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