dlls/rpcrt4/rpc_message.c

   1 /*
   2  * RPC messages
   3  *
   4  * Copyright 2001-2002 Ove Kåven, TransGaming Technologies
   5  * Copyright 2004 Filip Navara
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * TODO:
  22  *  - figure out whether we *really* got this right
  23  *  - check for errors and throw exceptions
  24  */
  25
  26 #include <stdarg.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "winerror.h"
  33 #include "winreg.h"
  34
  35 #include "rpc.h"
  36 #include "rpcndr.h"
  37 #include "rpcdcep.h"
  38
  39 #include "wine/debug.h"
  40
  41 #include "rpc_binding.h"
  42 #include "rpc_misc.h"
  43 #include "rpc_defs.h"
  44
  45 WINE_DEFAULT_DEBUG_CHANNEL(ole);
  46
  47 DWORD RPCRT4_GetHeaderSize(RpcPktHdr *Header)
  48 {
  49   static const DWORD header_sizes[] = {
  50     sizeof(Header->request), 0, sizeof(Header->response),
  51     sizeof(Header->fault), 0, 0, 0, 0, 0, 0, 0, sizeof(Header->bind),
  52     sizeof(Header->bind_ack), sizeof(Header->bind_nack),
  53     0, 0, 0, 0, 0
  54   };
  55   ULONG ret = 0;
  56
  57   if (Header->common.ptype < sizeof(header_sizes) / sizeof(header_sizes[0])) {
  58     ret = header_sizes[Header->common.ptype];
  59     if (ret == 0)
  60       FIXME("unhandled packet type\n");
  61     if (Header->common.flags & RPC_FLG_OBJECT_UUID)
  62       ret += sizeof(UUID);
  63   } else {
  64     TRACE("invalid packet type\n");
  65   }
  66
  67   return ret;
  68 }
  69
  70 VOID RPCRT4_BuildCommonHeader(RpcPktHdr *Header, unsigned char PacketType,
  71                               unsigned long DataRepresentation)
  72 {
  73   Header->common.rpc_ver = RPC_VER_MAJOR;
  74   Header->common.rpc_ver_minor = RPC_VER_MINOR;
  75   Header->common.ptype = PacketType;
  76   Header->common.drep[0] = LOBYTE(LOWORD(DataRepresentation));
  77   Header->common.drep[1] = HIBYTE(LOWORD(DataRepresentation));
  78   Header->common.drep[2] = LOBYTE(HIWORD(DataRepresentation));
  79   Header->common.drep[3] = HIBYTE(HIWORD(DataRepresentation));
  80   Header->common.auth_len = 0;
  81   Header->common.call_id = 1;
  82   Header->common.flags = 0;
  83   /* Flags and fragment length are computed in RPCRT4_Send. */
  84 }
  85
  86 RpcPktHdr *RPCRT4_BuildRequestHeader(unsigned long DataRepresentation,
  87                                      unsigned long BufferLength,
  88                                      unsigned short ProcNum,
  89                                      UUID *ObjectUuid)
  90 {
  91   RpcPktHdr *header;
  92   BOOL has_object;
  93   RPC_STATUS status;
  94
  95   has_object = (ObjectUuid != NULL && !UuidIsNil(ObjectUuid, &status));
  96   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
  97                      sizeof(header->request) + (has_object ? sizeof(UUID) : 0));
  98   if (header == NULL) {
  99     return NULL;
 100   }
 101
 102   RPCRT4_BuildCommonHeader(header, PKT_REQUEST, DataRepresentation);
 103   header->common.frag_len = sizeof(header->request);
 104   header->request.alloc_hint = BufferLength;
 105   header->request.context_id = 0;
 106   header->request.opnum = ProcNum;
 107   if (has_object) {
 108     header->common.flags |= RPC_FLG_OBJECT_UUID;
 109     header->common.frag_len += sizeof(UUID);
 110     memcpy(&header->request + 1, ObjectUuid, sizeof(UUID));
 111   }
 112
 113   return header;
 114 }
 115
 116 RpcPktHdr *RPCRT4_BuildResponseHeader(unsigned long DataRepresentation,
