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

   1 /*
   2  * RPC transport layer
   3  *
   4  * Copyright 2001 Ove Kåven, TransGaming Technologies
   5  * Copyright 2003 Mike Hearn
   6  * Copyright 2004 Filip Navara
   7  * Copyright 2006 Mike McCormack
   8  * Copyright 2006 Damjan Jovanovic
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  23  *
  24  */
  25
  26 #include "config.h"
  27
  28 #include <stdarg.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <assert.h>
  32 #include <errno.h>
  33
  34 #ifdef HAVE_UNISTD_H
  35 # include <unistd.h>
  36 #endif
  37 #include <fcntl.h>
  38 #include <stdlib.h>
  39 #include <sys/types.h>
  40 #ifdef HAVE_SYS_SOCKET_H
  41 # include <sys/socket.h>
  42 #endif
  43 #ifdef HAVE_NETINET_IN_H
  44 # include <netinet/in.h>
  45 #endif
  46 #ifdef HAVE_ARPA_INET_H
  47 # include <arpa/inet.h>
  48 #endif
  49 #ifdef HAVE_NETDB_H
  50 #include <netdb.h>
  51 #endif
  52 #ifdef HAVE_SYS_POLL_H
  53 #include <sys/poll.h>
  54 #endif
  55
  56 #include "windef.h"
  57 #include "winbase.h"
  58 #include "winnls.h"
  59 #include "winerror.h"
  60 #include "winreg.h"
  61 #include "winternl.h"
  62 #include "wine/unicode.h"
  63
  64 #include "rpc.h"
  65 #include "rpcndr.h"
  66
  67 #include "wine/debug.h"
  68
  69 #include "rpc_binding.h"
  70 #include "rpc_message.h"
  71 #include "rpc_server.h"
  72 #include "epm_towers.h"
  73
  74 WINE_DEFAULT_DEBUG_CHANNEL(rpc);
  75
  76 static CRITICAL_SECTION connection_pool_cs;
  77 static CRITICAL_SECTION_DEBUG connection_pool_cs_debug =
  78 {
  79     0, 0, &connection_pool_cs,
  80     { &connection_pool_cs_debug.ProcessLocksList, &connection_pool_cs_debug.ProcessLocksList },
  81       0, 0, { (DWORD_PTR)(__FILE__ ": connection_pool") }
  82 };
  83 static CRITICAL_SECTION connection_pool_cs = { &connection_pool_cs_debug, -1, 0, 0, 0, 0 };
  84
  85 static struct list connection_pool = LIST_INIT(connection_pool);
  86
  87 /**** ncacn_np support ****/
  88
  89 typedef struct _RpcConnection_np
  90 {
  91   RpcConnection common;
  92   HANDLE pipe, thread;
  93   OVERLAPPED ovl;
  94 } RpcConnection_np;
  95
  96 static RpcConnection *rpcrt4_conn_np_alloc(void)
  97 {
  98   RpcConnection_np *npc = HeapAlloc(GetProcessHeap(), 0, sizeof(RpcConnection_np));
  99   if (npc)
 100   {
 101     npc->pipe = NULL;
 102     npc->thread = NULL;
 103     memset(&npc->ovl, 0, sizeof(npc->ovl));
 104   }
 105   return &npc->common;
 106 }
 107
 108 static RPC_STATUS rpcrt4_connect_pipe(RpcConnection *Connection, LPCSTR pname)
 109 {
 110   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 111   TRACE("listening on %s\n", pname);
 112
 113   npc->pipe = CreateNamedPipeA(pname, PIPE_ACCESS_DUPLEX,
 114                                PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE,
 115                                PIPE_UNLIMITED_INSTANCES,
 116                                RPC_MAX_PACKET_SIZE, RPC_MAX_PACKET_SIZE, 5000, NULL);
 117   if (npc->pipe == INVALID_HANDLE_VALUE) {
 118     WARN("CreateNamedPipe failed with error %ld\n", GetLastError());
 119     return RPC_S_SERVER_UNAVAILABLE;
 120   }
 121
 122   memset(&npc->ovl, 0, sizeof(npc->ovl));
 123   npc->ovl.hEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
 124   if (ConnectNamedPipe(npc->pipe, &npc->ovl))
 125      return RPC_S_OK;
 126
 127   WARN("Couldn't ConnectNamedPipe (error was %ld)\n", GetLastError());
 128   if (GetLastError() == ERROR_PIPE_CONNECTED) {
 129     SetEvent(npc->ovl.hEvent);
 130     return RPC_S_OK;
 131   }
 132   if (GetLastError() == ERROR_IO_PENDING) {
 133     /* FIXME: looks like we need to GetOverlappedResult here? */
 134     return RPC_S_OK;
 135   }
 136   return RPC_S_SERVER_UNAVAILABLE;
 137 }
 138
 139 static RPC_STATUS rpcrt4_open_pipe(RpcConnection *Connection, LPCSTR pname, BOOL wait)
 140 {
 141   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 142   HANDLE pipe;
 143   DWORD err, dwMode;
 144
 145   TRACE("connecting to %s\n", pname);
 146
 147   while (TRUE) {
 148     pipe = CreateFileA(pname, GENERIC_READ|GENERIC_WRITE, 0, NULL,
 149                        OPEN_EXISTING, 0, 0);
 150     if (pipe != INVALID_HANDLE_VALUE) break;
 151     err = GetLastError();
 152     if (err == ERROR_PIPE_BUSY) {
 153       TRACE("connection failed, error=%lx\n", err);
 154       return RPC_S_SERVER_TOO_BUSY;
 155     }
 156     if (!wait)
 157       return RPC_S_SERVER_UNAVAILABLE;
 158     if (!WaitNamedPipeA(pname, NMPWAIT_WAIT_FOREVER)) {
 159       err = GetLastError();
 160       WARN("connection failed, error=%lx\n", err);
 161       return RPC_S_SERVER_UNAVAILABLE;
 162     }
 163   }
 164
 165   /* success */
 166   memset(&npc->ovl, 0, sizeof(npc->ovl));
 167   /* pipe is connected; change to message-read mode. */
 168   dwMode = PIPE_READMODE_MESSAGE;
 169   SetNamedPipeHandleState(pipe, &dwMode, NULL, NULL);
 170   npc->ovl.hEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
 171   npc->pipe = pipe;
 172
 173   return RPC_S_OK;
 174 }
 175
 176 static RPC_STATUS rpcrt4_ncalrpc_open(RpcConnection* Connection)
 177 {
 178   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 179   static LPCSTR prefix = "\\\\.\\pipe\\lrpc\\";
