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  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  *
  23  */
  24
  25 #include "config.h"
  26
  27 #include <stdarg.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <assert.h>
  31 #include <errno.h>
  32
  33 #ifdef HAVE_UNISTD_H
  34 # include <unistd.h>
  35 #endif
  36 #include <fcntl.h>
  37 #include <stdlib.h>
  38 #include <sys/types.h>
  39 #ifdef HAVE_SYS_SOCKET_H
  40 # include <sys/socket.h>
  41 #endif
  42 #ifdef HAVE_NETINET_IN_H
  43 # include <netinet/in.h>
  44 #endif
  45 #ifdef HAVE_ARPA_INET_H
  46 # include <arpa/inet.h>
  47 #endif
  48 #ifdef HAVE_NETDB_H
  49 #include <netdb.h>
  50 #endif
  51
  52 #include "windef.h"
  53 #include "winbase.h"
  54 #include "winnls.h"
  55 #include "winerror.h"
  56 #include "winreg.h"
  57 #include "winternl.h"
  58 #include "wine/unicode.h"
  59
  60 #include "rpc.h"
  61 #include "rpcndr.h"
  62
  63 #include "wine/debug.h"
  64
  65 #include "rpc_binding.h"
  66 #include "rpc_message.h"
  67 #include "epm_towers.h"
  68
  69 WINE_DEFAULT_DEBUG_CHANNEL(rpc);
  70
  71 static CRITICAL_SECTION connection_pool_cs;
  72 static CRITICAL_SECTION_DEBUG connection_pool_cs_debug =
  73 {
  74     0, 0, &connection_pool_cs,
  75     { &connection_pool_cs_debug.ProcessLocksList, &connection_pool_cs_debug.ProcessLocksList },
  76       0, 0, { (DWORD_PTR)(__FILE__ ": connection_pool") }
  77 };
  78 static CRITICAL_SECTION connection_pool_cs = { &connection_pool_cs_debug, -1, 0, 0, 0, 0 };
  79
  80 static struct list connection_pool = LIST_INIT(connection_pool);
  81
  82 /**** ncacn_np support ****/
  83
  84 typedef struct _RpcConnection_np
  85 {
  86   RpcConnection common;
  87   HANDLE pipe, thread;
  88   OVERLAPPED ovl;
  89 } RpcConnection_np;
  90
  91 static RpcConnection *rpcrt4_conn_np_alloc(void)
  92 {
  93   RpcConnection_np *npc = HeapAlloc(GetProcessHeap(), 0, sizeof(RpcConnection_np));
  94   if (npc)
  95   {
  96     npc->pipe = NULL;
  97     npc->thread = NULL;
  98     memset(&npc->ovl, 0, sizeof(npc->ovl));
  99   }
 100   return &npc->common;
 101 }
 102
 103 static RPC_STATUS rpcrt4_connect_pipe(RpcConnection *Connection, LPCSTR pname)
 104 {
 105   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 106   TRACE("listening on %s\n", pname);
 107
 108   npc->pipe = CreateNamedPipeA(pname, PIPE_ACCESS_DUPLEX,
 109                                PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE,
 110                                PIPE_UNLIMITED_INSTANCES,
 111                                RPC_MAX_PACKET_SIZE, RPC_MAX_PACKET_SIZE, 5000, NULL);
 112   if (npc->pipe == INVALID_HANDLE_VALUE) {
 113     WARN("CreateNamedPipe failed with error %ld\n", GetLastError());
 114     return RPC_S_SERVER_UNAVAILABLE;
 115   }
 116
 117   memset(&npc->ovl, 0, sizeof(npc->ovl));
 118   npc->ovl.hEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
 119   if (ConnectNamedPipe(npc->pipe, &npc->ovl))
 120      return RPC_S_OK;
 121
 122   WARN("Couldn't ConnectNamedPipe (error was %ld)\n", GetLastError());
 123   if (GetLastError() == ERROR_PIPE_CONNECTED) {
 124     SetEvent(npc->ovl.hEvent);
 125     return RPC_S_OK;
 126   }
 127   if (GetLastError() == ERROR_IO_PENDING) {
 128     /* FIXME: looks like we need to GetOverlappedResult here? */
 129     return RPC_S_OK;
 130   }
 131   return RPC_S_SERVER_UNAVAILABLE;
 132 }
 133
 134 static RPC_STATUS rpcrt4_open_pipe(RpcConnection *Connection, LPCSTR pname, BOOL wait)
 135 {
 136   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 137   HANDLE pipe;
 138   DWORD err, dwMode;
 139
 140   TRACE("connecting to %s\n", pname);
 141
 142   while (TRUE) {
 143     pipe = CreateFileA(pname, GENERIC_READ|GENERIC_WRITE, 0, NULL,
 144                        OPEN_EXISTING, 0, 0);
 145     if (pipe != INVALID_HANDLE_VALUE) break;
 146     err = GetLastError();
 147     if (err == ERROR_PIPE_BUSY) {
 148       TRACE("connection failed, error=%lx\n", err);
 149       return RPC_S_SERVER_TOO_BUSY;
 150     }
 151     if (!wait)
 152       return RPC_S_SERVER_UNAVAILABLE;
 153     if (!WaitNamedPipeA(pname, NMPWAIT_WAIT_FOREVER)) {
