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wine/dlls/user32/dde_client.c
Thomas Faller 4e7a7d01ff dde: Fix use-after-free. 
Signed-off-by: Thomas Faller <tfaller1@gmx.de>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2016-01-13 16:06:44 +09:00

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/*
* DDEML library
*
* Copyright 1997 Alexandre Julliard
* Copyright 1997 Len White
* Copyright 1999 Keith Matthews
* Copyright 2000 Corel
* Copyright 2001 Eric Pouech
* Copyright 2004, 2005 Dmitry Timoshkov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
#include "dde.h"
#include "ddeml.h"
#include "win.h"
#include "wine/debug.h"
#include "dde_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(ddeml);
static LRESULT CALLBACK WDML_ClientProc(HWND, UINT, WPARAM, LPARAM); /* only for one client, not conv list */
const char WDML_szClientConvClassA[] = "WineDdeClientA";
const WCHAR WDML_szClientConvClassW[] = {'W','i','n','e','D','d','e','C','l','i','e','n','t','W',0};
/******************************************************************************
* DdeConnectList [USER32.@] Establishes conversation with DDE servers
*
* PARAMS
* idInst [I] Instance identifier
* hszService [I] Handle to service name string
* hszTopic [I] Handle to topic name string
* hConvList [I] Handle to conversation list
* pCC [I] Pointer to structure with context data
*
* RETURNS
* Success: Handle to new conversation list
* Failure: 0
*/
HCONVLIST WINAPI DdeConnectList(DWORD idInst, HSZ hszService, HSZ hszTopic,
HCONVLIST hConvList, PCONVCONTEXT pCC)
{
FIXME("(%d,%p,%p,%p,%p): stub\n", idInst, hszService, hszTopic, hConvList, pCC);
return (HCONVLIST)1;
}
/*****************************************************************
* DdeQueryNextServer [USER32.@]
*/
HCONV WINAPI DdeQueryNextServer(HCONVLIST hConvList, HCONV hConvPrev)
{
FIXME("(%p,%p): stub\n", hConvList, hConvPrev);
return 0;
}
/******************************************************************************
* DdeDisconnectList [USER32.@] Destroys list and terminates conversations
*
*
* PARAMS
* hConvList [I] Handle to conversation list
*
* RETURNS
* Success: TRUE
* Failure: FALSE
*/
BOOL WINAPI DdeDisconnectList(HCONVLIST hConvList)
{
FIXME("(%p): stub\n", hConvList);
return TRUE;
}
/*****************************************************************
* DdeConnect (USER32.@)
*/
HCONV WINAPI DdeConnect(DWORD idInst, HSZ hszService, HSZ hszTopic,
PCONVCONTEXT pCC)
{
HWND hwndClient;
WDML_INSTANCE* pInstance;
WDML_CONV* pConv;
ATOM aSrv = 0, aTpc = 0;
TRACE("(0x%x,%p,%p,%p)\n", idInst, hszService, hszTopic, pCC);
pInstance = WDML_GetInstance(idInst);
if (!pInstance)
return NULL;
/* make sure this conv is never created */
pConv = WDML_FindConv(pInstance, WDML_CLIENT_SIDE, hszService, hszTopic);
if (pConv != NULL)
{
ERR("This Conv already exists: (%p)\n", pConv);
return NULL;
}
/* we need to establish a conversation with
server, so create a window for it */
if (pInstance->unicode)
{
WNDCLASSEXW wndclass;
wndclass.cbSize = sizeof(wndclass);
wndclass.style = 0;
wndclass.lpfnWndProc = WDML_ClientProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 2 * sizeof(ULONG_PTR);
wndclass.hInstance = 0;
wndclass.hIcon = 0;
wndclass.hCursor = 0;
wndclass.hbrBackground = 0;
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = WDML_szClientConvClassW;
wndclass.hIconSm = 0;
RegisterClassExW(&wndclass);
hwndClient = CreateWindowW(WDML_szClientConvClassW, NULL, WS_POPUP, 0, 0, 0, 0, 0, 0, 0, 0);
}
else
{
WNDCLASSEXA wndclass;
wndclass.cbSize = sizeof(wndclass);
wndclass.style = 0;
wndclass.lpfnWndProc = WDML_ClientProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 2 * sizeof(ULONG_PTR);
wndclass.hInstance = 0;
wndclass.hIcon = 0;
wndclass.hCursor = 0;
wndclass.hbrBackground = 0;
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = WDML_szClientConvClassA;
wndclass.hIconSm = 0;
RegisterClassExA(&wndclass);
hwndClient = CreateWindowA(WDML_szClientConvClassA, NULL, WS_POPUP, 0, 0, 0, 0, 0, 0, 0, 0);
}
SetWindowLongPtrW(hwndClient, GWL_WDML_INSTANCE, (ULONG_PTR)pInstance);
if (hszService)
{
aSrv = WDML_MakeAtomFromHsz(hszService);
if (!aSrv) goto theEnd;
}
if (hszTopic)
{
aTpc = WDML_MakeAtomFromHsz(hszTopic);
if (!aTpc) goto theEnd;
}
/* note: sent messages shall not use packing */
SendMessageTimeoutW( HWND_BROADCAST, WM_DDE_INITIATE, (WPARAM)hwndClient, MAKELPARAM(aSrv, aTpc),
SMTO_ABORTIFHUNG, 0, NULL );
pInstance = WDML_GetInstance(idInst);
if (!pInstance)
{
goto theEnd;
}
/* At this point, Client WM_DDE_ACK should have saved hwndServer
for this instance id and hwndClient if server responds.