 117                                       unsigned long BufferLength)
 118 {
 119   RpcPktHdr *header;
 120
 121   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->response));
 122   if (header == NULL) {
 123     return NULL;
 124   }
 125
 126   RPCRT4_BuildCommonHeader(header, PKT_RESPONSE, DataRepresentation);
 127   header->common.frag_len = sizeof(header->response);
 128   header->response.alloc_hint = BufferLength;
 129
 130   return header;
 131 }
 132
 133 RpcPktHdr *RPCRT4_BuildFaultHeader(unsigned long DataRepresentation,
 134                                    RPC_STATUS Status)
 135 {
 136   RpcPktHdr *header;
 137
 138   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->fault));
 139   if (header == NULL) {
 140     return NULL;
 141   }
 142
 143   RPCRT4_BuildCommonHeader(header, PKT_FAULT, DataRepresentation);
 144   header->common.frag_len = sizeof(header->fault);
 145   header->fault.status = Status;
 146
 147   return header;
 148 }
 149
 150 RpcPktHdr *RPCRT4_BuildBindHeader(unsigned long DataRepresentation,
 151                                   unsigned short MaxTransmissionSize,
 152                                   unsigned short MaxReceiveSize,
 153                                   RPC_SYNTAX_IDENTIFIER *AbstractId,
 154                                   RPC_SYNTAX_IDENTIFIER *TransferId)
 155 {
 156   RpcPktHdr *header;
 157
 158   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind));
 159   if (header == NULL) {
 160     return NULL;
 161   }
 162
 163   RPCRT4_BuildCommonHeader(header, PKT_BIND, DataRepresentation);
 164   header->common.frag_len = sizeof(header->bind);
 165   header->bind.max_tsize = MaxTransmissionSize;
 166   header->bind.max_rsize = MaxReceiveSize;
 167   header->bind.num_elements = 1;
 168   header->bind.num_syntaxes = 1;
 169   memcpy(&header->bind.abstract, AbstractId, sizeof(RPC_SYNTAX_IDENTIFIER));
 170   memcpy(&header->bind.transfer, TransferId, sizeof(RPC_SYNTAX_IDENTIFIER));
 171
 172   return header;
 173 }
 174
 175 RpcPktHdr *RPCRT4_BuildBindNackHeader(unsigned long DataRepresentation,
 176                                       unsigned char RpcVersion,
 177                                       unsigned char RpcVersionMinor)
 178 {
 179   RpcPktHdr *header;
 180
 181   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind_nack));
 182   if (header == NULL) {
 183     return NULL;
 184   }
 185
 186   RPCRT4_BuildCommonHeader(header, PKT_BIND_NACK, DataRepresentation);
 187   header->common.frag_len = sizeof(header->bind_nack);
 188   header->bind_nack.protocols_count = 1;
 189   header->bind_nack.protocols[0].rpc_ver = RpcVersion;
 190   header->bind_nack.protocols[0].rpc_ver_minor = RpcVersionMinor;
 191
 192   return header;
 193 }
 194
 195 RpcPktHdr *RPCRT4_BuildBindAckHeader(unsigned long DataRepresentation,
 196                                      unsigned short MaxTransmissionSize,
 197                                      unsigned short MaxReceiveSize,
 198                                      LPSTR ServerAddress,
 199                                      unsigned long Result,
 200                                      unsigned long Reason,
 201                                      RPC_SYNTAX_IDENTIFIER *TransferId)
 202 {
 203   RpcPktHdr *header;
 204   unsigned long header_size;
 205   RpcAddressString *server_address;
 206   RpcResults *results;
 207   RPC_SYNTAX_IDENTIFIER *transfer_id;
 208
