBEM_S_TIMEDOUT == hr)
{
/*
* Since a timeout would be indistinguishable from an end-of-enumeration
* we flag it as a real error rather than an S-CODE.
*/
hr = wbemErrTimedout;
}
SetWbemError (m_pSWbemServices);
pIEnumWbemClassObject->Release ();
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemObjectSet::Clone
//
// DESCRIPTION:
//
// Create a copy of this enumeration
//
// PARAMETERS:
//
// ppEnum on successful return addresses the clone
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemObjectSet::Clone (
ISWbemObjectSet **ppEnum
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (NULL == ppEnum)
hr = WBEM_E_INVALID_PARAMETER;
else if (m_SecurityInfo)
{
IEnumWbemClassObject *pIEnumWbemClassObject =
(IEnumWbemClassObject *) m_SecurityInfo->GetProxy ();
if (pIEnumWbemClassObject)
{
*ppEnum = NULL;
IEnumWbemClassObject *pIWbemEnum = NULL;
bool needToResetSecurity = false;
HANDLE hThreadToken = NULL;
if (m_SecurityInfo->SetSecurity (needToResetSecurity, hThreadToken))
hr = pIEnumWbemClassObject->Clone (&pIWbemEnum);
if (needToResetSecurity)
m_SecurityInfo->ResetSecurity (hThreadToken);
if (WBEM_S_NO_ERROR == hr)
{
CSWbemObjectSet *pEnum = new CSWbemObjectSet (m_pSWbemServices, pIWbemEnum,
m_SecurityInfo);
if (!pEnum)
hr = WBEM_E_OUT_OF_MEMORY;
else if (FAILED(hr = pEnum->QueryInterface (IID_ISWbemObjectSet, (PPVOID) ppEnum)))
delete pEnum;
pIWbemEnum->Release ();
}
SetWbemError (m_pSWbemServices);
pIEnumWbemClassObject->Release ();
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemObjectSet::Skip
//
// DESCRIPTION:
//
// Skip over some objects in the enumeration
//
// PARAMETERS:
//
// lElements Number of elements to skip
// lTimeout Number of ms to wait for object (or WBEM_INFINITE for
// indefinite)
//
// RETURN VALUES:
//
// S_OK success
// S_FALSE otherwise
//
//***************************************************************************
HRESULT CSWbemObjectSet::Skip (
ULONG lElements,
long lTimeout
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (m_SecurityInfo)
{
IEnumWbemClassObject *pIEnumWbemClassObject =
(IEnumWbemClassObject *) m_SecurityInfo->GetProxy ();
if (pIEnumWbemClassObject)
{
bool needToResetSecurity = false;
HANDLE hThreadToken = NULL;
if (m_SecurityInfo->SetSecurity (needToResetSecurity, hThreadToken))
hr = pIEnumWbemClassObject->Skip (lTimeout, lElements);
if (needToResetSecurity)
m_SecurityInfo->ResetSecurity (hThreadToken);
/*
* Since a timeout would be indistinguishable from an end-of-enumeration
* we flag it as a real error rather than an S-CODE.
*/
if (WBEM_S_TIMEDOUT == hr)
hr = wbemErrTimedout;
SetWbemError (m_pSWbemServices);
pIEnumWbemClassObject->Release ();
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemObjectSet::get__NewEnum
//
// DESCRIPTION:
//
// Return an IEnumVARIANT-supporting interface for collections
//
// PARAMETERS:
//
// ppUnk on successful return addresses the IUnknown interface
//
// RETURN VALUES:
//
// S_OK success
// E_FAIL otherwise
//
//***************************************************************************
HRESULT CSWbemObjectSet::get__NewEnum (
IUnknown **ppUnk
)
{
HRESULT hr = E_FAIL;
ResetLastErrors ();
if (NULL != ppUnk)
{
*ppUnk = NULL;
CEnumVar *pEnumVar = NULL;
if (m_bIsEmpty)
{
if (!(pEnumVar = new CEnumVar ()))
hr = WBEM_E_OUT_OF_MEMORY;
}
else
{
/*
* If this is the first enumerator, use ourselves as the underlying
* iterator. Otherwise clone a copy and use that.
