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wine/dlls/user32/dde_server.c
Marcus Meissner f3aab0c0e9 user32: Remove useless NULL checks (Coverity).
2011-03-15 17:14:07 +01:00

1127 lines
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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 2003, 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/unicode.h"
#include "wine/debug.h"
#include "dde_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(ddeml);
static const WCHAR szServerNameClass[] = {'W','i','n','e','D','d','e','S','e','r','v','e','r','N','a','m','e',0};
const char WDML_szServerConvClassA[] = "WineDdeServerConvA";
const WCHAR WDML_szServerConvClassW[] = {'W','i','n','e','D','d','e','S','e','r','v','e','r','C','o','n','v','W',0};
static LRESULT CALLBACK WDML_ServerNameProc(HWND, UINT, WPARAM, LPARAM);
static LRESULT CALLBACK WDML_ServerConvProc(HWND, UINT, WPARAM, LPARAM);
/******************************************************************************
* DdePostAdvise [USER32.@] Send transaction to DDE callback function.
*
* PARAMS
* idInst [I] Instance identifier
* hszTopic [I] Handle to topic name string
* hszItem [I] Handle to item name string
*
* RETURNS
* Success: TRUE
* Failure: FALSE
*/
BOOL WINAPI DdePostAdvise(DWORD idInst, HSZ hszTopic, HSZ hszItem)
{
WDML_INSTANCE* pInstance = NULL;
WDML_LINK* pLink = NULL;
HDDEDATA hDdeData = 0;
HGLOBAL hItemData = 0;
WDML_CONV* pConv = NULL;
ATOM atom = 0;
UINT count;
TRACE("(%d,%p,%p)\n", idInst, hszTopic, hszItem);
pInstance = WDML_GetInstance(idInst);
if (pInstance == NULL)
return FALSE;
atom = WDML_MakeAtomFromHsz(hszItem);
if (!atom) return FALSE;
/* first compute the number of links which will trigger a message */
count = 0;
for (pLink = pInstance->links[WDML_SERVER_SIDE]; pLink != NULL; pLink = pLink->next)
{
if (DdeCmpStringHandles(hszItem, pLink->hszItem) == 0)
{
count++;
}
}
if (count >= CADV_LATEACK)
{
FIXME("too high value for count\n");
count &= 0xFFFF;
}
for (pLink = pInstance->links[WDML_SERVER_SIDE]; pLink != NULL; pLink = pLink->next)
{
if (DdeCmpStringHandles(hszItem, pLink->hszItem) == 0)
{
hDdeData = WDML_InvokeCallback(pInstance, XTYP_ADVREQ, pLink->uFmt, pLink->hConv,
hszTopic, hszItem, 0, --count, 0);
if (hDdeData == CBR_BLOCK)
{
/* MS doc is not consistent here */
FIXME("CBR_BLOCK returned for ADVREQ\n");
continue;
}
if (hDdeData)
{
if (pLink->transactionType & XTYPF_NODATA)
{
TRACE("no data\n");
hItemData = 0;
}
else
{
TRACE("with data\n");
hItemData = WDML_DataHandle2Global(hDdeData, FALSE, FALSE, FALSE, FALSE);
}
pConv = WDML_GetConv(pLink->hConv, TRUE);
if (pConv == NULL)
{
if (!WDML_IsAppOwned(hDdeData)) DdeFreeDataHandle(hDdeData);
goto theError;
}
if (!PostMessageW(pConv->hwndClient, WM_DDE_DATA, (WPARAM)pConv->hwndServer,
PackDDElParam(WM_DDE_DATA, (UINT_PTR)hItemData, atom)))
{
ERR("post message failed\n");
pConv->wStatus &= ~ST_CONNECTED;
pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
if (!WDML_IsAppOwned(hDdeData)) DdeFreeDataHandle(hDdeData);
