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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * TODO:
  21  *  - figure out whether we *really* got this right
  22  *  - check for errors and throw exceptions
  23  *  - what are the marshalling functions supposed to return?
  24  *  - finish RpcStream_Vtbl
  25  */
  26
  27 #include <stdarg.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30
  31 #define COBJMACROS
  32 #define NONAMELESSUNION
  33 #define NONAMELESSSTRUCT
  34
  35 #include "windef.h"
  36 #include "winbase.h"
  37 #include "winerror.h"
  38 #include "winreg.h"
  39
  40 #include "objbase.h"
  41
  42 #include "ndr_misc.h"
  43 #include "rpcndr.h"
  44 #include "wine/rpcfc.h"
  45
  46 #include "wine/debug.h"
  47
  48 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  49
  50 static HMODULE hOLE;
  51
  52 static HRESULT (WINAPI *COM_GetMarshalSizeMax)(ULONG *,REFIID,LPUNKNOWN,DWORD,LPVOID,DWORD);
  53 static HRESULT (WINAPI *COM_MarshalInterface)(LPSTREAM,REFIID,LPUNKNOWN,DWORD,LPVOID,DWORD);
  54 static HRESULT (WINAPI *COM_UnmarshalInterface)(LPSTREAM,REFIID,LPVOID*);
  55 static HRESULT (WINAPI *COM_ReleaseMarshalData)(LPSTREAM);
  56 static HRESULT (WINAPI *COM_GetClassObject)(REFCLSID,DWORD,COSERVERINFO *,REFIID,LPVOID *);
  57 static HRESULT (WINAPI *COM_GetPSClsid)(REFIID,CLSID *);
  58 static LPVOID (WINAPI *COM_MemAlloc)(ULONG);
  59 static void (WINAPI *COM_MemFree)(LPVOID);
  60
  61 static HMODULE LoadCOM(void)
  62 {
  63   if (hOLE) return hOLE;
  64   hOLE = LoadLibraryA("OLE32.DLL");
  65   if (!hOLE) return 0;
  66   COM_GetMarshalSizeMax  = (LPVOID)GetProcAddress(hOLE, "CoGetMarshalSizeMax");
  67   COM_MarshalInterface   = (LPVOID)GetProcAddress(hOLE, "CoMarshalInterface");
  68   COM_UnmarshalInterface = (LPVOID)GetProcAddress(hOLE, "CoUnmarshalInterface");
  69   COM_ReleaseMarshalData = (LPVOID)GetProcAddress(hOLE, "CoReleaseMarshalData");
  70   COM_GetClassObject     = (LPVOID)GetProcAddress(hOLE, "CoGetClassObject");
  71   COM_GetPSClsid         = (LPVOID)GetProcAddress(hOLE, "CoGetPSClsid");
  72   COM_MemAlloc = (LPVOID)GetProcAddress(hOLE, "CoTaskMemAlloc");
  73   COM_MemFree  = (LPVOID)GetProcAddress(hOLE, "CoTaskMemFree");
  74   return hOLE;
  75 }
  76
  77 /* CoMarshalInterface/CoUnmarshalInterface works on streams,
  78  * so implement a simple stream on top of the RPC buffer
  79  * (which also implements the MInterfacePointer structure) */
  80 typedef struct RpcStreamImpl
  81 {
  82   const IStreamVtbl *lpVtbl;
  83   DWORD RefCount;
  84   PMIDL_STUB_MESSAGE pMsg;
  85   LPDWORD size;
  86   char *data;
  87   DWORD pos;
  88 } RpcStreamImpl;
  89
  90 static HRESULT WINAPI RpcStream_QueryInterface(LPSTREAM iface,
  91                                               REFIID riid,
  92                                               LPVOID *obj)
  93 {
  94   RpcStreamImpl *This = (RpcStreamImpl *)iface;
  95   if (IsEqualGUID(&IID_IUnknown, riid) ||
  96       IsEqualGUID(&IID_ISequentialStream, riid) ||
  97       IsEqualGUID(&IID_IStream, riid)) {
  98     *obj = This;
  99     This->RefCount++;
 100     return S_OK;
 101   }
 102   return E_NOINTERFACE;
 103 }
 104
 105 static ULONG WINAPI RpcStream_AddRef(LPSTREAM iface)
 106 {
 107   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 108   return ++(This->RefCount);
 109 }
 110
 111 static ULONG WINAPI RpcStream_Release(LPSTREAM iface)
 112 {
 113   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 114   if (!--(This->RefCount)) {
 115     TRACE("size=%ld\n", *This->size);
 116     This->pMsg->Buffer = (unsigned char*)This->data + *This->size;
 117     HeapFree(GetProcessHeap(),0,This);
 118     return 0;
 119   }
 120   return This->RefCount;
 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 > (char *)This->pMsg->BufferEnd)
 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 = (char*)(This->size + 1);
