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 NONAMELESSUNION
  32 #define NONAMELESSSTRUCT
  33 #include "windef.h"
  34 #include "winbase.h"
  35 #include "winerror.h"
  36 #include "winreg.h"
  37
  38 #include "objbase.h"
  39
  40 #include "ndr_misc.h"
  41 #include "rpcndr.h"
  42 #include "wine/rpcfc.h"
  43
  44 #include "wine/debug.h"
  45
  46 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  47
  48 static HMODULE hOLE;
  49
  50 static HRESULT (WINAPI *COM_GetMarshalSizeMax)(ULONG *,REFIID,LPUNKNOWN,DWORD,LPVOID,DWORD);
  51 static HRESULT (WINAPI *COM_MarshalInterface)(LPSTREAM,REFIID,LPUNKNOWN,DWORD,LPVOID,DWORD);
  52 static HRESULT (WINAPI *COM_UnmarshalInterface)(LPSTREAM,REFIID,LPVOID*);
  53 static HRESULT (WINAPI *COM_ReleaseMarshalData)(LPSTREAM);
  54 static HRESULT (WINAPI *COM_GetClassObject)(REFCLSID,DWORD,COSERVERINFO *,REFIID,LPVOID *);
  55 static HRESULT (WINAPI *COM_GetPSClsid)(REFIID,CLSID *);
  56 static LPVOID (WINAPI *COM_MemAlloc)(ULONG);
  57 static void (WINAPI *COM_MemFree)(LPVOID);
  58
  59 static HMODULE LoadCOM(void)
  60 {
  61   if (hOLE) return hOLE;
  62   hOLE = LoadLibraryA("OLE32.DLL");
  63   if (!hOLE) return 0;
  64   COM_GetMarshalSizeMax  = (LPVOID)GetProcAddress(hOLE, "CoGetMarshalSizeMax");
  65   COM_MarshalInterface   = (LPVOID)GetProcAddress(hOLE, "CoMarshalInterface");
  66   COM_UnmarshalInterface = (LPVOID)GetProcAddress(hOLE, "CoUnmarshalInterface");
  67   COM_ReleaseMarshalData = (LPVOID)GetProcAddress(hOLE, "CoReleaseMarshalData");
  68   COM_GetClassObject     = (LPVOID)GetProcAddress(hOLE, "CoGetClassObject");
  69   COM_GetPSClsid         = (LPVOID)GetProcAddress(hOLE, "CoGetPSClsid");
  70   COM_MemAlloc = (LPVOID)GetProcAddress(hOLE, "CoTaskMemAlloc");
  71   COM_MemFree  = (LPVOID)GetProcAddress(hOLE, "CoTaskMemFree");
  72   return hOLE;
  73 }
  74
  75 /* CoMarshalInterface/CoUnmarshalInterface works on streams,
  76  * so implement a simple stream on top of the RPC buffer
  77  * (which also implements the MInterfacePointer structure) */
  78 typedef struct RpcStreamImpl
  79 {
  80   IStreamVtbl *lpVtbl;
  81   DWORD RefCount;
  82   PMIDL_STUB_MESSAGE pMsg;
  83   LPDWORD size;
  84   char *data;
  85   DWORD pos;
  86 } RpcStreamImpl;
  87
  88 static HRESULT WINAPI RpcStream_QueryInterface(LPSTREAM iface,
  89                                               REFIID riid,
  90                                               LPVOID *obj)
  91 {
  92   RpcStreamImpl *This = (RpcStreamImpl *)iface;
  93   if (IsEqualGUID(&IID_IUnknown, riid) ||
  94       IsEqualGUID(&IID_ISequentialStream, riid) ||
  95       IsEqualGUID(&IID_IStream, riid)) {
  96     *obj = This;
  97     This->RefCount++;
  98     return S_OK;
  99   }
 100   return E_NOINTERFACE;
 101 }
 102
 103 static ULONG WINAPI RpcStream_AddRef(LPSTREAM iface)
 104 {
 105   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 106   return ++(This->RefCount);
 107 }
 108
 109 static ULONG WINAPI RpcStream_Release(LPSTREAM iface)
 110 {
 111   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 112   if (!--(This->RefCount)) {
 113     TRACE("size=%ld\n", *This->size);
 114     This->pMsg->Buffer = This->data + *This->size;
 115     HeapFree(GetProcessHeap(),0,This);
 116     return 0;
 117   }
 118   return This->RefCount;
 119 }
 120
 121 static HRESULT WINAPI RpcStream_Read(LPSTREAM iface,
 122                                     void *pv,
 123                                     ULONG cb,
 124                                     ULONG *pcbRead)
 125 {
 126   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 127   if (This->pos + cb > *This->size) cb = *This->size - This->pos;
 128   if (cb) {
 129     memcpy(pv, This->data + This->pos, cb);
 130     This->pos += cb;
 131   }
 132   if (pcbRead) *pcbRead = cb;
 133   return S_OK;
 134 }
 135
