source3/winbindd/winbindd_cm.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon connection manager
   5
   6    Copyright (C) Tim Potter                2001
   7    Copyright (C) Andrew Bartlett           2002
   8    Copyright (C) Gerald (Jerry) Carter     2003-2005.
   9    Copyright (C) Volker Lendecke           2004-2005
  10    Copyright (C) Jeremy Allison            2006
  11
  12    This program is free software; you can redistribute it and/or modify
  13    it under the terms of the GNU General Public License as published by
  14    the Free Software Foundation; either version 3 of the License, or
  15    (at your option) any later version.
  16
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 /*
  27    We need to manage connections to domain controllers without having to
  28    mess up the main winbindd code with other issues.  The aim of the
  29    connection manager is to:
  30
  31        - make connections to domain controllers and cache them
  32        - re-establish connections when networks or servers go down
  33        - centralise the policy on connection timeouts, domain controller
  34          selection etc
  35        - manage re-entrancy for when winbindd becomes able to handle
  36          multiple outstanding rpc requests
  37
  38    Why not have connection management as part of the rpc layer like tng?
  39    Good question.  This code may morph into libsmb/rpc_cache.c or something
  40    like that but at the moment it's simply staying as part of winbind.  I
  41    think the TNG architecture of forcing every user of the rpc layer to use
  42    the connection caching system is a bad idea.  It should be an optional
  43    method of using the routines.
  44
  45    The TNG design is quite good but I disagree with some aspects of the
  46    implementation. -tpot
  47
  48  */
  49
  50 /*
  51    TODO:
  52
  53      - I'm pretty annoyed by all the make_nmb_name() stuff.  It should be
  54        moved down into another function.
  55
  56      - Take care when destroying cli_structs as they can be shared between
  57        various sam handles.
  58
  59  */
  60
  61 #include "includes.h"
  62 #include "winbindd.h"
  63
  64 #undef DBGC_CLASS
  65 #define DBGC_CLASS DBGC_WINBIND
  66
  67 struct dc_name_ip {
  68         fstring name;
  69         struct sockaddr_storage ss;
  70 };
  71
  72 extern struct winbindd_methods reconnect_methods;
  73 extern bool override_logfile;
  74
  75 static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain);
  76 static void set_dc_type_and_flags( struct winbindd_domain *domain );
  77 static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
  78                     struct dc_name_ip **dcs, int *num_dcs);
  79
  80 /****************************************************************
  81  Child failed to find DC's. Reschedule check.
  82 ****************************************************************/
  83
  84 static void msg_failed_to_go_online(struct messaging_context *msg,
  85                                     void *private_data,
  86                                     uint32_t msg_type,
  87                                     struct server_id server_id,
  88                                     DATA_BLOB *data)
  89 {
  90         struct winbindd_domain *domain;
  91         const char *domainname = (const char *)data->data;
  92
  93         if (data->data == NULL || data->length == 0) {
  94                 return;
  95         }
  96
  97         DEBUG(5,("msg_fail_to_go_online: received for domain %s.\n", domainname));
  98
  99         for (domain = domain_list(); domain; domain = domain->next) {
 100                 if (domain->internal) {
 101                         continue;
 102                 }
 103
 104                 if (strequal(domain->name, domainname)) {
 105                         if (domain->online) {
 106                                 /* We're already online, ignore. */
 107                                 DEBUG(5,("msg_fail_to_go_online: domain %s "
 108                                         "already online.\n", domainname));
 109                                 continue;
 110                         }
 111
 112                         /* Reschedule the online check. */
 113                         set_domain_offline(domain);
 114                         break;