 154       err = GetLastError();
 155       WARN("connection failed, error=%lx\n", err);
 156       return RPC_S_SERVER_UNAVAILABLE;
 157     }
 158   }
 159
 160   /* success */
 161   memset(&npc->ovl, 0, sizeof(npc->ovl));
 162   /* pipe is connected; change to message-read mode. */
 163   dwMode = PIPE_READMODE_MESSAGE;
 164   SetNamedPipeHandleState(pipe, &dwMode, NULL, NULL);
 165   npc->ovl.hEvent = CreateEventW(NULL, TRUE, FALSE, NULL);
 166   npc->pipe = pipe;
 167
 168   return RPC_S_OK;
 169 }
 170
 171 static RPC_STATUS rpcrt4_ncalrpc_open(RpcConnection* Connection)
 172 {
 173   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 174   static LPCSTR prefix = "\\\\.\\pipe\\lrpc\\";
 175   RPC_STATUS r;
 176   LPSTR pname;
 177
 178   /* already connected? */
 179   if (npc->pipe)
 180     return RPC_S_OK;
 181
 182   /* protseq=ncalrpc: supposed to use NT LPC ports,
 183    * but we'll implement it with named pipes for now */
 184   pname = I_RpcAllocate(strlen(prefix) + strlen(Connection->Endpoint) + 1);
 185   strcat(strcpy(pname, prefix), Connection->Endpoint);
 186
 187   if (Connection->server)
 188     r = rpcrt4_connect_pipe(Connection, pname);
 189   else
 190     r = rpcrt4_open_pipe(Connection, pname, TRUE);
 191   I_RpcFree(pname);
 192
 193   return r;
 194 }
 195
 196 static RPC_STATUS rpcrt4_ncacn_np_open(RpcConnection* Connection)
 197 {
 198   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 199   static LPCSTR prefix = "\\\\.";
 200   RPC_STATUS r;
 201   LPSTR pname;
 202
 203   /* already connected? */
 204   if (npc->pipe)
 205     return RPC_S_OK;
 206
 207   /* protseq=ncacn_np: named pipes */
 208   pname = I_RpcAllocate(strlen(prefix) + strlen(Connection->Endpoint) + 1);
 209   strcat(strcpy(pname, prefix), Connection->Endpoint);
 210   if (Connection->server)
 211     r = rpcrt4_connect_pipe(Connection, pname);
 212   else
 213     r = rpcrt4_open_pipe(Connection, pname, FALSE);
 214   I_RpcFree(pname);
 215
 216   return r;
 217 }
 218
 219 static HANDLE rpcrt4_conn_np_get_connect_event(RpcConnection *Connection)
 220 {
 221   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 222   return npc->ovl.hEvent;
 223 }
 224
 225 static RPC_STATUS rpcrt4_conn_np_handoff(RpcConnection *old_conn, RpcConnection *new_conn)
 226 {
 227   RpcConnection_np *old_npc = (RpcConnection_np *) old_conn;
 228   RpcConnection_np *new_npc = (RpcConnection_np *) new_conn;
 229   /* because of the way named pipes work, we'll transfer the connected pipe
 230    * to the child, then reopen the server binding to continue listening */
 231
 232   new_npc->pipe = old_npc->pipe;
 233   new_npc->ovl = old_npc->ovl;
 234   old_npc->pipe = 0;
 235   memset(&old_npc->ovl, 0, sizeof(old_npc->ovl));
 236   return RPCRT4_OpenConnection(old_conn);
 237 }
 238
 239 static int rpcrt4_conn_np_read(RpcConnection *Connection,
 240                         void *buffer, unsigned int count)
 241 {
 242   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 243   DWORD dwRead = 0;
 244   if (!ReadFile(npc->pipe, buffer, count, &dwRead, NULL) &&
 245       (GetLastError() != ERROR_MORE_DATA))
 246     return -1;
 247   return dwRead;
 248 }
 249
 250 static int rpcrt4_conn_np_write(RpcConnection *Connection,
 251                              const void *buffer, unsigned int count)
 252 {
 253   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 254   DWORD dwWritten = 0;
 255   if (!WriteFile(npc->pipe, buffer, count, &dwWritten, NULL))
 256     return -1;
 257   return dwWritten;
 258 }
 259
 260 static int rpcrt4_conn_np_close(RpcConnection *Connection)
 261 {
 262   RpcConnection_np *npc = (RpcConnection_np *) Connection;
 263   if (npc->pipe) {
 264     FlushFileBuffers(npc->pipe);
 265     CloseHandle(npc->pipe);
 266     npc->pipe = 0;
 267   }
 268   if (npc->ovl.hEvent) {
 269     CloseHandle(npc->ovl.hEvent);
 270     npc->ovl.hEvent = 0;
 271   }
 272   return 0;
 273 }
 274
 275 static size_t rpcrt4_ncacn_np_get_top_of_tower(unsigned char *tower_data,
 276                                                const char *networkaddr,