So get HCONV and return it. And add it to conv list */
pConv = WDML_GetConvFromWnd(hwndClient);
if (pConv == NULL || pConv->hwndServer == 0)
{
WARN("Done with INITIATE, but no Server window available\n");
pConv = NULL;
pInstance->lastError = DMLERR_NO_CONV_ESTABLISHED;
goto theEnd;
}
TRACE("Connected to Server window (%p)\n", pConv->hwndServer);
pConv->wConvst = XST_CONNECTED;
/* finish init of pConv */
if (pCC != NULL)
{
pConv->convContext = *pCC;
}
else
{
memset(&pConv->convContext, 0, sizeof(pConv->convContext));
pConv->convContext.cb = sizeof(pConv->convContext);
pConv->convContext.iCodePage = (pInstance->unicode) ? CP_WINUNICODE : CP_WINANSI;
}
theEnd:
if (aSrv) GlobalDeleteAtom(aSrv);
if (aTpc) GlobalDeleteAtom(aTpc);
return (HCONV)pConv;
}
/*****************************************************************
* DdeReconnect (DDEML.37)
* DdeReconnect (USER32.@)
*/
HCONV WINAPI DdeReconnect(HCONV hConv)
{
WDML_CONV* pConv;
WDML_CONV* pNewConv = NULL;
ATOM aSrv = 0, aTpc = 0;
TRACE("(%p)\n", hConv);
pConv = WDML_GetConv(hConv, FALSE);
if (pConv != NULL && (pConv->wStatus & ST_CLIENT))
{
BOOL ret;
/* to reestablish a connection, we have to make sure that:
* 1/ pConv is the conversation attached to the client window (it wouldn't be
* if a call to DdeReconnect would have already been done...)
* FIXME: is this really an error ???
* 2/ the pConv conversation had really been deconnected
*/
if (pConv == WDML_GetConvFromWnd(pConv->hwndClient) &&
(pConv->wStatus & ST_TERMINATED) && !(pConv->wStatus & ST_CONNECTED))
{
HWND hwndClient = pConv->hwndClient;
HWND hwndServer = pConv->hwndServer;
SetWindowLongPtrW(pConv->hwndClient, GWL_WDML_CONVERSATION, 0);
aSrv = WDML_MakeAtomFromHsz(pConv->hszService);
aTpc = WDML_MakeAtomFromHsz(pConv->hszTopic);
if (!aSrv || !aTpc) goto theEnd;
/* note: sent messages shall not use packing */
ret = SendMessageW(hwndServer, WM_DDE_INITIATE, (WPARAM)hwndClient,
MAKELPARAM(aSrv, aTpc));
pConv = WDML_GetConv(hConv, FALSE);
if (pConv == NULL)
{
FIXME("Should fail reconnection\n");
goto theEnd;
}
if (ret && (pNewConv = WDML_GetConvFromWnd(pConv->hwndClient)) != NULL)
{
/* re-establish all links... */
WDML_LINK* pLink;
for (pLink = pConv->instance->links[WDML_CLIENT_SIDE]; pLink; pLink = pLink->next)
{
if (pLink->hConv == hConv)
{
/* try to reestablish the links... */
DdeClientTransaction(NULL, 0, (HCONV)pNewConv, pLink->hszItem, pLink->uFmt,
pLink->transactionType, 1000, NULL);
}
}
}
else
{
/* reset the conversation as it was */
SetWindowLongPtrW(pConv->hwndClient, GWL_WDML_CONVERSATION, (ULONG_PTR)pConv);
}
}
}
theEnd:
if (aSrv) GlobalDeleteAtom(aSrv);
if (aTpc) GlobalDeleteAtom(aTpc);
return (HCONV)pNewConv;
}
/******************************************************************
* WDML_ClientQueueAdvise
*
* Creates and queue an WM_DDE_ADVISE transaction
*/
static WDML_XACT* WDML_ClientQueueAdvise(WDML_CONV* pConv, UINT wType, UINT wFmt, HSZ hszItem)
{
DDEADVISE* pDdeAdvise;
WDML_XACT* pXAct;
ATOM atom;
TRACE("XTYP_ADVSTART (with%s data) transaction\n", (wType & XTYPF_NODATA) ? "out" : "");
atom = WDML_MakeAtomFromHsz(hszItem);
if (!atom) return NULL;
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_ADVISE, wFmt, hszItem);
if (!pXAct)
{
GlobalDeleteAtom(atom);
return NULL;
}
pXAct->wType = wType & ~0x0F;
pXAct->hMem = GlobalAlloc(GHND | GMEM_DDESHARE, sizeof(DDEADVISE));
/* FIXME: hMem is unfreed for now... should be deleted in server */
/* pack DdeAdvise */
pDdeAdvise = GlobalLock(pXAct->hMem);
pDdeAdvise->fAckReq = (wType & XTYPF_ACKREQ) != 0;
pDdeAdvise->fDeferUpd = (wType & XTYPF_NODATA) != 0;
pDdeAdvise->cfFormat = wFmt;
GlobalUnlock(pXAct->hMem);
pXAct->lParam = PackDDElParam(WM_DDE_ADVISE, (UINT_PTR)pXAct->hMem, atom);
return pXAct;
}
/******************************************************************
* WDML_HandleAdviseReply
*
* handles the reply to an advise request
*/
static WDML_QUEUE_STATE WDML_HandleAdviseReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct, DWORD *ack)
{
DDEACK ddeAck;
