dlls/rpcrt4/cstub.c

   1 /*
   2  * COM stub (CStdStubBuffer) implementation
   3  *
   4  * Copyright 2001 Ove Kåven, TransGaming Technologies
   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdarg.h>
  25
  26 #define COBJMACROS
  27
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "winerror.h"
  31 #include "excpt.h"
  32
  33 #include "objbase.h"
  34 #include "rpcproxy.h"
  35
  36 #include "wine/debug.h"
  37 #include "wine/exception.h"
  38
  39 #include "cpsf.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  42
  43 #define STUB_HEADER(This) (((const CInterfaceStubHeader*)((This)->lpVtbl))[-1])
  44
  45 static LONG WINAPI stub_filter(EXCEPTION_POINTERS *eptr)
  46 {
  47     if (eptr->ExceptionRecord->ExceptionFlags & EXCEPTION_NONCONTINUABLE)
  48         return EXCEPTION_CONTINUE_SEARCH;
  49     return EXCEPTION_EXECUTE_HANDLER;
  50 }
  51
  52 typedef struct
  53 {
  54     IUnknownVtbl *base_obj;
  55     IRpcStubBuffer *base_stub;
  56     CStdStubBuffer stub_buffer;
  57 } cstdstubbuffer_delegating_t;
  58
  59 static inline cstdstubbuffer_delegating_t *impl_from_delegating( IRpcStubBuffer *iface )
  60 {
  61     return (cstdstubbuffer_delegating_t*)((char *)iface - FIELD_OFFSET(cstdstubbuffer_delegating_t, stub_buffer));
  62 }
  63
  64 HRESULT WINAPI CStdStubBuffer_Construct(REFIID riid,
  65                                        LPUNKNOWN pUnkServer,
  66                                        PCInterfaceName name,
  67                                        CInterfaceStubVtbl *vtbl,
  68                                        LPPSFACTORYBUFFER pPSFactory,
  69                                        LPRPCSTUBBUFFER *ppStub)
  70 {
  71   CStdStubBuffer *This;
  72   IUnknown *pvServer;
  73   HRESULT r;
  74   TRACE("(%p,%p,%p,%p) %s\n", pUnkServer, vtbl, pPSFactory, ppStub, name);
  75   TRACE("iid=%s\n", debugstr_guid(vtbl->header.piid));
  76   TRACE("vtbl=%p\n", &vtbl->Vtbl);
  77
  78   if (!IsEqualGUID(vtbl->header.piid, riid)) {
  79     ERR("IID mismatch during stub creation\n");
  80     return RPC_E_UNEXPECTED;
  81   }
  82
  83   r = IUnknown_QueryInterface(pUnkServer, riid, (void**)&pvServer);
  84   if(FAILED(r))
  85     return r;
  86
  87   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(CStdStubBuffer));
  88   if (!This) {
  89     IUnknown_Release(pvServer);
  90     return E_OUTOFMEMORY;
  91   }
  92
  93   This->lpVtbl = &vtbl->Vtbl;
  94   This->RefCount = 1;
  95   This->pvServerObject = pvServer;
  96   This->pPSFactory = pPSFactory;
  97   *ppStub = (LPRPCSTUBBUFFER)This;
  98
  99   IPSFactoryBuffer_AddRef(pPSFactory);
 100   return S_OK;
 101 }
 102
 103 static CRITICAL_SECTION delegating_vtbl_section;
 104 static CRITICAL_SECTION_DEBUG critsect_debug =
 105 {
 106     0, 0, &delegating_vtbl_section,
 107     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
 108       0, 0, { (DWORD_PTR)(__FILE__ ": delegating_vtbl_section") }
 109 };
 110 static CRITICAL_SECTION delegating_vtbl_section = { &critsect_debug, -1, 0, 0, 0, 0 };
 111
 112 typedef struct
 113 {
 114     DWORD ref;
 115     DWORD size;
 116     void **methods;
 117     IUnknownVtbl vtbl;
 118     /* remaining entries in vtbl */
 119 } ref_counted_vtbl;
 120
 121 static struct
 122 {
 123     ref_counted_vtbl *table;
 124 } current_vtbl;
 125
 126
 127 static HRESULT WINAPI delegating_QueryInterface(IUnknown *pUnk, REFIID iid, void **ppv)
 128 {
 129     *ppv = (void *)pUnk;
 130     return S_OK;
 131 }
 132
 133 static ULONG WINAPI delegating_AddRef(IUnknown *pUnk)
 134 {
 135     return 1;
 136 }
 137
 138 static ULONG WINAPI delegating_Release(IUnknown *pUnk)
 139 {
 140     return 1;
 141 }
 142
 143 #if defined(__i386__)
 144
 145 /* The idea here is to replace the first param on the stack
 146    ie. This (which will point to cstdstubbuffer_delegating_t)
 147    with This->stub_buffer.pvServerObject and then jump to the
 148    relevant offset in This->stub_buffer.pvServerObject's vtbl.