 277                                                const char *endpoint)
 278 {
 279     twr_empty_floor_t *smb_floor;
 280     twr_empty_floor_t *nb_floor;
 281     size_t size;
 282     size_t networkaddr_size;
 283     size_t endpoint_size;
 284
 285     TRACE("(%p, %s, %s)\n", tower_data, networkaddr, endpoint);
 286
 287     networkaddr_size = strlen(networkaddr) + 1;
 288     endpoint_size = strlen(endpoint) + 1;
 289     size = sizeof(*smb_floor) + endpoint_size + sizeof(*nb_floor) + networkaddr_size;
 290
 291     if (!tower_data)
 292         return size;
 293
 294     smb_floor = (twr_empty_floor_t *)tower_data;
 295
 296     tower_data += sizeof(*smb_floor);
 297
 298     smb_floor->count_lhs = sizeof(smb_floor->protid);
 299     smb_floor->protid = EPM_PROTOCOL_SMB;
 300     smb_floor->count_rhs = endpoint_size;
 301
 302     memcpy(tower_data, endpoint, endpoint_size);
 303     tower_data += endpoint_size;
 304
 305     nb_floor = (twr_empty_floor_t *)tower_data;
 306
 307     tower_data += sizeof(*nb_floor);
 308
 309     nb_floor->count_lhs = sizeof(nb_floor->protid);
 310     nb_floor->protid = EPM_PROTOCOL_NETBIOS;
 311     nb_floor->count_rhs = networkaddr_size;
 312
 313     memcpy(tower_data, networkaddr, networkaddr_size);
 314     tower_data += networkaddr_size;
 315
 316     return size;
 317 }
 318
 319 static RPC_STATUS rpcrt4_ncacn_np_parse_top_of_tower(const unsigned char *tower_data,
 320                                                      size_t tower_size,
 321                                                      char **networkaddr,
 322                                                      char **endpoint)
 323 {
 324     const twr_empty_floor_t *smb_floor = (const twr_empty_floor_t *)tower_data;
 325     const twr_empty_floor_t *nb_floor;
 326
 327     TRACE("(%p, %d, %p, %p)\n", tower_data, (int)tower_size, networkaddr, endpoint);
 328
 329     if (tower_size < sizeof(*smb_floor))
 330         return EPT_S_NOT_REGISTERED;
 331
 332     tower_data += sizeof(*smb_floor);
 333     tower_size -= sizeof(*smb_floor);
 334
 335     if ((smb_floor->count_lhs != sizeof(smb_floor->protid)) ||
 336         (smb_floor->protid != EPM_PROTOCOL_SMB) ||
 337         (smb_floor->count_rhs > tower_size))
 338         return EPT_S_NOT_REGISTERED;
 339
 340     if (endpoint)
 341     {
 342         *endpoint = I_RpcAllocate(smb_floor->count_rhs);
 343         if (!*endpoint)
 344             return RPC_S_OUT_OF_RESOURCES;
 345         memcpy(*endpoint, tower_data, smb_floor->count_rhs);
 346     }
 347     tower_data += smb_floor->count_rhs;
 348     tower_size -= smb_floor->count_rhs;
 349
 350     if (tower_size < sizeof(*nb_floor))
 351         return EPT_S_NOT_REGISTERED;
 352
 353     nb_floor = (const twr_empty_floor_t *)tower_data;
 354
 355     tower_data += sizeof(*nb_floor);
 356     tower_size -= sizeof(*nb_floor);
 357
 358     if ((nb_floor->count_lhs != sizeof(nb_floor->protid)) ||
 359         (nb_floor->protid != EPM_PROTOCOL_NETBIOS) ||
 360         (nb_floor->count_rhs > tower_size))
 361         return EPT_S_NOT_REGISTERED;
 362
 363     if (networkaddr)
 364     {
 365         *networkaddr = I_RpcAllocate(nb_floor->count_rhs);
 366         if (!*networkaddr)
 367         {
 368             if (endpoint)
 369             {
 370                 I_RpcFree(*endpoint);
 371                 *endpoint = NULL;
 372             }
 373             return RPC_S_OUT_OF_RESOURCES;
 374         }
 375         memcpy(*networkaddr, tower_data, nb_floor->count_rhs);
 376     }
 377
 378     return RPC_S_OK;
 379 }
 380
 381 static size_t rpcrt4_ncalrpc_get_top_of_tower(unsigned char *tower_data,
 382                                               const char *networkaddr,
 383                                               const char *endpoint)
 384 {
 385     twr_empty_floor_t *pipe_floor;
 386     size_t size;
 387     size_t endpoint_size;
 388
 389     TRACE("(%p, %s, %s)\n", tower_data, networkaddr, endpoint);
 390
 391     endpoint_size = strlen(networkaddr) + 1;
 392     size = sizeof(*pipe_floor) + endpoint_size;
 393
 394     if (!tower_data)
 395         return size;
 396
 397     pipe_floor = (twr_empty_floor_t *)tower_data;