UINT_PTR uiLo, uiHi;
HSZ hsz;
if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
{
return WDML_QS_PASS;
}
UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
return WDML_QS_PASS;
GlobalDeleteAtom(uiHi);
FreeDDElParam(WM_DDE_ACK, msg->lParam);
if (ack) *ack = uiLo;
WDML_ExtractAck(uiLo, &ddeAck);
if (ddeAck.fAck)
{
WDML_LINK* pLink;
/* billx: first to see if the link is already created. */
pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
pXAct->hszItem, TRUE, pXAct->wFmt);
if (pLink != NULL)
{
/* we found a link, and only need to modify it in case it changes */
pLink->transactionType = pXAct->wType;
}
else
{
WDML_AddLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
pXAct->wType, pXAct->hszItem, pXAct->wFmt);
}
pXAct->hDdeData = (HDDEDATA)1;
}
else
{
TRACE("Returning FALSE on XTYP_ADVSTART - fAck was FALSE\n");
GlobalFree(pXAct->hMem);
pXAct->hDdeData = NULL;
}
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_ClientQueueUnadvise
*
* queues an unadvise transaction
*/
static WDML_XACT* WDML_ClientQueueUnadvise(WDML_CONV* pConv, UINT wFmt, HSZ hszItem)
{
WDML_XACT* pXAct;
ATOM atom;
TRACE("XTYP_ADVSTOP transaction\n");
atom = WDML_MakeAtomFromHsz(hszItem);
if (!atom) return NULL;
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_UNADVISE, wFmt, hszItem);
if (!pXAct)
{
GlobalDeleteAtom(atom);
return NULL;
}
/* end advise loop: post WM_DDE_UNADVISE to server to terminate link
* on the specified item.
*/
pXAct->lParam = PackDDElParam(WM_DDE_UNADVISE, wFmt, atom);
return pXAct;
}
/******************************************************************
* WDML_HandleUnadviseReply
*
*
*/
static WDML_QUEUE_STATE WDML_HandleUnadviseReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct, DWORD *ack)
{
DDEACK ddeAck;
UINT_PTR uiLo, uiHi;
HSZ hsz;
if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
{
return WDML_QS_PASS;
}
UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
return WDML_QS_PASS;
FreeDDElParam(WM_DDE_ACK, msg->lParam);
GlobalDeleteAtom(uiHi);
if (ack) *ack = uiLo;
WDML_ExtractAck(uiLo, &ddeAck);
TRACE("WM_DDE_ACK received while waiting for a timeout\n");
if (!ddeAck.fAck)
{
TRACE("Returning FALSE on XTYP_ADVSTOP - fAck was FALSE\n");
pXAct->hDdeData = NULL;
}
else
{
/* billx: remove the link */
WDML_RemoveLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE,
pXAct->hszItem, pXAct->wFmt);
pXAct->hDdeData = (HDDEDATA)1;
}
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_ClientQueueRequest
*
*
*/
static WDML_XACT* WDML_ClientQueueRequest(WDML_CONV* pConv, UINT wFmt, HSZ hszItem)
{
WDML_XACT* pXAct;
ATOM atom;
TRACE("XTYP_REQUEST transaction\n");
atom = WDML_MakeAtomFromHsz(hszItem);
if (!atom) return NULL;
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_REQUEST, wFmt, hszItem);
if (!pXAct)
{
GlobalDeleteAtom(atom);
return NULL;
}
pXAct->lParam = PackDDElParam(WM_DDE_REQUEST, wFmt, atom);
return pXAct;
}
/******************************************************************
* WDML_HandleRequestReply
*
*
*/
static WDML_QUEUE_STATE WDML_HandleRequestReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct, DWORD *ack)
{
DDEACK ddeAck;
WINE_DDEHEAD wdh;
UINT_PTR uiLo, uiHi;
HSZ hsz;
if (WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
return WDML_QS_PASS;
switch (msg->message)
{
case WM_DDE_ACK:
UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
FreeDDElParam(WM_DDE_ACK, msg->lParam);
GlobalDeleteAtom(uiHi);
if (ack) *ack = uiLo;
WDML_ExtractAck(uiLo, &ddeAck);
pXAct->hDdeData = 0;
if (ddeAck.fAck)
ERR("Positive answer should appear in NACK for a request, assuming negative\n");
TRACE("Negative answer...\n");
break;
case WM_DDE_DATA:
UnpackDDElParam(WM_DDE_DATA, msg->lParam, &uiLo, &uiHi);
TRACE("Got the result (%08lx)\n", uiLo);
hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
return WDML_QS_PASS;
pXAct->hDdeData = WDML_Global2DataHandle(pConv, (HGLOBAL)uiLo, &wdh);
if (wdh.fRelease)
{
GlobalFree((HGLOBAL)uiLo);
}
if (wdh.fAckReq)
{
pConv->instance->lastError = DMLERR_MEMORY_ERROR;
