git.oblomov.eu Git - wine/blob - dlls/rpcrt4/cproxy.c

   1 /*
   2  * COM proxy 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  * TODO: Handle non-i386 architectures
  22  */
  23
  24 #include "config.h"
  25 #include "wine/port.h"
  26
  27 #include <stdarg.h>
  28
  29 #define COBJMACROS
  30
  31 #include "windef.h"
  32 #include "winbase.h"
  33 #include "winerror.h"
  34
  35 #include "objbase.h"
  36 #include "rpcproxy.h"
  37
  38 #include "cpsf.h"
  39 #include "ndr_misc.h"
  40 #include "ndr_stubless.h"
  41 #include "wine/debug.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  44
  45 /* I don't know what MS's std proxy structure looks like,
  46    so this probably doesn't match, but that shouldn't matter */
  47 typedef struct {
  48   IRpcProxyBuffer IRpcProxyBuffer_iface;
  49   LPVOID *PVtbl;
  50   LONG RefCount;
  51   const IID* piid;
  52   LPUNKNOWN pUnkOuter;
  53   IUnknown *base_object;  /* must be at offset 0x10 from PVtbl */
  54   IRpcProxyBuffer *base_proxy;
  55   PCInterfaceName name;
  56   LPPSFACTORYBUFFER pPSFactory;
  57   LPRPCCHANNELBUFFER pChannel;
  58 } StdProxyImpl;
  59
  60 static const IRpcProxyBufferVtbl StdProxy_Vtbl;
  61
  62 static inline StdProxyImpl *impl_from_IRpcProxyBuffer(IRpcProxyBuffer *iface)
  63 {
  64     return CONTAINING_RECORD(iface, StdProxyImpl, IRpcProxyBuffer_iface);
  65 }
  66
  67 static inline StdProxyImpl *impl_from_proxy_obj( void *iface )
  68 {
  69     return CONTAINING_RECORD(iface, StdProxyImpl, PVtbl);
  70 }
  71
  72 #ifdef __i386__
  73
  74 extern void call_stubless_func(void);
  75 __ASM_GLOBAL_FUNC(call_stubless_func,
  76                   "movl 4(%esp),%ecx\n\t"         /* This pointer */
  77                   "movl (%ecx),%ecx\n\t"          /* This->lpVtbl */
  78                   "movl -8(%ecx),%ecx\n\t"        /* MIDL_STUBLESS_PROXY_INFO */
  79                   "movl 8(%ecx),%edx\n\t"         /* info->FormatStringOffset */
  80                   "movzwl (%edx,%eax,2),%edx\n\t" /* FormatStringOffset[index] */
  81                   "addl 4(%ecx),%edx\n\t"         /* info->ProcFormatString + offset */
  82                   "movzwl 8(%edx),%eax\n\t"       /* arguments size */
  83                   "pushl %eax\n\t"
  84                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  85                   "leal 8(%esp),%eax\n\t"         /* &This */
  86                   "pushl %eax\n\t"
  87                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  88                   "pushl %edx\n\t"                /* format string */
  89                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  90                   "pushl (%ecx)\n\t"              /* info->pStubDesc */
  91                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  92                   "call " __ASM_NAME("ndr_client_call") "\n\t"
  93                   "leal 12(%esp),%esp\n\t"
  94                   __ASM_CFI(".cfi_adjust_cfa_offset -12\n\t")
  95                   "popl %edx\n\t"                 /* arguments size */
  96                   __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
  97                   "movl (%esp),%ecx\n\t"  /* return address */
  98                   "addl %edx,%esp\n\t"
  99                   "jmp *%ecx" );
 100
 101 #include "pshpack1.h"
 102 struct thunk
 103 {
 104   BYTE mov_eax;
 105   DWORD index;
 106   BYTE jmp;
 107   LONG handler;
 108 };
 109 #include "poppack.h"
 110
 111 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 112 {
 113     thunk->mov_eax = 0xb8; /* movl $n,%eax */
 114     thunk->index   = index;
 115     thunk->jmp     = 0xe9; /* jmp */
 116     thunk->handler = (char *)call_stubless_func - (char *)(&thunk->handler + 1);
