dlls/rpcrt4/ndr_es.c

   1 /*
   2  * NDR Serialization Services
   3  *
   4  * Copyright (c) 2007 Robert Shearman for CodeWeavers
   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
  21 #include <stdarg.h>
  22 #include <stdio.h>
  23
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "winerror.h"
  27 #include "rpc.h"
  28 #include "midles.h"
  29 #include "ndrtypes.h"
  30
  31 #include "ndr_misc.h"
  32 #include "ndr_stubless.h"
  33
  34 #include "wine/debug.h"
  35 #include "wine/rpcfc.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  38
  39 static inline void init_MIDL_ES_MESSAGE(MIDL_ES_MESSAGE *pEsMsg)
  40 {
  41     memset(pEsMsg, 0, sizeof(*pEsMsg));
  42     /* even if we are unmarshalling, as we don't want pointers to be pointed
  43      * to buffer memory */
  44     pEsMsg->StubMsg.IsClient = TRUE;
  45 }
  46
  47 /***********************************************************************
  48  *            MesEncodeIncrementalHandleCreate [RPCRT4.@]
  49  */
  50 RPC_STATUS WINAPI MesEncodeIncrementalHandleCreate(
  51     void *UserState, MIDL_ES_ALLOC AllocFn, MIDL_ES_WRITE WriteFn,
  52     handle_t *pHandle)
  53 {
  54     MIDL_ES_MESSAGE *pEsMsg;
  55
  56     TRACE("(%p, %p, %p, %p)\n", UserState, AllocFn, WriteFn, pHandle);
  57
  58     pEsMsg = HeapAlloc(GetProcessHeap(), 0, sizeof(*pEsMsg));
  59     if (!pEsMsg)
  60         return ERROR_OUTOFMEMORY;
  61
  62     init_MIDL_ES_MESSAGE(pEsMsg);
  63
  64     pEsMsg->Operation = MES_ENCODE;
  65     pEsMsg->UserState = UserState;
  66     pEsMsg->HandleStyle = MES_INCREMENTAL_HANDLE;
  67     pEsMsg->Alloc = AllocFn;
  68     pEsMsg->Write = WriteFn;
  69
  70     *pHandle = (handle_t)pEsMsg;
  71
  72     return RPC_S_OK;
  73 }
  74
  75 /***********************************************************************
  76  *            MesDecodeIncrementalHandleCreate [RPCRT4.@]
  77  */
  78 RPC_STATUS WINAPI MesDecodeIncrementalHandleCreate(
  79     void *UserState, MIDL_ES_READ ReadFn, handle_t *pHandle)
  80 {
  81     MIDL_ES_MESSAGE *pEsMsg;
  82
  83     TRACE("(%p, %p, %p)\n", UserState, ReadFn, pHandle);
  84
  85     pEsMsg = HeapAlloc(GetProcessHeap(), 0, sizeof(*pEsMsg));
  86     if (!pEsMsg)
  87         return ERROR_OUTOFMEMORY;
  88
  89     init_MIDL_ES_MESSAGE(pEsMsg);
  90
  91     pEsMsg->Operation = MES_DECODE;
  92     pEsMsg->UserState = UserState;
  93     pEsMsg->HandleStyle = MES_INCREMENTAL_HANDLE;
  94     pEsMsg->Read = ReadFn;
  95
  96     *pHandle = (handle_t)pEsMsg;
  97
  98     return RPC_S_OK;
  99 }
 100
 101 /***********************************************************************
 102  *            MesIncrementalHandleReset [RPCRT4.@]
 103  */
 104 RPC_STATUS WINAPI MesIncrementalHandleReset(
 105     handle_t Handle, void *UserState, MIDL_ES_ALLOC AllocFn,
 106     MIDL_ES_WRITE WriteFn, MIDL_ES_READ ReadFn, MIDL_ES_CODE Operation)
 107 {
 108     MIDL_ES_MESSAGE *pEsMsg = (MIDL_ES_MESSAGE *)Handle;
 109
 110     TRACE("(%p, %p, %p, %p, %p, %d)\n", Handle, UserState, AllocFn,
 111         WriteFn, ReadFn, Operation);
 112
 113     init_MIDL_ES_MESSAGE(pEsMsg);
 114
 115     pEsMsg->Operation = Operation;
 116     pEsMsg->UserState = UserState;
 117     pEsMsg->HandleStyle = MES_INCREMENTAL_HANDLE;
 118     pEsMsg->Alloc = AllocFn;
 119     pEsMsg->Write = WriteFn;