}
else
{
GlobalDeleteAtom(uiHi);
FreeDDElParam(WM_DDE_ACK, msg->lParam);
}
break;
default:
FreeDDElParam(msg->message, msg->lParam);
return WDML_QS_PASS;
}
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_BuildExecuteCommand
*
* Creates a DDE block suitable for sending in WM_DDE_COMMAND
* It also takes care of string conversion between the two window procedures
*/
static HGLOBAL WDML_BuildExecuteCommand(WDML_CONV* pConv, LPCVOID pData, DWORD cbData)
{
HGLOBAL hMem;
BOOL clientUnicode, serverUnicode;
DWORD memSize;
clientUnicode = pConv->instance->unicode;
TRACE("client %p uses unicode = %d\n", pConv->hwndClient, clientUnicode);
/* FIXME: how exactly Windows determines what to use for the server side? */
serverUnicode = IsWindowUnicode(pConv->hwndServer) && IsWindowUnicode(pConv->hwndClient);
TRACE("server %p uses unicode = %d\n", pConv->hwndServer, serverUnicode);
if (clientUnicode == serverUnicode)
{
memSize = cbData;
}
else
{
if (clientUnicode)
{
memSize = WideCharToMultiByte( CP_ACP, 0, pData, cbData / sizeof(WCHAR), NULL, 0, NULL, NULL);
}
else
{
memSize = MultiByteToWideChar( CP_ACP, 0, pData, cbData, NULL, 0) * sizeof(WCHAR);
}
}
hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, memSize);
if (hMem)
{
LPSTR pDst;
pDst = GlobalLock(hMem);
if (pDst)
{
if (clientUnicode == serverUnicode)
{
memcpy(pDst, pData, cbData);
}
else
{
if (clientUnicode)
{
WideCharToMultiByte( CP_ACP, 0, pData, cbData / sizeof(WCHAR), pDst, memSize, NULL, NULL);
}
else
{
MultiByteToWideChar( CP_ACP, 0, pData, cbData, (LPWSTR)pDst, memSize/sizeof(WCHAR));
}
}
GlobalUnlock(hMem);
}
else
{
GlobalFree(hMem);
hMem = 0;
}
}
return hMem;
}
/******************************************************************
* WDML_ClientQueueExecute
*
*
*/
static WDML_XACT* WDML_ClientQueueExecute(WDML_CONV* pConv, LPVOID pData, DWORD cbData)
{
WDML_XACT* pXAct;
TRACE("XTYP_EXECUTE transaction\n");
if (pData == NULL)
{
if (cbData == (DWORD)-1)
pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
else
pConv->instance->lastError = DMLERR_MEMORY_ERROR;
return NULL;
}
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_EXECUTE, 0, 0);
if (!pXAct)
return NULL;
if (cbData == (DWORD)-1)
{
HDDEDATA hDdeData = pData;
pData = DdeAccessData(hDdeData, &cbData);
if (pData)
{
pXAct->hMem = WDML_BuildExecuteCommand(pConv, pData, cbData);
DdeUnaccessData(hDdeData);
}
}
else
{
pXAct->hMem = WDML_BuildExecuteCommand(pConv, pData, cbData);
}
pXAct->lParam = (LPARAM)pXAct->hMem;
return pXAct;
}
/******************************************************************
* WDML_HandleExecuteReply
*
*
*/
static WDML_QUEUE_STATE WDML_HandleExecuteReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct, DWORD *ack)
{
DDEACK ddeAck;
UINT_PTR uiLo, uiHi;
if (msg->message != WM_DDE_ACK || WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
{
return WDML_QS_PASS;
}
UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
FreeDDElParam(WM_DDE_ACK, msg->lParam);
if ((HANDLE)uiHi != pXAct->hMem)
{
return WDML_QS_PASS;
}
if (ack) *ack = uiLo;
WDML_ExtractAck(uiLo, &ddeAck);
pXAct->hDdeData = (HDDEDATA)(UINT_PTR)ddeAck.fAck;
TRACE("hDdeData = %p\n", pXAct->hDdeData);
pConv->instance->lastError = (pXAct->hDdeData != 0) ? DMLERR_NO_ERROR : DMLERR_NOTPROCESSED;
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_ClientQueuePoke
*
*
*/
static WDML_XACT* WDML_ClientQueuePoke(WDML_CONV* pConv, LPVOID pData, DWORD cbData,
UINT wFmt, HSZ hszItem)
{
DDE_DATAHANDLE_HEAD *dh;
WDML_XACT *pXAct;
DDEPOKE *ddePoke;
HGLOBAL hglobal;
ATOM atom;
TRACE("XTYP_POKE transaction\n");
atom = WDML_MakeAtomFromHsz(hszItem);
if (!atom) return NULL;
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_POKE, wFmt, hszItem);
if (!pXAct)
{
GlobalDeleteAtom(atom);
return NULL;
}
if (cbData == (DWORD)-1)
{
hglobal = pData;
dh = GlobalLock(hglobal);
cbData = GlobalSize(hglobal) - sizeof(DDE_DATAHANDLE_HEAD);
pData = dh + 1;
GlobalUnlock(hglobal);
}
pXAct->hMem = GlobalAlloc(GHND | GMEM_DDESHARE, FIELD_OFFSET(DDEPOKE, Value[cbData]));
