source3/libsmb/libsmb_server.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    SMB client library implementation
   4    Copyright (C) Andrew Tridgell 1998
   5    Copyright (C) Richard Sharpe 2000, 2002
   6    Copyright (C) John Terpstra 2000
   7    Copyright (C) Tom Jansen (Ninja ISD) 2002
   8    Copyright (C) Derrell Lipman 2003-2008
   9    Copyright (C) Jeremy Allison 2007, 2008
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "libsmbclient.h"
  27 #include "libsmb_internal.h"
  28
  29
  30 /*
  31  * Check a server for being alive and well.
  32  * returns 0 if the server is in shape. Returns 1 on error
  33  *
  34  * Also useable outside libsmbclient to enable external cache
  35  * to do some checks too.
  36  */
  37 int
  38 SMBC_check_server(SMBCCTX * context,
  39                   SMBCSRV * server)
  40 {
  41         socklen_t size;
  42         struct sockaddr addr;
  43
  44         size = sizeof(addr);
  45         return (getpeername(server->cli->fd, &addr, &size) == -1);
  46 }
  47
  48 /*
  49  * Remove a server from the cached server list it's unused.
  50  * On success, 0 is returned. 1 is returned if the server could not be removed.
  51  *
  52  * Also useable outside libsmbclient
  53  */
  54 int
  55 SMBC_remove_unused_server(SMBCCTX * context,
  56                           SMBCSRV * srv)
  57 {
  58         SMBCFILE * file;
  59
  60         /* are we being fooled ? */
  61         if (!context || !context->internal->initialized || !srv) {
  62                 return 1;
  63         }
  64
  65         /* Check all open files/directories for a relation with this server */
  66         for (file = context->internal->files; file; file = file->next) {
  67                 if (file->srv == srv) {
  68                         /* Still used */
  69                         DEBUG(3, ("smbc_remove_usused_server: "
  70                                   "%p still used by %p.\n",
  71                                   srv, file));
  72                         return 1;
  73                 }
  74         }
  75
  76         DLIST_REMOVE(context->internal->servers, srv);
  77
  78         cli_shutdown(srv->cli);
  79         srv->cli = NULL;
  80
  81         DEBUG(3, ("smbc_remove_usused_server: %p removed.\n", srv));
  82
  83         smbc_getFunctionRemoveCachedServer(context)(context, srv);
  84
  85         SAFE_FREE(srv);
  86         return 0;
  87 }
  88
  89 /****************************************************************
  90  * Call the auth_fn with fixed size (fstring) buffers.
  91  ***************************************************************/
  92 void
  93 SMBC_call_auth_fn(TALLOC_CTX *ctx,
  94                   SMBCCTX *context,
  95                   const char *server,
  96                   const char *share,
  97                   char **pp_workgroup,
  98                   char **pp_username,
  99                   char **pp_password)
 100 {
 101         fstring workgroup;
 102         fstring username;
 103         fstring password;
 104         smbc_get_auth_data_with_context_fn auth_with_context_fn;
 105
 106         strlcpy(workgroup, *pp_workgroup, sizeof(workgroup));
 107         strlcpy(username, *pp_username, sizeof(username));
 108         strlcpy(password, *pp_password, sizeof(password));
 109
 110         /* See if there's an authentication with context function provided */
 111         auth_with_context_fn = smbc_getFunctionAuthDataWithContext(context);
 112         if (auth_with_context_fn)
 113         {
 114             (* auth_with_context_fn)(context,
 115                                      server, share,
 116                                      workgroup, sizeof(workgroup),
 117                                      username, sizeof(username),
 118                                      password, sizeof(password));
 119         }
 120         else
 121         {
 122             smbc_getFunctionAuthData(context)(server, share,
 123                                               workgroup, sizeof(workgroup),
 124                                               username, sizeof(username),