GlobalFree(hItemData);
goto theError;
}
if (!WDML_IsAppOwned(hDdeData)) DdeFreeDataHandle(hDdeData);
}
}
}
return TRUE;
theError:
GlobalDeleteAtom(atom);
return FALSE;
}
/******************************************************************************
* DdeNameService [USER32.@] {Un}registers service name of DDE server
*
* PARAMS
* idInst [I] Instance identifier
* hsz1 [I] Handle to service name string
* hsz2 [I] Reserved
* afCmd [I] Service name flags
*
* RETURNS
* Success: Non-zero
* Failure: 0
*/
HDDEDATA WINAPI DdeNameService(DWORD idInst, HSZ hsz1, HSZ hsz2, UINT afCmd)
{
WDML_SERVER* pServer;
WDML_INSTANCE* pInstance;
HWND hwndServer;
WNDCLASSEXW wndclass;
TRACE("(%d,%p,%p,%x)\n", idInst, hsz1, hsz2, afCmd);
/* First check instance
*/
pInstance = WDML_GetInstance(idInst);
if (pInstance == NULL)
{
TRACE("Instance not found as initialised\n");
/* Nothing has been initialised - exit now ! can return TRUE since effect is the same */
return NULL;
}
if (hsz2 != 0L)
{
/* Illegal, reserved parameter
*/
pInstance->lastError = DMLERR_INVALIDPARAMETER;
WARN("Reserved parameter no-zero !!\n");
return NULL;
}
if (hsz1 == 0 && !(afCmd & DNS_UNREGISTER))
{
/* don't know if we should check this but it makes sense
* why supply REGISTER or filter flags if de-registering all
*/
TRACE("General unregister unexpected flags\n");
pInstance->lastError = DMLERR_INVALIDPARAMETER;
return NULL;
}
switch (afCmd & (DNS_REGISTER | DNS_UNREGISTER))
{
case DNS_REGISTER:
pServer = WDML_FindServer(pInstance, hsz1, 0);
if (pServer)
{
ERR("Trying to register already registered service!\n");
pInstance->lastError = DMLERR_DLL_USAGE;
return NULL;
}
TRACE("Adding service name\n");
WDML_IncHSZ(pInstance, hsz1);
pServer = WDML_AddServer(pInstance, hsz1, 0);
WDML_BroadcastDDEWindows(WDML_szEventClass, WM_WDML_REGISTER,
pServer->atomService, pServer->atomServiceSpec);
wndclass.cbSize = sizeof(wndclass);
wndclass.style = 0;
wndclass.lpfnWndProc = WDML_ServerNameProc;
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 = szServerNameClass;
wndclass.hIconSm = 0;
RegisterClassExW(&wndclass);
hwndServer = CreateWindowW(szServerNameClass, NULL,
WS_POPUP, 0, 0, 0, 0,
0, 0, 0, 0);
SetWindowLongPtrW(hwndServer, GWL_WDML_INSTANCE, (ULONG_PTR)pInstance);
SetWindowLongPtrW(hwndServer, GWL_WDML_SERVER, (ULONG_PTR)pServer);
TRACE("Created nameServer=%p for instance=%08x\n", hwndServer, idInst);
pServer->hwndServer = hwndServer;
break;
case DNS_UNREGISTER:
if (hsz1 == 0L)
{
/* General unregister situation
* terminate all server side pending conversations
*/
while (pInstance->servers)
WDML_RemoveServer(pInstance, pInstance->servers->hszService, 0);
pInstance->servers = NULL;
TRACE("General de-register - finished\n");
}
else
{
WDML_RemoveServer(pInstance, hsz1, 0L);
}
break;
}
if (afCmd & (DNS_FILTERON | DNS_FILTEROFF))
{
/* Set filter flags on to hold notifications of connection
*/
pServer = WDML_FindServer(pInstance, hsz1, 0);
if (!pServer)
{
/* trying to filter where no service names !!