ddePoke = GlobalLock(pXAct->hMem);
if (!ddePoke)
{
pConv->instance->lastError = DMLERR_MEMORY_ERROR;
return NULL;
}
ddePoke->unused = 0;
ddePoke->fRelease = TRUE;
ddePoke->cfFormat = wFmt;
memcpy(ddePoke->Value, pData, cbData);
GlobalUnlock(pXAct->hMem);
pXAct->lParam = PackDDElParam(WM_DDE_POKE, (UINT_PTR)pXAct->hMem, atom);
return pXAct;
}
/******************************************************************
* WDML_HandlePokeReply
*
*
*/
static WDML_QUEUE_STATE WDML_HandlePokeReply(WDML_CONV* pConv, MSG* msg, WDML_XACT* pXAct, DWORD *ack)
{
UINT_PTR uiLo, uiHi;
HSZ hsz;
if (msg->message != WM_DDE_ACK && WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
{
return WDML_QS_PASS;
}
UnpackDDElParam(WM_DDE_ACK, msg->lParam, &uiLo, &uiHi);
hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
if (DdeCmpStringHandles(hsz, pXAct->hszItem) != 0)
{
return WDML_QS_PASS;
}
FreeDDElParam(WM_DDE_ACK, msg->lParam);
GlobalDeleteAtom(uiHi);
if (ack) *ack = uiLo;
pXAct->hMem = GlobalFree(pXAct->hMem);
pXAct->hDdeData = (HDDEDATA)TRUE;
return TRUE;
}
/******************************************************************
* WDML_ClientQueueTerminate
*
* Creates and queue an WM_DDE_TERMINATE transaction
*/
static WDML_XACT* WDML_ClientQueueTerminate(WDML_CONV* pConv)
{
WDML_XACT* pXAct;
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_TERMINATE, 0, 0);
if (!pXAct)
return NULL;
pXAct->lParam = 0;
pConv->wStatus &= ~ST_CONNECTED;
return pXAct;
}
/******************************************************************
* WDML_HandleTerminateReply
*
* handles the reply to a terminate request
*/
static WDML_QUEUE_STATE WDML_HandleTerminateReply(WDML_CONV* pConv, MSG* msg)
{
if (msg->message != WM_DDE_TERMINATE)
{
/* FIXME: should delete data passed here */
return WDML_QS_SWALLOWED;
}
if (WIN_GetFullHandle((HWND)msg->wParam) != pConv->hwndServer)
{
FIXME("hmmm shouldn't happen\n");
return WDML_QS_PASS;
}
if (!(pConv->instance->CBFflags & CBF_SKIP_DISCONNECTS))
{
WDML_InvokeCallback(pConv->instance, XTYP_DISCONNECT, 0, (HCONV)pConv,
0, 0, 0, 0, (pConv->wStatus & ST_ISSELF) ? 1 : 0);
}
WDML_RemoveConv(pConv, WDML_CLIENT_SIDE);
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_HandleIncomingData
*
*
*/
static WDML_QUEUE_STATE WDML_HandleIncomingData(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd)
{
UINT_PTR uiLo, uiHi;
HDDEDATA hDdeDataIn, hDdeDataOut;
WDML_LINK* pLink;
WINE_DDEHEAD wdh;
HSZ hsz;
TRACE("WM_DDE_DATA message received in the Client Proc!\n");
/* wParam -- sending window handle */
/* lParam -- hDdeData & item HSZ */
UnpackDDElParam(WM_DDE_DATA, msg->lParam, &uiLo, &uiHi);
hsz = WDML_MakeHszFromAtom(pConv->instance, uiHi);
hDdeDataIn = WDML_Global2DataHandle(pConv, (HGLOBAL)uiLo, &wdh);
/* billx:
* For hot link, data should be passed to its callback with
* XTYP_ADVDATA and callback should return the proper status.
*/
pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_CLIENT_SIDE, hsz,
uiLo != 0, wdh.cfFormat);
if (!pLink)
{
WDML_DecHSZ(pConv->instance, hsz);
DdeFreeDataHandle(hDdeDataIn);
return WDML_QS_PASS;
}
if (hDdeDataIn != 0 && wdh.fAckReq)
{
WDML_PostAck(pConv, WDML_CLIENT_SIDE, 0, FALSE, TRUE, uiHi, msg->lParam, WM_DDE_DATA);
if (msg->lParam)
msg->lParam = 0;
}
else
{
GlobalDeleteAtom(uiHi);
}
hDdeDataOut = WDML_InvokeCallback(pConv->instance, XTYP_ADVDATA, pLink->uFmt, pLink->hConv,
pConv->hszTopic, pLink->hszItem, hDdeDataIn, 0, 0);
if (hDdeDataOut != (HDDEDATA)DDE_FACK || wdh.fRelease)
{
if (uiLo) GlobalFree((HANDLE)uiLo);
}
DdeFreeDataHandle(hDdeDataIn);
WDML_DecHSZ(pConv->instance, hsz);
if (msg->lParam)
FreeDDElParam(WM_DDE_DATA, msg->lParam);
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_HandleIncomingTerminate
*
*
*/
static WDML_QUEUE_STATE WDML_HandleIncomingTerminate(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd)
{
if (pConv->hwndServer != WIN_GetFullHandle((HWND)msg->wParam))
return WDML_QS_PASS;
pConv->wStatus |= ST_TERMINATED;
if (pConv->wStatus & ST_CONNECTED)
