dlls/user32/dde_server.c

   1 /*
   2  * DDEML library
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  * Copyright 1997 Len White
   6  * Copyright 1999 Keith Matthews
   7  * Copyright 2000 Corel
   8  * Copyright 2001 Eric Pouech
   9  * Copyright 2003, 2004, 2005 Dmitry Timoshkov
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  24  */
  25
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "wingdi.h"
  31 #include "winuser.h"
  32 #include "dde.h"
  33 #include "ddeml.h"
  34 #include "win.h"
  35 #include "wine/debug.h"
  36 #include "dde_private.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(ddeml);
  39
  40 static const WCHAR szServerNameClass[] = {'W','i','n','e','D','d','e','S','e','r','v','e','r','N','a','m','e',0};
  41 const char WDML_szServerConvClassA[] = "WineDdeServerConvA";
  42 const WCHAR WDML_szServerConvClassW[] = {'W','i','n','e','D','d','e','S','e','r','v','e','r','C','o','n','v','W',0};
  43
  44 static LRESULT CALLBACK WDML_ServerNameProc(HWND, UINT, WPARAM, LPARAM);
  45 static LRESULT CALLBACK WDML_ServerConvProc(HWND, UINT, WPARAM, LPARAM);
  46
  47 /******************************************************************************
  48  * DdePostAdvise [USER32.@]  Send transaction to DDE callback function.
  49  *
  50  * PARAMS
  51  *      idInst    [I] Instance identifier
  52  *      hszTopic  [I] Handle to topic name string
  53  *      hszItem   [I] Handle to item name string
  54  *
  55  * RETURNS
  56  *    Success: TRUE
  57  *    Failure: FALSE
  58  */
  59 BOOL WINAPI DdePostAdvise(DWORD idInst, HSZ hszTopic, HSZ hszItem)
  60 {
  61     WDML_INSTANCE*      pInstance = NULL;
  62     WDML_LINK*          pLink = NULL;
  63     HDDEDATA            hDdeData = 0;
  64     HGLOBAL             hItemData = 0;
  65     WDML_CONV*          pConv = NULL;
  66     ATOM                atom = 0;
  67     UINT                count;
  68
  69     TRACE("(%d,%p,%p)\n", idInst, hszTopic, hszItem);
  70
  71     pInstance = WDML_GetInstance(idInst);
  72
  73     if (pInstance == NULL || pInstance->links == NULL)
  74         return FALSE;
  75
  76     atom = WDML_MakeAtomFromHsz(hszItem);
  77     if (!atom) return FALSE;
  78
  79     /* first compute the number of links which will trigger a message */
  80     count = 0;
  81     for (pLink = pInstance->links[WDML_SERVER_SIDE]; pLink != NULL; pLink = pLink->next)
  82     {
  83         if (DdeCmpStringHandles(hszItem, pLink->hszItem) == 0)
  84         {
  85             count++;
  86         }
  87     }
  88     if (count >= CADV_LATEACK)
  89     {
  90         FIXME("too high value for count\n");
  91         count &= 0xFFFF;
  92     }
  93
  94     for (pLink = pInstance->links[WDML_SERVER_SIDE]; pLink != NULL; pLink = pLink->next)
  95     {
  96         if (DdeCmpStringHandles(hszItem, pLink->hszItem) == 0)
  97         {
  98             hDdeData = WDML_InvokeCallback(pInstance, XTYP_ADVREQ, pLink->uFmt, pLink->hConv,
  99                                            hszTopic, hszItem, 0, --count, 0);
 100
 101             if (hDdeData == CBR_BLOCK)
 102             {
 103                 /* MS doc is not consistent here */
 104                 FIXME("CBR_BLOCK returned for ADVREQ\n");
 105                 continue;
 106             }
 107             if (hDdeData)
 108             {
 109                 if (pLink->transactionType & XTYPF_NODATA)
 110                 {
 111                     TRACE("no data\n");
 112                     hItemData = 0;
 113                 }
 114                 else
 115                 {
 116                     TRACE("with data\n");
 117
 118                     hItemData = WDML_DataHandle2Global(hDdeData, FALSE, FALSE, FALSE, FALSE);
 119                 }
 120
 121                 pConv = WDML_GetConv(pLink->hConv, TRUE);
 122
 123                 if (pConv == NULL)
 124                 {
 125                     if (!WDML_IsAppOwned(hDdeData))  DdeFreeDataHandle(hDdeData);
 126                     goto theError;
 127                 }
 128
 129                 if (!PostMessageW(pConv->hwndClient, WM_DDE_DATA, (WPARAM)pConv->hwndServer,
 130                                   PackDDElParam(WM_DDE_DATA, (UINT_PTR)hItemData, atom)))
 131                 {
 132                     ERR("post message failed\n");
 133                     pConv->wStatus &= ~ST_CONNECTED;
 134                     pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
 135                     if (!WDML_IsAppOwned(hDdeData))  DdeFreeDataHandle(hDdeData);
 136                     GlobalFree(hItemData);
 137                     goto theError;
 138                 }
 139                 if (!WDML_IsAppOwned(hDdeData))  DdeFreeDataHandle(hDdeData);
