/* $Id: ClipboardStreamImpl-win.cpp 86948 2020-11-20 18:35:24Z vboxsync $ */ /** @file * ClipboardStreamImpl-win.cpp - Shared Clipboard IStream object implementation (guest and host side). */ /* * Copyright (C) 2019-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_SHARED_CLIPBOARD #include #include #include #include #include #include #include #include /********************************************************************************************************************************* * Structures and Typedefs * *********************************************************************************************************************************/ /********************************************************************************************************************************* * Static variables * *********************************************************************************************************************************/ SharedClipboardWinStreamImpl::SharedClipboardWinStreamImpl(SharedClipboardWinDataObject *pParent, PSHCLTRANSFER pTransfer, const Utf8Str &strPath, PSHCLFSOBJINFO pObjInfo) : m_pParent(pParent) , m_lRefCount(1) /* Our IDataObjct *always* holds the last reference to this object; needed for the callbacks. */ , m_pTransfer(pTransfer) , m_hObj(SHCLOBJHANDLE_INVALID) , m_strPath(strPath) , m_objInfo(*pObjInfo) , m_cbProcessed(0) , m_fIsComplete(false) { AssertPtr(m_pTransfer); LogFunc(("m_strPath=%s\n", m_strPath.c_str())); } SharedClipboardWinStreamImpl::~SharedClipboardWinStreamImpl(void) { LogFlowThisFuncEnter(); } /* * IUnknown methods. */ STDMETHODIMP SharedClipboardWinStreamImpl::QueryInterface(REFIID iid, void **ppvObject) { AssertPtrReturn(ppvObject, E_INVALIDARG); if (iid == IID_IUnknown) { LogFlowFunc(("IID_IUnknown\n")); *ppvObject = (IUnknown *)(ISequentialStream *)this; } else if (iid == IID_ISequentialStream) { LogFlowFunc(("IID_ISequentialStream\n")); *ppvObject = (ISequentialStream *)this; } else if (iid == IID_IStream) { LogFlowFunc(("IID_IStream\n")); *ppvObject = (IStream *)this; } else { *ppvObject = NULL; return E_NOINTERFACE; } AddRef(); return S_OK; } STDMETHODIMP_(ULONG) SharedClipboardWinStreamImpl::AddRef(void) { LONG lCount = InterlockedIncrement(&m_lRefCount); LogFlowFunc(("lCount=%RI32\n", lCount)); return lCount; } STDMETHODIMP_(ULONG) SharedClipboardWinStreamImpl::Release(void) { LONG lCount = InterlockedDecrement(&m_lRefCount); LogFlowFunc(("lCount=%RI32\n", m_lRefCount)); if (lCount == 0) { delete this; return 0; } return lCount; } /* * IStream methods. */ STDMETHODIMP SharedClipboardWinStreamImpl::Clone(IStream** ppStream) { RT_NOREF(ppStream); LogFlowFuncEnter(); return E_NOTIMPL; } STDMETHODIMP SharedClipboardWinStreamImpl::Commit(DWORD dwFrags) { RT_NOREF(dwFrags); LogFlowThisFuncEnter(); return E_NOTIMPL; } STDMETHODIMP SharedClipboardWinStreamImpl::CopyTo(IStream *pDestStream, ULARGE_INTEGER nBytesToCopy, ULARGE_INTEGER *nBytesRead, ULARGE_INTEGER *nBytesWritten) { RT_NOREF(pDestStream, nBytesToCopy, nBytesRead, nBytesWritten); LogFlowThisFuncEnter(); return E_NOTIMPL; } STDMETHODIMP SharedClipboardWinStreamImpl::LockRegion(ULARGE_INTEGER nStart, ULARGE_INTEGER nBytes,DWORD dwFlags) { RT_NOREF(nStart, nBytes, dwFlags); LogFlowThisFuncEnter(); return STG_E_INVALIDFUNCTION; } /* Note: Windows seems to assume EOF if nBytesRead < nBytesToRead. */ STDMETHODIMP SharedClipboardWinStreamImpl::Read(void *pvBuffer, ULONG nBytesToRead, ULONG *nBytesRead) { LogFlowThisFunc(("Enter: m_cbProcessed=%RU64\n", m_cbProcessed)); /** @todo Is there any locking required so that parallel reads aren't possible? */ if (!pvBuffer) return STG_E_INVALIDPOINTER; if ( nBytesToRead == 0 || m_fIsComplete) { if (nBytesRead) *nBytesRead = 0; return S_OK; } int rc; try { if ( m_hObj == SHCLOBJHANDLE_INVALID && m_pTransfer->ProviderIface.pfnObjOpen) { SHCLOBJOPENCREATEPARMS openParms; rc = ShClTransferObjOpenParmsInit(&openParms); if (RT_SUCCESS(rc)) { openParms.fCreate = SHCL_OBJ_CF_ACCESS_READ | SHCL_OBJ_CF_ACCESS_DENYWRITE; rc = RTStrCopy(openParms.pszPath, openParms.cbPath, m_strPath.c_str()); if (RT_SUCCESS(rc)) { rc = m_pTransfer->ProviderIface.pfnObjOpen(&m_pTransfer->ProviderCtx, &openParms, &m_hObj); } ShClTransferObjOpenParmsDestroy(&openParms); } } else rc = VINF_SUCCESS; uint32_t cbRead = 0; const uint64_t cbSize = (uint64_t)m_objInfo.cbObject; const uint32_t cbToRead = RT_MIN(cbSize - m_cbProcessed, nBytesToRead); if (RT_SUCCESS(rc)) { if (cbToRead) { rc = m_pTransfer->ProviderIface.pfnObjRead(&m_pTransfer->ProviderCtx, m_hObj, pvBuffer, cbToRead, 0 /* fFlags */, &cbRead); if (RT_SUCCESS(rc)) { m_cbProcessed += cbRead; Assert(m_cbProcessed <= cbSize); } } /* Transfer complete? Make sure to close the object again. */ m_fIsComplete = m_cbProcessed == cbSize; if (m_fIsComplete) { if (m_pTransfer->ProviderIface.pfnObjClose) { int rc2 = m_pTransfer->ProviderIface.pfnObjClose(&m_pTransfer->ProviderCtx, m_hObj); AssertRC(rc2); } if (m_pParent) m_pParent->OnTransferComplete(); } } LogFlowThisFunc(("Leave: rc=%Rrc, cbSize=%RU64, cbProcessed=%RU64 -> nBytesToRead=%RU32, cbToRead=%RU32, cbRead=%RU32\n", rc, cbSize, m_cbProcessed, nBytesToRead, cbToRead, cbRead)); if (nBytesRead) *nBytesRead = (ULONG)cbRead; if (nBytesToRead != cbRead) return S_FALSE; return S_OK; } catch (...) { LogFunc(("Caught exception\n")); } return E_FAIL; } STDMETHODIMP SharedClipboardWinStreamImpl::Revert(void) { LogFlowThisFuncEnter(); return E_NOTIMPL; } STDMETHODIMP SharedClipboardWinStreamImpl::Seek(LARGE_INTEGER nMove, DWORD dwOrigin, ULARGE_INTEGER* nNewPos) { RT_NOREF(nMove, dwOrigin, nNewPos); LogFlowThisFunc(("nMove=%RI64, dwOrigin=%RI32\n", nMove, dwOrigin)); return E_NOTIMPL; } STDMETHODIMP SharedClipboardWinStreamImpl::SetSize(ULARGE_INTEGER nNewSize) { RT_NOREF(nNewSize); LogFlowThisFuncEnter(); return E_NOTIMPL; } STDMETHODIMP SharedClipboardWinStreamImpl::Stat(STATSTG *pStatStg, DWORD dwFlags) { HRESULT hr = S_OK; if (pStatStg) { RT_ZERO(*pStatStg); switch (dwFlags) { case STATFLAG_NONAME: pStatStg->pwcsName = NULL; break; case STATFLAG_DEFAULT: { /** @todo r=bird: This is using the wrong allocator. According to MSDN the * caller will pass this to CoTaskMemFree, so we should use CoTaskMemAlloc to * allocate it. */ int rc2 = RTStrToUtf16(m_strPath.c_str(), &pStatStg->pwcsName); if (RT_FAILURE(rc2)) hr = E_FAIL; break; } default: hr = STG_E_INVALIDFLAG; break; } if (SUCCEEDED(hr)) { pStatStg->type = STGTY_STREAM; pStatStg->grfMode = STGM_READ; pStatStg->grfLocksSupported = 0; pStatStg->cbSize.QuadPart = (uint64_t)m_objInfo.cbObject; } } else hr = STG_E_INVALIDPOINTER; LogFlowThisFunc(("hr=%Rhrc\n", hr)); return hr; } STDMETHODIMP SharedClipboardWinStreamImpl::UnlockRegion(ULARGE_INTEGER nStart, ULARGE_INTEGER nBytes, DWORD dwFlags) { RT_NOREF(nStart, nBytes, dwFlags); LogFlowThisFuncEnter(); return E_NOTIMPL; } STDMETHODIMP SharedClipboardWinStreamImpl::Write(const void *pvBuffer, ULONG nBytesToRead, ULONG *nBytesRead) { RT_NOREF(pvBuffer, nBytesToRead, nBytesRead); LogFlowThisFuncEnter(); return E_NOTIMPL; } /* * Own stuff. */ /** * Factory to create our own IStream implementation. * * @returns HRESULT * @param pParent Pointer to the parent data object. * @param pTransfer Pointer to Shared Clipboard transfer object to use. * @param strPath Path of object to handle for the stream. * @param pObjInfo Pointer to object information. * @param ppStream Where to return the created stream object on success. */ /* static */ HRESULT SharedClipboardWinStreamImpl::Create(SharedClipboardWinDataObject *pParent, PSHCLTRANSFER pTransfer, const Utf8Str &strPath, PSHCLFSOBJINFO pObjInfo, IStream **ppStream) { AssertPtrReturn(pTransfer, E_POINTER); SharedClipboardWinStreamImpl *pStream = new SharedClipboardWinStreamImpl(pParent, pTransfer, strPath, pObjInfo); if (pStream) { pStream->AddRef(); *ppStream = pStream; return S_OK; } return E_FAIL; }