 180   RPC_STATUS r;
 181   LPSTR pname;
 182
 183   /* already connected? */
 184   if (npc->pipe)
 185     return RPC_S_OK;
 186
 187   /* protseq=ncalrpc: supposed to use NT LPC ports,
 188    * but we'll implement it with named pipes for now */
 189   pname = I_RpcAllocate(strlen(prefix) + strlen(Connection->Endpoint) + 1);
 190   strcat(strcpy(pname, prefix), Connection->Endpoint);
 191
 192   if (Connection->server)
 193     r = rpcrt4_connect_pipe(Connection, pname);
 194   else
 195     r = rpcrt4_open_pipe(Connection, pname, TRUE);
 196   I_RpcFree(pname);
 197
 198   return r;
 199 }
 200
 201 static RPC_STATUS rpcrt4_ncacn_np_open(RpcConnection* Connection)
 202 {
 203   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 204   static LPCSTR prefix = "\\\\.";
 205   RPC_STATUS r;
 206   LPSTR pname;
 207
 208   /* already connected? */
 209   if (npc->pipe)
 210     return RPC_S_OK;
 211
 212   /* protseq=ncacn_np: named pipes */
 213   pname = I_RpcAllocate(strlen(prefix) + strlen(Connection->Endpoint) + 1);
 214   strcat(strcpy(pname, prefix), Connection->Endpoint);
 215   if (Connection->server)
 216     r = rpcrt4_connect_pipe(Connection, pname);
 217   else
 218     r = rpcrt4_open_pipe(Connection, pname, FALSE);
 219   I_RpcFree(pname);
 220
 221   return r;
 222 }
 223
 224 static RPC_STATUS rpcrt4_conn_np_handoff(RpcConnection *old_conn, RpcConnection *new_conn)
 225 {
 226   RpcConnection_np *old_npc = (RpcConnection_np *) old_conn;
 227   RpcConnection_np *new_npc = (RpcConnection_np *) new_conn;
 228   /* because of the way named pipes work, we'll transfer the connected pipe
 229    * to the child, then reopen the server binding to continue listening */
 230
 231   new_npc->pipe = old_npc->pipe;
 232   new_npc->ovl = old_npc->ovl;
 233   old_npc->pipe = 0;
 234   memset(&old_npc->ovl, 0, sizeof(old_npc->ovl));
 235   return RPCRT4_OpenConnection(old_conn);
 236 }
 237
 238 static int rpcrt4_conn_np_read(RpcConnection *Connection,
 239                         void *buffer, unsigned int count)
 240 {
 241   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 242   DWORD dwRead = 0;
 243   if (!ReadFile(npc->pipe, buffer, count, &dwRead, NULL) &&
 244       (GetLastError() != ERROR_MORE_DATA))
 245     return -1;
 246   return dwRead;
 247 }
 248
 249 static int rpcrt4_conn_np_write(RpcConnection *Connection,
 250                              const void *buffer, unsigned int count)
 251 {
 252   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 253   DWORD dwWritten = 0;
 254   if (!WriteFile(npc->pipe, buffer, count, &dwWritten, NULL))
 255     return -1;
 256   return dwWritten;
 257 }
 258
 259 static int rpcrt4_conn_np_close(RpcConnection *Connection)
 260 {
 261   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 262   if (npc->pipe) {
 263     FlushFileBuffers(npc->pipe);
 264     CloseHandle(npc->pipe);
 265     npc->pipe = 0;
 266   }
 267   if (npc->ovl.hEvent) {
 268     CloseHandle(npc->ovl.hEvent);
 269     npc->ovl.hEvent = 0;
 270   }
 271   return 0;
 272 }
 273
 274 static size_t rpcrt4_ncacn_np_get_top_of_tower(unsigned char *tower_data,
 275                                                const char *networkaddr,
 276                                                const char *endpoint)
 277 {
 278     twr_empty_floor_t *smb_floor;
 279     twr_empty_floor_t *nb_floor;
 280     size_t size;
 281     size_t networkaddr_size;
 282     size_t endpoint_size;
 283
 284     TRACE("(%p, %s, %s)\n", tower_data, networkaddr, endpoint);
 285
 286     networkaddr_size = strlen(networkaddr) + 1;
 287     endpoint_size = strlen(endpoint) + 1;
 288     size = sizeof(*smb_floor) + endpoint_size + sizeof(*nb_floor) + networkaddr_size;
 289
 290     if (!tower_data)
 291         return size;
 292
 293     smb_floor = (twr_empty_floor_t *)tower_data;
 294
 295     tower_data += sizeof(*smb_floor);
 296
 297     smb_floor->count_lhs = sizeof(smb_floor->protid);
 298     smb_floor->protid = EPM_PROTOCOL_SMB;
 299     smb_floor->count_rhs = endpoint_size;
 300
 301     memcpy(tower_data, endpoint, endpoint_size);
 302     tower_data += endpoint_size;
 303
 304     nb_floor = (twr_empty_floor_t *)tower_data;
 305
 306     tower_data += sizeof(*nb_floor);
 307
 308     nb_floor->count_lhs = sizeof(nb_floor->protid);
 309     nb_floor->protid = EPM_PROTOCOL_NETBIOS;
 310     nb_floor->count_rhs = networkaddr_size;
 311
 312     memcpy(tower_data, networkaddr, networkaddr_size);
 313     tower_data += networkaddr_size;
 314
 315     return size;
 316 }
 317
 318 static RPC_STATUS rpcrt4_ncacn_np_parse_top_of_tower(const unsigned char *tower_data,
 319                                                      size_t tower_size,
 320                                                      char **networkaddr,
 321                                                      char **endpoint)
 322 {
 323     const twr_empty_floor_t *smb_floor = (const twr_empty_floor_t *)tower_data;
 324     const twr_empty_floor_t *nb_floor;
 325
 326     TRACE("(%p, %d, %p, %p)\n", tower_data, (int)tower_size, networkaddr, endpoint);
 327
 328     if (tower_size < sizeof(*smb_floor))