 125                                               password, sizeof(password));
 126         }
 127
 128         TALLOC_FREE(*pp_workgroup);
 129         TALLOC_FREE(*pp_username);
 130         TALLOC_FREE(*pp_password);
 131
 132         *pp_workgroup = talloc_strdup(ctx, workgroup);
 133         *pp_username = talloc_strdup(ctx, username);
 134         *pp_password = talloc_strdup(ctx, password);
 135 }
 136
 137
 138 void
 139 SMBC_get_auth_data(const char *server, const char *share,
 140                    char *workgroup_buf, int workgroup_buf_len,
 141                    char *username_buf, int username_buf_len,
 142                    char *password_buf, int password_buf_len)
 143 {
 144         /* Default function just uses provided data.  Nothing to do. */
 145 }
 146
 147
 148
 149 SMBCSRV *
 150 SMBC_find_server(TALLOC_CTX *ctx,
 151                  SMBCCTX *context,
 152                  const char *server,
 153                  const char *share,
 154                  char **pp_workgroup,
 155                  char **pp_username,
 156                  char **pp_password)
 157 {
 158         SMBCSRV *srv;
 159         int auth_called = 0;
 160
 161         if (!pp_workgroup || !pp_username || !pp_password) {
 162                 return NULL;
 163         }
 164
 165 check_server_cache:
 166
 167         srv = smbc_getFunctionGetCachedServer(context)(context,
 168                                                        server, share,
 169                                                        *pp_workgroup,
 170                                                        *pp_username);
 171
 172         if (!auth_called && !srv && (!*pp_username || !(*pp_username)[0] ||
 173                                      !*pp_password || !(*pp_password)[0])) {
 174                 SMBC_call_auth_fn(ctx, context, server, share,
 175                                   pp_workgroup, pp_username, pp_password);
 176
 177                 /*
 178                  * However, smbc_auth_fn may have picked up info relating to
 179                  * an existing connection, so try for an existing connection
 180                  * again ...
 181                  */
 182                 auth_called = 1;
 183                 goto check_server_cache;
 184
 185         }
 186
 187         if (srv) {
 188                 if (smbc_getFunctionCheckServer(context)(context, srv)) {
 189                         /*
 190                          * This server is no good anymore
 191                          * Try to remove it and check for more possible
 192                          * servers in the cache
 193                          */
 194                         if (smbc_getFunctionRemoveUnusedServer(context)(context,
 195                                                                         srv)) {
 196                                 /*
 197                                  * We could not remove the server completely,
 198                                  * remove it from the cache so we will not get
 199                                  * it again. It will be removed when the last
 200                                  * file/dir is closed.
 201                                  */
 202                                 smbc_getFunctionRemoveCachedServer(context)(context,
 203                                                                             srv);
 204                         }
 205
 206                         /*
 207                          * Maybe there are more cached connections to this
 208                          * server
 209                          */
 210                         goto check_server_cache;
 211                 }
 212
 213                 return srv;
 214         }
 215
 216         return NULL;
 217 }
 218
 219 /*
 220  * Connect to a server, possibly on an existing connection
 221  *
 222  * Here, what we want to do is: If the server and username
 223  * match an existing connection, reuse that, otherwise, establish a
 224  * new connection.
 225  *
 226  * If we have to create a new connection, call the auth_fn to get the
 227  * info we need, unless the username and password were passed in.
