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windows-server-2003/enduser/netmeeting/as/cpi32/control.cpp

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#include "precomp.h"
//
// CONTROL.CPP
// Control by us, control of us
//
// Copyright(c) Microsoft 1997-
//
#define MLZ_FILE_ZONE ZONE_CORE
//
// CA_ReceivedPacket()
//
void ASShare::CA_ReceivedPacket
(
ASPerson * pasFrom,
PS20DATAPACKET pPacket
)
{
PCAPACKET pCAPacket;
DebugEntry(ASShare::CA_ReceivedPacket);
ValidatePerson(pasFrom);
pCAPacket = (PCAPACKET)pPacket;
switch (pCAPacket->msg)
{
case CA_MSG_NOTIFY_STATE:
if (pasFrom->cpcCaps.general.version < CAPS_VERSION_30)
{
ERROR_OUT(("Ignoring CA_MSG_NOTIFY_STATE from 2.x node [%d]",
pasFrom->mcsID));
}
else
{
CAHandleNewState(pasFrom, (PCANOTPACKET)pPacket);
}
break;
case CA_OLDMSG_DETACH:
case CA_OLDMSG_COOPERATE:
// Set "cooperating", and map it to allow/disallow control
CA2xCooperateChange(pasFrom, (pCAPacket->msg == CA_OLDMSG_COOPERATE));
break;
case CA_OLDMSG_REQUEST_CONTROL:
CA2xRequestControl(pasFrom, pCAPacket);
break;
case CA_OLDMSG_GRANTED_CONTROL:
CA2xGrantedControl(pasFrom, pCAPacket);
break;
default:
// Ignore for now -- old 2.x messages
break;
}
DebugExitVOID(ASShare::CA_ReceivedPacket);
}
//
// CA30_ReceivedPacket()
//
void ASShare::CA30_ReceivedPacket
(
ASPerson * pasFrom,
PS20DATAPACKET pPacket
)
{
LPBYTE pCAPacket;
DebugEntry(ASShare::CA30_ReceivedPacket);
pCAPacket = (LPBYTE)pPacket + sizeof(CA30PACKETHEADER);
if (pasFrom->cpcCaps.general.version < CAPS_VERSION_30)
{
ERROR_OUT(("Ignoring CA30 packet %d from 2.x node [%d]",
((PCA30PACKETHEADER)pPacket)->msg, pasFrom->mcsID));
DC_QUIT;
}
switch (((PCA30PACKETHEADER)pPacket)->msg)
{
// From VIEWER (remote) to HOST (us)
case CA_REQUEST_TAKECONTROL:
{
CAHandleRequestTakeControl(pasFrom, (PCA_RTC_PACKET)pCAPacket);
break;
}
// From HOST (remote) to VIEWER (us)
case CA_REPLY_REQUEST_TAKECONTROL:
{
CAHandleReplyRequestTakeControl(pasFrom, (PCA_REPLY_RTC_PACKET)pCAPacket);
break;
}
// From HOST (remote) to VIEWER (us)
case CA_REQUEST_GIVECONTROL:
{
CAHandleRequestGiveControl(pasFrom, (PCA_RGC_PACKET)pCAPacket);
break;
}
// From VIEWER (remote) to HOST (us)
case CA_REPLY_REQUEST_GIVECONTROL:
{
CAHandleReplyRequestGiveControl(pasFrom, (PCA_REPLY_RGC_PACKET)pCAPacket);
break;
}
// From CONTROLLER (remote) to HOST (us)
case CA_PREFER_PASSCONTROL:
{
CAHandlePreferPassControl(pasFrom, (PCA_PPC_PACKET)pCAPacket);
break;
}
// From CONTROLLER (remote) to HOST (us)
case CA_INFORM_RELEASEDCONTROL:
{
CAHandleInformReleasedControl(pasFrom, (PCA_INFORM_PACKET)pCAPacket);
break;
}
// From HOST (remote) to CONTROLLER (us)
case CA_INFORM_REVOKEDCONTROL:
{
CAHandleInformRevokedControl(pasFrom, (PCA_INFORM_PACKET)pCAPacket);
break;
}
// From HOST (remote) to CONTROLLER (us)
case CA_INFORM_PAUSEDCONTROL:
{
CAHandleInformPausedControl(pasFrom, (PCA_INFORM_PACKET)pCAPacket);
break;
}
// From HOST (remote) to CONTROLLER (us)
case CA_INFORM_UNPAUSEDCONTROL:
{
CAHandleInformUnpausedControl(pasFrom, (PCA_INFORM_PACKET)pCAPacket);
break;
}
default:
{
WARNING_OUT(("CA30_ReceivedPacket: unrecognized message %d",
((PCA30PACKETHEADER)pPacket)->msg));
break;
}
}
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA30_ReceivedPacket);
}
//
// CANewRequestID()
//
// Returns a new token. It uses the current value, fills in the new one, and
// also returns the new one. We wrap around if necessary. ZERO is never
// valid. Note that this is a unique identifier only to us.
//
// It is a stamp for the control operation. Since you can't be controlling
// and controlled at the same time, we have one stamp for all ops.
//
UINT ASShare::CANewRequestID(void)
{
DebugEntry(ASShare::CANewRequestID);
++(m_pasLocal->m_caControlID);
if (m_pasLocal->m_caControlID == 0)
{
++(m_pasLocal->m_caControlID);
}
DebugExitDWORD(ASShare::CANewRequestID, m_pasLocal->m_caControlID);
return(m_pasLocal->m_caControlID);
}
//
// CA_ViewStarting()
// Called when a REMOTE starts hosting
//
// We only do anything if it's a 2.x node since they could be cooperating
// but not hosting.
//
BOOL ASShare::CA_ViewStarting(ASPerson * pasPerson)
{
DebugEntry(ASShare::CA_ViewStarting);
//
// If this isn't a back level system, ignore it.
//
if (pasPerson->cpcCaps.general.version >= CAPS_VERSION_30)
{
DC_QUIT;
}
//
// See if AllowControl should now be on.
//
if (pasPerson->m_ca2xCooperating)
{
//
// Yes, it should. 2.x node is cooperating, now they are hosting,
// and we can take control of them.
//
ASSERT(!pasPerson->m_caAllowControl);
pasPerson->m_caAllowControl = TRUE;
VIEW_HostStateChange(pasPerson);
}
DC_EXIT_POINT:
DebugExitBOOL(ASShare::CA_ViewStarting, TRUE);
return(TRUE);
}
//
// CA_ViewEnded()
// Called when a REMOTE stopped hosting
//
void ASShare::CA_ViewEnded(ASPerson * pasPerson)
{
PCAREQUEST pRequest;
PCAREQUEST pNext;
DebugEntry(ASShare::CA_ViewEnded);
//
// Clear any control stuff we are a part of where they are the host
//
CA_ClearLocalState(CACLEAR_VIEW, pasPerson, FALSE);
//
// Clear any control stuff involving remotes
//
if (pasPerson->m_caControlledBy)
{
ASSERT(pasPerson->m_caControlledBy != m_pasLocal);
CAClearHostState(pasPerson, NULL);
ASSERT(!pasPerson->m_caControlledBy);
}
pasPerson->m_caAllowControl = FALSE;
//
// Clean up outstanding control packets to this person
//
pRequest = (PCAREQUEST)COM_BasedListFirst(&m_caQueuedMsgs, FIELD_OFFSET(CAREQUEST, chain));
while (pRequest)
{
pNext = (PCAREQUEST)COM_BasedListNext(&m_caQueuedMsgs, pRequest,
FIELD_OFFSET(CAREQUEST, chain));
if (pRequest->destID == pasPerson->mcsID)
{
if (pRequest->type == REQUEST_30)
{
//
// Delete messages sent by us to this person who is hosting
//
switch (pRequest->msg)
{
case CA_REQUEST_TAKECONTROL:
case CA_PREFER_PASSCONTROL:
case CA_REPLY_REQUEST_GIVECONTROL:
WARNING_OUT(("Deleting viewer control message %d, person [%d] stopped hosting",
pRequest->msg, pasPerson->mcsID));
COM_BasedListRemove(&pRequest->chain);
delete pRequest;
break;
}
}
else
{
ASSERT(pRequest->type == REQUEST_2X);
// Change GRANTED_CONTROL packets to this host to DETACH
if (pRequest->msg == CA_OLDMSG_GRANTED_CONTROL)
{
//
// For 2.x messages, destID is only non-zero when we are
// attempting to control a particular node. It allows us
// to undo/cancel control, to map our one-to-one model
// into the global 2.x collaboration model.
//
//
// Make this a DETACH, that way we don't have to worry if
// part of the COOPERATE/GRANTED_CONTROL sequence got out
// but part was left in the queue.
//
WARNING_OUT(("Changing GRANTED_CONTROL to 2.x host [%d] into DETATCH",
pasPerson->mcsID));
pRequest->destID = 0;
pRequest->msg = CA_OLDMSG_DETACH;
pRequest->req.req2x.data1 = 0;
pRequest->req.req2x.data2 = 0;
}
}
}
pRequest = pNext;
}
DebugExitVOID(ASView::CA_ViewEnded);
}
//
// CA_PartyLeftShare()
//
void ASShare::CA_PartyLeftShare(ASPerson * pasPerson)
{
DebugEntry(ASShare::CA_PartyLeftShare);
ValidatePerson(pasPerson);
//
// Clean up 2.x control stuff
//
if (pasPerson == m_ca2xControlTokenOwner)
{
m_ca2xControlTokenOwner = NULL;
}
//
// We must have cleaned up hosting info for this person already.
// So it can't be controlled or controllable.
//
ASSERT(!pasPerson->m_caAllowControl);
ASSERT(!pasPerson->m_caControlledBy);
if (pasPerson != m_pasLocal)
{
PCAREQUEST pRequest;
PCAREQUEST pNext;
//
// Clear any control stuff we are a part of where they are the
// viewer.
//
CA_ClearLocalState(CACLEAR_HOST, pasPerson, FALSE);
//
// Clear any control stuff involving remotes
//
if (pasPerson->m_caInControlOf)
{
ASSERT(pasPerson->m_caInControlOf != m_pasLocal);
CAClearHostState(pasPerson->m_caInControlOf, NULL);
}
//
// Clean up outgoing packets meant for this person.
//
pRequest = (PCAREQUEST)COM_BasedListFirst(&m_caQueuedMsgs, FIELD_OFFSET(CAREQUEST, chain));
while (pRequest)
{
pNext = (PCAREQUEST)COM_BasedListNext(&m_caQueuedMsgs, pRequest,
FIELD_OFFSET(CAREQUEST, chain));
//
// This doesn't need to know if it's a 2.x or 3.0 request,
// simply remove queued packets intended for somebody leaving.
//
// Only GRANTED_CONTROL requests will have non-zero destIDs of
// the 2.x packets.
//
if (pRequest->destID == pasPerson->mcsID)
{
WARNING_OUT(("Freeing outgoing RESPONSE to node [%d]", pasPerson->mcsID));
COM_BasedListRemove(&(pRequest->chain));
delete pRequest;
}
pRequest = pNext;
}
ASSERT(m_caWaitingForReplyFrom != pasPerson);
}
else
{
//
// When our waiting for/controlled dude stopped sharing, we should
// have cleaned this goop up.