{
/* don't care about result code (if server exists or not) */
PostMessageW(pConv->hwndServer, WM_DDE_TERMINATE, (WPARAM)pConv->hwndClient, 0L);
pConv->wStatus &= ~ST_CONNECTED;
}
/* have to keep connection around to allow reconnection */
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_HandleReply
*
* handles any incoming reply, and try to match to an already sent request
*/
static WDML_QUEUE_STATE WDML_HandleReply(WDML_CONV* pConv, MSG* msg, HDDEDATA* hdd, DWORD *ack)
{
WDML_XACT* pXAct = pConv->transactions;
WDML_QUEUE_STATE qs;
if (pConv->transactions)
{
if (ack) *ack = DDE_FNOTPROCESSED;
/* first check message against a pending transaction, if any */
switch (pXAct->ddeMsg)
{
case WM_DDE_ADVISE:
qs = WDML_HandleAdviseReply(pConv, msg, pXAct, ack);
break;
case WM_DDE_UNADVISE:
qs = WDML_HandleUnadviseReply(pConv, msg, pXAct, ack);
break;
case WM_DDE_EXECUTE:
qs = WDML_HandleExecuteReply(pConv, msg, pXAct, ack);
break;
case WM_DDE_REQUEST:
qs = WDML_HandleRequestReply(pConv, msg, pXAct, ack);
break;
case WM_DDE_POKE:
qs = WDML_HandlePokeReply(pConv, msg, pXAct, ack);
break;
case WM_DDE_TERMINATE:
qs = WDML_HandleTerminateReply(pConv, msg);
break;
default:
qs = WDML_QS_ERROR;
FIXME("oooch\n");
}
}
else
{
qs = WDML_QS_PASS;
}
/* now check the results */
switch (qs)
{
case WDML_QS_ERROR:
case WDML_QS_SWALLOWED:
*hdd = 0;
break;
case WDML_QS_HANDLED:
/* ok, we have resolved a pending transaction
* notify callback if asynchronous.
*/
if (pXAct->dwTimeout == TIMEOUT_ASYNC && pXAct->ddeMsg != WM_DDE_TERMINATE)
{
WDML_InvokeCallback(pConv->instance, XTYP_XACT_COMPLETE, pXAct->wFmt,
(HCONV)pConv, pConv->hszTopic, pXAct->hszItem,
pXAct->hDdeData, MAKELONG(0, pXAct->xActID), 0 /* FIXME */);
qs = WDML_QS_PASS;
}
else
{
*hdd = pXAct->hDdeData;
}
break;
case WDML_QS_PASS:
/* no pending transaction found, try a warm/hot link or a termination request */
switch (msg->message)
{
case WM_DDE_DATA:
qs = WDML_HandleIncomingData(pConv, msg, hdd);
break;
case WM_DDE_TERMINATE:
qs = WDML_HandleIncomingTerminate(pConv, msg, hdd);
break;
case WM_DDE_ACK:
/* This happens at end of DdeClientTransaction XTYP_EXECUTE
* Without this assignment, DdeClientTransaction's return value is undefined
*/
*hdd = (HDDEDATA)TRUE;
if (ack)
*ack = DDE_FACK;
break;
}
break;
case WDML_QS_BLOCK:
FIXME("shouldn't be used on client side\n");
break;
}
return qs;
}
/******************************************************************
* WDML_SyncWaitTransactionReply
*
* waits until an answer for a sent request is received
* time out is also handled. only used for synchronous transactions
*/
static HDDEDATA WDML_SyncWaitTransactionReply(HCONV hConv, DWORD dwTimeout, const WDML_XACT* pXAct, DWORD *ack)
{
DWORD start, elapsed;
DWORD err;
WDML_CONV* pConv;
TRACE("Starting wait for a timeout of %d ms\n", dwTimeout);
start = GetTickCount();
while ((elapsed = GetTickCount() - start) < dwTimeout)
{
/* we cannot be in the crit sect all the time because when client and server run in a
* single process they need to share the access to the internal data
*/
if (MsgWaitForMultipleObjects(0, NULL, FALSE,
dwTimeout - elapsed, QS_POSTMESSAGE) == WAIT_OBJECT_0)
{
MSG msg;
while (PeekMessageW(&msg, 0, WM_DDE_FIRST, WM_DDE_LAST, PM_REMOVE))
{
HDDEDATA hdd = NULL;
pConv = WDML_GetConv(hConv, FALSE);
if (pConv == NULL)
{
/* conversation no longer available... return failure */
return 0;
}
if (msg.hwnd == pConv->hwndClient)
{
/* check that either pXAct has been processed or no more xActions are pending */
BOOL ret = (pConv->transactions == pXAct);
if (WDML_HandleReply(pConv, &msg, &hdd, ack) == WDML_QS_HANDLED)
{
TRACE("WDML_HandleReply returned WDML_QS_HANDLED\n");
ret = TRUE;
}
else
ret = (pConv->transactions == NULL || ret);
if (ret)
{
pConv->instance->lastError = hdd ? DMLERR_NO_ERROR : DMLERR_NOTPROCESSED;
return hdd;
}
}
else
{
DispatchMessageW(&msg);
}
}
}
}
TRACE("Timeout !!\n");
pConv = WDML_GetConv(hConv, FALSE);
if (pConv != NULL)
{
if (pConv->transactions)
{
