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|
/* $Id: VBoxDragAndDropSvc.cpp $ */
/** @file
* Drag and Drop Service.
*/
/*
* Copyright (C) 2011-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/** @page pg_svc_dnd Drag and drop HGCM Service
*
* @sa See src/VBox/Main/src-client/GuestDnDPrivate.cpp for more information.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_GUEST_DND
#include <VBox/GuestHost/DragAndDrop.h>
#include <VBox/GuestHost/DragAndDropDefs.h>
#include <VBox/HostServices/Service.h>
#include <VBox/HostServices/DragAndDropSvc.h>
#include <VBox/AssertGuest.h>
#include <VBox/err.h>
#include <algorithm>
#include <list>
#include <map>
#include "dndmanager.h"
using namespace DragAndDropSvc;
/*********************************************************************************************************************************
* Service class declaration *
*********************************************************************************************************************************/
class DragAndDropClient : public HGCM::Client
{
public:
DragAndDropClient(uint32_t idClient)
: HGCM::Client(idClient)
, uProtocolVerDeprecated(0)
, fGuestFeatures0(VBOX_DND_GF_NONE)
, fGuestFeatures1(VBOX_DND_GF_NONE)
{
RT_ZERO(m_SvcCtx);
}
virtual ~DragAndDropClient(void)
{
disconnect();
}
public:
void disconnect(void) RT_NOEXCEPT;
public:
/** Protocol version used by this client.
* Deprecated; only used for keeping backwards compatibility. */
uint32_t uProtocolVerDeprecated;
/** Guest feature flags, VBOX_DND_GF_0_XXX. */
uint64_t fGuestFeatures0;
/** Guest feature flags, VBOX_DND_GF_1_XXX. */
uint64_t fGuestFeatures1;
};
/** Map holding pointers to drag and drop clients. Key is the (unique) HGCM client ID. */
typedef std::map<uint32_t, DragAndDropClient*> DnDClientMap;
/** Simple queue (list) which holds deferred (waiting) clients. */
typedef std::list<uint32_t> DnDClientQueue;
/**
* Specialized drag & drop service class.
*/
class DragAndDropService : public HGCM::AbstractService<DragAndDropService>
{
public:
explicit DragAndDropService(PVBOXHGCMSVCHELPERS pHelpers)
: HGCM::AbstractService<DragAndDropService>(pHelpers)
, m_pManager(NULL)
, m_u32Mode(VBOX_DRAG_AND_DROP_MODE_OFF)
{}
protected:
int init(VBOXHGCMSVCFNTABLE *pTable) RT_NOEXCEPT RT_OVERRIDE;
int uninit(void) RT_NOEXCEPT RT_OVERRIDE;
int clientConnect(uint32_t idClient, void *pvClient) RT_NOEXCEPT RT_OVERRIDE;
int clientDisconnect(uint32_t idClient, void *pvClient) RT_NOEXCEPT RT_OVERRIDE;
int clientQueryFeatures(uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT;
int clientReportFeatures(DragAndDropClient *pClient, uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT;
void guestCall(VBOXHGCMCALLHANDLE callHandle, uint32_t idClient, void *pvClient, uint32_t u32Function,
uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT RT_OVERRIDE;
int hostCall(uint32_t u32Function, uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT RT_OVERRIDE;
private:
int modeSet(uint32_t u32Mode) RT_NOEXCEPT;
inline uint32_t modeGet(void) const RT_NOEXCEPT
{ return m_u32Mode; };
static DECLCALLBACK(int) progressCallback(uint32_t uStatus, uint32_t uPercentage, int rc, void *pvUser);
private:
/** Pointer to our DnD manager instance. */
DnDManager *m_pManager;
/** Map of all connected clients.
* The primary key is the (unique) client ID, the secondary value
* an allocated pointer to the DragAndDropClient class, managed
* by this service class. */
DnDClientMap m_clientMap;
/** List of all clients which are queued up (deferred return) and ready
* to process new commands. The key is the (unique) client ID. */
DnDClientQueue m_clientQueue;
/** Current drag and drop mode, VBOX_DRAG_AND_DROP_MODE_XXX. */
uint32_t m_u32Mode;
/** Host feature mask (VBOX_DND_HF_0_XXX) for DND_GUEST_REPORT_FEATURES
* and DND_GUEST_QUERY_FEATURES. */
uint64_t m_fHostFeatures0;
};
/*********************************************************************************************************************************
* Client implementation *
*********************************************************************************************************************************/
/**
* Called when the HGCM client disconnected on the guest side.
*
* This function takes care of the client's data cleanup and also lets the host
* know that the client has been disconnected.
*/
void DragAndDropClient::disconnect(void) RT_NOEXCEPT
{
LogFlowThisFunc(("uClient=%RU32, fDeferred=%RTbool\n", m_idClient, IsDeferred()));
/*
* If the client still is waiting for a message (i.e in deferred mode),
* complete the call with a VERR_CANCELED status so that the client (VBoxTray / VBoxClient) knows
* it should bail out.
*/
if (IsDeferred())
CompleteDeferred(VERR_CANCELLED);
/*
* Let the host know.