 398
 399     tower_data += sizeof(*pipe_floor);
 400
 401     pipe_floor->count_lhs = sizeof(pipe_floor->protid);
 402     pipe_floor->protid = EPM_PROTOCOL_SMB;
 403     pipe_floor->count_rhs = endpoint_size;
 404
 405     memcpy(tower_data, endpoint, endpoint_size);
 406     tower_data += endpoint_size;
 407
 408     return size;
 409 }
 410
 411 static RPC_STATUS rpcrt4_ncalrpc_parse_top_of_tower(const unsigned char *tower_data,
 412                                                     size_t tower_size,
 413                                                     char **networkaddr,
 414                                                     char **endpoint)
 415 {
 416     const twr_empty_floor_t *pipe_floor = (const twr_empty_floor_t *)tower_data;
 417
 418     TRACE("(%p, %d, %p, %p)\n", tower_data, (int)tower_size, networkaddr, endpoint);
 419
 420     *networkaddr = NULL;
 421     *endpoint = NULL;
 422
 423     if (tower_size < sizeof(*pipe_floor))
 424         return EPT_S_NOT_REGISTERED;
 425
 426     tower_data += sizeof(*pipe_floor);
 427     tower_size -= sizeof(*pipe_floor);
 428
 429     if ((pipe_floor->count_lhs != sizeof(pipe_floor->protid)) ||
 430         (pipe_floor->protid != EPM_PROTOCOL_SMB) ||
 431         (pipe_floor->count_rhs > tower_size))
 432         return EPT_S_NOT_REGISTERED;
 433
 434     if (endpoint)
 435     {
 436         *endpoint = I_RpcAllocate(pipe_floor->count_rhs);
 437         if (!*endpoint)
 438             return RPC_S_OUT_OF_RESOURCES;
 439         memcpy(*endpoint, tower_data, pipe_floor->count_rhs);
 440     }
 441
 442     return RPC_S_OK;
 443 }
 444
 445 /**** ncacn_ip_tcp support ****/
 446
 447 typedef struct _RpcConnection_tcp
 448 {
 449   RpcConnection common;
 450   int sock;
 451 } RpcConnection_tcp;
 452
 453 static RpcConnection *rpcrt4_conn_tcp_alloc(void)
 454 {
 455   RpcConnection_tcp *tcpc;
 456   tcpc = HeapAlloc(GetProcessHeap(), 0, sizeof(RpcConnection_tcp));
 457   if (tcpc)
 458     tcpc->sock = -1;
 459   return &tcpc->common;
 460 }
 461
 462 static RPC_STATUS rpcrt4_ncacn_ip_tcp_open(RpcConnection* Connection)
 463 {
 464   RpcConnection_tcp *tcpc = (RpcConnection_tcp *) Connection;
 465   int sock;
 466   int ret;
 467   struct addrinfo *ai;
 468   struct addrinfo *ai_cur;
 469   struct addrinfo hints;
 470
 471   TRACE("(%s, %s)\n", Connection->NetworkAddr, Connection->Endpoint);
 472
 473   if (Connection->server)
 474   {
 475     ERR("ncacn_ip_tcp servers not supported yet\n");
 476     return RPC_S_SERVER_UNAVAILABLE;
 477   }
 478
 479   if (tcpc->sock != -1)
 480     return RPC_S_OK;
 481
 482   hints.ai_flags          = 0;
 483   hints.ai_family         = PF_UNSPEC;
 484   hints.ai_socktype       = SOCK_STREAM;
 485   hints.ai_protocol       = IPPROTO_TCP;
 486   hints.ai_addrlen        = 0;
 487   hints.ai_addr           = NULL;
 488   hints.ai_canonname      = NULL;
 489   hints.ai_next           = NULL;
 490
 491   ret = getaddrinfo(Connection->NetworkAddr, Connection->Endpoint, &hints, &ai);
 492   if (ret)
 493   {
 494     ERR("getaddrinfo failed: %s\n", gai_strerror(ret));
 495     return RPC_S_SERVER_UNAVAILABLE;
 496   }
 497
 498   for (ai_cur = ai; ai_cur; ai_cur = ai->ai_next)
 499   {
 500     if (TRACE_ON(rpc))
 501     {
 502       char host[256];
 503       char service[256];
 504       getnameinfo(ai_cur->ai_addr, ai_cur->ai_addrlen,
 505         host, sizeof(host), service, sizeof(service),
 506         NI_NUMERICHOST | NI_NUMERICSERV);
 507       TRACE("trying %s:%s\n", host, service);
 508     }
 509
 510     sock = socket(ai_cur->ai_family, ai_cur->ai_socktype, ai_cur->ai_protocol);
 511     if (sock < 0)
 512     {
 513       WARN("socket() failed\n");
 514       continue;
 515     }
 516
 517     if (0>connect(sock, ai_cur->ai_addr, ai_cur->ai_addrlen))
 518     {
 519       WARN("connect() failed\n");
 520       close(sock);
 521       continue;
 522     }
 523
 524     tcpc->sock = sock;
 525
 526     freeaddrinfo(ai);
 527     TRACE("connected\n");
 528     return RPC_S_OK;
 529   }
 530
 531   freeaddrinfo(ai);
 532   ERR("couldn't connect to %s:%s\n", Connection->NetworkAddr, Connection->Endpoint);
