dlls/rpcrt4/ndr_ole.c

   1 /*
   2  * OLE32 callouts, COM interface marshalling
   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  * TODO:
  21  *  - fix the wire-protocol to match MS/RPC
  22  *  - finish RpcStream_Vtbl
  23  */
  24
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28
  29 #define COBJMACROS
  30 #define NONAMELESSUNION
  31 #define NONAMELESSSTRUCT
  32
  33 #include "windef.h"
  34 #include "winbase.h"
  35 #include "winerror.h"
  36
  37 #include "objbase.h"
  38
  39 #include "ndr_misc.h"
  40 #include "rpcndr.h"
  41 #include "rpcproxy.h"
  42 #include "wine/rpcfc.h"
  43 #include "cpsf.h"
  44
  45 #include "wine/debug.h"
  46
  47 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  48
  49 static HMODULE hOLE;
  50
  51 static HRESULT (WINAPI *COM_GetMarshalSizeMax)(ULONG *,REFIID,LPUNKNOWN,DWORD,LPVOID,DWORD);
  52 static HRESULT (WINAPI *COM_MarshalInterface)(LPSTREAM,REFIID,LPUNKNOWN,DWORD,LPVOID,DWORD);
  53 static HRESULT (WINAPI *COM_UnmarshalInterface)(LPSTREAM,REFIID,LPVOID*);
  54 static HRESULT (WINAPI *COM_ReleaseMarshalData)(LPSTREAM);
  55 static HRESULT (WINAPI *COM_GetClassObject)(REFCLSID,DWORD,COSERVERINFO *,REFIID,LPVOID *);
  56 static HRESULT (WINAPI *COM_GetPSClsid)(REFIID,CLSID *);
  57 static LPVOID (WINAPI *COM_MemAlloc)(ULONG);
  58 static void (WINAPI *COM_MemFree)(LPVOID);
  59
  60 static HMODULE LoadCOM(void)
  61 {
  62   if (hOLE) return hOLE;
  63   hOLE = LoadLibraryA("OLE32.DLL");
  64   if (!hOLE) return 0;
  65   COM_GetMarshalSizeMax  = (LPVOID)GetProcAddress(hOLE, "CoGetMarshalSizeMax");
  66   COM_MarshalInterface   = (LPVOID)GetProcAddress(hOLE, "CoMarshalInterface");
  67   COM_UnmarshalInterface = (LPVOID)GetProcAddress(hOLE, "CoUnmarshalInterface");
  68   COM_ReleaseMarshalData = (LPVOID)GetProcAddress(hOLE, "CoReleaseMarshalData");
  69   COM_GetClassObject     = (LPVOID)GetProcAddress(hOLE, "CoGetClassObject");
  70   COM_GetPSClsid         = (LPVOID)GetProcAddress(hOLE, "CoGetPSClsid");
  71   COM_MemAlloc = (LPVOID)GetProcAddress(hOLE, "CoTaskMemAlloc");
  72   COM_MemFree  = (LPVOID)GetProcAddress(hOLE, "CoTaskMemFree");
  73   return hOLE;
  74 }
  75
  76 /* CoMarshalInterface/CoUnmarshalInterface works on streams,
  77  * so implement a simple stream on top of the RPC buffer
  78  * (which also implements the MInterfacePointer structure) */
  79 typedef struct RpcStreamImpl
  80 {
  81   const IStreamVtbl *lpVtbl;
  82   LONG RefCount;
  83   PMIDL_STUB_MESSAGE pMsg;
  84   LPDWORD size;
  85   unsigned char *data;
  86   DWORD pos;
  87 } RpcStreamImpl;
  88
  89 static HRESULT WINAPI RpcStream_QueryInterface(LPSTREAM iface,
  90                                               REFIID riid,
  91                                               LPVOID *obj)
  92 {
  93   RpcStreamImpl *This = (RpcStreamImpl *)iface;
  94   if (IsEqualGUID(&IID_IUnknown, riid) ||
  95       IsEqualGUID(&IID_ISequentialStream, riid) ||
  96       IsEqualGUID(&IID_IStream, riid)) {
  97     *obj = This;
  98     InterlockedIncrement( &This->RefCount );
  99     return S_OK;
 100   }
 101   return E_NOINTERFACE;
 102 }
 103
 104 static ULONG WINAPI RpcStream_AddRef(LPSTREAM iface)
 105 {
 106   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 107   return InterlockedIncrement( &This->RefCount );
 108 }
 109