 117 }
 118
 119 #else  /* __i386__ */
 120
 121 #warning You must implement stubless proxies for your CPU
 122
 123 struct thunk
 124 {
 125   DWORD index;
 126 };
 127
 128 static inline void init_thunk( struct thunk *thunk, unsigned int index )
 129 {
 130     thunk->index = index;
 131 }
 132
 133 #endif  /* __i386__ */
 134
 135 #define BLOCK_SIZE 1024
 136 #define MAX_BLOCKS 64  /* 64k methods should be enough for anybody */
 137
 138 static const struct thunk *method_blocks[MAX_BLOCKS];
 139
 140 static const struct thunk *allocate_block( unsigned int num )
 141 {
 142     unsigned int i;
 143     struct thunk *prev, *block;
 144
 145     block = VirtualAlloc( NULL, BLOCK_SIZE * sizeof(*block),
 146                           MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE );
 147     if (!block) return NULL;
 148
 149     for (i = 0; i < BLOCK_SIZE; i++) init_thunk( &block[i], BLOCK_SIZE * num + i + 3 );
 150     VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, NULL );
 151     prev = InterlockedCompareExchangePointer( (void **)&method_blocks[num], block, NULL );
 152     if (prev) /* someone beat us to it */
 153     {
 154         VirtualFree( block, 0, MEM_RELEASE );
 155         block = prev;
 156     }
 157     return block;
 158 }
 159
 160 static BOOL fill_stubless_table( IUnknownVtbl *vtbl, DWORD num )
 161 {
 162     const void **entry = (const void **)(vtbl + 1);
 163     DWORD i, j;
 164
 165     if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
 166     {
 167         FIXME( "%u methods not supported\n", num );
 168         return FALSE;
 169     }
 170     for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
 171     {
 172         const struct thunk *block = method_blocks[i];
 173         if (!block && !(block = allocate_block( i ))) return FALSE;
 174         for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++, entry++)
 175             if (*entry == (LPVOID)-1) *entry = &block[j];
 176     }
 177     return TRUE;
 178 }
 179
 180 HRESULT StdProxy_Construct(REFIID riid,
 181                            LPUNKNOWN pUnkOuter,
 182                            const ProxyFileInfo *ProxyInfo,
 183                            int Index,
 184                            LPPSFACTORYBUFFER pPSFactory,
 185                            LPRPCPROXYBUFFER *ppProxy,
 186                            LPVOID *ppvObj)
 187 {
 188   StdProxyImpl *This;
 189   PCInterfaceName name = ProxyInfo->pNamesArray[Index];
 190   CInterfaceProxyVtbl *vtbl = ProxyInfo->pProxyVtblList[Index];
 191
 192   TRACE("(%p,%p,%p,%p,%p) %s\n", pUnkOuter, vtbl, pPSFactory, ppProxy, ppvObj, name);
 193
 194   /* TableVersion = 2 means it is the stubless version of CInterfaceProxyVtbl */
 195   if (ProxyInfo->TableVersion > 1) {
 196     ULONG count = ProxyInfo->pStubVtblList[Index]->header.DispatchTableCount;
 197     vtbl = (CInterfaceProxyVtbl *)((const void **)vtbl + 1);
 198     TRACE("stubless vtbl %p: count=%d\n", vtbl->Vtbl, count );
 199     fill_stubless_table( (IUnknownVtbl *)vtbl->Vtbl, count );
 200   }
 201
 202   if (!IsEqualGUID(vtbl->header.piid, riid)) {
 203     ERR("IID mismatch during proxy creation\n");
 204     return RPC_E_UNEXPECTED;
 205   }
 206
 207   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(StdProxyImpl));
 208   if (!This) return E_OUTOFMEMORY;
 209
 210   if (!pUnkOuter) pUnkOuter = (IUnknown *)This;
 211   This->IRpcProxyBuffer_iface.lpVtbl = &StdProxy_Vtbl;
 212   This->PVtbl = vtbl->Vtbl;
 213   /* one reference for the proxy */
 214   This->RefCount = 1;
 215   This->piid = vtbl->header.piid;
 216   This->base_object = NULL;
 217   This->base_proxy = NULL;