*/
pInstance->lastError = DMLERR_DLL_USAGE;
return NULL;
}
else
{
pServer->filterOn = (afCmd & DNS_FILTERON) != 0;
}
}
return (HDDEDATA)TRUE;
}
/******************************************************************
* WDML_CreateServerConv
*
*
*/
static WDML_CONV* WDML_CreateServerConv(WDML_INSTANCE* pInstance, HWND hwndClient,
HWND hwndServerName, HSZ hszApp, HSZ hszTopic)
{
HWND hwndServerConv;
WDML_CONV* pConv;
if (pInstance->unicode)
{
WNDCLASSEXW wndclass;
wndclass.cbSize = sizeof(wndclass);
wndclass.style = 0;
wndclass.lpfnWndProc = WDML_ServerConvProc;
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_szServerConvClassW;
wndclass.hIconSm = 0;
RegisterClassExW(&wndclass);
hwndServerConv = CreateWindowW(WDML_szServerConvClassW, 0,
WS_CHILD, 0, 0, 0, 0,
hwndServerName, 0, 0, 0);
}
else
{
WNDCLASSEXA wndclass;
wndclass.cbSize = sizeof(wndclass);
wndclass.style = 0;
wndclass.lpfnWndProc = WDML_ServerConvProc;
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_szServerConvClassA;
wndclass.hIconSm = 0;
RegisterClassExA(&wndclass);
hwndServerConv = CreateWindowA(WDML_szServerConvClassA, 0,
WS_CHILD, 0, 0, 0, 0,
hwndServerName, 0, 0, 0);
}
TRACE("Created convServer=%p (nameServer=%p) for instance=%08x unicode=%d\n",
hwndServerConv, hwndServerName, pInstance->instanceID, pInstance->unicode);
pConv = WDML_AddConv(pInstance, WDML_SERVER_SIDE, hszApp, hszTopic,
hwndClient, hwndServerConv);
if (pConv)
{
SetWindowLongPtrW(hwndServerConv, GWL_WDML_INSTANCE, (ULONG_PTR)pInstance);
SetWindowLongPtrW(hwndServerConv, GWL_WDML_CONVERSATION, (ULONG_PTR)pConv);
/* this should be the only place using SendMessage for WM_DDE_ACK */
/* note: sent messages shall not use packing */
SendMessageW(hwndClient, WM_DDE_ACK, (WPARAM)hwndServerConv,
MAKELPARAM(WDML_MakeAtomFromHsz(hszApp), WDML_MakeAtomFromHsz(hszTopic)));
/* we assume we're connected since we've sent an answer...
* I'm not sure what we can do... it doesn't look like the return value
* of SendMessage is used... sigh...
*/
pConv->wStatus |= ST_CONNECTED;
}
else
{
DestroyWindow(hwndServerConv);
}
return pConv;
}
/******************************************************************
* WDML_ServerNameProc
*
*
*/
static LRESULT CALLBACK WDML_ServerNameProc(HWND hwndServer, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
HWND hwndClient;
HSZ hszApp, hszTop;
HDDEDATA hDdeData = 0;
WDML_INSTANCE* pInstance;
UINT_PTR uiLo, uiHi;
switch (iMsg)
{
case WM_DDE_INITIATE:
/* wParam -- sending window handle
LOWORD(lParam) -- application atom
HIWORD(lParam) -- topic atom */
TRACE("WM_DDE_INITIATE message received!\n");
hwndClient = (HWND)wParam;
pInstance = WDML_GetInstanceFromWnd(hwndServer);
if (!pInstance) return 0;
TRACE("idInst=%d, threadID=0x%x\n", pInstance->instanceID, GetCurrentThreadId());
/* don't free DDEParams, since this is a broadcast */
UnpackDDElParam(WM_DDE_INITIATE, lParam, &uiLo, &uiHi);
hszApp = WDML_MakeHszFromAtom(pInstance, uiLo);
hszTop = WDML_MakeHszFromAtom(pInstance, uiHi);
if (!(pInstance->CBFflags & CBF_FAIL_CONNECTIONS))
{
BOOL self = FALSE;
CONVCONTEXT cc;
CONVCONTEXT* pcc = NULL;
WDML_CONV* pConv;
char buf[256];
if (GetWindowThreadProcessId(hwndClient, NULL) == GetWindowThreadProcessId(hwndServer, NULL) &&