 149 */
 150 #include "pshpack1.h"
 151 typedef struct {
 152     DWORD mov1;    /* mov 0x4(%esp), %eax      8b 44 24 04 */
 153     WORD mov2;     /* mov 0x10(%eax), %eax     8b 40 */
 154     BYTE sixteen;  /*                          10   */
 155     DWORD mov3;    /* mov %eax, 0x4(%esp)      89 44 24 04 */
 156     WORD mov4;     /* mov (%eax), %eax         8b 00 */
 157     WORD mov5;     /* mov offset(%eax), %eax   8b 80 */
 158     DWORD offset;  /*                          xx xx xx xx */
 159     WORD jmp;      /* jmp *%eax                ff e0 */
 160     BYTE pad[3];   /* lea 0x0(%esi), %esi      8d 76 00 */
 161 } vtbl_method_t;
 162 #include "poppack.h"
 163
 164 static void fill_table(IUnknownVtbl *vtbl, void **methods, DWORD num)
 165 {
 166     vtbl_method_t *method;
 167     void **entry;
 168     DWORD i;
 169
 170     vtbl->QueryInterface = delegating_QueryInterface;
 171     vtbl->AddRef = delegating_AddRef;
 172     vtbl->Release = delegating_Release;
 173
 174     method = (vtbl_method_t*)methods;
 175     entry = (void**)(vtbl + 1);
 176
 177     for(i = 3; i < num; i++)
 178     {
 179         *entry = method;
 180         method->mov1 = 0x0424448b;
 181         method->mov2 = 0x408b;
 182         method->sixteen = 0x10;
 183         method->mov3 = 0x04244489;
 184         method->mov4 = 0x008b;
 185         method->mov5 = 0x808b;
 186         method->offset = i << 2;
 187         method->jmp = 0xe0ff;
 188         method->pad[0] = 0x8d;
 189         method->pad[1] = 0x76;
 190         method->pad[2] = 0x00;
 191
 192         method++;
 193         entry++;
 194     }
 195 }
 196
 197 #else  /* __i386__ */
 198
 199 typedef struct {int dummy;} vtbl_method_t;
 200 static void fill_table(IUnknownVtbl *vtbl, void **methods, DWORD num)
 201 {
 202     ERR("delegated stubs are not supported on this architecture\n");
 203 }
 204
 205 #endif  /* __i386__ */
 206
 207 void create_delegating_vtbl(DWORD num_methods)
 208 {
 209     TRACE("%d\n", num_methods);
 210     if(num_methods <= 3)
 211     {
 212         ERR("should have more than %d methods\n", num_methods);
 213         return;
 214     }
 215
 216     EnterCriticalSection(&delegating_vtbl_section);
 217     if(!current_vtbl.table || num_methods > current_vtbl.table->size)
 218     {
 219         DWORD size;
 220         DWORD old_protect;
 221         if(current_vtbl.table && current_vtbl.table->ref == 0)
 222         {
 223             TRACE("freeing old table\n");
 224             VirtualFree(current_vtbl.table->methods,
 225                         (current_vtbl.table->size - 3) * sizeof(vtbl_method_t),
 226                         MEM_RELEASE);
 227             HeapFree(GetProcessHeap(), 0, current_vtbl.table);
 228         }
 229         size = (num_methods - 3) * sizeof(vtbl_method_t);
 230         current_vtbl.table = HeapAlloc(GetProcessHeap(), 0, FIELD_OFFSET(ref_counted_vtbl, vtbl) + num_methods * sizeof(void*));
 231         current_vtbl.table->ref = 0;
 232         current_vtbl.table->size = num_methods;
 233         current_vtbl.table->methods = VirtualAlloc(NULL, size, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
 234         fill_table(&current_vtbl.table->vtbl, current_vtbl.table->methods, num_methods);
 235         VirtualProtect(current_vtbl.table->methods, size, PAGE_EXECUTE_READ, &old_protect);
