void CNetDDESvrApp::OnDDEDestroyConversation(CNetDDESvrSocket& oConnection, CNetDDEPacket& oReqPacket)
{
ASSERT(oReqPacket.DataType() == CNetDDEPacket::DDE_DESTROY_CONVERSATION);
HCONV hConv;
uint32 nConvID;
// Decode message.
CMemStream oStream(oReqPacket.Buffer());
oStream.Open();
oStream.Seek(sizeof(CNetDDEPacket::Header));
oStream.Read(&hConv, sizeof(hConv));
oStream >> nConvID;
oStream.Close();
if (App.m_bTraceConvs)
App.Trace(TXT("DDE_DESTROY_CONVERSATION: 0x%p [#%u]"), hConv, nConvID);
// Locate the conversation.
CDDECltConv* pConv = m_pDDEClient->FindConversation(hConv);
if (pConv != NULL)
{
CNetDDEConv* pNetConv = oConnection.FindNetConv(pConv, nConvID);
ASSERT(pNetConv != NULL);
try
{
// Not final reference?
if (pNetConv->m_pSvrConv->RefCount() != 1)
{
// Destroy NetDDE conversations' links.
for (size_t i = 0; i < pNetConv->m_aoLinks.Size(); ++i)
pConv->DestroyLink(pNetConv->m_aoLinks[i]);
}
// Purge link cache, if last reference.
if (pNetConv->m_pSvrConv->RefCount() == 1)
m_oLinkCache.Purge(pConv);
// Call DDE to terminate the conversation.
m_pDDEClient->DestroyConversation(pConv);
}
catch (CDDEException& e)
{
App.Trace(TXT("DDE_ERROR: %s"), e.twhat());
}
// Detach from the connection.
oConnection.m_aoNetConvs.Delete(oConnection.m_aoNetConvs.Find(pNetConv));
}
}
void CNetDDESvrApp::OnDDEStopAdvise(CNetDDESvrSocket& oConnection, CNetDDEPacket& oReqPacket)
{
ASSERT(oReqPacket.DataType() == CNetDDEPacket::DDE_STOP_ADVISE);
HCONV hConv;
uint32 nConvID;
CString strItem;
uint32 nFormat;
// Decode message.
CMemStream oStream(oReqPacket.Buffer());
oStream.Open();
oStream.Seek(sizeof(CNetDDEPacket::Header));
oStream.Read(&hConv, sizeof(hConv));
oStream >> nConvID;
oStream >> strItem;
oStream >> nFormat;
oStream.Close();
if (App.m_bTraceAdvises)
App.Trace(TXT("DDE_STOP_ADVISE: %s %s"), strItem, CClipboard::FormatName(nFormat));
// Locate the conversation.
CDDECltConv* pConv = m_pDDEClient->FindConversation(hConv);
if (pConv != NULL)
{
// Locate the link. (May not exist, if async advised).
CDDELink* pLink = pConv->FindLink(strItem, nFormat);
if (pLink != NULL)
{
CNetDDEConv* pNetConv = oConnection.FindNetConv(pConv, nConvID);
ASSERT(pNetConv != NULL);
try
{
// Call DDE to destroy the link.
pConv->DestroyLink(pLink);
}
catch (CDDEException& e)
{
App.Trace(TXT("DDE_ERROR: %s"), e.twhat());
}
// Detach from the connection.
pNetConv->m_aoLinks.Remove(pNetConv->m_aoLinks.Find(pLink));
}
}
}
DDE::IDDECltConv* CDDEClient::FindConversation(HCONV hConv) const
{
// Search the conversation list.
for (size_t i = 0, n = m_aoConvs.size(); i != n; ++i)
{
CDDECltConv* pConv = static_cast<CDDECltConv*>(m_aoConvs[i]);
if (pConv->Handle() == hConv)
return pConv;
}
return nullptr;
}
void CDDEClient::OnAdvise(HCONV hConv, const tchar* /*pszTopic*/, const tchar* pszItem, uint nFormat, const CDDEData* pData)
{
// Find the conversation for the handle.
CDDECltConv* pConv = static_cast<CDDECltConv*>(FindConversation(hConv));
ASSERT(pConv != nullptr);
// Find the link.