*/
VBOXDNDCBDISCONNECTMSGDATA data;
RT_ZERO(data);
/** @todo Magic needed? */
/** @todo Add context ID. */
if (m_SvcCtx.pfnHostCallback)
{
int rc2 = m_SvcCtx.pfnHostCallback(m_SvcCtx.pvHostData, GUEST_DND_FN_DISCONNECT, &data, sizeof(data));
if (RT_FAILURE(rc2))
LogFlowFunc(("Warning: Unable to notify host about client %RU32 disconnect, rc=%Rrc\n", m_idClient, rc2));
/* Not fatal. */
}
}
/*********************************************************************************************************************************
* Service class implementation *
*********************************************************************************************************************************/
int DragAndDropService::init(VBOXHGCMSVCFNTABLE *pTable) RT_NOEXCEPT
{
/* Legacy clients map to the root category. */
pTable->idxLegacyClientCategory = HGCM_CLIENT_CATEGORY_ROOT;
/* Limit to 255 clients (see also DragAndDropService::clientConnect). */
for (uintptr_t i = 0; i < RT_ELEMENTS(pTable->acMaxClients); i++)
pTable->acMaxClients[i] = UINT8_MAX;
/* Limit the number of concurrent calls to 256 (playing safe). */
/** @todo Properly determin the max number of pending/concurrent calls for DnD. */
for (uintptr_t i = 0; i < RT_ELEMENTS(pTable->acMaxClients); i++)
pTable->acMaxCallsPerClient[i] = 256;
/* Register functions. */
pTable->pfnHostCall = svcHostCall;
pTable->pfnSaveState = NULL; /* The service is stateless, so the normal */
pTable->pfnLoadState = NULL; /* construction done before restoring suffices */
pTable->pfnRegisterExtension = svcRegisterExtension;
pTable->pfnNotify = NULL;
/* Drag'n drop mode is disabled by default. */
modeSet(VBOX_DRAG_AND_DROP_MODE_OFF);
/* Set host features. */
m_fHostFeatures0 = VBOX_DND_HF_NONE;
int rc = VINF_SUCCESS;
try
{
m_pManager = new DnDManager(&DragAndDropService::progressCallback, this);
}
catch (std::bad_alloc &)
{
rc = VERR_NO_MEMORY;
}
LogFlowFuncLeaveRC(rc);
return rc;
}
int DragAndDropService::uninit(void) RT_NOEXCEPT
{
LogFlowFuncEnter();
if (m_pManager)
{
delete m_pManager;
m_pManager = NULL;
}
DnDClientMap::iterator itClient = m_clientMap.begin();
while (itClient != m_clientMap.end())
{
delete itClient->second;
m_clientMap.erase(itClient);
itClient = m_clientMap.begin();
}
LogFlowFuncLeave();
return VINF_SUCCESS;
}
int DragAndDropService::clientConnect(uint32_t idClient, void *pvClient) RT_NOEXCEPT
{
RT_NOREF1(pvClient);
if (m_clientMap.size() >= UINT8_MAX) /* Don't allow too much clients at the same time. */
{
AssertMsgFailed(("Maximum number of clients reached\n"));
return VERR_MAX_PROCS_REACHED;
}
/*
* Add client to our client map.
*/
if (m_clientMap.find(idClient) != m_clientMap.end())
{
LogFunc(("Client %RU32 is already connected!\n", idClient));
return VERR_ALREADY_EXISTS;
}
try
{
DragAndDropClient *pClient = new DragAndDropClient(idClient);
pClient->SetSvcContext(m_SvcCtx);
m_clientMap[idClient] = pClient;
}
catch (std::bad_alloc &)
{
LogFunc(("Client %RU32 - VERR_NO_MEMORY!\n", idClient));
return VERR_NO_MEMORY;
}
LogFlowFunc(("Client %RU32 connected (VINF_SUCCESS)\n", idClient));
return VINF_SUCCESS;
}
int DragAndDropService::clientDisconnect(uint32_t idClient, void *pvClient) RT_NOEXCEPT
{
RT_NOREF1(pvClient);
/* Client not found? Bail out early. */
DnDClientMap::iterator itClient = m_clientMap.find(idClient);
if (itClient == m_clientMap.end())
{
LogFunc(("Client %RU32 not found!\n", idClient));
return VERR_NOT_FOUND;
}
/*
* Remove from waiters queue.
*/
m_clientQueue.remove(idClient);
/*
* Remove from client map and deallocate.
*/
AssertPtr(itClient->second);
delete itClient->second;
m_clientMap.erase(itClient);
LogFlowFunc(("Client %RU32 disconnected\n", idClient));
return VINF_SUCCESS;
}
/**
* Implements GUEST_DND_FN_REPORT_FEATURES.
*
* @returns VBox status code.
* @retval VINF_HGCM_ASYNC_EXECUTE on success (we complete the message here).
* @retval VERR_ACCESS_DENIED if not master
* @retval VERR_INVALID_PARAMETER if bit 63 in the 2nd parameter isn't set.
* @retval VERR_WRONG_PARAMETER_COUNT
*
* @param pClient The client state.
* @param cParms Number of parameters.
* @param paParms Array of parameters.
*/
int DragAndDropService::clientReportFeatures(DragAndDropClient *pClient, uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT
{
RT_NOREF(pClient);
/*
* Validate the request.
*/
ASSERT_GUEST_RETURN(cParms == 2, VERR_WRONG_PARAMETER_COUNT);
ASSERT_GUEST_RETURN(paParms[0].type == VBOX_HGCM_SVC_PARM_64BIT, VERR_WRONG_PARAMETER_TYPE);
uint64_t const fFeatures0 = paParms[0].u.uint64;
ASSERT_GUEST_RETURN(paParms[1].type == VBOX_HGCM_SVC_PARM_64BIT, VERR_WRONG_PARAMETER_TYPE);
uint64_t const fFeatures1 = paParms[1].u.uint64;
ASSERT_GUEST_RETURN(fFeatures1 & VBOX_DND_GF_1_MUST_BE_ONE, VERR_INVALID_PARAMETER);
/*
* Report back the host features.