 209   header_size = sizeof(header->bind_ack) + sizeof(RpcResults) +
 210                 sizeof(RPC_SYNTAX_IDENTIFIER) + sizeof(RpcAddressString) +
 211                 strlen(ServerAddress);
 212
 213   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, header_size);
 214   if (header == NULL) {
 215     return NULL;
 216   }
 217
 218   RPCRT4_BuildCommonHeader(header, PKT_BIND_ACK, DataRepresentation);
 219   header->common.frag_len = header_size;
 220   header->bind_ack.max_tsize = MaxTransmissionSize;
 221   header->bind_ack.max_rsize = MaxReceiveSize;
 222   server_address = (RpcAddressString*)(&header->bind_ack + 1);
 223   server_address->length = strlen(ServerAddress) + 1;
 224   strcpy(server_address->string, ServerAddress);
 225   results = (RpcResults*)((ULONG_PTR)server_address + sizeof(RpcAddressString) + server_address->length - 1);
 226   results->num_results = 1;
 227   results->results[0].result = Result;
 228   results->results[0].reason = Reason;
 229   transfer_id = (RPC_SYNTAX_IDENTIFIER*)(results + 1);
 230   memcpy(transfer_id, TransferId, sizeof(RPC_SYNTAX_IDENTIFIER));
 231
 232   return header;
 233 }
 234
 235 VOID RPCRT4_FreeHeader(RpcPktHdr *Header)
 236 {
 237   HeapFree(GetProcessHeap(), 0, Header);
 238 }
 239
 240 /***********************************************************************
 241  *           RPCRT4_Send (internal)
 242  *
 243  * Transmit a packet over connection in acceptable fragments.
 244  */
 245 RPC_STATUS RPCRT4_Send(RpcConnection *Connection, RpcPktHdr *Header,
 246                        void *Buffer, unsigned int BufferLength)
 247 {
 248   PUCHAR buffer_pos;
 249   DWORD hdr_size, count;
 250
 251   buffer_pos = Buffer;
 252   /* The packet building functions save the packet header size, so we can use it. */
 253   hdr_size = Header->common.frag_len;
 254   Header->common.flags |= RPC_FLG_FIRST;
 255   Header->common.flags &= ~RPC_FLG_LAST;
 256   while (!(Header->common.flags & RPC_FLG_LAST)) {
 257     /* decide if we need to split the packet into fragments */
 258     if ((BufferLength + hdr_size) <= Connection->MaxTransmissionSize) {
 259       Header->common.flags |= RPC_FLG_LAST;
 260       Header->common.frag_len = BufferLength + hdr_size;
 261     } else {
 262       Header->common.frag_len = Connection->MaxTransmissionSize;
 263       buffer_pos += Header->common.frag_len - hdr_size;
 264       BufferLength -= Header->common.frag_len - hdr_size;
 265     }
 266
 267     /* transmit packet header */
 268     if (!WriteFile(Connection->conn, Header, hdr_size, &count, NULL)) {
 269       WARN("WriteFile failed with error %ld\n", GetLastError());
 270       return GetLastError();
 271     }
 272
 273     /* fragment consisted of header only and is the last one */
 274     if (hdr_size == Header->common.frag_len &&
 275         Header->common.flags & RPC_FLG_LAST) {
 276       return RPC_S_OK;
 277     }
 278
 279     /* send the fragment data */
 280     if (!WriteFile(Connection->conn, buffer_pos, Header->common.frag_len - hdr_size, &count, NULL)) {
 281       WARN("WriteFile failed with error %ld\n", GetLastError());
 282       return GetLastError();
 283     }
 284
 285     Header->common.flags &= ~RPC_FLG_FIRST;
 286   }
 287
 288   return RPC_S_OK;
 289 }
 290
 291 /***********************************************************************
 292  *           RPCRT4_Receive (internal)
 293  *
 294  * Receive a packet from connection and merge the fragments.
