/***************************************************************************\
* DdeImpersonateClient()
*
* Description:
* Does security impersonation for DDEML server apps.
* This API should only be called with server side hConvs;
*
* History:
* 5-4-92 sanfords Created.
\***************************************************************************/
BOOL DdeImpersonateClient(
HCONV hConv)
{
PCONV_INFO pcoi;
PCL_INSTANCE_INFO pcii;
BOOL fRet = FALSE;
EnterDDECrit;
pcoi = (PCONV_INFO)ValidateCHandle((HANDLE)hConv,
HTYPE_SERVER_CONVERSATION, HINST_ANY);
if (pcoi == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
pcii = PciiFromHandle((HANDLE)hConv);
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
fRet = NtUserImpersonateDdeClientWindow(pcoi->hwndPartner, pcoi->hwndConv);
Exit:
LeaveDDECrit;
return (fRet);
}
/***************************************************************************\
* DdeDisconnect (DDEML API)
*
* Description:
* Terminates a conversation.
*
* History:
* 11-12-91 sanfords Created.
\***************************************************************************/
BOOL DdeDisconnect(
HCONV hConv)
{
BOOL fRet = FALSE;
PCONV_INFO pcoi;
PCL_INSTANCE_INFO pcii;
CheckDDECritOut;
EnterDDECrit;
pcoi = (PCONV_INFO)ValidateCHandle((HANDLE)hConv,
HTYPE_CLIENT_CONVERSATION, HINST_ANY);
if (pcoi == NULL) {
pcoi = (PCONV_INFO)ValidateCHandle((HANDLE)hConv,
HTYPE_SERVER_CONVERSATION, HINST_ANY);
}
if (pcoi == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
pcii = PciiFromHandle((HANDLE)hConv);
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (pcoi->state & ST_CONNECTED) {
ShutdownConversation(pcoi, FALSE);
}
fRet = TRUE;
Exit:
LeaveDDECrit;
return (fRet);
}
/***************************************************************************\
* DdeDisconnectList (DDEML API)
*
* Description:
* Terminates all conversations in a conversation list and frees the list.
*
* History:
* 11-12-91 sanfords Created.
\***************************************************************************/
BOOL DdeDisconnectList(
HCONVLIST hConvList)
{
BOOL fRet = FALSE;
PCL_INSTANCE_INFO pcii;
PCONVLIST pcl;
PCONV_INFO pcoi, pcoiNext;
int i;
CheckDDECritOut;
EnterDDECrit;
pcl = (PCONVLIST)ValidateCHandle((HANDLE)hConvList,
HTYPE_CONVERSATION_LIST, HINST_ANY);
if (pcl == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
ValidateConvList(hConvList);
pcii = PciiFromHandle((HANDLE)hConvList);
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
for(i = pcl->chwnd - 1; i >= 0; i--) {
pcoi = (PCONV_INFO)GetWindowLong(pcl->ahwnd[i], GWL_PCI);
while (pcoi != NULL && pcoi->state & ST_CONNECTED) {
pcoiNext = pcoi->next;
ShutdownConversation(pcoi, FALSE); // may unlink pcoi!
pcoi = pcoiNext;
}
}
DestroyHandle((HANDLE)hConvList);
DDEMLFree(pcl);
fRet = TRUE;
Exit:
LeaveDDECrit;
return (fRet);
}
/***************************************************************************\
* DdeQueryNextServer (DDEML API)
*
* Description:
* Enumerates conversations within a list.
*
* History:
* 11-12-91 sanfords Created.
\***************************************************************************/
HCONV DdeQueryNextServer(
HCONVLIST hConvList,
HCONV hConvPrev)
{
HCONV hConvRet = 0;
PCONVLIST pcl;
HWND *phwnd;
int i;
PCL_CONV_INFO pci;
PCL_INSTANCE_INFO pcii;
EnterDDECrit;
pcl = (PCONVLIST)ValidateCHandle((HANDLE)hConvList,
HTYPE_CONVERSATION_LIST, HINST_ANY);
if (pcl == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (!pcl->chwnd) { // empty list
goto Exit;
}
pcii = PciiFromHandle((HANDLE)hConvList);
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
pcii->LastError = DMLERR_NO_ERROR;
do {
hConvRet = 0;
if (hConvPrev == 0) {
pci = (PCL_CONV_INFO)GetWindowLong(pcl->ahwnd[0], GWL_PCI);
if (pci == NULL) {
goto Exit; // Must have all conversations zombied.
