dlls/rpcrt4/cstub.c

   1 /*
   2  * COM stub (CStdStubBuffer) implementation
   3  *
   4  * Copyright 2001 Ove Kåven, TransGaming Technologies
   5  * Copyright 2009 Alexandre Julliard
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include <stdarg.h>
  23
  24 #define COBJMACROS
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winerror.h"
  29 #include "excpt.h"
  30
  31 #include "objbase.h"
  32 #include "rpcproxy.h"
  33
  34 #include "wine/debug.h"
  35 #include "wine/exception.h"
  36
  37 #include "cpsf.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  40
  41 #define STUB_HEADER(This) (((const CInterfaceStubHeader*)((This)->lpVtbl))[-1])
  42
  43 static LONG WINAPI stub_filter(EXCEPTION_POINTERS *eptr)
  44 {
  45     if (eptr->ExceptionRecord->ExceptionFlags & EXCEPTION_NONCONTINUABLE)
  46         return EXCEPTION_CONTINUE_SEARCH;
  47     return EXCEPTION_EXECUTE_HANDLER;
  48 }
  49
  50 static inline cstdstubbuffer_delegating_t *impl_from_delegating( IRpcStubBuffer *iface )
  51 {
  52     return CONTAINING_RECORD(iface, cstdstubbuffer_delegating_t, stub_buffer);
  53 }
  54
  55 HRESULT CStdStubBuffer_Construct(REFIID riid,
  56                                  LPUNKNOWN pUnkServer,
  57                                  PCInterfaceName name,
  58                                  CInterfaceStubVtbl *vtbl,
  59                                  LPPSFACTORYBUFFER pPSFactory,
  60                                  LPRPCSTUBBUFFER *ppStub)
  61 {
  62   CStdStubBuffer *This;
  63   IUnknown *pvServer;
  64   HRESULT r;
  65   TRACE("(%p,%p,%p,%p) %s\n", pUnkServer, vtbl, pPSFactory, ppStub, name);
  66   TRACE("iid=%s\n", debugstr_guid(vtbl->header.piid));
  67   TRACE("vtbl=%p\n", &vtbl->Vtbl);
  68
  69   if (!IsEqualGUID(vtbl->header.piid, riid)) {
  70     ERR("IID mismatch during stub creation\n");
  71     return RPC_E_UNEXPECTED;
  72   }
  73
  74   r = IUnknown_QueryInterface(pUnkServer, riid, (void**)&pvServer);
  75   if(FAILED(r))
  76     return r;
  77
  78   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(CStdStubBuffer));
  79   if (!This) {
  80     IUnknown_Release(pvServer);
  81     return E_OUTOFMEMORY;
  82   }
  83
  84   This->lpVtbl = &vtbl->Vtbl;
  85   This->RefCount = 1;
  86   This->pvServerObject = pvServer;
  87   This->pPSFactory = pPSFactory;
  88   *ppStub = (LPRPCSTUBBUFFER)This;
  89
  90   IPSFactoryBuffer_AddRef(pPSFactory);
  91   return S_OK;
  92 }
  93
  94 static CRITICAL_SECTION delegating_vtbl_section;
  95 static CRITICAL_SECTION_DEBUG critsect_debug =
  96 {
  97     0, 0, &delegating_vtbl_section,
  98     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  99       0, 0, { (DWORD_PTR)(__FILE__ ": delegating_vtbl_section") }
 100 };
 101 static CRITICAL_SECTION delegating_vtbl_section = { &critsect_debug, -1, 0, 0, 0, 0 };
 102
 103 typedef struct
 104 {
 105     DWORD ref;
 106     DWORD size;
 107     IUnknownVtbl vtbl;
 108     /* remaining entries in vtbl */
 109 } ref_counted_vtbl;
 110
 111 static ref_counted_vtbl *current_vtbl;
 112
 113
 114 static HRESULT WINAPI delegating_QueryInterface(IUnknown *pUnk, REFIID iid, void **ppv)
 115 {
 116     *ppv = pUnk;
 117     return S_OK;
 118 }
 119
 120 static ULONG WINAPI delegating_AddRef(IUnknown *pUnk)
 121 {
 122     return 1;
 123 }
 124
 125 static ULONG WINAPI delegating_Release(IUnknown *pUnk)
 126 {
 127     return 1;
 128 }
 129
 130 /* The idea here is to replace the first param on the stack
 131    ie. This (which will point to cstdstubbuffer_delegating_t)
 132    with This->stub_buffer.pvServerObject and then jump to the
 133    relevant offset in This->stub_buffer.pvServerObject's vtbl.