 136 static HRESULT WINAPI RpcStream_Write(LPSTREAM iface,
 137                                      const void *pv,
 138                                      ULONG cb,
 139                                      ULONG *pcbWritten)
 140 {
 141   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 142   memcpy(This->data + This->pos, pv, cb);
 143   This->pos += cb;
 144   if (This->pos > *This->size) *This->size = This->pos;
 145   if (pcbWritten) *pcbWritten = cb;
 146   return S_OK;
 147 }
 148
 149 static HRESULT WINAPI RpcStream_Seek(LPSTREAM iface,
 150                                     LARGE_INTEGER move,
 151                                     DWORD origin,
 152                                     ULARGE_INTEGER *newPos)
 153 {
 154   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 155   switch (origin) {
 156   case STREAM_SEEK_SET:
 157     This->pos = move.u.LowPart;
 158     break;
 159   case STREAM_SEEK_CUR:
 160     This->pos = This->pos + move.u.LowPart;
 161     break;
 162   case STREAM_SEEK_END:
 163     This->pos = *This->size + move.u.LowPart;
 164     break;
 165   default:
 166     return STG_E_INVALIDFUNCTION;
 167   }
 168   if (newPos) {
 169     newPos->u.LowPart = This->pos;
 170     newPos->u.HighPart = 0;
 171   }
 172   return S_OK;
 173 }
 174
 175 static HRESULT WINAPI RpcStream_SetSize(LPSTREAM iface,
 176                                        ULARGE_INTEGER newSize)
 177 {
 178   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 179   *This->size = newSize.u.LowPart;
 180   return S_OK;
 181 }
 182
 183 static IStreamVtbl RpcStream_Vtbl =
 184 {
 185   RpcStream_QueryInterface,
 186   RpcStream_AddRef,
 187   RpcStream_Release,
 188   RpcStream_Read,
 189   RpcStream_Write,
 190   RpcStream_Seek,
 191   RpcStream_SetSize,
 192   NULL, /* CopyTo */
 193   NULL, /* Commit */
 194   NULL, /* Revert */
 195   NULL, /* LockRegion */
 196   NULL, /* UnlockRegion */
 197   NULL, /* Stat */
 198   NULL  /* Clone */
 199 };
 200
 201 static LPSTREAM RpcStream_Create(PMIDL_STUB_MESSAGE pStubMsg, BOOL init)
 202 {
 203   RpcStreamImpl *This;
 204   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(RpcStreamImpl));
 205   if (!This) return NULL;
 206   This->lpVtbl = &RpcStream_Vtbl;
 207   This->RefCount = 1;
 208   This->pMsg = pStubMsg;
 209   This->size = (LPDWORD)pStubMsg->Buffer;
 210   This->data = (char*)(This->size + 1);
 211   This->pos = 0;
 212   if (init) *This->size = 0;
 213   TRACE("init size=%ld\n", *This->size);
 214   return (LPSTREAM)This;
 215 }
 216
 217 const IID* get_ip_iid(PMIDL_STUB_MESSAGE pStubMsg, unsigned char *pMemory, PFORMAT_STRING pFormat)
 218 {
 219   const IID *riid;
 220   if (!pFormat) return &IID_IUnknown;
 221   TRACE("format=%02x %02x\n", pFormat[0], pFormat[1]);
 222   if (pFormat[0] != RPC_FC_IP) FIXME("format=%d\n", pFormat[0]);
 223   if (pFormat[1] == RPC_FC_CONSTANT_IID) {
 224     riid = (const IID *)&pFormat[2];
 225   } else {
 226     ComputeConformance(pStubMsg, pMemory, pFormat+2, 0);
 227     riid = (const IID *)pStubMsg->MaxCount;
 228   }
 229   if (!riid) riid = &IID_IUnknown;
 230   TRACE("got %s\n", debugstr_guid(riid));
 231   return riid;
 232 }
 233
 234 /***********************************************************************
 235  *           NdrInterfacePointerMarshall [RPCRT4.@]
 236  */
 237 unsigned char * WINAPI NdrInterfacePointerMarshall(PMIDL_STUB_MESSAGE pStubMsg,
 238                                                   unsigned char *pMemory,
 239                                                   PFORMAT_STRING pFormat)
 240 {
 241   const IID *riid = get_ip_iid(pStubMsg, pMemory, pFormat);
 242   LPSTREAM stream;
 243   HRESULT hr;
 244
 245   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 246   pStubMsg->MaxCount = 0;
 247   if (!LoadCOM()) return NULL;
 248   stream = RpcStream_Create(pStubMsg, TRUE);