 218   This->pUnkOuter = pUnkOuter;
 219   This->name = name;
 220   This->pPSFactory = pPSFactory;
 221   This->pChannel = NULL;
 222
 223   if(ProxyInfo->pDelegatedIIDs && ProxyInfo->pDelegatedIIDs[Index])
 224   {
 225       HRESULT r = create_proxy( ProxyInfo->pDelegatedIIDs[Index], NULL,
 226                                 &This->base_proxy, (void **)&This->base_object );
 227       if (FAILED(r))
 228       {
 229           HeapFree( GetProcessHeap(), 0, This );
 230           return r;
 231       }
 232   }
 233
 234   *ppProxy = &This->IRpcProxyBuffer_iface;
 235   *ppvObj = &This->PVtbl;
 236   IUnknown_AddRef((IUnknown *)*ppvObj);
 237   IPSFactoryBuffer_AddRef(pPSFactory);
 238
 239   TRACE( "iid=%s this %p proxy %p obj %p vtbl %p base proxy %p base obj %p\n",
 240          debugstr_guid(riid), This, *ppProxy, *ppvObj, This->PVtbl, This->base_proxy, This->base_object );
 241   return S_OK;
 242 }
 243
 244 static HRESULT WINAPI StdProxy_QueryInterface(LPRPCPROXYBUFFER iface,
 245                                              REFIID riid,
 246                                              LPVOID *obj)
 247 {
 248   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 249   TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
 250
 251   if (IsEqualGUID(&IID_IUnknown,riid) ||
 252       IsEqualGUID(This->piid,riid)) {
 253     *obj = &This->PVtbl;
 254     InterlockedIncrement(&This->RefCount);
 255     return S_OK;
 256   }
 257
 258   if (IsEqualGUID(&IID_IRpcProxyBuffer,riid)) {
 259     *obj = &This->IRpcProxyBuffer_iface;
 260     InterlockedIncrement(&This->RefCount);
 261     return S_OK;
 262   }
 263
 264   return E_NOINTERFACE;
 265 }
 266
 267 static ULONG WINAPI StdProxy_AddRef(LPRPCPROXYBUFFER iface)
 268 {
 269   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 270   TRACE("(%p)->AddRef()\n",This);
 271
 272   return InterlockedIncrement(&This->RefCount);
 273 }
 274
 275 static ULONG WINAPI StdProxy_Release(LPRPCPROXYBUFFER iface)
 276 {
 277   ULONG refs;
 278   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 279   TRACE("(%p)->Release()\n",This);
 280
 281   refs = InterlockedDecrement(&This->RefCount);
 282   if (!refs)
 283   {
 284     if (This->pChannel)
 285       IRpcProxyBuffer_Disconnect(&This->IRpcProxyBuffer_iface);
 286
 287     if (This->base_object) IUnknown_Release( This->base_object );
 288     if (This->base_proxy) IRpcProxyBuffer_Release( This->base_proxy );
 289
 290     IPSFactoryBuffer_Release(This->pPSFactory);
 291     HeapFree(GetProcessHeap(),0,This);
 292   }
 293
 294   return refs;
 295 }
 296
 297 static HRESULT WINAPI StdProxy_Connect(LPRPCPROXYBUFFER iface,
 298                                       LPRPCCHANNELBUFFER pChannel)
 299 {
 300   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 301   TRACE("(%p)->Connect(%p)\n",This,pChannel);
 302
 303   This->pChannel = pChannel;
 304   IRpcChannelBuffer_AddRef(pChannel);
 305   if (This->base_proxy) IRpcProxyBuffer_Connect( This->base_proxy, pChannel );
 306   return S_OK;
 307 }
 308
 309 static VOID WINAPI StdProxy_Disconnect(LPRPCPROXYBUFFER iface)
 310 {
 311   StdProxyImpl *This = impl_from_IRpcProxyBuffer(iface);
 312   TRACE("(%p)->Disconnect()\n",This);
 313
 314   if (This->base_proxy) IRpcProxyBuffer_Disconnect( This->base_proxy );
 315
 316   IRpcChannelBuffer_Release(This->pChannel);
 317   This->pChannel = NULL;
 318 }
 319
 320 static const IRpcProxyBufferVtbl StdProxy_Vtbl =
 321 {
 322   StdProxy_QueryInterface,
 323   StdProxy_AddRef,
 324   StdProxy_Release,
 325   StdProxy_Connect,
 326   StdProxy_Disconnect
 327 };
 328
 329 static void StdProxy_GetChannel(LPVOID iface,
 330                                    LPRPCCHANNELBUFFER *ppChannel)