 110 static ULONG WINAPI RpcStream_Release(LPSTREAM iface)
 111 {
 112   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 113   ULONG ref = InterlockedDecrement( &This->RefCount );
 114   if (!ref) {
 115     TRACE("size=%d\n", *This->size);
 116     This->pMsg->Buffer = This->data + *This->size;
 117     HeapFree(GetProcessHeap(),0,This);
 118     return 0;
 119   }
 120   return ref;
 121 }
 122
 123 static HRESULT WINAPI RpcStream_Read(LPSTREAM iface,
 124                                     void *pv,
 125                                     ULONG cb,
 126                                     ULONG *pcbRead)
 127 {
 128   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 129   HRESULT hr = S_OK;
 130   if (This->pos + cb > *This->size)
 131   {
 132     cb = *This->size - This->pos;
 133     hr = S_FALSE;
 134   }
 135   if (cb) {
 136     memcpy(pv, This->data + This->pos, cb);
 137     This->pos += cb;
 138   }
 139   if (pcbRead) *pcbRead = cb;
 140   return hr;
 141 }
 142
 143 static HRESULT WINAPI RpcStream_Write(LPSTREAM iface,
 144                                      const void *pv,
 145                                      ULONG cb,
 146                                      ULONG *pcbWritten)
 147 {
 148   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 149   if (This->data + cb > (unsigned char *)This->pMsg->RpcMsg->Buffer + This->pMsg->BufferLength)
 150     return STG_E_MEDIUMFULL;
 151   memcpy(This->data + This->pos, pv, cb);
 152   This->pos += cb;
 153   if (This->pos > *This->size) *This->size = This->pos;
 154   if (pcbWritten) *pcbWritten = cb;
 155   return S_OK;
 156 }
 157
 158 static HRESULT WINAPI RpcStream_Seek(LPSTREAM iface,
 159                                     LARGE_INTEGER move,
 160                                     DWORD origin,
 161                                     ULARGE_INTEGER *newPos)
 162 {
 163   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 164   switch (origin) {
 165   case STREAM_SEEK_SET:
 166     This->pos = move.u.LowPart;
 167     break;
 168   case STREAM_SEEK_CUR:
 169     This->pos = This->pos + move.u.LowPart;
 170     break;
 171   case STREAM_SEEK_END:
 172     This->pos = *This->size + move.u.LowPart;
 173     break;
 174   default:
 175     return STG_E_INVALIDFUNCTION;
 176   }
 177   if (newPos) {
 178     newPos->u.LowPart = This->pos;
 179     newPos->u.HighPart = 0;
 180   }
 181   return S_OK;
 182 }
 183
 184 static HRESULT WINAPI RpcStream_SetSize(LPSTREAM iface,
 185                                        ULARGE_INTEGER newSize)
 186 {
 187   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 188   *This->size = newSize.u.LowPart;
 189   return S_OK;
 190 }
 191
 192 static const IStreamVtbl RpcStream_Vtbl =
 193 {
 194   RpcStream_QueryInterface,
 195   RpcStream_AddRef,
 196   RpcStream_Release,
 197   RpcStream_Read,
 198   RpcStream_Write,
 199   RpcStream_Seek,
 200   RpcStream_SetSize,
 201   NULL, /* CopyTo */
 202   NULL, /* Commit */
 203   NULL, /* Revert */
 204   NULL, /* LockRegion */
 205   NULL, /* UnlockRegion */
 206   NULL, /* Stat */
 207   NULL  /* Clone */
 208 };
 209
 210 static LPSTREAM RpcStream_Create(PMIDL_STUB_MESSAGE pStubMsg, BOOL init)
 211 {
 212   RpcStreamImpl *This;
 213   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(RpcStreamImpl));
 214   if (!This) return NULL;