 329         return EPT_S_NOT_REGISTERED;
 330
 331     tower_data += sizeof(*smb_floor);
 332     tower_size -= sizeof(*smb_floor);
 333
 334     if ((smb_floor->count_lhs != sizeof(smb_floor->protid)) ||
 335         (smb_floor->protid != EPM_PROTOCOL_SMB) ||
 336         (smb_floor->count_rhs > tower_size))
 337         return EPT_S_NOT_REGISTERED;
 338
 339     if (endpoint)
 340     {
 341         *endpoint = I_RpcAllocate(smb_floor->count_rhs);
 342         if (!*endpoint)
 343             return RPC_S_OUT_OF_RESOURCES;
 344         memcpy(*endpoint, tower_data, smb_floor->count_rhs);
 345     }
 346     tower_data += smb_floor->count_rhs;
 347     tower_size -= smb_floor->count_rhs;
 348
 349     if (tower_size < sizeof(*nb_floor))
 350         return EPT_S_NOT_REGISTERED;
 351
 352     nb_floor = (const twr_empty_floor_t *)tower_data;
 353
 354     tower_data += sizeof(*nb_floor);
 355     tower_size -= sizeof(*nb_floor);
 356
 357     if ((nb_floor->count_lhs != sizeof(nb_floor->protid)) ||
 358         (nb_floor->protid != EPM_PROTOCOL_NETBIOS) ||
 359         (nb_floor->count_rhs > tower_size))
 360         return EPT_S_NOT_REGISTERED;
 361
 362     if (networkaddr)
 363     {
 364         *networkaddr = I_RpcAllocate(nb_floor->count_rhs);
 365         if (!*networkaddr)
 366         {
 367             if (endpoint)
 368             {
 369                 I_RpcFree(*endpoint);
 370                 *endpoint = NULL;
 371             }
 372             return RPC_S_OUT_OF_RESOURCES;
 373         }
 374         memcpy(*networkaddr, tower_data, nb_floor->count_rhs);
 375     }
 376
 377     return RPC_S_OK;
 378 }
 379
 380 typedef struct _RpcServerProtseq_np
 381 {
 382     RpcServerProtseq common;
 383     HANDLE mgr_event;
 384 } RpcServerProtseq_np;
 385
 386 static RpcServerProtseq *rpcrt4_protseq_np_alloc(void)
 387 {
 388     RpcServerProtseq_np *ps = HeapAlloc(GetProcessHeap(), 0, sizeof(*ps));
 389     if (ps)
 390         ps->mgr_event = CreateEventW(NULL, FALSE, FALSE, NULL);
 391     return &ps->common;
 392 }
 393
 394 static void rpcrt4_protseq_np_signal_state_changed(RpcServerProtseq *protseq)
 395 {
 396     RpcServerProtseq_np *npps = CONTAINING_RECORD(protseq, RpcServerProtseq_np, common);
 397     SetEvent(npps->mgr_event);
 398 }
 399
 400 static void *rpcrt4_protseq_np_get_wait_array(RpcServerProtseq *protseq, void *prev_array, unsigned int *count)
 401 {
 402     HANDLE *objs = prev_array;
 403     RpcConnection_np *conn;
 404     RpcServerProtseq_np *npps = CONTAINING_RECORD(protseq, RpcServerProtseq_np, common);
 405
 406     EnterCriticalSection(&protseq->cs);
 407
 408     /* open and count connections */
 409     *count = 1;
 410     conn = CONTAINING_RECORD(protseq->conn, RpcConnection_np, common);
 411     while (conn) {
 412         RPCRT4_OpenConnection(&conn->common);
 413         if (conn->ovl.hEvent)
 414             (*count)++;
 415         conn = CONTAINING_RECORD(conn->common.Next, RpcConnection_np, common);
 416     }
 417
 418     /* make array of connections */
 419     if (objs)
 420         objs = HeapReAlloc(GetProcessHeap(), 0, objs, *count*sizeof(HANDLE));
 421     else
 422         objs = HeapAlloc(GetProcessHeap(), 0, *count*sizeof(HANDLE));
 423     if (!objs)
 424     {
 425         ERR("couldn't allocate objs\n");
 426         LeaveCriticalSection(&protseq->cs);
 427         return NULL;
 428     }
 429
 430     objs[0] = npps->mgr_event;
 431     *count = 1;
 432     conn = CONTAINING_RECORD(protseq->conn, RpcConnection_np, common);
 433     while (conn) {
 434         if ((objs[*count] = conn->ovl.hEvent))
 435             (*count)++;
 436         conn = CONTAINING_RECORD(conn->common.Next, RpcConnection_np, common);
 437     }
 438     LeaveCriticalSection(&protseq->cs);
 439     return objs;
 440 }
 441
 442 static void rpcrt4_protseq_np_free_wait_array(RpcServerProtseq *protseq, void *array)
 443 {
 444     HeapFree(GetProcessHeap(), 0, array);
 445 }
 446
 447 static int rpcrt4_protseq_np_wait_for_new_connection(RpcServerProtseq *protseq, unsigned int count, void *wait_array)
 448 {
 449     HANDLE b_handle;
 450     HANDLE *objs = wait_array;
 451     DWORD res;
 452     RpcConnection *cconn;
 453     RpcConnection_np *conn;
 454
 455     if (!objs)
 456         return -1;
 457
 458     res = WaitForMultipleObjects(count, objs, FALSE, INFINITE);
 459     if (res == WAIT_OBJECT_0)
 460         return 0;
 461     else if (res == WAIT_FAILED)
 462     {
 463         ERR("wait failed with error %ld\n", GetLastError());
 464         return -1;
 465     }
 466     else
 467     {
 468         b_handle = objs[res - WAIT_OBJECT_0];
 469         /* find which connection got a RPC */
 470         EnterCriticalSection(&protseq->cs);
 471         conn = CONTAINING_RECORD(protseq->conn, RpcConnection_np, common);
 472         while (conn) {
 473             if (b_handle == conn->ovl.hEvent) break;
 474             conn = CONTAINING_RECORD(conn->common.Next, RpcConnection_np, common);
 475         }
 476         cconn = NULL;
 477         if (conn)
 478             RPCRT4_SpawnConnection(&cconn, &conn->common);
 479         else