*/
paParms[0].u.uint64 = m_fHostFeatures0;
paParms[1].u.uint64 = 0;
pClient->fGuestFeatures0 = fFeatures0;
pClient->fGuestFeatures1 = fFeatures1;
Log(("[Client %RU32] features: %#RX64 %#RX64\n", pClient->GetClientID(), fFeatures0, fFeatures1));
return VINF_SUCCESS;
}
/**
* Implements GUEST_DND_FN_QUERY_FEATURES.
*
* @returns VBox status code.
* @retval VINF_HGCM_ASYNC_EXECUTE on success (we complete the message here).
* @retval VERR_WRONG_PARAMETER_COUNT
*
* @param cParms Number of parameters.
* @param paParms Array of parameters.
*/
int DragAndDropService::clientQueryFeatures(uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT
{
/*
* Validate the request.
*/
ASSERT_GUEST_RETURN(cParms == 2, VERR_WRONG_PARAMETER_COUNT);
ASSERT_GUEST_RETURN(paParms[0].type == VBOX_HGCM_SVC_PARM_64BIT, VERR_WRONG_PARAMETER_TYPE);
ASSERT_GUEST_RETURN(paParms[1].type == VBOX_HGCM_SVC_PARM_64BIT, VERR_WRONG_PARAMETER_TYPE);
ASSERT_GUEST(paParms[1].u.uint64 & RT_BIT_64(63));
/*
* Report back the host features.
*/
paParms[0].u.uint64 = m_fHostFeatures0;
paParms[1].u.uint64 = 0;
return VINF_SUCCESS;
}
int DragAndDropService::modeSet(uint32_t u32Mode) RT_NOEXCEPT
{
#ifndef VBOX_WITH_DRAG_AND_DROP_GH
if ( u32Mode == VBOX_DRAG_AND_DROP_MODE_GUEST_TO_HOST
|| u32Mode == VBOX_DRAG_AND_DROP_MODE_BIDIRECTIONAL)
{
m_u32Mode = VBOX_DRAG_AND_DROP_MODE_OFF;
return VERR_NOT_SUPPORTED;
}
#endif
switch (u32Mode)
{
case VBOX_DRAG_AND_DROP_MODE_OFF:
case VBOX_DRAG_AND_DROP_MODE_HOST_TO_GUEST:
case VBOX_DRAG_AND_DROP_MODE_GUEST_TO_HOST:
case VBOX_DRAG_AND_DROP_MODE_BIDIRECTIONAL:
m_u32Mode = u32Mode;
break;
default:
m_u32Mode = VBOX_DRAG_AND_DROP_MODE_OFF;
break;
}
return VINF_SUCCESS;
}
void DragAndDropService::guestCall(VBOXHGCMCALLHANDLE callHandle, uint32_t idClient,
void *pvClient, uint32_t u32Function,
uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT
{
RT_NOREF1(pvClient);
LogFlowFunc(("idClient=%RU32, u32Function=%s (%#x), cParms=%RU32\n",
idClient, DnDGuestMsgToStr(u32Function), u32Function, cParms));
/* Check if we've the right mode set. */
int rc = VERR_ACCESS_DENIED; /* Play safe. */
switch (u32Function)
{
case GUEST_DND_FN_GET_NEXT_HOST_MSG:
{
if (modeGet() != VBOX_DRAG_AND_DROP_MODE_OFF)
rc = VINF_SUCCESS;
else
{
LogRel(("DnD: Feature is disabled, ignoring request from guest\n"));
rc = VINF_HGCM_ASYNC_EXECUTE;
}
break;
}
/* New since protocol v2. */
case GUEST_DND_FN_CONNECT:
RT_FALL_THROUGH();
/* New since VBox 6.1.x. */
case GUEST_DND_FN_REPORT_FEATURES:
RT_FALL_THROUGH();
/* New since VBox 6.1.x. */
case GUEST_DND_FN_QUERY_FEATURES:
{
/*
* Never block these calls, as the clients issues those when
* initializing and might get stuck if drag and drop is set to "disabled" at
* that time.
