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