}
hConvPrev = hConvRet = pci->ci.hConv;
continue;
}
pci = (PCL_CONV_INFO)ValidateCHandle((HANDLE)hConvPrev,
HTYPE_CLIENT_CONVERSATION, InstFromHandle(hConvList));
if (pci == NULL) {
pci = (PCL_CONV_INFO)ValidateCHandle((HANDLE)hConvPrev,
HTYPE_ZOMBIE_CONVERSATION, InstFromHandle(hConvList));
if (pci == NULL) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
break;
} else {
goto ZombieSkip;
}
}
if (pci->hConvList != hConvList) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
break;
}
ZombieSkip:
if (pci->ci.next == NULL) {
/*
* end of list for this window, go to next window
*/
for (phwnd = pcl->ahwnd, i = 0; (i + 1) < pcl->chwnd; i++) {
if (phwnd[i] == pci->ci.hwndConv) {
pci = (PCL_CONV_INFO)GetWindowLong(phwnd[i + 1], GWL_PCI);
if (pci == NULL) {
break;
}
hConvPrev = hConvRet = pci->ci.hConv;
break;
}
}
} else {
hConvPrev = hConvRet = pci->ci.next->hConv; // next conv for this window.
}
} while (hConvRet && TypeFromHandle(hConvRet) == HTYPE_ZOMBIE_CONVERSATION);
Exit:
LeaveDDECrit;
return (hConvRet);
}
/***************************************************************************\
* DdeReconnect (DDEML API)
*
* Description:
* Attempts to reconnect an externally (from the server) terminated
* client side conversation.
*
* History:
* 11-12-91 sanfords Created.
\***************************************************************************/
HCONV DdeReconnect(
HCONV hConv)
{
PCL_INSTANCE_INFO pcii;
PCL_CONV_INFO pci, pciNew;
HCONV hConvRet = 0;
CONVCONTEXT cc;
EnterDDECrit;
pcii = PciiFromHandle((HANDLE)hConv);
if (pcii == NULL) {
BestSetLastDDEMLError(DMLERR_INVALIDPARAMETER);
goto Exit;
}
pci = (PCL_CONV_INFO)ValidateCHandle((HANDLE)hConv,
HTYPE_CLIENT_CONVERSATION, HINST_ANY);
if (pci == NULL) {
SetLastDDEMLError(pcii, DMLERR_INVALIDPARAMETER);
goto Exit;
}
if (pci->ci.state & ST_CONNECTED) {
goto Exit;
}
GetConvContext(pci->ci.hwndConv, (LONG *)&cc);
pciNew = ConnectConv(pcii, pci->ci.laService, pci->ci.laTopic,
pci->hwndReconnect, 0, &cc, 0, CLST_SINGLE_INITIALIZING);
if (pciNew == NULL) {
SetLastDDEMLError(pcii, DMLERR_NO_CONV_ESTABLISHED);
goto Exit;
} else {
hConvRet = pciNew->ci.hConv;
if (pci->ci.cLinks) {
PXACT_INFO pxi;
int iLink;
PADVISE_LINK paLink;
/*
* reestablish advise links
*/
for (paLink = pci->ci.aLinks, iLink = pci->ci.cLinks;
iLink; paLink++, iLink--) {
pxi = (PXACT_INFO)DDEMLAlloc(sizeof(XACT_INFO));
if (pxi == NULL) {
break; // abort relinking
}
pxi->pcoi = (PCONV_INFO)pciNew;
pxi->gaItem = LocalToGlobalAtom(paLink->laItem); // pxi copy
pxi->wFmt = paLink->wFmt;
pxi->wType = (WORD)((paLink->wType >> 12) | XTYP_ADVSTART);
if (ClStartAdvise(pxi)) {
pxi->flags |= XIF_ABANDONED;
} else {
GlobalDeleteAtom(pxi->gaItem);
DDEMLFree(pxi);
}
}
}
}