dlls/ole32/marshal.c

   1 /*
   2  *      Marshalling library
   3  *
   4  *  Copyright 2002  Marcus Meissner
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <stdarg.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "winuser.h"
  32 #include "objbase.h"
  33 #include "ole2.h"
  34 #include "ole2ver.h"
  35 #include "rpc.h"
  36 #include "winerror.h"
  37 #include "winreg.h"
  38 #include "wownt32.h"
  39 #include "wtypes.h"
  40 #include "wine/unicode.h"
  41 #include "wine/winbase16.h"
  42 #include "compobj_private.h"
  43 #include "ifs.h"
  44
  45 #include "wine/debug.h"
  46
  47 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  48
  49 extern const CLSID CLSID_DfMarshal;
  50
  51 /* Marshalling just passes a unique identifier to the remote client,
  52  * that makes it possible to find the passed interface again.
  53  *
  54  * So basically we need a set of values that make it unique.
  55  *
  56  *      Process Identifier, Object IUnknown ptr, IID
  57  *
  58  * Note that the IUnknown_QI(ob,xiid,&ppv) always returns the SAME ppv value!
  59  */
  60
  61 typedef struct _mid2unknown {
  62     wine_marshal_id     mid;
  63     LPUNKNOWN           pUnk;
  64 } mid2unknown;
  65
  66 typedef struct _mid2stub {
  67     wine_marshal_id     mid;
  68     IRpcStubBuffer      *stub;
  69     LPUNKNOWN           pUnkServer;
  70 } mid2stub;
  71
  72 static mid2stub *stubs = NULL;
  73 static int nrofstubs = 0;
  74
  75 static mid2unknown *proxies = NULL;
  76 static int nrofproxies = 0;
  77
  78 HRESULT
  79 MARSHAL_Find_Stub_Server(wine_marshal_id *mid,LPUNKNOWN *punk) {
  80     int i;
  81
  82     for (i=0;i<nrofstubs;i++) {
  83         if (MARSHAL_Compare_Mids_NoInterface(mid,&(stubs[i].mid))) {
  84             *punk = stubs[i].pUnkServer;
  85             IUnknown_AddRef((*punk));
  86             return S_OK;
  87         }
  88     }
  89     return E_FAIL;
  90 }
  91
  92 HRESULT
  93 MARSHAL_Find_Stub_Buffer(wine_marshal_id *mid,IRpcStubBuffer **stub) {
  94     int i;
  95
  96     for (i=0;i<nrofstubs;i++) {
  97         if (MARSHAL_Compare_Mids(mid,&(stubs[i].mid))) {
  98             *stub = stubs[i].stub;
  99             IUnknown_AddRef((*stub));
 100             return S_OK;
 101         }
 102     }
 103     return E_FAIL;
 104 }
 105
 106 HRESULT
 107 MARSHAL_Find_Stub(wine_marshal_id *mid,LPUNKNOWN *pUnk) {
 108     int i;
 109
 110     for (i=0;i<nrofstubs;i++) {
 111         if (MARSHAL_Compare_Mids(mid,&(stubs[i].mid))) {
 112             *pUnk = stubs[i].pUnkServer;
 113             IUnknown_AddRef((*pUnk));
 114             return S_OK;
 115         }
 116     }
 117     return E_FAIL;
 118 }
 119
 120 HRESULT
 121 MARSHAL_Register_Stub(wine_marshal_id *mid,LPUNKNOWN pUnk,IRpcStubBuffer *stub) {
 122     LPUNKNOWN   xPunk;
 123     if (!MARSHAL_Find_Stub(mid,&xPunk)) {
 124         FIXME("Already have entry for (%lx/%s)!\n",mid->objectid,debugstr_guid(&(mid->iid)));
 125         return S_OK;
 126     }
 127     if (nrofstubs)
 128         stubs=HeapReAlloc(GetProcessHeap(),0,stubs,sizeof(stubs[0])*(nrofstubs+1));