 228  */
 229
 230 SMBCSRV *
 231 SMBC_server(TALLOC_CTX *ctx,
 232             SMBCCTX *context,
 233             bool connect_if_not_found,
 234             const char *server,
 235             const char *share,
 236             char **pp_workgroup,
 237             char **pp_username,
 238             char **pp_password)
 239 {
 240         SMBCSRV *srv=NULL;
 241         char *workgroup = NULL;
 242         struct cli_state *c;
 243         struct nmb_name called, calling;
 244         const char *server_n = server;
 245         struct sockaddr_storage ss;
 246         int tried_reverse = 0;
 247         int port_try_first;
 248         int port_try_next;
 249         int is_ipc = (share != NULL && strcmp(share, "IPC$") == 0);
 250         uint32 fs_attrs = 0;
 251         const char *username_used;
 252         NTSTATUS status;
 253
 254         zero_sockaddr(&ss);
 255         ZERO_STRUCT(c);
 256
 257         if (server[0] == 0) {
 258                 errno = EPERM;
 259                 return NULL;
 260         }
 261
 262         /* Look for a cached connection */
 263         srv = SMBC_find_server(ctx, context, server, share,
 264                                pp_workgroup, pp_username, pp_password);
 265
 266         /*
 267          * If we found a connection and we're only allowed one share per
 268          * server...
 269          */
 270         if (srv &&
 271             *share != '\0' &&
 272             smbc_getOptionOneSharePerServer(context)) {
 273
 274                 /*
 275                  * ... then if there's no current connection to the share,
 276                  * connect to it.  SMBC_find_server(), or rather the function
 277                  * pointed to by context->get_cached_srv_fn which
 278                  * was called by SMBC_find_server(), will have issued a tree
 279                  * disconnect if the requested share is not the same as the
 280                  * one that was already connected.
 281                  */
 282                 if (srv->cli->cnum == (uint16) -1) {
 283                         /* Ensure we have accurate auth info */
 284                         SMBC_call_auth_fn(ctx, context, server, share,
 285                                           pp_workgroup,
 286                                           pp_username,
 287                                           pp_password);
 288
 289                         if (!*pp_workgroup || !*pp_username || !*pp_password) {
 290                                 errno = ENOMEM;
 291                                 cli_shutdown(srv->cli);
 292                                 srv->cli = NULL;
 293                                 smbc_getFunctionRemoveCachedServer(context)(context,
 294                                                                             srv);
 295                                 return NULL;
 296                         }
 297
 298                         /*
 299                          * We don't need to renegotiate encryption
 300                          * here as the encryption context is not per
 301                          * tid.
 302                          */
 303
 304                         status = cli_tcon_andx(srv->cli, share, "?????",
 305                                                *pp_password,
 306                                                strlen(*pp_password)+1);
 307                         if (!NT_STATUS_IS_OK(status)) {
 308                                 errno = map_errno_from_nt_status(status);
 309                                 cli_shutdown(srv->cli);
 310                                 srv->cli = NULL;
 311                                 smbc_getFunctionRemoveCachedServer(context)(context,
 312                                                                             srv);
 313                                 srv = NULL;
 314                         }
 315
 316                         /* Determine if this share supports case sensitivity */
 317                         if (is_ipc) {
 318                                 DEBUG(4,
 319                                       ("IPC$ so ignore case sensitivity\n"));
 320                         } else if (!cli_get_fs_attr_info(c, &fs_attrs)) {
 321                                 DEBUG(4, ("Could not retrieve "
 322                                           "case sensitivity flag: %s.\n",
 323                                           cli_errstr(c)));
 324
 325                                 /*
 326                                  * We can't determine the case sensitivity of
 327                                  * the share. We have no choice but to use the
 328                                  * user-specified case sensitivity setting.