 533   return RPC_S_SERVER_UNAVAILABLE;
 534 }
 535
 536 static HANDLE rpcrt4_conn_tcp_get_wait_handle(RpcConnection *Connection)
 537 {
 538   assert(0);
 539   return 0;
 540 }
 541
 542 static RPC_STATUS rpcrt4_conn_tcp_handoff(RpcConnection *old_conn, RpcConnection *new_conn)
 543 {
 544   assert(0);
 545   return RPC_S_SERVER_UNAVAILABLE;
 546 }
 547
 548 static int rpcrt4_conn_tcp_read(RpcConnection *Connection,
 549                                 void *buffer, unsigned int count)
 550 {
 551   RpcConnection_tcp *tcpc = (RpcConnection_tcp *) Connection;
 552   int r = recv(tcpc->sock, buffer, count, MSG_WAITALL);
 553   TRACE("%d %p %u -> %d\n", tcpc->sock, buffer, count, r);
 554   return r;
 555 }
 556
 557 static int rpcrt4_conn_tcp_write(RpcConnection *Connection,
 558                                  const void *buffer, unsigned int count)
 559 {
 560   RpcConnection_tcp *tcpc = (RpcConnection_tcp *) Connection;
 561   int r = write(tcpc->sock, buffer, count);
 562   TRACE("%d %p %u -> %d\n", tcpc->sock, buffer, count, r);
 563   return r;
 564 }
 565
 566 static int rpcrt4_conn_tcp_close(RpcConnection *Connection)
 567 {
 568   RpcConnection_tcp *tcpc = (RpcConnection_tcp *) Connection;
 569
 570   TRACE("%d\n", tcpc->sock);
 571   if (tcpc->sock != -1)
 572     close(tcpc->sock);
 573   tcpc->sock = -1;
 574   return 0;
 575 }
 576
 577 static size_t rpcrt4_ncacn_ip_tcp_get_top_of_tower(unsigned char *tower_data,
 578                                                    const char *networkaddr,
 579                                                    const char *endpoint)
 580 {
 581     twr_tcp_floor_t *tcp_floor;
 582     twr_ipv4_floor_t *ipv4_floor;
 583     struct addrinfo *ai;
 584     struct addrinfo hints;
 585     int ret;
 586     size_t size = sizeof(*tcp_floor) + sizeof(*ipv4_floor);
 587
 588     TRACE("(%p, %s, %s)\n", tower_data, networkaddr, endpoint);
 589
 590     if (!tower_data)
 591         return size;
 592
 593     tcp_floor = (twr_tcp_floor_t *)tower_data;
 594     tower_data += sizeof(*tcp_floor);
 595
 596     ipv4_floor = (twr_ipv4_floor_t *)tower_data;
 597
 598     tcp_floor->count_lhs = sizeof(tcp_floor->protid);
 599     tcp_floor->protid = EPM_PROTOCOL_TCP;
 600     tcp_floor->count_rhs = sizeof(tcp_floor->port);
 601
 602     ipv4_floor->count_lhs = sizeof(ipv4_floor->protid);
 603     ipv4_floor->protid = EPM_PROTOCOL_IP;
 604     ipv4_floor->count_rhs = sizeof(ipv4_floor->ipv4addr);
 605
 606     hints.ai_flags          = AI_NUMERICHOST;
 607     /* FIXME: only support IPv4 at the moment. how is IPv6 represented by the EPM? */
 608     hints.ai_family         = PF_INET;
 609     hints.ai_socktype       = SOCK_STREAM;
 610     hints.ai_protocol       = IPPROTO_TCP;
 611     hints.ai_addrlen        = 0;
 612     hints.ai_addr           = NULL;
 613     hints.ai_canonname      = NULL;
 614     hints.ai_next           = NULL;
 615
 616     ret = getaddrinfo(networkaddr, endpoint, &hints, &ai);
 617     if (ret)
 618     {
 619         ret = getaddrinfo("0.0.0.0", endpoint, &hints, &ai);
 620         if (ret)
 621         {
 622             ERR("getaddrinfo failed: %s\n", gai_strerror(ret));
 623             return 0;
 624         }
 625     }
 626
 627     if (ai->ai_family == PF_INET)
 628     {
 629         const struct sockaddr_in *sin = (const struct sockaddr_in *)ai->ai_addr;
 630         tcp_floor->port = sin->sin_port;
 631         ipv4_floor->ipv4addr = sin->sin_addr.s_addr;
 632     }
 633     else
 634     {
 635         ERR("unexpected protocol family %d\n", ai->ai_family);
 636         return 0;
 637     }
 638
 639     freeaddrinfo(ai);
 640
 641     return size;
 642 }
 643
 644 static RPC_STATUS rpcrt4_ncacn_ip_tcp_parse_top_of_tower(const unsigned char *tower_data,
 645                                                          size_t tower_size,
 646                                                          char **networkaddr,
 647                                                          char **endpoint)
 648 {
 649     const twr_tcp_floor_t *tcp_floor = (const twr_tcp_floor_t *)tower_data;