 331 {
 332   StdProxyImpl *This = impl_from_proxy_obj( iface );
 333   TRACE("(%p)->GetChannel(%p) %s\n",This,ppChannel,This->name);
 334
 335   *ppChannel = This->pChannel;
 336 }
 337
 338 static void StdProxy_GetIID(LPVOID iface,
 339                                const IID **ppiid)
 340 {
 341   StdProxyImpl *This = impl_from_proxy_obj( iface );
 342   TRACE("(%p)->GetIID(%p) %s\n",This,ppiid,This->name);
 343
 344   *ppiid = This->piid;
 345 }
 346
 347 HRESULT WINAPI IUnknown_QueryInterface_Proxy(LPUNKNOWN iface,
 348                                             REFIID riid,
 349                                             LPVOID *ppvObj)
 350 {
 351   StdProxyImpl *This = impl_from_proxy_obj( iface );
 352   TRACE("(%p)->QueryInterface(%s,%p) %s\n",This,debugstr_guid(riid),ppvObj,This->name);
 353   return IUnknown_QueryInterface(This->pUnkOuter,riid,ppvObj);
 354 }
 355
 356 ULONG WINAPI IUnknown_AddRef_Proxy(LPUNKNOWN iface)
 357 {
 358   StdProxyImpl *This = impl_from_proxy_obj( iface );
 359   TRACE("(%p)->AddRef() %s\n",This,This->name);
 360   return IUnknown_AddRef(This->pUnkOuter);
 361 }
 362
 363 ULONG WINAPI IUnknown_Release_Proxy(LPUNKNOWN iface)
 364 {
 365   StdProxyImpl *This = impl_from_proxy_obj( iface );
 366   TRACE("(%p)->Release() %s\n",This,This->name);
 367   return IUnknown_Release(This->pUnkOuter);
 368 }
 369
 370 /***********************************************************************
 371  *           NdrProxyInitialize [RPCRT4.@]
 372  */
 373 void WINAPI NdrProxyInitialize(void *This,
 374                               PRPC_MESSAGE pRpcMsg,
 375                               PMIDL_STUB_MESSAGE pStubMsg,
 376                               PMIDL_STUB_DESC pStubDescriptor,
 377                               unsigned int ProcNum)
 378 {
 379   TRACE("(%p,%p,%p,%p,%d)\n", This, pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 380   NdrClientInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 381   StdProxy_GetChannel(This, &pStubMsg->pRpcChannelBuffer);
 382   IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
 383                                &pStubMsg->dwDestContext,
 384                                &pStubMsg->pvDestContext);
 385   TRACE("channel=%p\n", pStubMsg->pRpcChannelBuffer);
 386 }
 387
 388 /***********************************************************************
 389  *           NdrProxyGetBuffer [RPCRT4.@]
 390  */
 391 void WINAPI NdrProxyGetBuffer(void *This,
 392                              PMIDL_STUB_MESSAGE pStubMsg)
 393 {
 394   HRESULT hr;
 395   const IID *riid = NULL;
 396
 397   TRACE("(%p,%p)\n", This, pStubMsg);
 398   pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
 399   pStubMsg->dwStubPhase = PROXY_GETBUFFER;
 400   StdProxy_GetIID(This, &riid);
 401   hr = IRpcChannelBuffer_GetBuffer(pStubMsg->pRpcChannelBuffer,
 402                                   (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 403                                   riid);
 404   if (FAILED(hr))
 405   {
 406     RpcRaiseException(hr);
 407     return;
 408   }
 409   pStubMsg->fBufferValid = TRUE;
 410   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 411   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 412   pStubMsg->Buffer = pStubMsg->BufferStart;
 413   pStubMsg->dwStubPhase = PROXY_MARSHAL;
 414 }
 415
 416 /***********************************************************************
 417  *           NdrProxySendReceive [RPCRT4.@]
 418  */
 419 void WINAPI NdrProxySendReceive(void *This,
 420                                PMIDL_STUB_MESSAGE pStubMsg)
 421 {
 422   ULONG Status = 0;
 423   HRESULT hr;
 424
 425   TRACE("(%p,%p)\n", This, pStubMsg);