 480             ERR("failed to locate connection for handle %p\n", b_handle);
 481         LeaveCriticalSection(&protseq->cs);
 482         if (cconn)
 483         {
 484             RPCRT4_new_client(cconn);
 485             return 1;
 486         }
 487         else return -1;
 488     }
 489 }
 490
 491 static size_t rpcrt4_ncalrpc_get_top_of_tower(unsigned char *tower_data,
 492                                               const char *networkaddr,
 493                                               const char *endpoint)
 494 {
 495     twr_empty_floor_t *pipe_floor;
 496     size_t size;
 497     size_t endpoint_size;
 498
 499     TRACE("(%p, %s, %s)\n", tower_data, networkaddr, endpoint);
 500
 501     endpoint_size = strlen(networkaddr) + 1;
 502     size = sizeof(*pipe_floor) + endpoint_size;
 503
 504     if (!tower_data)
 505         return size;
 506
 507     pipe_floor = (twr_empty_floor_t *)tower_data;
 508
 509     tower_data += sizeof(*pipe_floor);
 510
 511     pipe_floor->count_lhs = sizeof(pipe_floor->protid);
 512     pipe_floor->protid = EPM_PROTOCOL_SMB;
 513     pipe_floor->count_rhs = endpoint_size;
 514
 515     memcpy(tower_data, endpoint, endpoint_size);
 516     tower_data += endpoint_size;
 517
 518     return size;
 519 }
 520
 521 static RPC_STATUS rpcrt4_ncalrpc_parse_top_of_tower(const unsigned char *tower_data,
 522                                                     size_t tower_size,
 523                                                     char **networkaddr,
 524                                                     char **endpoint)
 525 {
 526     const twr_empty_floor_t *pipe_floor = (const twr_empty_floor_t *)tower_data;
 527
 528     TRACE("(%p, %d, %p, %p)\n", tower_data, (int)tower_size, networkaddr, endpoint);
 529
 530     *networkaddr = NULL;
 531     *endpoint = NULL;
 532
 533     if (tower_size < sizeof(*pipe_floor))
 534         return EPT_S_NOT_REGISTERED;
 535
 536     tower_data += sizeof(*pipe_floor);
 537     tower_size -= sizeof(*pipe_floor);
 538
 539     if ((pipe_floor->count_lhs != sizeof(pipe_floor->protid)) ||
 540         (pipe_floor->protid != EPM_PROTOCOL_SMB) ||
 541         (pipe_floor->count_rhs > tower_size))
 542         return EPT_S_NOT_REGISTERED;
 543
 544     if (endpoint)
 545     {
 546         *endpoint = I_RpcAllocate(pipe_floor->count_rhs);
 547         if (!*endpoint)
 548             return RPC_S_OUT_OF_RESOURCES;
 549         memcpy(*endpoint, tower_data, pipe_floor->count_rhs);
 550     }
 551
 552     return RPC_S_OK;
 553 }
 554
 555 /**** ncacn_ip_tcp support ****/
 556
 557 typedef struct _RpcConnection_tcp
 558 {
 559   RpcConnection common;
 560   int sock;
 561 } RpcConnection_tcp;
 562
 563 static RpcConnection *rpcrt4_conn_tcp_alloc(void)
 564 {
 565   RpcConnection_tcp *tcpc;
 566   tcpc = HeapAlloc(GetProcessHeap(), 0, sizeof(RpcConnection_tcp));
 567   if (tcpc == NULL)
 568     return NULL;
 569   tcpc->sock = -1;
 570   return &tcpc->common;
 571 }
 572
 573 static RPC_STATUS rpcrt4_ncacn_ip_tcp_open(RpcConnection* Connection)
 574 {
 575   RpcConnection_tcp *tcpc = (RpcConnection_tcp *) Connection;
 576   int sock;
 577   int ret;
 578   struct addrinfo *ai;
 579   struct addrinfo *ai_cur;
 580   struct addrinfo hints;
 581
 582   TRACE("(%s, %s)\n", Connection->NetworkAddr, Connection->Endpoint);
 583
 584   if (tcpc->sock != -1)
 585     return RPC_S_OK;
 586
 587   hints.ai_flags          = 0;
 588   hints.ai_family         = PF_UNSPEC;
 589   hints.ai_socktype       = SOCK_STREAM;
 590   hints.ai_protocol       = IPPROTO_TCP;
 591   hints.ai_addrlen        = 0;
 592   hints.ai_addr           = NULL;
 593   hints.ai_canonname      = NULL;
 594   hints.ai_next           = NULL;
 595
 596   ret = getaddrinfo(Connection->NetworkAddr, Connection->Endpoint, &hints, &ai);
 597   if (ret)
 598   {
 599     ERR("getaddrinfo failed: %s\n", gai_strerror(ret));
 600     return RPC_S_SERVER_UNAVAILABLE;
 601   }
 602
 603   for (ai_cur = ai; ai_cur; ai_cur = ai->ai_next)
 604   {
 605     if (TRACE_ON(rpc))
 606     {
 607       char host[256];
 608       char service[256];
 609       getnameinfo(ai_cur->ai_addr, ai_cur->ai_addrlen,
 610         host, sizeof(host), service, sizeof(service),
 611         NI_NUMERICHOST | NI_NUMERICSERV);
 612       TRACE("trying %s:%s\n", host, service);
 613     }
 614
 615     sock = socket(ai_cur->ai_family, ai_cur->ai_socktype, ai_cur->ai_protocol);
 616     if (sock < 0)
 617     {
 618       WARN("socket() failed\n");
 619       continue;
 620     }
 621
 622     if (Connection->server)
 623     {
 624       ret = bind(sock, ai_cur->ai_addr, ai_cur->ai_addrlen);
 625       if (ret < 0)
 626       {
 627         WARN("bind failed, error %d\n", ret);
 628         close(sock);
 629         continue;
 630       }
 631       ret = listen(sock, 10);
 632       if (ret < 0)
 633       {
 634         WARN("listen failed, error %d\n", ret);
 635         close(sock);
 636         continue;
 637       }
 638       /* need a non-blocking socket, otherwise accept() has a potential
 639        * race-condition (poll() says it is readable, connection drops,
 640        * and accept() blocks until the next connection comes...)
