dll/win32/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 "wine/debug.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  43
  44 /* I don't know what MS's std proxy structure looks like,
  45    so this probably doesn't match, but that shouldn't matter */
  46 typedef struct {
  47   const IRpcProxyBufferVtbl *lpVtbl;
  48   LPVOID *PVtbl;
  49   LONG RefCount;
  50   const IID* piid;
  51   LPUNKNOWN pUnkOuter;
  52   IUnknown *base_object;  /* must be at offset 0x10 from PVtbl */
  53   IRpcProxyBuffer *base_proxy;
  54   PCInterfaceName name;
  55   LPPSFACTORYBUFFER pPSFactory;
  56   LPRPCCHANNELBUFFER pChannel;
  57 } StdProxyImpl;
  58
  59 static const IRpcProxyBufferVtbl StdProxy_Vtbl;
  60
  61 #define ICOM_THIS_MULTI(impl,field,iface) impl* const This=(impl*)((char*)(iface) - offsetof(impl,field))
  62
  63 #if defined(__i386__)
  64
  65 #include "pshpack1.h"
  66
  67 struct thunk {
  68   BYTE push;
  69   DWORD index;
  70   BYTE jmp;
  71   LONG handler;
  72 };
  73
  74 #include "poppack.h"
  75
  76 extern void call_stubless_func(void);
  77 __ASM_GLOBAL_FUNC(call_stubless_func,
  78                   "pushl %esp\n\t"  /* pointer to index */
  79                   __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
  80                   "call " __ASM_NAME("ObjectStubless") __ASM_STDCALL(4) "\n\t"
  81                   "popl %edx\n\t"  /* args size */
  82                   __ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
  83                   "movl (%esp),%ecx\n\t"  /* return address */
  84                   "addl %edx,%esp\n\t"
  85                   "jmp *%ecx" );
  86
  87 HRESULT WINAPI ObjectStubless(DWORD *args)
  88 {
  89     DWORD index = args[0];
  90     void **iface = (void **)args[2];
  91     const void **vtbl = (const void **)*iface;
  92     const MIDL_STUBLESS_PROXY_INFO *stubless = *(const MIDL_STUBLESS_PROXY_INFO **)(vtbl - 2);
  93     const PFORMAT_STRING fs = stubless->ProcFormatString + stubless->FormatStringOffset[index];
  94
  95     /* store bytes to remove from stack */
  96     args[0] = *(const WORD*)(fs + 8);
  97     TRACE("(%p)->(%d)([%d bytes]) ret=%08x\n", iface, index, args[0], args[1]);
  98
  99     return NdrClientCall2(stubless->pStubDesc, fs, args + 2).Simple;
 100 }
 101
 102 #define BLOCK_SIZE 1024
 103 #define MAX_BLOCKS 64  /* 64k methods should be enough for anybody */
 104
 105 static const struct thunk *method_blocks[MAX_BLOCKS];
 106
 107 static const struct thunk *allocate_block( unsigned int num )
 108 {
 109     unsigned int i;
 110     struct thunk *prev, *block;
 111
 112     block = VirtualAlloc( NULL, BLOCK_SIZE * sizeof(*block),
 113                           MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE );
 114     if (!block) return NULL;
 115
 116     for (i = 0; i < BLOCK_SIZE; i++)
 117     {
 118         block[i].push    = 0x68; /* pushl */
 119         block[i].index   = BLOCK_SIZE * num + i + 3;
 120         block[i].jmp     = 0xe9; /* jmp */
 121         block[i].handler = (char *)call_stubless_func - (char *)(&block[i].handler + 1);
 122     }
 123     VirtualProtect( block, BLOCK_SIZE * sizeof(*block), PAGE_EXECUTE_READ, NULL );
 124     prev = InterlockedCompareExchangePointer( (void **)&method_blocks[num], block, NULL );