*/
rc = VINF_SUCCESS;
break;
}
/* New since VBOx 7.0.x. See define for details. */
case GUEST_DND_FN_EVT_ERROR:
{
rc = VINF_SUCCESS;
break;
}
case GUEST_DND_FN_HG_ACK_OP:
case GUEST_DND_FN_HG_REQ_DATA:
case GUEST_DND_FN_HG_EVT_PROGRESS:
{
if ( modeGet() == VBOX_DRAG_AND_DROP_MODE_BIDIRECTIONAL
|| modeGet() == VBOX_DRAG_AND_DROP_MODE_HOST_TO_GUEST)
rc = VINF_SUCCESS;
else
LogRel(("DnD: Host -> Guest mode disabled, ignoring request from guest\n"));
break;
}
case GUEST_DND_FN_GH_ACK_PENDING:
case GUEST_DND_FN_GH_SND_DATA_HDR:
case GUEST_DND_FN_GH_SND_DATA:
case GUEST_DND_FN_GH_SND_DIR:
case GUEST_DND_FN_GH_SND_FILE_HDR:
case GUEST_DND_FN_GH_SND_FILE_DATA:
{
#ifdef VBOX_WITH_DRAG_AND_DROP_GH
if ( modeGet() == VBOX_DRAG_AND_DROP_MODE_BIDIRECTIONAL
|| modeGet() == VBOX_DRAG_AND_DROP_MODE_GUEST_TO_HOST)
rc = VINF_SUCCESS;
else
#endif
LogRel(("DnD: Guest -> Host mode disabled, ignoring request from guest\n"));
break;
}
default:
/* Reach through to DnD manager. */
rc = VINF_SUCCESS;
break;
}
#define DO_HOST_CALLBACK(); \
if ( RT_SUCCESS(rc) \
&& m_SvcCtx.pfnHostCallback) \
{ \
rc = m_SvcCtx.pfnHostCallback(m_SvcCtx.pvHostData, u32Function, &data, sizeof(data)); \
}
/*
* Lookup client.
*/
DragAndDropClient *pClient = NULL;
DnDClientMap::iterator itClient = m_clientMap.find(idClient);
if (itClient != m_clientMap.end())
{
pClient = itClient->second;
AssertPtr(pClient);
}
else
{
LogFunc(("Client %RU32 was not found\n", idClient));
rc = VERR_NOT_FOUND;
}
/* Verifies that an uint32 parameter has the expected buffer size set.
* Will set rc to VERR_INVALID_PARAMETER otherwise. See #9777. */
#define VERIFY_BUFFER_SIZE_UINT32(a_ParmUInt32, a_SizeExpected) \
do { \
uint32_t cbTemp = 0; \
rc = HGCMSvcGetU32(&a_ParmUInt32, &cbTemp); \
ASSERT_GUEST_BREAK(RT_SUCCESS(rc) && cbTemp == a_SizeExpected); \
} while (0)
/* Gets the context ID from the first parameter and store it into the data header.
* Then increments idxParm by one if more than one parameter is available. */
#define GET_CONTEXT_ID_PARM0() \
if (fHasCtxID) \
{ \
ASSERT_GUEST_BREAK(cParms >= 1); \
rc = HGCMSvcGetU32(&paParms[0], &data.hdr.uContextID); \
ASSERT_GUEST_BREAK(RT_SUCCESS(rc)); \
if (cParms > 1) \
idxParm++; \
}
if (rc == VINF_SUCCESS) /* Note: rc might be VINF_HGCM_ASYNC_EXECUTE! */
{
rc = VERR_INVALID_PARAMETER; /* Play safe by default. */
/* Whether the client's advertised protocol sends context IDs with commands. */
const bool fHasCtxID = pClient->uProtocolVerDeprecated >= 3;
/* Current parameter index to process. */
unsigned idxParm = 0;
switch (u32Function)
{
/*
* Note: Older VBox versions with enabled DnD guest->host support (< 5.0)
* used the same message ID (300) for GUEST_DND_FN_GET_NEXT_HOST_MSG and
* HOST_DND_FN_GH_REQ_PENDING, which led this service returning
* VERR_INVALID_PARAMETER when the guest wanted to actually
* handle HOST_DND_FN_GH_REQ_PENDING.
*/
case GUEST_DND_FN_GET_NEXT_HOST_MSG:
{
if (cParms == 3)
{
/* Make sure to increase the reference count so that the next message doesn't get removed between
* the guest's GUEST_DND_FN_GET_NEXT_HOST_MSG call and the actual message retrieval call. */
rc = m_pManager->GetNextMsgInfo(true /* fAddRef */,
&paParms[0].u.uint32 /* uMsg */, &paParms[1].u.uint32 /* cParms */);
if (RT_FAILURE(rc)) /* No queued messages available? */
{
if (m_SvcCtx.pfnHostCallback) /* Try asking the host. */
{
VBOXDNDCBHGGETNEXTHOSTMSG data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_HG_GET_NEXT_HOST_MSG;
rc = m_SvcCtx.pfnHostCallback(m_SvcCtx.pvHostData, u32Function, &data, sizeof(data));
if (RT_SUCCESS(rc))
{
paParms[0].u.uint32 = data.uMsg; /* uMsg */
paParms[1].u.uint32 = data.cParms; /* cParms */
/* Note: paParms[2] was set by the guest as blocking flag. */
}
LogFlowFunc(("Host callback returned %Rrc\n", rc));
}
else /* No host callback in place, so drag and drop is not supported by the host. */
rc = VERR_NOT_SUPPORTED;
if (RT_FAILURE(rc))
rc = m_pManager->GetNextMsg(u32Function, cParms, paParms);
/* Some error occurred or no (new) messages available? */
if (RT_FAILURE(rc))
{
uint32_t fFlags = 0;
int rc2 = HGCMSvcGetU32(&paParms[2], &fFlags);
if ( RT_SUCCESS(rc2)
&& fFlags) /* Blocking flag set? */
{
/* Defer client returning. */
rc = VINF_HGCM_ASYNC_EXECUTE;
}
else
rc = VERR_INVALID_PARAMETER;
LogFlowFunc(("Message queue is empty, returning %Rrc to guest\n", rc));
}
}
}
break;
}
case GUEST_DND_FN_CONNECT:
{
ASSERT_GUEST_BREAK(cParms >= 2);
VBOXDNDCBCONNECTDATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_CONNECT;
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.hdr.uContextID); \
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uProtocolVersion);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm], &data.fFlags);
ASSERT_GUEST_RC_BREAK(rc);
unsigned uProtocolVer = 3; /* The protocol version we're going to use. */