 329                                  */
 330                                 if (smbc_getOptionCaseSensitive(context)) {
 331                                         cli_set_case_sensitive(c, True);
 332                                 } else {
 333                                         cli_set_case_sensitive(c, False);
 334                                 }
 335                         } else {
 336                                 DEBUG(4,
 337                                       ("Case sensitive: %s\n",
 338                                        (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
 339                                         ? "True"
 340                                         : "False")));
 341                                 cli_set_case_sensitive(
 342                                         c,
 343                                         (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
 344                                          ? True
 345                                          : False));
 346                         }
 347
 348                         /*
 349                          * Regenerate the dev value since it's based on both
 350                          * server and share
 351                          */
 352                         if (srv) {
 353                                 srv->dev = (dev_t)(str_checksum(server) ^
 354                                                    str_checksum(share));
 355                         }
 356                 }
 357         }
 358
 359         /* If we have a connection... */
 360         if (srv) {
 361
 362                 /* ... then we're done here.  Give 'em what they came for. */
 363                 goto done;
 364         }
 365
 366         /* If we're not asked to connect when a connection doesn't exist... */
 367         if (! connect_if_not_found) {
 368                 /* ... then we're done here. */
 369                 return NULL;
 370         }
 371
 372         if (!*pp_workgroup || !*pp_username || !*pp_password) {
 373                 errno = ENOMEM;
 374                 return NULL;
 375         }
 376
 377         make_nmb_name(&calling, smbc_getNetbiosName(context), 0x0);
 378         make_nmb_name(&called , server, 0x20);
 379
 380         DEBUG(4,("SMBC_server: server_n=[%s] server=[%s]\n", server_n, server));
 381
 382         DEBUG(4,(" -> server_n=[%s] server=[%s]\n", server_n, server));
 383
 384 again:
 385
 386         zero_sockaddr(&ss);
 387
 388         /* have to open a new connection */
 389         if ((c = cli_initialise()) == NULL) {
 390                 errno = ENOMEM;
 391                 return NULL;
 392         }
 393
 394         if (smbc_getOptionUseKerberos(context)) {
 395                 c->use_kerberos = True;
 396         }
 397
 398         if (smbc_getOptionFallbackAfterKerberos(context)) {
 399                 c->fallback_after_kerberos = True;
 400         }
 401
 402         c->timeout = smbc_getTimeout(context);
 403
 404         /*
 405          * Force use of port 139 for first try if share is $IPC, empty, or
 406          * null, so browse lists can work
 407          */
 408         if (share == NULL || *share == '\0' || is_ipc) {
 409                 port_try_first = 139;
 410                 port_try_next = 445;
 411         } else {
 412                 port_try_first = 445;
 413                 port_try_next = 139;
 414         }
 415
 416         c->port = port_try_first;
 417
 418         status = cli_connect(c, server_n, &ss);
 419         if (!NT_STATUS_IS_OK(status)) {
 420
 421                 /* First connection attempt failed.  Try alternate port. */
 422                 c->port = port_try_next;
 423
 424                 status = cli_connect(c, server_n, &ss);
 425                 if (!NT_STATUS_IS_OK(status)) {
 426                         cli_shutdown(c);
 427                         errno = ETIMEDOUT;
 428                         return NULL;
 429                 }
 430         }
 431
 432         if (!cli_session_request(c, &calling, &called)) {
 433                 cli_shutdown(c);
 434                 if (strcmp(called.name, "*SMBSERVER")) {
 435                         make_nmb_name(&called , "*SMBSERVER", 0x20);
 436                         goto again;
 437                 } else {  /* Try one more time, but ensure we don't loop */
 438
 439                         /* Only try this if server is an IP address ... */
 440
 441                         if (is_ipaddress(server) && !tried_reverse) {
 442                                 fstring remote_name;
 443                                 struct sockaddr_storage rem_ss;
 444
 445                                 if (!interpret_string_addr(&rem_ss, server,
 446                                                            NI_NUMERICHOST)) {
 447                                         DEBUG(4, ("Could not convert IP address "
 448                                                   "%s to struct sockaddr_storage\n",
 449                                                   server));
 450                                         errno = ETIMEDOUT;
 451                                         return NULL;