 120     pEsMsg->Read = ReadFn;
 121
 122     return RPC_S_OK;
 123 }
 124
 125 /***********************************************************************
 126  *            MesHandleFree [RPCRT4.@]
 127  */
 128 RPC_STATUS WINAPI MesHandleFree(handle_t Handle)
 129 {
 130     TRACE("(%p)\n", Handle);
 131     HeapFree(GetProcessHeap(), 0, Handle);
 132     return RPC_S_OK;
 133 }
 134
 135 /***********************************************************************
 136  *            MesEncodeFixedBufferHandleCreate [RPCRT4.@]
 137  */
 138 RPC_STATUS RPC_ENTRY MesEncodeFixedBufferHandleCreate(
 139     char *Buffer, ULONG BufferSize, ULONG *pEncodedSize, handle_t *pHandle)
 140 {
 141     MIDL_ES_MESSAGE *pEsMsg;
 142
 143     TRACE("(%p, %d, %p, %p)\n", Buffer, BufferSize, pEncodedSize, pHandle);
 144
 145     pEsMsg = HeapAlloc(GetProcessHeap(), 0, sizeof(*pEsMsg));
 146     if (!pEsMsg)
 147         return ERROR_OUTOFMEMORY;
 148
 149     init_MIDL_ES_MESSAGE(pEsMsg);
 150
 151     pEsMsg->Operation = MES_ENCODE;
 152     pEsMsg->HandleStyle = MES_FIXED_BUFFER_HANDLE;
 153     pEsMsg->Buffer = (unsigned char *)Buffer;
 154     pEsMsg->BufferSize = BufferSize;
 155     pEsMsg->pEncodedSize = pEncodedSize;
 156
 157     *pHandle = (handle_t)pEsMsg;
 158
 159     return RPC_S_OK;
 160 }
 161
 162 /***********************************************************************
 163  *            MesEncodeDynBufferHandleCreate [RPCRT4.@]
 164  */
 165 RPC_STATUS RPC_ENTRY MesEncodeDynBufferHandleCreate(char **ppBuffer,
 166         ULONG *pEncodedSize, handle_t *pHandle)
 167 {
 168     FIXME("%p %p %p stub\n", ppBuffer, pEncodedSize, pHandle);
 169     return RPC_S_OK;
 170 }
 171
 172 /***********************************************************************
 173  *            MesDecodeBufferHandleCreate [RPCRT4.@]
 174  */
 175 RPC_STATUS RPC_ENTRY MesDecodeBufferHandleCreate(
 176     char *Buffer, ULONG BufferSize, handle_t *pHandle)
 177 {
 178     MIDL_ES_MESSAGE *pEsMsg;
 179
 180     TRACE("(%p, %d, %p)\n", Buffer, BufferSize, pHandle);
 181
 182     pEsMsg = HeapAlloc(GetProcessHeap(), 0, sizeof(*pEsMsg));
 183     if (!pEsMsg)
 184         return ERROR_OUTOFMEMORY;
 185
 186     init_MIDL_ES_MESSAGE(pEsMsg);
 187
 188     pEsMsg->Operation = MES_DECODE;
 189     pEsMsg->HandleStyle = MES_FIXED_BUFFER_HANDLE;
 190     pEsMsg->Buffer = (unsigned char *)Buffer;
 191     pEsMsg->BufferSize = BufferSize;
 192
 193     *pHandle = (handle_t)pEsMsg;
 194
 195     return RPC_S_OK;
 196 }
 197
 198 static void es_data_alloc(MIDL_ES_MESSAGE *pEsMsg, ULONG size)
 199 {
 200     if (pEsMsg->HandleStyle == MES_INCREMENTAL_HANDLE)
 201     {
 202         unsigned int tmpsize = size;
 203         TRACE("%d with incremental handle\n", size);
 204         pEsMsg->Alloc(pEsMsg->UserState, (char **)&pEsMsg->StubMsg.Buffer, &tmpsize);
 205         if (tmpsize < size)
 206         {
 207             ERR("not enough bytes allocated - requested %d, got %d\n", size, tmpsize);
 208             RpcRaiseException(ERROR_OUTOFMEMORY);
 209         }
 210     }
 211     else if (pEsMsg->HandleStyle == MES_FIXED_BUFFER_HANDLE)
 212     {
 213         TRACE("%d with fixed buffer handle\n", size);
 214         pEsMsg->StubMsg.Buffer = pEsMsg->Buffer;
 215     }
