/* static */
DECLCALLBACK(int) Guest::notifyCtrlDispatcher(void *pvExtension,
uint32_t u32Function,
void *pvParms,
uint32_t cbParms)
{
using namespace guestControl;
/*
* No locking, as this is purely a notification which does not make any
* changes to the object state.
*/
LogFlowFunc(("pvExtension=%p, u32Function=%RU32, pvParms=%p, cbParms=%RU32\n",
pvExtension, u32Function, pvParms, cbParms));
ComObjPtr<Guest> pGuest = reinterpret_cast<Guest *>(pvExtension);
Assert(!pGuest.isNull());
/*
* For guest control 2.0 using the legacy commands we need to do the following here:
* - Get the callback header to access the context ID
* - Get the context ID of the callback
* - Extract the session ID out of the context ID
* - Dispatch the whole stuff to the appropriate session (if still exists)
*/
PCALLBACKHEADER pHeader = (PCALLBACKHEADER)pvParms;
AssertPtr(pHeader);
#ifdef DEBUG
LogFlowFunc(("CID=%RU32, uSession=%RU32, uObject=%RU32, uCount=%RU32\n",
pHeader->u32ContextID,
VBOX_GUESTCTRL_CONTEXTID_GET_SESSION(pHeader->u32ContextID),
VBOX_GUESTCTRL_CONTEXTID_GET_OBJECT(pHeader->u32ContextID),
VBOX_GUESTCTRL_CONTEXTID_GET_COUNT(pHeader->u32ContextID)));
#endif
bool fDispatch = true;
#ifdef DEBUG
/*
* Pre-check: If we got a status message with an error and VERR_TOO_MUCH_DATA
* it means that that guest could not handle the entire message
* because of its exceeding size. This should not happen on daily
* use but testcases might try this. It then makes no sense to dispatch
* this further because we don't have a valid context ID.
*/
if (u32Function == GUEST_EXEC_SEND_STATUS)
{
PCALLBACKDATAEXECSTATUS pCallbackData = reinterpret_cast<PCALLBACKDATAEXECSTATUS>(pvParms);
AssertPtr(pCallbackData);
AssertReturn(sizeof(CALLBACKDATAEXECSTATUS) == cbParms, VERR_INVALID_PARAMETER);
AssertReturn(CALLBACKDATAMAGIC_EXEC_STATUS == pCallbackData->hdr.u32Magic, VERR_INVALID_PARAMETER);
if ( pCallbackData->u32Status == PROC_STS_ERROR
&& ((int)pCallbackData->u32Flags) == VERR_TOO_MUCH_DATA)
{
LogFlowFunc(("Requested command with too much data, skipping dispatching ...\n"));
Assert(pCallbackData->u32PID == 0);
fDispatch = false;
}
}
#endif
int rc = VINF_SUCCESS;
if (fDispatch)
{
rc = pGuest->dispatchToSession(pHeader->u32ContextID, u32Function, pvParms, cbParms);
if (RT_SUCCESS(rc))
return rc;
}
LogFlowFuncLeaveRC(rc);
return rc;
}