*/
if (m_firstEnumerator)
{
if (!(pEnumVar = new CEnumVar (this)))
hr = WBEM_E_OUT_OF_MEMORY;
else
m_firstEnumerator = false;
}
else
{
CSWbemObjectSet *pNewEnum = NULL;
/*
* Try to reset the cloned enumerator. This may not always
* succeed, as some IEnumWbemClassObject's may not be
* rewindable.
*/
if (SUCCEEDED (CloneObjectSet (&pNewEnum)))
{
HRESULT hr2 = pNewEnum->Reset ();
if (!(pEnumVar = new CEnumVar (pNewEnum)))
hr = WBEM_E_OUT_OF_MEMORY;
pNewEnum->Release ();
}
}
}
if (pEnumVar)
if (FAILED(hr = pEnumVar->QueryInterface (IID_IUnknown, (PPVOID) ppUnk)))
delete pEnumVar;
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemObjectSet::get_Count
//
// DESCRIPTION:
//
// Return the number of items in the collection
//
// PARAMETERS:
//
// plCount on successful return addresses the count
//
// RETURN VALUES:
//
// S_OK success
// E_FAIL otherwise
//
//***************************************************************************
HRESULT CSWbemObjectSet::get_Count (
long *plCount
)
{
HRESULT hr = E_FAIL;
ResetLastErrors ();
if (NULL != plCount)
{
*plCount = 0;
if (m_bIsEmpty)
hr = WBEM_S_NO_ERROR;
else if (m_SecurityInfo)
{
IEnumWbemClassObject *pIEnumWbemClassObject =
(IEnumWbemClassObject *) m_SecurityInfo->GetProxy ();
if (pIEnumWbemClassObject)
{
/*
* Work out the current count - clone the object to avoid messing
* with the iterator.
*/
IEnumWbemClassObject *pNewEnum = NULL;
bool needToResetSecurity = false;
HANDLE hThreadToken = NULL;
if (m_SecurityInfo->SetSecurity (needToResetSecurity, hThreadToken))
{
if (WBEM_S_NO_ERROR == pIEnumWbemClassObject->Clone (&pNewEnum))
{
// Secure the enumerator
m_SecurityInfo->SecureInterface (pNewEnum);
/*
* This will fail if the enumerator was created with the
* WBEM_FLAG_FORWARD_ONLY option.
*/
if (WBEM_S_NO_ERROR == pNewEnum->Reset ())
{
IWbemClassObject *pObject = NULL;
ULONG lReturned = 0;
HRESULT hrEnum;
// Iterate through the enumerator to count the elements
while (SUCCEEDED(hrEnum = pNewEnum->Next (INFINITE, 1, &pObject, &lReturned)))
{
if (0 == lReturned)
break; // We are done
// Getting here means we have at least one object returned
(*plCount) ++;
pObject->Release ();
}
if (SUCCEEDED(hrEnum))
hr = S_OK;
else
hr = hrEnum;
}
pNewEnum->Release ();
}
}
if (needToResetSecurity)
m_SecurityInfo->ResetSecurity (hThreadToken);
pIEnumWbemClassObject->Release ();
}
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemObjectSet::Item
//
// DESCRIPTION:
//
// Get object from the enumeration by path.
//
// PARAMETERS:
//
// bsObjectPath The path of the object to retrieve
// lFlags Flags
// ppNamedObject On successful return addresses the object
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemObjectSet::Item (
BSTR bsObjectPath,
long lFlags,
ISWbemObject **ppObject
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if ((NULL == ppObject) || (NULL == bsObjectPath))
hr = WBEM_E_INVALID_PARAMETER;
else if (!m_bIsEmpty)
{
CWbemPathCracker objectPath;
if (objectPath = bsObjectPath)
{
if (m_SecurityInfo)
{
IEnumWbemClassObject *pIEnumWbemClassObject =
(IEnumWbemClassObject *) m_SecurityInfo->GetProxy ();
if (pIEnumWbemClassObject)
{
/*
* Try to find the object - clone the object to avoid messing
* with the iterator.