 215   This->lpVtbl = &RpcStream_Vtbl;
 216   This->RefCount = 1;
 217   This->pMsg = pStubMsg;
 218   This->size = (LPDWORD)pStubMsg->Buffer;
 219   This->data = (unsigned char*)(This->size + 1);
 220   This->pos = 0;
 221   if (init) *This->size = 0;
 222   TRACE("init size=%d\n", *This->size);
 223   return (LPSTREAM)This;
 224 }
 225
 226 static const IID* get_ip_iid(PMIDL_STUB_MESSAGE pStubMsg, unsigned char *pMemory, PFORMAT_STRING pFormat)
 227 {
 228   const IID *riid;
 229   if (!pFormat) return &IID_IUnknown;
 230   TRACE("format=%02x %02x\n", pFormat[0], pFormat[1]);
 231   if (pFormat[0] != RPC_FC_IP) FIXME("format=%d\n", pFormat[0]);
 232   if (pFormat[1] == RPC_FC_CONSTANT_IID) {
 233     riid = (const IID *)&pFormat[2];
 234   } else {
 235     ComputeConformance(pStubMsg, pMemory, pFormat+2, 0);
 236     riid = (const IID *)pStubMsg->MaxCount;
 237   }
 238   if (!riid) riid = &IID_IUnknown;
 239   TRACE("got %s\n", debugstr_guid(riid));
 240   return riid;
 241 }
 242
 243 /***********************************************************************
 244  *           NdrInterfacePointerMarshall [RPCRT4.@]
 245  */
 246 unsigned char * WINAPI NdrInterfacePointerMarshall(PMIDL_STUB_MESSAGE pStubMsg,
 247                                                   unsigned char *pMemory,
 248                                                   PFORMAT_STRING pFormat)
 249 {
 250   const IID *riid = get_ip_iid(pStubMsg, pMemory, pFormat);
 251   LPSTREAM stream;
 252   HRESULT hr;
 253
 254   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 255   pStubMsg->MaxCount = 0;
 256   if (!LoadCOM()) return NULL;
 257   if (pStubMsg->Buffer + sizeof(DWORD) <= (unsigned char *)pStubMsg->RpcMsg->Buffer + pStubMsg->BufferLength) {
 258     stream = RpcStream_Create(pStubMsg, TRUE);
 259     if (stream) {
 260       if (pMemory)
 261         hr = COM_MarshalInterface(stream, riid, (LPUNKNOWN)pMemory,
 262                                   pStubMsg->dwDestContext, pStubMsg->pvDestContext,
 263                                   MSHLFLAGS_NORMAL);
 264       else
 265         hr = S_OK;
 266
 267       IStream_Release(stream);
 268       if (FAILED(hr))
 269         RpcRaiseException(hr);
 270     }
 271   }
 272   return NULL;
 273 }
 274
 275 /***********************************************************************
 276  *           NdrInterfacePointerUnmarshall [RPCRT4.@]
 277  */
 278 unsigned char * WINAPI NdrInterfacePointerUnmarshall(PMIDL_STUB_MESSAGE pStubMsg,
 279                                                     unsigned char **ppMemory,
 280                                                     PFORMAT_STRING pFormat,
 281                                                     unsigned char fMustAlloc)
 282 {
 283   LPSTREAM stream;
 284   HRESULT hr;
 285
 286   TRACE("(%p,%p,%p,%d)\n", pStubMsg, ppMemory, pFormat, fMustAlloc);
 287   if (!LoadCOM()) return NULL;
 288   *(LPVOID*)ppMemory = NULL;
 289   if (pStubMsg->Buffer + sizeof(DWORD) < (unsigned char *)pStubMsg->RpcMsg->Buffer + pStubMsg->BufferLength) {
 290     stream = RpcStream_Create(pStubMsg, FALSE);
 291     if (!stream) RpcRaiseException(E_OUTOFMEMORY);
 292     if (*((RpcStreamImpl *)stream)->size != 0)
 293       hr = COM_UnmarshalInterface(stream, &IID_NULL, (LPVOID*)ppMemory);
 294     else
 295       hr = S_OK;
 296     IStream_Release(stream);