/* Make sure we're only setting a protocl version we're supporting on the host. */
if (data.uProtocolVersion > uProtocolVer)
data.uProtocolVersion = uProtocolVer;
pClient->uProtocolVerDeprecated = data.uProtocolVersion;
/* Return the highest protocol version we're supporting. */
AssertBreak(idxParm);
ASSERT_GUEST_BREAK(idxParm);
paParms[idxParm - 1].u.uint32 = data.uProtocolVersion;
LogFlowFunc(("Client %RU32 is now using protocol v%RU32\n",
pClient->GetClientID(), pClient->uProtocolVerDeprecated));
DO_HOST_CALLBACK();
break;
}
case GUEST_DND_FN_REPORT_FEATURES:
{
rc = clientReportFeatures(pClient, cParms, paParms);
if (RT_SUCCESS(rc))
{
VBOXDNDCBREPORTFEATURESDATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_REPORT_FEATURES;
data.fGuestFeatures0 = pClient->fGuestFeatures0;
/* fGuestFeatures1 is not used yet. */
/* Don't touch initial rc. */
int rc2 = m_SvcCtx.pfnHostCallback(m_SvcCtx.pvHostData, u32Function, &data, sizeof(data));
AssertRC(rc2);
}
break;
}
case GUEST_DND_FN_QUERY_FEATURES:
{
rc = clientQueryFeatures(cParms, paParms);
break;
}
case GUEST_DND_FN_HG_ACK_OP:
{
ASSERT_GUEST_BREAK(cParms >= 2);
VBOXDNDCBHGACKOPDATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_HG_ACK_OP;
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetU32(&paParms[idxParm], &data.uAction); /* Get drop action. */
ASSERT_GUEST_RC_BREAK(rc);
DO_HOST_CALLBACK();
break;
}
case GUEST_DND_FN_HG_REQ_DATA:
{
VBOXDNDCBHGREQDATADATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_HG_REQ_DATA;
switch (pClient->uProtocolVerDeprecated)
{
case 3:
{
ASSERT_GUEST_BREAK(cParms == 3);
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetPv(&paParms[idxParm++], (void **)&data.pszFormat, &data.cbFormat);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.cbFormat);
break;
}
case 2:
RT_FALL_THROUGH();
default:
{
ASSERT_GUEST_BREAK(cParms == 1);
rc = HGCMSvcGetPv(&paParms[idxParm], (void**)&data.pszFormat, &data.cbFormat);
ASSERT_GUEST_RC_BREAK(rc);
break;
}
}
DO_HOST_CALLBACK();
break;
}
case GUEST_DND_FN_HG_EVT_PROGRESS:
{
ASSERT_GUEST_BREAK(cParms >= 3);
VBOXDNDCBHGEVTPROGRESSDATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_HG_EVT_PROGRESS;
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uStatus);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uPercentage);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm], &data.rc);
ASSERT_GUEST_RC_BREAK(rc);
DO_HOST_CALLBACK();
break;
}
#ifdef VBOX_WITH_DRAG_AND_DROP_GH
case GUEST_DND_FN_GH_ACK_PENDING:
{
VBOXDNDCBGHACKPENDINGDATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_GH_ACK_PENDING;
switch (pClient->uProtocolVerDeprecated)
{
case 3:
{
ASSERT_GUEST_BREAK(cParms == 5);
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uDefAction);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uAllActions);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pszFormat, &data.cbFormat);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.cbFormat);
break;
}
case 2:
default:
{
ASSERT_GUEST_BREAK(cParms == 3);
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uDefAction);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.uAllActions);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetPv(&paParms[idxParm], (void**)&data.pszFormat, &data.cbFormat);
ASSERT_GUEST_RC_BREAK(rc);
break;
}
}
DO_HOST_CALLBACK();
break;
}
/* New since protocol v3. */
case GUEST_DND_FN_GH_SND_DATA_HDR:
{
ASSERT_GUEST_BREAK(cParms == 12);
VBOXDNDCBSNDDATAHDRDATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_GH_SND_DATA_HDR;
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.data.uFlags);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.data.uScreenId);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU64(&paParms[idxParm++], &data.data.cbTotal);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.data.cbMeta);
ASSERT_GUEST_RC_BREAK(rc);
ASSERT_GUEST_BREAK(data.data.cbMeta <= data.data.cbTotal);
rc = HGCMSvcGetPv(&paParms[idxParm++], &data.data.pvMetaFmt, &data.data.cbMetaFmt);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.data.cbMetaFmt);
rc = HGCMSvcGetU64(&paParms[idxParm++], &data.data.cObjects);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.data.enmCompression);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm++], (uint32_t *)&data.data.enmChecksumType);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetPv(&paParms[idxParm++], &data.data.pvChecksum, &data.data.cbChecksum);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.data.cbChecksum);
DO_HOST_CALLBACK();
break;
}
case GUEST_DND_FN_GH_SND_DATA:
{
switch (pClient->uProtocolVerDeprecated)
{
case 3:
{
ASSERT_GUEST_BREAK(cParms == 5);
VBOXDNDCBSNDDATADATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_GH_SND_DATA;
