git.oblomov.eu Git - wine/blob - dlls/rpcrt4/rpc_message.c

   1 /*
   2  * RPC messages
   3  *
   4  * Copyright 2001-2002 Ove Kåven, TransGaming Technologies
   5  * Copyright 2004 Filip Navara
   6  * Copyright 2006 CodeWeavers
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include <stdarg.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "winerror.h"
  30
  31 #include "rpc.h"
  32 #include "rpcndr.h"
  33 #include "rpcdcep.h"
  34
  35 #include "wine/debug.h"
  36
  37 #include "rpc_binding.h"
  38 #include "rpc_defs.h"
  39 #include "rpc_message.h"
  40 #include "ncastatus.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(rpc);
  43
  44 /* note: the DCE/RPC spec says the alignment amount should be 4, but
  45  * MS/RPC servers seem to always use 16 */
  46 #define AUTH_ALIGNMENT 16
  47
  48 /* gets the amount needed to round a value up to the specified alignment */
  49 #define ROUND_UP_AMOUNT(value, alignment) \
  50     (((alignment) - (((value) % (alignment)))) % (alignment))
  51 #define ROUND_UP(value, alignment) (((value) + ((alignment) - 1)) & ~((alignment)-1))
  52
  53 enum secure_packet_direction
  54 {
  55   SECURE_PACKET_SEND,
  56   SECURE_PACKET_RECEIVE
  57 };
  58
  59 static RPC_STATUS I_RpcReAllocateBuffer(PRPC_MESSAGE pMsg);
  60
  61 static DWORD RPCRT4_GetHeaderSize(const RpcPktHdr *Header)
  62 {
  63   static const DWORD header_sizes[] = {
  64     sizeof(Header->request), 0, sizeof(Header->response),
  65     sizeof(Header->fault), 0, 0, 0, 0, 0, 0, 0, sizeof(Header->bind),
  66     sizeof(Header->bind_ack), sizeof(Header->bind_nack),
  67     0, 0, 0, 0, 0
  68   };
  69   ULONG ret = 0;
  70
  71   if (Header->common.ptype < sizeof(header_sizes) / sizeof(header_sizes[0])) {
  72     ret = header_sizes[Header->common.ptype];
  73     if (ret == 0)
  74       FIXME("unhandled packet type\n");
  75     if (Header->common.flags & RPC_FLG_OBJECT_UUID)
  76       ret += sizeof(UUID);
  77   } else {
  78     TRACE("invalid packet type\n");
  79   }
  80
  81   return ret;
  82 }
  83
  84 static int packet_has_body(const RpcPktHdr *Header)
  85 {
  86     return (Header->common.ptype == PKT_FAULT) ||
  87            (Header->common.ptype == PKT_REQUEST) ||
  88            (Header->common.ptype == PKT_RESPONSE);
  89 }
  90
  91 static int packet_has_auth_verifier(const RpcPktHdr *Header)
  92 {
  93     return !(Header->common.ptype == PKT_BIND_NACK) &&
  94            !(Header->common.ptype == PKT_SHUTDOWN);
  95 }
  96
  97 static VOID RPCRT4_BuildCommonHeader(RpcPktHdr *Header, unsigned char PacketType,
  98                               unsigned long DataRepresentation)
  99 {
 100   Header->common.rpc_ver = RPC_VER_MAJOR;
 101   Header->common.rpc_ver_minor = RPC_VER_MINOR;
 102   Header->common.ptype = PacketType;
 103   Header->common.drep[0] = LOBYTE(LOWORD(DataRepresentation));
 104   Header->common.drep[1] = HIBYTE(LOWORD(DataRepresentation));
 105   Header->common.drep[2] = LOBYTE(HIWORD(DataRepresentation));
 106   Header->common.drep[3] = HIBYTE(HIWORD(DataRepresentation));
 107   Header->common.auth_len = 0;
 108   Header->common.call_id = 1;
 109   Header->common.flags = 0;
 110   /* Flags and fragment length are computed in RPCRT4_Send. */
 111 }
 112
 113 static RpcPktHdr *RPCRT4_BuildRequestHeader(unsigned long DataRepresentation,
 114                                      unsigned long BufferLength,
 115                                      unsigned short ProcNum,
 116                                      UUID *ObjectUuid)
 117 {
 118   RpcPktHdr *header;
 119   BOOL has_object;
 120   RPC_STATUS status;
 121
 122   has_object = (ObjectUuid != NULL && !UuidIsNil(ObjectUuid, &status));
 123   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
 124                      sizeof(header->request) + (has_object ? sizeof(UUID) : 0));
 125   if (header == NULL) {
 126     return NULL;
 127   }
 128
 129   RPCRT4_BuildCommonHeader(header, PKT_REQUEST, DataRepresentation);
 130   header->common.frag_len = sizeof(header->request);
 131   header->request.alloc_hint = BufferLength;
 132   header->request.context_id = 0;
 133   header->request.opnum = ProcNum;
 134   if (has_object) {
 135     header->common.flags |= RPC_FLG_OBJECT_UUID;
 136     header->common.frag_len += sizeof(UUID);
 137     memcpy(&header->request + 1, ObjectUuid, sizeof(UUID));
 138   }
 139
 140   return header;
 141 }
 142
 143 RpcPktHdr *RPCRT4_BuildResponseHeader(unsigned long DataRepresentation,
 144                                       unsigned long BufferLength)
 145 {
 146   RpcPktHdr *header;
 147
 148   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->response));
 149   if (header == NULL) {
 150     return NULL;
 151   }
 152
 153   RPCRT4_BuildCommonHeader(header, PKT_RESPONSE, DataRepresentation);
 154   header->common.frag_len = sizeof(header->response);
 155   header->response.alloc_hint = BufferLength;
 156
 157   return header;
 158 }
 159
 160 RpcPktHdr *RPCRT4_BuildFaultHeader(unsigned long DataRepresentation,
 161                                    RPC_STATUS Status)
 162 {
 163   RpcPktHdr *header;
 164
 165   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->fault));
 166   if (header == NULL) {
 167     return NULL;
 168   }
 169
 170   RPCRT4_BuildCommonHeader(header, PKT_FAULT, DataRepresentation);
 171   header->common.frag_len = sizeof(header->fault);
 172   header->fault.status = Status;
 173
 174   return header;
 175 }
 176
 177 RpcPktHdr *RPCRT4_BuildBindHeader(unsigned long DataRepresentation,
 178                                   unsigned short MaxTransmissionSize,
 179                                   unsigned short MaxReceiveSize,
 180                                   unsigned long  AssocGroupId,
 181                                   const RPC_SYNTAX_IDENTIFIER *AbstractId,
 182                                   const RPC_SYNTAX_IDENTIFIER *TransferId)
 183 {
 184   RpcPktHdr *header;
 185
 186   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind));
 187   if (header == NULL) {