 650     const twr_ipv4_floor_t *ipv4_floor;
 651     struct in_addr in_addr;
 652
 653     TRACE("(%p, %d, %p, %p)\n", tower_data, (int)tower_size, networkaddr, endpoint);
 654
 655     if (tower_size < sizeof(*tcp_floor))
 656         return EPT_S_NOT_REGISTERED;
 657
 658     tower_data += sizeof(*tcp_floor);
 659     tower_size -= sizeof(*tcp_floor);
 660
 661     if (tower_size < sizeof(*ipv4_floor))
 662         return EPT_S_NOT_REGISTERED;
 663
 664     ipv4_floor = (const twr_ipv4_floor_t *)tower_data;
 665
 666     if ((tcp_floor->count_lhs != sizeof(tcp_floor->protid)) ||
 667         (tcp_floor->protid != EPM_PROTOCOL_TCP) ||
 668         (tcp_floor->count_rhs != sizeof(tcp_floor->port)) ||
 669         (ipv4_floor->count_lhs != sizeof(ipv4_floor->protid)) ||
 670         (ipv4_floor->protid != EPM_PROTOCOL_IP) ||
 671         (ipv4_floor->count_rhs != sizeof(ipv4_floor->ipv4addr)))
 672         return EPT_S_NOT_REGISTERED;
 673
 674     if (endpoint)
 675     {
 676         *endpoint = I_RpcAllocate(6 /* sizeof("65535") + 1 */);
 677         if (!*endpoint)
 678             return RPC_S_OUT_OF_RESOURCES;
 679         sprintf(*endpoint, "%u", ntohs(tcp_floor->port));
 680     }
 681
 682     if (networkaddr)
 683     {
 684         *networkaddr = I_RpcAllocate(INET_ADDRSTRLEN);
 685         if (!*networkaddr)
 686         {
 687             if (endpoint)
 688             {
 689                 I_RpcFree(*endpoint);
 690                 *endpoint = NULL;
 691             }
 692             return RPC_S_OUT_OF_RESOURCES;
 693         }
 694         in_addr.s_addr = ipv4_floor->ipv4addr;
 695         if (!inet_ntop(AF_INET, &in_addr, *networkaddr, INET_ADDRSTRLEN))
 696         {
 697             ERR("inet_ntop: %s\n", strerror(errno));
 698             I_RpcFree(*networkaddr);
 699             *networkaddr = NULL;
 700             if (endpoint)
 701             {
 702                 I_RpcFree(*endpoint);
 703                 *endpoint = NULL;
 704             }
 705             return EPT_S_NOT_REGISTERED;
 706         }
 707     }
 708
 709     return RPC_S_OK;
 710 }
 711
 712 static const struct connection_ops protseq_list[] = {
 713   { "ncacn_np",
 714     { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_SMB },
 715     rpcrt4_conn_np_alloc,
 716     rpcrt4_ncacn_np_open,
 717     rpcrt4_conn_np_get_connect_event,
 718     rpcrt4_conn_np_handoff,
 719     rpcrt4_conn_np_read,
 720     rpcrt4_conn_np_write,
 721     rpcrt4_conn_np_close,
 722     rpcrt4_ncacn_np_get_top_of_tower,
 723     rpcrt4_ncacn_np_parse_top_of_tower,
 724   },
 725   { "ncalrpc",
 726     { EPM_PROTOCOL_NCALRPC, EPM_PROTOCOL_PIPE },
 727     rpcrt4_conn_np_alloc,
 728     rpcrt4_ncalrpc_open,
 729     rpcrt4_conn_np_get_connect_event,
 730     rpcrt4_conn_np_handoff,
 731     rpcrt4_conn_np_read,
 732     rpcrt4_conn_np_write,
 733     rpcrt4_conn_np_close,
 734     rpcrt4_ncalrpc_get_top_of_tower,
 735     rpcrt4_ncalrpc_parse_top_of_tower,
 736   },
 737   { "ncacn_ip_tcp",
 738     { EPM_PROTOCOL_NCACN, EPM_PROTOCOL_TCP },
 739     rpcrt4_conn_tcp_alloc,
 740     rpcrt4_ncacn_ip_tcp_open,
 741     rpcrt4_conn_tcp_get_wait_handle,
 742     rpcrt4_conn_tcp_handoff,
 743     rpcrt4_conn_tcp_read,
 744     rpcrt4_conn_tcp_write,
 745     rpcrt4_conn_tcp_close,
 746     rpcrt4_ncacn_ip_tcp_get_top_of_tower,
 747     rpcrt4_ncacn_ip_tcp_parse_top_of_tower,
 748   }
 749 };
 750
 751 #define MAX_PROTSEQ (sizeof protseq_list / sizeof protseq_list[0])
 752
 753 static const struct connection_ops *rpcrt4_get_protseq_ops(const char *protseq)
 754 {
 755   int i;
 756   for(i=0; i<MAX_PROTSEQ; i++)
 757     if (!strcmp(protseq_list[i].name, protseq))
 758       return &protseq_list[i];
 759   return NULL;
 760 }
 761
 762 /**** interface to rest of code ****/
 763
 764 RPC_STATUS RPCRT4_OpenConnection(RpcConnection* Connection)
 765 {
 766   TRACE("(Connection == ^%p)\n", Connection);
 767
 768   return Connection->ops->open_connection(Connection);
 769 }
 770
 771 RPC_STATUS RPCRT4_CloseConnection(RpcConnection* Connection)
 772 {
 773   TRACE("(Connection == ^%p)\n", Connection);
 774   rpcrt4_conn_close(Connection);