 452                                 }
 453
 454                                 tried_reverse++; /* Yuck */
 455
 456                                 if (name_status_find("*", 0, 0,
 457                                                      &rem_ss, remote_name)) {
 458                                         make_nmb_name(&called,
 459                                                       remote_name,
 460                                                       0x20);
 461                                         goto again;
 462                                 }
 463                         }
 464                 }
 465                 errno = ETIMEDOUT;
 466                 return NULL;
 467         }
 468
 469         DEBUG(4,(" session request ok\n"));
 470
 471         status = cli_negprot(c);
 472
 473         if (!NT_STATUS_IS_OK(status)) {
 474                 cli_shutdown(c);
 475                 errno = ETIMEDOUT;
 476                 return NULL;
 477         }
 478
 479         username_used = *pp_username;
 480
 481         if (!NT_STATUS_IS_OK(cli_session_setup(c, username_used,
 482                                                *pp_password,
 483                                                strlen(*pp_password),
 484                                                *pp_password,
 485                                                strlen(*pp_password),
 486                                                *pp_workgroup))) {
 487
 488                 /* Failed.  Try an anonymous login, if allowed by flags. */
 489                 username_used = "";
 490
 491                 if (smbc_getOptionNoAutoAnonymousLogin(context) ||
 492                     !NT_STATUS_IS_OK(cli_session_setup(c, username_used,
 493                                                        *pp_password, 1,
 494                                                        *pp_password, 0,
 495                                                        *pp_workgroup))) {
 496
 497                         cli_shutdown(c);
 498                         errno = EPERM;
 499                         return NULL;
 500                 }
 501         }
 502
 503         DEBUG(4,(" session setup ok\n"));
 504
 505         status = cli_tcon_andx(c, share, "?????", *pp_password,
 506                                strlen(*pp_password)+1);
 507         if (!NT_STATUS_IS_OK(status)) {
 508                 errno = map_errno_from_nt_status(status);
 509                 cli_shutdown(c);
 510                 return NULL;
 511         }
 512
 513         DEBUG(4,(" tconx ok\n"));
 514
 515         /* Determine if this share supports case sensitivity */
 516         if (is_ipc) {
 517                 DEBUG(4, ("IPC$ so ignore case sensitivity\n"));
 518         } else if (!cli_get_fs_attr_info(c, &fs_attrs)) {
 519                 DEBUG(4, ("Could not retrieve case sensitivity flag: %s.\n",
 520                           cli_errstr(c)));
 521
 522                 /*
 523                  * We can't determine the case sensitivity of the share. We
 524                  * have no choice but to use the user-specified case
 525                  * sensitivity setting.
 526                  */
 527                 if (smbc_getOptionCaseSensitive(context)) {
 528                         cli_set_case_sensitive(c, True);
 529                 } else {
 530                         cli_set_case_sensitive(c, False);
 531                 }
 532         } else {
 533                 DEBUG(4, ("Case sensitive: %s\n",
 534                           (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
 535                            ? "True"
 536                            : "False")));
 537                 cli_set_case_sensitive(c,
 538                                        (fs_attrs & FILE_CASE_SENSITIVE_SEARCH
 539                                         ? True
 540                                         : False));
 541         }
 542
 543         if (context->internal->smb_encryption_level) {
 544                 /* Attempt UNIX smb encryption. */
 545                 if (!NT_STATUS_IS_OK(cli_force_encryption(c,
 546                                                           username_used,
 547                                                           *pp_password,
 548                                                           *pp_workgroup))) {
 549
 550                         /*
 551                          * context->smb_encryption_level == 1
 552                          * means don't fail if encryption can't be negotiated,
 553                          * == 2 means fail if encryption can't be negotiated.
 554                          */
 555
 556                         DEBUG(4,(" SMB encrypt failed\n"));
 557
 558                         if (context->internal->smb_encryption_level == 2) {
 559                                 cli_shutdown(c);
 560                                 errno = EPERM;
 561                                 return NULL;
 562                         }
 563                 }
 564                 DEBUG(4,(" SMB encrypt ok\n"));
 565         }
 566
 567         /*
 568          * Ok, we have got a nice connection
 569          * Let's allocate a server structure.
