Leaked source code of windows server 2003
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//+-------------------------------------------------------------------------
//
// Microsoft Windows
//
// Copyright (C) Microsoft Corporation, 2000
//
// File: mmcprotocol.h
//
// Purpose: Creates a temporary pluggable internet protocol, mmc://
//
// History: 14-April-2000 Vivekj added
//--------------------------------------------------------------------------
#include<stdafx.h>
#include<mmcprotocol.h>
#include "tasks.h"
#include "typeinfo.h" // for COleCacheCleanupObserver
// {3C5F432A-EF40-4669-9974-9671D4FC2E12}
static const CLSID CLSID_MMCProtocol = { 0x3c5f432a, 0xef40, 0x4669, { 0x99, 0x74, 0x96, 0x71, 0xd4, 0xfc, 0x2e, 0x12 } };
static const WCHAR szMMC[] = _W(MMC_PROTOCOL_SCHEMA_NAME);
static const WCHAR szMMCC[] = _W(MMC_PROTOCOL_SCHEMA_NAME) _W(":");
static const WCHAR szPageBreak[] = _W(MMC_PAGEBREAK_RELATIVE_URL);
static const WCHAR szMMCRES[] = L"%mmcres%";
static const WCHAR chUNICODE = 0xfeff;
#ifdef DBG
CTraceTag tagProtocol(_T("MMC iNet Protocol"), _T("MMCProtocol"));
#endif //DBG
/***************************************************************************\
*
* FUNCTION: HasSchema
*
* PURPOSE: helper: determines if URL contains schema (like "something:" or "http:" )
*
* PARAMETERS:
* LPCWSTR strURL
*
* RETURNS:
* bool ; true == does contain schema
*
\***************************************************************************/
inline bool HasSchema(LPCWSTR strURL)
{
if (strURL == NULL)
return false;
// skip spaces and schema name
while ( iswspace(*strURL) || iswalnum(*strURL) )
strURL++;
// valid schema ends with ':'
return *strURL == L':';
}
/***************************************************************************\
*
* FUNCTION: HasMMCSchema
*
* PURPOSE: helper: determines if URL contains mmc schema ( begins with "mmc:" )
*
* PARAMETERS:
* LPCWSTR strURL
*
* RETURNS:
* bool ; true == does contain mmc schema
*
\***************************************************************************/
inline bool HasMMCSchema(LPCWSTR strURL)
{
if (strURL == NULL)
return false;
// skip spaces
while ( iswspace(*strURL) )
strURL++;
return (0 == _wcsnicmp( strURL, szMMCC, wcslen(szMMCC) ) );
}
/***************************************************************************\
*
* CLASS: CMMCProtocolRegistrar
*
* PURPOSE: register/ unregisters mmc protocol.
* Also class provides cleanup functionality. Because it registers as
* COleCacheCleanupObserver, it will receive the event when MMC
* is about to uninitialize OLE, and will revoke registered mmc protocol
*
\***************************************************************************/
class CMMCProtocolRegistrar : public COleCacheCleanupObserver
{
bool m_bRegistered;
IClassFactoryPtr m_spClassFactory;
public:
// c-tor.
CMMCProtocolRegistrar() : m_bRegistered(false) {}
// registration / unregistration
SC ScRegister();
SC ScUnregister();
// event sensor - unregisters mmc protocol
virtual SC ScOnReleaseCachedOleObjects()
{
DECLARE_SC(sc, TEXT("ScOnReleaseCachedOleObjects"));
return sc = ScUnregister();
}
};
/***************************************************************************\
*
* METHOD: CMMCProtocolRegistrar::ScRegister
*
* PURPOSE: registers the protocol if required
*
* PARAMETERS:
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
SC CMMCProtocolRegistrar::ScRegister()
{
DECLARE_SC(sc, TEXT("CMMCProtocolRegistrar::ScRegister"));
// one time registration only
if(m_bRegistered)
return sc;
// get internet session
IInternetSessionPtr spInternetSession;
sc = CoInternetGetSession(0, &spInternetSession, 0);
if(sc)
return sc;
// doublecheck
sc = ScCheckPointers(spInternetSession, E_FAIL);
if(sc)
return sc;
// ask CComModule for the class factory
sc = _Module.GetClassObject(CLSID_MMCProtocol, IID_IClassFactory, (void **)&m_spClassFactory);
if(sc)
return sc;
// register the namespace
sc = spInternetSession->RegisterNameSpace(m_spClassFactory, CLSID_MMCProtocol, szMMC, 0, NULL, 0);
if(sc)
return sc;
// start observing cleanup requests - to unregister in time
COleCacheCleanupManager::AddOleObserver(this);
m_bRegistered = true; // did it.