 775   return RPC_S_OK;
 776 }
 777
 778 RPC_STATUS RPCRT4_CreateConnection(RpcConnection** Connection, BOOL server,
 779     LPCSTR Protseq, LPCSTR NetworkAddr, LPCSTR Endpoint,
 780     LPCSTR NetworkOptions, RpcAuthInfo* AuthInfo, RpcBinding* Binding)
 781 {
 782   const struct connection_ops *ops;
 783   RpcConnection* NewConnection;
 784
 785   ops = rpcrt4_get_protseq_ops(Protseq);
 786   if (!ops)
 787     return RPC_S_PROTSEQ_NOT_SUPPORTED;
 788
 789   NewConnection = ops->alloc();
 790   NewConnection->Next = NULL;
 791   NewConnection->server = server;
 792   NewConnection->ops = ops;
 793   NewConnection->NetworkAddr = RPCRT4_strdupA(NetworkAddr);
 794   NewConnection->Endpoint = RPCRT4_strdupA(Endpoint);
 795   NewConnection->Used = Binding;
 796   NewConnection->MaxTransmissionSize = RPC_MAX_PACKET_SIZE;
 797   memset(&NewConnection->ActiveInterface, 0, sizeof(NewConnection->ActiveInterface));
 798   NewConnection->NextCallId = 1;
 799
 800   memset(&NewConnection->ctx, 0, sizeof(NewConnection->ctx));
 801   if (AuthInfo) RpcAuthInfo_AddRef(AuthInfo);
 802   NewConnection->AuthInfo = AuthInfo;
 803   list_init(&NewConnection->conn_pool_entry);
 804
 805   TRACE("connection: %p\n", NewConnection);
 806   *Connection = NewConnection;
 807
 808   return RPC_S_OK;
 809 }
 810
 811 RpcConnection *RPCRT4_GetIdleConnection(const RPC_SYNTAX_IDENTIFIER *InterfaceId,
 812     const RPC_SYNTAX_IDENTIFIER *TransferSyntax, LPCSTR Protseq, LPCSTR NetworkAddr,
 813     LPCSTR Endpoint, RpcAuthInfo* AuthInfo)
 814 {
 815   RpcConnection *Connection;
 816   /* try to find a compatible connection from the connection pool */
 817   EnterCriticalSection(&connection_pool_cs);
 818   LIST_FOR_EACH_ENTRY(Connection, &connection_pool, RpcConnection, conn_pool_entry)
 819     if ((Connection->AuthInfo == AuthInfo) &&
 820         !memcmp(&Connection->ActiveInterface, InterfaceId,
 821            sizeof(RPC_SYNTAX_IDENTIFIER)) &&
 822         !strcmp(rpcrt4_conn_get_name(Connection), Protseq) &&
 823         !strcmp(Connection->NetworkAddr, NetworkAddr) &&
 824         !strcmp(Connection->Endpoint, Endpoint))
 825     {
 826       list_remove(&Connection->conn_pool_entry);
 827       LeaveCriticalSection(&connection_pool_cs);
 828       TRACE("got connection from pool %p\n", Connection);
 829       return Connection;
 830     }
 831
 832   LeaveCriticalSection(&connection_pool_cs);
 833   return NULL;
 834 }
 835
 836 void RPCRT4_ReleaseIdleConnection(RpcConnection *Connection)
 837 {
 838   assert(!Connection->server);
 839   EnterCriticalSection(&connection_pool_cs);
 840   list_add_head(&connection_pool, &Connection->conn_pool_entry);
 841   LeaveCriticalSection(&connection_pool_cs);
 842 }
 843
 844
 845 RPC_STATUS RPCRT4_SpawnConnection(RpcConnection** Connection, RpcConnection* OldConnection)
 846 {
 847   RPC_STATUS err;
 848
 849   err = RPCRT4_CreateConnection(Connection, OldConnection->server,
 850                                 rpcrt4_conn_get_name(OldConnection),
 851                                 OldConnection->NetworkAddr,
 852                                 OldConnection->Endpoint, NULL,
 853                                 OldConnection->AuthInfo, NULL);
 854   if (err == RPC_S_OK)
 855     rpcrt4_conn_handoff(OldConnection, *Connection);
 856   return err;
 857 }
 858
 859 RPC_STATUS RPCRT4_DestroyConnection(RpcConnection* Connection)
 860 {
 861   TRACE("connection: %p\n", Connection);
 862
 863   RPCRT4_CloseConnection(Connection);
 864   RPCRT4_strfree(Connection->Endpoint);
 865   RPCRT4_strfree(Connection->NetworkAddr);
 866   if (Connection->AuthInfo) RpcAuthInfo_Release(Connection->AuthInfo);
 867   HeapFree(GetProcessHeap(), 0, Connection);
 868   return RPC_S_OK;
 869 }
 870
 871 RPC_STATUS RpcTransport_GetTopOfTower(unsigned char *tower_data,
 872                                       size_t *tower_size,
 873                                       const char *protseq,
 874                                       const char *networkaddr,
 875                                       const char *endpoint)
 876 {
 877     twr_empty_floor_t *protocol_floor;