 236     }
 237     LeaveCriticalSection(&delegating_vtbl_section);
 238 }
 239
 240 static IUnknownVtbl *get_delegating_vtbl(void)
 241 {
 242     IUnknownVtbl *ret;
 243
 244     EnterCriticalSection(&delegating_vtbl_section);
 245     current_vtbl.table->ref++;
 246     ret = &current_vtbl.table->vtbl;
 247     LeaveCriticalSection(&delegating_vtbl_section);
 248     return ret;
 249 }
 250
 251 static void release_delegating_vtbl(IUnknownVtbl *vtbl)
 252 {
 253     ref_counted_vtbl *table = (ref_counted_vtbl*)((DWORD *)vtbl - 1);
 254
 255     EnterCriticalSection(&delegating_vtbl_section);
 256     table->ref--;
 257     TRACE("ref now %d\n", table->ref);
 258     if(table->ref == 0 && table != current_vtbl.table)
 259     {
 260         TRACE("... and we're not current so free'ing\n");
 261         VirtualFree(current_vtbl.table->methods,
 262                     (current_vtbl.table->size - 3) * sizeof(vtbl_method_t),
 263                     MEM_RELEASE);
 264         HeapFree(GetProcessHeap(), 0, table);
 265     }
 266     LeaveCriticalSection(&delegating_vtbl_section);
 267 }
 268
 269 HRESULT WINAPI CStdStubBuffer_Delegating_Construct(REFIID riid,
 270                                                    LPUNKNOWN pUnkServer,
 271                                                    PCInterfaceName name,
 272                                                    CInterfaceStubVtbl *vtbl,
 273                                                    REFIID delegating_iid,
 274                                                    LPPSFACTORYBUFFER pPSFactory,
 275                                                    LPRPCSTUBBUFFER *ppStub)
 276 {
 277     cstdstubbuffer_delegating_t *This;
 278     IUnknown *pvServer;
 279     HRESULT r;
 280
 281     TRACE("(%p,%p,%p,%p) %s\n", pUnkServer, vtbl, pPSFactory, ppStub, name);
 282     TRACE("iid=%s delegating to %s\n", debugstr_guid(vtbl->header.piid), debugstr_guid(delegating_iid));
 283     TRACE("vtbl=%p\n", &vtbl->Vtbl);
 284
 285     if (!IsEqualGUID(vtbl->header.piid, riid))
 286     {
 287         ERR("IID mismatch during stub creation\n");
 288         return RPC_E_UNEXPECTED;
 289     }
 290
 291     r = IUnknown_QueryInterface(pUnkServer, riid, (void**)&pvServer);
 292     if(FAILED(r)) return r;
 293
 294     This = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*This));
 295     if (!This)
 296     {
 297         IUnknown_Release(pvServer);
 298         return E_OUTOFMEMORY;
 299     }
 300
 301     This->base_obj = get_delegating_vtbl();
 302     r = create_stub(delegating_iid, (IUnknown*)&This->base_obj, &This->base_stub);
 303     if(FAILED(r))
 304     {
 305         release_delegating_vtbl(This->base_obj);
 306         HeapFree(GetProcessHeap(), 0, This);
 307         IUnknown_Release(pvServer);
 308         return r;
 309     }
 310
 311     This->stub_buffer.lpVtbl = &vtbl->Vtbl;
 312     This->stub_buffer.RefCount = 1;
 313     This->stub_buffer.pvServerObject = pvServer;
 314     This->stub_buffer.pPSFactory = pPSFactory;
 315     *ppStub = (LPRPCSTUBBUFFER)&This->stub_buffer;
 316
 317     IPSFactoryBuffer_AddRef(pPSFactory);
 318     return S_OK;
 319 }
 320
 321 HRESULT WINAPI CStdStubBuffer_QueryInterface(LPRPCSTUBBUFFER iface,
 322                                             REFIID riid,