//
ASSERT(!pasPerson->m_caInControlOf);
ASSERT(!pasPerson->m_caControlledBy);
ASSERT(!m_caWaitingForReplyFrom);
ASSERT(!m_caWaitingForReplyMsg);
//
// There should be NO outgoing control requests
//
ASSERT(COM_BasedListIsEmpty(&(m_caQueuedMsgs)));
}
DebugExitVOID(ASShare::CA_PartyLeftShare);
}
//
// CA_Periodic() -> SHARE STUFF
//
void ASShare::CA_Periodic(void)
{
DebugEntry(ASShare::CA_Periodic);
//
// Flush as many queued outgoing messages as we can
//
CAFlushOutgoingPackets();
DebugExitVOID(ASShare::CA_Periodic);
}
//
// CA_SyncAlreadyHosting()
//
void ASHost::CA_SyncAlreadyHosting(void)
{
DebugEntry(ASHost::CA_SyncAlreadyHosting);
m_caRetrySendState = TRUE;
DebugExitVOID(ASHost::CA_SyncAlreadyHosting);
}
//
// CA_Periodic() -> HOSTING STUFF
//
void ASHost::CA_Periodic(void)
{
DebugEntry(ASHost::CA_Periodic);
if (m_caRetrySendState)
{
PCANOTPACKET pPacket;
#ifdef _DEBUG
UINT sentSize;
#endif // _DEBUG
pPacket = (PCANOTPACKET)m_pShare->SC_AllocPkt(PROT_STR_MISC, g_s20BroadcastID,
sizeof(*pPacket));
if (!pPacket)
{
WARNING_OUT(("CA_Periodic: couldn't broadcast new state"));
}
else
{
pPacket->header.data.dataType = DT_CA;
pPacket->msg = CA_MSG_NOTIFY_STATE;
pPacket->state = 0;
if (m_pShare->m_pasLocal->m_caAllowControl)
pPacket->state |= CASTATE_ALLOWCONTROL;
if (m_pShare->m_pasLocal->m_caControlledBy)
pPacket->controllerID = m_pShare->m_pasLocal->m_caControlledBy->mcsID;
else
pPacket->controllerID = 0;
#ifdef _DEBUG
sentSize =
#endif // _DEBUG
m_pShare->DCS_CompressAndSendPacket(PROT_STR_MISC, g_s20BroadcastID,
&(pPacket->header), sizeof(*pPacket));
m_caRetrySendState = FALSE;
}
}
DebugExitVOID(ASHost::CA_Periodic);
}
//
// CAFlushOutgoingPackets()
//
// This tries to send private packets (not broadcast notifications) that
// we have accumulated. It returns TRUE if the outgoing queue is empty.
//
BOOL ASShare::CAFlushOutgoingPackets(void)
{
BOOL fEmpty = TRUE;
PCAREQUEST pRequest;
//
// If we're hosting and haven't yet flushed the HET or CA state,
// force queueing.
//
if (m_hetRetrySendState || (m_pHost && m_pHost->m_caRetrySendState))
{
TRACE_OUT(("CAFlushOutgoingPackets: force queuing, pending HET/CA state broadcast"));
fEmpty = FALSE;
DC_QUIT;
}
while (pRequest = (PCAREQUEST)COM_BasedListFirst(&m_caQueuedMsgs,
FIELD_OFFSET(CAREQUEST, chain)))
{
//
// Allocate/send packet
//
if (pRequest->type == REQUEST_30)
{
if (!CASendPacket(pRequest->destID, pRequest->msg,
&pRequest->req.req30.packet))
{
WARNING_OUT(("CAFlushOutgoingPackets: couldn't send request"));
fEmpty = FALSE;
break;
}
}
else
{
ASSERT(pRequest->type == REQUEST_2X);
if (!CA2xSendMsg(pRequest->destID, pRequest->msg,
pRequest->req.req2x.data1, pRequest->req.req2x.data2))
{
WARNING_OUT(("CAFlushOutgoingmsgs: couldn't send request"));
fEmpty = FALSE;
break;
}
}
//
// Do we do state transitions here or when things are added to queue?
// requestID, results are calculated when put on queue. Results can
// change though based on a future action.
//
COM_BasedListRemove(&(pRequest->chain));
delete pRequest;
}
DC_EXIT_POINT:
DebugExitBOOL(CAFlushOutgoingPackets, fEmpty);
return(fEmpty);
}
//
// CASendPacket()
// This sends a private message (request or response) to the destination.
// If there are queued private messages in front of this one, or we can't
// send it, we add it to the pending queue.
//
// This TRUE if sent.
//
// It's up to the caller to change state info appropriately.
//
BOOL ASShare::CASendPacket
(
UINT_PTR destID,
UINT msg,
PCA30P pData
)
{
BOOL fSent = FALSE;
PCA30PACKETHEADER pPacket;
#ifdef _DEBUG
UINT sentSize;
#endif // _DEBUG
DebugEntry(ASShare::CASendPacket);
//
// Note that CA30P does not include size of header.
//
pPacket = (PCA30PACKETHEADER)SC_AllocPkt(PROT_STR_INPUT, destID,
sizeof(CA30PACKETHEADER) + sizeof(*pData));
if (!pPacket)
{
WARNING_OUT(("CASendPacket: no memory to send %d packet to [%d]",
msg, destID));
DC_QUIT;
}
pPacket->header.data.dataType = DT_CA30;
pPacket->msg = msg;
memcpy(pPacket+1, pData, sizeof(*pData));
#ifdef _DEBUG
sentSize =
#endif // _DEBUG
DCS_CompressAndSendPacket(PROT_STR_INPUT, destID,
&(pPacket->header), sizeof(*pPacket));
TRACE_OUT(("CA30 request packet size: %08d, sent %08d", sizeof(*pPacket), sentSize));
fSent = TRUE;
DC_EXIT_POINT:
DebugExitBOOL(ASShare::CASendPacket, fSent);
return(fSent);
}
//
// CAQueueSendPacket()
// This flushes pending queued requests if there are any, then tries to
// send this one. If it can't, we add it to the queue. If there's not any
// memory even for that, we return an error about it.
//
BOOL ASShare::CAQueueSendPacket
(
UINT_PTR destID,
UINT msg,
PCA30P pPacketSend
)
{
BOOL rc = TRUE;
PCAREQUEST pCARequest;
DebugEntry(ASShare::CAQueueSendPacket);
//
// These must go out in order. So if any queued messages are still
// present, those must be sent first.
//
if (!CAFlushOutgoingPackets() ||
!CASendPacket(destID, msg, pPacketSend))
{
//
// We must queue this.
//
TRACE_OUT(("CAQueueSendPacket: queuing request for send later"));
pCARequest = new CAREQUEST;
if (!pCARequest)
{
ERROR_OUT(("CAQueueSendPacket: can't even allocate memory to queue request; must fail"));
rc = FALSE;
}
else
{
SET_STAMP(pCARequest, CAREQUEST);
pCARequest->type = REQUEST_30;
pCARequest->destID = destID;
pCARequest->msg = msg;
pCARequest->req.req30.packet = *pPacketSend;
//
// Stick this at the end of the queue
//
COM_BasedListInsertBefore(&(m_caQueuedMsgs), &(pCARequest->chain));
}
}
DebugExitBOOL(ASShare::CAQueueSendPacket, rc);
return(rc);
}
//
// CALangToggle()
//
// This temporarily turns off the keyboard language toggle key, so that a
// remote controlling us doesn't inadvertently change it. When we stop being
// controlled, we put it back.
//
void ASShare::CALangToggle(BOOL fBackOn)
{
//
// Local Variables
//
LONG rc;
HKEY hkeyToggle;
BYTE regValue[2];
DWORD cbRegValue;
DWORD dwType;
LPCSTR szValue;
DebugEntry(ASShare::CALangToggle);
szValue = (g_asWin95) ? NULL : LANGUAGE_TOGGLE_KEY_VAL;
if (fBackOn)
{
//
// We are gaining control of our local keyboard again - we restore the
// language togging functionality.
//
// We must directly access the registry to accomplish this.
//
if (m_caToggle != LANGUAGE_TOGGLE_NOT_PRESENT)
{
rc = RegOpenKey(HKEY_CURRENT_USER, LANGUAGE_TOGGLE_KEY,
&hkeyToggle);
if (rc == ERROR_SUCCESS)
{
//
// Clear the value for this key.
//
regValue[0] = m_caToggle;
regValue[1] = '\0'; // ensure NUL termination
//
// Restore the value.
//
RegSetValueEx(hkeyToggle, szValue, 0, REG_SZ,
regValue, sizeof(regValue));
//
// We need to inform the system about this change. We do not
// tell any other apps about this (ie do not set any of the
// notification flags as the last parm)
//
SystemParametersInfo(SPI_SETLANGTOGGLE, 0, 0, 0);
}
RegCloseKey(hkeyToggle);
}
}
else
{
//
// We are losing control of our keyboard - ensure that remote key
// events will not change our local keyboard settings by disabling the
// keyboard language toggle.
//
// We must directly access the registry to accomplish this.
//
rc = RegOpenKey(HKEY_CURRENT_USER, LANGUAGE_TOGGLE_KEY,
&hkeyToggle);
if (rc == ERROR_SUCCESS)
{
cbRegValue = sizeof(regValue);
rc = RegQueryValueEx(hkeyToggle, szValue, NULL,
&dwType, regValue, &cbRegValue);
if (rc == ERROR_SUCCESS)
{
m_caToggle = regValue[0];
//
// Clear the value for this key.
//
regValue[0] = '3';
regValue[1] = '\0'; // ensure NUL termination
//
// Clear the value.
//
RegSetValueEx(hkeyToggle, szValue, 0, REG_SZ,
regValue, sizeof(regValue));
//
// We need to inform the system about this change. We do not
// tell any other apps about this (ie do not set any of the
// notification flags as the last parm)
//
SystemParametersInfo(SPI_SETLANGTOGGLE, 0, 0, 0);
}
else
{
m_caToggle = LANGUAGE_TOGGLE_NOT_PRESENT;
}
RegCloseKey(hkeyToggle);
}
}
DebugExitVOID(ASShare::CALangToggle);
}
//
// CAStartControlled()
//
void ASShare::CAStartControlled
(
ASPerson * pasInControl,
UINT controlID
)
{
DebugEntry(ASShare::CAStartControlled);
ValidatePerson(pasInControl);
//
// Undo last known state of remote
//
CAClearRemoteState(pasInControl);
//
// Get any VIEW frame UI out of the way
//
SendMessage(g_asSession.hwndHostUI, HOST_MSG_CONTROLLED, TRUE, 0);
VIEWStartControlled(TRUE);
ASSERT(!m_pasLocal->m_caControlledBy);
m_pasLocal->m_caControlledBy = pasInControl;
ASSERT(!pasInControl->m_caInControlOf);
pasInControl->m_caInControlOf = m_pasLocal;
ASSERT(!pasInControl->m_caControlID);
ASSERT(controlID);
pasInControl->m_caControlID = controlID;
//
// Notify IM.
//
IM_Controlled(pasInControl);
//
// Disable language toggling.
//
CALangToggle(FALSE);
ASSERT(m_pHost);
m_pHost->CM_Controlled(pasInControl);
//
// Notify the UI. Pass GCCID of controller
//
DCS_NotifyUI(SH_EVT_STARTCONTROLLED, pasInControl->cpcCaps.share.gccID, 0);
//
// Broadcast new state
//
m_pHost->m_caRetrySendState = TRUE;
m_pHost->CA_Periodic();
DebugExitVOID(ASShare::CAStartControlled);
}
//
// CAStopControlled()
//
void ASShare::CAStopControlled(void)
{
ASPerson * pasControlledBy;
DebugEntry(ASShare::CAStopControlled);
pasControlledBy = m_pasLocal->m_caControlledBy;
ValidatePerson(pasControlledBy);
//
// If control is paused, unpause it.
//
if (m_pasLocal->m_caControlPaused)
{
CA_PauseControl(pasControlledBy, FALSE, FALSE);
}
m_pasLocal->m_caControlledBy = NULL;
ASSERT(pasControlledBy->m_caInControlOf == m_pasLocal);
pasControlledBy->m_caInControlOf = NULL;
ASSERT(pasControlledBy->m_caControlID);
pasControlledBy->m_caControlID = 0;
//
// Notify IM.
//
IM_Controlled(NULL);
//
// Restore language toggling functionality.