 295  */
 296 RPC_STATUS RPCRT4_Receive(RpcConnection *Connection, RpcPktHdr **Header,
 297                           PRPC_MESSAGE pMsg)
 298 {
 299   RPC_STATUS status;
 300   DWORD dwRead, hdr_length;
 301   unsigned short first_flag;
 302   unsigned long data_length;
 303   unsigned long buffer_length;
 304   unsigned char *buffer_ptr;
 305   RpcPktCommonHdr common_hdr;
 306
 307   *Header = NULL;
 308
 309   TRACE("(%p, %p, %p)\n", Connection, Header, pMsg);
 310
 311   /* read packet common header */
 312   if (!ReadFile(Connection->conn, &common_hdr, sizeof(common_hdr), &dwRead, NULL)) {
 313     if (GetLastError() != ERROR_MORE_DATA) {
 314       WARN("ReadFile failed with error %ld\n", GetLastError());
 315       status = RPC_S_PROTOCOL_ERROR;
 316       goto fail;
 317     }
 318   }
 319   if (dwRead != sizeof(common_hdr)) {
 320     status = RPC_S_PROTOCOL_ERROR;
 321     goto fail;
 322   }
 323
 324   /* verify if the header really makes sense */
 325   if (common_hdr.rpc_ver != RPC_VER_MAJOR ||
 326       common_hdr.rpc_ver_minor != RPC_VER_MINOR) {
 327     WARN("unhandled packet version\n");
 328     status = RPC_S_PROTOCOL_ERROR;
 329     goto fail;
 330   }
 331
 332   hdr_length = RPCRT4_GetHeaderSize((RpcPktHdr*)&common_hdr);
 333   if (hdr_length == 0) {
 334     status = RPC_S_PROTOCOL_ERROR;
 335     goto fail;
 336   }
 337
 338   *Header = HeapAlloc(GetProcessHeap(), 0, hdr_length);
 339   memcpy(*Header, &common_hdr, sizeof(common_hdr));
 340
 341   /* read the rest of packet header */
 342   if (!ReadFile(Connection->conn, &(*Header)->common + 1,
 343                 hdr_length - sizeof(common_hdr), &dwRead, NULL)) {
 344     if (GetLastError() != ERROR_MORE_DATA) {
 345       WARN("ReadFile failed with error %ld\n", GetLastError());
 346       status = RPC_S_PROTOCOL_ERROR;
 347       goto fail;
 348     }
 349   }
 350   if (dwRead != hdr_length - sizeof(common_hdr)) {
 351     status = RPC_S_PROTOCOL_ERROR;
 352     goto fail;
 353   }
 354
 355   /* read packet body */
 356   switch (common_hdr.ptype) {
 357   case PKT_RESPONSE:
 358     pMsg->BufferLength = (*Header)->response.alloc_hint;
 359     break;
 360   case PKT_REQUEST:
 361     pMsg->BufferLength = (*Header)->request.alloc_hint;
 362     break;
 363   default:
 364     pMsg->BufferLength = common_hdr.frag_len - hdr_length;
 365   }
 366   status = I_RpcGetBuffer(pMsg);
 367   if (status != RPC_S_OK) goto fail;
 368
 369   first_flag = RPC_FLG_FIRST;
 370   buffer_length = 0;
 371   buffer_ptr = pMsg->Buffer;
 372   while (buffer_length < pMsg->BufferLength)
 373   {
 374     data_length = (*Header)->common.frag_len - hdr_length;
 375     if (((*Header)->common.flags & RPC_FLG_FIRST) != first_flag ||
 376         data_length + buffer_length > pMsg->BufferLength) {
 377       TRACE("invalid packet flags or buffer length\n");
 378       status = RPC_S_PROTOCOL_ERROR;
 379       goto fail;
 380     }
 381
 382     if (data_length == 0) dwRead = 0; else
 383     if (!ReadFile(Connection->conn, buffer_ptr, data_length, &dwRead, NULL)) {
 384       if (GetLastError() != ERROR_MORE_DATA) {
 385         WARN("ReadFile failed with error %ld\n", GetLastError());
 386         status = RPC_S_PROTOCOL_ERROR;
 387         goto fail;
 388       }
 389     }
 390     if (dwRead != data_length) {
 391       status = RPC_S_PROTOCOL_ERROR;
 392       goto fail;
 393     }
 394
 395     if (buffer_length == pMsg->BufferLength &&
 396         ((*Header)->common.flags & RPC_FLG_LAST) == 0) {