 115                 }
 116         }
 117 }
 118
 119 /****************************************************************
 120  Actually cause a reconnect from a message.
 121 ****************************************************************/
 122
 123 static void msg_try_to_go_online(struct messaging_context *msg,
 124                                  void *private_data,
 125                                  uint32_t msg_type,
 126                                  struct server_id server_id,
 127                                  DATA_BLOB *data)
 128 {
 129         struct winbindd_domain *domain;
 130         const char *domainname = (const char *)data->data;
 131
 132         if (data->data == NULL || data->length == 0) {
 133                 return;
 134         }
 135
 136         DEBUG(5,("msg_try_to_go_online: received for domain %s.\n", domainname));
 137
 138         for (domain = domain_list(); domain; domain = domain->next) {
 139                 if (domain->internal) {
 140                         continue;
 141                 }
 142
 143                 if (strequal(domain->name, domainname)) {
 144
 145                         if (domain->online) {
 146                                 /* We're already online, ignore. */
 147                                 DEBUG(5,("msg_try_to_go_online: domain %s "
 148                                         "already online.\n", domainname));
 149                                 continue;
 150                         }
 151
 152                         /* This call takes care of setting the online
 153                            flag to true if we connected, or re-adding
 154                            the offline handler if false. Bypasses online
 155                            check so always does network calls. */
 156
 157                         init_dc_connection_network(domain);
 158                         break;
 159                 }
 160         }
 161 }
 162
 163 /****************************************************************
 164  Fork a child to try and contact a DC. Do this as contacting a
 165  DC requires blocking lookups and we don't want to block our
 166  parent.
 167 ****************************************************************/
 168
 169 static bool fork_child_dc_connect(struct winbindd_domain *domain)
 170 {
 171         struct dc_name_ip *dcs = NULL;
 172         int num_dcs = 0;
 173         TALLOC_CTX *mem_ctx = NULL;
 174         pid_t child_pid;
 175         pid_t parent_pid = sys_getpid();
 176
 177         /* Stop zombies */
 178         CatchChild();
 179
 180         child_pid = sys_fork();
 181
 182         if (child_pid == -1) {
 183                 DEBUG(0, ("fork_child_dc_connect: Could not fork: %s\n", strerror(errno)));
 184                 return False;
 185         }
 186
 187         if (child_pid != 0) {
 188                 /* Parent */
 189                 messaging_register(winbind_messaging_context(), NULL,
 190                                    MSG_WINBIND_TRY_TO_GO_ONLINE,
 191                                    msg_try_to_go_online);
 192                 messaging_register(winbind_messaging_context(), NULL,
 193                                    MSG_WINBIND_FAILED_TO_GO_ONLINE,
 194                                    msg_failed_to_go_online);
 195                 return True;
 196         }
 197
 198         /* Child. */
 199
 200         /* Leave messages blocked - we will never process one. */
 201
 202         if (!reinit_after_fork(winbind_messaging_context())) {
 203                 DEBUG(0,("reinit_after_fork() failed\n"));
 204                 _exit(0);
 205         }
 206
 207         close_conns_after_fork();
 208
 209         if (!override_logfile) {
 210                 char *logfile;
 211                 if (asprintf(&logfile, "%s/log.winbindd-dc-connect", get_dyn_LOGFILEBASE()) > 0) {
 212                         lp_set_logfile(logfile);
 213                         SAFE_FREE(logfile);
 214                         reopen_logs();
 215                 }
 216         }
 217
 218         mem_ctx = talloc_init("fork_child_dc_connect");
 219         if (!mem_ctx) {
 220                 DEBUG(0,("talloc_init failed.\n"));
 221                 _exit(0);
 222         }
 223
 224         if ((!get_dcs(mem_ctx, domain, &dcs, &num_dcs)) || (num_dcs == 0)) {
 225                 /* Still offline ? Can't find DC's. */
 226                 messaging_send_buf(winbind_messaging_context(),
 227                                    pid_to_procid(parent_pid),
 228                                    MSG_WINBIND_FAILED_TO_GO_ONLINE,
 229                                    (uint8 *)domain->name,
 230                                    strlen(domain->name)+1);
 231                 _exit(0);
 232         }
 233
 234         /* We got a DC. Send a message to our parent to get it to
 235            try and do the same. */
 236
 237         messaging_send_buf(winbind_messaging_context(),
 238                            pid_to_procid(parent_pid),
 239                            MSG_WINBIND_TRY_TO_GO_ONLINE,
 240                            (uint8 *)domain->name,
 241                            strlen(domain->name)+1);
 242         _exit(0);
