reactos/lib/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   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 = 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   if (This->pos + cb > *This->size) cb = *This->size - This->pos;
 130   if (cb) {
 131     memcpy(pv, This->data + This->pos, cb);
 132     This->pos += cb;
 133   }
 134   if (pcbRead) *pcbRead = cb;
 135   return S_OK;
 136 }
 137
 138 static HRESULT WINAPI RpcStream_Write(LPSTREAM iface,
 139                                      const void *pv,
 140                                      ULONG cb,
 141                                      ULONG *pcbWritten)
 142 {
 143   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 144   memcpy(This->data + This->pos, pv, cb);
 145   This->pos += cb;
 146   if (This->pos > *This->size) *This->size = This->pos;
 147   if (pcbWritten) *pcbWritten = cb;
 148   return S_OK;
 149 }
 150
 151 static HRESULT WINAPI RpcStream_Seek(LPSTREAM iface,
 152                                     LARGE_INTEGER move,
 153                                     DWORD origin,
 154                                     ULARGE_INTEGER *newPos)
 155 {
 156   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 157   switch (origin) {
 158   case STREAM_SEEK_SET:
 159     This->pos = move.u.LowPart;
 160     break;
 161   case STREAM_SEEK_CUR:
 162     This->pos = This->pos + move.u.LowPart;
 163     break;
 164   case STREAM_SEEK_END:
 165     This->pos = *This->size + move.u.LowPart;
 166     break;
 167   default:
 168     return STG_E_INVALIDFUNCTION;
 169   }
 170   if (newPos) {
 171     newPos->u.LowPart = This->pos;
 172     newPos->u.HighPart = 0;
 173   }
 174   return S_OK;
 175 }
 176
 177 static HRESULT WINAPI RpcStream_SetSize(LPSTREAM iface,
 178                                        ULARGE_INTEGER newSize)
 179 {
 180   RpcStreamImpl *This = (RpcStreamImpl *)iface;
 181   *This->size = newSize.u.LowPart;
 182   return S_OK;
 183 }
 184
 185 static IStreamVtbl RpcStream_Vtbl =
 186 {
 187   RpcStream_QueryInterface,
 188   RpcStream_AddRef,
 189   RpcStream_Release,
 190   RpcStream_Read,
 191   RpcStream_Write,
 192   RpcStream_Seek,
 193   RpcStream_SetSize,
 194   NULL, /* CopyTo */
 195   NULL, /* Commit */
 196   NULL, /* Revert */
 197   NULL, /* LockRegion */
 198   NULL, /* UnlockRegion */
 199   NULL, /* Stat */
 200   NULL  /* Clone */
 201 };
 202
 203 static LPSTREAM RpcStream_Create(PMIDL_STUB_MESSAGE pStubMsg, BOOL init)
 204 {
 205   RpcStreamImpl *This;
 206   This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(RpcStreamImpl));
 207   if (!This) return NULL;
 208   This->lpVtbl = &RpcStream_Vtbl;
 209   This->RefCount = 1;
 210   This->pMsg = pStubMsg;
 211   This->size = (LPDWORD)pStubMsg->Buffer;
 212   This->data = (char*)(This->size + 1);
 213   This->pos = 0;
 214   if (init) *This->size = 0;
 215   TRACE("init size=%ld\n", *This->size);
 216   return (LPSTREAM)This;
 217 }
 218
 219 const IID* get_ip_iid(PMIDL_STUB_MESSAGE pStubMsg, unsigned char *pMemory, PFORMAT_STRING pFormat)
 220 {
 221   const IID *riid;
 222   if (!pFormat) return &IID_IUnknown;
 223   TRACE("format=%02x %02x\n", pFormat[0], pFormat[1]);
 224   if (pFormat[0] != RPC_FC_IP) FIXME("format=%d\n", pFormat[0]);
 225   if (pFormat[1] == RPC_FC_CONSTANT_IID) {
 226     riid = (const IID *)&pFormat[2];
 227   } else {
 228     ComputeConformance(pStubMsg, pMemory, pFormat+2, 0);
 229     riid = (const IID *)pStubMsg->MaxCount;
 230   }
 231   if (!riid) riid = &IID_IUnknown;
 232   TRACE("got %s\n", debugstr_guid(riid));
 233   return riid;
 234 }
 235
 236 /***********************************************************************
 237  *           NdrInterfacePointerMarshall [RPCRT4.@]
 238  */
 239 unsigned char * WINAPI NdrInterfacePointerMarshall(PMIDL_STUB_MESSAGE pStubMsg,
 240                                                   unsigned char *pMemory,
 241                                                   PFORMAT_STRING pFormat)
 242 {
 243   const IID *riid = get_ip_iid(pStubMsg, pMemory, pFormat);