switch (pConv->transactions->ddeMsg)
{
case WM_DDE_ADVISE: err = DMLERR_ADVACKTIMEOUT; break;
case WM_DDE_REQUEST: err = DMLERR_DATAACKTIMEOUT; break;
case WM_DDE_EXECUTE: err = DMLERR_EXECACKTIMEOUT; break;
case WM_DDE_POKE: err = DMLERR_POKEACKTIMEOUT; break;
case WM_DDE_UNADVISE: err = DMLERR_UNADVACKTIMEOUT; break;
default: err = DMLERR_INVALIDPARAMETER; break;
}
pConv->instance->lastError = err;
}
}
return 0;
}
/*****************************************************************
* WDML_ClientHandle
*/
HDDEDATA WDML_ClientHandle(WDML_CONV *pConv, WDML_XACT *pXAct, DWORD dwTimeout, LPDWORD pdwResult)
{
HDDEDATA hDdeData;
if (!PostMessageW(pConv->hwndServer, pXAct->ddeMsg, (WPARAM)pConv->hwndClient, pXAct->lParam))
{
WARN("Failed posting message %x to %p (error=0x%x)\n",
pXAct->ddeMsg, pConv->hwndServer, GetLastError());
pConv->wStatus &= ~ST_CONNECTED;
pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
return 0;
}
pXAct->dwTimeout = dwTimeout;
/* FIXME: should set the app bits on *pdwResult */
if (dwTimeout == TIMEOUT_ASYNC)
{
if (pdwResult)
*pdwResult = MAKELONG(0, pXAct->xActID);
hDdeData = (HDDEDATA)1;
}
else
hDdeData = WDML_SyncWaitTransactionReply((HCONV)pConv, dwTimeout, pXAct, pdwResult);
return hDdeData;
}
/*****************************************************************
* DdeClientTransaction (USER32.@)
*/
HDDEDATA WINAPI DdeClientTransaction(LPBYTE pData, DWORD cbData, HCONV hConv, HSZ hszItem, UINT wFmt,
UINT wType, DWORD dwTimeout, LPDWORD pdwResult)
{
WDML_CONV* pConv;
WDML_XACT* pXAct;
HDDEDATA hDdeData;
TRACE("(%p,%d,%p,%p,%x,%x,%d,%p)\n",
pData, cbData, hConv, hszItem, wFmt, wType, dwTimeout, pdwResult);
if (hConv == 0)
{
WARN("Invalid conversation handle NULL\n");
return 0;
}
pConv = WDML_GetConv(hConv, TRUE);
if (pConv == NULL)
{
/* cannot set error... cannot get back to DDE instance */
return 0;
}
switch (wType)
{
case XTYP_EXECUTE:
/* Windows simply ignores hszItem and wFmt in this case */
pXAct = WDML_ClientQueueExecute(pConv, pData, cbData);
if (pXAct == NULL)
return 0;
break;
case XTYP_POKE:
if (!hszItem)
{
pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
return 0;
}
pXAct = WDML_ClientQueuePoke(pConv, pData, cbData, wFmt, hszItem);
break;
case XTYP_ADVSTART|XTYPF_NODATA:
case XTYP_ADVSTART|XTYPF_NODATA|XTYPF_ACKREQ:
case XTYP_ADVSTART:
case XTYP_ADVSTART|XTYPF_ACKREQ:
if (pData)
{
pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
return 0;
}
pXAct = WDML_ClientQueueAdvise(pConv, wType, wFmt, hszItem);
break;
case XTYP_ADVSTOP:
if (pData)
{
pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
return 0;
}
pXAct = WDML_ClientQueueUnadvise(pConv, wFmt, hszItem);
break;
case XTYP_REQUEST:
if (pData || !hszItem)
{
pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
return 0;
}
pXAct = WDML_ClientQueueRequest(pConv, wFmt, hszItem);
break;
default:
FIXME("Unknown transaction type %04x\n", wType);
/* unknown transaction type */
pConv->instance->lastError = DMLERR_INVALIDPARAMETER;
return 0;
}
if (pXAct == NULL)
{
pConv->instance->lastError = DMLERR_MEMORY_ERROR;
return 0;
}
WDML_QueueTransaction(pConv, pXAct);
TRACE("pConv->wStatus %04x\n", pConv->wStatus);
if (pConv->wStatus & ST_BLOCKED)
{
TRACE("Transactions are blocked, add to the queue and exit\n");
return (HDDEDATA)1;
}
hDdeData = WDML_ClientHandle(pConv, pXAct, dwTimeout, pdwResult);
if (dwTimeout != TIMEOUT_ASYNC)
{
WDML_UnQueueTransaction(pConv, pXAct);
WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
}
return hDdeData;
}
/*****************************************************************
* DdeAbandonTransaction (USER32.@)
*/
BOOL WINAPI DdeAbandonTransaction(DWORD idInst, HCONV hConv, DWORD idTransaction)
{
WDML_INSTANCE* pInstance;
WDML_CONV* pConv;
WDML_XACT* pXAct;
if ((pInstance = WDML_GetInstance(idInst)))
{
if (hConv)
{
if ((pConv = WDML_GetConv(hConv, TRUE)) && pConv->instance == pInstance)
{
pXAct = pConv->transactions;
while (pXAct) {
WDML_XACT *nextXAct = pXAct->next;
if (pXAct->dwTimeout == TIMEOUT_ASYNC &&