 188     return NULL;
 189   }
 190
 191   RPCRT4_BuildCommonHeader(header, PKT_BIND, DataRepresentation);
 192   header->common.frag_len = sizeof(header->bind);
 193   header->bind.max_tsize = MaxTransmissionSize;
 194   header->bind.max_rsize = MaxReceiveSize;
 195   header->bind.assoc_gid = AssocGroupId;
 196   header->bind.num_elements = 1;
 197   header->bind.num_syntaxes = 1;
 198   memcpy(&header->bind.abstract, AbstractId, sizeof(RPC_SYNTAX_IDENTIFIER));
 199   memcpy(&header->bind.transfer, TransferId, sizeof(RPC_SYNTAX_IDENTIFIER));
 200
 201   return header;
 202 }
 203
 204 static RpcPktHdr *RPCRT4_BuildAuthHeader(unsigned long DataRepresentation)
 205 {
 206   RpcPktHdr *header;
 207
 208   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
 209                      sizeof(header->common) + 12);
 210   if (header == NULL)
 211     return NULL;
 212
 213   RPCRT4_BuildCommonHeader(header, PKT_AUTH3, DataRepresentation);
 214   header->common.frag_len = 0x14;
 215   header->common.auth_len = 0;
 216
 217   return header;
 218 }
 219
 220 RpcPktHdr *RPCRT4_BuildBindNackHeader(unsigned long DataRepresentation,
 221                                       unsigned char RpcVersion,
 222                                       unsigned char RpcVersionMinor)
 223 {
 224   RpcPktHdr *header;
 225
 226   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(header->bind_nack));
 227   if (header == NULL) {
 228     return NULL;
 229   }
 230
 231   RPCRT4_BuildCommonHeader(header, PKT_BIND_NACK, DataRepresentation);
 232   header->common.frag_len = sizeof(header->bind_nack);
 233   header->bind_nack.reject_reason = REJECT_REASON_NOT_SPECIFIED;
 234   header->bind_nack.protocols_count = 1;
 235   header->bind_nack.protocols[0].rpc_ver = RpcVersion;
 236   header->bind_nack.protocols[0].rpc_ver_minor = RpcVersionMinor;
 237
 238   return header;
 239 }
 240
 241 RpcPktHdr *RPCRT4_BuildBindAckHeader(unsigned long DataRepresentation,
 242                                      unsigned short MaxTransmissionSize,
 243                                      unsigned short MaxReceiveSize,
 244                                      unsigned long AssocGroupId,
 245                                      LPCSTR ServerAddress,
 246                                      unsigned long Result,
 247                                      unsigned long Reason,
 248                                      const RPC_SYNTAX_IDENTIFIER *TransferId)
 249 {
 250   RpcPktHdr *header;
 251   unsigned long header_size;
 252   RpcAddressString *server_address;
 253   RpcResults *results;
 254   RPC_SYNTAX_IDENTIFIER *transfer_id;
 255
 256   header_size = sizeof(header->bind_ack) +
 257                 ROUND_UP(FIELD_OFFSET(RpcAddressString, string[strlen(ServerAddress) + 1]), 4) +
 258                 sizeof(RpcResults) +
 259                 sizeof(RPC_SYNTAX_IDENTIFIER);
 260
 261   header = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, header_size);
 262   if (header == NULL) {
 263     return NULL;
 264   }
 265
 266   RPCRT4_BuildCommonHeader(header, PKT_BIND_ACK, DataRepresentation);
 267   header->common.frag_len = header_size;
 268   header->bind_ack.max_tsize = MaxTransmissionSize;
 269   header->bind_ack.max_rsize = MaxReceiveSize;
 270   header->bind_ack.assoc_gid = AssocGroupId;
 271   server_address = (RpcAddressString*)(&header->bind_ack + 1);
 272   server_address->length = strlen(ServerAddress) + 1;
 273   strcpy(server_address->string, ServerAddress);
 274   /* results is 4-byte aligned */
 275   results = (RpcResults*)((ULONG_PTR)server_address + ROUND_UP(FIELD_OFFSET(RpcAddressString, string[server_address->length]), 4));
 276   results->num_results = 1;
 277   results->results[0].result = Result;
 278   results->results[0].reason = Reason;
 279   transfer_id = (RPC_SYNTAX_IDENTIFIER*)(results + 1);
 280   memcpy(transfer_id, TransferId, sizeof(RPC_SYNTAX_IDENTIFIER));
 281
 282   return header;
 283 }
 284
 285 VOID RPCRT4_FreeHeader(RpcPktHdr *Header)
 286 {
 287   HeapFree(GetProcessHeap(), 0, Header);
 288 }
 289
 290 NCA_STATUS RPC2NCA_STATUS(RPC_STATUS status)
 291 {
 292     switch (status)
 293     {
 294     case ERROR_INVALID_HANDLE:              return NCA_S_FAULT_CONTEXT_MISMATCH;
 295     case ERROR_OUTOFMEMORY:                 return NCA_S_FAULT_REMOTE_NO_MEMORY;
 296     case RPC_S_NOT_LISTENING:               return NCA_S_SERVER_TOO_BUSY;
 297     case RPC_S_UNKNOWN_IF:                  return NCA_S_UNK_IF;
 298     case RPC_S_SERVER_TOO_BUSY:             return NCA_S_SERVER_TOO_BUSY;
 299     case RPC_S_CALL_FAILED:                 return NCA_S_FAULT_UNSPEC;
 300     case RPC_S_CALL_FAILED_DNE:             return NCA_S_MANAGER_NOT_ENTERED;
 301     case RPC_S_PROTOCOL_ERROR:              return NCA_S_PROTO_ERROR;
 302     case RPC_S_UNSUPPORTED_TYPE:            return NCA_S_UNSUPPORTED_TYPE;
 303     case RPC_S_INVALID_TAG:                 return NCA_S_FAULT_INVALID_TAG;
 304     case RPC_S_INVALID_BOUND:               return NCA_S_FAULT_INVALID_BOUND;
 305     case RPC_S_PROCNUM_OUT_OF_RANGE:        return NCA_S_OP_RNG_ERROR;
 306     case RPC_X_SS_HANDLES_MISMATCH:         return NCA_S_FAULT_CONTEXT_MISMATCH;
 307     case RPC_S_CALL_CANCELLED:              return NCA_S_FAULT_CANCEL;
 308     case RPC_S_COMM_FAILURE:                return NCA_S_COMM_FAILURE;
 309     case RPC_X_WRONG_PIPE_ORDER:            return NCA_S_FAULT_PIPE_ORDER;
 310     case RPC_X_PIPE_CLOSED:                 return NCA_S_FAULT_PIPE_CLOSED;
 311     case RPC_X_PIPE_DISCIPLINE_ERROR:       return NCA_S_FAULT_PIPE_DISCIPLINE;
 312     case RPC_X_PIPE_EMPTY:                  return NCA_S_FAULT_PIPE_EMPTY;
 313     case STATUS_FLOAT_DIVIDE_BY_ZERO:       return NCA_S_FAULT_FP_DIV_ZERO;
 314     case STATUS_FLOAT_INVALID_OPERATION:    return NCA_S_FAULT_FP_ERROR;
 315     case STATUS_FLOAT_OVERFLOW:             return NCA_S_FAULT_FP_OVERFLOW;
 316     case STATUS_FLOAT_UNDERFLOW:            return NCA_S_FAULT_FP_UNDERFLOW;
 317     case STATUS_INTEGER_DIVIDE_BY_ZERO:     return NCA_S_FAULT_INT_DIV_BY_ZERO;