//
CALangToggle(TRUE);
ASSERT(m_pHost);
m_pHost->CM_Controlled(NULL);
VIEWStartControlled(FALSE);
ASSERT(IsWindow(g_asSession.hwndHostUI));
SendMessage(g_asSession.hwndHostUI, HOST_MSG_CONTROLLED, FALSE, 0);
//
// Notify the UI
//
DCS_NotifyUI(SH_EVT_STOPCONTROLLED, pasControlledBy->cpcCaps.share.gccID, 0);
//
// Broadcast the new state
//
m_pHost->m_caRetrySendState = TRUE;
m_pHost->CA_Periodic();
DebugExitVOID(ASShare::CAStopControlled);
}
//
// CAStartInControl()
//
void ASShare::CAStartInControl
(
ASPerson * pasControlled,
UINT controlID
)
{
DebugEntry(ASShare::CAStartInControl);
ValidatePerson(pasControlled);
//
// Undo last known state of host
//
CAClearRemoteState(pasControlled);
ASSERT(!m_pasLocal->m_caInControlOf);
m_pasLocal->m_caInControlOf = pasControlled;
ASSERT(!pasControlled->m_caControlledBy);
pasControlled->m_caControlledBy = m_pasLocal;
ASSERT(!pasControlled->m_caControlID);
ASSERT(controlID);
pasControlled->m_caControlID = controlID;
ASSERT(!g_lpimSharedData->imControlled);
IM_InControl(pasControlled);
VIEW_InControl(pasControlled, TRUE);
//
// Pass GCC ID of node we're controlling
//
DCS_NotifyUI(SH_EVT_STARTINCONTROL, pasControlled->cpcCaps.share.gccID, 0);
DebugExitVOID(ASShare::CAStartInControl);
}
//
// CAStopInControl()
//
void ASShare::CAStopInControl(void)
{
ASPerson * pasInControlOf;
DebugEntry(ASShare::CAStopInControl);
pasInControlOf = m_pasLocal->m_caInControlOf;
ValidatePerson(pasInControlOf);
if (pasInControlOf->m_caControlPaused)
{
pasInControlOf->m_caControlPaused = FALSE;
}
m_pasLocal->m_caInControlOf = NULL;
ASSERT(pasInControlOf->m_caControlledBy == m_pasLocal);
pasInControlOf->m_caControlledBy = NULL;
ASSERT(pasInControlOf->m_caControlID);
pasInControlOf->m_caControlID = 0;
ASSERT(!g_lpimSharedData->imControlled);
IM_InControl(NULL);
VIEW_InControl(pasInControlOf, FALSE);
DCS_NotifyUI(SH_EVT_STOPINCONTROL, pasInControlOf->cpcCaps.share.gccID, 0);
DebugExitVOID(ASShare::CAStopInControl);
}
//
// CA_AllowControl()
// Allows/disallows remotes from controlling us.
//
void ASShare::CA_AllowControl(BOOL fAllow)
{
DebugEntry(ASShare::CA_AllowControl);
if (!m_pHost)
{
WARNING_OUT(("CA_AllowControl: ignoring, we aren't hosting"));
DC_QUIT;
}
if (fAllow != m_pasLocal->m_caAllowControl)
{
if (!fAllow)
{
// Undo pending control/control queries/being controlled stuff
CA_ClearLocalState(CACLEAR_HOST, NULL, TRUE);
}
m_pasLocal->m_caAllowControl = fAllow;
ASSERT(IsWindow(g_asSession.hwndHostUI));
SendMessage(g_asSession.hwndHostUI, HOST_MSG_ALLOWCONTROL, fAllow, 0);
DCS_NotifyUI(SH_EVT_CONTROLLABLE, fAllow, 0);
m_pHost->m_caRetrySendState = TRUE;
}
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA_AllowControl);
}
//
// CA_HostEnded()
//
// When we stop hosting, we do not need to flush queued control
// responses. But we need to delete them!
//
void ASHost::CA_HostEnded(void)
{
PCAREQUEST pCARequest;
PCAREQUEST pCANext;
DebugEntry(ASHost::CA_HostEnded);
m_pShare->CA_ClearLocalState(CACLEAR_HOST, NULL, FALSE);
//
// Delete now obsolete messages originating from us as host.
//
pCARequest = (PCAREQUEST)COM_BasedListFirst(&m_pShare->m_caQueuedMsgs,
FIELD_OFFSET(CAREQUEST, chain));
while (pCARequest)
{
pCANext = (PCAREQUEST)COM_BasedListNext(&m_pShare->m_caQueuedMsgs, pCARequest,
FIELD_OFFSET(CAREQUEST, chain));
if (pCARequest->type == REQUEST_30)
{
switch (pCARequest->msg)
{
//
// Delete messages sent by us when we are hosting.
//
case CA_INFORM_PAUSEDCONTROL:
case CA_INFORM_UNPAUSEDCONTROL:
case CA_REPLY_REQUEST_TAKECONTROL:
case CA_REQUEST_GIVECONTROL:
WARNING_OUT(("Deleting host control message %d, we stopped hosting",
pCARequest->msg));
COM_BasedListRemove(&pCARequest->chain);
delete pCARequest;
break;
}
}
pCARequest = pCANext;
}
if (m_pShare->m_pasLocal->m_caAllowControl)
{
m_pShare->m_pasLocal->m_caAllowControl = FALSE;
ASSERT(IsWindow(g_asSession.hwndHostUI));
SendMessage(g_asSession.hwndHostUI, HOST_MSG_ALLOWCONTROL, FALSE, 0);
DCS_NotifyUI(SH_EVT_CONTROLLABLE, FALSE, 0);
}
DebugExitVOID(ASHost::CA_HostEnded);
}
//
// CA_TakeControl()
//
// Called by viewer to ask to take control of host. Note parallels to
// CA_GiveControl(), which is called by host to get same result.
//
void ASShare::CA_TakeControl(ASPerson * pasHost)
{
DebugEntry(ASShare::CA_TakeControl);
ValidatePerson(pasHost);
ASSERT(pasHost != m_pasLocal);
//
// If this person isn't hosting or controllable, fail.
//
if (!pasHost->m_pView)
{
WARNING_OUT(("CA_TakeControl: failing, person [%d] not hosting",
pasHost->mcsID));
DC_QUIT;
}
if (!pasHost->m_caAllowControl)
{
WARNING_OUT(("CA_TakeControl: failing, host [%d] not controllable",
pasHost->mcsID));
DC_QUIT;
}
//
// Undo current state.
//
CA_ClearLocalState(CACLEAR_ALL, NULL, TRUE);
//
// Now take control.
//
if (pasHost->cpcCaps.general.version >= CAPS_VERSION_30)
{
//
// 3.0 host
//
CA30P packetSend;
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.rtc.viewerControlID = CANewRequestID();
if (CAQueueSendPacket(pasHost->mcsID, CA_REQUEST_TAKECONTROL, &packetSend))
{
//
// Now we're in waiting state.
//
CAStartWaiting(pasHost, CA_REPLY_REQUEST_TAKECONTROL);
VIEW_UpdateStatus(pasHost, IDS_STATUS_WAITINGFORCONTROL);
}
else
{
WARNING_OUT(("CA_TakeControl of [%d]: failing, out of memory", pasHost->mcsID));
}
}
else
{
CA2xTakeControl(pasHost);
}
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA_TakeControl);
}
//
// CA_CancelTakeControl()
//
void ASShare::CA_CancelTakeControl
(
ASPerson * pasHost,
BOOL fPacket
)
{
DebugEntry(ASShare::CA_CancelTakeControl);
ValidatePerson(pasHost);
ASSERT(pasHost != m_pasLocal);
if ((m_caWaitingForReplyFrom != pasHost) ||
(m_caWaitingForReplyMsg != CA_REPLY_REQUEST_TAKECONTROL))
{
// We're not waiting for control of this host.
WARNING_OUT(("CA_CancelTakeControl failing; not waiting to take control of [%d]",
pasHost->mcsID));
DC_QUIT;
}
ASSERT(pasHost->cpcCaps.general.version >= CAPS_VERSION_30);
ASSERT(pasHost->m_caControlID == 0);
if (fPacket)
{
CA30P packetSend;
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.inform.viewerControlID = m_pasLocal->m_caControlID;
packetSend.inform.hostControlID = pasHost->m_caControlID;
if (!CAQueueSendPacket(pasHost->mcsID, CA_INFORM_RELEASEDCONTROL,
&packetSend))
{
WARNING_OUT(("Couldn't tell node [%d] we're no longer waiting for control",
pasHost->mcsID));
}
}
m_caWaitingForReplyFrom = NULL;
m_caWaitingForReplyMsg = 0;
VIEW_UpdateStatus(pasHost, IDS_STATUS_NONE);
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA_CancelTakeControl);
}
//
// CA_ReleaseControl()
//
void ASShare::CA_ReleaseControl
(
ASPerson * pasHost,
BOOL fPacket
)
{
DebugEntry(ASShare::CA_ReleaseControl);
ValidatePerson(pasHost);
ASSERT(pasHost != m_pasLocal);
if (pasHost->m_caControlledBy != m_pasLocal)
{
// We're not in control of this dude, nothing to do.
WARNING_OUT(("CA_ReleaseControl failing; not in control of [%d]",
pasHost->mcsID));
DC_QUIT;
}
ASSERT(!m_caWaitingForReplyFrom);
ASSERT(!m_caWaitingForReplyMsg);
if (fPacket)
{
if (pasHost->cpcCaps.general.version >= CAPS_VERSION_30)
{
CA30P packetSend;
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.inform.viewerControlID = m_pasLocal->m_caControlID;
packetSend.inform.hostControlID = pasHost->m_caControlID;
if (!CAQueueSendPacket(pasHost->mcsID, CA_INFORM_RELEASEDCONTROL,
&packetSend))
{
WARNING_OUT(("Couldn't tell node [%d] they're no longer controlled",
pasHost->mcsID));
}
}
else
{
if (!CA2xQueueSendMsg(0, CA_OLDMSG_DETACH, 0, 0))
{
WARNING_OUT(("Couldn't tell 2.x node [%d] they're no longer controlled",
pasHost->mcsID));
}
}
}
CAStopInControl();
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA_ReleaseControl);
}
//
// CA_PassControl()
//
void ASShare::CA_PassControl(ASPerson * pasHost, ASPerson * pasViewer)
{
CA30P packetSend;
DebugEntry(ASShare::CA_PassControl);
ValidatePerson(pasHost);
ValidatePerson(pasViewer);
ASSERT(pasHost != pasViewer);
ASSERT(pasHost != m_pasLocal);
ASSERT(pasViewer != m_pasLocal);
if (pasHost->m_caControlledBy != m_pasLocal)
{
WARNING_OUT(("CA_PassControl: failing, we're not in control of [%d]",
pasHost->mcsID));
DC_QUIT;
}
ASSERT(!m_caWaitingForReplyFrom);
ASSERT(!m_caWaitingForReplyMsg);
//
// No 2.x nodes, neither host nor controller, allowed
//
if ((pasHost->cpcCaps.general.version < CAPS_VERSION_30) ||
(pasViewer->cpcCaps.general.version < CAPS_VERSION_30))
{
WARNING_OUT(("CA_PassControl: failing, we can't pass control with 2.x nodes"));
DC_QUIT;
}
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.ppc.viewerControlID = m_pasLocal->m_caControlID;
packetSend.ppc.hostControlID = pasHost->m_caControlID;
packetSend.ppc.mcsPassTo = pasViewer->mcsID;
if (CAQueueSendPacket(pasHost->mcsID, CA_PREFER_PASSCONTROL, &packetSend))
{
CAStopInControl();
}
else
{
WARNING_OUT(("Couldn't tell node [%d] we want them to pass control to [%d]",
pasHost->mcsID, pasViewer->mcsID));
}
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA_PassControl);
}
//
// CA_GiveControl()
//
// Called by host to ask to grant control to viewer. Note parallels to
// CA_TakeControl(), which is called by viewer to get same result.
//
void ASShare::CA_GiveControl(ASPerson * pasTo)
{
CA30P packetSend;
DebugEntry(ASShare::CA_GiveControl);
ValidatePerson(pasTo);
ASSERT(pasTo != m_pasLocal);
//
// If we aren't hosting or controllable, fail.
//
if (!m_pHost)
{
WARNING_OUT(("CA_GiveControl: failing, we're not hosting"));
DC_QUIT;
}
if (!m_pasLocal->m_caAllowControl)
{
WARNING_OUT(("CA_GiveControl: failing, we're not controllable"));
DC_QUIT;
}
if (pasTo->cpcCaps.general.version < CAPS_VERSION_30)
{
//
// Can't do this with 2.x node.