 323                                             LPVOID *obj)
 324 {
 325   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 326   TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
 327
 328   if (IsEqualIID(&IID_IUnknown, riid) ||
 329       IsEqualIID(&IID_IRpcStubBuffer, riid))
 330   {
 331     IUnknown_AddRef(iface);
 332     *obj = iface;
 333     return S_OK;
 334   }
 335   *obj = NULL;
 336   return E_NOINTERFACE;
 337 }
 338
 339 ULONG WINAPI CStdStubBuffer_AddRef(LPRPCSTUBBUFFER iface)
 340 {
 341   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 342   TRACE("(%p)->AddRef()\n",This);
 343   return InterlockedIncrement(&This->RefCount);
 344 }
 345
 346 ULONG WINAPI NdrCStdStubBuffer_Release(LPRPCSTUBBUFFER iface,
 347                                       LPPSFACTORYBUFFER pPSF)
 348 {
 349   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 350   ULONG refs;
 351
 352   TRACE("(%p)->Release()\n",This);
 353
 354   refs = InterlockedDecrement(&This->RefCount);
 355   if (!refs)
 356   {
 357     /* test_Release shows that native doesn't call Disconnect here.
 358        We'll leave it in for the time being. */
 359     IRpcStubBuffer_Disconnect(iface);
 360
 361     IPSFactoryBuffer_Release(pPSF);
 362     HeapFree(GetProcessHeap(),0,This);
 363   }
 364   return refs;
 365 }
 366
 367 ULONG WINAPI NdrCStdStubBuffer2_Release(LPRPCSTUBBUFFER iface,
 368                                         LPPSFACTORYBUFFER pPSF)
 369 {
 370     cstdstubbuffer_delegating_t *This = impl_from_delegating( iface );
 371     ULONG refs;
 372
 373     TRACE("(%p)->Release()\n", This);
 374
 375     refs = InterlockedDecrement(&This->stub_buffer.RefCount);
 376     if (!refs)
 377     {
 378         /* Just like NdrCStdStubBuffer_Release, we shouldn't call
 379            Disconnect here */
 380         IRpcStubBuffer_Disconnect((IRpcStubBuffer *)&This->stub_buffer);
 381
 382         IRpcStubBuffer_Release(This->base_stub);
 383         release_delegating_vtbl(This->base_obj);
 384
 385         IPSFactoryBuffer_Release(pPSF);
 386         HeapFree(GetProcessHeap(), 0, This);
 387     }
 388
 389     return refs;
 390 }
 391
 392 HRESULT WINAPI CStdStubBuffer_Connect(LPRPCSTUBBUFFER iface,
 393                                      LPUNKNOWN lpUnkServer)
 394 {
 395     CStdStubBuffer *This = (CStdStubBuffer *)iface;
 396     HRESULT r;
 397     IUnknown *new = NULL;
 398
 399     TRACE("(%p)->Connect(%p)\n",This,lpUnkServer);
 400
 401     r = IUnknown_QueryInterface(lpUnkServer, STUB_HEADER(This).piid, (void**)&new);
 402     new = InterlockedExchangePointer((void**)&This->pvServerObject, new);
 403     if(new)
 404         IUnknown_Release(new);
 405     return r;
 406 }
 407
 408 void WINAPI CStdStubBuffer_Disconnect(LPRPCSTUBBUFFER iface)
 409 {
 410     CStdStubBuffer *This = (CStdStubBuffer *)iface;
 411     IUnknown *old;
 412     TRACE("(%p)->Disconnect()\n",This);
 413
 414     old = InterlockedExchangePointer((void**)&This->pvServerObject, NULL);
 415
 416     if(old)
 417         IUnknown_Release(old);
 418 }
 419
 420 HRESULT WINAPI CStdStubBuffer_Invoke(LPRPCSTUBBUFFER iface,
 421                                     PRPCOLEMESSAGE pMsg,
 422                                     LPRPCCHANNELBUFFER pChannel)
 423 {