return sc;
}
/***************************************************************************\
*
* METHOD: CMMCProtocolRegistrar::ScUnregister
*
* PURPOSE: unregisters the protocol if one was registered
*
* PARAMETERS:
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
SC CMMCProtocolRegistrar::ScUnregister()
{
DECLARE_SC(sc, TEXT("CMMCProtocolRegistrar::ScUnregister"));
if (!m_bRegistered)
return sc;
// unregister
IInternetSessionPtr spInternetSession;
sc = CoInternetGetSession(0, &spInternetSession, 0);
if(sc)
{
sc.Clear(); // no session - no headache
}
else // need to unregister
{
// recheck
sc = ScCheckPointers(spInternetSession, E_UNEXPECTED);
if(sc)
return sc;
// unregister the namespace
sc = spInternetSession->UnregisterNameSpace(m_spClassFactory, szMMC);
if(sc)
return sc;
}
m_spClassFactory.Release();
m_bRegistered = false;
return sc;
}
/***************************************************************************\
*
* METHOD: CMMCProtocol::ScRegisterProtocol
*
* PURPOSE: Registers mmc protocol. IE will resove "mmc:..." ULRs to it
*
* PARAMETERS:
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
SC
CMMCProtocol::ScRegisterProtocol()
{
DECLARE_SC(sc, TEXT("CMMCProtocol::ScRegisterProtocol"));
// registrar (unregisters on cleanup event) - needs to be static
static CMMCProtocolRegistrar registrar;
// let the registrar do the job
return sc = registrar.ScRegister();
}
//*****************************************************************************
// IInternetProtocolRoot interface
//*****************************************************************************
/***************************************************************************\
*
* METHOD: CMMCProtocol::Start
*
* PURPOSE: Starts data download thru this protocol
*
* PARAMETERS:
* LPCWSTR szUrl
* IInternetProtocolSink *pOIProtSink
* IInternetBindInfo *pOIBindInfo
* DWORD grfPI
* HANDLE_PTR dwReserved
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
STDMETHODIMP
CMMCProtocol::Start(LPCWSTR szUrl, IInternetProtocolSink *pOIProtSink, IInternetBindInfo *pOIBindInfo, DWORD grfPI, HANDLE_PTR dwReserved)
{
DECLARE_SC(sc, TEXT("CMMCProtocol::Start"));
// check inputs
sc = ScCheckPointers(szUrl, pOIProtSink, pOIBindInfo);
if(sc)
return sc.ToHr();
// reset position for reading
m_uiReadOffs = 0;
bool bPageBreakRequest = false;
// see if it was a pagebreak requested
sc = ScParsePageBreakURL( szUrl, bPageBreakRequest );
if(sc)
return sc.ToHr();
if ( bPageBreakRequest )
{
// just report success (S_OK/S_FALSE) in case we were just parsing
if ( grfPI & PI_PARSE_URL )
return sc.ToHr();
// construct a pagebreak
m_strData = L"<HTML/>";
sc = pOIProtSink->ReportProgress(BINDSTATUS_VERIFIEDMIMETYPEAVAILABLE, L"text/html");
if (sc)
sc.TraceAndClear(); // ignore and continue
}
else
{
//if not a pagebreak - then taskpad
GUID guidTaskpad = GUID_NULL;
sc = ScParseTaskpadURL( szUrl, guidTaskpad );
if(sc)
return sc.ToHr();
// report the S_FALSE instead of error in case we were just parsing
if ( grfPI & PI_PARSE_URL )
return ( sc.IsError() ? (sc = S_FALSE) : sc ).ToHr();
if (sc)
return sc.ToHr();
// load the contents
sc = ScGetTaskpadXML( guidTaskpad, m_strData );
if (sc)
return sc.ToHr();
sc = pOIProtSink->ReportProgress(BINDSTATUS_VERIFIEDMIMETYPEAVAILABLE, L"text/html");
if (sc)
sc.TraceAndClear(); // ignore and continue
}
const DWORD grfBSCF = BSCF_LASTDATANOTIFICATION | BSCF_DATAFULLYAVAILABLE;
const DWORD dwDataSize = m_strData.length() * sizeof (WCHAR);
sc = pOIProtSink->ReportData(grfBSCF, dwDataSize , dwDataSize);
if (sc)
sc.TraceAndClear(); // ignore and continue