WDML_GetInstanceFromWnd(hwndClient) == WDML_GetInstanceFromWnd(hwndServer))
{
self = TRUE;
}
/* FIXME: so far, we don't grab distant convcontext, so only check if remote is
* handled under DDEML, and if so build a default context
*/
if ((GetClassNameA(hwndClient, buf, sizeof(buf)) &&
lstrcmpiA(buf, WDML_szClientConvClassA) == 0) ||
(GetClassNameW(hwndClient, (LPWSTR)buf, sizeof(buf)/sizeof(WCHAR)) &&
lstrcmpiW((LPWSTR)buf, WDML_szClientConvClassW) == 0))
{
pcc = &cc;
memset(pcc, 0, sizeof(*pcc));
pcc->cb = sizeof(*pcc);
pcc->iCodePage = IsWindowUnicode(hwndClient) ? CP_WINUNICODE : CP_WINANSI;
}
if ((pInstance->CBFflags & CBF_FAIL_SELFCONNECTIONS) && self)
{
TRACE("Don't do self connection as requested\n");
}
else if (hszApp && hszTop)
{
WDML_SERVER* pServer = (WDML_SERVER*)GetWindowLongPtrW(hwndServer, GWL_WDML_SERVER);
/* check filters for name service */
if (!pServer->filterOn || DdeCmpStringHandles(pServer->hszService, hszApp) == 0)
{
/* pass on to the callback */
hDdeData = WDML_InvokeCallback(pInstance, XTYP_CONNECT,
0, 0, hszTop, hszApp, 0, (ULONG_PTR)pcc, self);
if ((ULONG_PTR)hDdeData)
{
pConv = WDML_CreateServerConv(pInstance, hwndClient, hwndServer,
hszApp, hszTop);
if (pConv)
{
if (pcc) pConv->wStatus |= ST_ISLOCAL;
WDML_InvokeCallback(pInstance, XTYP_CONNECT_CONFIRM, 0, (HCONV)pConv,
hszTop, hszApp, 0, (ULONG_PTR)pcc, self);
}
}
}
}
else if (pInstance->servers)
{
/* pass on to the callback */
hDdeData = WDML_InvokeCallback(pInstance, XTYP_WILDCONNECT,
0, 0, hszTop, hszApp, 0, (ULONG_PTR)pcc, self);
if (hDdeData == CBR_BLOCK)
{
/* MS doc is not consistent here */
FIXME("CBR_BLOCK returned for WILDCONNECT\n");
}
else if ((ULONG_PTR)hDdeData != 0)
{
HSZPAIR* hszp;
hszp = (HSZPAIR*)DdeAccessData(hDdeData, NULL);
if (hszp)
{
int i;
for (i = 0; hszp[i].hszSvc && hszp[i].hszTopic; i++)
{
pConv = WDML_CreateServerConv(pInstance, hwndClient, hwndServer,
hszp[i].hszSvc, hszp[i].hszTopic);
if (pConv)
{
if (pcc) pConv->wStatus |= ST_ISLOCAL;
WDML_InvokeCallback(pInstance, XTYP_CONNECT_CONFIRM, 0, (HCONV)pConv,
hszp[i].hszTopic, hszp[i].hszSvc, 0, (ULONG_PTR)pcc, self);
}
}
DdeUnaccessData(hDdeData);
}
if (!WDML_IsAppOwned(hDdeData)) DdeFreeDataHandle(hDdeData);
}
}
}
return 0;
case WM_DDE_REQUEST:
FIXME("WM_DDE_REQUEST message received!\n");
return 0;
case WM_DDE_ADVISE:
FIXME("WM_DDE_ADVISE message received!\n");
return 0;
case WM_DDE_UNADVISE:
FIXME("WM_DDE_UNADVISE message received!\n");
return 0;
case WM_DDE_EXECUTE:
FIXME("WM_DDE_EXECUTE message received!\n");
return 0;
case WM_DDE_POKE:
FIXME("WM_DDE_POKE message received!\n");
return 0;
case WM_DDE_TERMINATE:
FIXME("WM_DDE_TERMINATE message received!\n");
return 0;
default:
break;
}
return DefWindowProcW(hwndServer, iMsg, wParam, lParam);
}
/******************************************************************
* WDML_ServerQueueRequest
*
*
*/
static WDML_XACT* WDML_ServerQueueRequest(WDML_CONV* pConv, LPARAM lParam)
{
UINT_PTR uiLo, uiHi;
WDML_XACT* pXAct;
UnpackDDElParam(WM_DDE_REQUEST, lParam, &uiLo, &uiHi);
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_REQUEST,
uiLo, WDML_MakeHszFromAtom(pConv->instance, uiHi));
if (pXAct) pXAct->atom = uiHi;
return pXAct;
}
/******************************************************************
* WDML_ServerHandleRequest
*
*
*/