 140             }
 141         }
 142     }
 143     return TRUE;
 144
 145  theError:
 146     if (atom) GlobalDeleteAtom(atom);
 147     return FALSE;
 148 }
 149
 150
 151 /******************************************************************************
 152  * DdeNameService [USER32.@]  {Un}registers service name of DDE server
 153  *
 154  * PARAMS
 155  *    idInst [I] Instance identifier
 156  *    hsz1   [I] Handle to service name string
 157  *    hsz2   [I] Reserved
 158  *    afCmd  [I] Service name flags
 159  *
 160  * RETURNS
 161  *    Success: Non-zero
 162  *    Failure: 0
 163  */
 164 HDDEDATA WINAPI DdeNameService(DWORD idInst, HSZ hsz1, HSZ hsz2, UINT afCmd)
 165 {
 166     WDML_SERVER*        pServer;
 167     WDML_INSTANCE*      pInstance;
 168     HWND                hwndServer;
 169     WNDCLASSEXW         wndclass;
 170
 171     TRACE("(%d,%p,%p,%x)\n", idInst, hsz1, hsz2, afCmd);
 172
 173     /*  First check instance
 174      */
 175     pInstance = WDML_GetInstance(idInst);
 176     if  (pInstance == NULL)
 177     {
 178         TRACE("Instance not found as initialised\n");
 179         /*  Nothing has been initialised - exit now ! can return TRUE since effect is the same */
 180         return NULL;
 181     }
 182
 183     if (hsz2 != 0L)
 184     {
 185         /*      Illegal, reserved parameter
 186          */
 187         pInstance->lastError = DMLERR_INVALIDPARAMETER;
 188         WARN("Reserved parameter no-zero !!\n");
 189         return NULL;
 190     }
 191     if (hsz1 == 0 && !(afCmd & DNS_UNREGISTER))
 192     {
 193         /*      don't know if we should check this but it makes sense
 194          *      why supply REGISTER or filter flags if de-registering all
 195          */
 196         TRACE("General unregister unexpected flags\n");
 197         pInstance->lastError = DMLERR_INVALIDPARAMETER;
 198         return NULL;
 199     }
 200
 201     switch (afCmd & (DNS_REGISTER | DNS_UNREGISTER))
 202     {
 203     case DNS_REGISTER:
 204         pServer = WDML_FindServer(pInstance, hsz1, 0);
 205         if (pServer)
 206         {
 207             ERR("Trying to register already registered service!\n");
 208             pInstance->lastError = DMLERR_DLL_USAGE;
 209             return NULL;
 210         }
 211
 212         TRACE("Adding service name\n");
 213
 214         WDML_IncHSZ(pInstance, hsz1);
 215
 216         pServer = WDML_AddServer(pInstance, hsz1, 0);
 217
 218         WDML_BroadcastDDEWindows(WDML_szEventClass, WM_WDML_REGISTER,
 219                                  pServer->atomService, pServer->atomServiceSpec);
 220
 221         wndclass.cbSize        = sizeof(wndclass);
 222         wndclass.style         = 0;
 223         wndclass.lpfnWndProc   = WDML_ServerNameProc;
 224         wndclass.cbClsExtra    = 0;
 225         wndclass.cbWndExtra    = 2 * sizeof(ULONG_PTR);
 226         wndclass.hInstance     = 0;
 227         wndclass.hIcon         = 0;
 228         wndclass.hCursor       = 0;
 229         wndclass.hbrBackground = 0;
 230         wndclass.lpszMenuName  = NULL;
 231         wndclass.lpszClassName = szServerNameClass;
 232         wndclass.hIconSm       = 0;
 233
 234         RegisterClassExW(&wndclass);
 235
 236         hwndServer = CreateWindowW(szServerNameClass, NULL,
 237                                    WS_POPUP, 0, 0, 0, 0,
 238                                    0, 0, 0, 0);
 239
 240         SetWindowLongPtrW(hwndServer, GWL_WDML_INSTANCE, (ULONG_PTR)pInstance);
 241         SetWindowLongPtrW(hwndServer, GWL_WDML_SERVER, (ULONG_PTR)pServer);
 242         TRACE("Created nameServer=%p for instance=%08x\n", hwndServer, idInst);
 243
 244         pServer->hwndServer = hwndServer;
 245         break;
 246
 247     case DNS_UNREGISTER:
 248         if (hsz1 == 0L)
 249         {
 250             /* General unregister situation
 251              * terminate all server side pending conversations
 252              */
 253             while (pInstance->servers)
 254                 WDML_RemoveServer(pInstance, pInstance->servers->hszService, 0);
 255             pInstance->servers = NULL;
 256             TRACE("General de-register - finished\n");
 257         }
 258         else
 259         {
 260             WDML_RemoveServer(pInstance, hsz1, 0L);
 261         }
 262         break;
 263     }
 264
 265     if (afCmd & (DNS_FILTERON | DNS_FILTEROFF))
 266     {
 267         /*      Set filter flags on to hold notifications of connection
 268          */
 269         pServer = WDML_FindServer(pInstance, hsz1, 0);
 270         if (!pServer)
 271         {
 272             /*  trying to filter where no service names !!