 424   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 425   DWORD dwPhase = STUB_UNMARSHAL;
 426   HRESULT hr = S_OK;
 427
 428   TRACE("(%p)->Invoke(%p,%p)\n",This,pMsg,pChannel);
 429
 430   __TRY
 431   {
 432     if (STUB_HEADER(This).pDispatchTable)
 433       STUB_HEADER(This).pDispatchTable[pMsg->iMethod](iface, pChannel, (PRPC_MESSAGE)pMsg, &dwPhase);
 434     else /* pure interpreted */
 435       NdrStubCall2(iface, pChannel, (PRPC_MESSAGE)pMsg, &dwPhase);
 436   }
 437   __EXCEPT(stub_filter)
 438   {
 439     DWORD dwExceptionCode = GetExceptionCode();
 440     WARN("a stub call failed with exception 0x%08x (%d)\n", dwExceptionCode, dwExceptionCode);
 441     if (FAILED(dwExceptionCode))
 442       hr = dwExceptionCode;
 443     else
 444       hr = HRESULT_FROM_WIN32(dwExceptionCode);
 445   }
 446   __ENDTRY
 447
 448   return hr;
 449 }
 450
 451 LPRPCSTUBBUFFER WINAPI CStdStubBuffer_IsIIDSupported(LPRPCSTUBBUFFER iface,
 452                                                     REFIID riid)
 453 {
 454   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 455   TRACE("(%p)->IsIIDSupported(%s)\n",This,debugstr_guid(riid));
 456   return IsEqualGUID(STUB_HEADER(This).piid, riid) ? iface : NULL;
 457 }
 458
 459 ULONG WINAPI CStdStubBuffer_CountRefs(LPRPCSTUBBUFFER iface)
 460 {
 461   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 462   TRACE("(%p)->CountRefs()\n",This);
 463   return This->RefCount;
 464 }
 465
 466 HRESULT WINAPI CStdStubBuffer_DebugServerQueryInterface(LPRPCSTUBBUFFER iface,
 467                                                        LPVOID *ppv)
 468 {
 469   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 470   TRACE("(%p)->DebugServerQueryInterface(%p)\n",This,ppv);
 471   return S_OK;
 472 }
 473
 474 void WINAPI CStdStubBuffer_DebugServerRelease(LPRPCSTUBBUFFER iface,
 475                                              LPVOID pv)
 476 {
 477   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 478   TRACE("(%p)->DebugServerRelease(%p)\n",This,pv);
 479 }
 480
 481 const IRpcStubBufferVtbl CStdStubBuffer_Vtbl =
 482 {
 483     CStdStubBuffer_QueryInterface,
 484     CStdStubBuffer_AddRef,
 485     NULL,
 486     CStdStubBuffer_Connect,
 487     CStdStubBuffer_Disconnect,
 488     CStdStubBuffer_Invoke,
 489     CStdStubBuffer_IsIIDSupported,
 490     CStdStubBuffer_CountRefs,
 491     CStdStubBuffer_DebugServerQueryInterface,
 492     CStdStubBuffer_DebugServerRelease
 493 };
 494
 495 static HRESULT WINAPI CStdStubBuffer_Delegating_Connect(LPRPCSTUBBUFFER iface,
 496                                                         LPUNKNOWN lpUnkServer)
 497 {
 498     cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
 499     HRESULT r;
 500     TRACE("(%p)->Connect(%p)\n", This, lpUnkServer);
 501
 502     r = CStdStubBuffer_Connect(iface, lpUnkServer);
 503     if(SUCCEEDED(r))
 504         r = IRpcStubBuffer_Connect(This->base_stub, (IUnknown*)&This->base_obj);
 505
 506     return r;
 507 }
 508
 509 static void WINAPI CStdStubBuffer_Delegating_Disconnect(LPRPCSTUBBUFFER iface)
 510 {
 511     cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
 512     TRACE("(%p)->Disconnect()\n", This);
 513
 514     IRpcStubBuffer_Disconnect(This->base_stub);
 515     CStdStubBuffer_Disconnect(iface);
 516 }
 517