 397       status = RPC_S_PROTOCOL_ERROR;
 398       goto fail;
 399     }
 400
 401     buffer_length += data_length;
 402     if (buffer_length < pMsg->BufferLength) {
 403       TRACE("next header\n");
 404
 405       /* read the header of next packet */
 406       if (!ReadFile(Connection->conn, *Header, hdr_length, &dwRead, NULL)) {
 407         if (GetLastError() != ERROR_MORE_DATA) {
 408           WARN("ReadFile failed with error %ld\n", GetLastError());
 409           status = GetLastError();
 410           goto fail;
 411         }
 412       }
 413       if (dwRead != hdr_length) {
 414         WARN("invalid packet header size (%ld)\n", dwRead);
 415         status = RPC_S_PROTOCOL_ERROR;
 416         goto fail;
 417       }
 418
 419       buffer_ptr += data_length;
 420       first_flag = 0;
 421     }
 422   }
 423
 424   /* success */
 425   status = RPC_S_OK;
 426
 427 fail:
 428   if (status != RPC_S_OK && *Header) {
 429     RPCRT4_FreeHeader(*Header);
 430     *Header = NULL;
 431   }
 432   return status;
 433 }
 434
 435 /***********************************************************************
 436  *           I_RpcGetBuffer [RPCRT4.@]
 437  */
 438 RPC_STATUS WINAPI I_RpcGetBuffer(PRPC_MESSAGE pMsg)
 439 {
 440   RpcBinding* bind = (RpcBinding*)pMsg->Handle;
 441
 442   TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
 443   /* FIXME: pfnAllocate? */
 444   if (bind->server) {
 445     /* it turns out that the original buffer data must still be available
 446      * while the RPC server is marshalling a reply, so we should not deallocate
 447      * it, we'll leave deallocating the original buffer to the RPC server */
 448     pMsg->Buffer = HeapAlloc(GetProcessHeap(), 0, pMsg->BufferLength);
 449   } else {
 450     HeapFree(GetProcessHeap(), 0, pMsg->Buffer);
 451     pMsg->Buffer = HeapAlloc(GetProcessHeap(), 0, pMsg->BufferLength);
 452   }
 453   TRACE("Buffer=%p\n", pMsg->Buffer);
 454   /* FIXME: which errors to return? */
 455   return pMsg->Buffer ? S_OK : E_OUTOFMEMORY;
 456 }
 457
 458 /***********************************************************************
 459  *           I_RpcFreeBuffer [RPCRT4.@]
 460  */
 461 RPC_STATUS WINAPI I_RpcFreeBuffer(PRPC_MESSAGE pMsg)
 462 {
 463   TRACE("(%p) Buffer=%p\n", pMsg, pMsg->Buffer);
 464   /* FIXME: pfnFree? */
 465   HeapFree(GetProcessHeap(), 0, pMsg->Buffer);
 466   pMsg->Buffer = NULL;
 467   return S_OK;
 468 }
 469
 470 /***********************************************************************
 471  *           I_RpcSend [RPCRT4.@]
 472  */
 473 RPC_STATUS WINAPI I_RpcSend(PRPC_MESSAGE pMsg)
 474 {
 475   RpcBinding* bind = (RpcBinding*)pMsg->Handle;
 476   RpcConnection* conn;
 477   RPC_CLIENT_INTERFACE* cif = NULL;
 478   RPC_SERVER_INTERFACE* sif = NULL;
 479   RPC_STATUS status;
 480   RpcPktHdr *hdr;
 481
 482   TRACE("(%p)\n", pMsg);
 483   if (!bind) return RPC_S_INVALID_BINDING;
 484
 485   if (bind->server) {
 486     sif = pMsg->RpcInterfaceInformation;
 487     if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 488     status = RPCRT4_OpenBinding(bind, &conn, &sif->TransferSyntax,
 489                                 &sif->InterfaceId);
 490   } else {
 491     cif = pMsg->RpcInterfaceInformation;
 492     if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 493     status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
 494                                 &cif->InterfaceId);
 495   }
 496
 497   if (status != RPC_S_OK) return status;
 498