 273              */
 274             pInstance->lastError = DMLERR_DLL_USAGE;
 275             return NULL;
 276         }
 277         else
 278         {
 279             pServer->filterOn = (afCmd & DNS_FILTERON) != 0;
 280         }
 281     }
 282     return (HDDEDATA)TRUE;
 283 }
 284
 285 /******************************************************************
 286  *              WDML_CreateServerConv
 287  *
 288  *
 289  */
 290 static WDML_CONV* WDML_CreateServerConv(WDML_INSTANCE* pInstance, HWND hwndClient,
 291                                         HWND hwndServerName, HSZ hszApp, HSZ hszTopic)
 292 {
 293     HWND        hwndServerConv;
 294     WDML_CONV*  pConv;
 295
 296     if (pInstance->unicode)
 297     {
 298         WNDCLASSEXW wndclass;
 299
 300         wndclass.cbSize        = sizeof(wndclass);
 301         wndclass.style         = 0;
 302         wndclass.lpfnWndProc   = WDML_ServerConvProc;
 303         wndclass.cbClsExtra    = 0;
 304         wndclass.cbWndExtra    = 2 * sizeof(ULONG_PTR);
 305         wndclass.hInstance     = 0;
 306         wndclass.hIcon         = 0;
 307         wndclass.hCursor       = 0;
 308         wndclass.hbrBackground = 0;
 309         wndclass.lpszMenuName  = NULL;
 310         wndclass.lpszClassName = WDML_szServerConvClassW;
 311         wndclass.hIconSm       = 0;
 312
 313         RegisterClassExW(&wndclass);
 314
 315         hwndServerConv = CreateWindowW(WDML_szServerConvClassW, 0,
 316                                        WS_CHILD, 0, 0, 0, 0,
 317                                        hwndServerName, 0, 0, 0);
 318     }
 319     else
 320     {
 321         WNDCLASSEXA wndclass;
 322
 323         wndclass.cbSize        = sizeof(wndclass);
 324         wndclass.style         = 0;
 325         wndclass.lpfnWndProc   = WDML_ServerConvProc;
 326         wndclass.cbClsExtra    = 0;
 327         wndclass.cbWndExtra    = 2 * sizeof(ULONG_PTR);
 328         wndclass.hInstance     = 0;
 329         wndclass.hIcon         = 0;
 330         wndclass.hCursor       = 0;
 331         wndclass.hbrBackground = 0;
 332         wndclass.lpszMenuName  = NULL;
 333         wndclass.lpszClassName = WDML_szServerConvClassA;
 334         wndclass.hIconSm       = 0;
 335
 336         RegisterClassExA(&wndclass);
 337
 338         hwndServerConv = CreateWindowA(WDML_szServerConvClassA, 0,
 339                                       WS_CHILD, 0, 0, 0, 0,
 340                                       hwndServerName, 0, 0, 0);
 341     }
 342
 343     TRACE("Created convServer=%p (nameServer=%p) for instance=%08x unicode=%d\n",
 344           hwndServerConv, hwndServerName, pInstance->instanceID, pInstance->unicode);
 345
 346     pConv = WDML_AddConv(pInstance, WDML_SERVER_SIDE, hszApp, hszTopic,
 347                          hwndClient, hwndServerConv);
 348     if (pConv)
 349     {
 350         SetWindowLongPtrW(hwndServerConv, GWL_WDML_INSTANCE, (ULONG_PTR)pInstance);
 351         SetWindowLongPtrW(hwndServerConv, GWL_WDML_CONVERSATION, (ULONG_PTR)pConv);
 352
 353         /* this should be the only place using SendMessage for WM_DDE_ACK */
 354         /* note: sent messages shall not use packing */
 355         SendMessageW(hwndClient, WM_DDE_ACK, (WPARAM)hwndServerConv,
 356                      MAKELPARAM(WDML_MakeAtomFromHsz(hszApp), WDML_MakeAtomFromHsz(hszTopic)));
 357         /* we assume we're connected since we've sent an answer...
 358          * I'm not sure what we can do... it doesn't look like the return value
 359          * of SendMessage is used... sigh...
 360          */
 361         pConv->wStatus |= ST_CONNECTED;
 362     }
 363     else
 364     {
 365         DestroyWindow(hwndServerConv);
 366     }
 367     return pConv;
 368 }
 369
 370 /******************************************************************
 371  *              WDML_ServerNameProc
 372  *
 373  *
 374  */
 375 static LRESULT CALLBACK WDML_ServerNameProc(HWND hwndServer, UINT iMsg, WPARAM wParam, LPARAM lParam)
 376 {
 377     HWND                hwndClient;
 378     HSZ                 hszApp, hszTop;
 379     HDDEDATA            hDdeData = 0;
 380     WDML_INSTANCE*      pInstance;
 381     UINT_PTR            uiLo, uiHi;
 382
 383     switch (iMsg)
 384     {
 385     case WM_DDE_INITIATE:
 386
 387         /* wParam         -- sending window handle
 388            LOWORD(lParam) -- application atom
 389            HIWORD(lParam) -- topic atom */
 390
 391         TRACE("WM_DDE_INITIATE message received!\n");
 392         hwndClient = (HWND)wParam;
 393
 394         pInstance = WDML_GetInstanceFromWnd(hwndServer);
 395         TRACE("idInst=%d, threadID=0x%x\n", pInstance->instanceID, GetCurrentThreadId());