 518 static ULONG WINAPI CStdStubBuffer_Delegating_CountRefs(LPRPCSTUBBUFFER iface)
 519 {
 520     cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
 521     ULONG ret;
 522     TRACE("(%p)->CountRefs()\n", This);
 523
 524     ret = CStdStubBuffer_CountRefs(iface);
 525     ret += IRpcStubBuffer_CountRefs(This->base_stub);
 526
 527     return ret;
 528 }
 529
 530 const IRpcStubBufferVtbl CStdStubBuffer_Delegating_Vtbl =
 531 {
 532     CStdStubBuffer_QueryInterface,
 533     CStdStubBuffer_AddRef,
 534     NULL,
 535     CStdStubBuffer_Delegating_Connect,
 536     CStdStubBuffer_Delegating_Disconnect,
 537     CStdStubBuffer_Invoke,
 538     CStdStubBuffer_IsIIDSupported,
 539     CStdStubBuffer_Delegating_CountRefs,
 540     CStdStubBuffer_DebugServerQueryInterface,
 541     CStdStubBuffer_DebugServerRelease
 542 };
 543
 544 const MIDL_SERVER_INFO *CStdStubBuffer_GetServerInfo(IRpcStubBuffer *iface)
 545 {
 546   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 547   return STUB_HEADER(This).pServerInfo;
 548 }
 549
 550 /************************************************************************
 551  *           NdrStubForwardingFunction [RPCRT4.@]
 552  */
 553 void __RPC_STUB NdrStubForwardingFunction( IRpcStubBuffer *iface, IRpcChannelBuffer *pChannel,
 554                                            PRPC_MESSAGE pMsg, DWORD *pdwStubPhase )
 555 {
 556     /* Note pMsg is passed intact since RPCOLEMESSAGE is basically a RPC_MESSAGE. */
 557
 558     cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
 559     HRESULT r = IRpcStubBuffer_Invoke(This->base_stub, (RPCOLEMESSAGE*)pMsg, pChannel);
 560     if(FAILED(r)) RpcRaiseException(r);
 561     return;
 562 }
 563
 564 /***********************************************************************
 565  *           NdrStubInitialize [RPCRT4.@]
 566  */
 567 void WINAPI NdrStubInitialize(PRPC_MESSAGE pRpcMsg,
 568                              PMIDL_STUB_MESSAGE pStubMsg,
 569                              PMIDL_STUB_DESC pStubDescriptor,
 570                              LPRPCCHANNELBUFFER pRpcChannelBuffer)
 571 {
 572   TRACE("(%p,%p,%p,%p)\n", pRpcMsg, pStubMsg, pStubDescriptor, pRpcChannelBuffer);
 573   NdrServerInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor);
 574   pStubMsg->pRpcChannelBuffer = pRpcChannelBuffer;
 575   IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
 576                                &pStubMsg->dwDestContext,
 577                                &pStubMsg->pvDestContext);
 578 }
 579
 580 /***********************************************************************
 581  *           NdrStubGetBuffer [RPCRT4.@]
 582  */
 583 void WINAPI NdrStubGetBuffer(LPRPCSTUBBUFFER iface,
 584                             LPRPCCHANNELBUFFER pRpcChannelBuffer,
 585                             PMIDL_STUB_MESSAGE pStubMsg)
 586 {
 587   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 588   HRESULT hr;
 589
 590   TRACE("(%p, %p, %p)\n", This, pRpcChannelBuffer, pStubMsg);
 591
 592   pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
 593   hr = IRpcChannelBuffer_GetBuffer(pRpcChannelBuffer,
 594     (RPCOLEMESSAGE *)pStubMsg->RpcMsg, STUB_HEADER(This).piid);
 595   if (FAILED(hr))
 596   {
 597     RpcRaiseException(hr);
 598     return;
 599   }
 600
 601   pStubMsg->Buffer = pStubMsg->RpcMsg->Buffer;
 602 }