CDDELink* pLink = pConv->FindLink(pszItem, nFormat);
// May still be in the Advise Start.
if (pLink == nullptr)
{
// TRACE3("OnAdvise('%s|%s', '%s') - Failed to find link\n", pConv->Service(), pConv->Topic(), pszItem);
return;
}
for (size_t i = 0, n = m_aoListeners.size(); i != n; ++i)
m_aoListeners[i]->OnAdvise(pLink, pData);
}
void CDDEClient::DestroyConversation(DDE::IDDECltConv* pIConv)
{
ASSERT(pIConv != nullptr);
ASSERT(std::find(m_aoConvs.begin(), m_aoConvs.end(), pIConv) != m_aoConvs.end());
CDDECltConv* pConv = static_cast<CDDECltConv*>(pIConv);
// Last reference?
if (--pConv->m_nRefCount == 0)
{
// Disconnect from service/topic.
pConv->Disconnect();
// Remove from collection.
m_aoConvs.erase(std::find(m_aoConvs.begin(), m_aoConvs.end(), pConv));
// Delete conversation.
delete pConv;
}
}
void CNetDDESvrApp::OnDDECreateConversation(CNetDDESvrSocket& oConnection, CNetDDEPacket& oReqPacket)
{
ASSERT(oReqPacket.DataType() == CNetDDEPacket::DDE_CREATE_CONVERSATION);
bool bResult = false;
CString strService;
CString strTopic;
HCONV hConv = NULL;
uint32 nConvID = m_nNextConvID++;
// Decode request message.
CMemStream oReqStream(oReqPacket.Buffer());
oReqStream.Open();
oReqStream.Seek(sizeof(CNetDDEPacket::Header));
oReqStream >> strService;
oReqStream >> strTopic;
oReqStream.Close();
if (App.m_bTraceConvs)
App.Trace(TXT("DDE_CREATE_CONVERSATION: %s %s [#%u]"), strService, strTopic, nConvID);
try
{
// Call DDE to create the conversation.
CDDECltConv* pConv = m_pDDEClient->CreateConversation(strService, strTopic);
bResult = true;
hConv = pConv->Handle();
// Attach to the connection.
oConnection.m_aoNetConvs.Add(new CNetDDEConv(pConv, nConvID));
// Apply settings.
pConv->SetTimeout(App.m_nDDETimeOut);
}
catch (CDDEException& e)
{
App.Trace(TXT("DDE_ERROR: %s"), e.twhat());
}
// Create response message.
CBuffer oRspBuffer;
CMemStream oRspStream(oRspBuffer);
oRspStream.Create();
oRspStream << bResult;
oRspStream.Write(&hConv, sizeof(hConv));
oRspStream << nConvID;
oRspStream.Close();
// Send response message.
CNetDDEPacket oRspPacket(CNetDDEPacket::DDE_CREATE_CONVERSATION, oReqPacket.PacketID(), oRspBuffer);
oConnection.SendPacket(oRspPacket);
// Update stats.
++m_nPktsSent;
}
void CNetDDESvrApp::OnDDEPoke(CNetDDESvrSocket& oConnection, CNetDDEPacket& oReqPacket)
{
ASSERT(oReqPacket.DataType() == CNetDDEPacket::DDE_POKE);
bool bResult = false;
HCONV hConv;
uint32 nConvID;
CString strItem;
uint32 nFormat;
CBuffer oData;
// Decode message.
CMemStream oStream(oReqPacket.Buffer());
oStream.Open();
oStream.Seek(sizeof(CNetDDEPacket::Header));
oStream.Read(&hConv, sizeof(hConv));
oStream >> nConvID;
oStream >> strItem;
oStream >> nFormat;
oStream >> oData;
oStream.Close();
if (App.m_bTraceRequests)
{
CString strData;
if (nFormat == CF_TEXT)
strData = oData.ToString(ANSI_TEXT);
else if (nFormat == CF_UNICODETEXT)
strData = oData.ToString(UNICODE_TEXT);
else
strData = CClipboard::FormatName(nFormat);
App.Trace(TXT("DDE_POKE: %s %s [%s]"), strItem, CClipboard::FormatName(nFormat), strData);
}
try
{
// Locate the conversation.
CDDECltConv* pConv = m_pDDEClient->FindConversation(hConv);
if (pConv != NULL)
{
// Call DDE to do the poke.
pConv->Poke(strItem, nFormat, oData.Buffer(), oData.Size());
bResult = true;
}
}
catch (CDDEException& e)
{
App.Trace(TXT("DDE_ERROR: %s"), e.twhat());
}
// Create response message.