 249   hr = COM_MarshalInterface(stream, riid, (LPUNKNOWN)pMemory,
 250                            pStubMsg->dwDestContext, pStubMsg->pvDestContext,
 251                            MSHLFLAGS_NORMAL);
 252   IStream_Release(stream);
 253   return NULL;
 254 }
 255
 256 /***********************************************************************
 257  *           NdrInterfacePointerUnmarshall [RPCRT4.@]
 258  */
 259 unsigned char * WINAPI NdrInterfacePointerUnmarshall(PMIDL_STUB_MESSAGE pStubMsg,
 260                                                     unsigned char **ppMemory,
 261                                                     PFORMAT_STRING pFormat,
 262                                                     unsigned char fMustAlloc)
 263 {
 264   LPSTREAM stream;
 265   HRESULT hr;
 266
 267   TRACE("(%p,%p,%p,%d)\n", pStubMsg, ppMemory, pFormat, fMustAlloc);
 268   if (!LoadCOM()) return NULL;
 269   *(LPVOID*)ppMemory = NULL;
 270   stream = RpcStream_Create(pStubMsg, FALSE);
 271   hr = COM_UnmarshalInterface(stream, &IID_NULL, (LPVOID*)ppMemory);
 272   IStream_Release(stream);
 273   return NULL;
 274 }
 275
 276 /***********************************************************************
 277  *           NdrInterfacePointerBufferSize [RPCRT4.@]
 278  */
 279 void WINAPI NdrInterfacePointerBufferSize(PMIDL_STUB_MESSAGE pStubMsg,
 280                                          unsigned char *pMemory,
 281                                          PFORMAT_STRING pFormat)
 282 {
 283   const IID *riid = get_ip_iid(pStubMsg, pMemory, pFormat);
 284   ULONG size = 0;
 285   HRESULT hr;
 286
 287   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 288   if (!LoadCOM()) return;
 289   hr = COM_GetMarshalSizeMax(&size, riid, (LPUNKNOWN)pMemory,
 290                             pStubMsg->dwDestContext, pStubMsg->pvDestContext,
 291                             MSHLFLAGS_NORMAL);
 292   TRACE("size=%ld\n", size);
 293   pStubMsg->BufferLength += sizeof(DWORD) + size;
 294 }
 295
 296 /***********************************************************************
 297  *           NdrInterfacePointerMemorySize [RPCRT4.@]
 298  */
 299 unsigned long WINAPI NdrInterfacePointerMemorySize(PMIDL_STUB_MESSAGE pStubMsg,
 300                                                   PFORMAT_STRING pFormat)
 301 {
 302   FIXME("(%p,%p): stub\n", pStubMsg, pFormat);
 303   return 0;
 304 }
 305
 306 /***********************************************************************
 307  *           NdrInterfacePointerFree [RPCRT4.@]
 308  */
 309 void WINAPI NdrInterfacePointerFree(PMIDL_STUB_MESSAGE pStubMsg,
 310                                    unsigned char *pMemory,
 311                                    PFORMAT_STRING pFormat)
 312 {
 313   LPUNKNOWN pUnk = (LPUNKNOWN)pMemory;
 314   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 315   if (pUnk) IUnknown_Release(pUnk);
 316 }
 317
 318 /***********************************************************************
 319  *           NdrOleAllocate [RPCRT4.@]
 320  */
 321 void * WINAPI NdrOleAllocate(size_t Size)
 322 {
 323   if (!LoadCOM()) return NULL;
 324   return COM_MemAlloc(Size);
 325 }
 326
 327 /***********************************************************************
 328  *           NdrOleFree [RPCRT4.@]
 329  */
 330 void WINAPI NdrOleFree(void *NodeToFree)
 331 {
 332   if (!LoadCOM()) return;
 333   COM_MemFree(NodeToFree);
 334 }
 335
 336 /* internal */
 337 HRESULT RPCRT4_GetPSFactory(REFIID riid, LPPSFACTORYBUFFER *pPS)
 338 {
 339   HRESULT hr;
 340   CLSID clsid;
 341
 342   if (!LoadCOM()) return RPC_E_UNEXPECTED;
 343   hr = COM_GetPSClsid(riid, &clsid);
 344   if (FAILED(hr)) return hr;
 345   hr = COM_GetClassObject(&clsid, CLSCTX_INPROC_SERVER, NULL,
 346                           &IID_IPSFactoryBuffer, (LPVOID *)pPS);
 347   return hr;
 348 }