 129     else
 130         stubs=HeapAlloc(GetProcessHeap(),0,sizeof(stubs[0]));
 131     if (!stubs) return E_OUTOFMEMORY;
 132     stubs[nrofstubs].stub = stub;
 133     stubs[nrofstubs].pUnkServer = pUnk;
 134     memcpy(&(stubs[nrofstubs].mid),mid,sizeof(*mid));
 135     nrofstubs++;
 136     return S_OK;
 137 }
 138
 139 HRESULT
 140 MARSHAL_Find_Proxy(wine_marshal_id *mid,LPUNKNOWN *punk) {
 141     int i;
 142
 143     for (i=0;i<nrofproxies;i++)
 144         if (MARSHAL_Compare_Mids(mid,&(proxies[i].mid))) {
 145             *punk = proxies[i].pUnk;
 146             IUnknown_AddRef((*punk));
 147             return S_OK;
 148         }
 149     return E_FAIL;
 150 }
 151
 152 HRESULT
 153 MARSHAL_Find_Proxy_Object(wine_marshal_id *mid,LPUNKNOWN *punk) {
 154     int i;
 155
 156     for (i=0;i<nrofproxies;i++)
 157         if (MARSHAL_Compare_Mids_NoInterface(mid,&(proxies[i].mid))) {
 158             *punk = proxies[i].pUnk;
 159             IUnknown_AddRef((*punk));
 160             return S_OK;
 161         }
 162     return E_FAIL;
 163 }
 164
 165 HRESULT
 166 MARSHAL_Register_Proxy(wine_marshal_id *mid,LPUNKNOWN punk) {
 167     int i;
 168
 169     for (i=0;i<nrofproxies;i++) {
 170         if (MARSHAL_Compare_Mids(mid,&(proxies[i].mid))) {
 171             ERR("Already have mid?\n");
 172             return E_FAIL;
 173         }
 174     }
 175     if (nrofproxies)
 176         proxies = HeapReAlloc(GetProcessHeap(),0,proxies,sizeof(proxies[0])*(nrofproxies+1));
 177     else
 178         proxies = HeapAlloc(GetProcessHeap(),0,sizeof(proxies[0]));
 179     memcpy(&(proxies[nrofproxies].mid),mid,sizeof(*mid));
 180     proxies[nrofproxies].pUnk = punk;
 181     nrofproxies++;
 182     IUnknown_AddRef(punk);
 183     return S_OK;
 184 }
 185
 186 /********************** StdMarshal implementation ****************************/
 187 typedef struct _StdMarshalImpl {
 188   ICOM_VTABLE(IMarshal) *lpvtbl;
 189   DWORD                 ref;
 190
 191   IID                   iid;
 192   DWORD                 dwDestContext;
 193   LPVOID                pvDestContext;
 194   DWORD                 mshlflags;
 195 } StdMarshalImpl;
 196
 197 HRESULT WINAPI
 198 StdMarshalImpl_QueryInterface(LPMARSHAL iface,REFIID riid,LPVOID *ppv) {
 199   *ppv = NULL;
 200   if (IsEqualIID(&IID_IUnknown,riid) || IsEqualIID(&IID_IMarshal,riid)) {
 201     *ppv = iface;
 202     IUnknown_AddRef(iface);
 203     return S_OK;
 204   }
 205   FIXME("No interface for %s.\n",debugstr_guid(riid));
 206   return E_NOINTERFACE;
 207 }
 208
 209 ULONG WINAPI
 210 StdMarshalImpl_AddRef(LPMARSHAL iface) {
 211   ICOM_THIS(StdMarshalImpl,iface);
 212   This->ref++;
 213   return This->ref;
 214 }
 215
 216 ULONG WINAPI
 217 StdMarshalImpl_Release(LPMARSHAL iface) {
 218   ICOM_THIS(StdMarshalImpl,iface);
 219   This->ref--;
 220
 221   if (This->ref)
 222     return This->ref;
 223   HeapFree(GetProcessHeap(),0,This);
 224   return 0;
 225 }
 226
 227 HRESULT WINAPI
 228 StdMarshalImpl_GetUnmarshalClass(