 216     pEsMsg->StubMsg.RpcMsg->Buffer = pEsMsg->StubMsg.BufferStart = pEsMsg->StubMsg.Buffer;
 217 }
 218
 219 static void es_data_read(MIDL_ES_MESSAGE *pEsMsg, ULONG size)
 220 {
 221     if (pEsMsg->HandleStyle == MES_INCREMENTAL_HANDLE)
 222     {
 223         unsigned int tmpsize = size;
 224         TRACE("%d from incremental handle\n", size);
 225         pEsMsg->Read(pEsMsg->UserState, (char **)&pEsMsg->StubMsg.Buffer, &tmpsize);
 226         if (tmpsize < size)
 227         {
 228             ERR("not enough bytes read - requested %d, got %d\n", size, tmpsize);
 229             RpcRaiseException(ERROR_OUTOFMEMORY);
 230         }
 231     }
 232     else
 233     {
 234         TRACE("%d from fixed or dynamic buffer handle\n", size);
 235         /* FIXME: validate BufferSize? */
 236         pEsMsg->StubMsg.Buffer = pEsMsg->Buffer;
 237         pEsMsg->Buffer += size;
 238         pEsMsg->BufferSize -= size;
 239     }
 240     pEsMsg->StubMsg.BufferLength = size;
 241     pEsMsg->StubMsg.RpcMsg->Buffer = pEsMsg->StubMsg.BufferStart = pEsMsg->StubMsg.Buffer;
 242     pEsMsg->StubMsg.BufferEnd = pEsMsg->StubMsg.Buffer + size;
 243 }
 244
 245 static void es_data_write(MIDL_ES_MESSAGE *pEsMsg, ULONG size)
 246 {
 247     if (pEsMsg->HandleStyle == MES_INCREMENTAL_HANDLE)
 248     {
 249         TRACE("%d to incremental handle\n", size);
 250         pEsMsg->Write(pEsMsg->UserState, (char *)pEsMsg->StubMsg.BufferStart, size);
 251     }
 252     else
 253     {
 254         TRACE("%d to dynamic or fixed buffer handle\n", size);
 255         *pEsMsg->pEncodedSize += size;
 256     }
 257 }
 258
 259 static inline ULONG mes_proc_header_buffer_size(void)
 260 {
 261     return 4 + 2*sizeof(RPC_SYNTAX_IDENTIFIER) + 12;
 262 }
 263
 264 static void mes_proc_header_marshal(MIDL_ES_MESSAGE *pEsMsg)
 265 {
 266     const RPC_CLIENT_INTERFACE *client_interface = pEsMsg->StubMsg.StubDesc->RpcInterfaceInformation;
 267     *(WORD *)pEsMsg->StubMsg.Buffer = 0x0101;
 268     pEsMsg->StubMsg.Buffer += 2;
 269     *(WORD *)pEsMsg->StubMsg.Buffer = 0xcccc;
 270     pEsMsg->StubMsg.Buffer += 2;
 271     memcpy(pEsMsg->StubMsg.Buffer, &client_interface->TransferSyntax, sizeof(RPC_SYNTAX_IDENTIFIER));
 272     pEsMsg->StubMsg.Buffer += sizeof(RPC_SYNTAX_IDENTIFIER);
 273     memcpy(pEsMsg->StubMsg.Buffer, &pEsMsg->InterfaceId, sizeof(RPC_SYNTAX_IDENTIFIER));
 274     pEsMsg->StubMsg.Buffer += sizeof(RPC_SYNTAX_IDENTIFIER);
 275     *(DWORD *)pEsMsg->StubMsg.Buffer = pEsMsg->ProcNumber;
 276     pEsMsg->StubMsg.Buffer += 4;
 277     *(DWORD *)pEsMsg->StubMsg.Buffer = 0x00000001;
 278     pEsMsg->StubMsg.Buffer += 4;
 279     *(DWORD *)pEsMsg->StubMsg.Buffer = pEsMsg->ByteCount;
 280     pEsMsg->StubMsg.Buffer += 4;
 281 }
 282
 283 static void mes_proc_header_unmarshal(MIDL_ES_MESSAGE *pEsMsg)
 284 {
 285     const RPC_CLIENT_INTERFACE *client_interface = pEsMsg->StubMsg.StubDesc->RpcInterfaceInformation;
 286
 287     es_data_read(pEsMsg, mes_proc_header_buffer_size());
 288
 289     if (*(WORD *)pEsMsg->StubMsg.Buffer != 0x0101)
 290     {
 291         FIXME("unknown value at Buffer[0] 0x%04x\n", *(WORD *)pEsMsg->StubMsg.Buffer);
 292         RpcRaiseException(RPC_X_WRONG_ES_VERSION);
 293     }
 294     pEsMsg->StubMsg.Buffer += 2;
 295     if (*(WORD *)pEsMsg->StubMsg.Buffer != 0xcccc)