*/
IEnumWbemClassObject *pNewEnum = NULL;
bool needToResetSecurity = false;
HANDLE hThreadToken = NULL;
if (m_SecurityInfo->SetSecurity (needToResetSecurity, hThreadToken))
{
if (WBEM_S_NO_ERROR == pIEnumWbemClassObject->Clone (&pNewEnum))
{
// Secure the enumerator
m_SecurityInfo->SecureInterface (pNewEnum);
/*
* This will fail if the enumerator was created with the
* WBEM_FLAG_FORWARD_ONLY option.
*/
if (WBEM_S_NO_ERROR == pNewEnum->Reset ())
{
CComPtr<IWbemClassObject> pIWbemClassObject;
ULONG lReturned = 0;
bool found = false;
hr = WBEM_E_NOT_FOUND;
// Iterate through the enumerator to try to find the element with the
// specified path.
while (!found &&
(WBEM_S_NO_ERROR == pNewEnum->Next (INFINITE, 1, &pIWbemClassObject, &lReturned)))
{
// Getting here means we have at least one object returned; check the
// path
if (CSWbemObjectPath::CompareObjectPaths (pIWbemClassObject, objectPath))
{
// Found it - assign to passed interface and break out
found = true;
CSWbemObject *pObject = new CSWbemObject (m_pSWbemServices,
pIWbemClassObject, m_SecurityInfo);
if (!pObject)
hr = WBEM_E_OUT_OF_MEMORY;
else if (FAILED(pObject->QueryInterface (IID_ISWbemObject,
(PPVOID) ppObject)))
{
hr = WBEM_E_FAILED;
delete pObject;
}
}
pIWbemClassObject.Release();
}
if (found)
hr = S_OK;
}
pNewEnum->Release ();
}
}
// Restore original privileges on this thread
if (needToResetSecurity)
m_SecurityInfo->ResetSecurity (hThreadToken);
pIEnumWbemClassObject->Release ();
}
}
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemObjectSet::get_Security_
//
// DESCRIPTION:
//
// Return the security configurator
//
// WBEM_S_NO_ERROR success
// WBEM_E_INVALID_PARAMETER bad input parameters
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemObjectSet::get_Security_ (
ISWbemSecurity **ppSecurity
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (NULL == ppSecurity)
hr = WBEM_E_INVALID_PARAMETER;
else // Bug ID 566345
{
*ppSecurity = NULL;
if (m_SecurityInfo)
{
*ppSecurity = m_SecurityInfo;
(*ppSecurity)->AddRef ();
hr = WBEM_S_NO_ERROR;
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}
//***************************************************************************
//
// SCODE CSWbemObjectSet::CloneObjectSet
//
// DESCRIPTION:
//
// Create a copy of this enumeration, returning a coclass not an interface
//
// PARAMETERS:
//
// ppEnum on successful return addresses the clone
//
// RETURN VALUES:
//
// WBEM_S_NO_ERROR success
// WBEM_E_FAILED otherwise
//
//***************************************************************************
HRESULT CSWbemObjectSet::CloneObjectSet (
CSWbemObjectSet **ppEnum
)
{
HRESULT hr = WBEM_E_FAILED;
ResetLastErrors ();
if (NULL == ppEnum)
hr = WBEM_E_INVALID_PARAMETER;
else
{
*ppEnum = NULL;
if (m_SecurityInfo)
{
IEnumWbemClassObject *pIEnumWbemClassObject =
(IEnumWbemClassObject *) m_SecurityInfo->GetProxy ();
if (pIEnumWbemClassObject)
{
IEnumWbemClassObject *pIWbemEnum = NULL;
bool needToResetSecurity = false;
HANDLE hThreadToken = NULL;
if (m_SecurityInfo->SetSecurity (needToResetSecurity, hThreadToken))
hr = pIEnumWbemClassObject->Clone (&pIWbemEnum);
if (needToResetSecurity)
m_SecurityInfo->ResetSecurity (hThreadToken);
if (WBEM_S_NO_ERROR == hr)
{
*ppEnum = new CSWbemObjectSet (m_pSWbemServices, pIWbemEnum,
m_SecurityInfo);
if (!(*ppEnum))
hr = WBEM_E_OUT_OF_MEMORY;
else
(*ppEnum)->AddRef ();
pIWbemEnum->Release ();
}
SetWbemError (m_pSWbemServices);
pIEnumWbemClassObject->Release ();
}
}
}
if (FAILED(hr))
m_Dispatch.RaiseException (hr);
return hr;
}