 243 }
 244
 245 /****************************************************************
 246  Handler triggered if we're offline to try and detect a DC.
 247 ****************************************************************/
 248
 249 static void check_domain_online_handler(struct event_context *ctx,
 250                                         struct timed_event *te,
 251                                         const struct timeval *now,
 252                                         void *private_data)
 253 {
 254         struct winbindd_domain *domain =
 255                 (struct winbindd_domain *)private_data;
 256
 257         DEBUG(10,("check_domain_online_handler: called for domain "
 258                   "%s (online = %s)\n", domain->name,
 259                   domain->online ? "True" : "False" ));
 260
 261         TALLOC_FREE(domain->check_online_event);
 262
 263         /* Are we still in "startup" mode ? */
 264
 265         if (domain->startup && (now->tv_sec > domain->startup_time + 30)) {
 266                 /* No longer in "startup" mode. */
 267                 DEBUG(10,("check_domain_online_handler: domain %s no longer in 'startup' mode.\n",
 268                         domain->name ));
 269                 domain->startup = False;
 270         }
 271
 272         /* We've been told to stay offline, so stay
 273            that way. */
 274
 275         if (get_global_winbindd_state_offline()) {
 276                 DEBUG(10,("check_domain_online_handler: domain %s remaining globally offline\n",
 277                         domain->name ));
 278                 return;
 279         }
 280
 281         /* Fork a child to test if it can contact a DC.
 282            If it can then send ourselves a message to
 283            cause a reconnect. */
 284
 285         fork_child_dc_connect(domain);
 286 }
 287
 288 /****************************************************************
 289  If we're still offline setup the timeout check.
 290 ****************************************************************/
 291
 292 static void calc_new_online_timeout_check(struct winbindd_domain *domain)
 293 {
 294         int wbc = lp_winbind_cache_time();
 295
 296         if (domain->startup) {
 297                 domain->check_online_timeout = 10;
 298         } else if (domain->check_online_timeout < wbc) {
 299                 domain->check_online_timeout = wbc;
 300         }
 301 }
 302
 303 /****************************************************************
 304  Set domain offline and also add handler to put us back online
 305  if we detect a DC.
 306 ****************************************************************/
 307
 308 void set_domain_offline(struct winbindd_domain *domain)
 309 {
 310         DEBUG(10,("set_domain_offline: called for domain %s\n",
 311                 domain->name ));
 312
 313         TALLOC_FREE(domain->check_online_event);
 314
 315         if (domain->internal) {
 316                 DEBUG(3,("set_domain_offline: domain %s is internal - logic error.\n",
 317                         domain->name ));
 318                 return;
 319         }
 320
 321         domain->online = False;
 322
 323         /* Offline domains are always initialized. They're
 324            re-initialized when they go back online. */
 325
 326         domain->initialized = True;
 327
 328         /* We only add the timeout handler that checks and
 329            allows us to go back online when we've not
 330            been told to remain offline. */
 331
 332         if (get_global_winbindd_state_offline()) {
 333                 DEBUG(10,("set_domain_offline: domain %s remaining globally offline\n",
 334                         domain->name ));
 335                 return;
 336         }
 337
 338         /* If we're in statup mode, check again in 10 seconds, not in
 339            lp_winbind_cache_time() seconds (which is 5 mins by default). */
 340
 341         calc_new_online_timeout_check(domain);
 342
 343         domain->check_online_event = event_add_timed(winbind_event_context(),
 344                                                 NULL,
 345                                                 timeval_current_ofs(domain->check_online_timeout,0),
 346                                                 "check_domain_online_handler",
 347                                                 check_domain_online_handler,
 348                                                 domain);
 349
 350         /* The above *has* to succeed for winbindd to work. */
 351         if (!domain->check_online_event) {
 352                 smb_panic("set_domain_offline: failed to add online handler");
 353         }
 354
 355         DEBUG(10,("set_domain_offline: added event handler for domain %s\n",
 356                 domain->name ));
 357
 358         /* Send an offline message to the idmap child when our
 359            primary domain goes offline */
 360
 361         if ( domain->primary ) {
 362                 struct winbindd_child *idmap = idmap_child();
 363
 364                 if ( idmap->pid != 0 ) {
 365                         messaging_send_buf(winbind_messaging_context(),
 366                                            pid_to_procid(idmap->pid),
 367                                            MSG_WINBIND_OFFLINE,
 368                                            (uint8 *)domain->name,
 369                                            strlen(domain->name)+1);
 370                 }
 371         }
 372
 373         return;