//
WARNING_OUT(("CA_GiveControl: failing, can't invite 2.x node [%d]",
pasTo->mcsID));
DC_QUIT;
}
//
// Undo our control state.
//
CA_ClearLocalState(CACLEAR_ALL, NULL, TRUE);
//
// Now invite control.
//
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.rgc.hostControlID = CANewRequestID();
packetSend.rgc.mcsPassFrom = 0;
if (CAQueueSendPacket(pasTo->mcsID, CA_REQUEST_GIVECONTROL, &packetSend))
{
//
// Now we're in waiting state.
//
CAStartWaiting(pasTo, CA_REPLY_REQUEST_GIVECONTROL);
}
else
{
WARNING_OUT(("CA_GiveControl of [%d]: failing, out of memory", pasTo->mcsID));
}
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA_GiveControl);
}
//
// CA_CancelGiveControl()
// Cancels an invite TAKE or PASS request.
//
void ASShare::CA_CancelGiveControl
(
ASPerson * pasTo,
BOOL fPacket
)
{
DebugEntry(ASShare::CA_CancelGiveControl);
ValidatePerson(pasTo);
ASSERT(pasTo != m_pasLocal);
//
// Have we invited this person, and are we now waiting for a response?
//
if ((m_caWaitingForReplyFrom != pasTo) ||
(m_caWaitingForReplyMsg != CA_REPLY_REQUEST_GIVECONTROL))
{
// We're not waiting to be controlled by this viewer.
WARNING_OUT(("CA_CancelGiveControl failing; not waiting to give control to [%d]",
pasTo->mcsID));
DC_QUIT;
}
ASSERT(pasTo->cpcCaps.general.version >= CAPS_VERSION_30);
ASSERT(!pasTo->m_caControlID);
if (fPacket)
{
CA30P packetSend;
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.inform.viewerControlID = pasTo->m_caControlID;
packetSend.inform.hostControlID = m_pasLocal->m_caControlID;
if (!CAQueueSendPacket(pasTo->mcsID, CA_INFORM_REVOKEDCONTROL,
&packetSend))
{
WARNING_OUT(("Couldn't tell node [%d] they're no longer invited to control us",
pasTo->mcsID));
}
}
m_caWaitingForReplyFrom = NULL;
m_caWaitingForReplyMsg = 0;
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA_CancelGiveControl);
}
//
// CA_RevokeControl()
// Takes control back. If we're cleaning up (we've stopped hosting or
//
//
void ASShare::CA_RevokeControl
(
ASPerson * pasInControl,
BOOL fPacket
)
{
CA30P packetSend;
PCAREQUEST pRequest;
DebugEntry(ASShare::CA_RevokeControl);
//
// If the response to pasController is still queued, simply delete it.
// There should NOT be any CARESULT_CONFIRMED responses left.
//
// Otherwise, if it wasn't found, we must send a packet.
//
ValidatePerson(pasInControl);
ASSERT(pasInControl != m_pasLocal);
if (pasInControl != m_pasLocal->m_caControlledBy)
{
WARNING_OUT(("CA_RevokeControl: node [%d] not in control of us",
pasInControl->mcsID));
DC_QUIT;
}
//
// Take control back if we're being controlled
//
if (fPacket)
{
//
// Regardless of whether we can queue or not, we get control back!
// Note that we use the controller's request ID, so he knows if
// this is still applicable.
//
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.inform.viewerControlID = pasInControl->m_caControlID;
packetSend.inform.hostControlID = m_pasLocal->m_caControlID;
if (!CAQueueSendPacket(pasInControl->mcsID, CA_INFORM_REVOKEDCONTROL,
&packetSend))
{
WARNING_OUT(("Couldn't tell node [%d] they're no longer in control",
pasInControl->mcsID));
}
}
CAStopControlled();
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA_RevokeControl);
}
//
// CA_PauseControl()
//
void ASShare::CA_PauseControl
(
ASPerson * pasControlledBy,
BOOL fPause,
BOOL fPacket
)
{
DebugEntry(ASShare::CA_PauseControl);
ValidatePerson(pasControlledBy);
ASSERT(pasControlledBy != m_pasLocal);
//
// If we aren't a controlled host, this doesn't do anything.
//
if (pasControlledBy != m_pasLocal->m_caControlledBy)
{
WARNING_OUT(("CA_PauseControl failing; not controlled by [%d]", pasControlledBy->mcsID));
DC_QUIT;
}
ASSERT(m_pHost);
ASSERT(m_pasLocal->m_caAllowControl);
if (m_pasLocal->m_caControlPaused == (fPause != FALSE))
{
WARNING_OUT(("CA_PauseControl failing; already in requested state"));
DC_QUIT;
}
if (fPacket)
{
CA30P packetSend;
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.inform.viewerControlID = m_pasLocal->m_caControlledBy->m_caControlID;
packetSend.inform.hostControlID = m_pasLocal->m_caControlID;
if (!CAQueueSendPacket(m_pasLocal->m_caControlledBy->mcsID,
(fPause ? CA_INFORM_PAUSEDCONTROL : CA_INFORM_UNPAUSEDCONTROL),
&packetSend))
{
WARNING_OUT(("CA_PauseControl: out of memory, can't notify [%d]",
m_pasLocal->m_caControlledBy->mcsID));
}
}
// Do pause
m_pasLocal->m_caControlPaused = (fPause != FALSE);
g_lpimSharedData->imPaused = (fPause != FALSE);
DCS_NotifyUI((fPause ? SH_EVT_PAUSEDCONTROLLED : SH_EVT_UNPAUSEDCONTROLLED),
pasControlledBy->cpcCaps.share.gccID, 0);
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA_PauseControl);
}
//
// CAHandleRequestTakeControl()
// WE are HOST, REMOTE is VIEWER
// Handles incoming take control request. If our state is good, we accept.
//
void ASShare::CAHandleRequestTakeControl
(
ASPerson * pasViewer,
PCA_RTC_PACKET pPacketRecv
)
{
UINT result = CARESULT_CONFIRMED;
DebugEntry(ASShare::CAHandleRequestTakeControl);
ValidatePerson(pasViewer);
//
// If we aren't hosting, or haven't turned allow control on, we're
// not controllable.
//
if (!m_pHost || !m_pasLocal->m_caAllowControl)
{
result = CARESULT_DENIED_WRONGSTATE;
goto RESPOND_PACKET;
}
//
// Are we doing something else right now? Waiting to hear back about
// something?
//
if (m_caWaitingForReplyFrom)
{
result = CARESULT_DENIED_BUSY;
goto RESPOND_PACKET;
}
if (m_caQueryDlg)
{
result = CARESULT_DENIED_BUSY;
goto RESPOND_PACKET;
}
//
// LAURABU TEMPORARY:
// In a bit, if we're controlled when a new control request comes in,
// pause control then allow host to handle it.
//
if (m_pasLocal->m_caControlledBy)
{
result = CARESULT_DENIED_BUSY;
goto RESPOND_PACKET;
}
//
// Try to put up query dialog
//
if (!CAStartQuery(pasViewer, CA_REQUEST_TAKECONTROL, (PCA30P)pPacketRecv))
{
result = CARESULT_DENIED;
}
RESPOND_PACKET:
if (result != CARESULT_CONFIRMED)
{
// Instant failure.
CACompleteRequestTakeControl(pasViewer, pPacketRecv, result);
}
else
{
//
// We're in a waiting state. CACompleteRequestTakeControl() will
// complete later or the request will just go away.
//
}
DebugExitVOID(ASShare::CAHandleRequestTakeControl);
}
//
// CACompleteRequestTakeControl()
// WE are HOST, REMOTE is VIEWER
// Completes the take control request.
//
void ASShare::CACompleteRequestTakeControl
(
ASPerson * pasFrom,
PCA_RTC_PACKET pPacketRecv,
UINT result
)
{
CA30P packetSend;
DebugEntry(ASShare::CACompleteRequestTakeControl);
ValidatePerson(pasFrom);
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.rrtc.viewerControlID = pPacketRecv->viewerControlID;
packetSend.rrtc.result = result;
if (result == CARESULT_CONFIRMED)
{
packetSend.rrtc.hostControlID = CANewRequestID();
}
if (CAQueueSendPacket(pasFrom->mcsID, CA_REPLY_REQUEST_TAKECONTROL, &packetSend))
{
if (result == CARESULT_CONFIRMED)
{
// Clear current state, whatever that is.
CA_ClearLocalState(CACLEAR_ALL, NULL, TRUE);
// We are now controlled by the sender.
CAStartControlled(pasFrom, pPacketRecv->viewerControlID);
}
else
{
WARNING_OUT(("Denying REQUEST TAKE CONTROL from [%d] with reason %d",
pasFrom->mcsID, result));
}
}
else
{
WARNING_OUT(("Reply to REQUEST TAKE CONTROL from [%d] failing, out of memory",
pasFrom->mcsID));
}
DebugExitVOID(ASShare::CACompleteRequestTakeControl);
}
//
// CAHandleReplyRequestTakeControl()
// WE are VIEWER, REMOTE is HOST
// Handles reply to previous take control request.
//
void ASShare::CAHandleReplyRequestTakeControl
(
ASPerson * pasHost,
PCA_REPLY_RTC_PACKET pPacketRecv
)
{
DebugEntry(ASShare::CAHandleReplyRequestTakeControl);
ValidatePerson(pasHost);
if (pPacketRecv->result == CARESULT_CONFIRMED)
{
// On success, should have valid op ID.
ASSERT(pPacketRecv->hostControlID);
}
else
{
// On failure, should have invalid op ID.
ASSERT(!pPacketRecv->hostControlID);
}
//
// Is this response for the current control op?
//
if ((m_caWaitingForReplyFrom != pasHost) ||
(m_caWaitingForReplyMsg != CA_REPLY_REQUEST_TAKECONTROL))
{
WARNING_OUT(("Ignoring TAKE CONTROL REPLY from [%d], not waiting for one",
pasHost->mcsID));
DC_QUIT;
}
if (pPacketRecv->viewerControlID != m_pasLocal->m_caControlID)
{
WARNING_OUT(("Ignoring TAKE CONTROL REPLY from [%d], request %d is out of date",
pasHost->mcsID, pPacketRecv->viewerControlID));
DC_QUIT;
}
ASSERT(!m_caQueryDlg);
//
// Cleanup waiting state (for both failure & success)
//
CA_CancelTakeControl(pasHost, FALSE);
ASSERT(!m_caWaitingForReplyFrom);
ASSERT(!m_caWaitingForReplyMsg);
if (pPacketRecv->result == CARESULT_CONFIRMED)
{
// Success! We're now in control of the host.
// Make sure our own state is OK
ASSERT(!m_pasLocal->m_caControlledBy);
ASSERT(!m_pasLocal->m_caInControlOf);
CAStartInControl(pasHost, pPacketRecv->hostControlID);
}
else
{
UINT ids;
WARNING_OUT(("TAKE CONTROL REPLY from host [%d] is failure %d", pasHost->mcsID,
pPacketRecv->result));
ids = IDS_ERR_TAKECONTROL_MIN + pPacketRecv->result;
if ((ids < IDS_ERR_TAKECONTROL_FIRST) || (ids > IDS_ERR_TAKECONTROL_LAST))
ids = IDS_ERR_TAKECONTROL_LAST;
VIEW_Message(pasHost, ids);
}
DC_EXIT_POINT:
DebugExitVOID(ASShare::CAHandleReplyRequestTakeControl);
}
//
// CAHandleRequestGiveControl()
// WE are VIEWER, REMOTE is HOST
// Handles incoming take control invite. If our state is good, we accept.
//
// NOTE how similar this routine is to CAHandleRequestTakeControl(). They
// are inverses of each other. With RequestTake/Reply sequence, viewer
// initiates, host finishes. With RequestGive/Reply sequence, host initiates,
// viewer finishes. Both end up with viewer in control of host when
// completed successfully.