 318     case STATUS_INTEGER_OVERFLOW:           return NCA_S_FAULT_INT_OVERFLOW;
 319     default:                                return status;
 320     }
 321 }
 322
 323 RPC_STATUS NCA2RPC_STATUS(NCA_STATUS status)
 324 {
 325     switch (status)
 326     {
 327     case NCA_S_COMM_FAILURE:            return RPC_S_COMM_FAILURE;
 328     case NCA_S_OP_RNG_ERROR:            return RPC_S_PROCNUM_OUT_OF_RANGE;
 329     case NCA_S_UNK_IF:                  return RPC_S_UNKNOWN_IF;
 330     case NCA_S_YOU_CRASHED:             return RPC_S_CALL_FAILED;
 331     case NCA_S_PROTO_ERROR:             return RPC_S_PROTOCOL_ERROR;
 332     case NCA_S_OUT_ARGS_TOO_BIG:        return ERROR_NOT_ENOUGH_SERVER_MEMORY;
 333     case NCA_S_SERVER_TOO_BUSY:         return RPC_S_SERVER_TOO_BUSY;
 334     case NCA_S_UNSUPPORTED_TYPE:        return RPC_S_UNSUPPORTED_TYPE;
 335     case NCA_S_FAULT_INT_DIV_BY_ZERO:   return RPC_S_ZERO_DIVIDE;
 336     case NCA_S_FAULT_ADDR_ERROR:        return RPC_S_ADDRESS_ERROR;
 337     case NCA_S_FAULT_FP_DIV_ZERO:       return RPC_S_FP_DIV_ZERO;
 338     case NCA_S_FAULT_FP_UNDERFLOW:      return RPC_S_FP_UNDERFLOW;
 339     case NCA_S_FAULT_FP_OVERFLOW:       return RPC_S_FP_OVERFLOW;
 340     case NCA_S_FAULT_INVALID_TAG:       return RPC_S_INVALID_TAG;
 341     case NCA_S_FAULT_INVALID_BOUND:     return RPC_S_INVALID_BOUND;
 342     case NCA_S_RPC_VERSION_MISMATCH:    return RPC_S_PROTOCOL_ERROR;
 343     case NCA_S_UNSPEC_REJECT:           return RPC_S_CALL_FAILED_DNE;
 344     case NCA_S_BAD_ACTID:               return RPC_S_CALL_FAILED_DNE;
 345     case NCA_S_WHO_ARE_YOU_FAILED:      return RPC_S_CALL_FAILED;
 346     case NCA_S_MANAGER_NOT_ENTERED:     return RPC_S_CALL_FAILED_DNE;
 347     case NCA_S_FAULT_CANCEL:            return RPC_S_CALL_CANCELLED;
 348     case NCA_S_FAULT_ILL_INST:          return RPC_S_ADDRESS_ERROR;
 349     case NCA_S_FAULT_FP_ERROR:          return RPC_S_FP_OVERFLOW;
 350     case NCA_S_FAULT_INT_OVERFLOW:      return RPC_S_ADDRESS_ERROR;
 351     case NCA_S_FAULT_UNSPEC:            return RPC_S_CALL_FAILED;
 352     case NCA_S_FAULT_PIPE_EMPTY:        return RPC_X_PIPE_EMPTY;
 353     case NCA_S_FAULT_PIPE_CLOSED:       return RPC_X_PIPE_CLOSED;
 354     case NCA_S_FAULT_PIPE_ORDER:        return RPC_X_WRONG_PIPE_ORDER;
 355     case NCA_S_FAULT_PIPE_DISCIPLINE:   return RPC_X_PIPE_DISCIPLINE_ERROR;
 356     case NCA_S_FAULT_PIPE_COMM_ERROR:   return RPC_S_COMM_FAILURE;
 357     case NCA_S_FAULT_PIPE_MEMORY:       return ERROR_OUTOFMEMORY;
 358     case NCA_S_FAULT_CONTEXT_MISMATCH:  return ERROR_INVALID_HANDLE;
 359     case NCA_S_FAULT_REMOTE_NO_MEMORY:  return ERROR_NOT_ENOUGH_SERVER_MEMORY;
 360     default:                            return status;
 361     }
 362 }
 363
 364 static RPC_STATUS RPCRT4_SecurePacket(RpcConnection *Connection,
 365     enum secure_packet_direction dir,
 366     RpcPktHdr *hdr, unsigned int hdr_size,
 367     unsigned char *stub_data, unsigned int stub_data_size,
 368     RpcAuthVerifier *auth_hdr,
 369     unsigned char *auth_value, unsigned int auth_value_size)
 370 {
 371     SecBufferDesc message;
 372     SecBuffer buffers[4];
 373     SECURITY_STATUS sec_status;
 374
 375     message.ulVersion = SECBUFFER_VERSION;
 376     message.cBuffers = sizeof(buffers)/sizeof(buffers[0]);
 377     message.pBuffers = buffers;
 378
 379     buffers[0].cbBuffer = hdr_size;
 380     buffers[0].BufferType = SECBUFFER_DATA|SECBUFFER_READONLY_WITH_CHECKSUM;
 381     buffers[0].pvBuffer = hdr;
 382     buffers[1].cbBuffer = stub_data_size;
 383     buffers[1].BufferType = SECBUFFER_DATA;
 384     buffers[1].pvBuffer = stub_data;
 385     buffers[2].cbBuffer = sizeof(*auth_hdr);
 386     buffers[2].BufferType = SECBUFFER_DATA|SECBUFFER_READONLY_WITH_CHECKSUM;
 387     buffers[2].pvBuffer = auth_hdr;
 388     buffers[3].cbBuffer = auth_value_size;
 389     buffers[3].BufferType = SECBUFFER_TOKEN;
 390     buffers[3].pvBuffer = auth_value;
 391
 392     if (dir == SECURE_PACKET_SEND)
 393     {
 394         if ((auth_hdr->auth_level == RPC_C_AUTHN_LEVEL_PKT_PRIVACY) && packet_has_body(hdr))
 395         {
 396             sec_status = EncryptMessage(&Connection->ctx, 0, &message, 0 /* FIXME */);
 397             if (sec_status != SEC_E_OK)
 398             {
 399                 ERR("EncryptMessage failed with 0x%08x\n", sec_status);
 400                 return RPC_S_SEC_PKG_ERROR;
 401             }
 402         }
 403         else if (auth_hdr->auth_level != RPC_C_AUTHN_LEVEL_NONE)
 404         {
 405             sec_status = MakeSignature(&Connection->ctx, 0, &message, 0 /* FIXME */);
 406             if (sec_status != SEC_E_OK)
 407             {
 408                 ERR("MakeSignature failed with 0x%08x\n", sec_status);
 409                 return RPC_S_SEC_PKG_ERROR;
 410             }
 411         }
 412     }
 413     else if (dir == SECURE_PACKET_RECEIVE)
 414     {
 415         if ((auth_hdr->auth_level == RPC_C_AUTHN_LEVEL_PKT_PRIVACY) && packet_has_body(hdr))
 416         {
 417             sec_status = DecryptMessage(&Connection->ctx, &message, 0 /* FIXME */, 0);
 418             if (sec_status != SEC_E_OK)
 419             {
 420                 ERR("DecryptMessage failed with 0x%08x\n", sec_status);
 421                 return RPC_S_SEC_PKG_ERROR;
 422             }
 423         }
 424         else if (auth_hdr->auth_level != RPC_C_AUTHN_LEVEL_NONE)
 425         {
 426             sec_status = VerifySignature(&Connection->ctx, &message, 0 /* FIXME */, NULL);
 427             if (sec_status != SEC_E_OK)
 428             {
 429                 ERR("VerifySignature failed with 0x%08x\n", sec_status);
 430                 return RPC_S_SEC_PKG_ERROR;
 431             }
 432         }
 433     }
 434
 435     return RPC_S_OK;
 436 }
 437
 438 /***********************************************************************
 439  *           RPCRT4_SendAuth (internal)
 440  *
 441  * Transmit a packet with authorization data over connection in acceptable fragments.