 244   LPSTREAM stream;
 245   HRESULT hr;
 246
 247   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 248   pStubMsg->MaxCount = 0;
 249   if (!LoadCOM()) return NULL;
 250   stream = RpcStream_Create(pStubMsg, TRUE);
 251   hr = COM_MarshalInterface(stream, riid, (LPUNKNOWN)pMemory,
 252                            pStubMsg->dwDestContext, pStubMsg->pvDestContext,
 253                            MSHLFLAGS_NORMAL);
 254   IStream_Release(stream);
 255   return NULL;
 256 }
 257
 258 /***********************************************************************
 259  *           NdrInterfacePointerUnmarshall [RPCRT4.@]
 260  */
 261 unsigned char * WINAPI NdrInterfacePointerUnmarshall(PMIDL_STUB_MESSAGE pStubMsg,
 262                                                     unsigned char **ppMemory,
 263                                                     PFORMAT_STRING pFormat,
 264                                                     unsigned char fMustAlloc)
 265 {
 266   LPSTREAM stream;
 267   HRESULT hr;
 268
 269   TRACE("(%p,%p,%p,%d)\n", pStubMsg, ppMemory, pFormat, fMustAlloc);
 270   if (!LoadCOM()) return NULL;
 271   *(LPVOID*)ppMemory = NULL;
 272   stream = RpcStream_Create(pStubMsg, FALSE);
 273   hr = COM_UnmarshalInterface(stream, &IID_NULL, (LPVOID*)ppMemory);
 274   IStream_Release(stream);
 275   return NULL;
 276 }
 277
 278 /***********************************************************************
 279  *           NdrInterfacePointerBufferSize [RPCRT4.@]
 280  */
 281 void WINAPI NdrInterfacePointerBufferSize(PMIDL_STUB_MESSAGE pStubMsg,
 282                                          unsigned char *pMemory,
 283                                          PFORMAT_STRING pFormat)
 284 {
 285   const IID *riid = get_ip_iid(pStubMsg, pMemory, pFormat);
 286   ULONG size = 0;
 287   HRESULT hr;
 288
 289   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 290   if (!LoadCOM()) return;
 291   hr = COM_GetMarshalSizeMax(&size, riid, (LPUNKNOWN)pMemory,
 292                             pStubMsg->dwDestContext, pStubMsg->pvDestContext,
 293                             MSHLFLAGS_NORMAL);
 294   TRACE("size=%ld\n", size);
 295   pStubMsg->BufferLength += sizeof(DWORD) + size;
 296 }
 297
 298 /***********************************************************************
 299  *           NdrInterfacePointerMemorySize [RPCRT4.@]
 300  */
 301 unsigned long WINAPI NdrInterfacePointerMemorySize(PMIDL_STUB_MESSAGE pStubMsg,
 302                                                   PFORMAT_STRING pFormat)
 303 {
 304   FIXME("(%p,%p): stub\n", pStubMsg, pFormat);
 305   return 0;
 306 }
 307
 308 /***********************************************************************
 309  *           NdrInterfacePointerFree [RPCRT4.@]
 310  */
 311 void WINAPI NdrInterfacePointerFree(PMIDL_STUB_MESSAGE pStubMsg,
 312                                    unsigned char *pMemory,
 313                                    PFORMAT_STRING pFormat)
 314 {
 315   LPUNKNOWN pUnk = (LPUNKNOWN)pMemory;
 316   TRACE("(%p,%p,%p)\n", pStubMsg, pMemory, pFormat);
 317   if (pUnk) IUnknown_Release(pUnk);
 318 }
 319
 320 /***********************************************************************
 321  *           NdrOleAllocate [RPCRT4.@]
 322  */
 323 void * WINAPI NdrOleAllocate(size_t Size)
 324 {
 325   if (!LoadCOM()) return NULL;
 326   return COM_MemAlloc(Size);
 327 }
 328
 329 /***********************************************************************
 330  *           NdrOleFree [RPCRT4.@]
 331  */
 332 void WINAPI NdrOleFree(void *NodeToFree)
 333 {
 334   if (!LoadCOM()) return;
 335   COM_MemFree(NodeToFree);
 336 }
 337
 338 /* internal */
 339 HRESULT RPCRT4_GetPSFactory(REFIID riid, LPPSFACTORYBUFFER *pPS)
 340 {
 341   HRESULT hr;
 342   CLSID clsid;
 343
 344   if (!LoadCOM()) return RPC_E_UNEXPECTED;
 345   hr = COM_GetPSClsid(riid, &clsid);
 346   if (FAILED(hr)) return hr;
 347   hr = COM_GetClassObject(&clsid, CLSCTX_INPROC_SERVER, NULL,
 348                           &IID_IPSFactoryBuffer, (LPVOID *)pPS);
 349   return hr;
 350 }