 125     if (prev) /* someone beat us to it */
 126     {
 127         VirtualFree( block, 0, MEM_RELEASE );
 128         block = prev;
 129     }
 130     return block;
 131 }
 132
 133 static BOOL fill_stubless_table( IUnknownVtbl *vtbl, DWORD num )
 134 {
 135     const void **entry = (const void **)(vtbl + 1);
 136     DWORD i, j;
 137
 138     if (num - 3 > BLOCK_SIZE * MAX_BLOCKS)
 139     {
 140         FIXME( "%u methods not supported\n", num );
 141         return FALSE;
 142     }
 143     for (i = 0; i < (num - 3 + BLOCK_SIZE - 1) / BLOCK_SIZE; i++)
 144     {
 145         const struct thunk *block = method_blocks[i];
 146         if (!block && !(block = allocate_block( i ))) return FALSE;
 147         for (j = 0; j < BLOCK_SIZE && j < num - 3 - i * BLOCK_SIZE; j++, entry++)
 148             if (*entry == (LPVOID)-1) *entry = &block[j];
 149     }
 150     return TRUE;
 151 }
 152
 153 #else  /* __i386__ */
 154
 155 static BOOL fill_stubless_table( IUnknownVtbl *vtbl, DWORD num )
 156 {
 157     ERR("stubless proxies are not supported on this architecture\n");
 158     return FALSE;
 159 }
 160
 161 #endif  /* __i386__ */
 162
 163 HRESULT StdProxy_Construct(REFIID riid,
 164                            LPUNKNOWN pUnkOuter,
 165                            const ProxyFileInfo *ProxyInfo,
 166                            int Index,
 167                            LPPSFACTORYBUFFER pPSFactory,
 168                            LPRPCPROXYBUFFER *ppProxy,
 169                            LPVOID *ppvObj)
 170 {
 171   StdProxyImpl *This;
 172   PCInterfaceName name = ProxyInfo->pNamesArray[Index];
 173   CInterfaceProxyVtbl *vtbl = ProxyInfo->pProxyVtblList[Index];
 174
 175   TRACE("(%p,%p,%p,%p,%p) %s\n", pUnkOuter, vtbl, pPSFactory, ppProxy, ppvObj, name);
 176
 177   /* TableVersion = 2 means it is the stubless version of CInterfaceProxyVtbl */
 178   if (ProxyInfo->TableVersion > 1) {
 179     ULONG count = ProxyInfo->pStubVtblList[Index]->header.DispatchTableCount;
 180     vtbl = (CInterfaceProxyVtbl *)((const void **)vtbl + 1);
 181     TRACE("stubless vtbl %p: count=%d\n", vtbl->Vtbl, count );
 182     fill_stubless_table( (IUnknownVtbl *)vtbl->Vtbl, count );
 183   }
 184
 185   if (!IsEqualGUID(vtbl->header.piid, riid)) {
 186     ERR("IID mismatch during proxy creation\n");
 187     return RPC_E_UNEXPECTED;
 188   }
 189
 190   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(StdProxyImpl));
 191   if (!This) return E_OUTOFMEMORY;
 192
 193   if (!pUnkOuter) pUnkOuter = (IUnknown *)This;
 194   This->lpVtbl = &StdProxy_Vtbl;
 195   This->PVtbl = vtbl->Vtbl;
 196   /* one reference for the proxy */
 197   This->RefCount = 1;
 198   This->piid = vtbl->header.piid;
 199   This->base_object = NULL;
 200   This->base_proxy = NULL;
 201   This->pUnkOuter = pUnkOuter;
 202   This->name = name;
 203   This->pPSFactory = pPSFactory;
 204   This->pChannel = NULL;
 205
 206   if(ProxyInfo->pDelegatedIIDs && ProxyInfo->pDelegatedIIDs[Index])
 207   {
 208       HRESULT r = create_proxy( ProxyInfo->pDelegatedIIDs[Index], NULL,
 209                                 &This->base_proxy, (void **)&This->base_object );
 210       if (FAILED(r))
 211       {
 212           HeapFree( GetProcessHeap(), 0, This );
 213           return r;
 214       }
 215   }
 216