 442  */
 443 static RPC_STATUS RPCRT4_SendAuth(RpcConnection *Connection, RpcPktHdr *Header,
 444                                   void *Buffer, unsigned int BufferLength,
 445                                   const void *Auth, unsigned int AuthLength)
 446 {
 447   PUCHAR buffer_pos;
 448   DWORD hdr_size;
 449   LONG count;
 450   unsigned char *pkt;
 451   LONG alen;
 452   RPC_STATUS status;
 453
 454   RPCRT4_SetThreadCurrentConnection(Connection);
 455
 456   buffer_pos = Buffer;
 457   /* The packet building functions save the packet header size, so we can use it. */
 458   hdr_size = Header->common.frag_len;
 459   if (AuthLength)
 460     Header->common.auth_len = AuthLength;
 461   else if (Connection->AuthInfo && packet_has_auth_verifier(Header))
 462   {
 463     if ((Connection->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_PRIVACY) && packet_has_body(Header))
 464       Header->common.auth_len = Connection->encryption_auth_len;
 465     else
 466       Header->common.auth_len = Connection->signature_auth_len;
 467   }
 468   else
 469     Header->common.auth_len = 0;
 470   Header->common.flags |= RPC_FLG_FIRST;
 471   Header->common.flags &= ~RPC_FLG_LAST;
 472
 473   alen = RPC_AUTH_VERIFIER_LEN(&Header->common);
 474
 475   while (!(Header->common.flags & RPC_FLG_LAST)) {
 476     unsigned char auth_pad_len = Header->common.auth_len ? ROUND_UP_AMOUNT(BufferLength, AUTH_ALIGNMENT) : 0;
 477     unsigned int pkt_size = BufferLength + hdr_size + alen + auth_pad_len;
 478
 479     /* decide if we need to split the packet into fragments */
 480    if (pkt_size <= Connection->MaxTransmissionSize) {
 481      Header->common.flags |= RPC_FLG_LAST;
 482      Header->common.frag_len = pkt_size;
 483     } else {
 484       auth_pad_len = 0;
 485       /* make sure packet payload will be a multiple of 16 */
 486       Header->common.frag_len =
 487         ((Connection->MaxTransmissionSize - hdr_size - alen) & ~(AUTH_ALIGNMENT-1)) +
 488         hdr_size + alen;
 489     }
 490
 491     pkt = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, Header->common.frag_len);
 492
 493     memcpy(pkt, Header, hdr_size);
 494
 495     /* fragment consisted of header only and is the last one */
 496     if (hdr_size == Header->common.frag_len)
 497       goto write;
 498
 499     memcpy(pkt + hdr_size, buffer_pos, Header->common.frag_len - hdr_size - auth_pad_len - alen);
 500
 501     /* add the authorization info */
 502     if (Connection->AuthInfo && packet_has_auth_verifier(Header))
 503     {
 504       RpcAuthVerifier *auth_hdr = (RpcAuthVerifier *)&pkt[Header->common.frag_len - alen];
 505
 506       auth_hdr->auth_type = Connection->AuthInfo->AuthnSvc;
 507       auth_hdr->auth_level = Connection->AuthInfo->AuthnLevel;
 508       auth_hdr->auth_pad_length = auth_pad_len;
 509       auth_hdr->auth_reserved = 0;
 510       /* a unique number... */
 511       auth_hdr->auth_context_id = (unsigned long)Connection;
 512
 513       if (AuthLength)
 514         memcpy(auth_hdr + 1, Auth, AuthLength);
 515       else
 516       {
 517         status = RPCRT4_SecurePacket(Connection, SECURE_PACKET_SEND,
 518             (RpcPktHdr *)pkt, hdr_size,
 519             pkt + hdr_size, Header->common.frag_len - hdr_size - alen,
 520             auth_hdr,
 521             (unsigned char *)(auth_hdr + 1), Header->common.auth_len);
 522         if (status != RPC_S_OK)
 523         {
 524           HeapFree(GetProcessHeap(), 0, pkt);
 525           RPCRT4_SetThreadCurrentConnection(NULL);
 526           return status;
 527         }
 528       }
 529     }
 530
 531 write:
 532     count = rpcrt4_conn_write(Connection, pkt, Header->common.frag_len);
 533     HeapFree(GetProcessHeap(), 0, pkt);
 534     if (count<0) {
 535       WARN("rpcrt4_conn_write failed (auth)\n");
 536       RPCRT4_SetThreadCurrentConnection(NULL);
 537       return RPC_S_CALL_FAILED;
 538     }
 539
 540     buffer_pos += Header->common.frag_len - hdr_size - alen - auth_pad_len;
 541     BufferLength -= Header->common.frag_len - hdr_size - alen - auth_pad_len;
 542     Header->common.flags &= ~RPC_FLG_FIRST;
 543   }
 544
 545   RPCRT4_SetThreadCurrentConnection(NULL);
 546   return RPC_S_OK;
 547 }
 548
 549 /***********************************************************************
 550  *           RPCRT4_ClientAuthorize (internal)
 551  *
 552  * Authorize a client connection. A NULL in param signifies a new connection.