//
void ASShare::CAHandleRequestGiveControl
(
ASPerson * pasHost,
PCA_RGC_PACKET pPacketRecv
)
{
UINT result = CARESULT_CONFIRMED;
DebugEntry(ASShare::CAHandleRequestGiveControl);
ValidatePerson(pasHost);
//
// Is this node hosting as far as we know. If not, or has not turned
// on allow control, we can't do it.
//
if (!pasHost->m_pView)
{
WARNING_OUT(("GIVE CONTROL went ahead of HOSTING, that's bad"));
result = CARESULT_DENIED_WRONGSTATE;
goto RESPOND_PACKET;
}
if (!pasHost->m_caAllowControl)
{
//
// We haven't got an AllowControl notification yet, this info is
// more up to-date. Make use of it.
//
WARNING_OUT(("GIVE CONTROL went ahead of ALLOW CONTROL, that's kind of bad"));
result = CARESULT_DENIED_WRONGSTATE;
goto RESPOND_PACKET;
}
//
// Are we doing something else right now? Waiting to hear back about
// something?
//
if (m_caWaitingForReplyFrom)
{
result = CARESULT_DENIED_BUSY;
goto RESPOND_PACKET;
}
if (m_caQueryDlg)
{
result = CARESULT_DENIED_BUSY;
goto RESPOND_PACKET;
}
//
// LAURABU TEMPORARY:
// In a bit, if we're controlled when a new control request comes in,
// pause control then allow host to handle it.
//
if (m_pasLocal->m_caControlledBy)
{
result = CARESULT_DENIED_BUSY;
goto RESPOND_PACKET;
}
//
// Try to put up query dialog
//
if (!CAStartQuery(pasHost, CA_REQUEST_GIVECONTROL, (PCA30P)pPacketRecv))
{
result = CARESULT_DENIED;
}
RESPOND_PACKET:
if (result != CARESULT_CONFIRMED)
{
// Instant failure.
CACompleteRequestGiveControl(pasHost, pPacketRecv, result);
}
else
{
//
// We're in a waiting state. CACompleteRequestGiveControl() will
// complete later or the request will just go away.
//
}
DebugExitVOID(ASShare::CAHandleRequestGiveControl);
}
//
// CACompleteRequestGiveControl()
// WE are VIEWER, REMOTE is HOST
// Completes the invite control request.
//
void ASShare::CACompleteRequestGiveControl
(
ASPerson * pasFrom,
PCA_RGC_PACKET pPacketRecv,
UINT result
)
{
CA30P packetSend;
DebugEntry(ASShare::CACompleteRequestGiveControl);
ValidatePerson(pasFrom);
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.rrgc.hostControlID = pPacketRecv->hostControlID;
packetSend.rrgc.result = result;
if (result == CARESULT_CONFIRMED)
{
packetSend.rrgc.viewerControlID = CANewRequestID();
}
if (CAQueueSendPacket(pasFrom->mcsID, CA_REPLY_REQUEST_GIVECONTROL, &packetSend))
{
//
// If this is successful, change our state. We're now in control.
//
if (result == CARESULT_CONFIRMED)
{
// Clear current state, whatever that is.
CA_ClearLocalState(CACLEAR_ALL, NULL, TRUE);
CAStartInControl(pasFrom, pPacketRecv->hostControlID);
}
else
{
WARNING_OUT(("Denying GIVE CONTROL from [%d] with reason %d",
pasFrom->mcsID, result));
}
}
else
{
WARNING_OUT(("Reply to GIVE CONTROL from [%d] failing, out of memory",
pasFrom->mcsID));
}
DebugExitVOID(ASShare::CACompleteRequestGiveControl);
}
//
// CAHandleReplyRequestGiveControl()
// WE are HOST, REMOTE is VIEWER
// Handles reply to previous take control invite.
//
void ASShare::CAHandleReplyRequestGiveControl
(
ASPerson * pasViewer,
PCA_REPLY_RGC_PACKET pPacketRecv
)
{
DebugEntry(ASShare::CAHandleReplyRequestGiveControl);
ValidatePerson(pasViewer);
if (pPacketRecv->result == CARESULT_CONFIRMED)
{
// On success, should have valid op ID.
ASSERT(pPacketRecv->viewerControlID);
}
else
{
// On failure, should have invalid op ID.
ASSERT(!pPacketRecv->viewerControlID);
}
//
// Is this response for the latest control op?
//
if ((m_caWaitingForReplyFrom != pasViewer) ||
(m_caWaitingForReplyMsg != CA_REPLY_REQUEST_GIVECONTROL))
{
WARNING_OUT(("Ignoring GIVE CONTROL REPLY from [%d], not waiting for one",
pasViewer->mcsID));
DC_QUIT;
}
if (pPacketRecv->hostControlID != m_pasLocal->m_caControlID)
{
WARNING_OUT(("Ignoring GIVE CONTROL REPLY from [%d], request %d is out of date",
pasViewer->mcsID, pPacketRecv->hostControlID));
DC_QUIT;
}
ASSERT(!m_caQueryDlg);
ASSERT(m_pHost);
ASSERT(m_pasLocal->m_caAllowControl);
//
// Cleanup waiting state (for both failure & success)
//
CA_CancelGiveControl(pasViewer, FALSE);
ASSERT(!m_caWaitingForReplyFrom);
ASSERT(!m_caWaitingForReplyMsg);
if (pPacketRecv->result == CARESULT_CONFIRMED)
{
// Success! We are now controlled by the viewer
// Make sure our own state is OK
ASSERT(!m_pasLocal->m_caControlledBy);
ASSERT(!m_pasLocal->m_caInControlOf);
CAStartControlled(pasViewer, pPacketRecv->viewerControlID);
}
else
{
WARNING_OUT(("GIVE CONTROL to viewer [%d] was denied", pasViewer->mcsID));
}
DC_EXIT_POINT:
DebugExitVOID(ASShare::CAHandleReplyRequestGiveControl);
}
//
// CAHandlePreferPassControl()
// WE are HOST, REMOTE is CONTROLLER
// Handles incoming pass control request. If we are controlled by the
// remote, and end user is cool with it, accept.
//
void ASShare::CAHandlePreferPassControl
(
ASPerson * pasController,
PCA_PPC_PACKET pPacketRecv
)
{
ASPerson * pasNewController;
DebugEntry(ASShare::CAHandlePreferPassControl);
ValidatePerson(pasController);
//
// If we're not controlled by the requester, ignore it.
//
if (m_pasLocal->m_caControlledBy != pasController)
{
WARNING_OUT(("Ignoring PASS CONTROL from [%d], not controlled by him",
pasController->mcsID));
DC_QUIT;
}
if ((pPacketRecv->viewerControlID != pasController->m_caControlID) ||
(pPacketRecv->hostControlID != m_pasLocal->m_caControlID))
{
WARNING_OUT(("Ignoring PASS CONTROL from [%d], request %d %d out of date",
pasController->mcsID, pPacketRecv->viewerControlID, pPacketRecv->hostControlID));
DC_QUIT;
}
ASSERT(!m_caQueryDlg);
ASSERT(!m_caWaitingForReplyFrom);
ASSERT(!m_caWaitingForReplyMsg);
//
// OK, the sender is not in control of us anymore.
//
CA_RevokeControl(pasController, FALSE);
// Is the pass to person specified valid?
pasNewController = SC_PersonFromNetID(pPacketRecv->mcsPassTo);
if (!pasNewController ||
(pasNewController == pasController) ||
(pasNewController == m_pasLocal) ||
(pasNewController->cpcCaps.general.version < CAPS_VERSION_30))
{
WARNING_OUT(("PASS CONTROL to [%d] failing, not valid person to pass to",
pPacketRecv->mcsPassTo));
DC_QUIT;
}
//
// Try to put up query dialog
//
if (!CAStartQuery(pasController, CA_PREFER_PASSCONTROL, (PCA30P)pPacketRecv))
{
// Instant failure. In this case, no packet.
WARNING_OUT(("Denying PREFER PASS CONTROL from [%d], out of memory",
pasController->mcsID));
}
else
{
//
// We're in a waiting state. CACompletePreferPassControl() will
// complete later or the request will just go away.
//
}
DC_EXIT_POINT:
DebugExitVOID(ASShare::CAHandlePreferPassControl);
}
//
// CACompletePreferPassControl()
// WE are HOST, REMOTE is new potential CONTROLLER
// Completes the prefer pass control request.
//
void ASShare::CACompletePreferPassControl
(
ASPerson * pasTo,
UINT_PTR mcsOrg,
PCA_PPC_PACKET pPacketRecv,
UINT result
)
{
CA30P packetSend;
DebugEntry(ASShare::CACompletePreferPassControl);
ValidatePerson(pasTo);
if (result == CARESULT_CONFIRMED)
{
ZeroMemory(&packetSend, sizeof(packetSend));
packetSend.rgc.hostControlID = CANewRequestID();
packetSend.rgc.mcsPassFrom = mcsOrg;
if (CAQueueSendPacket(pasTo->mcsID, CA_REQUEST_GIVECONTROL,
&packetSend))
{
CA_ClearLocalState(CACLEAR_HOST, NULL, TRUE);
CAStartWaiting(pasTo, CA_REPLY_REQUEST_GIVECONTROL);
}
else
{
WARNING_OUT(("Reply to PREFER PASS CONTROL from [%d] to [%d] failing, out of memory",
mcsOrg, pasTo->mcsID));
}
}
else
{
WARNING_OUT(("Denying PREFER PASS CONTROL from [%d] to [%d] with reason %d",
mcsOrg, pasTo->mcsID, result));
}
DebugExitVOID(ASShare::CACompletePreferPassControl);
}
//
// CAHandleInformReleasedControl()
// WE are HOST, REMOTE is CONTROLLER
//
void ASShare::CAHandleInformReleasedControl
(
ASPerson * pasController,
PCA_INFORM_PACKET pPacketRecv
)
{
DebugEntry(ASShare::CAHandleInformReleasedControl);
ValidatePerson(pasController);
//
// Do we currently have a TakeControl dialog up for this request? If so,
// take it down but don't send a packet.
//
if (m_caQueryDlg &&
(m_caQuery.pasReplyTo == pasController) &&
(m_caQuery.msg == CA_REQUEST_TAKECONTROL) &&
(m_caQuery.request.rtc.viewerControlID == pPacketRecv->viewerControlID))
{
ASSERT(!pPacketRecv->hostControlID);
CACancelQuery(pasController, FALSE);
DC_QUIT;
}
//
// If this person isn't in control of us or the control op referred to
// isn't the current one, ignore. NULL hostControlID means the person
// cancelled a request before they heard back from us.
//
if (pasController->m_caInControlOf != m_pasLocal)
{
WARNING_OUT(("Ignoring RELEASE CONTROL from [%d], we're not controlled by them",
pasController->mcsID));
DC_QUIT;
}
if (pPacketRecv->viewerControlID != pasController->m_caControlID)
{
WARNING_OUT(("Ignoring RELEASE CONTROL from [%d], viewer ID out of date",
pasController->mcsID, pPacketRecv->viewerControlID));
DC_QUIT;
}
if (pPacketRecv->hostControlID && (pPacketRecv->hostControlID != m_pasLocal->m_caControlID))
{
WARNING_OUT(("Ignoring RELEASE CONTROL from [%d], host ID out of date",
pasController->mcsID, pPacketRecv->hostControlID));
DC_QUIT;
}
// Undo control, but no packet gets sent, we're just cleaning up.
CA_RevokeControl(pasController, FALSE);
DC_EXIT_POINT:
DebugExitVOID(ASShare::CAHandleInformReleasedControl);
}
//
// CAHandleInformRevokedControl()
// WE are CONTROLLER, REMOTE is HOST
//
void ASShare::CAHandleInformRevokedControl
(
ASPerson * pasHost,
PCA_INFORM_PACKET pPacketRecv
)
{
DebugEntry(ASShare::CAHandleInformRevokedControl);
ValidatePerson(pasHost);
//
// Do we currently have a GiveControl dialog up for this request? If so,
// take it down but don't send a packet.