sc = pOIProtSink->ReportResult(0, 0, 0);
if (sc)
sc.TraceAndClear(); // ignore and continue
return sc.ToHr();
}
STDMETHODIMP CMMCProtocol::Continue(PROTOCOLDATA *pProtocolData) { return E_NOTIMPL; }
STDMETHODIMP CMMCProtocol::Abort(HRESULT hrReason, DWORD dwOptions) { return S_OK; }
STDMETHODIMP CMMCProtocol::Terminate(DWORD dwOptions) { return S_OK; }
STDMETHODIMP CMMCProtocol::LockRequest(DWORD dwOptions) { return S_OK; }
STDMETHODIMP CMMCProtocol::UnlockRequest() { return S_OK; }
STDMETHODIMP CMMCProtocol::Suspend() { return E_NOTIMPL; }
STDMETHODIMP CMMCProtocol::Resume() { return E_NOTIMPL; }
STDMETHODIMP CMMCProtocol::Seek(LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition)
{
return E_NOTIMPL;
}
//*****************************************************************************
// IInternetProtocol interface
//*****************************************************************************
/***************************************************************************\
*
* METHOD: CMMCProtocol::Read
*
* PURPOSE: Reads data from the protocol
*
* PARAMETERS:
* void *pv
* ULONG cb
* ULONG *pcbRead
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
STDMETHODIMP CMMCProtocol::Read(void *pv, ULONG cb, ULONG *pcbRead)
{
DECLARE_SC(sc, TEXT("CMMCProtocol::Read"));
// parameter check;
sc = ScCheckPointers(pv, pcbRead);
if(sc)
return sc.ToHr();
// init out parameter;
*pcbRead = 0;
size_t size = ( m_strData.length() ) * sizeof(WCHAR);
if ( size <= m_uiReadOffs )
return (sc = S_FALSE).ToHr(); // no more data
// calculate the size we'll return
*pcbRead = size - m_uiReadOffs;
if (size - m_uiReadOffs > cb)
*pcbRead = cb;
if (*pcbRead)
memcpy( pv, reinterpret_cast<const BYTE*>( m_strData.begin() ) + m_uiReadOffs, *pcbRead );
m_uiReadOffs += *pcbRead;
if ( size <= m_uiReadOffs )
return (sc = S_FALSE).ToHr(); // no more data
return sc.ToHr();
}
//*****************************************************************************
// IInternetProtocolInfo interface
//*****************************************************************************
STDMETHODIMP
CMMCProtocol::ParseUrl( LPCWSTR pwzUrl, PARSEACTION ParseAction, DWORD dwParseFlags, LPWSTR pwzResult, DWORD cchResult, DWORD *pcchResult, DWORD dwReserved)
{
DECLARE_SC(sc, TEXT("CMMCProtocol::ParseUrl"));
if (ParseAction == PARSE_SECURITY_URL)
{
// get system directory (like "c:\winnt\system32\")
std::wstring windir;
AppendMMCPath(windir);
windir += L'\\';
// we are as secure as windir is - report the url (like "c:\winnt\system32\")
*pcchResult = windir.length() + 1;
// check if we have enough place for the result and terminating zero
if ( cchResult <= windir.length() )
return S_FALSE; // not enough
sc = StringCchCopyW(pwzResult,cchResult, windir.c_str());
if(sc)
return sc.ToHr();
return (sc = S_OK).ToHr();
}
return INET_E_DEFAULT_ACTION;
}
/***************************************************************************\
*
* METHOD: CMMCProtocol::CombineUrl
*
* PURPOSE: combines base + relative url to resulting url
* we do local variable substitution here
*
* PARAMETERS:
* LPCWSTR pwzBaseUrl
* LPCWSTR pwzRelativeUrl
* DWORD dwCombineFlags
* LPWSTR pwzResult
* DWORD cchResult
* DWORD *pcchResult
* DWORD dwReserved
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
STDMETHODIMP CMMCProtocol::CombineUrl(LPCWSTR pwzBaseUrl, LPCWSTR pwzRelativeUrl, DWORD dwCombineFlags, LPWSTR pwzResult, DWORD cchResult, DWORD *pcchResult, DWORD dwReserved)
{
DECLARE_SC(sc, TEXT("CMMCProtocol::CombineUrl"));
#ifdef DBG
USES_CONVERSION;
Trace(tagProtocol, _T("CombineUrl: [%s] + [%s]"), W2CT(pwzBaseUrl), W2CT(pwzRelativeUrl));