 641        */
 642       ret = fcntl(sock, F_SETFL, O_NONBLOCK);
 643       if (ret < 0)
 644       {
 645         WARN("couldn't make socket non-blocking, error %d\n", ret);
 646         close(sock);
 647         continue;
 648       }
 649       tcpc->sock = sock;
 650     }
 651     else /* it's a client */
 652     {
 653       if (0>connect(sock, ai_cur->ai_addr, ai_cur->ai_addrlen))
 654       {
 655         WARN("connect() failed\n");
 656         close(sock);
 657         continue;
 658       }
 659       tcpc->sock = sock;
 660     }
 661
 662     freeaddrinfo(ai);
 663     TRACE("connected\n");
 664     return RPC_S_OK;
 665   }
 666
 667   freeaddrinfo(ai);
 668   ERR("couldn't connect to %s:%s\n", Connection->NetworkAddr, Connection->Endpoint);
 669   return RPC_S_SERVER_UNAVAILABLE;
 670 }
 671
 672 static RPC_STATUS rpcrt4_conn_tcp_handoff(RpcConnection *old_conn, RpcConnection *new_conn)
 673 {
 674   int ret;
 675   struct sockaddr_in address;
 676   socklen_t addrsize;
 677   RpcConnection_tcp *server = (RpcConnection_tcp*) old_conn;
 678   RpcConnection_tcp *client = (RpcConnection_tcp*) new_conn;
 679
 680   addrsize = sizeof(address);
 681   ret = accept(server->sock, (struct sockaddr*) &address, &addrsize);
 682   if (ret < 0)
 683   {
 684     ERR("Failed to accept a TCP connection: error %d\n", ret);
 685     return RPC_S_SERVER_UNAVAILABLE;
 686   }
 687   client->sock = ret;
 688   TRACE("Accepted a new TCP connection\n");
 689   return RPC_S_OK;
 690 }
 691
 692 static int rpcrt4_conn_tcp_read(RpcConnection *Connection,
 693                                 void *buffer, unsigned int count)
 694 {
 695   RpcConnection_tcp *tcpc = (RpcConnection_tcp *) Connection;
 696   int r = recv(tcpc->sock, buffer, count, MSG_WAITALL);
 697   TRACE("%d %p %u -> %d\n", tcpc->sock, buffer, count, r);
 698   return r;
 699 }
 700
 701 static int rpcrt4_conn_tcp_write(RpcConnection *Connection,
 702                                  const void *buffer, unsigned int count)
 703 {
 704   RpcConnection_tcp *tcpc = (RpcConnection_tcp *) Connection;
 705   int r = write(tcpc->sock, buffer, count);
 706   TRACE("%d %p %u -> %d\n", tcpc->sock, buffer, count, r);
 707   return r;
 708 }
 709
 710 static int rpcrt4_conn_tcp_close(RpcConnection *Connection)
 711 {
 712   RpcConnection_tcp *tcpc = (RpcConnection_tcp *) Connection;
 713
 714   TRACE("%d\n", tcpc->sock);
 715
 716   if (tcpc->sock != -1)
 717     close(tcpc->sock);
 718   tcpc->sock = -1;
 719   return 0;
 720 }
 721
 722 static size_t rpcrt4_ncacn_ip_tcp_get_top_of_tower(unsigned char *tower_data,
 723                                                    const char *networkaddr,
 724                                                    const char *endpoint)
 725 {
 726     twr_tcp_floor_t *tcp_floor;
 727     twr_ipv4_floor_t *ipv4_floor;
 728     struct addrinfo *ai;
 729     struct addrinfo hints;
 730     int ret;
 731     size_t size = sizeof(*tcp_floor) + sizeof(*ipv4_floor);
 732
 733     TRACE("(%p, %s, %s)\n", tower_data, networkaddr, endpoint);
 734
 735     if (!tower_data)
 736         return size;
 737
 738     tcp_floor = (twr_tcp_floor_t *)tower_data;
 739     tower_data += sizeof(*tcp_floor);
 740
 741     ipv4_floor = (twr_ipv4_floor_t *)tower_data;
 742
 743     tcp_floor->count_lhs = sizeof(tcp_floor->protid);
 744     tcp_floor->protid = EPM_PROTOCOL_TCP;
 745     tcp_floor->count_rhs = sizeof(tcp_floor->port);
 746
 747     ipv4_floor->count_lhs = sizeof(ipv4_floor->protid);
 748     ipv4_floor->protid = EPM_PROTOCOL_IP;
 749     ipv4_floor->count_rhs = sizeof(ipv4_floor->ipv4addr);
 750
 751     hints.ai_flags          = AI_NUMERICHOST;
 752     /* FIXME: only support IPv4 at the moment. how is IPv6 represented by the EPM? */
 753     hints.ai_family         = PF_INET;
 754     hints.ai_socktype       = SOCK_STREAM;
 755     hints.ai_protocol       = IPPROTO_TCP;
 756     hints.ai_addrlen        = 0;
 757     hints.ai_addr           = NULL;
 758     hints.ai_canonname      = NULL;
 759     hints.ai_next           = NULL;
 760
 761     ret = getaddrinfo(networkaddr, endpoint, &hints, &ai);
 762     if (ret)
 763     {
 764         ret = getaddrinfo("0.0.0.0", endpoint, &hints, &ai);
 765         if (ret)
 766         {
 767             ERR("getaddrinfo failed: %s\n", gai_strerror(ret));
 768             return 0;
 769         }
 770     }
 771
 772     if (ai->ai_family == PF_INET)
 773     {
 774         const struct sockaddr_in *sin = (const struct sockaddr_in *)ai->ai_addr;
 775         tcp_floor->port = sin->sin_port;
 776         ipv4_floor->ipv4addr = sin->sin_addr.s_addr;
 777     }
 778     else
 779     {
 780         ERR("unexpected protocol family %d\n", ai->ai_family);
 781         return 0;
 782     }
 783
 784     freeaddrinfo(ai);
 785
 786     return size;
 787 }
 788
 789 static RPC_STATUS rpcrt4_ncacn_ip_tcp_parse_top_of_tower(const unsigned char *tower_data,
 790                                                          size_t tower_size,
 791                                                          char **networkaddr,
 792                                                          char **endpoint)
 793 {
 794     const twr_tcp_floor_t *tcp_floor = (const twr_tcp_floor_t *)tower_data;
 795     const twr_ipv4_floor_t *ipv4_floor;
 796     struct in_addr in_addr;
 797
 798     TRACE("(%p, %d, %p, %p)\n", tower_data, (int)tower_size, networkaddr, endpoint);
 799
 800     if (tower_size < sizeof(*tcp_floor))
 801         return EPT_S_NOT_REGISTERED;
 802
 803     tower_data += sizeof(*tcp_floor);
 804     tower_size -= sizeof(*tcp_floor);
 805
 806     if (tower_size < sizeof(*ipv4_floor))
 807         return EPT_S_NOT_REGISTERED;
 808
 809     ipv4_floor = (const twr_ipv4_floor_t *)tower_data;
 810
 811     if ((tcp_floor->count_lhs != sizeof(tcp_floor->protid)) ||
 812         (tcp_floor->protid != EPM_PROTOCOL_TCP) ||