 134 */
 135 #ifdef __i386__
 136
 137 #include "pshpack1.h"
 138 typedef struct {
 139     BYTE mov1[4];    /* mov 0x4(%esp),%eax     8b 44 24 04 */
 140     BYTE mov2[3];    /* mov 0x10(%eax),%eax    8b 40 10 */
 141     BYTE mov3[4];    /* mov %eax,0x4(%esp)     89 44 24 04 */
 142     BYTE mov4[2];    /* mov (%eax),%eax        8b 00 */
 143     BYTE mov5[2];    /* jmp *offset(%eax)      ff a0 offset */
 144     DWORD offset;
 145     BYTE pad[1];     /* nop                    90 */
 146 } vtbl_method_t;
 147 #include "poppack.h"
 148
 149 static const BYTE opcodes[20] = { 0x8b, 0x44, 0x24, 0x04, 0x8b, 0x40, 0x10, 0x89, 0x44, 0x24, 0x04,
 150                                   0x8b, 0x00, 0xff, 0xa0, 0, 0, 0, 0, 0x90 };
 151
 152 #elif defined(__x86_64__)
 153
 154 #include "pshpack1.h"
 155 typedef struct
 156 {
 157     BYTE mov1[4];    /* movq 0x20(%rcx),%rcx   48 8b 49 20 */
 158     BYTE mov2[3];    /* movq (%rcx),%rax       48 8b 01 */
 159     BYTE jmp[2];     /* jmp *offset(%rax)      ff a0 offset */
 160     DWORD offset;
 161     BYTE pad[3];     /* lea 0x0(%rsi),%rsi     48 8d 36 */
 162 } vtbl_method_t;
 163 #include "poppack.h"
 164
 165 static const BYTE opcodes[16] = { 0x48, 0x8b, 0x49, 0x20, 0x48, 0x8b, 0x01,
 166                                   0xff, 0xa0, 0, 0, 0, 0, 0x48, 0x8d, 0x36 };
 167 #elif defined(__arm__)
 168
 169 static const DWORD opcodes[] =
 170 {
 171     0xe52d4004,    /* push {r4} */
 172     0xe5900010,    /* ldr r0, [r0, #16] */
 173     0xe5904000,    /* ldr r4, [r0] */
 174     0xe59fc008,    /* ldr ip, [pc, #8] */
 175     0xe08cc004,    /* add ip, ip, r4 */
 176     0xe49d4004,    /* pop {r4} */
 177     0xe59cf000     /* ldr pc, [ip] */
 178 };
 179
 180 typedef struct
 181 {
 182     DWORD opcodes[ARRAY_SIZE(opcodes)];
 183     DWORD offset;
 184 } vtbl_method_t;
 185
 186 #elif defined(__aarch64__)
 187
 188 static const DWORD opcodes[] =
 189 {
 190     0xf9401000,   /* ldr x0, [x0,#32] */
 191     0xf9400010,   /* ldr x16, [x0] */
 192     0x18000071,   /* ldr w17, offset */
 193     0xf8716a10,   /* ldr x16, [x16,x17] */
 194     0xd61f0200    /* br x16 */
 195 };
 196
 197 typedef struct
 198 {
 199     DWORD opcodes[ARRAY_SIZE(opcodes)];
 200     DWORD offset;
 201 } vtbl_method_t;
 202
 203 #else
 204
 205 #warning You must implement delegated proxies/stubs for your CPU
 206 typedef struct
 207 {
 208     DWORD offset;
 209 } vtbl_method_t;
 210 static const BYTE opcodes[1];
 211
 212 #endif
 213
 214 #define BLOCK_SIZE 1024
 215 #define MAX_BLOCKS 64  /* 64k methods should be enough for anybody */
 216
 217 static const vtbl_method_t *method_blocks[MAX_BLOCKS];
 218
 219 static const vtbl_method_t *allocate_block( unsigned int num )
 220 {
 221     unsigned int i;
 222     vtbl_method_t *prev, *block;
 223     DWORD oldprot;
 224
 225     block = VirtualAlloc( NULL, BLOCK_SIZE * sizeof(*block),
 226                           MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE );
 227     if (!block) return NULL;
 228
 229     for (i = 0; i < BLOCK_SIZE; i++)
 230     {
 231         memcpy( &block[i], opcodes, sizeof(opcodes) );
 232         block[i].offset = (BLOCK_SIZE * num + i + 3) * sizeof(void *);
 233     }
 234     VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, &oldprot );
 235     prev = InterlockedCompareExchangePointer( (void **)&method_blocks[num], block, NULL );
 236     if (prev) /* someone beat us to it */