#endif //DBG
std::wstring temp1;
if (HasMMCSchema(pwzBaseUrl))
{
// our stuff
temp1 = pwzRelativeUrl;
ExpandMMCVars(temp1);
if ( ! HasSchema( temp1.c_str() ) )
{
// combine everything into relative URL
temp1.insert( 0, pwzBaseUrl );
}
// form 'new' relative address
pwzRelativeUrl = temp1.c_str();
// say we are refered from http - let it do the dirty job ;)
pwzBaseUrl = L"http://";
}
// since we stripped out ourselfs from pwzBaseUrl - it will not recurse back,
// but will do original html stuff
sc = CoInternetCombineUrl( pwzBaseUrl, pwzRelativeUrl, dwCombineFlags, pwzResult, cchResult, pcchResult, dwReserved );
if (sc)
return sc.ToHr();
Trace(tagProtocol, _T("CombineUrl: == [%s]"), W2CT(pwzResult));
return sc.ToHr();
}
/***************************************************************************\
*
* METHOD: CMMCProtocol::CompareUrl
*
* PURPOSE: compares URLs if they are the same
*
* PARAMETERS:
* LPCWSTR pwzUrl1
* LPCWSTR pwzUrl2
* DWORD dwCompareFlags
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
STDMETHODIMP CMMCProtocol::CompareUrl(LPCWSTR pwzUrl1, LPCWSTR pwzUrl2,DWORD dwCompareFlags)
{
DECLARE_SC(sc, TEXT("CMMCProtocol::CompareUrl"));
return INET_E_DEFAULT_ACTION;
}
/***************************************************************************\
*
* METHOD: CMMCProtocol::QueryInfo
*
* PURPOSE: Queries info about URL
*
* PARAMETERS:
* LPCWSTR pwzUrl
* QUERYOPTION QueryOption
* DWORD dwQueryFlags
* LPVOID pBuffer
* DWORD cbBuffer
* DWORD *pcbBuf
* DWORD dwReserved
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
STDMETHODIMP CMMCProtocol::QueryInfo( LPCWSTR pwzUrl, QUERYOPTION QueryOption,DWORD dwQueryFlags, LPVOID pBuffer, DWORD cbBuffer, DWORD *pcbBuf, DWORD dwReserved)
{
DECLARE_SC(sc, TEXT("CMMCProtocol::QueryInfo"));
if (QueryOption == QUERY_USES_NETWORK)
{
if (cbBuffer >= 4)
{
*(LPDWORD)pBuffer = FALSE; // does not use the network
*pcbBuf = 4;
return S_OK;
}
}
else if (QueryOption == QUERY_IS_SAFE)
{
if (cbBuffer >= 4)
{
*(LPDWORD)pBuffer = TRUE; // only serves trusted content
*pcbBuf = 4;
return S_OK;
}
}
return INET_E_DEFAULT_ACTION;
}
/***************************************************************************\
*
* METHOD: CMMCProtocol::ScParseTaskpadURL
*
* PURPOSE: Extracts taskpad guid from URL given to the protocol
*
* PARAMETERS:
* LPCWSTR strURL [in] - URL
* GUID& guid [out] - extracted guid
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
SC CMMCProtocol::ScParseTaskpadURL( LPCWSTR strURL, GUID& guid )
{
DECLARE_SC(sc, TEXT("CMMCProtocol::ScParseTaskpadURL"));
guid = GUID_NULL;
sc = ScCheckPointers(strURL);
if (sc)
return sc;
// taskpad url should be in form "mmc:{guid}"
// check for "mmc:"
if ( 0 != _wcsnicmp( strURL, szMMCC, wcslen(szMMCC) ) )
return sc = E_FAIL;
// skip "mmc:"
strURL += wcslen(szMMCC);
// get the url
sc = CLSIDFromString( const_cast<LPWSTR>(strURL), &guid );
if (sc)
return sc;
return sc;
}
/***************************************************************************\
*
* METHOD: CMMCProtocol::ScParsePageBreakURL
*
* PURPOSE: Checks if URL given to the protocol is a request for a pagebreak
*
* PARAMETERS:
* LPCWSTR strURL [in] - URL
* bool& bPageBreak [out] - true it it is a request for pagebreak
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
SC CMMCProtocol::ScParsePageBreakURL( LPCWSTR strURL, bool& bPageBreak )
{
DECLARE_SC(sc, TEXT("CMMCProtocol::ScParsePageBreakURL"));
bPageBreak = false;
sc = ScCheckPointers(strURL);
if (sc)
return sc;
// pagebreak url should be in form "mmc:pagebreak.<number>"
// check for "mmc:"
if ( 0 != _wcsnicmp( strURL, szMMCC, wcslen(szMMCC) ) )