static WDML_QUEUE_STATE WDML_ServerHandleRequest(WDML_CONV* pConv, WDML_XACT* pXAct)
{
HDDEDATA hDdeData = 0;
BOOL fAck = TRUE;
if (!(pConv->instance->CBFflags & CBF_FAIL_REQUESTS))
{
hDdeData = WDML_InvokeCallback(pConv->instance, XTYP_REQUEST, pXAct->wFmt, (HCONV)pConv,
pConv->hszTopic, pXAct->hszItem, 0, 0, 0);
}
switch ((ULONG_PTR)hDdeData)
{
case 0:
TRACE("No data returned from the Callback\n");
fAck = FALSE;
break;
case (ULONG_PTR)CBR_BLOCK:
return WDML_QS_BLOCK;
default:
{
HGLOBAL hMem = WDML_DataHandle2Global(hDdeData, TRUE, FALSE, FALSE, FALSE);
if (!PostMessageW(pConv->hwndClient, WM_DDE_DATA, (WPARAM)pConv->hwndServer,
ReuseDDElParam(pXAct->lParam, WM_DDE_REQUEST, WM_DDE_DATA,
(UINT_PTR)hMem, (UINT_PTR)pXAct->atom)))
{
pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
DdeFreeDataHandle(hDdeData);
GlobalFree(hMem);
fAck = FALSE;
}
}
break;
}
WDML_PostAck(pConv, WDML_SERVER_SIDE, 0, FALSE, fAck, pXAct->atom, pXAct->lParam, WM_DDE_REQUEST);
WDML_DecHSZ(pConv->instance, pXAct->hszItem);
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_ServerQueueAdvise
*
*
*/
static WDML_XACT* WDML_ServerQueueAdvise(WDML_CONV* pConv, LPARAM lParam)
{
UINT_PTR uiLo, uiHi;
WDML_XACT* pXAct;
/* XTYP_ADVSTART transaction:
establish link and save link info to InstanceInfoTable */
if (!UnpackDDElParam(WM_DDE_ADVISE, lParam, &uiLo, &uiHi))
return NULL;
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_ADVISE,
0, WDML_MakeHszFromAtom(pConv->instance, uiHi));
if (pXAct)
{
pXAct->hMem = (HGLOBAL)uiLo;
pXAct->atom = uiHi;
}
return pXAct;
}
/******************************************************************
* WDML_ServerHandleAdvise
*
*
*/
static WDML_QUEUE_STATE WDML_ServerHandleAdvise(WDML_CONV* pConv, WDML_XACT* pXAct)
{
UINT uType;
WDML_LINK* pLink;
DDEADVISE* pDdeAdvise;
HDDEDATA hDdeData = 0;
BOOL fAck = TRUE;
pDdeAdvise = GlobalLock(pXAct->hMem);
uType = XTYP_ADVSTART |
(pDdeAdvise->fDeferUpd ? XTYPF_NODATA : 0) |
(pDdeAdvise->fAckReq ? XTYPF_ACKREQ : 0);
if (!(pConv->instance->CBFflags & CBF_FAIL_ADVISES))
{
hDdeData = WDML_InvokeCallback(pConv->instance, XTYP_ADVSTART, pDdeAdvise->cfFormat,
(HCONV)pConv, pConv->hszTopic, pXAct->hszItem, 0, 0, 0);
}
switch ((ULONG_PTR)hDdeData)
{
case 0:
TRACE("No data returned from the Callback\n");
fAck = FALSE;
break;
case (ULONG_PTR)CBR_BLOCK:
return WDML_QS_BLOCK;
default:
/* billx: first to see if the link is already created. */
pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_SERVER_SIDE,
pXAct->hszItem, TRUE, pDdeAdvise->cfFormat);
if (pLink != NULL)
{
/* we found a link, and only need to modify it in case it changes */
pLink->transactionType = uType;
}
else
{
TRACE("Adding Link with hConv %p\n", pConv);
WDML_AddLink(pConv->instance, (HCONV)pConv, WDML_SERVER_SIDE,
uType, pXAct->hszItem, pDdeAdvise->cfFormat);
}
break;
}
GlobalUnlock(pXAct->hMem);
if (fAck)
{
GlobalFree(pXAct->hMem);
}
pXAct->hMem = 0;
WDML_PostAck(pConv, WDML_SERVER_SIDE, 0, FALSE, fAck, pXAct->atom, pXAct->lParam, WM_DDE_ADVISE);
WDML_DecHSZ(pConv->instance, pXAct->hszItem);
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_ServerQueueUnadvise
*
*
*/
static WDML_XACT* WDML_ServerQueueUnadvise(WDML_CONV* pConv, LPARAM lParam)
{
UINT_PTR uiLo, uiHi;
WDML_XACT* pXAct;