 237     {
 238         VirtualFree( block, 0, MEM_RELEASE );
 239         block = prev;
 240     }
 241     return block;
 242 }
 243
 244 static BOOL fill_delegated_stub_table(IUnknownVtbl *vtbl, DWORD num)
 245 {
 246     const void **entry = (const void **)(vtbl + 1);
 247     DWORD i, j;
 248
 249     if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
 250     {
 251         FIXME( "%u methods not supported\n", num );
 252         return FALSE;
 253     }
 254     vtbl->QueryInterface = delegating_QueryInterface;
 255     vtbl->AddRef = delegating_AddRef;
 256     vtbl->Release = delegating_Release;
 257     for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
 258     {
 259         const vtbl_method_t *block = method_blocks[i];
 260         if (!block && !(block = allocate_block( i ))) return FALSE;
 261         for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++) *entry++ = &block[j];
 262     }
 263     return TRUE;
 264 }
 265
 266 BOOL fill_delegated_proxy_table(IUnknownVtbl *vtbl, DWORD num)
 267 {
 268     const void **entry = (const void **)(vtbl + 1);
 269     DWORD i, j;
 270
 271     if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
 272     {
 273         FIXME( "%u methods not supported\n", num );
 274         return FALSE;
 275     }
 276     vtbl->QueryInterface = IUnknown_QueryInterface_Proxy;
 277     vtbl->AddRef = IUnknown_AddRef_Proxy;
 278     vtbl->Release = IUnknown_Release_Proxy;
 279     for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
 280     {
 281         const vtbl_method_t *block = method_blocks[i];
 282         if (!block && !(block = allocate_block( i ))) return FALSE;
 283         for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++, entry++)
 284             if (!*entry) *entry = &block[j];
 285     }
 286     return TRUE;
 287 }
 288
 289 IUnknownVtbl *get_delegating_vtbl(DWORD num_methods)
 290 {
 291     IUnknownVtbl *ret;
 292
 293     if (num_methods < 256) num_methods = 256;  /* avoid frequent reallocations */
 294
 295     EnterCriticalSection(&delegating_vtbl_section);
 296
 297     if(!current_vtbl || num_methods > current_vtbl->size)
 298     {
 299         ref_counted_vtbl *table = HeapAlloc(GetProcessHeap(), 0,
 300                                             FIELD_OFFSET(ref_counted_vtbl, vtbl) + num_methods * sizeof(void*));
 301         if (!table)
 302         {
 303             LeaveCriticalSection(&delegating_vtbl_section);
 304             return NULL;
 305         }
 306
 307         table->ref = 0;
 308         table->size = num_methods;
 309         fill_delegated_stub_table(&table->vtbl, num_methods);
 310
 311         if (current_vtbl && current_vtbl->ref == 0)
 312         {
 313             TRACE("freeing old table\n");
 314             HeapFree(GetProcessHeap(), 0, current_vtbl);
 315         }
 316         current_vtbl = table;
 317     }
 318
 319     current_vtbl->ref++;
 320     ret = &current_vtbl->vtbl;
 321     LeaveCriticalSection(&delegating_vtbl_section);
 322     return ret;
 323 }
 324
 325 void release_delegating_vtbl(IUnknownVtbl *vtbl)
 326 {
 327     ref_counted_vtbl *table = (ref_counted_vtbl*)((DWORD *)vtbl - 1);
 328
 329     EnterCriticalSection(&delegating_vtbl_section);
 330     table->ref--;
 331     TRACE("ref now %d\n", table->ref);
 332     if(table->ref == 0 && table != current_vtbl)
 333     {
 334         TRACE("... and we're not current so free'ing\n");