 220   This->pos = 0;
 221   if (init) *This->size = 0;
 222   TRACE("init size=%ld\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       hr = COM_MarshalInterface(stream, riid, (LPUNKNOWN)pMemory,
 261                                 pStubMsg->dwDestContext, pStubMsg->pvDestContext,
 262                                 MSHLFLAGS_NORMAL);
 263       IStream_Release(stream);
 264       if (FAILED(hr))
 265         RpcRaiseException(hr);
 266     }
 267   }
 268   return NULL;
 269 }
 270
 271 /***********************************************************************
 272  *           NdrInterfacePointerUnmarshall [RPCRT4.@]
 273  */
 274 unsigned char * WINAPI NdrInterfacePointerUnmarshall(PMIDL_STUB_MESSAGE pStubMsg,
 275                                                     unsigned char **ppMemory,
 276                                                     PFORMAT_STRING pFormat,
 277                                                     unsigned char fMustAlloc)
 278 {
 279   LPSTREAM stream;
 280   HRESULT hr;
 281
 282   TRACE("(%p,%p,%p,%d)\n", pStubMsg, ppMemory, pFormat, fMustAlloc);
 283   if (!LoadCOM()) return NULL;
 284   *(LPVOID*)ppMemory = NULL;
 285   if (pStubMsg->Buffer + sizeof(DWORD) < (unsigned char *)pStubMsg->RpcMsg->Buffer + pStubMsg->BufferLength) {
 286     stream = RpcStream_Create(pStubMsg, FALSE);
 287     if (stream) {
 288       hr = COM_UnmarshalInterface(stream, &IID_NULL, (LPVOID*)ppMemory);
 289       IStream_Release(stream);
 290       if (FAILED(hr))
 291         RpcRaiseException(hr);
 292     }
 293   }
 294   return NULL;
 295 }
 296
 297 /***********************************************************************
 298  *           NdrInterfacePointerBufferSize [RPCRT4.@]
 299  */
 300 void WINAPI NdrInterfacePointerBufferSize(PMIDL_STUB_MESSAGE pStubMsg,
 301                                          unsigned char *pMemory,
 302                                          PFORMAT_STRING pFormat)
 303 {
 304   const IID *riid = get_ip_iid(pStubMsg, pMemory, pFormat);
 305   ULONG size = 0;
 306   HRESULT hr;
 307
 308   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 309   if (!LoadCOM()) return;
 310   hr = COM_GetMarshalSizeMax(&size, riid, (LPUNKNOWN)pMemory,
 311                             pStubMsg->dwDestContext, pStubMsg->pvDestContext,
 312                             MSHLFLAGS_NORMAL);
 313   TRACE("size=%ld\n", size);
 314   pStubMsg->BufferLength += sizeof(DWORD) + size;
 315 }
 316
 317 /***********************************************************************
 318  *           NdrInterfacePointerMemorySize [RPCRT4.@]
 319  */
 320 unsigned long WINAPI NdrInterfacePointerMemorySize(PMIDL_STUB_MESSAGE pStubMsg,
 321                                                   PFORMAT_STRING pFormat)
 322 {
 323   FIXME("(%p,%p): stub\n", pStubMsg, pFormat);
 324   return 0;
 325 }
 326
 327 /***********************************************************************
 328  *           NdrInterfacePointerFree [RPCRT4.@]
 329  */
 330 void WINAPI NdrInterfacePointerFree(PMIDL_STUB_MESSAGE pStubMsg,
 331                                    unsigned char *pMemory,
 332                                    PFORMAT_STRING pFormat)
 333 {
 334   LPUNKNOWN pUnk = (LPUNKNOWN)pMemory;
 335   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 336   if (pUnk) IUnknown_Release(pUnk);
 337 }
 338
 339 /***********************************************************************
 340  *           NdrOleAllocate [RPCRT4.@]
 341  */
 342 void * WINAPI NdrOleAllocate(size_t Size)
 343 {
 344   if (!LoadCOM()) return NULL;
 345   return COM_MemAlloc(Size);
 346 }
 347
 348 /***********************************************************************
 349  *           NdrOleFree [RPCRT4.@]
 350  */
 351 void WINAPI NdrOleFree(void *NodeToFree)
 352 {
 353   if (!LoadCOM()) return;
 354   COM_MemFree(NodeToFree);
 355 }