 813         (tcp_floor->count_rhs != sizeof(tcp_floor->port)) ||
 814         (ipv4_floor->count_lhs != sizeof(ipv4_floor->protid)) ||
 815         (ipv4_floor->protid != EPM_PROTOCOL_IP) ||
 816         (ipv4_floor->count_rhs != sizeof(ipv4_floor->ipv4addr)))
 817         return EPT_S_NOT_REGISTERED;
 818
 819     if (endpoint)
 820     {
 821         *endpoint = I_RpcAllocate(6 /* sizeof("65535") + 1 */);
 822         if (!*endpoint)
 823             return RPC_S_OUT_OF_RESOURCES;
 824         sprintf(*endpoint, "%u", ntohs(tcp_floor->port));
 825     }
 826
 827     if (networkaddr)
 828     {
 829         *networkaddr = I_RpcAllocate(INET_ADDRSTRLEN);
 830         if (!*networkaddr)
 831         {
 832             if (endpoint)
 833             {
 834                 I_RpcFree(*endpoint);
 835                 *endpoint = NULL;
 836             }
 837             return RPC_S_OUT_OF_RESOURCES;
 838         }
 839         in_addr.s_addr = ipv4_floor->ipv4addr;
 840         if (!inet_ntop(AF_INET, &in_addr, *networkaddr, INET_ADDRSTRLEN))
 841         {
 842             ERR("inet_ntop: %s\n", strerror(errno));
 843             I_RpcFree(*networkaddr);
 844             *networkaddr = NULL;
 845             if (endpoint)
 846             {
 847                 I_RpcFree(*endpoint);
 848                 *endpoint = NULL;
 849             }
 850             return EPT_S_NOT_REGISTERED;
 851         }
 852     }
 853
 854     return RPC_S_OK;
 855 }
 856
 857 typedef struct _RpcServerProtseq_sock
 858 {
 859     RpcServerProtseq common;
 860     int mgr_event_rcv;
 861     int mgr_event_snd;
 862 } RpcServerProtseq_sock;
 863
 864 static RpcServerProtseq *rpcrt4_protseq_sock_alloc(void)
 865 {
 866     RpcServerProtseq_sock *ps = HeapAlloc(GetProcessHeap(), 0, sizeof(*ps));
 867     if (ps)
 868     {
 869         int fds[2];
 870         if (!socketpair(PF_UNIX, SOCK_DGRAM, 0, fds))
 871         {
 872             fcntl(fds[0], F_SETFL, O_NONBLOCK);
 873             fcntl(fds[1], F_SETFL, O_NONBLOCK);
 874             ps->mgr_event_rcv = fds[0];
 875             ps->mgr_event_snd = fds[1];
 876         }
 877         else
 878         {
 879             ERR("socketpair failed with error %s\n", strerror(errno));
 880             HeapFree(GetProcessHeap(), 0, ps);
 881             return NULL;
 882         }
 883     }
 884     return &ps->common;
 885 }
 886
 887 static void rpcrt4_protseq_sock_signal_state_changed(RpcServerProtseq *protseq)
 888 {
 889     RpcServerProtseq_sock *sockps = CONTAINING_RECORD(protseq, RpcServerProtseq_sock, common);
 890     char dummy = 1;
 891     write(sockps->mgr_event_snd, &dummy, sizeof(dummy));
 892 }
 893
 894 static void *rpcrt4_protseq_sock_get_wait_array(RpcServerProtseq *protseq, void *prev_array, unsigned int *count)
 895 {
 896     struct pollfd *poll_info = prev_array;
 897     RpcConnection_tcp *conn;
 898     RpcServerProtseq_sock *sockps = CONTAINING_RECORD(protseq, RpcServerProtseq_sock, common);
 899
 900     EnterCriticalSection(&protseq->cs);
 901
 902     /* open and count connections */
 903     *count = 1;
 904     conn = (RpcConnection_tcp *)protseq->conn;
 905     while (conn) {
 906         RPCRT4_OpenConnection(&conn->common);
 907         if (conn->sock != -1)
 908             (*count)++;
 909         conn = (RpcConnection_tcp *)conn->common.Next;
 910     }
 911
 912     /* make array of connections */
 913     if (poll_info)
 914         poll_info = HeapReAlloc(GetProcessHeap(), 0, poll_info, *count*sizeof(*poll_info));
 915     else
 916         poll_info = HeapAlloc(GetProcessHeap(), 0, *count*sizeof(*poll_info));
 917     if (!poll_info)
 918     {
 919         ERR("couldn't allocate poll_info\n");
 920         LeaveCriticalSection(&protseq->cs);
 921         return NULL;
 922     }
 923
 924     poll_info[0].fd = sockps->mgr_event_rcv;
 925     poll_info[0].events = POLLIN;
 926     *count = 1;
 927     conn =  CONTAINING_RECORD(protseq->conn, RpcConnection_tcp, common);
 928     while (conn) {
 929         if (conn->sock != -1)
 930         {
 931             poll_info[*count].fd = conn->sock;
 932             poll_info[*count].events = POLLIN;
 933             (*count)++;
 934         }
 935         conn = CONTAINING_RECORD(conn->common.Next, RpcConnection_tcp, common);
 936     }
 937     LeaveCriticalSection(&protseq->cs);
 938     return poll_info;
 939 }
 940
 941 static void rpcrt4_protseq_sock_free_wait_array(RpcServerProtseq *protseq, void *array)
 942 {
 943     HeapFree(GetProcessHeap(), 0, array);
 944 }
 945
 946 static int rpcrt4_protseq_sock_wait_for_new_connection(RpcServerProtseq *protseq, unsigned int count, void *wait_array)
 947 {
 948     struct pollfd *poll_info = wait_array;
 949     int ret, i;
 950     RpcConnection *cconn;
 951     RpcConnection_tcp *conn;
 952
 953     if (!poll_info)
 954         return -1;
 955
 956     ret = poll(poll_info, count, -1);
 957     if (ret < 0)
 958     {
 959         ERR("poll failed with error %d\n", ret);
 960         return -1;
 961     }
 962
 963     for (i = 0; i < count; i++)
 964         if (poll_info[i].revents & POLLIN)
 965         {
 966             /* RPC server event */
 967             if (i == 0)
 968             {
 969                 char dummy;
 970                 read(poll_info[0].fd, &dummy, sizeof(dummy));
 971                 return 0;
 972             }
 973
 974             /* find which connection got a RPC */
 975             EnterCriticalSection(&protseq->cs);
 976             conn = CONTAINING_RECORD(protseq->conn, RpcConnection_tcp, common);
 977             while (conn) {
 978                 if (poll_info[i].fd == conn->sock) break;
 979                 conn = CONTAINING_RECORD(conn->common.Next, RpcConnection_tcp, common);
 980             }
 981             cconn = NULL;
 982             if (conn)
 983                 RPCRT4_SpawnConnection(&cconn, &conn->common);
 984             else