return sc; // not an error - return value updated
// skip "mmc:"
strURL += wcslen(szMMCC);
// get the url
bPageBreak = ( 0 == wcsncmp( strURL, szPageBreak, wcslen(szPageBreak) ) );
return sc;
}
/***************************************************************************\
*
* METHOD: CMMCProtocol::ScGetTaskpadXML
*
* PURPOSE: given the guid uploads taskpad XML string to the string
*
* PARAMETERS:
* const GUID& guid [in] - taskpad guid
* std::wstring& strResultData [out] - taskpad xml string
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
SC CMMCProtocol::ScGetTaskpadXML( const GUID& guid, std::wstring& strResultData )
{
DECLARE_SC(sc, TEXT("CMMCProtocol::ScGetTaskpadXML"));
strResultData.erase();
CScopeTree* pScopeTree = CScopeTree::GetScopeTree();
sc = ScCheckPointers(pScopeTree, E_FAIL);
if(sc)
return sc.ToHr();
CConsoleTaskpadList * pConsoleTaskpadList = pScopeTree->GetConsoleTaskpadList();
sc = ScCheckPointers(pConsoleTaskpadList, E_FAIL);
if(sc)
return sc.ToHr();
for(CConsoleTaskpadList::iterator iter = pConsoleTaskpadList->begin(); iter!= pConsoleTaskpadList->end(); ++iter)
{
CConsoleTaskpad &consoleTaskpad = *iter;
// check if this is the one we are looking for
if ( !IsEqualGUID( guid, consoleTaskpad.GetID() ) )
continue;
// convert the taskpad to a string
CStr strTaskpadHTML;
sc = consoleTaskpad.ScGetHTML(strTaskpadHTML); // create a string version of the taskpad
if(sc)
return sc.ToHr();
// form the result string
USES_CONVERSION;
strResultData = chUNICODE;
strResultData += T2CW(strTaskpadHTML);
return sc;
}
// not found
return sc = E_FAIL;
}
/***************************************************************************\
*
* METHOD: CMMCProtocol::AppendMMCPath
*
* PURPOSE: helper. Appends the mmcndmgr.dll dir (no file name) to the string
* It may append something like: "c:\winnt\system32"
*
* PARAMETERS:
* std::wstring& str [in/out] - string to edit
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
void CMMCProtocol::AppendMMCPath(std::wstring& str)
{
TCHAR szModule[_MAX_PATH+10] = { 0 };
DWORD cchSize = countof(szModule);
DWORD dwRet = GetModuleFileName(_Module.GetModuleInstance(), szModule, cchSize);
if(0==dwRet)
return;
// NTRAID#NTBUG9-613782-2002/05/02-ronmart-prefast warning 53: Call to 'GetModuleFileNameW' may not zero-terminate string
szModule[cchSize - 1] = 0;
USES_CONVERSION;
LPCWSTR strModule = T2CW(szModule);
LPCWSTR dirEnd = wcsrchr( strModule, L'\\' );
if (dirEnd != NULL)
str.append(strModule, dirEnd);
}
/***************************************************************************\
*
* METHOD: CMMCProtocol::ExpandMMCVars
*
* PURPOSE: helper. expands any %mmcres% contained in the string
* It expands it to something like "res://c:\winnt\system32\mmcndmgr.dll"
*
* PARAMETERS:
* std::wstring& str [in/out] - string to edit
*
* RETURNS:
* SC - result code
*
\***************************************************************************/
void CMMCProtocol::ExpandMMCVars(std::wstring& str)
{
TCHAR szModule[_MAX_PATH+10] = { 0 };
DWORD cchSize = countof(szModule);
DWORD dwRet = GetModuleFileName(_Module.GetModuleInstance(), szModule, cchSize);
if(0==dwRet)
return;
// NTRAID#NTBUG9-613782-2002/05/02-ronmart-prefast warning 53: Call to 'GetModuleFileNameW' may not zero-terminate string
szModule[cchSize - 1] = 0;
USES_CONVERSION;
LPCWSTR strModule = T2CW(szModule);
std::wstring mmcres = L"res://";
mmcres += strModule;
// second - replace the instances
int pos;
while (std::wstring::npos != (pos = str.find(szMMCRES) ) )
{
// make one substitution
str.replace( pos, wcslen(szMMCRES), mmcres) ;
}
}