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.data.u.v3.pvData, &data.data.u.v3.cbData);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.data.u.v3.cbData);
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.data.u.v3.pvChecksum, &data.data.u.v3.cbChecksum);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.data.u.v3.cbChecksum);
DO_HOST_CALLBACK();
break;
}
case 2:
RT_FALL_THROUGH();
default:
{
ASSERT_GUEST_BREAK(cParms == 2);
VBOXDNDCBSNDDATADATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_GH_SND_DATA;
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.data.u.v1.pvData, &data.data.u.v1.cbData);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm], &data.data.u.v1.cbTotalSize);
ASSERT_GUEST_RC_BREAK(rc);
DO_HOST_CALLBACK();
break;
}
}
break;
}
case GUEST_DND_FN_GH_SND_DIR:
{
ASSERT_GUEST_BREAK(cParms >= 3);
VBOXDNDCBSNDDIRDATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_GH_SND_DIR;
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pszPath, &data.cbPath);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.cbPath);
rc = HGCMSvcGetU32(&paParms[idxParm], &data.fMode);
ASSERT_GUEST_RC_BREAK(rc);
DO_HOST_CALLBACK();
break;
}
/* New since protocol v2 (>= VBox 5.0). */
case GUEST_DND_FN_GH_SND_FILE_HDR:
{
ASSERT_GUEST_BREAK(cParms == 6);
VBOXDNDCBSNDFILEHDRDATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_GH_SND_FILE_HDR;
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pszFilePath, &data.cbFilePath);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.cbFilePath);
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.fFlags);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU32(&paParms[idxParm++], &data.fMode);
ASSERT_GUEST_RC_BREAK(rc);
rc = HGCMSvcGetU64(&paParms[idxParm], &data.cbSize);
ASSERT_GUEST_RC_BREAK(rc);
DO_HOST_CALLBACK();
break;
}
case GUEST_DND_FN_GH_SND_FILE_DATA:
{
switch (pClient->uProtocolVerDeprecated)
{
/* Protocol v3 adds (optional) checksums. */
case 3:
{
ASSERT_GUEST_BREAK(cParms == 5);
VBOXDNDCBSNDFILEDATADATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_GH_SND_FILE_DATA;
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pvData, &data.cbData);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.cbData);
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.u.v3.pvChecksum, &data.u.v3.cbChecksum);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.u.v3.cbChecksum);
DO_HOST_CALLBACK();
break;
}
/* Protocol v2 only sends the next data chunks to reduce traffic. */
case 2:
{
ASSERT_GUEST_BREAK(cParms == 3);
VBOXDNDCBSNDFILEDATADATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_GH_SND_FILE_DATA;
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pvData, &data.cbData);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm], data.cbData);
DO_HOST_CALLBACK();
break;
}
/* Protocol v1 sends the file path and attributes for every file chunk (!). */
default:
{
ASSERT_GUEST_BREAK(cParms == 5);
VBOXDNDCBSNDFILEDATADATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_GH_SND_FILE_DATA;
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.u.v1.pszFilePath, &data.u.v1.cbFilePath);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.u.v1.cbFilePath);
rc = HGCMSvcGetPv(&paParms[idxParm++], (void**)&data.pvData, &data.cbData);
ASSERT_GUEST_RC_BREAK(rc);
VERIFY_BUFFER_SIZE_UINT32(paParms[idxParm++], data.cbData);
rc = HGCMSvcGetU32(&paParms[idxParm], &data.u.v1.fMode);
ASSERT_GUEST_RC_BREAK(rc);
DO_HOST_CALLBACK();
break;
}
}
break;
}
case GUEST_DND_FN_EVT_ERROR:
{
ASSERT_GUEST_BREAK(cParms >= 1);
VBOXDNDCBEVTERRORDATA data;
RT_ZERO(data);
data.hdr.uMagic = CB_MAGIC_DND_EVT_ERROR;
GET_CONTEXT_ID_PARM0();
rc = HGCMSvcGetU32(&paParms[idxParm], (uint32_t *)&data.rc);
ASSERT_GUEST_RC_BREAK(rc);
DO_HOST_CALLBACK();
break;
}
#endif /* VBOX_WITH_DRAG_AND_DROP_GH */
default:
{
LogFlowFunc(("u32Function=%s (%#x), cParms=%RU32\n", DnDHostMsgToStr(u32Function), u32Function, cParms));
/* All other messages are handled by the DnD manager. */
rc = m_pManager->GetNextMsg(u32Function, cParms, paParms);
if (rc == VERR_NO_DATA) /* Manager has no new messsages? Try asking the host. */
{
if (m_SvcCtx.pfnHostCallback)
{
VBOXDNDCBHGGETNEXTHOSTMSGDATA data;
RT_ZERO(data);
data.hdr.uMagic = VBOX_DND_CB_MAGIC_MAKE(0 /* uFn */, 0 /* uVer */);
data.uMsg = u32Function;
data.cParms = cParms;
data.paParms = paParms;
rc = m_SvcCtx.pfnHostCallback(m_SvcCtx.pvHostData, u32Function, &data, sizeof(data));
if (RT_SUCCESS(rc))
{
cParms = data.cParms;
paParms = data.paParms;
}
else
{
if (rc == VERR_CANCELLED)
{
/* Host indicated that the current operation was cancelled. Tell the guest. */
LogFunc(("Host indicated that operation was cancelled\n"));
}
else
{
/*
* In case the guest is too fast asking for the next message
* and the host did not supply it yet, just defer the client's
* return until a response from the host available.