 297     if (FAILED(hr))
 298         RpcRaiseException(hr);
 299   }
 300   return NULL;
 301 }
 302
 303 /***********************************************************************
 304  *           NdrInterfacePointerBufferSize [RPCRT4.@]
 305  */
 306 void WINAPI NdrInterfacePointerBufferSize(PMIDL_STUB_MESSAGE pStubMsg,
 307                                          unsigned char *pMemory,
 308                                          PFORMAT_STRING pFormat)
 309 {
 310   const IID *riid = get_ip_iid(pStubMsg, pMemory, pFormat);
 311   ULONG size = 0;
 312   HRESULT hr;
 313
 314   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 315   if (!LoadCOM()) return;
 316   hr = COM_GetMarshalSizeMax(&size, riid, (LPUNKNOWN)pMemory,
 317                             pStubMsg->dwDestContext, pStubMsg->pvDestContext,
 318                             MSHLFLAGS_NORMAL);
 319   TRACE("size=%d\n", size);
 320   pStubMsg->BufferLength += sizeof(DWORD) + size;
 321 }
 322
 323 /***********************************************************************
 324  *           NdrInterfacePointerMemorySize [RPCRT4.@]
 325  */
 326 ULONG WINAPI NdrInterfacePointerMemorySize(PMIDL_STUB_MESSAGE pStubMsg,
 327                                            PFORMAT_STRING pFormat)
 328 {
 329   ULONG size;
 330
 331   TRACE("(%p,%p)\n", pStubMsg, pFormat);
 332
 333   size = *(ULONG *)pStubMsg->Buffer;
 334   pStubMsg->Buffer += 4;
 335   pStubMsg->MemorySize += 4;
 336
 337   pStubMsg->Buffer += size;
 338
 339   return pStubMsg->MemorySize;
 340 }
 341
 342 /***********************************************************************
 343  *           NdrInterfacePointerFree [RPCRT4.@]
 344  */
 345 void WINAPI NdrInterfacePointerFree(PMIDL_STUB_MESSAGE pStubMsg,
 346                                    unsigned char *pMemory,
 347                                    PFORMAT_STRING pFormat)
 348 {
 349   LPUNKNOWN pUnk = (LPUNKNOWN)pMemory;
 350   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 351   if (pUnk) IUnknown_Release(pUnk);
 352 }
 353
 354 /***********************************************************************
 355  *           NdrOleAllocate [RPCRT4.@]
 356  */
 357 void * WINAPI NdrOleAllocate(size_t Size)
 358 {
 359   if (!LoadCOM()) return NULL;
 360   return COM_MemAlloc(Size);
 361 }
 362
 363 /***********************************************************************
 364  *           NdrOleFree [RPCRT4.@]
 365  */
 366 void WINAPI NdrOleFree(void *NodeToFree)
 367 {
 368   if (!LoadCOM()) return;
 369   COM_MemFree(NodeToFree);
 370 }
 371
 372 /***********************************************************************
 373  * Helper function to create a stub.
 374  * This probably looks very much like NdrpCreateStub.
 375  */
 376 HRESULT create_stub(REFIID iid, IUnknown *pUnk, IRpcStubBuffer **ppstub)
 377 {
 378     CLSID clsid;
 379     IPSFactoryBuffer *psfac;
 380     HRESULT r;
 381
 382     if(!LoadCOM()) return E_FAIL;
 383
 384     r = COM_GetPSClsid( iid, &clsid );
 385     if(FAILED(r)) return r;
 386
 387     r = COM_GetClassObject( &clsid, CLSCTX_INPROC_SERVER, NULL, &IID_IPSFactoryBuffer, (void**)&psfac );
 388     if(FAILED(r)) return r;
 389
 390     r = IPSFactoryBuffer_CreateStub(psfac, iid, pUnk, ppstub);
 391
 392     IPSFactoryBuffer_Release(psfac);
 393     return r;
 394 }