 570          */
 571
 572         srv = SMB_MALLOC_P(SMBCSRV);
 573         if (!srv) {
 574                 errno = ENOMEM;
 575                 goto failed;
 576         }
 577
 578         ZERO_STRUCTP(srv);
 579         srv->cli = c;
 580         srv->dev = (dev_t)(str_checksum(server) ^ str_checksum(share));
 581         srv->no_pathinfo = False;
 582         srv->no_pathinfo2 = False;
 583         srv->no_nt_session = False;
 584
 585         /* now add it to the cache (internal or external)  */
 586         /* Let the cache function set errno if it wants to */
 587         errno = 0;
 588         if (smbc_getFunctionAddCachedServer(context)(context, srv,
 589                                                      server, share,
 590                                                      *pp_workgroup,
 591                                                      *pp_username)) {
 592                 int saved_errno = errno;
 593                 DEBUG(3, (" Failed to add server to cache\n"));
 594                 errno = saved_errno;
 595                 if (errno == 0) {
 596                         errno = ENOMEM;
 597                 }
 598                 goto failed;
 599         }
 600
 601         DEBUG(2, ("Server connect ok: //%s/%s: %p\n",
 602                   server, share, srv));
 603
 604         DLIST_ADD(context->internal->servers, srv);
 605 done:
 606         if (!pp_workgroup || !*pp_workgroup || !**pp_workgroup) {
 607                 workgroup = talloc_strdup(ctx, smbc_getWorkgroup(context));
 608         } else {
 609                 workgroup = *pp_workgroup;
 610         }
 611         if(!workgroup) {
 612                 return NULL;
 613         }
 614
 615         /* set the credentials to make DFS work */
 616         smbc_set_credentials_with_fallback(context,
 617                                            workgroup,
 618                                            *pp_username,
 619                                            *pp_password);
 620
 621         return srv;
 622
 623 failed:
 624         cli_shutdown(c);
 625         if (!srv) {
 626                 return NULL;
 627         }
 628
 629         SAFE_FREE(srv);
 630         return NULL;
 631 }
 632
 633 /*
 634  * Connect to a server for getting/setting attributes, possibly on an existing
 635  * connection.  This works similarly to SMBC_server().
 636  */
 637 SMBCSRV *
 638 SMBC_attr_server(TALLOC_CTX *ctx,
 639                  SMBCCTX *context,
 640                  const char *server,
 641                  const char *share,
 642                  char **pp_workgroup,
 643                  char **pp_username,
 644                  char **pp_password)
 645 {
 646         int flags;
 647         struct sockaddr_storage ss;
 648         struct cli_state *ipc_cli;
 649         struct rpc_pipe_client *pipe_hnd;
 650         NTSTATUS nt_status;
 651         SMBCSRV *ipc_srv=NULL;
 652
 653         /*
 654          * See if we've already created this special connection.  Reference
 655          * our "special" share name '*IPC$', which is an impossible real share
 656          * name due to the leading asterisk.