*/
LogFunc(("No new messages from the host (%Rrc), deferring request\n", rc));
rc = VINF_HGCM_ASYNC_EXECUTE;
}
}
}
else /* No host callback in place, so drag and drop is not supported by the host. */
rc = VERR_NOT_SUPPORTED;
}
break;
}
}
}
#undef VERIFY_BUFFER_SIZE_UINT32
/*
* If async execution is requested, we didn't notify the guest yet about
* completion. The client is queued into the waiters list and will be
* notified as soon as a new event is available.
*/
if (rc == VINF_HGCM_ASYNC_EXECUTE)
{
LogFunc(("Deferring client %RU32\n", idClient));
try
{
AssertPtr(pClient);
pClient->SetDeferred(callHandle, u32Function, cParms, paParms);
m_clientQueue.push_back(idClient);
}
catch (std::bad_alloc &)
{
rc = VERR_NO_MEMORY;
/* Don't report to guest. */
}
}
else if (pClient)
{
/* Complete the call on the guest side. */
pClient->Complete(callHandle, rc);
}
else
{
AssertMsgFailed(("Guest call failed with %Rrc\n", rc));
rc = VERR_NOT_IMPLEMENTED;
}
LogFunc(("Returning %Rrc to guest\n", rc));
}
int DragAndDropService::hostCall(uint32_t u32Function,
uint32_t cParms, VBOXHGCMSVCPARM paParms[]) RT_NOEXCEPT
{
LogFlowFunc(("u32Function=%s (%#x), cParms=%RU32, cClients=%zu, cQueue=%zu\n",
DnDHostMsgToStr(u32Function), u32Function, cParms, m_clientMap.size(), m_clientQueue.size()));
uint32_t const uMode = modeGet();
/* Check if we've the right mode set. */
int rc = VERR_ACCESS_DENIED; /* Play safe. */
switch (u32Function)
{
/*
* Host -> Guest mode
*/
case HOST_DND_FN_HG_EVT_ENTER:
RT_FALL_THROUGH();
case HOST_DND_FN_HG_EVT_MOVE:
RT_FALL_THROUGH();
case HOST_DND_FN_HG_EVT_LEAVE:
RT_FALL_THROUGH();
case HOST_DND_FN_HG_EVT_DROPPED:
RT_FALL_THROUGH();
case HOST_DND_FN_HG_SND_DATA_HDR:
RT_FALL_THROUGH();
case HOST_DND_FN_HG_SND_DATA:
RT_FALL_THROUGH();
case HOST_DND_FN_HG_SND_MORE_DATA:
RT_FALL_THROUGH();
case HOST_DND_FN_HG_SND_DIR:
RT_FALL_THROUGH();
case HOST_DND_FN_HG_SND_FILE_DATA:
RT_FALL_THROUGH();
case HOST_DND_FN_HG_SND_FILE_HDR:
{
if ( uMode == VBOX_DRAG_AND_DROP_MODE_HOST_TO_GUEST
|| uMode == VBOX_DRAG_AND_DROP_MODE_BIDIRECTIONAL)
rc = VINF_SUCCESS;
else
{
LogRel2(("DnD: Host to guest mode is disabled, ignoring request from host\n"));
}
break;
}
/*
* Guest -> Host mode
*/
case HOST_DND_FN_GH_REQ_PENDING:
RT_FALL_THROUGH();
case HOST_DND_FN_GH_EVT_DROPPED:
{
if ( uMode == VBOX_DRAG_AND_DROP_MODE_GUEST_TO_HOST
|| uMode == VBOX_DRAG_AND_DROP_MODE_BIDIRECTIONAL)
rc = VINF_SUCCESS;
else
{
LogRel2(("DnD: Guest to host mode is disabled, ignoring request from host\n"));
}
break;
}
/*
* Both modes
*/
case HOST_DND_FN_CANCEL:
if (uMode != VBOX_DRAG_AND_DROP_MODE_OFF)
rc = VINF_SUCCESS;
break;
/*
* Functions that always work.
*/
case HOST_DND_FN_SET_MODE:
rc = VINF_SUCCESS;
break;
/*
* Forbid everything else not explicitly allowed.
*/
default:
break;
}
if (RT_FAILURE(rc))
return rc;
bool fSendToGuest = false; /* Whether to send the message down to the guest side or not. */
switch (u32Function)
{
case HOST_DND_FN_SET_MODE:
{
if (cParms != 1)
rc = VERR_INVALID_PARAMETER;
else if (paParms[0].type != VBOX_HGCM_SVC_PARM_32BIT)
rc = VERR_INVALID_PARAMETER;
else
rc = modeSet(paParms[0].u.uint32);
break;
}
case HOST_DND_FN_CANCEL:
{
LogFlowFunc(("Cancelling all waiting clients ...\n"));
/* Forcefully reset the message queue, as the host has cancelled the current operation. */
m_pManager->Reset(true /* fForce */);
/*
* Wake up all deferred clients and tell them to process
* the cancelling message next.