 985                 ERR("failed to locate connection for fd %d\n", poll_info[i].fd);
 986             LeaveCriticalSection(&protseq->cs);
 987             if (cconn)
 988                 RPCRT4_new_client(cconn);
 989             else
 990                 return -1;
 991         }
 992
 993     return 1;
 994 }
 995
 996 static const struct connection_ops conn_protseq_list[] = {
 997   { "ncacn_np",
 998     { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SMB },
 999     rpcrt4_conn_np_alloc,
1000     rpcrt4_ncacn_np_open,
1001     rpcrt4_conn_np_handoff,
1002     rpcrt4_conn_np_read,
1003     rpcrt4_conn_np_write,
1004     rpcrt4_conn_np_close,
1005     rpcrt4_ncacn_np_get_top_of_tower,
1006     rpcrt4_ncacn_np_parse_top_of_tower,
1007   },
1008   { "ncalrpc",
1009     { EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_PIPE },
1010     rpcrt4_conn_np_alloc,
1011     rpcrt4_ncalrpc_open,
1012     rpcrt4_conn_np_handoff,
1013     rpcrt4_conn_np_read,
1014     rpcrt4_conn_np_write,
1015     rpcrt4_conn_np_close,
1016     rpcrt4_ncalrpc_get_top_of_tower,
1017     rpcrt4_ncalrpc_parse_top_of_tower,
1018   },
1019   { "ncacn_ip_tcp",
1020     { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_TCP },
1021     rpcrt4_conn_tcp_alloc,
1022     rpcrt4_ncacn_ip_tcp_open,
1023     rpcrt4_conn_tcp_handoff,
1024     rpcrt4_conn_tcp_read,
1025     rpcrt4_conn_tcp_write,
1026     rpcrt4_conn_tcp_close,
1027     rpcrt4_ncacn_ip_tcp_get_top_of_tower,
1028     rpcrt4_ncacn_ip_tcp_parse_top_of_tower,
1029   }
1030 };
1031
1032
1033 static const struct protseq_ops protseq_list[] =
1034 {
1035     {
1036         "ncacn_np",
1037         rpcrt4_protseq_np_alloc,
1038         rpcrt4_protseq_np_signal_state_changed,
1039         rpcrt4_protseq_np_get_wait_array,
1040         rpcrt4_protseq_np_free_wait_array,
1041         rpcrt4_protseq_np_wait_for_new_connection,
1042     },
1043     {
1044         "ncalrpc",
1045         rpcrt4_protseq_np_alloc,
1046         rpcrt4_protseq_np_signal_state_changed,
1047         rpcrt4_protseq_np_get_wait_array,
1048         rpcrt4_protseq_np_free_wait_array,
1049         rpcrt4_protseq_np_wait_for_new_connection,
1050     },
1051     {
1052         "ncacn_ip_tcp",
1053         rpcrt4_protseq_sock_alloc,
1054         rpcrt4_protseq_sock_signal_state_changed,
1055         rpcrt4_protseq_sock_get_wait_array,
1056         rpcrt4_protseq_sock_free_wait_array,
1057         rpcrt4_protseq_sock_wait_for_new_connection,
1058     },
1059 };
1060
1061 #define ARRAYSIZE(a) (sizeof((a)) / sizeof((a)[0]))
1062
1063 const struct protseq_ops *rpcrt4_get_protseq_ops(const char *protseq)
1064 {
1065   int i;
1066   for(i=0; i<ARRAYSIZE(protseq_list); i++)
1067     if (!strcmp(protseq_list[i].name, protseq))
1068       return &protseq_list[i];
1069   return NULL;
1070 }
1071
1072 static const struct connection_ops *rpcrt4_get_conn_protseq_ops(const char *protseq)
1073 {
1074     int i;
1075     for(i=0; i<ARRAYSIZE(conn_protseq_list); i++)
1076         if (!strcmp(conn_protseq_list[i].name, protseq))
1077             return &conn_protseq_list[i];
1078     return NULL;
1079 }
1080
1081 /**** interface to rest of code ****/
1082
1083 RPC_STATUS RPCRT4_OpenConnection(RpcConnection* Connection)
1084 {
1085   TRACE("(Connection == ^%p)\n", Connection);
1086
1087   return Connection->ops->open_connection(Connection);
1088 }
1089
1090 RPC_STATUS RPCRT4_CloseConnection(RpcConnection* Connection)
1091 {
1092   TRACE("(Connection == ^%p)\n", Connection);
1093   rpcrt4_conn_close(Connection);
1094   return RPC_S_OK;
1095 }
1096
1097 RPC_STATUS RPCRT4_CreateConnection(RpcConnection** Connection, BOOL server,
1098     LPCSTR Protseq, LPCSTR NetworkAddr, LPCSTR Endpoint,
1099     LPCSTR NetworkOptions, RpcAuthInfo* AuthInfo, RpcBinding* Binding)
1100 {
1101   const struct connection_ops *ops;
1102   RpcConnection* NewConnection;
1103
1104   ops = rpcrt4_get_conn_protseq_ops(Protseq);
1105   if (!ops)
1106     return RPC_S_PROTSEQ_NOT_SUPPORTED;
1107
1108   NewConnection = ops->alloc();
1109   NewConnection->Next = NULL;
1110   NewConnection->server = server;
1111   NewConnection->ops = ops;
1112   NewConnection->NetworkAddr = RPCRT4_strdupA(NetworkAddr);
1113   NewConnection->Endpoint = RPCRT4_strdupA(Endpoint);
1114   NewConnection->Used = Binding;
1115   NewConnection->MaxTransmissionSize = RPC_MAX_PACKET_SIZE;
1116   memset(&NewConnection->ActiveInterface, 0, sizeof(NewConnection->ActiveInterface));
1117   NewConnection->NextCallId = 1;
1118
1119   memset(&NewConnection->ctx, 0, sizeof(NewConnection->ctx));
1120   if (AuthInfo) RpcAuthInfo_AddRef(AuthInfo);
1121   NewConnection->AuthInfo = AuthInfo;
1122   list_init(&NewConnection->conn_pool_entry);
1123
1124   TRACE("connection: %p\n", NewConnection);
1125   *Connection = NewConnection;
1126
1127   return RPC_S_OK;
1128 }
1129
1130 RpcConnection *RPCRT4_GetIdleConnection(const RPC_SYNTAX_IDENTIFIER *InterfaceId,
1131     const RPC_SYNTAX_IDENTIFIER *TransferSyntax, LPCSTR Protseq, LPCSTR NetworkAddr,
1132     LPCSTR Endpoint, RpcAuthInfo* AuthInfo)
1133 {
1134   RpcConnection *Connection;
1135   /* try to find a compatible connection from the connection pool */
1136   EnterCriticalSection(&connection_pool_cs);
1137   LIST_FOR_EACH_ENTRY(Connection, &connection_pool, RpcConnection, conn_pool_entry)
1138     if ((Connection->AuthInfo == AuthInfo) &&
1139         !memcmp(&Connection->ActiveInterface, InterfaceId,
1140            sizeof(RPC_SYNTAX_IDENTIFIER)) &&
1141         !strcmp(rpcrt4_conn_get_name(Connection), Protseq) &&
1142         !strcmp(Connection->NetworkAddr, NetworkAddr) &&
1143         !strcmp(Connection->Endpoint, Endpoint))
1144     {
1145       list_remove(&Connection->conn_pool_entry);
1146       LeaveCriticalSection(&connection_pool_cs);
1147       TRACE("got connection from pool %p\n", Connection);
1148       return Connection;
1149     }
1150
1151   LeaveCriticalSection(&connection_pool_cs);