 499   if (bind->server) {
 500     if (pMsg->RpcFlags & WINE_RPCFLAG_EXCEPTION) {
 501       hdr = RPCRT4_BuildFaultHeader(pMsg->DataRepresentation,
 502                                     RPC_S_CALL_FAILED);
 503     } else {
 504       hdr = RPCRT4_BuildResponseHeader(pMsg->DataRepresentation,
 505                                        pMsg->BufferLength);
 506     }
 507   } else {
 508     hdr = RPCRT4_BuildRequestHeader(pMsg->DataRepresentation,
 509                                     pMsg->BufferLength, pMsg->ProcNum,
 510                                     &bind->ObjectUuid);
 511   }
 512
 513   status = RPCRT4_Send(conn, hdr, pMsg->Buffer, pMsg->BufferLength);
 514
 515   RPCRT4_FreeHeader(hdr);
 516
 517   /* success */
 518   if (!bind->server) {
 519     /* save the connection, so the response can be read from it */
 520     pMsg->ReservedForRuntime = conn;
 521     return RPC_S_OK;
 522   }
 523   RPCRT4_CloseBinding(bind, conn);
 524   status = RPC_S_OK;
 525
 526   return status;
 527 }
 528
 529 /***********************************************************************
 530  *           I_RpcReceive [RPCRT4.@]
 531  */
 532 RPC_STATUS WINAPI I_RpcReceive(PRPC_MESSAGE pMsg)
 533 {
 534   RpcBinding* bind = (RpcBinding*)pMsg->Handle;
 535   RpcConnection* conn;
 536   RPC_CLIENT_INTERFACE* cif = NULL;
 537   RPC_SERVER_INTERFACE* sif = NULL;
 538   RPC_STATUS status;
 539   RpcPktHdr *hdr = NULL;
 540
 541   TRACE("(%p)\n", pMsg);
 542   if (!bind) return RPC_S_INVALID_BINDING;
 543
 544   if (pMsg->ReservedForRuntime) {
 545     conn = pMsg->ReservedForRuntime;
 546     pMsg->ReservedForRuntime = NULL;
 547   } else {
 548     if (bind->server) {
 549       sif = pMsg->RpcInterfaceInformation;
 550       if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 551       status = RPCRT4_OpenBinding(bind, &conn, &sif->TransferSyntax,
 552                                   &sif->InterfaceId);
 553     } else {
 554       cif = pMsg->RpcInterfaceInformation;
 555       if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 556       status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
 557                                   &cif->InterfaceId);
 558     }
 559     if (status != RPC_S_OK) return status;
 560   }
 561
 562   status = RPCRT4_Receive(conn, &hdr, pMsg);
 563   if (status != RPC_S_OK) {
 564     WARN("receive failed with error %lx\n", status);
 565     goto fail;
 566   }
 567
 568   status = RPC_S_PROTOCOL_ERROR;
 569
 570   switch (hdr->common.ptype) {
 571   case PKT_RESPONSE:
 572     if (bind->server) goto fail;
 573     break;
 574   case PKT_REQUEST:
 575     if (!bind->server) goto fail;
 576     break;
 577   case PKT_FAULT:
 578     pMsg->RpcFlags |= WINE_RPCFLAG_EXCEPTION;
 579     ERR ("we got fault packet with status %lx\n", hdr->fault.status);
 580     status = RPC_S_CALL_FAILED; /* ? */
 581     goto fail;
 582   default:
 583     goto fail;
 584   }
 585
 586   /* success */
 587   status = RPC_S_OK;
 588
 589 fail:
 590   if (hdr) {
 591     RPCRT4_FreeHeader(hdr);
 592   }
 593   RPCRT4_CloseBinding(bind, conn);
 594   return status;
 595 }
 596
 597 /***********************************************************************
 598  *           I_RpcSendReceive [RPCRT4.@]
 599  */
 600 RPC_STATUS WINAPI I_RpcSendReceive(PRPC_MESSAGE pMsg)
 601 {
 602   RPC_STATUS status;
 603
 604   TRACE("(%p)\n", pMsg);
 605   status = I_RpcSend(pMsg);
 606   if (status == RPC_S_OK)
 607     status = I_RpcReceive(pMsg);
 608   return status;
 609 }