 217   *ppProxy = (LPRPCPROXYBUFFER)&This->lpVtbl;
 218   *ppvObj = &This->PVtbl;
 219   IUnknown_AddRef((IUnknown *)*ppvObj);
 220   IPSFactoryBuffer_AddRef(pPSFactory);
 221
 222   TRACE( "iid=%s this %p proxy %p obj %p vtbl %p base proxy %p base obj %p\n",
 223          debugstr_guid(riid), This, *ppProxy, *ppvObj, This->PVtbl, This->base_proxy, This->base_object );
 224   return S_OK;
 225 }
 226
 227 static void StdProxy_Destruct(LPRPCPROXYBUFFER iface)
 228 {
 229   ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
 230
 231   if (This->pChannel)
 232     IRpcProxyBuffer_Disconnect(iface);
 233
 234   if (This->base_object) IUnknown_Release( This->base_object );
 235   if (This->base_proxy) IRpcProxyBuffer_Release( This->base_proxy );
 236
 237   IPSFactoryBuffer_Release(This->pPSFactory);
 238   HeapFree(GetProcessHeap(),0,This);
 239 }
 240
 241 static HRESULT WINAPI StdProxy_QueryInterface(LPRPCPROXYBUFFER iface,
 242                                              REFIID riid,
 243                                              LPVOID *obj)
 244 {
 245   ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
 246   TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
 247
 248   if (IsEqualGUID(&IID_IUnknown,riid) ||
 249       IsEqualGUID(This->piid,riid)) {
 250     *obj = &This->PVtbl;
 251     InterlockedIncrement(&This->RefCount);
 252     return S_OK;
 253   }
 254
 255   if (IsEqualGUID(&IID_IRpcProxyBuffer,riid)) {
 256     *obj = &This->lpVtbl;
 257     InterlockedIncrement(&This->RefCount);
 258     return S_OK;
 259   }
 260
 261   return E_NOINTERFACE;
 262 }
 263
 264 static ULONG WINAPI StdProxy_AddRef(LPRPCPROXYBUFFER iface)
 265 {
 266   ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
 267   TRACE("(%p)->AddRef()\n",This);
 268
 269   return InterlockedIncrement(&This->RefCount);
 270 }
 271
 272 static ULONG WINAPI StdProxy_Release(LPRPCPROXYBUFFER iface)
 273 {
 274   ULONG refs;
 275   ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
 276   TRACE("(%p)->Release()\n",This);
 277
 278   refs = InterlockedDecrement(&This->RefCount);
 279   if (!refs)
 280     StdProxy_Destruct((LPRPCPROXYBUFFER)&This->lpVtbl);
 281   return refs;
 282 }
 283
 284 static HRESULT WINAPI StdProxy_Connect(LPRPCPROXYBUFFER iface,
 285                                       LPRPCCHANNELBUFFER pChannel)
 286 {
 287   ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
 288   TRACE("(%p)->Connect(%p)\n",This,pChannel);
 289
 290   This->pChannel = pChannel;
 291   IRpcChannelBuffer_AddRef(pChannel);
 292   if (This->base_proxy) IRpcProxyBuffer_Connect( This->base_proxy, pChannel );
 293   return S_OK;
 294 }
 295
 296 static VOID WINAPI StdProxy_Disconnect(LPRPCPROXYBUFFER iface)
 297 {
 298   ICOM_THIS_MULTI(StdProxyImpl,lpVtbl,iface);
 299   TRACE("(%p)->Disconnect()\n",This);
 300
 301   if (This->base_proxy) IRpcProxyBuffer_Disconnect( This->base_proxy );
 302
 303   IRpcChannelBuffer_Release(This->pChannel);
 304   This->pChannel = NULL;
 305 }
 306
 307 static const IRpcProxyBufferVtbl StdProxy_Vtbl =
 308 {
 309   StdProxy_QueryInterface,
 310   StdProxy_AddRef,
 311   StdProxy_Release,
 312   StdProxy_Connect,
 313   StdProxy_Disconnect
 314 };
 315
 316 static void StdProxy_GetChannel(LPVOID iface,
 317                                    LPRPCCHANNELBUFFER *ppChannel)