 229   LPMARSHAL iface, REFIID riid, void* pv, DWORD dwDestContext,
 230   void* pvDestContext, DWORD mshlflags, CLSID* pCid
 231 ) {
 232   memcpy(pCid,&CLSID_DfMarshal,sizeof(CLSID_DfMarshal));
 233   return S_OK;
 234 }
 235
 236 HRESULT WINAPI
 237 StdMarshalImpl_GetMarshalSizeMax(
 238   LPMARSHAL iface, REFIID riid, void* pv, DWORD dwDestContext,
 239   void* pvDestContext, DWORD mshlflags, DWORD* pSize
 240 ) {
 241   *pSize = sizeof(wine_marshal_id)+sizeof(wine_marshal_data);
 242   return S_OK;
 243 }
 244
 245 HRESULT WINAPI
 246 StdMarshalImpl_MarshalInterface(
 247   LPMARSHAL iface, IStream *pStm,REFIID riid, void* pv, DWORD dwDestContext,
 248   void* pvDestContext, DWORD mshlflags
 249 ) {
 250   wine_marshal_id       mid;
 251   wine_marshal_data     md;
 252   IUnknown              *pUnk;
 253   ULONG                 res;
 254   HRESULT               hres;
 255   IRpcStubBuffer        *stub;
 256   IPSFactoryBuffer      *psfacbuf;
 257
 258   TRACE("(...,%s,...)\n",debugstr_guid(riid));
 259   IUnknown_QueryInterface((LPUNKNOWN)pv,&IID_IUnknown,(LPVOID*)&pUnk);
 260   mid.processid = GetCurrentProcessId();
 261   mid.objectid = (DWORD)pUnk; /* FIXME */
 262   IUnknown_Release(pUnk);
 263   memcpy(&mid.iid,riid,sizeof(mid.iid));
 264   md.dwDestContext      = dwDestContext;
 265   md.mshlflags          = mshlflags;
 266   hres = IStream_Write(pStm,&mid,sizeof(mid),&res);
 267   if (hres) return hres;
 268   hres = IStream_Write(pStm,&md,sizeof(md),&res);
 269   if (hres) return hres;
 270
 271   if (SUCCEEDED(MARSHAL_Find_Stub(&mid,&pUnk))) {
 272       IUnknown_Release(pUnk);
 273       return S_OK;
 274   }
 275   hres = get_facbuf_for_iid(riid,&psfacbuf);
 276   if (hres) return hres;
 277   hres = IPSFactoryBuffer_CreateStub(psfacbuf,riid,pv,&stub);
 278   IPSFactoryBuffer_Release(psfacbuf);
 279   if (hres) {
 280     FIXME("Failed to create a stub for %s\n",debugstr_guid(riid));
 281     return hres;
 282   }
 283   IUnknown_QueryInterface((LPUNKNOWN)pv,riid,(LPVOID*)&pUnk);
 284   MARSHAL_Register_Stub(&mid,pUnk,stub);
 285   IUnknown_Release(pUnk);
 286   return S_OK;
 287 }
 288
 289 HRESULT WINAPI
 290 StdMarshalImpl_UnmarshalInterface(
 291   LPMARSHAL iface, IStream *pStm, REFIID riid, void **ppv
 292 ) {
 293   wine_marshal_id       mid;
 294   wine_marshal_data     md;
 295   ULONG                 res;
 296   HRESULT               hres;
 297   IPSFactoryBuffer      *psfacbuf;
 298   IRpcProxyBuffer       *rpcproxy;
 299   IRpcChannelBuffer     *chanbuf;
 300
 301   TRACE("(...,%s,....)\n",debugstr_guid(riid));
 302   hres = IStream_Read(pStm,&mid,sizeof(mid),&res);
 303   if (hres) return hres;
 304   hres = IStream_Read(pStm,&md,sizeof(md),&res);
 305   if (hres) return hres;
 306   if (SUCCEEDED(MARSHAL_Find_Stub(&mid,(LPUNKNOWN*)ppv))) {
 307       FIXME("Calling back to ourselves for %s!\n",debugstr_guid(riid));
 308       return S_OK;
 309   }
 310   hres = get_facbuf_for_iid(riid,&psfacbuf);
 311   if (hres) return hres;
 312   hres = IPSFactoryBuffer_CreateProxy(psfacbuf,NULL,riid,&rpcproxy,ppv);