//
if (m_caQueryDlg &&
(m_caQuery.pasReplyTo == pasHost) &&
(m_caQuery.msg == CA_REQUEST_GIVECONTROL) &&
(m_caQuery.request.rgc.hostControlID == pPacketRecv->hostControlID))
{
ASSERT(!pPacketRecv->viewerControlID);
CACancelQuery(pasHost, FALSE);
DC_QUIT;
}
//
// If this person isn't controlled by us or the control op referred to
// isn't the current one, ignore.
//
if (pasHost->m_caControlledBy != m_pasLocal)
{
WARNING_OUT(("Ignoring REVOKE CONTROL from [%d], not in control of them",
pasHost->mcsID));
DC_QUIT;
}
if (pPacketRecv->hostControlID != pasHost->m_caControlID)
{
WARNING_OUT(("Ignoring REVOKE CONTROL from [%d], host ID out of date",
pasHost->mcsID, pPacketRecv->hostControlID));
DC_QUIT;
}
if (pPacketRecv->viewerControlID && (pPacketRecv->viewerControlID != m_pasLocal->m_caControlID))
{
WARNING_OUT(("Ignoring REVOKE CONTROL from [%d], viewer ID out of date",
pasHost->mcsID, pPacketRecv->viewerControlID));
DC_QUIT;
}
// Undo control, but no packet gets sent, we're just cleaning up.
CA_ReleaseControl(pasHost, FALSE);
DC_EXIT_POINT:
DebugExitVOID(ASShare::CAHandleInformRevokedControl);
}
//
// CAHandleInformPausedControl()
// WE are CONTROLLER, REMOTE is HOST
//
void ASShare::CAHandleInformPausedControl
(
ASPerson * pasHost,
PCA_INFORM_PACKET pPacketRecv
)
{
DebugEntry(ASShare::CAHandleInformPausedControl);
ValidatePerson(pasHost);
if (pasHost->m_caControlledBy != m_pasLocal)
{
WARNING_OUT(("Ignoring control paused from [%d], not controlled by us",
pasHost->mcsID));
DC_QUIT;
}
if (pasHost->m_caControlPaused)
{
WARNING_OUT(("Ignoring control paused from [%d], already paused",
pasHost->mcsID));
DC_QUIT;
}
pasHost->m_caControlPaused = TRUE;
VIEW_PausedInControl(pasHost, TRUE);
DCS_NotifyUI(SH_EVT_PAUSEDINCONTROL, pasHost->cpcCaps.share.gccID, 0);
DC_EXIT_POINT:
DebugExitVOID(ASShare::CAHandleInformPausedControl);
}
//
// CAHandleInformUnpausedControl()
// WE are CONTROLLER, REMOTE is HOST
//
void ASShare::CAHandleInformUnpausedControl
(
ASPerson * pasHost,
PCA_INFORM_PACKET pPacketRecv
)
{
DebugEntry(ASShare::CAHandleInformUnpausedControl);
ValidatePerson(pasHost);
if (pasHost->m_caControlledBy != m_pasLocal)
{
WARNING_OUT(("Ignoring control unpaused from [%d], not controlled by us",
pasHost->mcsID));
DC_QUIT;
}
if (!pasHost->m_caControlPaused)
{
WARNING_OUT(("Ignoring control unpaused from [%d], not paused",
pasHost->mcsID));
DC_QUIT;
}
pasHost->m_caControlPaused = FALSE;
VIEW_PausedInControl(pasHost, FALSE);
DCS_NotifyUI(SH_EVT_UNPAUSEDINCONTROL, pasHost->cpcCaps.share.gccID, 0);
DC_EXIT_POINT:
DebugExitVOID(ASShare::CAHandleInformUnpausedControl);
}
void ASShare::CAHandleNewState
(
ASPerson * pasHost,
PCANOTPACKET pPacket
)
{
BOOL caOldAllowControl;
BOOL caNewAllowControl;
ASPerson * pasController;
DebugEntry(ASShare::CAHandleNewState);
//
// If this node isn't hosting, ignore this.
//
ValidatePerson(pasHost);
ASSERT(pasHost->cpcCaps.general.version >= CAPS_VERSION_30);
ASSERT(pasHost->hetCount);
//
// Update controllable state FIRST, so view window changes will
// reflect it.
//
caOldAllowControl = pasHost->m_caAllowControl;
caNewAllowControl = ((pPacket->state & CASTATE_ALLOWCONTROL) != 0);
if (!caNewAllowControl && (pasHost->m_caControlledBy == m_pasLocal))
{
//
// Fix up bogus notification
//
ERROR_OUT(("CA_STATE notification error! We're in control of [%d] but he says he's not controllable.",
pasHost->mcsID));
CA_ReleaseControl(pasHost, FALSE);
}
pasHost->m_caAllowControl = caNewAllowControl;
// Update/clear controller
if (!pPacket->controllerID)
{
pasController = NULL;
}
else
{
pasController = SC_PersonFromNetID(pPacket->controllerID);
if (pasController == pasHost)
{
ERROR_OUT(("Bogus controller, same as host [%d]", pPacket->controllerID));
pasController = NULL;
}
}
if (!CAClearHostState(pasHost, pasController))
{
// This failed. Put back old controllable state.
pasHost->m_caAllowControl = caOldAllowControl;
}
// Force a state change if the allow state has altered
if (caOldAllowControl != pasHost->m_caAllowControl)
{
VIEW_HostStateChange(pasHost);
}
DebugExitVOID(ASShare::CAHandleNewState);
}
//
// CAStartWaiting()
// Sets up vars for waiting state.
//
void ASShare::CAStartWaiting
(
ASPerson * pasWaitForReplyFrom,
UINT msgWaitForReplyFrom
)
{
DebugEntry(ASShare::CAStartWaiting);
ValidatePerson(pasWaitForReplyFrom);
ASSERT(msgWaitForReplyFrom);
ASSERT(!m_caWaitingForReplyFrom);
ASSERT(!m_caWaitingForReplyMsg);
m_caWaitingForReplyFrom = pasWaitForReplyFrom;
m_caWaitingForReplyMsg = msgWaitForReplyFrom;
DebugExitVOID(ASShare::CAStartWaiting);
}
//
// CA_ClearLocalState()
//
// Called to reset control state for LOCAL dude.
//
void ASShare::CA_ClearLocalState
(
UINT flags,
ASPerson * pasRemote,
BOOL fPacket
)
{
DebugEntry(ASShare::CA_ClearLocalState);
//
// Clear HOST stuff
//
if (flags & CACLEAR_HOST)
{
if (m_caWaitingForReplyMsg == CA_REPLY_REQUEST_GIVECONTROL)
{
if (!pasRemote || (pasRemote == m_caWaitingForReplyFrom))
{
// Kill the outstanding invitation to the remote
CA_CancelGiveControl(m_caWaitingForReplyFrom, fPacket);
}
}
if (m_caQueryDlg &&
((m_caQuery.msg == CA_REQUEST_TAKECONTROL) ||
(m_caQuery.msg == CA_PREFER_PASSCONTROL)))
{
if (!pasRemote || (pasRemote == m_caQuery.pasReplyTo))
{
// Kill the user query dialog that's up
CACancelQuery(m_caQuery.pasReplyTo, fPacket);
}
}
if (m_pasLocal->m_caControlledBy)
{
if (!pasRemote || (pasRemote == m_pasLocal->m_caControlledBy))
{
CA_RevokeControl(m_pasLocal->m_caControlledBy, fPacket);
ASSERT(!m_pasLocal->m_caControlledBy);
}
}
}
//
// Clear VIEW stuff
//
if (flags & CACLEAR_VIEW)
{
if (m_caWaitingForReplyMsg == CA_REPLY_REQUEST_TAKECONTROL)
{
if (!pasRemote || (pasRemote == m_caWaitingForReplyFrom))
{
CA_CancelTakeControl(m_caWaitingForReplyFrom, fPacket);
}
}
if (m_caQueryDlg && (m_caQuery.msg == CA_REQUEST_GIVECONTROL))
{
if (!pasRemote || (pasRemote == m_caQuery.pasReplyTo))
{
// Kill the user query dialog that's up
CACancelQuery(m_caQuery.pasReplyTo, fPacket);
}
}
if (m_pasLocal->m_caInControlOf)
{
if (!pasRemote || (pasRemote == m_pasLocal->m_caInControlOf))
{
CA_ReleaseControl(m_pasLocal->m_caInControlOf, fPacket);
ASSERT(!m_pasLocal->m_caInControlOf);
}
}
}
DebugExitVOID(ASShare::CA_ClearLocalState);
}
//
// CAClearRemoteState()
//
// Called to reset all control state for a REMOTE node
//
void ASShare::CAClearRemoteState(ASPerson * pasClear)
{
DebugEntry(ASShare::CAClearRemoteState);
if (pasClear->m_caInControlOf)
{
CAClearHostState(pasClear->m_caInControlOf, NULL);
ASSERT(!pasClear->m_caInControlOf);
ASSERT(!pasClear->m_caControlledBy);
}
else if (pasClear->m_caControlledBy)
{
CAClearHostState(pasClear, NULL);
ASSERT(!pasClear->m_caControlledBy);
ASSERT(!pasClear->m_caInControlOf);
}
DebugExitVOID(ASShare:CAClearRemoteState);
}
//
// CAClearHostState()
//
// Called to clean up the mutual pointers when undoing a node's host state.
// We need to undo the previous states:
// * Clear the previous controller of the host
// * Clear the previous controller of the controller
// * Clear the previous controllee of the controller
//
// This may be recursive.
//
// It returns TRUE if the change takes effect, FALSE if it's ignored because
// it involves us and we have more recent information.
//
BOOL ASShare::CAClearHostState
(
ASPerson * pasHost,
ASPerson * pasController
)
{
BOOL rc = FALSE;
UINT gccID;
DebugEntry(ASShare::CAClearHostState);
ValidatePerson(pasHost);
//
// If nothing is changing, do nothing
//
if (pasHost->m_caControlledBy == pasController)
{
TRACE_OUT(("Ignoring control change; nothing's changing"));
rc = TRUE;
DC_QUIT;
}
//
// If the host is us, ignore.
// Also, if the host isn't hosting yet we got an in control change,
// ignore it too.
//
if ((pasHost == m_pasLocal) ||
(pasController && !pasHost->hetCount))
{
WARNING_OUT(("Ignoring control change; host is us or not sharing"));
DC_QUIT;
}
//
// UNDO any old state of the controller
//
if (pasController)
{
if (pasController == m_pasLocal)
{
TRACE_OUT(("Ignoring control with us as controller"));
DC_QUIT;
}
else if (pasController->m_caInControlOf)
{
ASSERT(!pasController->m_caControlledBy);
ASSERT(pasController->m_caInControlOf->m_caControlledBy == pasController);
rc = CAClearHostState(pasController->m_caInControlOf, NULL);
if (!rc)
{
DC_QUIT;
}
ASSERT(!pasController->m_caInControlOf);
}
else if (pasController->m_caControlledBy)
{
ASSERT(!pasController->m_caInControlOf);
ASSERT(pasController->m_caControlledBy->m_caInControlOf == pasController);
rc = CAClearHostState(pasController, NULL);
if (!rc)
{
DC_QUIT;
}
ASSERT(!pasController->m_caControlledBy);
}
}
//
// UNDO any old IN CONTROL state of the host
//
if (pasHost->m_caInControlOf)
{
ASSERT(!pasHost->m_caControlledBy);
ASSERT(pasHost->m_caInControlOf->m_caControlledBy == pasHost);
rc = CAClearHostState(pasHost->m_caInControlOf, NULL);
if (!rc)
{
DC_QUIT;
}
ASSERT(!pasHost->m_caInControlOf);
}
//
// FINALLY! Update CONTROLLED BY state of the host
//
// Clear OLD ControlledBy
if (pasHost->m_caControlledBy)
{
ASSERT(pasHost->m_caControlledBy->m_caInControlOf == pasHost);
pasHost->m_caControlledBy->m_caInControlOf = NULL;
}
// Set NEW ControlledBy
pasHost->m_caControlledBy = pasController;
if (pasController)
{
pasController->m_caInControlOf = pasHost;
gccID = pasController->cpcCaps.share.gccID;
}
else
{
gccID = 0;
}
VIEW_HostStateChange(pasHost);
//
// The hosts' controller has changed. Repaint the shadow cursor with/wo
// the new initials.