CBuffer oRspBuffer;
CMemStream oRspStream(oRspBuffer);
oRspStream.Create();
oRspStream << bResult;
oRspStream.Close();
// Send response message.
CNetDDEPacket oRspPacket(CNetDDEPacket::DDE_POKE, oReqPacket.PacketID(), oRspBuffer);
oConnection.SendPacket(oRspPacket);
// Update stats.
++m_nPktsSent;
}
void CNetDDESvrApp::OnDDEExecute(CNetDDESvrSocket& oConnection, CNetDDEPacket& oReqPacket)
{
ASSERT(oReqPacket.DataType() == CNetDDEPacket::DDE_EXECUTE);
bool bResult = false;
HCONV hConv;
uint32 nConvID;
CString strCmd;
// Decode message.
CMemStream oStream(oReqPacket.Buffer());
oStream.Open();
oStream.Seek(sizeof(CNetDDEPacket::Header));
oStream.Read(&hConv, sizeof(hConv));
oStream >> nConvID;
oStream >> strCmd;
oStream.Close();
if (App.m_bTraceRequests)
App.Trace(TXT("DDE_EXECUTE: 0x%p [%s]"), hConv, strCmd);
try
{
// Locate the conversation.
CDDECltConv* pConv = m_pDDEClient->FindConversation(hConv);
if (pConv != NULL)
{
// Call DDE to do the execute.
pConv->ExecuteString(strCmd);
bResult = true;
}
}
catch (CDDEException& e)
{
App.Trace(TXT("DDE_ERROR: %s"), e.twhat());
}
// Create response message.
CBuffer oRspBuffer;
CMemStream oRspStream(oRspBuffer);
oRspStream.Create();
oRspStream << bResult;
oRspStream.Close();
// Send response message.
CNetDDEPacket oRspPacket(CNetDDEPacket::DDE_EXECUTE, oReqPacket.PacketID(), oRspBuffer);
oConnection.SendPacket(oRspPacket);
// Update stats.
++m_nPktsSent;
}
void CNetDDESvrApp::OnDDEStartAdvise(CNetDDESvrSocket& oConnection, CNetDDEPacket& oReqPacket)
{
ASSERT(oReqPacket.DataType() == CNetDDEPacket::DDE_START_ADVISE);
bool bResult = false;
CDDECltConv* pConv = NULL;
CDDELink* pLink = NULL;
HCONV hConv;
uint32 nConvID;
CString strItem;
uint32 nFormat;
bool bAsync;
bool bReqVal;
// Decode message.
CMemStream oStream(oReqPacket.Buffer());
oStream.Open();
oStream.Seek(sizeof(CNetDDEPacket::Header));
oStream.Read(&hConv, sizeof(hConv));
oStream >> nConvID;
oStream >> strItem;
oStream >> nFormat;
oStream >> bAsync;
oStream >> bReqVal;
oStream.Close();
if (App.m_bTraceAdvises)
App.Trace(TXT("DDE_START_ADVISE: %s %s %s"), strItem, CClipboard::FormatName(nFormat), (bAsync) ? TXT("[ASYNC]") : TXT(""));
try
{
// Locate the conversation.
pConv = m_pDDEClient->FindConversation(hConv);
if (pConv != NULL)
{
CNetDDEConv* pNetConv = oConnection.FindNetConv(pConv, nConvID);
ASSERT(pNetConv != NULL);
// Call DDE to create the link.
pLink = pConv->CreateLink(strItem, nFormat);
// Attach to the connection.
pNetConv->m_aoLinks.Add(pLink);
bResult = true;
}
}
catch (CDDEException& e)
{
App.Trace(TXT("DDE_ERROR: %s"), e.twhat());
}
// Sync advise start?
if (!bAsync)
{
// Create response message.
CBuffer oRspBuffer;
CMemStream oRspStream(oRspBuffer);
oRspStream.Create();
oRspStream << bResult;
oRspStream.Close();
// Send response message.
CNetDDEPacket oRspPacket(CNetDDEPacket::DDE_START_ADVISE, oReqPacket.PacketID(), oRspBuffer);
oConnection.SendPacket(oRspPacket);
// Update stats.
++m_nPktsSent;
}
// Failed async advise start?
if ((bAsync) && (!bResult))
{
// Create response message.