UnpackDDElParam(WM_DDE_UNADVISE, lParam, &uiLo, &uiHi);
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_UNADVISE,
uiLo, WDML_MakeHszFromAtom(pConv->instance, uiHi));
if (pXAct) pXAct->atom = uiHi;
return pXAct;
}
/******************************************************************
* WDML_ServerHandleUnadvise
*
*
*/
static WDML_QUEUE_STATE WDML_ServerHandleUnadvise(WDML_CONV* pConv, WDML_XACT* pXAct)
{
WDML_LINK* pLink;
if (pXAct->hszItem == NULL || pXAct->wFmt == 0)
{
ERR("Unsupported yet options (null item or clipboard format)\n");
return WDML_QS_ERROR;
}
pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_SERVER_SIDE,
pXAct->hszItem, TRUE, pXAct->wFmt);
if (pLink == NULL)
{
ERR("Couln'd find link for %p, dropping request\n", pXAct->hszItem);
FreeDDElParam(WM_DDE_UNADVISE, pXAct->lParam);
return WDML_QS_ERROR;
}
if (!(pConv->instance->CBFflags & CBF_FAIL_ADVISES))
{
WDML_InvokeCallback(pConv->instance, XTYP_ADVSTOP, pXAct->wFmt, (HCONV)pConv,
pConv->hszTopic, pXAct->hszItem, 0, 0, 0);
}
WDML_RemoveLink(pConv->instance, (HCONV)pConv, WDML_SERVER_SIDE,
pXAct->hszItem, pXAct->wFmt);
/* send back ack */
WDML_PostAck(pConv, WDML_SERVER_SIDE, 0, FALSE, TRUE, pXAct->atom,
pXAct->lParam, WM_DDE_UNADVISE);
WDML_DecHSZ(pConv->instance, pXAct->hszItem);
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_QueueExecute
*
*
*/
static WDML_XACT* WDML_ServerQueueExecute(WDML_CONV* pConv, LPARAM lParam)
{
WDML_XACT* pXAct;
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_EXECUTE, 0, 0);
if (pXAct)
{
pXAct->hMem = (HGLOBAL)lParam;
}
return pXAct;
}
static BOOL data_looks_unicode( const WCHAR *data, DWORD size )
{
DWORD i;
if (size % sizeof(WCHAR)) return FALSE;
for (i = 0; i < size / sizeof(WCHAR); i++) if (data[i] > 255) return FALSE;
return TRUE;
}
/* convert data to Unicode, unless it looks like it's already Unicode */
static HDDEDATA map_A_to_W( DWORD instance, void *ptr, DWORD size )
{
HDDEDATA ret;
DWORD len;
const char *end;
if (!data_looks_unicode( ptr, size ))
{
if ((end = memchr( ptr, 0, size ))) size = end + 1 - (const char *)ptr;
len = MultiByteToWideChar( CP_ACP, 0, ptr, size, NULL, 0 );
ret = DdeCreateDataHandle( instance, NULL, len * sizeof(WCHAR), 0, 0, CF_TEXT, 0);
MultiByteToWideChar( CP_ACP, 0, ptr, size, (WCHAR *)DdeAccessData(ret, NULL), len );
}
else ret = DdeCreateDataHandle( instance, ptr, size, 0, 0, CF_TEXT, 0 );
return ret;
}
/* convert data to ASCII, unless it looks like it's not in Unicode format */
static HDDEDATA map_W_to_A( DWORD instance, void *ptr, DWORD size )
{
HDDEDATA ret;
DWORD len;
const WCHAR *end;
if (data_looks_unicode( ptr, size ))
{
size /= sizeof(WCHAR);
if ((end = memchrW( ptr, 0, size ))) size = end + 1 - (const WCHAR *)ptr;
len = WideCharToMultiByte( CP_ACP, 0, ptr, size, NULL, 0, NULL, NULL );
ret = DdeCreateDataHandle( instance, NULL, len, 0, 0, CF_TEXT, 0);
WideCharToMultiByte( CP_ACP, 0, ptr, size, (char *)DdeAccessData(ret, NULL), len, NULL, NULL );
}
else ret = DdeCreateDataHandle( instance, ptr, size, 0, 0, CF_TEXT, 0 );
return ret;
}
/******************************************************************
* WDML_ServerHandleExecute
*
*
*/
static WDML_QUEUE_STATE WDML_ServerHandleExecute(WDML_CONV* pConv, WDML_XACT* pXAct)
{
HDDEDATA hDdeData = DDE_FNOTPROCESSED;