 335         HeapFree(GetProcessHeap(), 0, table);
 336     }
 337     LeaveCriticalSection(&delegating_vtbl_section);
 338 }
 339
 340 HRESULT CStdStubBuffer_Delegating_Construct(REFIID riid,
 341                                             LPUNKNOWN pUnkServer,
 342                                             PCInterfaceName name,
 343                                             CInterfaceStubVtbl *vtbl,
 344                                             REFIID delegating_iid,
 345                                             LPPSFACTORYBUFFER pPSFactory,
 346                                             LPRPCSTUBBUFFER *ppStub)
 347 {
 348     cstdstubbuffer_delegating_t *This;
 349     IUnknown *pvServer;
 350     HRESULT r;
 351
 352     TRACE("(%p,%p,%p,%p) %s\n", pUnkServer, vtbl, pPSFactory, ppStub, name);
 353     TRACE("iid=%s delegating to %s\n", debugstr_guid(vtbl->header.piid), debugstr_guid(delegating_iid));
 354     TRACE("vtbl=%p\n", &vtbl->Vtbl);
 355
 356     if (!IsEqualGUID(vtbl->header.piid, riid))
 357     {
 358         ERR("IID mismatch during stub creation\n");
 359         return RPC_E_UNEXPECTED;
 360     }
 361
 362     r = IUnknown_QueryInterface(pUnkServer, riid, (void**)&pvServer);
 363     if(FAILED(r)) return r;
 364
 365     This = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*This));
 366     if (!This)
 367     {
 368         IUnknown_Release(pvServer);
 369         return E_OUTOFMEMORY;
 370     }
 371
 372     This->base_obj = get_delegating_vtbl( vtbl->header.DispatchTableCount );
 373     r = create_stub(delegating_iid, (IUnknown*)&This->base_obj, &This->base_stub);
 374     if(FAILED(r))
 375     {
 376         release_delegating_vtbl(This->base_obj);
 377         HeapFree(GetProcessHeap(), 0, This);
 378         IUnknown_Release(pvServer);
 379         return r;
 380     }
 381
 382     This->stub_buffer.lpVtbl = &vtbl->Vtbl;
 383     This->stub_buffer.RefCount = 1;
 384     This->stub_buffer.pvServerObject = pvServer;
 385     This->stub_buffer.pPSFactory = pPSFactory;
 386     *ppStub = (LPRPCSTUBBUFFER)&This->stub_buffer;
 387
 388     IPSFactoryBuffer_AddRef(pPSFactory);
 389     return S_OK;
 390 }
 391
 392 HRESULT WINAPI CStdStubBuffer_QueryInterface(LPRPCSTUBBUFFER iface,
 393                                             REFIID riid,
 394                                             LPVOID *obj)
 395 {
 396   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 397   TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
 398
 399   if (IsEqualIID(&IID_IUnknown, riid) ||
 400       IsEqualIID(&IID_IRpcStubBuffer, riid))
 401   {
 402     IRpcStubBuffer_AddRef(iface);
 403     *obj = iface;
 404     return S_OK;
 405   }
 406   *obj = NULL;
 407   return E_NOINTERFACE;
 408 }
 409
 410 ULONG WINAPI CStdStubBuffer_AddRef(LPRPCSTUBBUFFER iface)
 411 {
 412   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 413   TRACE("(%p)->AddRef()\n",This);
 414   return InterlockedIncrement(&This->RefCount);
 415 }
 416
 417 ULONG WINAPI NdrCStdStubBuffer_Release(LPRPCSTUBBUFFER iface,
 418                                       LPPSFACTORYBUFFER pPSF)
 419 {
 420   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 421   ULONG refs;
 422
 423   TRACE("(%p)->Release()\n",This);
 424
 425   refs = InterlockedDecrement(&This->RefCount);
 426   if (!refs)
 427   {
 428     /* test_Release shows that native doesn't call Disconnect here.