 396         if (!pInstance) return 0;
 397
 398         /* don't free DDEParams, since this is a broadcast */
 399         UnpackDDElParam(WM_DDE_INITIATE, lParam, &uiLo, &uiHi);
 400
 401         hszApp = WDML_MakeHszFromAtom(pInstance, uiLo);
 402         hszTop = WDML_MakeHszFromAtom(pInstance, uiHi);
 403
 404         if (!(pInstance->CBFflags & CBF_FAIL_CONNECTIONS))
 405         {
 406             BOOL                self = FALSE;
 407             CONVCONTEXT         cc;
 408             CONVCONTEXT*        pcc = NULL;
 409             WDML_CONV*          pConv;
 410             char                buf[256];
 411
 412             if (GetWindowThreadProcessId(hwndClient, NULL) == GetWindowThreadProcessId(hwndServer, NULL) &&
 413                 WDML_GetInstanceFromWnd(hwndClient) == WDML_GetInstanceFromWnd(hwndServer))
 414             {
 415                 self = TRUE;
 416             }
 417             /* FIXME: so far, we don't grab distant convcontext, so only check if remote is
 418              * handled under DDEML, and if so build a default context
 419              */
 420            if ((GetClassNameA(hwndClient, buf, sizeof(buf)) &&
 421                 lstrcmpiA(buf, WDML_szClientConvClassA) == 0) ||
 422                (GetClassNameW(hwndClient, (LPWSTR)buf, sizeof(buf)/sizeof(WCHAR)) &&
 423                 lstrcmpiW((LPWSTR)buf, WDML_szClientConvClassW) == 0))
 424             {
 425                 pcc = &cc;
 426                 memset(pcc, 0, sizeof(*pcc));
 427                 pcc->cb = sizeof(*pcc);
 428                 pcc->iCodePage = IsWindowUnicode(hwndClient) ? CP_WINUNICODE : CP_WINANSI;
 429             }
 430             if ((pInstance->CBFflags & CBF_FAIL_SELFCONNECTIONS) && self)
 431             {
 432                 TRACE("Don't do self connection as requested\n");
 433             }
 434             else if (hszApp && hszTop)
 435             {
 436                 WDML_SERVER*    pServer = (WDML_SERVER*)GetWindowLongPtrW(hwndServer, GWL_WDML_SERVER);
 437
 438                 /* check filters for name service */
 439                 if (!pServer->filterOn || DdeCmpStringHandles(pServer->hszService, hszApp) == 0)
 440                 {
 441                     /* pass on to the callback  */
 442                     hDdeData = WDML_InvokeCallback(pInstance, XTYP_CONNECT,
 443                                                    0, 0, hszTop, hszApp, 0, (ULONG_PTR)pcc, self);
 444                     if ((ULONG_PTR)hDdeData)
 445                     {
 446                         pConv = WDML_CreateServerConv(pInstance, hwndClient, hwndServer,
 447                                                       hszApp, hszTop);
 448                         if (pConv)
 449                         {
 450                             if (pcc) pConv->wStatus |= ST_ISLOCAL;
 451                             WDML_InvokeCallback(pInstance, XTYP_CONNECT_CONFIRM, 0, (HCONV)pConv,
 452                                                 hszTop, hszApp, 0, (ULONG_PTR)pcc, self);
 453                         }
 454                     }
 455                 }
 456             }
 457             else if (pInstance->servers)
 458             {
 459                 /* pass on to the callback  */
 460                 hDdeData = WDML_InvokeCallback(pInstance, XTYP_WILDCONNECT,
 461                                                0, 0, hszTop, hszApp, 0, (ULONG_PTR)pcc, self);
 462
 463                 if (hDdeData == CBR_BLOCK)
 464                 {
 465                     /* MS doc is not consistent here */
 466                     FIXME("CBR_BLOCK returned for WILDCONNECT\n");
 467                 }
 468                 else if ((ULONG_PTR)hDdeData != 0)
 469                 {
 470                     HSZPAIR*    hszp;
 471
 472                     hszp = (HSZPAIR*)DdeAccessData(hDdeData, NULL);
 473                     if (hszp)
 474                     {
 475                         int     i;
 476                         for (i = 0; hszp[i].hszSvc && hszp[i].hszTopic; i++)
 477                         {
 478                             pConv = WDML_CreateServerConv(pInstance, hwndClient, hwndServer,
 479                                                           hszp[i].hszSvc, hszp[i].hszTopic);
 480                             if (pConv)
 481                             {
 482                                 if (pcc) pConv->wStatus |= ST_ISLOCAL;
 483                                 WDML_InvokeCallback(pInstance, XTYP_CONNECT_CONFIRM, 0, (HCONV)pConv,
 484                                                     hszp[i].hszTopic, hszp[i].hszSvc, 0, (ULONG_PTR)pcc, self);
 485                             }
 486                         }