//
CM_UpdateShadowCursor(pasHost, pasHost->cmShadowOff, pasHost->cmPos.x,
pasHost->cmPos.y, pasHost->cmHotSpot.x, pasHost->cmHotSpot.y);
rc = TRUE;
DC_EXIT_POINT:
DebugExitBOOL(ASShare::CAClearHostState, rc);
return(rc);
}
//
// 2.X COMPATIBILITY STUFF
// This is so that we can do a decent job of reflecting old 2.x control
// stuff, and allow a 3.0 node to take control of a 2.x system.
//
//
// CA2xCooperateChange()
//
// This is called when a 2.x node is cooperating or not. When a 2.x node
// is a host and cooperating, he is "controllable" by 3.0 standards. So
// when he starts/stops hosting or starts/stops cooperating we must
// recalculate "AllowControl"
//
void ASShare::CA2xCooperateChange
(
ASPerson * pasPerson,
BOOL fCooperating
)
{
BOOL fAllowControl;
DebugEntry(ASShare::CA2xCooperateChange);
ValidatePerson(pasPerson);
//
// If this isn't a back level system, ignore it.
//
if (pasPerson->cpcCaps.general.version >= CAPS_VERSION_30)
{
WARNING_OUT(("Received old CA cooperate message from 3.0 node [%d]",
pasPerson->mcsID));
DC_QUIT;
}
//
// Update the cooperating state.
//
pasPerson->m_ca2xCooperating = fCooperating;
//
// If cooperating & this person owns the control token, this person
// is now in control of all 2.x cooperating nodes. If we were
// controlling a 2.x host, act like we've been bounced. But we MUST
// send a packet.
//
if (fCooperating)
{
if (pasPerson == m_ca2xControlTokenOwner)
{
//
// This person is now "in control" of the 2.x cooperating nodes.
// If we were in control of a 2.x host, we've basically been
// bounced and another 2.x node is running the show. With 3.0,
// it doesn't matter and we don't need to find out what's going
// on with a 3.0 node in control of 2.x dudes.
//
if (m_pasLocal->m_caInControlOf &&
(m_pasLocal->m_caInControlOf->cpcCaps.general.version < CAPS_VERSION_30))
{
CA_ReleaseControl(pasPerson, TRUE);
}
}
}
//
// Figure out whether we need to set/clear AllowControl
//
fAllowControl = (fCooperating && pasPerson->m_pView);
if (pasPerson->m_caAllowControl != fAllowControl)
{
if (pasPerson->m_pView && !fAllowControl)
{
//
// This 2.x node is hosting, and no longer is cooperating.
// Cleanup the controller
//
if (pasPerson->m_caControlledBy == m_pasLocal)
{
CA_ReleaseControl(pasPerson, TRUE);
}
else
{
CAClearHostState(pasPerson, NULL);
}
}
pasPerson->m_caAllowControl = fAllowControl;
// This will do nothing if this person isn't hosting.
VIEW_HostStateChange(pasPerson);
}
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA2xCooperateChange);
}
//
// CA2xRequestControl()
//
// Called when a 2.x node requests control.
//
void ASShare::CA2xRequestControl
(
ASPerson * pasPerson,
PCAPACKET pCAPacket
)
{
DebugEntry(ASShare::CA2xRequestControl);
//
// A 2.x node has sent this. 3.0 hosts never request, they simply
// grab control.
//
ValidatePerson(pasPerson);
//
// If it's from a 3.0 node, it's an error.
//
if (pasPerson->cpcCaps.general.version >= CAPS_VERSION_30)
{
ERROR_OUT(("Received CA_OLDMSG_REQUEST_CONTROL from 3.0 node [%d]",
pasPerson->mcsID));
DC_QUIT;
}
//
// If we have the token, grant it. We must release control of a host if
// that person is 2.x.
//
if (m_ca2xControlTokenOwner == m_pasLocal)
{
//
// In this case, we do NOT want a dest ID. This isn't us trying to
// take control of a 2.x host. It is simply granting control to
// a 2.x dude.
//
if (CA2xQueueSendMsg(0, CA_OLDMSG_GRANTED_CONTROL,
pasPerson->mcsID, m_ca2xControlGeneration))
{
m_ca2xControlTokenOwner = pasPerson;
// Release control of 2.x host.
if (m_pasLocal->m_caInControlOf &&
(m_pasLocal->m_caInControlOf->cpcCaps.general.version < CAPS_VERSION_30))
{
CA_ReleaseControl(m_pasLocal->m_caInControlOf, TRUE);
}
}
else
{
ERROR_OUT(("CA2xRequestControl: Unable to respond GRANTED to node [%d]",
pasPerson->mcsID));
}
}
DC_EXIT_POINT:
DebugExitVOID(ASShare::CA2xRequestControl);
}
//
// CA2xGrantedControl()
//
// Called when any node (2.x or 3.0 controlling 2.x) broadcasts granted
// control. If we are controlling a 2.x host, it is now nuked.
//
void ASShare::CA2xGrantedControl
(
ASPerson * pasPerson,
PCAPACKET pCAPacket
)
{
DebugEntry(ASShare::CA2xGrantedControl);
ValidatePerson(pasPerson);
if ((pCAPacket->data2 >= m_ca2xControlGeneration) ||
((m_ca2xControlGeneration - pCAPacket->data2) > 0x80000000))
{
ASPerson * pas2xNewTokenOwner;
//
// This dude is now the controller of 2.x nodes. Remember it for
// later COOPERATE msgs. If nothing has changed (this is a sync
// broadcast for example, do nothing ourselvs).
//
pas2xNewTokenOwner = SC_PersonFromNetID(pCAPacket->data1);
if (pas2xNewTokenOwner != m_ca2xControlTokenOwner)
{
m_ca2xControlTokenOwner = pas2xNewTokenOwner;
m_ca2xControlGeneration = pCAPacket->data2;
//
// Are we in control of a 2.x node? If so, undo it.
//
if (m_pasLocal->m_caInControlOf &&
(m_pasLocal->m_caInControlOf->cpcCaps.general.version < CAPS_VERSION_30))
{
CA_ReleaseControl(m_pasLocal->m_caInControlOf, TRUE);
}
}
}
DebugExitVOID(ASShare::CA2xGrantedControl);
}
//
// CA2xTakeControl()
//
// This fakes up packets to take control of a 2.x node. We don't broadcast,
// we send them privately just to the individual node so we don't control
// any other host but him.
//
// We do this by sending COOPERATE then GRANTED_CONTROL. If there's a
// collision, we'll see a GRANTED_CONTROL from somebody else that outdates
// ours.
//
void ASShare::CA2xTakeControl(ASPerson * pasHost)
{
UINT_PTR caNew2xControlGeneration;
DebugEntry(ASShare::CA2xTakeControl);
ValidateView(pasHost);
caNew2xControlGeneration = m_ca2xControlGeneration + m_pasLocal->mcsID;
if (CA2xQueueSendMsg(0, CA_OLDMSG_COOPERATE, 0, 0))
{
if (!CA2xQueueSendMsg(pasHost->mcsID, CA_OLDMSG_GRANTED_CONTROL,
m_pasLocal->mcsID, caNew2xControlGeneration))
{
//
// Failure. Best we can do is follow it with a DETACH
//
ERROR_OUT(("CA2xTakeControl: Can't take control of [%d]", pasHost->mcsID));
CA2xQueueSendMsg(0, CA_OLDMSG_DETACH, 0, 0);
}
else
{
m_ca2xControlGeneration = caNew2xControlGeneration;
m_ca2xControlTokenOwner = m_pasLocal;
CANewRequestID();
CAStartInControl(pasHost, 1);
}
}
else
{
ERROR_OUT(("CA2xTakeControl: Can't take control of [%d]", pasHost->mcsID));
}
DebugExitVOID(ASShare::CA2xTakeControl);
}
//
// CA2xSendMsg()
// This sends a 2.x node CA message. It returns FALSE if it can't alloc
// a packet.
//
BOOL ASShare::CA2xSendMsg
(
UINT_PTR destID,
UINT msg,
UINT_PTR data1,
UINT_PTR data2
)
{
BOOL fSent = FALSE;
PCAPACKET pPacket;
#ifdef _DEBUG
UINT sentSize;
#endif // _DEBUG
DebugEntry(ASShare::CASendPacket);
//
// For cooperate/detach, there's no target. We broadcast them no
// matter what so everybody knows what state we're in.
//
if (msg != CA_OLDMSG_GRANTED_CONTROL)
{
ASSERT(!destID);
}
//
// WE MUST USE PROT_STR_MISC! Backlevel nodes will uncompress it
// using that prot dictionary. And note that we must broadcast 2.x
// CA packets so everybody knows what's going on.
//
pPacket = (PCAPACKET)SC_AllocPkt(PROT_STR_MISC, g_s20BroadcastID,
sizeof(*pPacket));
if (!pPacket)
{
WARNING_OUT(("CA2xSendMsg: can't get packet to send"));
WARNING_OUT((" msg 0x%08x", msg));
WARNING_OUT((" data1 0x%08x", data1));
WARNING_OUT((" data2 0x%08x", data2));
DC_QUIT;
}
pPacket->header.data.dataType = DT_CA;
pPacket->msg = (TSHR_UINT16)msg;
pPacket->data1 = (TSHR_UINT16)data1;
pPacket->data2 = data2;
#ifdef _DEBUG
sentSize =
#endif
DCS_CompressAndSendPacket(PROT_STR_MISC, g_s20BroadcastID,
&(pPacket->header), sizeof(*pPacket));
TRACE_OUT(("CA request packet size: %08d, sent %08d", sizeof(*pPacket), sentSize));
fSent = TRUE;
DC_EXIT_POINT:
DebugExitBOOL(ASShare::CA2xSendMsg, fSent);
return(fSent);
}
//
// CA2xQueueSendMsg()
// This sends (or queues if failure) a 2.x node CA message. It has different
// fields, hence a different routine.
//
BOOL ASShare::CA2xQueueSendMsg
(
UINT_PTR destID,
UINT msg,
UINT_PTR data1,
UINT_PTR data2
)
{
BOOL rc = TRUE;
PCAREQUEST pCARequest;
DebugEntry(ASShare::CA2xQueueSendMsg);
if (msg != CA_OLDMSG_GRANTED_CONTROL)
{
ASSERT(!destID);
}
//
// A DETACH message will cancel out a pending GRANTED_CONTROL message.
// So look for that first. If we find one (and there can only be at
// most one), replace it.
//
if (msg == CA_OLDMSG_DETACH)
{
pCARequest = (PCAREQUEST)COM_BasedListFirst(&m_caQueuedMsgs,
FIELD_OFFSET(CAREQUEST, chain));
while (pCARequest)
{
if ((pCARequest->type == REQUEST_2X) &&
(pCARequest->destID == destID) &&
(pCARequest->msg == CA_OLDMSG_GRANTED_CONTROL))
{
// Replace it
WARNING_OUT(("Replacing cancelled GRANTED_CONTROL msg to 2.x host"));
pCARequest->destID = 0;
pCARequest->msg = CA_OLDMSG_DETACH;
pCARequest->req.req2x.data1 = 0;
pCARequest->req.req2x.data2 = 0;
// We're done.
DC_QUIT;
}
pCARequest = (PCAREQUEST)COM_BasedListNext(&m_caQueuedMsgs, pCARequest,
FIELD_OFFSET(CAREQUEST, chain));
}
}
//
// The messages must go out in order. So we must flush pending
// queued messages first.
//
if (!CAFlushOutgoingPackets() ||
!CA2xSendMsg(destID, msg, data1, data2))
{
//
// We must queue this.