 313   if (hres) {
 314     FIXME("Failed to create a proxy for %s\n",debugstr_guid(riid));
 315     return hres;
 316   }
 317   hres = PIPE_GetNewPipeBuf(&mid,&chanbuf);
 318   if (hres) {
 319     ERR("Failed to get an rpc channel buffer for %s\n",debugstr_guid(riid));
 320   } else {
 321     IRpcProxyBuffer_Connect(rpcproxy,chanbuf);
 322     IRpcProxyBuffer_Release(rpcproxy); /* no need */
 323   }
 324   IPSFactoryBuffer_Release(psfacbuf);
 325   return hres;
 326 }
 327
 328 HRESULT WINAPI
 329 StdMarshalImpl_ReleaseMarshalData(LPMARSHAL iface, IStream *pStm) {
 330   FIXME("(), stub!\n");
 331   return S_OK;
 332 }
 333
 334 HRESULT WINAPI
 335 StdMarshalImpl_DisconnectObject(LPMARSHAL iface, DWORD dwReserved) {
 336   FIXME("(), stub!\n");
 337   return S_OK;
 338 }
 339
 340 ICOM_VTABLE(IMarshal) stdmvtbl = {
 341     ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 342     StdMarshalImpl_QueryInterface,
 343     StdMarshalImpl_AddRef,
 344     StdMarshalImpl_Release,
 345     StdMarshalImpl_GetUnmarshalClass,
 346     StdMarshalImpl_GetMarshalSizeMax,
 347     StdMarshalImpl_MarshalInterface,
 348     StdMarshalImpl_UnmarshalInterface,
 349     StdMarshalImpl_ReleaseMarshalData,
 350     StdMarshalImpl_DisconnectObject
 351 };
 352
 353 /***********************************************************************
 354  *              CoGetStandardMarshal    [OLE32.@]
 355  *
 356  * When the COM library in the client process receives a marshalled
 357  * interface pointer, it looks for a CLSID to be used in creating a proxy
 358  * for the purposes of unmarshalling the packet. If the packet does not
 359  * contain a CLSID for the proxy, COM calls CoGetStandardMarshal, passing a
 360  * NULL pUnk value.
 361  * This function creates a standard proxy in the client process and returns
 362  * a pointer to that proxy's implementation of IMarshal.
 363  * COM uses this pointer to call CoUnmarshalInterface to retrieve the pointer
 364  * to the requested interface.
 365  */
 366 HRESULT WINAPI
 367 CoGetStandardMarshal(
 368   REFIID riid,IUnknown *pUnk,DWORD dwDestContext,LPVOID pvDestContext,
 369   DWORD mshlflags, LPMARSHAL *pMarshal
 370 ) {
 371   StdMarshalImpl *dm;
 372
 373   if (pUnk == NULL) {
 374     FIXME("(%s,NULL,%lx,%p,%lx,%p), unimplemented yet.\n",
 375       debugstr_guid(riid),dwDestContext,pvDestContext,mshlflags,pMarshal
 376     );
 377     return E_FAIL;
 378   }
 379   TRACE("(%s,%p,%lx,%p,%lx,%p)\n",
 380     debugstr_guid(riid),pUnk,dwDestContext,pvDestContext,mshlflags,pMarshal
 381   );
 382   dm = (StdMarshalImpl*) *pMarshal = HeapAlloc(GetProcessHeap(),0,sizeof(StdMarshalImpl));
 383   if (!dm) return E_FAIL;
 384   dm->lpvtbl            = &stdmvtbl;
 385   dm->ref               = 1;
 386
 387   memcpy(&dm->iid,riid,sizeof(dm->iid));
 388   dm->dwDestContext     = dwDestContext;
 389   dm->pvDestContext     = pvDestContext;
 390   dm->mshlflags         = mshlflags;
 391   return S_OK;
 392 }
 393
 394 /* Helper function for getting Marshaler */
 395 static HRESULT WINAPI