 487                         DdeUnaccessData(hDdeData);
 488                     }
 489                     if (!WDML_IsAppOwned(hDdeData)) DdeFreeDataHandle(hDdeData);
 490                 }
 491             }
 492         }
 493
 494         return 0;
 495
 496     case WM_DDE_REQUEST:
 497         FIXME("WM_DDE_REQUEST message received!\n");
 498         return 0;
 499     case WM_DDE_ADVISE:
 500         FIXME("WM_DDE_ADVISE message received!\n");
 501         return 0;
 502     case WM_DDE_UNADVISE:
 503         FIXME("WM_DDE_UNADVISE message received!\n");
 504         return 0;
 505     case WM_DDE_EXECUTE:
 506         FIXME("WM_DDE_EXECUTE message received!\n");
 507         return 0;
 508     case WM_DDE_POKE:
 509         FIXME("WM_DDE_POKE message received!\n");
 510         return 0;
 511     case WM_DDE_TERMINATE:
 512         FIXME("WM_DDE_TERMINATE message received!\n");
 513         return 0;
 514     default:
 515         break;
 516     }
 517
 518     return DefWindowProcW(hwndServer, iMsg, wParam, lParam);
 519 }
 520
 521 /******************************************************************
 522  *              WDML_ServerQueueRequest
 523  *
 524  *
 525  */
 526 static  WDML_XACT*      WDML_ServerQueueRequest(WDML_CONV* pConv, LPARAM lParam)
 527 {
 528     UINT_PTR            uiLo, uiHi;
 529     WDML_XACT*          pXAct;
 530
 531     UnpackDDElParam(WM_DDE_REQUEST, lParam, &uiLo, &uiHi);
 532
 533     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_REQUEST,
 534                                   uiLo, WDML_MakeHszFromAtom(pConv->instance, uiHi));
 535     if (pXAct) pXAct->atom = uiHi;
 536     return pXAct;
 537 }
 538
 539 /******************************************************************
 540  *              WDML_ServerHandleRequest
 541  *
 542  *
 543  */
 544 static  WDML_QUEUE_STATE WDML_ServerHandleRequest(WDML_CONV* pConv, WDML_XACT* pXAct)
 545 {
 546     HDDEDATA            hDdeData = 0;
 547     BOOL                fAck = TRUE;
 548
 549     if (!(pConv->instance->CBFflags & CBF_FAIL_REQUESTS))
 550     {
 551
 552         hDdeData = WDML_InvokeCallback(pConv->instance, XTYP_REQUEST, pXAct->wFmt, (HCONV)pConv,
 553                                        pConv->hszTopic, pXAct->hszItem, 0, 0, 0);
 554     }
 555
 556     switch ((ULONG_PTR)hDdeData)
 557     {
 558     case 0:
 559         TRACE("No data returned from the Callback\n");
 560         fAck = FALSE;
 561         break;
 562
 563     case (ULONG_PTR)CBR_BLOCK:
 564         return WDML_QS_BLOCK;
 565
 566     default:
 567         {
 568             HGLOBAL     hMem = WDML_DataHandle2Global(hDdeData, TRUE, FALSE, FALSE, FALSE);
 569             if (!PostMessageW(pConv->hwndClient, WM_DDE_DATA, (WPARAM)pConv->hwndServer,
 570                               ReuseDDElParam(pXAct->lParam, WM_DDE_REQUEST, WM_DDE_DATA,
 571                                              (UINT_PTR)hMem, (UINT_PTR)pXAct->atom)))
 572             {
 573                 pConv->instance->lastError = DMLERR_POSTMSG_FAILED;
 574                 DdeFreeDataHandle(hDdeData);
 575                 GlobalFree(hMem);
 576                 fAck = FALSE;
 577             }
 578         }
 579         break;
 580     }
 581
 582     WDML_PostAck(pConv, WDML_SERVER_SIDE, 0, FALSE, fAck, pXAct->atom, pXAct->lParam, WM_DDE_REQUEST);
 583
 584     WDML_DecHSZ(pConv->instance, pXAct->hszItem);
 585
 586     return WDML_QS_HANDLED;
 587 }
 588
 589 /******************************************************************
 590  *              WDML_ServerQueueAdvise
 591  *
 592  *
 593  */
 594 static  WDML_XACT*      WDML_ServerQueueAdvise(WDML_CONV* pConv, LPARAM lParam)
 595 {
 596     UINT_PTR            uiLo, uiHi;
 597     WDML_XACT*          pXAct;
 598
 599     /* XTYP_ADVSTART transaction:
 600        establish link and save link info to InstanceInfoTable */
 601
 602     if (!UnpackDDElParam(WM_DDE_ADVISE, lParam, &uiLo, &uiHi))
 603         return NULL;
 604
 605     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_ADVISE,
 606                                   0, WDML_MakeHszFromAtom(pConv->instance, uiHi));
 607     if (pXAct)
 608     {
 609         pXAct->hMem = (HGLOBAL)uiLo;
 610         pXAct->atom = uiHi;
 611     }
 612     return pXAct;
 613 }
 614
 615 /******************************************************************
 616  *              WDML_ServerHandleAdvise
 617  *
 618  *
 619  */
 620 static  WDML_QUEUE_STATE WDML_ServerHandleAdvise(WDML_CONV* pConv, WDML_XACT* pXAct)
 621 {
 622     UINT                uType;
 623     WDML_LINK*          pLink;
 624     DDEADVISE*          pDdeAdvise;
 625     HDDEDATA            hDdeData = 0;
 626     BOOL                fAck = TRUE;
 627