 318 {
 319   ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
 320   TRACE("(%p)->GetChannel(%p) %s\n",This,ppChannel,This->name);
 321
 322   *ppChannel = This->pChannel;
 323 }
 324
 325 static void StdProxy_GetIID(LPVOID iface,
 326                                const IID **ppiid)
 327 {
 328   ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
 329   TRACE("(%p)->GetIID(%p) %s\n",This,ppiid,This->name);
 330
 331   *ppiid = This->piid;
 332 }
 333
 334 HRESULT WINAPI IUnknown_QueryInterface_Proxy(LPUNKNOWN iface,
 335                                             REFIID riid,
 336                                             LPVOID *ppvObj)
 337 {
 338   ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
 339   TRACE("(%p)->QueryInterface(%s,%p) %s\n",This,debugstr_guid(riid),ppvObj,This->name);
 340   return IUnknown_QueryInterface(This->pUnkOuter,riid,ppvObj);
 341 }
 342
 343 ULONG WINAPI IUnknown_AddRef_Proxy(LPUNKNOWN iface)
 344 {
 345   ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
 346   TRACE("(%p)->AddRef() %s\n",This,This->name);
 347   return IUnknown_AddRef(This->pUnkOuter);
 348 }
 349
 350 ULONG WINAPI IUnknown_Release_Proxy(LPUNKNOWN iface)
 351 {
 352   ICOM_THIS_MULTI(StdProxyImpl,PVtbl,iface);
 353   TRACE("(%p)->Release() %s\n",This,This->name);
 354   return IUnknown_Release(This->pUnkOuter);
 355 }
 356
 357 /***********************************************************************
 358  *           NdrProxyInitialize [RPCRT4.@]
 359  */
 360 void WINAPI NdrProxyInitialize(void *This,
 361                               PRPC_MESSAGE pRpcMsg,
 362                               PMIDL_STUB_MESSAGE pStubMsg,
 363                               PMIDL_STUB_DESC pStubDescriptor,
 364                               unsigned int ProcNum)
 365 {
 366   TRACE("(%p,%p,%p,%p,%d)\n", This, pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 367   NdrClientInitializeNew(pRpcMsg, pStubMsg, pStubDescriptor, ProcNum);
 368   StdProxy_GetChannel(This, &pStubMsg->pRpcChannelBuffer);
 369   IRpcChannelBuffer_GetDestCtx(pStubMsg->pRpcChannelBuffer,
 370                                &pStubMsg->dwDestContext,
 371                                &pStubMsg->pvDestContext);
 372   TRACE("channel=%p\n", pStubMsg->pRpcChannelBuffer);
 373 }
 374
 375 /***********************************************************************
 376  *           NdrProxyGetBuffer [RPCRT4.@]
 377  */
 378 void WINAPI NdrProxyGetBuffer(void *This,
 379                              PMIDL_STUB_MESSAGE pStubMsg)
 380 {
 381   HRESULT hr;
 382   const IID *riid = NULL;
 383
 384   TRACE("(%p,%p)\n", This, pStubMsg);
 385   pStubMsg->RpcMsg->BufferLength = pStubMsg->BufferLength;
 386   pStubMsg->dwStubPhase = PROXY_GETBUFFER;
 387   StdProxy_GetIID(This, &riid);
 388   hr = IRpcChannelBuffer_GetBuffer(pStubMsg->pRpcChannelBuffer,
 389                                   (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 390                                   riid);
 391   if (FAILED(hr))
 392   {
 393     RpcRaiseException(hr);
 394     return;
 395   }
 396   pStubMsg->fBufferValid = TRUE;
 397   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 398   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 399   pStubMsg->Buffer = pStubMsg->BufferStart;