 396 _GetMarshaller(REFIID riid, IUnknown *pUnk,DWORD dwDestContext,
 397   void *pvDestContext, DWORD mshlFlags, LPMARSHAL *pMarshal
 398 ) {
 399   HRESULT hres;
 400
 401   if (!pUnk)
 402       return E_POINTER;
 403   hres = IUnknown_QueryInterface(pUnk,&IID_IMarshal,(LPVOID*)pMarshal);
 404   if (hres)
 405     hres = CoGetStandardMarshal(riid,pUnk,dwDestContext,pvDestContext,mshlFlags,pMarshal);
 406   return hres;
 407 }
 408
 409 /***********************************************************************
 410  *              CoGetMarshalSizeMax     [OLE32.@]
 411  */
 412 HRESULT WINAPI
 413 CoGetMarshalSizeMax(ULONG *pulSize, REFIID riid, IUnknown *pUnk,
 414   DWORD dwDestContext, void *pvDestContext, DWORD mshlFlags
 415 ) {
 416   HRESULT       hres;
 417   LPMARSHAL     pMarshal;
 418
 419   hres = _GetMarshaller(riid,pUnk,dwDestContext,pvDestContext,mshlFlags,&pMarshal);
 420   if (hres)
 421     return hres;
 422   hres = IMarshal_GetMarshalSizeMax(pMarshal,riid,pUnk,dwDestContext,pvDestContext,mshlFlags,pulSize);
 423   *pulSize += sizeof(wine_marshal_id)+sizeof(wine_marshal_data)+sizeof(CLSID);
 424   IMarshal_Release(pMarshal);
 425   return hres;
 426 }
 427
 428
 429 /***********************************************************************
 430  *              CoMarshalInterface      [OLE32.@]
 431  */
 432 HRESULT WINAPI
 433 CoMarshalInterface( IStream *pStm, REFIID riid, IUnknown *pUnk,
 434   DWORD dwDestContext, void *pvDestContext, DWORD mshlflags
 435 ) {
 436   HRESULT               hres;
 437   LPMARSHAL             pMarshal;
 438   CLSID                 xclsid;
 439   ULONG                 writeres;
 440   wine_marshal_id       mid;
 441   wine_marshal_data     md;
 442   ULONG                 res;
 443   IUnknown              *pUnknown;
 444
 445   TRACE("(%p, %s, %p, %lx, %p, %lx)\n",
 446     pStm,debugstr_guid(riid),pUnk,dwDestContext,pvDestContext,mshlflags
 447   );
 448   STUBMGR_Start(); /* Just to be sure we have one running. */
 449   mid.processid = GetCurrentProcessId();
 450   IUnknown_QueryInterface(pUnk,&IID_IUnknown,(LPVOID*)&pUnknown);
 451   mid.objectid = (DWORD)pUnknown;
 452   IUnknown_Release(pUnknown);
 453   memcpy(&mid.iid,riid,sizeof(mid.iid));
 454   md.dwDestContext      = dwDestContext;
 455   md.mshlflags          = mshlflags;
 456   hres = IStream_Write(pStm,&mid,sizeof(mid),&res);
 457   if (hres) return hres;
 458   hres = IStream_Write(pStm,&md,sizeof(md),&res);
 459   if (hres) return hres;
 460   hres = _GetMarshaller(riid,pUnk,dwDestContext,pvDestContext,mshlflags,&pMarshal);
 461   if (hres) {
 462     FIXME("Failed to get marshaller, %lx?\n",hres);
 463     return hres;
 464   }
 465   hres = IMarshal_GetUnmarshalClass(pMarshal,riid,pUnk,dwDestContext,pvDestContext,mshlflags,&xclsid);
 466   if (hres) {
 467     FIXME("IMarshal:GetUnmarshalClass failed, %lx\n",hres);
 468     goto release_marshal;
 469   }
 470   hres = IStream_Write(pStm,&xclsid,sizeof(xclsid),&writeres);
 471   if (hres) {
 472     FIXME("Stream write failed, %lx\n",hres);
 473     goto release_marshal;