 657          */
 658         ipc_srv = SMBC_find_server(ctx, context, server, "*IPC$",
 659                                    pp_workgroup, pp_username, pp_password);
 660         if (!ipc_srv) {
 661
 662                 /* We didn't find a cached connection.  Get the password */
 663                 if (!*pp_password || (*pp_password)[0] == '\0') {
 664                         /* ... then retrieve it now. */
 665                         SMBC_call_auth_fn(ctx, context, server, share,
 666                                           pp_workgroup,
 667                                           pp_username,
 668                                           pp_password);
 669                         if (!*pp_workgroup || !*pp_username || !*pp_password) {
 670                                 errno = ENOMEM;
 671                                 return NULL;
 672                         }
 673                 }
 674
 675                 flags = 0;
 676                 if (smbc_getOptionUseKerberos(context)) {
 677                         flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
 678                 }
 679
 680                 zero_sockaddr(&ss);
 681                 nt_status = cli_full_connection(&ipc_cli,
 682                                                 global_myname(), server,
 683                                                 &ss, 0, "IPC$", "?????",
 684                                                 *pp_username,
 685                                                 *pp_workgroup,
 686                                                 *pp_password,
 687                                                 flags,
 688                                                 Undefined, NULL);
 689                 if (! NT_STATUS_IS_OK(nt_status)) {
 690                         DEBUG(1,("cli_full_connection failed! (%s)\n",
 691                                  nt_errstr(nt_status)));
 692                         errno = ENOTSUP;
 693                         return NULL;
 694                 }
 695
 696                 if (context->internal->smb_encryption_level) {
 697                         /* Attempt UNIX smb encryption. */
 698                         if (!NT_STATUS_IS_OK(cli_force_encryption(ipc_cli,
 699                                                                   *pp_username,
 700                                                                   *pp_password,
 701                                                                   *pp_workgroup))) {
 702
 703                                 /*
 704                                  * context->smb_encryption_level ==
 705                                  * 1 means don't fail if encryption can't be
 706                                  * negotiated, == 2 means fail if encryption
 707                                  * can't be negotiated.
 708                                  */
 709
 710                                 DEBUG(4,(" SMB encrypt failed on IPC$\n"));
 711
 712                                 if (context->internal->smb_encryption_level == 2) {
 713                                         cli_shutdown(ipc_cli);
 714                                         errno = EPERM;
 715                                         return NULL;
 716                                 }
 717                         }
 718                         DEBUG(4,(" SMB encrypt ok on IPC$\n"));
 719                 }
 720
 721                 ipc_srv = SMB_MALLOC_P(SMBCSRV);
 722                 if (!ipc_srv) {
 723                         errno = ENOMEM;
 724                         cli_shutdown(ipc_cli);
 725                         return NULL;
 726                 }
 727
 728                 ZERO_STRUCTP(ipc_srv);
 729                 ipc_srv->cli = ipc_cli;
 730
 731                 nt_status = cli_rpc_pipe_open_noauth(
 732                         ipc_srv->cli, &ndr_table_lsarpc.syntax_id, &pipe_hnd);
 733                 if (!NT_STATUS_IS_OK(nt_status)) {
 734                         DEBUG(1, ("cli_nt_session_open fail!\n"));
 735                         errno = ENOTSUP;
 736                         cli_shutdown(ipc_srv->cli);
 737                         free(ipc_srv);
 738                         return NULL;
 739                 }
 740
 741                 /*
 742                  * Some systems don't support
 743                  * SEC_FLAG_MAXIMUM_ALLOWED, but NT sends 0x2000000
 744                  * so we might as well do it too.
 745                  */
 746
 747                 nt_status = rpccli_lsa_open_policy(
 748                         pipe_hnd,
 749                         talloc_tos(),
 750                         True,
 751                         GENERIC_EXECUTE_ACCESS,
 752                         &ipc_srv->pol);
 753
 754                 if (!NT_STATUS_IS_OK(nt_status)) {
 755                         errno = SMBC_errno(context, ipc_srv->cli);
 756                         cli_shutdown(ipc_srv->cli);
 757                         return NULL;
 758                 }
 759
 760                 /* now add it to the cache (internal or external) */
 761
 762                 errno = 0;      /* let cache function set errno if it likes */
 763                 if (smbc_getFunctionAddCachedServer(context)(context, ipc_srv,
 764                                                              server,
 765                                                              "*IPC$",
 766                                                              *pp_workgroup,
 767                                                              *pp_username)) {
 768                         DEBUG(3, (" Failed to add server to cache\n"));
 769                         if (errno == 0) {
 770                                 errno = ENOMEM;
 771                         }
 772                         cli_shutdown(ipc_srv->cli);
 773                         free(ipc_srv);
 774                         return NULL;
 775                 }
 776
 777                 DLIST_ADD(context->internal->servers, ipc_srv);
 778         }
 779
 780         return ipc_srv;
 781 }