 400   pStubMsg->dwStubPhase = PROXY_MARSHAL;
 401 }
 402
 403 /***********************************************************************
 404  *           NdrProxySendReceive [RPCRT4.@]
 405  */
 406 void WINAPI NdrProxySendReceive(void *This,
 407                                PMIDL_STUB_MESSAGE pStubMsg)
 408 {
 409   ULONG Status = 0;
 410   HRESULT hr;
 411
 412   TRACE("(%p,%p)\n", This, pStubMsg);
 413
 414   if (!pStubMsg->pRpcChannelBuffer)
 415   {
 416     WARN("Trying to use disconnected proxy %p\n", This);
 417     RpcRaiseException(RPC_E_DISCONNECTED);
 418   }
 419
 420   pStubMsg->dwStubPhase = PROXY_SENDRECEIVE;
 421   /* avoid sending uninitialised parts of the buffer on the wire */
 422   pStubMsg->RpcMsg->BufferLength = pStubMsg->Buffer - (unsigned char *)pStubMsg->RpcMsg->Buffer;
 423   hr = IRpcChannelBuffer_SendReceive(pStubMsg->pRpcChannelBuffer,
 424                                     (RPCOLEMESSAGE*)pStubMsg->RpcMsg,
 425                                     &Status);
 426   pStubMsg->dwStubPhase = PROXY_UNMARSHAL;
 427   pStubMsg->BufferLength = pStubMsg->RpcMsg->BufferLength;
 428   pStubMsg->BufferStart = pStubMsg->RpcMsg->Buffer;
 429   pStubMsg->BufferEnd = pStubMsg->BufferStart + pStubMsg->BufferLength;
 430   pStubMsg->Buffer = pStubMsg->BufferStart;
 431
 432   /* raise exception if call failed */
 433   if (hr == RPC_S_CALL_FAILED) RpcRaiseException(*(DWORD*)pStubMsg->Buffer);
 434   else if (FAILED(hr)) RpcRaiseException(hr);
 435 }
 436
 437 /***********************************************************************
 438  *           NdrProxyFreeBuffer [RPCRT4.@]
 439  */
 440 void WINAPI NdrProxyFreeBuffer(void *This,
 441                               PMIDL_STUB_MESSAGE pStubMsg)
 442 {
 443   TRACE("(%p,%p)\n", This, pStubMsg);
 444
 445   if (pStubMsg->fBufferValid)
 446   {
 447     IRpcChannelBuffer_FreeBuffer(pStubMsg->pRpcChannelBuffer,
 448                                  (RPCOLEMESSAGE*)pStubMsg->RpcMsg);
 449     pStubMsg->fBufferValid = TRUE;
 450   }
 451 }
 452
 453 /***********************************************************************
 454  *           NdrProxyErrorHandler [RPCRT4.@]
 455  */
 456 HRESULT WINAPI NdrProxyErrorHandler(DWORD dwExceptionCode)
 457 {
 458   WARN("(0x%08x): a proxy call failed\n", dwExceptionCode);
 459
 460   if (FAILED(dwExceptionCode))
 461     return dwExceptionCode;
 462   else
 463     return HRESULT_FROM_WIN32(dwExceptionCode);
 464 }
 465
 466 HRESULT WINAPI
 467 CreateProxyFromTypeInfo( LPTYPEINFO pTypeInfo, LPUNKNOWN pUnkOuter, REFIID riid,
 468                          LPRPCPROXYBUFFER *ppProxy, LPVOID *ppv )
 469 {
 470     typedef INT (WINAPI *MessageBoxA)(HWND,LPCSTR,LPCSTR,UINT);
 471     HMODULE hUser32 = LoadLibraryA("user32");
 472     MessageBoxA pMessageBoxA = (void *)GetProcAddress(hUser32, "MessageBoxA");
 473
 474     FIXME("%p %p %s %p %p\n", pTypeInfo, pUnkOuter, debugstr_guid(riid), ppProxy, ppv);
 475     if (pMessageBoxA)
 476     {
 477         pMessageBoxA(NULL,
 478             "The native implementation of OLEAUT32.DLL cannot be used "
 479             "with Wine's RPCRT4.DLL. Remove OLEAUT32.DLL and try again.\n",
 480             "Wine: Unimplemented CreateProxyFromTypeInfo",
 481             0x10);
 482         ExitProcess(1);
 483     }
 484     return E_NOTIMPL;
 485 }