(idTransaction == 0 || pXAct->xActID == idTransaction))
{
WDML_UnQueueTransaction(pConv, pXAct);
WDML_FreeTransaction(pInstance, pXAct, TRUE);
}
pXAct = nextXAct;
}
}
}
else
{
for (pConv = pInstance->convs[WDML_CLIENT_SIDE]; pConv; pConv = pConv->next)
{
if (!(pConv->wStatus & ST_CONNECTED)) continue;
pXAct = pConv->transactions;
while (pXAct) {
WDML_XACT *nextXAct = pXAct->next;
if (pXAct->dwTimeout == TIMEOUT_ASYNC)
{
WDML_UnQueueTransaction(pConv, pXAct);
WDML_FreeTransaction(pInstance, pXAct, TRUE);
}
pXAct = nextXAct;
}
}
}
}
return TRUE;
}
/******************************************************************
* WDML_ClientProc
*
* Window Proc created on client side for each conversation
*/
static LRESULT CALLBACK WDML_ClientProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
UINT uiLo, uiHi;
WDML_CONV* pConv = NULL;
HSZ hszSrv, hszTpc;
TRACE("%p %04x %08lx %08lx\n", hwnd, iMsg, wParam , lParam);
if (iMsg == WM_DDE_ACK &&
/* in the initial WM_INITIATE sendmessage */
((pConv = WDML_GetConvFromWnd(hwnd)) == NULL || pConv->wStatus == XST_INIT1))
{
/* In response to WM_DDE_INITIATE, save server window */
char buf[256];
WDML_INSTANCE* pInstance;
/* note: sent messages do not need packing */
uiLo = LOWORD(lParam);
uiHi = HIWORD(lParam);
/* FIXME: convlist should be handled here */
if (pConv)
{
/* we already have started the conv with a server, drop other replies */
GlobalDeleteAtom(uiLo);
GlobalDeleteAtom(uiHi);
PostMessageW((HWND)wParam, WM_DDE_TERMINATE, (WPARAM)hwnd, 0);
return 0;
}
pInstance = WDML_GetInstanceFromWnd(hwnd);
hszSrv = WDML_MakeHszFromAtom(pInstance, uiLo);
hszTpc = WDML_MakeHszFromAtom(pInstance, uiHi);
pConv = WDML_AddConv(pInstance, WDML_CLIENT_SIDE, hszSrv, hszTpc, hwnd, (HWND)wParam);
SetWindowLongPtrW(hwnd, GWL_WDML_CONVERSATION, (ULONG_PTR)pConv);
pConv->wStatus |= ST_CONNECTED;
pConv->wConvst = XST_INIT1;
/* check if server is handled by DDEML */
if ((GetClassNameA((HWND)wParam, buf, sizeof(buf)) &&
lstrcmpiA(buf, WDML_szServerConvClassA) == 0) ||
(GetClassNameW((HWND)wParam, (LPWSTR)buf, sizeof(buf)/sizeof(WCHAR)) &&
lstrcmpiW((LPWSTR)buf, WDML_szServerConvClassW) == 0))
{
pConv->wStatus |= ST_ISLOCAL;
}
GlobalDeleteAtom(uiLo);
GlobalDeleteAtom(uiHi);
/* accept conversation */
return 1;
}
if (iMsg >= WM_DDE_FIRST && iMsg <= WM_DDE_LAST)
{
pConv = WDML_GetConvFromWnd(hwnd);
if (pConv)
{
MSG msg;
HDDEDATA hdd;
msg.hwnd = hwnd;
msg.message = iMsg;
msg.wParam = wParam;
msg.lParam = lParam;
WDML_HandleReply(pConv, &msg, &hdd, NULL);
}
return 0;
}
return IsWindowUnicode(hwnd) ? DefWindowProcW(hwnd, iMsg, wParam, lParam) :
DefWindowProcA(hwnd, iMsg, wParam, lParam);
}
/*****************************************************************
* DdeDisconnect (USER32.@)
*/
BOOL WINAPI DdeDisconnect(HCONV hConv)
{
WDML_CONV* pConv;
WDML_XACT* pXAct;
BOOL ret = FALSE;
TRACE("(%p)\n", hConv);
if (hConv == 0)
{
WARN("DdeDisconnect(): hConv = 0\n");
return FALSE;
}
pConv = WDML_GetConv(hConv, TRUE);
if (pConv != NULL)
{
if (pConv->wStatus & ST_CLIENT)
{
/* FIXME: should abandon all pending transactions */
pXAct = WDML_ClientQueueTerminate(pConv);
if (pXAct != NULL)
{
if (PostMessageW(pConv->hwndServer, pXAct->ddeMsg,
(WPARAM)pConv->hwndClient, pXAct->lParam))
{
WDML_SyncWaitTransactionReply(hConv, 10000, pXAct, NULL);
ret = TRUE;
}
else
pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
WDML_FreeTransaction(pConv->instance, pXAct, TRUE);
/* still have to destroy data associated with conversation */
WDML_RemoveConv(pConv, WDML_CLIENT_SIDE);
}
else
{
FIXME("Not implemented yet for a server side conversation\n");
}
}
}
return ret;
}
/*****************************************************************
* DdeImpersonateClient (USER32.@)
*/
BOOL WINAPI DdeImpersonateClient(HCONV hConv)
{
WDML_CONV* pConv;
BOOL ret = FALSE;
TRACE("(%p)\n", hConv);
pConv = WDML_GetConv(hConv, TRUE);
if (pConv)
{
ret = ImpersonateDdeClientWindow(pConv->hwndClient, pConv->hwndServer);
}
return ret;
}
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