 429        We'll leave it in for the time being. */
 430     IRpcStubBuffer_Disconnect(iface);
 431
 432     IPSFactoryBuffer_Release(pPSF);
 433     HeapFree(GetProcessHeap(),0,This);
 434   }
 435   return refs;
 436 }
 437
 438 ULONG WINAPI NdrCStdStubBuffer2_Release(LPRPCSTUBBUFFER iface,
 439                                         LPPSFACTORYBUFFER pPSF)
 440 {
 441     cstdstubbuffer_delegating_t *This = impl_from_delegating( iface );
 442     ULONG refs;
 443
 444     TRACE("(%p)->Release()\n", This);
 445
 446     refs = InterlockedDecrement(&This->stub_buffer.RefCount);
 447     if (!refs)
 448     {
 449         /* Just like NdrCStdStubBuffer_Release, we shouldn't call
 450            Disconnect here */
 451         IRpcStubBuffer_Disconnect((IRpcStubBuffer *)&This->stub_buffer);
 452
 453         IRpcStubBuffer_Release(This->base_stub);
 454         release_delegating_vtbl(This->base_obj);
 455
 456         IPSFactoryBuffer_Release(pPSF);
 457         HeapFree(GetProcessHeap(), 0, This);
 458     }
 459
 460     return refs;
 461 }
 462
 463 HRESULT WINAPI CStdStubBuffer_Connect(LPRPCSTUBBUFFER iface,
 464                                      LPUNKNOWN lpUnkServer)
 465 {
 466     CStdStubBuffer *This = (CStdStubBuffer *)iface;
 467     HRESULT r;
 468     IUnknown *new = NULL;
 469
 470     TRACE("(%p)->Connect(%p)\n",This,lpUnkServer);
 471
 472     r = IUnknown_QueryInterface(lpUnkServer, STUB_HEADER(This).piid, (void**)&new);
 473     new = InterlockedExchangePointer((void**)&This->pvServerObject, new);
 474     if(new)
 475         IUnknown_Release(new);
 476     return r;
 477 }
 478
 479 void WINAPI CStdStubBuffer_Disconnect(LPRPCSTUBBUFFER iface)
 480 {
 481     CStdStubBuffer *This = (CStdStubBuffer *)iface;
 482     IUnknown *old;
 483     TRACE("(%p)->Disconnect()\n",This);
 484
 485     old = InterlockedExchangePointer((void**)&This->pvServerObject, NULL);
 486
 487     if(old)
 488         IUnknown_Release(old);
 489 }
 490
 491 HRESULT WINAPI CStdStubBuffer_Invoke(LPRPCSTUBBUFFER iface,
 492                                     PRPCOLEMESSAGE pMsg,
 493                                     LPRPCCHANNELBUFFER pChannel)
 494 {
 495   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 496   DWORD dwPhase = STUB_UNMARSHAL;
 497   HRESULT hr = S_OK;
 498
 499   TRACE("(%p)->Invoke(%p,%p)\n",This,pMsg,pChannel);
 500
 501   __TRY
 502   {
 503     if (STUB_HEADER(This).pDispatchTable)
 504       STUB_HEADER(This).pDispatchTable[pMsg->iMethod](iface, pChannel, (PRPC_MESSAGE)pMsg, &dwPhase);
 505     else /* pure interpreted */
 506       NdrStubCall2(iface, pChannel, (PRPC_MESSAGE)pMsg, &dwPhase);
 507   }
 508   __EXCEPT(stub_filter)
 509   {
 510     DWORD dwExceptionCode = GetExceptionCode();
 511     WARN("a stub call failed with exception 0x%08x (%d)\n", dwExceptionCode, dwExceptionCode);
 512     if (FAILED(dwExceptionCode))
 513       hr = dwExceptionCode;
 514     else