BOOL fAck = FALSE, fBusy = FALSE;
if (!(pConv->instance->CBFflags & CBF_FAIL_EXECUTES))
{
LPVOID ptr = GlobalLock(pXAct->hMem);
DWORD size = GlobalSize(pXAct->hMem);
if (ptr)
{
if (pConv->instance->unicode) /* Unicode server, try to map A->W */
hDdeData = map_A_to_W( pConv->instance->instanceID, ptr, size );
else if (!IsWindowUnicode( pConv->hwndClient )) /* ASCII server and client, try to map W->A */
hDdeData = map_W_to_A( pConv->instance->instanceID, ptr, size );
else
hDdeData = DdeCreateDataHandle(pConv->instance->instanceID, ptr, size, 0, 0, CF_TEXT, 0);
GlobalUnlock(pXAct->hMem);
}
hDdeData = WDML_InvokeCallback(pConv->instance, XTYP_EXECUTE, 0, (HCONV)pConv,
pConv->hszTopic, 0, hDdeData, 0L, 0L);
}
switch ((ULONG_PTR)hDdeData)
{
case (ULONG_PTR)CBR_BLOCK:
return WDML_QS_BLOCK;
case DDE_FACK:
fAck = TRUE;
break;
case DDE_FBUSY:
fBusy = TRUE;
break;
default:
FIXME("Unsupported returned value %p\n", hDdeData);
/* fall through */
case DDE_FNOTPROCESSED:
break;
}
WDML_PostAck(pConv, WDML_SERVER_SIDE, 0, fBusy, fAck, (UINT_PTR)pXAct->hMem, 0, 0);
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_ServerQueuePoke
*
*
*/
static WDML_XACT* WDML_ServerQueuePoke(WDML_CONV* pConv, LPARAM lParam)
{
UINT_PTR uiLo, uiHi;
WDML_XACT* pXAct;
UnpackDDElParam(WM_DDE_POKE, lParam, &uiLo, &uiHi);
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_POKE,
0, WDML_MakeHszFromAtom(pConv->instance, uiHi));
if (pXAct)
{
pXAct->atom = uiHi;
pXAct->hMem = (HGLOBAL)uiLo;
}
return pXAct;
}
/******************************************************************
* WDML_ServerHandlePoke
*
*
*/
static WDML_QUEUE_STATE WDML_ServerHandlePoke(WDML_CONV* pConv, WDML_XACT* pXAct)
{
DDEPOKE* pDdePoke;
HDDEDATA hDdeData;
BOOL fBusy = FALSE, fAck = FALSE;
pDdePoke = GlobalLock(pXAct->hMem);
if (!pDdePoke)
{
return WDML_QS_ERROR;
}
if (!(pConv->instance->CBFflags & CBF_FAIL_POKES))
{
hDdeData = DdeCreateDataHandle(pConv->instance->instanceID, pDdePoke->Value,
GlobalSize(pXAct->hMem) - FIELD_OFFSET(DDEPOKE, Value),
0, 0, pDdePoke->cfFormat, 0);
if (hDdeData)
{
HDDEDATA hDdeDataOut;
hDdeDataOut = WDML_InvokeCallback(pConv->instance, XTYP_POKE, pDdePoke->cfFormat,
(HCONV)pConv, pConv->hszTopic, pXAct->hszItem,
hDdeData, 0, 0);
switch ((ULONG_PTR)hDdeDataOut)
{
case DDE_FACK:
fAck = TRUE;
break;
case DDE_FBUSY:
fBusy = TRUE;
break;
default:
FIXME("Unsupported returned value %p\n", hDdeDataOut);
/* fal through */
case DDE_FNOTPROCESSED:
break;
}
DdeFreeDataHandle(hDdeData);
}
}
GlobalUnlock(pXAct->hMem);
if (!fAck)
{
GlobalFree(pXAct->hMem);
}
WDML_PostAck(pConv, WDML_SERVER_SIDE, 0, fBusy, fAck, pXAct->atom, pXAct->lParam, WM_DDE_POKE);
WDML_DecHSZ(pConv->instance, pXAct->hszItem);
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_ServerQueueTerminate
*
*
*/
static WDML_XACT* WDML_ServerQueueTerminate(WDML_CONV* pConv, LPARAM lParam)
{
WDML_XACT* pXAct;
pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_TERMINATE, 0, 0);
return pXAct;
}
/******************************************************************
* WDML_ServerHandleTerminate
*
*
*/
static WDML_QUEUE_STATE WDML_ServerHandleTerminate(WDML_CONV* pConv, WDML_XACT* pXAct)
{
/* billx: two things to remove: the conv, and associated links.
* Respond with another WM_DDE_TERMINATE iMsg.