 553  */
 554 static RPC_STATUS RPCRT4_ClientAuthorize(RpcConnection *conn, SecBuffer *in,
 555                                          SecBuffer *out)
 556 {
 557   SECURITY_STATUS r;
 558   SecBufferDesc out_desc;
 559   SecBufferDesc inp_desc;
 560   SecPkgContext_Sizes secctx_sizes;
 561   BOOL continue_needed;
 562   ULONG context_req = ISC_REQ_CONNECTION | ISC_REQ_USE_DCE_STYLE |
 563                       ISC_REQ_MUTUAL_AUTH | ISC_REQ_DELEGATE;
 564
 565   if (conn->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_INTEGRITY)
 566     context_req |= ISC_REQ_INTEGRITY;
 567   else if (conn->AuthInfo->AuthnLevel == RPC_C_AUTHN_LEVEL_PKT_PRIVACY)
 568     context_req |= ISC_REQ_CONFIDENTIALITY | ISC_REQ_INTEGRITY;
 569
 570   out->BufferType = SECBUFFER_TOKEN;
 571   out->cbBuffer = conn->AuthInfo->cbMaxToken;
 572   out->pvBuffer = HeapAlloc(GetProcessHeap(), 0, out->cbBuffer);
 573   if (!out->pvBuffer) return ERROR_OUTOFMEMORY;
 574
 575   out_desc.ulVersion = 0;
 576   out_desc.cBuffers = 1;
 577   out_desc.pBuffers = out;
 578
 579   inp_desc.cBuffers = 1;
 580   inp_desc.pBuffers = in;
 581   inp_desc.ulVersion = 0;
 582
 583   r = InitializeSecurityContextA(&conn->AuthInfo->cred, in ? &conn->ctx : NULL,
 584         NULL, context_req, 0, SECURITY_NETWORK_DREP,
 585         in ? &inp_desc : NULL, 0, &conn->ctx, &out_desc, &conn->attr,
 586         &conn->exp);
 587   if (FAILED(r))
 588   {
 589       WARN("InitializeSecurityContext failed with error 0x%08x\n", r);
 590       goto failed;
 591   }
 592
 593   TRACE("r = 0x%08x, attr = 0x%08x\n", r, conn->attr);
 594   continue_needed = ((r == SEC_I_CONTINUE_NEEDED) ||
 595                      (r == SEC_I_COMPLETE_AND_CONTINUE));
 596
 597   if ((r == SEC_I_COMPLETE_NEEDED) || (r == SEC_I_COMPLETE_AND_CONTINUE))
 598   {
 599       TRACE("complete needed\n");
 600       r = CompleteAuthToken(&conn->ctx, &out_desc);
 601       if (FAILED(r))
 602       {
 603           WARN("CompleteAuthToken failed with error 0x%08x\n", r);
 604           goto failed;
 605       }
 606   }
 607
 608   TRACE("cbBuffer = %ld\n", out->cbBuffer);
 609
 610   if (!continue_needed)
 611   {
 612       r = QueryContextAttributesA(&conn->ctx, SECPKG_ATTR_SIZES, &secctx_sizes);
 613       if (FAILED(r))
 614       {
 615           WARN("QueryContextAttributes failed with error 0x%08x\n", r);
 616           goto failed;
 617       }
 618       conn->signature_auth_len = secctx_sizes.cbMaxSignature;
 619       conn->encryption_auth_len = secctx_sizes.cbSecurityTrailer;
 620   }
 621
 622   return RPC_S_OK;
 623
 624 failed:
 625   HeapFree(GetProcessHeap(), 0, out->pvBuffer);
 626   out->pvBuffer = NULL;
 627   return ERROR_ACCESS_DENIED; /* FIXME: is this correct? */
 628 }
 629
 630 /***********************************************************************
 631  *           RPCRT4_AuthorizeBinding (internal)
 632  */
 633 static RPC_STATUS RPCRT_AuthorizeConnection(RpcConnection* conn,
 634                                             BYTE *challenge, ULONG count)
 635 {
 636   SecBuffer inp, out;
 637   RpcPktHdr *resp_hdr;
 638   RPC_STATUS status;
 639
 640   TRACE("challenge %s, %d bytes\n", challenge, count);
 641
 642   inp.BufferType = SECBUFFER_TOKEN;
 643   inp.pvBuffer = challenge;
 644   inp.cbBuffer = count;
 645
 646   status = RPCRT4_ClientAuthorize(conn, &inp, &out);
 647   if (status) return status;
 648
 649   resp_hdr = RPCRT4_BuildAuthHeader(NDR_LOCAL_DATA_REPRESENTATION);
 650   if (!resp_hdr)
 651     return E_OUTOFMEMORY;
 652
 653   status = RPCRT4_SendAuth(conn, resp_hdr, NULL, 0, out.pvBuffer, out.cbBuffer);
 654
 655   HeapFree(GetProcessHeap(), 0, out.pvBuffer);
 656   RPCRT4_FreeHeader(resp_hdr);
 657
 658   return status;
 659 }
 660
 661 /***********************************************************************
 662  *           RPCRT4_Send (internal)
 663  *
 664  * Transmit a packet over connection in acceptable fragments.
 665  */
 666 RPC_STATUS RPCRT4_Send(RpcConnection *Connection, RpcPktHdr *Header,
 667                        void *Buffer, unsigned int BufferLength)
 668 {
 669   RPC_STATUS r;
 670   SecBuffer out;
 671
 672   if (!Connection->AuthInfo || SecIsValidHandle(&Connection->ctx))
 673   {
 674     return RPCRT4_SendAuth(Connection, Header, Buffer, BufferLength, NULL, 0);
 675   }
 676
 677   /* tack on a negotiate packet */
 678   RPCRT4_ClientAuthorize(Connection, NULL, &out);
 679   r = RPCRT4_SendAuth(Connection, Header, Buffer, BufferLength, out.pvBuffer, out.cbBuffer);
 680   HeapFree(GetProcessHeap(), 0, out.pvBuffer);
 681
 682   return r;
 683 }
 684
 685 /***********************************************************************
 686  *           RPCRT4_Receive (internal)
 687  *
 688  * Receive a packet from connection and merge the fragments.