 515       hr = HRESULT_FROM_WIN32(dwExceptionCode);
 516   }
 517   __ENDTRY
 518
 519   return hr;
 520 }
 521
 522 LPRPCSTUBBUFFER WINAPI CStdStubBuffer_IsIIDSupported(LPRPCSTUBBUFFER iface,
 523                                                     REFIID riid)
 524 {
 525   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 526   TRACE("(%p)->IsIIDSupported(%s)\n",This,debugstr_guid(riid));
 527   return IsEqualGUID(STUB_HEADER(This).piid, riid) ? iface : NULL;
 528 }
 529
 530 ULONG WINAPI CStdStubBuffer_CountRefs(LPRPCSTUBBUFFER iface)
 531 {
 532   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 533   TRACE("(%p)->CountRefs()\n",This);
 534   return This->RefCount;
 535 }
 536
 537 HRESULT WINAPI CStdStubBuffer_DebugServerQueryInterface(LPRPCSTUBBUFFER iface,
 538                                                        LPVOID *ppv)
 539 {
 540   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 541   TRACE("(%p)->DebugServerQueryInterface(%p)\n",This,ppv);
 542   return S_OK;
 543 }
 544
 545 void WINAPI CStdStubBuffer_DebugServerRelease(LPRPCSTUBBUFFER iface,
 546                                              LPVOID pv)
 547 {
 548   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 549   TRACE("(%p)->DebugServerRelease(%p)\n",This,pv);
 550 }
 551
 552 const IRpcStubBufferVtbl CStdStubBuffer_Vtbl =
 553 {
 554     CStdStubBuffer_QueryInterface,
 555     CStdStubBuffer_AddRef,
 556     NULL,
 557     CStdStubBuffer_Connect,
 558     CStdStubBuffer_Disconnect,
 559     CStdStubBuffer_Invoke,
 560     CStdStubBuffer_IsIIDSupported,
 561     CStdStubBuffer_CountRefs,
 562     CStdStubBuffer_DebugServerQueryInterface,
 563     CStdStubBuffer_DebugServerRelease
 564 };
 565
 566 static HRESULT WINAPI CStdStubBuffer_Delegating_Connect(LPRPCSTUBBUFFER iface,
 567                                                         LPUNKNOWN lpUnkServer)
 568 {
 569     cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
 570     HRESULT r;
 571     TRACE("(%p)->Connect(%p)\n", This, lpUnkServer);
 572
 573     r = CStdStubBuffer_Connect(iface, lpUnkServer);
 574     if(SUCCEEDED(r))
 575         r = IRpcStubBuffer_Connect(This->base_stub, (IUnknown*)&This->base_obj);
 576
 577     return r;
 578 }
 579
 580 static void WINAPI CStdStubBuffer_Delegating_Disconnect(LPRPCSTUBBUFFER iface)
 581 {
 582     cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
 583     TRACE("(%p)->Disconnect()\n", This);
 584
 585     IRpcStubBuffer_Disconnect(This->base_stub);
 586     CStdStubBuffer_Disconnect(iface);
 587 }
 588
 589 static ULONG WINAPI CStdStubBuffer_Delegating_CountRefs(LPRPCSTUBBUFFER iface)
 590 {
 591     cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
 592     ULONG ret;
 593     TRACE("(%p)->CountRefs()\n", This);
 594
 595     ret = CStdStubBuffer_CountRefs(iface);
 596     ret += IRpcStubBuffer_CountRefs(This->base_stub);
 597
 598     return ret;
 599 }
 600
 601 const IRpcStubBufferVtbl CStdStubBuffer_Delegating_Vtbl =