 296         FIXME("unknown value at Buffer[2] 0x%04x\n", *(WORD *)pEsMsg->StubMsg.Buffer);
 297     pEsMsg->StubMsg.Buffer += 2;
 298     if (memcmp(pEsMsg->StubMsg.Buffer, &client_interface->TransferSyntax, sizeof(RPC_SYNTAX_IDENTIFIER)))
 299     {
 300         const RPC_SYNTAX_IDENTIFIER *AlienTransferSyntax = (const RPC_SYNTAX_IDENTIFIER *)pEsMsg->StubMsg.Buffer;
 301         ERR("bad transfer syntax %s {%d.%d}\n", debugstr_guid(&AlienTransferSyntax->SyntaxGUID),
 302             AlienTransferSyntax->SyntaxVersion.MajorVersion,
 303             AlienTransferSyntax->SyntaxVersion.MinorVersion);
 304         RpcRaiseException(RPC_S_UNSUPPORTED_TRANS_SYN);
 305     }
 306     pEsMsg->StubMsg.Buffer += sizeof(RPC_SYNTAX_IDENTIFIER);
 307     memcpy(&pEsMsg->InterfaceId, pEsMsg->StubMsg.Buffer, sizeof(RPC_SYNTAX_IDENTIFIER));
 308     pEsMsg->StubMsg.Buffer += sizeof(RPC_SYNTAX_IDENTIFIER);
 309     pEsMsg->ProcNumber = *(DWORD *)pEsMsg->StubMsg.Buffer;
 310     pEsMsg->StubMsg.Buffer += 4;
 311     if (*(DWORD *)pEsMsg->StubMsg.Buffer != 0x00000001)
 312         FIXME("unknown value 0x%08x, expected 0x00000001\n", *(DWORD *)pEsMsg->StubMsg.Buffer);
 313     pEsMsg->StubMsg.Buffer += 4;
 314     pEsMsg->ByteCount = *(DWORD *)pEsMsg->StubMsg.Buffer;
 315     pEsMsg->StubMsg.Buffer += 4;
 316     if (pEsMsg->ByteCount + mes_proc_header_buffer_size() < pEsMsg->ByteCount)
 317         RpcRaiseException(RPC_S_INVALID_BOUND);
 318 }
 319
 320 /***********************************************************************
 321  *            NdrMesProcEncodeDecode [RPCRT4.@]
 322  */
 323 void WINAPIV NdrMesProcEncodeDecode(handle_t Handle, const MIDL_STUB_DESC * pStubDesc, PFORMAT_STRING pFormat, ...)
 324 {
 325     /* pointer to start of stack where arguments start */
 326     RPC_MESSAGE rpcMsg;
 327     MIDL_ES_MESSAGE *pEsMsg = (MIDL_ES_MESSAGE *)Handle;
 328     /* size of stack */
 329     unsigned short stack_size;
 330     /* header for procedure string */
 331     const NDR_PROC_HEADER *pProcHeader = (const NDR_PROC_HEADER *)&pFormat[0];
 332     /* the value to return to the client from the remote procedure */
 333     LONG_PTR RetVal = 0;
 334     const RPC_CLIENT_INTERFACE *client_interface;
 335
 336     TRACE("Handle %p, pStubDesc %p, pFormat %p, ...\n", Handle, pStubDesc, pFormat);
 337
 338     /* Later NDR language versions probably won't be backwards compatible */
 339     if (pStubDesc->Version > 0x50002)
 340     {
 341         FIXME("Incompatible stub description version: 0x%x\n", pStubDesc->Version);
 342         RpcRaiseException(RPC_X_WRONG_STUB_VERSION);
 343     }
 344
 345     client_interface = pStubDesc->RpcInterfaceInformation;
 346     pEsMsg->InterfaceId = client_interface->InterfaceId;
 347
 348     if (pProcHeader->Oi_flags & RPC_FC_PROC_OIF_RPCFLAGS)
 349     {
 350         const NDR_PROC_HEADER_RPC *pProcHeader = (const NDR_PROC_HEADER_RPC *)&pFormat[0];
 351         stack_size = pProcHeader->stack_size;
 352         pEsMsg->ProcNumber = pProcHeader->proc_num;
 353         pFormat += sizeof(NDR_PROC_HEADER_RPC);
 354     }
 355     else
 356     {
 357         stack_size = pProcHeader->stack_size;
 358         pEsMsg->ProcNumber = pProcHeader->proc_num;
 359         pFormat += sizeof(NDR_PROC_HEADER);
 360     }
 361
 362     if (pProcHeader->handle_type == RPC_FC_BIND_EXPLICIT)
 363     {