//
WARNING_OUT(("CA2xQueueSendMsg: queueing request for send later"));
pCARequest = new CAREQUEST;
if (!pCARequest)
{
ERROR_OUT(("CA2xQueueSendMsg: can't even allocate memory to queue request; must fail"));
rc = FALSE;
}
else
{
SET_STAMP(pCARequest, CAREQUEST);
pCARequest->type = REQUEST_2X;
pCARequest->destID = destID;
pCARequest->msg = msg;
pCARequest->req.req2x.data1 = data1;
pCARequest->req.req2x.data2 = data2;
//
// Stick this at the end of the queue
//
COM_BasedListInsertBefore(&(m_caQueuedMsgs),
&(pCARequest->chain));
}
}
DC_EXIT_POINT:
DebugExitBOOL(ASShare::CA2xQueueSendMsg, rc);
return(rc);
}
//
// CAStartQuery()
//
// This puts up the modeless dialog to query the user about a control
// request. It will timeout if not handled.
//
BOOL ASShare::CAStartQuery
(
ASPerson * pasFrom,
UINT msg,
PCA30P pReq
)
{
BOOL rc = FALSE;
DebugEntry(ASShare::CAStartQuery);
ValidatePerson(pasFrom);
//
// We have no stacked queries. If another comes in while the current
// one is up, it gets an immediate failure busy.
//
ASSERT(!m_caQueryDlg);
ASSERT(!m_caQuery.pasReplyTo);
ASSERT(!m_caQuery.msg);
//
// Setup for new query
//
if (msg == CA_PREFER_PASSCONTROL)
{
//
// With forwarding, the person we're going to send a packet to
// if accepted is not the person who sent us the request. It's the
// person we're forwarding to.
//
m_caQuery.pasReplyTo = SC_PersonFromNetID(pReq->ppc.mcsPassTo);
ValidatePerson(m_caQuery.pasReplyTo);
}
else
{
m_caQuery.pasReplyTo = pasFrom;
}
m_caQuery.mcsOrg = pasFrom->mcsID;
m_caQuery.msg = msg;
m_caQuery.request = *pReq;
//
// If we are unattended, or the requester is unattended, instantly
// confirm. That's why we show the window after creating the dialog.
//
if ((m_pasLocal->cpcCaps.general.typeFlags & AS_UNATTENDED) ||
(pasFrom->cpcCaps.general.typeFlags & AS_UNATTENDED))
{
CAFinishQuery(CARESULT_CONFIRMED);
rc = TRUE;
}
else
{
//
// If this is a request to us && we're hosting, check auto-accept/
// auto-reject settings.
//
if (m_pHost &&
((msg == CA_REQUEST_TAKECONTROL) || (msg == CA_PREFER_PASSCONTROL)))
{
if (m_pHost->m_caTempRejectRequests)
{
CAFinishQuery(CARESULT_DENIED_BUSY);
rc = TRUE;
DC_QUIT;
}
else if (m_pHost->m_caAutoAcceptRequests)
{
CAFinishQuery(CARESULT_CONFIRMED);
rc = TRUE;
DC_QUIT;
}
}
m_caQueryDlg = CreateDialogParam(g_asInstance,
MAKEINTRESOURCE(IDD_QUERY), NULL, CAQueryDlgProc, 0);
if (!m_caQueryDlg)
{
ERROR_OUT(("Failed to create query message box from [%d]",
pasFrom->mcsID));
m_caQuery.pasReplyTo = NULL;
m_caQuery.mcsOrg = 0;
m_caQuery.msg = 0;
}
else
{
// Success
rc = TRUE;
}
}
DC_EXIT_POINT:
DebugExitBOOL(ASShare::CAStartQuery, rc);
return(rc);
}
//
// CAFinishQuery()
//
// Called to finish the query we started, either because of UI or because
// we or the remote are unattended.
//
void ASShare::CAFinishQuery(UINT result)
{
CA30PENDING request;
DebugEntry(ASShare::CAFinishQuery);
ValidatePerson(m_caQuery.pasReplyTo);
// Make a copy of our request
request = m_caQuery;
//
// If we have a dialog up, destroy it NOW. Completing the request
// may cause us to be controlled or whatever. So get the dialog
// out of the way immediately.
//
// Note that destroying ourself will clear the request vars, hence the
// copy above.
//
if (m_caQueryDlg)
{
DestroyWindow(m_caQueryDlg);
}
else
{
m_caQuery.pasReplyTo = NULL;
m_caQuery.mcsOrg = 0;
m_caQuery.msg = 0;
}
switch (request.msg)
{
case CA_REQUEST_TAKECONTROL:
{
CACompleteRequestTakeControl(request.pasReplyTo,
&request.request.rtc, result);
break;
}
case CA_REQUEST_GIVECONTROL:
{
CACompleteRequestGiveControl(request.pasReplyTo,
&request.request.rgc, result);
break;
}
case CA_PREFER_PASSCONTROL:
{
CACompletePreferPassControl(request.pasReplyTo,
request.mcsOrg, &request.request.ppc, result);
break;
}
default:
{
ERROR_OUT(("Unrecognized query msg %d", request.msg));
break;
}
}
DebugExitVOID(ASShare::CAFinishQuery);
}
//
// CA_QueryDlgProc()
//
// Handles querying user dialog
//
INT_PTR CALLBACK CAQueryDlgProc
(
HWND hwnd,
UINT message,
WPARAM wParam,
LPARAM lParam
)
{
return(g_asSession.pShare->CA_QueryDlgProc(hwnd, message, wParam, lParam));
}
BOOL ASShare::CA_QueryDlgProc
(
HWND hwnd,
UINT message,
WPARAM wParam,
LPARAM lParam
)
{
BOOL rc = TRUE;
DebugEntry(CA_QueryDlgProc);
switch (message)
{
case WM_INITDIALOG:
{
char szT[256];
char szRes[512];
char szShared[64];
UINT idsTitle;
ASPerson * pasT;
HDC hdc;
HFONT hfn;
RECT rcTxt;
RECT rcOwner;
ValidatePerson(m_caQuery.pasReplyTo);
pasT = NULL;
// Set title.
ASSERT(m_caQuery.msg);
switch (m_caQuery.msg)
{
case CA_REQUEST_TAKECONTROL:
{
idsTitle = IDS_TITLE_QUERY_TAKECONTROL;
if (m_pasLocal->hetCount == HET_DESKTOPSHARED)
LoadString(g_asInstance, IDS_DESKTOP_LOWER, szShared, sizeof(szShared));
else
LoadString(g_asInstance, IDS_PROGRAMS_LOWER, szShared, sizeof(szShared));
LoadString(g_asInstance, IDS_MSG_QUERY_TAKECONTROL, szT, sizeof(szT));
wsprintf(szRes, szT, m_caQuery.pasReplyTo->scName, szShared);
break;
}
case CA_REQUEST_GIVECONTROL:
{
if (m_caQuery.pasReplyTo->hetCount == HET_DESKTOPSHARED)
LoadString(g_asInstance, IDS_DESKTOP_LOWER, szShared, sizeof(szShared));
else
LoadString(g_asInstance, IDS_PROGRAMS_LOWER, szShared, sizeof(szShared));
if (m_caQuery.request.rgc.mcsPassFrom)
{
pasT = SC_PersonFromNetID(m_caQuery.request.rgc.mcsPassFrom);
}
if (pasT)
{
idsTitle = IDS_TITLE_QUERY_YIELDCONTROL;
LoadString(g_asInstance, IDS_MSG_QUERY_YIELDCONTROL,
szT, sizeof(szT));
wsprintf(szRes, szT, pasT->scName, m_caQuery.pasReplyTo->scName, szShared);
}
else
{
idsTitle = IDS_TITLE_QUERY_GIVECONTROL;
LoadString(g_asInstance, IDS_MSG_QUERY_GIVECONTROL,
szT, sizeof(szT));
wsprintf(szRes, szT, m_caQuery.pasReplyTo->scName, szShared);
}
break;
}
case CA_PREFER_PASSCONTROL:
{
pasT = SC_PersonFromNetID(m_caQuery.mcsOrg);
ValidatePerson(pasT);
idsTitle = IDS_TITLE_QUERY_FORWARDCONTROL;
if (m_pasLocal->hetCount == HET_DESKTOPSHARED)
LoadString(g_asInstance, IDS_DESKTOP_LOWER, szShared, sizeof(szShared));
else
LoadString(g_asInstance, IDS_PROGRAMS_LOWER, szShared, sizeof(szShared));
LoadString(g_asInstance, IDS_MSG_QUERY_FORWARDCONTROL, szT, sizeof(szT));
wsprintf(szRes, szT, pasT->scName, szShared, m_caQuery.pasReplyTo->scName);
break;
}
default:
{
ERROR_OUT(("Bogus m_caQuery.msg %d", m_caQuery.msg));
rc = FALSE;
break;
}
}
if(FALSE == rc)
{
break;
}
LoadString(g_asInstance, idsTitle, szT, sizeof(szT));
SetWindowText(hwnd, szT);
// Set message.
SetDlgItemText(hwnd, CTRL_QUERY, szRes);
// Center the message vertically
GetWindowRect(GetDlgItem(hwnd, CTRL_QUERY), &rcOwner);
MapWindowPoints(NULL, hwnd, (LPPOINT)&rcOwner, 2);
rcTxt = rcOwner;
hdc = GetDC(hwnd);
hfn = (HFONT)SendDlgItemMessage(hwnd, CTRL_QUERY, WM_GETFONT, 0, 0);
hfn = SelectFont(hdc, hfn);
DrawText(hdc, szRes, -1, &rcTxt, DT_NOCLIP | DT_EXPANDTABS |
DT_NOPREFIX | DT_WORDBREAK | DT_CALCRECT);
SelectFont(hdc, hfn);
ReleaseDC(hwnd, hdc);
ASSERT((rcTxt.bottom - rcTxt.top) <= (rcOwner.bottom - rcOwner.top));
SetWindowPos(GetDlgItem(hwnd, CTRL_QUERY), NULL,
rcOwner.left,
((rcOwner.top + rcOwner.bottom) - (rcTxt.bottom - rcTxt.top)) / 2,
(rcOwner.right - rcOwner.left),
rcTxt.bottom - rcTxt.top,
SWP_NOACTIVATE | SWP_NOZORDER);
SetTimer(hwnd, IDT_CAQUERY, PERIOD_CAQUERY, 0);
//
// Show window, the user will handle
//
ShowWindow(hwnd, SW_SHOWNORMAL);
SetForegroundWindow(hwnd);
UpdateWindow(hwnd);
break;
}
case WM_COMMAND:
{
switch (GET_WM_COMMAND_ID(wParam, lParam))
{
case IDOK:
{
CAFinishQuery(CARESULT_CONFIRMED);
break;
}
case IDCANCEL:
{
CAFinishQuery(CARESULT_DENIED_USER);
break;
}
}
break;
}
case WM_TIMER:
{
if (wParam != IDT_CAQUERY)
{
rc = FALSE;
}
else
{
KillTimer(hwnd, IDT_CAQUERY);
// Timed out failure.
CAFinishQuery(CARESULT_DENIED_TIMEDOUT);
}
break;
}
case WM_DESTROY:
{
//
// Clear pending info
//
m_caQueryDlg = NULL;
m_caQuery.pasReplyTo = NULL;
m_caQuery.mcsOrg = 0;
m_caQuery.msg = 0;
break;
}
default:
{
rc = FALSE;
break;
}
}
DebugExitBOOL(CA_QueryDlgProc, rc);
return(rc);
}
//
// CACancelQuery()
//
// If a dialog is up for a take control request, it hasn't been handled yet,
// and we get a cancel notification from the viewer, we need to take the
// dialog down WITHOUT generating a response packet.
//
void ASShare::CACancelQuery
(
ASPerson * pasFrom,
BOOL fPacket
)
{
DebugEntry(ASShare::CACancelQuery);
ASSERT(m_caQueryDlg);
ASSERT(m_caQuery.pasReplyTo == pasFrom);
if (fPacket)
{
// This will send a packet then destroy the dialog
CAFinishQuery(CARESULT_DENIED);
}
else
{
// Destroy the dialog
DestroyWindow(m_caQueryDlg);
}
ASSERT(!m_caQueryDlg);
ASSERT(!m_caQuery.pasReplyTo);
ASSERT(!m_caQuery.msg);
DebugExitVOID(ASShare::CACancelQuery);
}