 474   }
 475   hres = IMarshal_MarshalInterface(pMarshal,pStm,riid,pUnk,dwDestContext,pvDestContext,mshlflags);
 476   if (hres) {
 477     if (IsEqualGUID(riid,&IID_IClassFactory)) {
 478         MESSAGE("\nERROR: You need to merge the 'winedefault.reg' file into your\n");
 479         MESSAGE("       Wine registry by running: `regedit winedefault.reg'\n\n");
 480     } else {
 481         if (IsEqualGUID(riid,&IID_IOleObject)) {
 482             ERR("WINE currently cannot marshal IOleObject interfaces. This means you cannot embed/link OLE objects between applications.\n");
 483         } else {
 484             FIXME("Failed to marshal the interface %s, %lx?\n",debugstr_guid(riid),hres);
 485         }
 486     }
 487     goto release_marshal;
 488   }
 489 release_marshal:
 490   IMarshal_Release(pMarshal);
 491   return hres;
 492 }
 493
 494
 495 /***********************************************************************
 496  *              CoUnmarshalInterface    [OLE32.@]
 497  */
 498 HRESULT WINAPI
 499 CoUnmarshalInterface(IStream *pStm, REFIID riid, LPVOID *ppv) {
 500   HRESULT               hres;
 501   wine_marshal_id       mid;
 502   wine_marshal_data     md;
 503   ULONG                 res;
 504   LPMARSHAL             pMarshal;
 505   LPUNKNOWN             pUnk;
 506   CLSID                 xclsid;
 507
 508   TRACE("(%p,%s,%p)\n",pStm,debugstr_guid(riid),ppv);
 509
 510   hres = IStream_Read(pStm,&mid,sizeof(mid),&res);
 511   if (hres) {
 512       FIXME("Stream read 1 failed, %lx, (%ld of %d)\n",hres,res,sizeof(mid));
 513       return hres;
 514   }
 515   hres = IStream_Read(pStm,&md,sizeof(md),&res);
 516   if (hres) {
 517       FIXME("Stream read 2 failed, %lx, (%ld of %d)\n",hres,res,sizeof(md));
 518       return hres;
 519   }
 520   hres = IStream_Read(pStm,&xclsid,sizeof(xclsid),&res);
 521   if (hres) {
 522       FIXME("Stream read 3 failed, %lx, (%ld of %d)\n",hres,res,sizeof(xclsid));
 523       return hres;
 524   }
 525   hres=CoCreateInstance(&xclsid,NULL,CLSCTX_INPROC_SERVER | CLSCTX_INPROC_HANDLER | CLSCTX_LOCAL_SERVER,&IID_IMarshal,(void**)&pUnk);
 526   if (hres) {
 527       FIXME("Failed to create instance of unmarshaller %s.\n",debugstr_guid(&xclsid));
 528       return hres;
 529   }
 530   hres = _GetMarshaller(riid,pUnk,md.dwDestContext,NULL,md.mshlflags,&pMarshal);
 531   if (hres) {
 532       FIXME("Failed to get unmarshaller, %lx?\n",hres);
 533       return hres;
 534   }
 535   hres = IMarshal_UnmarshalInterface(pMarshal,pStm,riid,ppv);
 536   if (hres) {
 537     FIXME("Failed to Unmarshal the interface, %lx?\n",hres);
 538     goto release_marshal;
 539   }
 540 release_marshal:
 541   IMarshal_Release(pMarshal);
 542   return hres;
 543 }
 544
 545 /***********************************************************************
 546  *              CoMarshalInterThreadInterfaceInStream   [OLE32.@]
 547  *
 548  * Marshal interfaces across threads. We don't have a thread distinction,
 549  * meaning most interfaces just work across different threads, the RPC
 550  * handles it.