 602 {
 603     CStdStubBuffer_QueryInterface,
 604     CStdStubBuffer_AddRef,
 605     NULL,
 606     CStdStubBuffer_Delegating_Connect,
 607     CStdStubBuffer_Delegating_Disconnect,
 608     CStdStubBuffer_Invoke,
 609     CStdStubBuffer_IsIIDSupported,
 610     CStdStubBuffer_Delegating_CountRefs,
 611     CStdStubBuffer_DebugServerQueryInterface,
 612     CStdStubBuffer_DebugServerRelease
 613 };
 614
 615 const MIDL_SERVER_INFO *CStdStubBuffer_GetServerInfo(IRpcStubBuffer *iface)
 616 {
 617   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 618   return STUB_HEADER(This).pServerInfo;
 619 }
 620
 621 /************************************************************************
 622  *           NdrStubForwardingFunction [RPCRT4.@]
 623  */
 624 void __RPC_STUB NdrStubForwardingFunction( IRpcStubBuffer *iface, IRpcChannelBuffer *pChannel,
 625                                            PRPC_MESSAGE pMsg, DWORD *pdwStubPhase )
 626 {
 627     /* Note pMsg is passed intact since RPCOLEMESSAGE is basically a RPC_MESSAGE. */
 628
 629     cstdstubbuffer_delegating_t *This = impl_from_delegating(iface);
 630     HRESULT r = IRpcStubBuffer_Invoke(This->base_stub, (RPCOLEMESSAGE*)pMsg, pChannel);
 631     if(FAILED(r)) RpcRaiseException(r);
 632     return;
 633 }
 634
 635 /***********************************************************************
 636  *           NdrStubInitialize [RPCRT4.@]
 637  */
 638 void WINAPI NdrStubInitialize(PRPC_MESSAGE pRpcMsg,
 639                              PMIDL_STUB_MESSAGE pStubMsg,
 640                              PMIDL_STUB_DESC pStubDescriptor,
 641                              LPRPCCHANNELBUFFER pRpcChannelBuffer)
 642 {
 643   TRACE("(%p,%p,%p,%p)\n", pRpcMsg, pStubMsg, pStubDescriptor, pRpcChannelBuffer);
 644   NdrServerInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor);
 645   pStubMsg->pRpcChannelBuffer = pRpcChannelBuffer;
 646   IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
 647                                &pStubMsg->dwDestContext,
 648                                &pStubMsg->pvDestContext);
 649 }
 650
 651 /***********************************************************************
 652  *           NdrStubGetBuffer [RPCRT4.@]
 653  */
 654 void WINAPI NdrStubGetBuffer(LPRPCSTUBBUFFER iface,
 655                             LPRPCCHANNELBUFFER pRpcChannelBuffer,
 656                             PMIDL_STUB_MESSAGE pStubMsg)
 657 {
 658   CStdStubBuffer *This = (CStdStubBuffer *)iface;
 659   HRESULT hr;
 660
 661   TRACE("(%p, %p, %p)\n", This, pRpcChannelBuffer, pStubMsg);
 662
 663   pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
 664   hr = IRpcChannelBuffer_GetBuffer(pRpcChannelBuffer,
 665     (RPCOLEMESSAGE *)pStubMsg->RpcMsg, STUB_HEADER(This).piid);
 666   if (FAILED(hr))
 667   {
 668     RpcRaiseException(hr);
 669     return;
 670   }
 671
 672   pStubMsg->Buffer = pStubMsg->RpcMsg->Buffer;
 673 }