1152   return NULL;
1153 }
1154
1155 void RPCRT4_ReleaseIdleConnection(RpcConnection *Connection)
1156 {
1157   assert(!Connection->server);
1158   EnterCriticalSection(&connection_pool_cs);
1159   list_add_head(&connection_pool, &Connection->conn_pool_entry);
1160   LeaveCriticalSection(&connection_pool_cs);
1161 }
1162
1163
1164 RPC_STATUS RPCRT4_SpawnConnection(RpcConnection** Connection, RpcConnection* OldConnection)
1165 {
1166   RPC_STATUS err;
1167
1168   err = RPCRT4_CreateConnection(Connection, OldConnection->server,
1169                                 rpcrt4_conn_get_name(OldConnection),
1170                                 OldConnection->NetworkAddr,
1171                                 OldConnection->Endpoint, NULL,
1172                                 OldConnection->AuthInfo, NULL);
1173   if (err == RPC_S_OK)
1174     rpcrt4_conn_handoff(OldConnection, *Connection);
1175   return err;
1176 }
1177
1178 RPC_STATUS RPCRT4_DestroyConnection(RpcConnection* Connection)
1179 {
1180   TRACE("connection: %p\n", Connection);
1181
1182   RPCRT4_CloseConnection(Connection);
1183   RPCRT4_strfree(Connection->Endpoint);
1184   RPCRT4_strfree(Connection->NetworkAddr);
1185   if (Connection->AuthInfo) RpcAuthInfo_Release(Connection->AuthInfo);
1186   HeapFree(GetProcessHeap(), 0, Connection);
1187   return RPC_S_OK;
1188 }
1189
1190 RPC_STATUS RpcTransport_GetTopOfTower(unsigned char *tower_data,
1191                                       size_t *tower_size,
1192                                       const char *protseq,
1193                                       const char *networkaddr,
1194                                       const char *endpoint)
1195 {
1196     twr_empty_floor_t *protocol_floor;
1197     const struct connection_ops *protseq_ops = rpcrt4_get_conn_protseq_ops(protseq);
1198
1199     *tower_size = 0;
1200
1201     if (!protseq_ops)
1202         return RPC_S_INVALID_RPC_PROTSEQ;
1203
1204     if (!tower_data)
1205     {
1206         *tower_size = sizeof(*protocol_floor);
1207         *tower_size += protseq_ops->get_top_of_tower(NULL, networkaddr, endpoint);
1208         return RPC_S_OK;
1209     }
1210
1211     protocol_floor = (twr_empty_floor_t *)tower_data;
1212     protocol_floor->count_lhs = sizeof(protocol_floor->protid);
1213     protocol_floor->protid = protseq_ops->epm_protocols[0];
1214     protocol_floor->count_rhs = 0;
1215
1216     tower_data += sizeof(*protocol_floor);
1217
1218     *tower_size = protseq_ops->get_top_of_tower(tower_data, networkaddr, endpoint);
1219     if (!*tower_size)
1220         return EPT_S_NOT_REGISTERED;
1221
1222     *tower_size += sizeof(*protocol_floor);
1223
1224     return RPC_S_OK;
1225 }
1226
1227 RPC_STATUS RpcTransport_ParseTopOfTower(const unsigned char *tower_data,
1228                                         size_t tower_size,
1229                                         char **protseq,
1230                                         char **networkaddr,
1231                                         char **endpoint)
1232 {
1233     const twr_empty_floor_t *protocol_floor;
1234     const twr_empty_floor_t *floor4;
1235     const struct connection_ops *protseq_ops = NULL;
1236     RPC_STATUS status;
1237     int i;
1238
1239     if (tower_size < sizeof(*protocol_floor))
1240         return EPT_S_NOT_REGISTERED;
1241
1242     protocol_floor = (const twr_empty_floor_t *)tower_data;
1243     tower_data += sizeof(*protocol_floor);
1244     tower_size -= sizeof(*protocol_floor);
1245     if ((protocol_floor->count_lhs != sizeof(protocol_floor->protid)) ||
1246         (protocol_floor->count_rhs > tower_size))
1247         return EPT_S_NOT_REGISTERED;
1248     tower_data += protocol_floor->count_rhs;
1249     tower_size -= protocol_floor->count_rhs;
1250
1251     floor4 = (const twr_empty_floor_t *)tower_data;
1252     if ((tower_size < sizeof(*floor4)) ||
1253         (floor4->count_lhs != sizeof(floor4->protid)))
1254         return EPT_S_NOT_REGISTERED;
1255
1256     for(i = 0; i < ARRAYSIZE(conn_protseq_list); i++)
1257         if ((protocol_floor->protid == conn_protseq_list[i].epm_protocols[0]) &&
1258             (floor4->protid == conn_protseq_list[i].epm_protocols[1]))
1259         {
1260             protseq_ops = &conn_protseq_list[i];
1261             break;
1262         }
1263
1264     if (!protseq_ops)
1265         return EPT_S_NOT_REGISTERED;
1266
1267     status = protseq_ops->parse_top_of_tower(tower_data, tower_size, networkaddr, endpoint);
1268
1269     if ((status == RPC_S_OK) && protseq)
1270     {
1271         *protseq = I_RpcAllocate(strlen(protseq_ops->name) + 1);
1272         strcpy(*protseq, protseq_ops->name);
1273     }
1274
1275     return status;
1276 }
1277
1278 /***********************************************************************
1279  *             RpcNetworkIsProtseqValidW (RPCRT4.@)
1280  *
1281  * Checks if the given protocol sequence is known by the RPC system.
1282  * If it is, returns RPC_S_OK, otherwise RPC_S_PROTSEQ_NOT_SUPPORTED.
1283  *
1284  */
1285 RPC_STATUS WINAPI RpcNetworkIsProtseqValidW(RPC_WSTR protseq)
1286 {
1287   char ps[0x10];
1288
1289   WideCharToMultiByte(CP_ACP, 0, protseq, -1,
1290                       ps, sizeof ps, NULL, NULL);
1291   if (rpcrt4_get_conn_protseq_ops(ps))
1292     return RPC_S_OK;
1293
1294   FIXME("Unknown protseq %s\n", debugstr_w(protseq));
1295
1296   return RPC_S_INVALID_RPC_PROTSEQ;
1297 }
1298
1299 /***********************************************************************
1300  *             RpcNetworkIsProtseqValidA (RPCRT4.@)
1301  */
1302 RPC_STATUS WINAPI RpcNetworkIsProtseqValidA(RPC_CSTR protseq)
1303 {
1304   UNICODE_STRING protseqW;
1305
1306   if (RtlCreateUnicodeStringFromAsciiz(&protseqW, (char*)protseq))
1307   {
1308     RPC_STATUS ret = RpcNetworkIsProtseqValidW(protseqW.Buffer);
1309     RtlFreeUnicodeString(&protseqW);
1310     return ret;
1311   }
1312   return RPC_S_OUT_OF_MEMORY;
1313 }