CBuffer oRspBuffer;
CMemStream oRspStream(oRspBuffer);
oRspStream.Create();
oRspStream.Write(&hConv, sizeof(hConv));
oRspStream << strItem;
oRspStream << nFormat;
oRspStream << true;
oRspStream.Close();
// Send response message.
CNetDDEPacket oRspPacket(CNetDDEPacket::DDE_START_ADVISE_FAILED, oRspBuffer);
oConnection.SendPacket(oRspPacket);
// Update stats.
++m_nPktsSent;
}
CLinkValue* pLinkValue = NULL;
// Link established AND 1st link AND need to request value?
if ( (bResult) && (pLink->RefCount() == 1) && (bReqVal) )
{
try
{
// Request links current value.
CDDEData oData = pConv->Request(strItem, nFormat);
// Find the links' value cache.
if ((pLinkValue = m_oLinkCache.Find(pConv, pLink)) == NULL)
pLinkValue = m_oLinkCache.Create(pConv, pLink);
ASSERT(pLinkValue != NULL);
// Update links' value cache.
pLinkValue->m_oLastValue = oData.GetBuffer();;
pLinkValue->m_tLastUpdate = CDateTime::Current();
}
catch (CDDEException& e)
{
App.Trace(TXT("DDE_ERROR: %s"), e.twhat());
}
}
// Link established AND not 1st real link?
else if ( (bResult) && (pLink->RefCount() > 1) )
{
// Find last advise value.
pLinkValue = m_oLinkCache.Find(pConv, pLink);
}
// Send initial advise?
if (pLinkValue != NULL)
{
CBuffer oBuffer;
CMemStream oStream(oBuffer);
oStream.Create();
oStream.Write(&hConv, sizeof(hConv));
oStream << strItem;
oStream << nFormat;
oStream << pLinkValue->m_oLastValue;
oStream << true;
oStream.Close();
CNetDDEPacket oPacket(CNetDDEPacket::DDE_ADVISE, oBuffer);
// Send links' last advise data.
oConnection.SendPacket(oPacket);
// Update stats.
++m_nPktsSent;
if (App.m_bTraceUpdates)
{
CString strData;
if (nFormat == CF_TEXT)
strData = pLinkValue->m_oLastValue.ToString(ANSI_TEXT);
else if (nFormat == CF_UNICODETEXT)
strData = pLinkValue->m_oLastValue.ToString(UNICODE_TEXT);
else
strData = CClipboard::FormatName(nFormat);
App.Trace(TXT("DDE_ADVISE: %s %u"), strItem, nFormat);
}
}
}
void CNetDDESvrApp::OnDDERequest(CNetDDESvrSocket& oConnection, CNetDDEPacket& oReqPacket)
{
ASSERT(oReqPacket.DataType() == CNetDDEPacket::DDE_REQUEST);
bool bResult = false;
HCONV hConv;
uint32 nConvID;
CString strItem;
uint32 nFormat;
CBuffer oBuffer;
// Decode message.
CMemStream oStream(oReqPacket.Buffer());
oStream.Open();
oStream.Seek(sizeof(CNetDDEPacket::Header));
oStream.Read(&hConv, sizeof(hConv));
oStream >> nConvID;
oStream >> strItem;
oStream >> nFormat;
oStream.Close();
if (App.m_bTraceRequests)
App.Trace(TXT("DDE_REQUEST: %s %s"), strItem, CClipboard::FormatName(nFormat));
try
{
// Locate the conversation.
CDDECltConv* pConv = m_pDDEClient->FindConversation(hConv);
if (pConv != NULL)
{
// Call DDE to make the request.
CDDEData oData = pConv->Request(strItem, nFormat);
oBuffer = oData.GetBuffer();
bResult = true;
}
}
catch (CDDEException& e)
{
App.Trace(TXT("DDE_ERROR: %s"), e.twhat());
}
// Create response message.
CBuffer oRspBuffer;
CMemStream oRspStream(oRspBuffer);
oRspStream.Create();
oRspStream << bResult;
oRspStream << oBuffer;
oRspStream.Close();
// Send response message.
CNetDDEPacket oRspPacket(CNetDDEPacket::DDE_REQUEST, oReqPacket.PacketID(), oRspBuffer);
oConnection.SendPacket(oRspPacket);
// Update stats.
++m_nPktsSent;
}