 689  */
 690 RPC_STATUS RPCRT4_Receive(RpcConnection *Connection, RpcPktHdr **Header,
 691                           PRPC_MESSAGE pMsg)
 692 {
 693   RPC_STATUS status;
 694   DWORD hdr_length;
 695   LONG dwRead;
 696   unsigned short first_flag;
 697   unsigned long data_length;
 698   unsigned long buffer_length;
 699   unsigned long auth_length;
 700   unsigned char *auth_data = NULL;
 701   RpcPktCommonHdr common_hdr;
 702
 703   *Header = NULL;
 704
 705   TRACE("(%p, %p, %p)\n", Connection, Header, pMsg);
 706
 707   RPCRT4_SetThreadCurrentConnection(Connection);
 708
 709   /* read packet common header */
 710   dwRead = rpcrt4_conn_read(Connection, &common_hdr, sizeof(common_hdr));
 711   if (dwRead != sizeof(common_hdr)) {
 712     WARN("Short read of header, %d bytes\n", dwRead);
 713     status = RPC_S_CALL_FAILED;
 714     goto fail;
 715   }
 716
 717   /* verify if the header really makes sense */
 718   if (common_hdr.rpc_ver != RPC_VER_MAJOR ||
 719       common_hdr.rpc_ver_minor != RPC_VER_MINOR) {
 720     WARN("unhandled packet version\n");
 721     status = RPC_S_PROTOCOL_ERROR;
 722     goto fail;
 723   }
 724
 725   hdr_length = RPCRT4_GetHeaderSize((RpcPktHdr*)&common_hdr);
 726   if (hdr_length == 0) {
 727     WARN("header length == 0\n");
 728     status = RPC_S_PROTOCOL_ERROR;
 729     goto fail;
 730   }
 731
 732   *Header = HeapAlloc(GetProcessHeap(), 0, hdr_length);
 733   memcpy(*Header, &common_hdr, sizeof(common_hdr));
 734
 735   /* read the rest of packet header */
 736   dwRead = rpcrt4_conn_read(Connection, &(*Header)->common + 1, hdr_length - sizeof(common_hdr));
 737   if (dwRead != hdr_length - sizeof(common_hdr)) {
 738     WARN("bad header length, %d bytes, hdr_length %d\n", dwRead, hdr_length);
 739     status = RPC_S_CALL_FAILED;
 740     goto fail;
 741   }
 742
 743   /* read packet body */
 744   switch (common_hdr.ptype) {
 745   case PKT_RESPONSE:
 746     pMsg->BufferLength = (*Header)->response.alloc_hint;
 747     break;
 748   case PKT_REQUEST:
 749     pMsg->BufferLength = (*Header)->request.alloc_hint;
 750     break;
 751   default:
 752     pMsg->BufferLength = common_hdr.frag_len - hdr_length - RPC_AUTH_VERIFIER_LEN(&common_hdr);
 753   }
 754
 755   TRACE("buffer length = %u\n", pMsg->BufferLength);
 756
 757   status = I_RpcGetBuffer(pMsg);
 758   if (status != RPC_S_OK) goto fail;
 759
 760   first_flag = RPC_FLG_FIRST;
 761   auth_length = common_hdr.auth_len;
 762   if (auth_length) {
 763     auth_data = HeapAlloc(GetProcessHeap(), 0, RPC_AUTH_VERIFIER_LEN(&common_hdr));
 764     if (!auth_data) {
 765       status = RPC_S_OUT_OF_RESOURCES;
 766       goto fail;
 767     }
 768   }
 769   buffer_length = 0;
 770   while (TRUE)
 771   {
 772     unsigned int header_auth_len = RPC_AUTH_VERIFIER_LEN(&(*Header)->common);
 773
 774     /* verify header fields */
 775
 776     if (((*Header)->common.frag_len < hdr_length) ||
 777         ((*Header)->common.frag_len - hdr_length < header_auth_len)) {
 778       WARN("frag_len %d too small for hdr_length %d and auth_len %d\n",
 779         (*Header)->common.frag_len, hdr_length, header_auth_len);
 780       status = RPC_S_PROTOCOL_ERROR;
 781       goto fail;
 782     }
 783
 784     if ((*Header)->common.auth_len != auth_length) {
 785       WARN("auth_len header field changed from %ld to %d\n",
 786         auth_length, (*Header)->common.auth_len);
 787       status = RPC_S_PROTOCOL_ERROR;
 788       goto fail;
 789     }
 790
 791     if (((*Header)->common.flags & RPC_FLG_FIRST) != first_flag) {
 792       TRACE("invalid packet flags\n");
 793       status = RPC_S_PROTOCOL_ERROR;
 794       goto fail;
 795     }
 796
 797     data_length = (*Header)->common.frag_len - hdr_length - header_auth_len;
 798     if (data_length + buffer_length > pMsg->BufferLength) {
 799       TRACE("allocation hint exceeded, new buffer length = %ld\n",
 800         data_length + buffer_length);
 801       pMsg->BufferLength = data_length + buffer_length;
 802       status = I_RpcReAllocateBuffer(pMsg);
 803       if (status != RPC_S_OK) goto fail;
 804     }
 805
 806     if (data_length == 0) dwRead = 0; else
 807     dwRead = rpcrt4_conn_read(Connection,
 808         (unsigned char *)pMsg->Buffer + buffer_length, data_length);
 809     if (dwRead != data_length) {
 810       WARN("bad data length, %d/%ld\n", dwRead, data_length);
 811       status = RPC_S_CALL_FAILED;
 812       goto fail;
 813     }
 814
 815     if (header_auth_len) {
 816       if (header_auth_len < sizeof(RpcAuthVerifier)) {
 817         WARN("bad auth verifier length %d\n", header_auth_len);
 818         status = RPC_S_PROTOCOL_ERROR;
 819         goto fail;
 820       }
 821
 822       /* FIXME: we should accumulate authentication data for the bind,
 823        * bind_ack, alter_context and alter_context_response if necessary.