 628     pDdeAdvise = GlobalLock(pXAct->hMem);
 629     uType = XTYP_ADVSTART |
 630             (pDdeAdvise->fDeferUpd ? XTYPF_NODATA : 0) |
 631             (pDdeAdvise->fAckReq ? XTYPF_ACKREQ : 0);
 632
 633     if (!(pConv->instance->CBFflags & CBF_FAIL_ADVISES))
 634     {
 635         hDdeData = WDML_InvokeCallback(pConv->instance, XTYP_ADVSTART, pDdeAdvise->cfFormat,
 636                                        (HCONV)pConv, pConv->hszTopic, pXAct->hszItem, 0, 0, 0);
 637     }
 638
 639     switch ((ULONG_PTR)hDdeData)
 640     {
 641     case 0:
 642         TRACE("No data returned from the Callback\n");
 643         fAck = FALSE;
 644         break;
 645
 646     case (ULONG_PTR)CBR_BLOCK:
 647         return WDML_QS_BLOCK;
 648
 649     default:
 650         /* billx: first to see if the link is already created. */
 651         pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_SERVER_SIDE,
 652                               pXAct->hszItem, TRUE, pDdeAdvise->cfFormat);
 653
 654         if (pLink != NULL)
 655         {
 656             /* we found a link, and only need to modify it in case it changes */
 657             pLink->transactionType = uType;
 658         }
 659         else
 660         {
 661             TRACE("Adding Link with hConv %p\n", pConv);
 662             WDML_AddLink(pConv->instance, (HCONV)pConv, WDML_SERVER_SIDE,
 663                          uType, pXAct->hszItem, pDdeAdvise->cfFormat);
 664         }
 665         break;
 666     }
 667
 668     GlobalUnlock(pXAct->hMem);
 669     if (fAck)
 670     {
 671         GlobalFree(pXAct->hMem);
 672     }
 673     pXAct->hMem = 0;
 674
 675     WDML_PostAck(pConv, WDML_SERVER_SIDE, 0, FALSE, fAck, pXAct->atom, pXAct->lParam, WM_DDE_ADVISE);
 676
 677     WDML_DecHSZ(pConv->instance, pXAct->hszItem);
 678
 679     return WDML_QS_HANDLED;
 680 }
 681
 682 /******************************************************************
 683  *              WDML_ServerQueueUnadvise
 684  *
 685  *
 686  */
 687 static  WDML_XACT* WDML_ServerQueueUnadvise(WDML_CONV* pConv, LPARAM lParam)
 688 {
 689     UINT_PTR            uiLo, uiHi;
 690     WDML_XACT*          pXAct;
 691
 692     UnpackDDElParam(WM_DDE_UNADVISE, lParam, &uiLo, &uiHi);
 693
 694     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_UNADVISE,
 695                                   uiLo, WDML_MakeHszFromAtom(pConv->instance, uiHi));
 696     if (pXAct) pXAct->atom = uiHi;
 697     return pXAct;
 698 }
 699
 700 /******************************************************************
 701  *              WDML_ServerHandleUnadvise
 702  *
 703  *
 704  */
 705 static  WDML_QUEUE_STATE WDML_ServerHandleUnadvise(WDML_CONV* pConv, WDML_XACT* pXAct)
 706 {
 707     WDML_LINK*  pLink;
 708
 709     if (pXAct->hszItem == NULL || pXAct->wFmt == 0)
 710     {
 711         ERR("Unsupported yet options (null item or clipboard format)\n");
 712         return WDML_QS_ERROR;
 713     }
 714
 715     pLink = WDML_FindLink(pConv->instance, (HCONV)pConv, WDML_SERVER_SIDE,
 716                           pXAct->hszItem, TRUE, pXAct->wFmt);
 717     if (pLink == NULL)
 718     {
 719         ERR("Couln'd find link for %p, dropping request\n", pXAct->hszItem);
 720         FreeDDElParam(WM_DDE_UNADVISE, pXAct->lParam);
 721         return WDML_QS_ERROR;
 722     }
 723
 724     if (!(pConv->instance->CBFflags & CBF_FAIL_ADVISES))
 725     {
 726         WDML_InvokeCallback(pConv->instance, XTYP_ADVSTOP, pXAct->wFmt, (HCONV)pConv,
 727                             pConv->hszTopic, pXAct->hszItem, 0, 0, 0);
 728     }
 729
 730     WDML_RemoveLink(pConv->instance, (HCONV)pConv, WDML_SERVER_SIDE,
 731                     pXAct->hszItem, pXAct->wFmt);
 732
 733     /* send back ack */
 734     WDML_PostAck(pConv, WDML_SERVER_SIDE, 0, FALSE, TRUE, pXAct->atom,
 735                  pXAct->lParam, WM_DDE_UNADVISE);
 736
 737     WDML_DecHSZ(pConv->instance, pXAct->hszItem);
 738
 739     return WDML_QS_HANDLED;
 740 }
 741
 742 /******************************************************************
 743  *              WDML_QueueExecute
 744  *
 745  *
 746  */
 747 static  WDML_XACT* WDML_ServerQueueExecute(WDML_CONV* pConv, LPARAM lParam)
 748 {
 749     WDML_XACT*  pXAct;
 750
 751     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_EXECUTE, 0, 0);
 752     if (pXAct)
 753     {
 754         pXAct->hMem    = (HGLOBAL)lParam;
 755     }
 756     return pXAct;
 757 }
 758
 759  /******************************************************************
 760  *              WDML_ServerHandleExecute
 761  *
 762  *
 763  */
 764 static  WDML_QUEUE_STATE WDML_ServerHandleExecute(WDML_CONV* pConv, WDML_XACT* pXAct)
 765 {
 766     HDDEDATA    hDdeData = DDE_FNOTPROCESSED;