*/
DnDClientQueue::iterator itQueue = m_clientQueue.begin();
while (itQueue != m_clientQueue.end())
{
DnDClientMap::iterator itClient = m_clientMap.find(*itQueue);
Assert(itClient != m_clientMap.end());
DragAndDropClient *pClient = itClient->second;
AssertPtr(pClient);
int rc2 = pClient->SetDeferredMsgInfo(HOST_DND_FN_CANCEL,
/* Protocol v3+ also contains the context ID. */
pClient->uProtocolVerDeprecated >= 3 ? 1 : 0);
AssertRC(rc2);
/* Return VERR_CANCELLED when waking up the guest side. */
pClient->CompleteDeferred(VERR_CANCELLED);
m_clientQueue.erase(itQueue);
itQueue = m_clientQueue.begin();
}
Assert(m_clientQueue.empty());
/* Tell the host that everything went well. */
rc = VINF_SUCCESS;
break;
}
case HOST_DND_FN_HG_EVT_ENTER:
{
/* Reset the message queue as a new DnD operation just began. */
m_pManager->Reset(false /* fForce */);
fSendToGuest = true;
rc = VINF_SUCCESS;
break;
}
default:
{
fSendToGuest = true;
rc = VINF_SUCCESS;
break;
}
}
do /* goto avoidance break-loop. */
{
if (fSendToGuest)
{
if (m_clientMap.empty()) /* At least one client on the guest connected? */
{
/*
* Tell the host that the guest does not support drag'n drop.
* This might happen due to not installed Guest Additions or
* not running VBoxTray/VBoxClient.
*/
rc = VERR_NOT_SUPPORTED;
break;
}
rc = m_pManager->AddMsg(u32Function, cParms, paParms, true /* fAppend */);
if (RT_FAILURE(rc))
{
AssertMsgFailed(("Adding new message of type=%RU32 failed with rc=%Rrc\n", u32Function, rc));
break;
}
/* Any clients in our queue ready for processing the next command? */
if (m_clientQueue.empty())
{
LogFlowFunc(("All clients (%zu) busy -- delaying execution\n", m_clientMap.size()));
break;
}
uint32_t uClientNext = m_clientQueue.front();
DnDClientMap::iterator itClientNext = m_clientMap.find(uClientNext);
Assert(itClientNext != m_clientMap.end());
DragAndDropClient *pClient = itClientNext->second;
AssertPtr(pClient);
/*
* Check if this was a request for getting the next host
* message. If so, return the message ID and the parameter
* count. The message itself has to be queued.
*/
uint32_t uMsgClient = pClient->GetMsgType();
uint32_t uMsgNext = 0;
uint32_t cParmsNext = 0;
/* Note: We only want to peek for the next message, hence fAddRef is false. */
int rcNext = m_pManager->GetNextMsgInfo(false /* fAddRef */, &uMsgNext, &cParmsNext);
LogFlowFunc(("uMsgClient=%s (%#x), uMsgNext=%s (%#x), cParmsNext=%RU32, rcNext=%Rrc\n",
DnDGuestMsgToStr(uMsgClient), uMsgClient, DnDHostMsgToStr(uMsgNext), uMsgNext, cParmsNext, rcNext));
if (RT_SUCCESS(rcNext))
{
if (uMsgClient == GUEST_DND_FN_GET_NEXT_HOST_MSG)
{
rc = pClient->SetDeferredMsgInfo(uMsgNext, cParmsNext);
/* Note: Report the current rc back to the guest. */
pClient->CompleteDeferred(rc);
}
/*
* Does the message the client is waiting for match the message
* next in the queue? Process it right away then.
*/
else if (uMsgClient == uMsgNext)
{
rc = m_pManager->GetNextMsg(u32Function, cParms, paParms);
/* Note: Report the current rc back to the guest. */
pClient->CompleteDeferred(rc);
}
else /* Should not happen; cancel the operation on the guest. */
{
LogFunc(("Client ID=%RU32 in wrong state with uMsg=%RU32 (next message in queue: %RU32), cancelling\n",
pClient->GetClientID(), uMsgClient, uMsgNext));
pClient->CompleteDeferred(VERR_CANCELLED);
}
m_clientQueue.pop_front();
}
} /* fSendToGuest */
} while (0); /* To use breaks. */
LogFlowFuncLeaveRC(rc);
return rc;
}
DECLCALLBACK(int) DragAndDropService::progressCallback(uint32_t uStatus, uint32_t uPercentage, int rc, void *pvUser)
{
AssertPtrReturn(pvUser, VERR_INVALID_POINTER);
DragAndDropService *pSelf = static_cast<DragAndDropService *>(pvUser);
AssertPtr(pSelf);
if (pSelf->m_SvcCtx.pfnHostCallback)
{
LogFlowFunc(("GUEST_DND_FN_HG_EVT_PROGRESS: uStatus=%RU32, uPercentage=%RU32, rc=%Rrc\n",
uStatus, uPercentage, rc));
VBOXDNDCBHGEVTPROGRESSDATA data;
data.hdr.uMagic = CB_MAGIC_DND_HG_EVT_PROGRESS;
data.uPercentage = RT_MIN(uPercentage, 100);
data.uStatus = uStatus;
data.rc = rc; /** @todo uin32_t vs. int. */
return pSelf->m_SvcCtx.pfnHostCallback(pSelf->m_SvcCtx.pvHostData,
GUEST_DND_FN_HG_EVT_PROGRESS,
&data, sizeof(data));
}
return VINF_SUCCESS;
}
/**
* @copydoc FNVBOXHGCMSVCLOAD
*/
extern "C" DECLCALLBACK(DECLEXPORT(int)) VBoxHGCMSvcLoad(VBOXHGCMSVCFNTABLE *pTable)
{
return DragAndDropService::svcLoad(pTable);
}
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