 364         switch (*pFormat) /* handle_type */
 365         {
 366         case RPC_FC_BIND_PRIMITIVE: /* explicit primitive */
 367             pFormat += sizeof(NDR_EHD_PRIMITIVE);
 368             break;
 369         case RPC_FC_BIND_GENERIC: /* explicit generic */
 370             pFormat += sizeof(NDR_EHD_GENERIC);
 371             break;
 372         case RPC_FC_BIND_CONTEXT: /* explicit context */
 373             pFormat += sizeof(NDR_EHD_CONTEXT);
 374             break;
 375         default:
 376             ERR("bad explicit binding handle type (0x%02x)\n", pProcHeader->handle_type);
 377             RpcRaiseException(RPC_X_BAD_STUB_DATA);
 378         }
 379     }
 380
 381     TRACE("stack size: 0x%x\n", stack_size);
 382     TRACE("proc num: %d\n", pEsMsg->ProcNumber);
 383
 384     memset(&rpcMsg, 0, sizeof(rpcMsg));
 385     pEsMsg->StubMsg.RpcMsg = &rpcMsg;
 386     pEsMsg->StubMsg.StubDesc = pStubDesc;
 387     pEsMsg->StubMsg.pfnAllocate = pStubDesc->pfnAllocate;
 388     pEsMsg->StubMsg.pfnFree = pStubDesc->pfnFree;
 389
 390     /* create the full pointer translation tables, if requested */
 391     if (pProcHeader->Oi_flags & RPC_FC_PROC_OIF_FULLPTR)
 392         pEsMsg->StubMsg.FullPtrXlatTables = NdrFullPointerXlatInit(0,XLAT_CLIENT);
 393
 394     TRACE("Oi_flags = 0x%02x\n", pProcHeader->Oi_flags);
 395     TRACE("stubdesc version = 0x%x\n", pStubDesc->Version);
 396     TRACE("MIDL stub version = 0x%x\n", pStubDesc->MIDLVersion);
 397
 398     /* needed for conformance of top-level objects */
 399 #ifdef __i386__
 400     pEsMsg->StubMsg.StackTop = *(unsigned char **)(&pFormat+1);
 401 #else
 402 # warning Stack not retrieved for your CPU architecture
 403 #endif
 404
 405     switch (pEsMsg->Operation)
 406     {
 407     case MES_ENCODE:
 408         pEsMsg->StubMsg.BufferLength = mes_proc_header_buffer_size();
 409
 410         client_do_args_old_format(&pEsMsg->StubMsg, pFormat, PROXY_CALCSIZE,
 411             pEsMsg->StubMsg.StackTop, stack_size, (unsigned char *)&RetVal,
 412             FALSE /* object_proc */, TRUE /* ignore_retval */);
 413
 414         pEsMsg->ByteCount = pEsMsg->StubMsg.BufferLength - mes_proc_header_buffer_size();
 415         es_data_alloc(pEsMsg, pEsMsg->StubMsg.BufferLength);
 416
 417         mes_proc_header_marshal(pEsMsg);
 418
 419         client_do_args_old_format(&pEsMsg->StubMsg, pFormat, PROXY_MARSHAL,
 420             pEsMsg->StubMsg.StackTop, stack_size, (unsigned char *)&RetVal,
 421             FALSE /* object_proc */, TRUE /* ignore_retval */);
 422
 423         es_data_write(pEsMsg, pEsMsg->ByteCount);
 424         break;
 425     case MES_DECODE:
 426         mes_proc_header_unmarshal(pEsMsg);
 427
 428         es_data_read(pEsMsg, pEsMsg->ByteCount);
 429
 430         client_do_args_old_format(&pEsMsg->StubMsg, pFormat, PROXY_UNMARSHAL,
 431             pEsMsg->StubMsg.StackTop, stack_size, (unsigned char *)&RetVal,
 432             FALSE /* object_proc */, TRUE /* ignore_retval */);
 433         break;
 434     default:
 435         RpcRaiseException(RPC_S_INTERNAL_ERROR);
 436         return;
 437     }
 438     /* free the full pointer translation tables */
 439     if (pProcHeader->Oi_flags & RPC_FC_PROC_OIF_FULLPTR)
 440         NdrFullPointerXlatFree(pEsMsg->StubMsg.FullPtrXlatTables);
 441 }