 767     BOOL        fAck = FALSE, fBusy = FALSE;
 768
 769     if (!(pConv->instance->CBFflags & CBF_FAIL_EXECUTES))
 770     {
 771         LPVOID  ptr = GlobalLock(pXAct->hMem);
 772
 773         if (ptr)
 774         {
 775             hDdeData = DdeCreateDataHandle(0, ptr, GlobalSize(pXAct->hMem),
 776                                            0, 0, CF_TEXT, 0);
 777             GlobalUnlock(pXAct->hMem);
 778         }
 779         hDdeData = WDML_InvokeCallback(pConv->instance, XTYP_EXECUTE, 0, (HCONV)pConv,
 780                                        pConv->hszTopic, 0, hDdeData, 0L, 0L);
 781     }
 782
 783     switch ((ULONG_PTR)hDdeData)
 784     {
 785     case (ULONG_PTR)CBR_BLOCK:
 786         return WDML_QS_BLOCK;
 787
 788     case DDE_FACK:
 789         fAck = TRUE;
 790         break;
 791     case DDE_FBUSY:
 792         fBusy = TRUE;
 793         break;
 794     default:
 795         FIXME("Unsupported returned value %p\n", hDdeData);
 796         /* fall through */
 797     case DDE_FNOTPROCESSED:
 798         break;
 799     }
 800     WDML_PostAck(pConv, WDML_SERVER_SIDE, 0, fBusy, fAck, (UINT_PTR)pXAct->hMem, 0, 0);
 801
 802     return WDML_QS_HANDLED;
 803 }
 804
 805 /******************************************************************
 806  *              WDML_ServerQueuePoke
 807  *
 808  *
 809  */
 810 static  WDML_XACT* WDML_ServerQueuePoke(WDML_CONV* pConv, LPARAM lParam)
 811 {
 812     UINT_PTR            uiLo, uiHi;
 813     WDML_XACT*          pXAct;
 814
 815     UnpackDDElParam(WM_DDE_POKE, lParam, &uiLo, &uiHi);
 816
 817     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_POKE,
 818                                   0, WDML_MakeHszFromAtom(pConv->instance, uiHi));
 819     if (pXAct)
 820     {
 821         pXAct->atom = uiHi;
 822         pXAct->hMem = (HGLOBAL)uiLo;
 823     }
 824     return pXAct;
 825 }
 826
 827 /******************************************************************
 828  *              WDML_ServerHandlePoke
 829  *
 830  *
 831  */
 832 static  WDML_QUEUE_STATE WDML_ServerHandlePoke(WDML_CONV* pConv, WDML_XACT* pXAct)
 833 {
 834     DDEPOKE*            pDdePoke;
 835     HDDEDATA            hDdeData;
 836     BOOL                fBusy = FALSE, fAck = FALSE;
 837
 838     pDdePoke = GlobalLock(pXAct->hMem);
 839     if (!pDdePoke)
 840     {
 841         return WDML_QS_ERROR;
 842     }
 843
 844     if (!(pConv->instance->CBFflags & CBF_FAIL_POKES))
 845     {
 846         hDdeData = DdeCreateDataHandle(pConv->instance->instanceID, pDdePoke->Value,
 847                                        GlobalSize(pXAct->hMem) - FIELD_OFFSET(DDEPOKE, Value),
 848                                        0, 0, pDdePoke->cfFormat, 0);
 849         if (hDdeData)
 850         {
 851             HDDEDATA    hDdeDataOut;
 852
 853             hDdeDataOut = WDML_InvokeCallback(pConv->instance, XTYP_POKE, pDdePoke->cfFormat,
 854                                               (HCONV)pConv, pConv->hszTopic, pXAct->hszItem,
 855                                               hDdeData, 0, 0);
 856             switch ((ULONG_PTR)hDdeDataOut)
 857             {
 858             case DDE_FACK:
 859                 fAck = TRUE;
 860                 break;
 861             case DDE_FBUSY:
 862                 fBusy = TRUE;
 863                 break;
 864             default:
 865                 FIXME("Unsupported returned value %p\n", hDdeDataOut);
 866                 /* fal through */
 867             case DDE_FNOTPROCESSED:
 868                 break;
 869             }
 870             DdeFreeDataHandle(hDdeData);
 871         }
 872     }
 873     GlobalUnlock(pXAct->hMem);
 874
 875     if (!fAck)
 876     {
 877         GlobalFree(pXAct->hMem);
 878     }
 879     WDML_PostAck(pConv, WDML_SERVER_SIDE, 0, fBusy, fAck, pXAct->atom, pXAct->lParam, WM_DDE_POKE);
 880
 881     WDML_DecHSZ(pConv->instance, pXAct->hszItem);
 882
 883     return WDML_QS_HANDLED;
 884 }
 885
 886 /******************************************************************
 887  *              WDML_ServerQueueTerminate
 888  *
 889  *
 890  */
 891 static  WDML_XACT*      WDML_ServerQueueTerminate(WDML_CONV* pConv, LPARAM lParam)
 892 {
 893     WDML_XACT*  pXAct;
 894
 895     pXAct = WDML_AllocTransaction(pConv->instance, WM_DDE_TERMINATE, 0, 0);
 896     return pXAct;
 897 }
 898
 899 /******************************************************************
 900  *              WDML_ServerHandleTerminate
 901  *
 902  *
 903  */
 904 static  WDML_QUEUE_STATE WDML_ServerHandleTerminate(WDML_CONV* pConv, WDML_XACT* pXAct)
 905 {
 906     /* billx: two things to remove: the conv, and associated links.
 907      * Respond with another WM_DDE_TERMINATE iMsg.
