dlls/ole32/marshal.c

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