*/
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);
}
PostMessageW(pConv->hwndClient, WM_DDE_TERMINATE, (WPARAM)pConv->hwndServer, 0);
WDML_RemoveConv(pConv, WDML_SERVER_SIDE);
return WDML_QS_HANDLED;
}
/******************************************************************
* WDML_ServerHandle
*
*
*/
WDML_QUEUE_STATE WDML_ServerHandle(WDML_CONV* pConv, WDML_XACT* pXAct)
{
WDML_QUEUE_STATE qs = WDML_QS_ERROR;
switch (pXAct->ddeMsg)
{
case WM_DDE_INITIATE:
FIXME("WM_DDE_INITIATE shouldn't be there!\n");
break;
case WM_DDE_REQUEST:
qs = WDML_ServerHandleRequest(pConv, pXAct);
break;
case WM_DDE_ADVISE:
qs = WDML_ServerHandleAdvise(pConv, pXAct);
break;
case WM_DDE_UNADVISE:
qs = WDML_ServerHandleUnadvise(pConv, pXAct);
break;
case WM_DDE_EXECUTE:
qs = WDML_ServerHandleExecute(pConv, pXAct);
break;
case WM_DDE_POKE:
qs = WDML_ServerHandlePoke(pConv, pXAct);
break;
case WM_DDE_TERMINATE:
qs = WDML_ServerHandleTerminate(pConv, pXAct);
break;
case WM_DDE_ACK:
WARN("Shouldn't receive a ACK message (never requests them). Ignoring it\n");
break;
default:
FIXME("Unsupported message %d\n", pXAct->ddeMsg);
}
return qs;
}
/******************************************************************
* WDML_ServerConvProc
*
*
*/
static LRESULT CALLBACK WDML_ServerConvProc(HWND hwndServer, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
WDML_INSTANCE* pInstance;
WDML_CONV* pConv;
WDML_XACT* pXAct = NULL;
TRACE("%p %04x %08lx %08lx\n", hwndServer, iMsg, wParam, lParam);
if (iMsg == WM_DESTROY)
{
pConv = WDML_GetConvFromWnd(hwndServer);
if (pConv && !(pConv->wStatus & ST_TERMINATED))
{
WDML_ServerHandleTerminate(pConv, NULL);
}
}
if (iMsg < WM_DDE_FIRST || iMsg > WM_DDE_LAST)
{
return IsWindowUnicode(hwndServer) ? DefWindowProcW(hwndServer, iMsg, wParam, lParam) :
DefWindowProcA(hwndServer, iMsg, wParam, lParam);
}
pInstance = WDML_GetInstanceFromWnd(hwndServer);
pConv = WDML_GetConvFromWnd(hwndServer);
if (!pConv)
{
ERR("Got a message (%x) on a not known conversation, dropping request\n", iMsg);
return 0;
}
if (pConv->hwndClient != WIN_GetFullHandle( (HWND)wParam ) || pConv->hwndServer != hwndServer)
{
ERR("mismatch between C/S windows and conversation\n");
return 0;
}
if (pConv->instance != pInstance || pConv->instance == NULL)
{
ERR("mismatch in instances\n");
return 0;
}
switch (iMsg)
{
case WM_DDE_INITIATE:
FIXME("WM_DDE_INITIATE message received!\n");
break;
case WM_DDE_REQUEST:
pXAct = WDML_ServerQueueRequest(pConv, lParam);
break;
case WM_DDE_ADVISE:
pXAct = WDML_ServerQueueAdvise(pConv, lParam);
break;
case WM_DDE_UNADVISE:
pXAct = WDML_ServerQueueUnadvise(pConv, lParam);
break;
case WM_DDE_EXECUTE:
pXAct = WDML_ServerQueueExecute(pConv, lParam);
break;
case WM_DDE_POKE:
pXAct = WDML_ServerQueuePoke(pConv, lParam);
break;
case WM_DDE_TERMINATE:
pXAct = WDML_ServerQueueTerminate(pConv, lParam);
break;
case WM_DDE_ACK:
WARN("Shouldn't receive a ACK message (never requests them). Ignoring it\n");
break;
default:
FIXME("Unsupported message %x\n", iMsg);
break;
}
if (pXAct)
{
pXAct->lParam = lParam;
if ((pConv->wStatus & ST_BLOCKED) || WDML_ServerHandle(pConv, pXAct) == WDML_QS_BLOCK)
{
TRACE("Transactions are blocked, add to the queue and exit\n");
WDML_QueueTransaction(pConv, pXAct);
}
else
{
WDML_FreeTransaction(pInstance, pXAct, TRUE);
}
}
else
pConv->instance->lastError = DMLERR_MEMORY_ERROR;
return 0;
}
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