 908      */
 909     if (!(pConv->instance->CBFflags & CBF_SKIP_DISCONNECTS))
 910     {
 911         WDML_InvokeCallback(pConv->instance, XTYP_DISCONNECT, 0, (HCONV)pConv, 0, 0,
 912                             0, 0, (pConv->wStatus & ST_ISSELF) ? 1 : 0);
 913     }
 914     PostMessageW(pConv->hwndClient, WM_DDE_TERMINATE, (WPARAM)pConv->hwndServer, 0);
 915     WDML_RemoveConv(pConv, WDML_SERVER_SIDE);
 916
 917     return WDML_QS_HANDLED;
 918 }
 919
 920 /******************************************************************
 921  *              WDML_ServerHandle
 922  *
 923  *
 924  */
 925 WDML_QUEUE_STATE WDML_ServerHandle(WDML_CONV* pConv, WDML_XACT* pXAct)
 926 {
 927     WDML_QUEUE_STATE    qs = WDML_QS_ERROR;
 928
 929     switch (pXAct->ddeMsg)
 930     {
 931     case WM_DDE_INITIATE:
 932         FIXME("WM_DDE_INITIATE shouldn't be there!\n");
 933         break;
 934     case WM_DDE_REQUEST:
 935         qs = WDML_ServerHandleRequest(pConv, pXAct);
 936         break;
 937
 938     case WM_DDE_ADVISE:
 939         qs = WDML_ServerHandleAdvise(pConv, pXAct);
 940         break;
 941
 942     case WM_DDE_UNADVISE:
 943         qs = WDML_ServerHandleUnadvise(pConv, pXAct);
 944         break;
 945
 946     case WM_DDE_EXECUTE:
 947         qs = WDML_ServerHandleExecute(pConv, pXAct);
 948         break;
 949
 950     case WM_DDE_POKE:
 951         qs = WDML_ServerHandlePoke(pConv, pXAct);
 952         break;
 953
 954     case WM_DDE_TERMINATE:
 955         qs = WDML_ServerHandleTerminate(pConv, pXAct);
 956         break;
 957
 958     case WM_DDE_ACK:
 959         WARN("Shouldn't receive a ACK message (never requests them). Ignoring it\n");
 960         break;
 961
 962     default:
 963         FIXME("Unsupported message %d\n", pXAct->ddeMsg);
 964     }
 965     return qs;
 966 }
 967
 968 /******************************************************************
 969  *              WDML_ServerConvProc
 970  *
 971  *
 972  */
 973 static LRESULT CALLBACK WDML_ServerConvProc(HWND hwndServer, UINT iMsg, WPARAM wParam, LPARAM lParam)
 974 {
 975     WDML_INSTANCE*      pInstance;
 976     WDML_CONV*          pConv;
 977     WDML_XACT*          pXAct = NULL;
 978
 979     TRACE("%p %04x %08lx %08lx\n", hwndServer, iMsg, wParam, lParam);
 980
 981     if (iMsg == WM_DESTROY)
 982     {
 983         pConv = WDML_GetConvFromWnd(hwndServer);
 984         if (pConv && !(pConv->wStatus & ST_TERMINATED))
 985         {
 986             WDML_ServerHandleTerminate(pConv, NULL);
 987         }
 988     }
 989     if (iMsg < WM_DDE_FIRST || iMsg > WM_DDE_LAST)
 990     {
 991         return IsWindowUnicode(hwndServer) ? DefWindowProcW(hwndServer, iMsg, wParam, lParam) :
 992                                              DefWindowProcA(hwndServer, iMsg, wParam, lParam);
 993     }
 994
 995     pInstance = WDML_GetInstanceFromWnd(hwndServer);
 996     pConv = WDML_GetConvFromWnd(hwndServer);
 997
 998     if (!pConv)
 999     {
1000         ERR("Got a message (%x) on a not known conversation, dropping request\n", iMsg);
1001         return 0;
1002     }
1003     if (pConv->hwndClient != WIN_GetFullHandle( (HWND)wParam ) || pConv->hwndServer != hwndServer)
1004     {
1005         ERR("mismatch between C/S windows and conversation\n");
1006         return 0;
1007     }
1008     if (pConv->instance != pInstance || pConv->instance == NULL)
1009     {
1010         ERR("mismatch in instances\n");
1011         return 0;
1012     }
1013
1014     switch (iMsg)
1015     {
1016     case WM_DDE_INITIATE:
1017         FIXME("WM_DDE_INITIATE message received!\n");
1018         break;
1019
1020     case WM_DDE_REQUEST:
1021         pXAct = WDML_ServerQueueRequest(pConv, lParam);
1022         break;
1023
1024     case WM_DDE_ADVISE:
1025         pXAct = WDML_ServerQueueAdvise(pConv, lParam);
1026         break;
1027
1028     case WM_DDE_UNADVISE:
1029         pXAct = WDML_ServerQueueUnadvise(pConv, lParam);
1030         break;
1031
1032     case WM_DDE_EXECUTE:
1033         pXAct = WDML_ServerQueueExecute(pConv, lParam);
1034         break;
1035
1036     case WM_DDE_POKE:
1037         pXAct = WDML_ServerQueuePoke(pConv, lParam);
1038         break;
1039
1040     case WM_DDE_TERMINATE:
1041         pXAct = WDML_ServerQueueTerminate(pConv, lParam);
1042         break;
1043
1044     case WM_DDE_ACK:
1045         WARN("Shouldn't receive a ACK message (never requests them). Ignoring it\n");
1046         break;
1047
1048     default:
1049         FIXME("Unsupported message %x\n", iMsg);
1050         break;
1051     }
1052
1053     if (pXAct)
1054     {
1055         pXAct->lParam = lParam;
1056
1057         if ((pConv->wStatus & ST_BLOCKED) || WDML_ServerHandle(pConv, pXAct) == WDML_QS_BLOCK)
1058         {
1059             TRACE("Transactions are blocked, add to the queue and exit\n");
1060             WDML_QueueTransaction(pConv, pXAct);
1061         }
1062         else
1063         {
1064             WDML_FreeTransaction(pInstance, pXAct, TRUE);
1065         }
1066     }
1067     else
1068         pConv->instance->lastError = DMLERR_MEMORY_ERROR;
1069
1070     return 0;
1071 }