 824        * however, the details of how this is done is very sketchy in the
 825        * DCE/RPC spec. for all other packet types that have authentication
 826        * verifier data then it is just duplicated in all the fragments */
 827       dwRead = rpcrt4_conn_read(Connection, auth_data, header_auth_len);
 828       if (dwRead != header_auth_len) {
 829         WARN("bad authentication data length, %d/%d\n", dwRead,
 830           header_auth_len);
 831         status = RPC_S_CALL_FAILED;
 832         goto fail;
 833       }
 834
 835       /* these packets are handled specially, not by the generic SecurePacket
 836        * function */
 837       if ((common_hdr.ptype != PKT_BIND) &&
 838           (common_hdr.ptype != PKT_BIND_ACK) &&
 839           (common_hdr.ptype != PKT_AUTH3))
 840       {
 841         status = RPCRT4_SecurePacket(Connection, SECURE_PACKET_RECEIVE,
 842             *Header, hdr_length,
 843             (unsigned char *)pMsg->Buffer + buffer_length, data_length,
 844             (RpcAuthVerifier *)auth_data,
 845             (unsigned char *)auth_data + sizeof(RpcAuthVerifier),
 846             header_auth_len - sizeof(RpcAuthVerifier));
 847         if (status != RPC_S_OK) goto fail;
 848       }
 849     }
 850
 851     buffer_length += data_length;
 852     if (!((*Header)->common.flags & RPC_FLG_LAST)) {
 853       TRACE("next header\n");
 854
 855       /* read the header of next packet */
 856       dwRead = rpcrt4_conn_read(Connection, *Header, hdr_length);
 857       if (dwRead != hdr_length) {
 858         WARN("invalid packet header size (%d)\n", dwRead);
 859         status = RPC_S_CALL_FAILED;
 860         goto fail;
 861       }
 862
 863       first_flag = 0;
 864     } else {
 865       break;
 866     }
 867   }
 868   pMsg->BufferLength = buffer_length;
 869
 870   /* respond to authorization request */
 871   if (common_hdr.ptype == PKT_BIND_ACK && auth_length > sizeof(RpcAuthVerifier))
 872   {
 873     status = RPCRT_AuthorizeConnection(Connection,
 874                                        auth_data + sizeof(RpcAuthVerifier),
 875                                        auth_length);
 876     if (status)
 877         goto fail;
 878   }
 879
 880   /* success */
 881   status = RPC_S_OK;
 882
 883 fail:
 884   RPCRT4_SetThreadCurrentConnection(NULL);
 885   if (status != RPC_S_OK) {
 886     RPCRT4_FreeHeader(*Header);
 887     *Header = NULL;
 888   }
 889   HeapFree(GetProcessHeap(), 0, auth_data);
 890   return status;
 891 }
 892
 893 /***********************************************************************
 894  *           I_RpcGetBuffer [RPCRT4.@]
 895  *
 896  * Allocates a buffer for use by I_RpcSend or I_RpcSendReceive and binds to the
 897  * server interface.
 898  *
 899  * PARAMS
 900  *  pMsg [I/O] RPC message information.
 901  *
 902  * RETURNS
 903  *  Success: RPC_S_OK.
 904  *  Failure: RPC_S_INVALID_BINDING if pMsg->Handle is invalid.
 905  *           RPC_S_SERVER_UNAVAILABLE if unable to connect to server.
 906  *           ERROR_OUTOFMEMORY if buffer allocation failed.
 907  *
 908  * NOTES
 909  *  The pMsg->BufferLength field determines the size of the buffer to allocate,
 910  *  in bytes.
 911  *
 912  *  Use I_RpcFreeBuffer() to unbind from the server and free the message buffer.
 913  *
 914  * SEE ALSO
 915  *  I_RpcFreeBuffer(), I_RpcSend(), I_RpcReceive(), I_RpcSendReceive().
 916  */
 917 RPC_STATUS WINAPI I_RpcGetBuffer(PRPC_MESSAGE pMsg)
 918 {
 919   TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
 920   pMsg->Buffer = HeapAlloc(GetProcessHeap(), 0, pMsg->BufferLength);
 921
 922   TRACE("Buffer=%p\n", pMsg->Buffer);
 923   return pMsg->Buffer ? RPC_S_OK : ERROR_OUTOFMEMORY;
 924 }
 925
 926 /***********************************************************************
 927  *           I_RpcReAllocateBuffer (internal)
 928  */
 929 static RPC_STATUS I_RpcReAllocateBuffer(PRPC_MESSAGE pMsg)
 930 {
 931   TRACE("(%p): BufferLength=%d\n", pMsg, pMsg->BufferLength);
 932   pMsg->Buffer = HeapReAlloc(GetProcessHeap(), 0, pMsg->Buffer, pMsg->BufferLength);
 933
 934   TRACE("Buffer=%p\n", pMsg->Buffer);
 935   return pMsg->Buffer ? RPC_S_OK : ERROR_OUTOFMEMORY;
 936 }
 937
 938 /***********************************************************************
 939  *           I_RpcFreeBuffer [RPCRT4.@]
 940  *
 941  * Frees a buffer allocated by I_RpcGetBuffer or I_RpcReceive and unbinds from
 942  * the server interface.
 943  *
 944  * PARAMS
 945  *  pMsg [I/O] RPC message information.
 946  *
 947  * RETURNS
 948  *  RPC_S_OK.
 949  *
 950  * SEE ALSO
 951  *  I_RpcGetBuffer(), I_RpcReceive().
 952  */
 953 RPC_STATUS WINAPI I_RpcFreeBuffer(PRPC_MESSAGE pMsg)
 954 {
 955   TRACE("(%p) Buffer=%p\n", pMsg, pMsg->Buffer);
 956   HeapFree(GetProcessHeap(), 0, pMsg->Buffer);
 957   return RPC_S_OK;
 958 }
 959
 960 /***********************************************************************
 961  *           I_RpcSend [RPCRT4.@]
 962  *
 963  * Sends a message to the server.
 964  *
 965  * PARAMS
 966  *  pMsg [I/O] RPC message information.
 967  *
 968  * RETURNS
 969  *  Unknown.
 970  *
 971  * NOTES
 972  *  The buffer must have been allocated with I_RpcGetBuffer().
 973  *
 974  * SEE ALSO
 975  *  I_RpcGetBuffer(), I_RpcReceive(), I_RpcSendReceive().