 551  */
 552 HRESULT WINAPI
 553 CoMarshalInterThreadInterfaceInStream(
 554   REFIID riid, LPUNKNOWN pUnk, LPSTREAM * ppStm
 555 ) {
 556   ULONG res;
 557   ULARGE_INTEGER        xpos;
 558   LARGE_INTEGER         seekto;
 559   HRESULT               hres;
 560
 561   TRACE("(%s, %p, %p)\n",debugstr_guid(riid), pUnk, ppStm);
 562   hres = CreateStreamOnHGlobal(0, TRUE, ppStm);
 563   if (hres) return hres;
 564   /* CoMarshalInterface(...); */
 565   hres = IStream_Write(*ppStm,&pUnk,sizeof(LPUNKNOWN),&res);
 566   if (hres) return hres;
 567   memset(&seekto,0,sizeof(seekto));
 568   IStream_Seek(*ppStm,seekto,SEEK_SET,&xpos);
 569   return S_OK;
 570 }
 571
 572 /***********************************************************************
 573  *              CoGetInterfaceAndReleaseStream  [OLE32.@]
 574  */
 575 HRESULT WINAPI
 576 CoGetInterfaceAndReleaseStream(LPSTREAM pStm,REFIID riid, LPVOID *ppv) {
 577   ULONG res;
 578   HRESULT               hres;
 579   LPUNKNOWN             pUnk;
 580
 581   TRACE("(,%s,)\n",debugstr_guid(riid));
 582   /* CoUnmarshalInterface(...); */
 583   hres = IStream_Read(pStm,&pUnk,sizeof(LPUNKNOWN),&res);
 584   if (hres) return hres;
 585   IStream_Release(pStm);
 586   return IUnknown_QueryInterface(pUnk,riid,ppv);
 587 }
 588
 589 static HRESULT WINAPI
 590 SMCF_QueryInterface(LPCLASSFACTORY iface,REFIID riid, LPVOID *ppv) {
 591   *ppv = NULL;
 592   if (IsEqualIID(riid,&IID_IUnknown) || IsEqualIID(riid,&IID_IClassFactory)) {
 593     *ppv = (LPVOID)iface;
 594     return S_OK;
 595   }
 596   return E_NOINTERFACE;
 597 }
 598 static ULONG WINAPI SMCF_AddRef(LPCLASSFACTORY iface) { return 2; }
 599 static ULONG WINAPI SMCF_Release(LPCLASSFACTORY iface) { return 1; }
 600
 601 static HRESULT WINAPI
 602 SMCF_CreateInstance(
 603   LPCLASSFACTORY iface, LPUNKNOWN pUnk, REFIID riid, LPVOID *ppv
 604 ) {
 605   if (IsEqualIID(riid,&IID_IMarshal)) {
 606       StdMarshalImpl    *dm;
 607       dm=(StdMarshalImpl*)HeapAlloc(GetProcessHeap(),0,sizeof(StdMarshalImpl));
 608       if (!dm)
 609           return E_FAIL;
 610       dm->lpvtbl        = &stdmvtbl;
 611       dm->ref           = 1;
 612       *ppv = (LPVOID)dm;
 613       return S_OK;
 614   }
 615   FIXME("(%s), not supported.\n",debugstr_guid(riid));
 616   return E_NOINTERFACE;
 617 }
 618
 619 static HRESULT WINAPI
 620 SMCF_LockServer(LPCLASSFACTORY iface, BOOL fLock) {
 621     FIXME("(%d), stub!\n",fLock);
 622     return S_OK;
 623 }
 624
 625 static ICOM_VTABLE(IClassFactory) dfmarshalcfvtbl = {
 626     ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 627     SMCF_QueryInterface,
 628     SMCF_AddRef,
 629     SMCF_Release,
 630     SMCF_CreateInstance,
 631     SMCF_LockServer
 632 };
 633 static ICOM_VTABLE(IClassFactory) *pdfmarshalcfvtbl = &dfmarshalcfvtbl;
 634
 635 HRESULT
 636 MARSHAL_GetStandardMarshalCF(LPVOID *ppv) {
 637   *ppv = &pdfmarshalcfvtbl;
 638   return S_OK;
 639 }