 426
 427   if (!pStubMsg->pRpcChannelBuffer)
 428   {
 429     WARN("Trying to use disconnected proxy %p\n", This);
 430     RpcRaiseException(RPC_E_DISCONNECTED);
 431   }
 432
 433   pStubMsg->dwStubPhase = PROXY_SENDRECEIVE;
 434   /* avoid sending uninitialised parts of the buffer on the wire */
 435   pStubMsg->RpcMsg->BufferLength = pStubMsg->Buffer - (unsigned char *)pStubMsg->RpcMsg->Buffer;
 436   hr = IRpcChannelBuffer_SendReceive(pStubMsg->pRpcChannelBuffer,
 437                                     (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 438                                     &Status);
 439   pStubMsg->dwStubPhase = PROXY_UNMARSHAL;
 440   pStubMsg->BufferLength = pStubMsg->RpcMsg->BufferLength;
 441   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 442   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 443   pStubMsg->Buffer = pStubMsg->BufferStart;
 444
 445   /* raise exception if call failed */
 446   if (hr == RPC_S_CALL_FAILED) RpcRaiseException(*(DWORD*)pStubMsg->Buffer);
 447   else if (FAILED(hr)) RpcRaiseException(hr);
 448 }
 449
 450 /***********************************************************************
 451  *           NdrProxyFreeBuffer [RPCRT4.@]
 452  */
 453 void WINAPI NdrProxyFreeBuffer(void *This,
 454                               PMIDL_STUB_MESSAGE pStubMsg)
 455 {
 456   TRACE("(%p,%p)\n", This, pStubMsg);
 457
 458   if (pStubMsg->fBufferValid)
 459   {
 460     IRpcChannelBuffer_FreeBuffer(pStubMsg->pRpcChannelBuffer,
 461                                  (RPCOLEMESSAGE*)pStubMsg->RpcMsg);
 462     pStubMsg->fBufferValid = TRUE;
 463   }
 464 }
 465
 466 /***********************************************************************
 467  *           NdrProxyErrorHandler [RPCRT4.@]
 468  */
 469 HRESULT WINAPI NdrProxyErrorHandler(DWORD dwExceptionCode)
 470 {
 471   WARN("(0x%08x): a proxy call failed\n", dwExceptionCode);
 472
 473   if (FAILED(dwExceptionCode))
 474     return dwExceptionCode;
 475   else
 476     return HRESULT_FROM_WIN32(dwExceptionCode);
 477 }
 478
 479 HRESULT WINAPI
 480 CreateProxyFromTypeInfo( LPTYPEINFO pTypeInfo, LPUNKNOWN pUnkOuter, REFIID riid,
 481                          LPRPCPROXYBUFFER *ppProxy, LPVOID *ppv )
 482 {
 483     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 484     HMODULE hUser32 = LoadLibraryA("user32");
 485     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 486
 487     FIXME("%p %p %s %p %p\n", pTypeInfo, pUnkOuter, debugstr_guid(riid), ppProxy, ppv);
 488     if (pMessageBoxA)
 489     {
 490         pMessageBoxA(NULL,
 491             "The native implementation of OLEAUT32.DLL cannot be used "
 492             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 493             "Wine: Unimplemented CreateProxyFromTypeInfo",
 494             0x10);
 495         ExitProcess(1);
 496     }
 497     return E_NOTIMPL;
 498 }
 499
 500 HRESULT WINAPI
 501 CreateStubFromTypeInfo(ITypeInfo *pTypeInfo, REFIID riid, IUnknown *pUnkServer,
 502                        IRpcStubBuffer **ppStub )
 503 {
 504     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 505     HMODULE hUser32 = LoadLibraryA("user32");
 506     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 507
 508     FIXME("%p %s %p %p\n", pTypeInfo, debugstr_guid(riid), pUnkServer, ppStub);
 509     if (pMessageBoxA)
 510     {
 511         pMessageBoxA(NULL,
 512             "The native implementation of OLEAUT32.DLL cannot be used "
 513             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 514             "Wine: Unimplemented CreateProxyFromTypeInfo",
 515             0x10);
 516         ExitProcess(1);
 517     }
 518     return E_NOTIMPL;
 519 }