 878     const struct connection_ops *protseq_ops = rpcrt4_get_protseq_ops(protseq);
 879
 880     *tower_size = 0;
 881
 882     if (!protseq_ops)
 883         return RPC_S_INVALID_RPC_PROTSEQ;
 884
 885     if (!tower_data)
 886     {
 887         *tower_size = sizeof(*protocol_floor);
 888         *tower_size += protseq_ops->get_top_of_tower(NULL, networkaddr, endpoint);
 889         return RPC_S_OK;
 890     }
 891
 892     protocol_floor = (twr_empty_floor_t *)tower_data;
 893     protocol_floor->count_lhs = sizeof(protocol_floor->protid);
 894     protocol_floor->protid = protseq_ops->epm_protocols[0];
 895     protocol_floor->count_rhs = 0;
 896
 897     tower_data += sizeof(*protocol_floor);
 898
 899     *tower_size = protseq_ops->get_top_of_tower(tower_data, networkaddr, endpoint);
 900     if (!*tower_size)
 901         return EPT_S_NOT_REGISTERED;
 902
 903     *tower_size += sizeof(*protocol_floor);
 904
 905     return RPC_S_OK;
 906 }
 907
 908 RPC_STATUS RpcTransport_ParseTopOfTower(const unsigned char *tower_data,
 909                                         size_t tower_size,
 910                                         char **protseq,
 911                                         char **networkaddr,
 912                                         char **endpoint)
 913 {
 914     const twr_empty_floor_t *protocol_floor;
 915     const twr_empty_floor_t *floor4;
 916     const struct connection_ops *protseq_ops = NULL;
 917     RPC_STATUS status;
 918     int i;
 919
 920     if (tower_size < sizeof(*protocol_floor))
 921         return EPT_S_NOT_REGISTERED;
 922
 923     protocol_floor = (const twr_empty_floor_t *)tower_data;
 924     tower_data += sizeof(*protocol_floor);
 925     tower_size -= sizeof(*protocol_floor);
 926     if ((protocol_floor->count_lhs != sizeof(protocol_floor->protid)) ||
 927         (protocol_floor->count_rhs > tower_size))
 928         return EPT_S_NOT_REGISTERED;
 929     tower_data += protocol_floor->count_rhs;
 930     tower_size -= protocol_floor->count_rhs;
 931
 932     floor4 = (const twr_empty_floor_t *)tower_data;
 933     if ((tower_size < sizeof(*floor4)) ||
 934         (floor4->count_lhs != sizeof(floor4->protid)))
 935         return EPT_S_NOT_REGISTERED;
 936
 937     for(i = 0; i < MAX_PROTSEQ; i++)
 938         if ((protocol_floor->protid == protseq_list[i].epm_protocols[0]) &&
 939             (floor4->protid == protseq_list[i].epm_protocols[1]))
 940         {
 941             protseq_ops = &protseq_list[i];
 942             break;
 943         }
 944
 945     if (!protseq_ops)
 946         return EPT_S_NOT_REGISTERED;
 947
 948     status = protseq_ops->parse_top_of_tower(tower_data, tower_size, networkaddr, endpoint);
 949
 950     if ((status == RPC_S_OK) && protseq)
 951     {
 952         *protseq = I_RpcAllocate(strlen(protseq_ops->name) + 1);
 953         strcpy(*protseq, protseq_ops->name);
 954     }
 955
 956     return status;
 957 }
 958
 959 /***********************************************************************
 960  *             RpcNetworkIsProtseqValidW (RPCRT4.@)
 961  *
 962  * Checks if the given protocol sequence is known by the RPC system.
 963  * If it is, returns RPC_S_OK, otherwise RPC_S_PROTSEQ_NOT_SUPPORTED.
 964  *
 965  */
 966 RPC_STATUS WINAPI RpcNetworkIsProtseqValidW(RPC_WSTR protseq)
 967 {
 968   char ps[0x10];
 969
 970   WideCharToMultiByte(CP_ACP, 0, protseq, -1,
 971                       ps, sizeof ps, NULL, NULL);
 972   if (rpcrt4_get_protseq_ops(ps))
 973     return RPC_S_OK;
 974
 975   FIXME("Unknown protseq %s\n", debugstr_w(protseq));
 976
 977   return RPC_S_INVALID_RPC_PROTSEQ;
 978 }
 979
 980 /***********************************************************************
 981  *             RpcNetworkIsProtseqValidA (RPCRT4.@)
 982  */
 983 RPC_STATUS WINAPI RpcNetworkIsProtseqValidA(RPC_CSTR protseq)
 984 {
 985   UNICODE_STRING protseqW;
 986
 987   if (RtlCreateUnicodeStringFromAsciiz(&protseqW, (char*)protseq))
 988   {
 989     RPC_STATUS ret = RpcNetworkIsProtseqValidW(protseqW.Buffer);
 990     RtlFreeUnicodeString(&protseqW);
 991     return ret;
 992   }
 993   return RPC_S_OUT_OF_MEMORY;
 994 }