 976  */
 977 RPC_STATUS WINAPI I_RpcSend(PRPC_MESSAGE pMsg)
 978 {
 979   RpcBinding* bind = (RpcBinding*)pMsg->Handle;
 980   RpcConnection* conn;
 981   RPC_CLIENT_INTERFACE* cif = NULL;
 982   RPC_STATUS status;
 983   RpcPktHdr *hdr;
 984
 985   TRACE("(%p)\n", pMsg);
 986   if (!bind || bind->server) return RPC_S_INVALID_BINDING;
 987
 988   cif = pMsg->RpcInterfaceInformation;
 989   if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
 990
 991   if (!bind->Endpoint || !bind->Endpoint[0])
 992   {
 993     TRACE("automatically resolving partially bound binding\n");
 994     status = RpcEpResolveBinding(bind, cif);
 995     if (status != RPC_S_OK) return status;
 996   }
 997
 998   status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
 999                               &cif->InterfaceId);
1000   if (status != RPC_S_OK) return status;
1001
1002   hdr = RPCRT4_BuildRequestHeader(pMsg->DataRepresentation,
1003                                   pMsg->BufferLength,
1004                                   pMsg->ProcNum & ~RPC_FLAGS_VALID_BIT,
1005                                   &bind->ObjectUuid);
1006   if (!hdr)
1007   {
1008     RPCRT4_CloseBinding(bind, conn);
1009     return ERROR_OUTOFMEMORY;
1010   }
1011   hdr->common.call_id = conn->NextCallId++;
1012
1013   status = RPCRT4_Send(conn, hdr, pMsg->Buffer, pMsg->BufferLength);
1014
1015   RPCRT4_FreeHeader(hdr);
1016
1017   /* save the connection, so the response can be read from it */
1018   pMsg->ReservedForRuntime = conn;
1019   return status;
1020 }
1021
1022 /* is this status something that the server can't recover from? */
1023 static inline BOOL is_hard_error(RPC_STATUS status)
1024 {
1025     switch (status)
1026     {
1027     case 0: /* user-defined fault */
1028     case ERROR_ACCESS_DENIED:
1029     case ERROR_INVALID_PARAMETER:
1030     case RPC_S_PROTOCOL_ERROR:
1031     case RPC_S_CALL_FAILED:
1032     case RPC_S_CALL_FAILED_DNE:
1033     case RPC_S_SEC_PKG_ERROR:
1034         return TRUE;
1035     default:
1036         return FALSE;
1037     }
1038 }
1039
1040 /***********************************************************************
1041  *           I_RpcReceive [RPCRT4.@]
1042  */
1043 RPC_STATUS WINAPI I_RpcReceive(PRPC_MESSAGE pMsg)
1044 {
1045   RpcBinding* bind = (RpcBinding*)pMsg->Handle;
1046   RpcConnection* conn;
1047   RPC_CLIENT_INTERFACE* cif = NULL;
1048   RPC_SERVER_INTERFACE* sif = NULL;
1049   RPC_STATUS status;
1050   RpcPktHdr *hdr = NULL;
1051
1052   TRACE("(%p)\n", pMsg);
1053   if (!bind) return RPC_S_INVALID_BINDING;
1054
1055   if (pMsg->ReservedForRuntime) {
1056     conn = pMsg->ReservedForRuntime;
1057     pMsg->ReservedForRuntime = NULL;
1058   } else {
1059     if (bind->server) {
1060       sif = pMsg->RpcInterfaceInformation;
1061       if (!sif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
1062       status = RPCRT4_OpenBinding(bind, &conn, &sif->TransferSyntax,
1063                                   &sif->InterfaceId);
1064     } else {
1065       cif = pMsg->RpcInterfaceInformation;
1066       if (!cif) return RPC_S_INTERFACE_NOT_FOUND; /* ? */
1067
1068       if (!bind->Endpoint || !bind->Endpoint[0])
1069       {
1070         TRACE("automatically resolving partially bound binding\n");
1071         status = RpcEpResolveBinding(bind, cif);
1072         if (status != RPC_S_OK) return status;
1073       }
1074
1075       status = RPCRT4_OpenBinding(bind, &conn, &cif->TransferSyntax,
1076                                   &cif->InterfaceId);
1077     }
1078     if (status != RPC_S_OK) return status;
1079   }
1080
1081   status = RPCRT4_Receive(conn, &hdr, pMsg);
1082   if (status != RPC_S_OK) {
1083     WARN("receive failed with error %lx\n", status);
1084     goto fail;
1085   }
1086
1087   switch (hdr->common.ptype) {
1088   case PKT_RESPONSE:
1089     if (bind->server) {
1090         status = RPC_S_PROTOCOL_ERROR;
1091         goto fail;
1092     }
1093     break;
1094   case PKT_REQUEST:
1095     if (!bind->server) {
1096         status = RPC_S_PROTOCOL_ERROR;
1097         goto fail;
1098     }
1099     break;
1100   case PKT_FAULT:
1101     ERR ("we got fault packet with status 0x%lx\n", hdr->fault.status);
1102     status = NCA2RPC_STATUS(hdr->fault.status);
1103     if (is_hard_error(status))
1104         goto fail;
1105     break;
1106   default:
1107     WARN("bad packet type %d\n", hdr->common.ptype);
1108     status = RPC_S_PROTOCOL_ERROR;
1109     goto fail;
1110   }
1111
1112   /* success */
1113   RPCRT4_CloseBinding(bind, conn);
1114   RPCRT4_FreeHeader(hdr);
1115   return status;
1116
1117 fail:
1118   RPCRT4_FreeHeader(hdr);
1119   RPCRT4_DestroyConnection(conn);
1120   return status;
1121 }
1122
1123 /***********************************************************************
1124  *           I_RpcSendReceive [RPCRT4.@]
1125  *
1126  * Sends a message to the server and receives the response.
1127  *
1128  * PARAMS
1129  *  pMsg [I/O] RPC message information.
1130  *
1131  * RETURNS
1132  *  Success: RPC_S_OK.
1133  *  Failure: Any error code.
1134  *
1135  * NOTES
1136  *  The buffer must have been allocated with I_RpcGetBuffer().
1137  *
1138  * SEE ALSO
1139  *  I_RpcGetBuffer(), I_RpcSend(), I_RpcReceive().
1140  */
1141 RPC_STATUS WINAPI I_RpcSendReceive(PRPC_MESSAGE pMsg)
1142 {
1143   RPC_STATUS status;
1144   RPC_MESSAGE original_message;
1145
1146   TRACE("(%p)\n", pMsg);
1147
1148   original_message = *pMsg;
1149   status = I_RpcSend(pMsg);
1150   if (status == RPC_S_OK)
1151     status = I_RpcReceive(pMsg);
1152   /* free the buffer replaced by a new buffer in I_RpcReceive */
1153   if (status == RPC_S_OK)
1154     I_RpcFreeBuffer(&original_message);
1155   return status;
1156 }
1157
1158 /***********************************************************************
1159  *           I_RpcAsyncSetHandle [RPCRT4.@]
1160  *
1161  * Sets the asynchronous state of the handle contained in the RPC message
1162  * structure.
1163  *
1164  * PARAMS
1165  *  pMsg   [I] RPC Message structure.
1166  *  pAsync [I] Asynchronous state to set.
1167  *
1168  * RETURNS
1169  *  Success: RPC_S_OK.
1170  *  Failure: Any error code.
1171  */
1172 RPC_STATUS WINAPI I_RpcAsyncSetHandle(PRPC_MESSAGE pMsg, PRPC_ASYNC_STATE pAsync)
1173 {
1174     FIXME("(%p, %p): stub\n", pMsg, pAsync);
1175     return RPC_S_INVALID_BINDING;
1176 }
1177
1178 /***********************************************************************
1179  *           I_RpcAsyncAbortCall [RPCRT4.@]
1180  *
1181  * Aborts an asynchronous call.
1182  *
1183  * PARAMS
1184  *  pAsync        [I] Asynchronous state.
1185  *  ExceptionCode [I] Exception code.
1186  *
1187  * RETURNS
1188  *  Success: RPC_S_OK.
1189  *  Failure: Any error code.
1190  */
1191 RPC_STATUS WINAPI I_RpcAsyncAbortCall(PRPC_ASYNC_STATE pAsync, ULONG ExceptionCode)
1192 {
1193     FIXME("(%p, %d): stub\n", pAsync, ExceptionCode);
1194     return RPC_S_INVALID_ASYNC_HANDLE;
1195 }