 374 }
 375
 376 /****************************************************************
 377  Set domain online - if allowed.
 378 ****************************************************************/
 379
 380 static void set_domain_online(struct winbindd_domain *domain)
 381 {
 382         struct timeval now;
 383
 384         DEBUG(10,("set_domain_online: called for domain %s\n",
 385                 domain->name ));
 386
 387         if (domain->internal) {
 388                 DEBUG(3,("set_domain_online: domain %s is internal - logic error.\n",
 389                         domain->name ));
 390                 return;
 391         }
 392
 393         if (get_global_winbindd_state_offline()) {
 394                 DEBUG(10,("set_domain_online: domain %s remaining globally offline\n",
 395                         domain->name ));
 396                 return;
 397         }
 398
 399         winbindd_set_locator_kdc_envs(domain);
 400
 401         /* If we are waiting to get a krb5 ticket, trigger immediately. */
 402         GetTimeOfDay(&now);
 403         set_event_dispatch_time(winbind_event_context(),
 404                                 "krb5_ticket_gain_handler", now);
 405
 406         /* Ok, we're out of any startup mode now... */
 407         domain->startup = False;
 408
 409         if (domain->online == False) {
 410                 /* We were offline - now we're online. We default to
 411                    using the MS-RPC backend if we started offline,
 412                    and if we're going online for the first time we
 413                    should really re-initialize the backends and the
 414                    checks to see if we're talking to an AD or NT domain.
 415                 */
 416
 417                 domain->initialized = False;
 418
 419                 /* 'reconnect_methods' is the MS-RPC backend. */
 420                 if (domain->backend == &reconnect_methods) {
 421                         domain->backend = NULL;
 422                 }
 423         }
 424
 425         /* Ensure we have no online timeout checks. */
 426         domain->check_online_timeout = 0;
 427         TALLOC_FREE(domain->check_online_event);
 428
 429         /* Ensure we ignore any pending child messages. */
 430         messaging_deregister(winbind_messaging_context(),
 431                              MSG_WINBIND_TRY_TO_GO_ONLINE, NULL);
 432         messaging_deregister(winbind_messaging_context(),
 433                              MSG_WINBIND_FAILED_TO_GO_ONLINE, NULL);
 434
 435         domain->online = True;
 436
 437         /* Send an online message to the idmap child when our
 438            primary domain comes online */
 439
 440         if ( domain->primary ) {
 441                 struct winbindd_child *idmap = idmap_child();
 442
 443                 if ( idmap->pid != 0 ) {
 444                         messaging_send_buf(winbind_messaging_context(),
 445                                            pid_to_procid(idmap->pid),
 446                                            MSG_WINBIND_ONLINE,
 447                                            (uint8 *)domain->name,
 448                                            strlen(domain->name)+1);
 449                 }
 450         }
 451
 452         return;
 453 }
 454
 455 /****************************************************************
 456  Requested to set a domain online.
 457 ****************************************************************/
 458
 459 void set_domain_online_request(struct winbindd_domain *domain)
 460 {
 461         struct timeval tev;
 462
 463         DEBUG(10,("set_domain_online_request: called for domain %s\n",
 464                 domain->name ));
 465
 466         if (get_global_winbindd_state_offline()) {
 467                 DEBUG(10,("set_domain_online_request: domain %s remaining globally offline\n",
 468                         domain->name ));
 469                 return;
 470         }
 471
 472         /* We've been told it's safe to go online and
 473            try and connect to a DC. But I don't believe it
 474            because network manager seems to lie.
 475            Wait at least 5 seconds. Heuristics suck... */
 476
 477         if (!domain->check_online_event) {
 478                 /* If we've come from being globally offline we
 479                    don't have a check online event handler set.
 480                    We need to add one now we're trying to go
 481                    back online. */
 482
 483                 DEBUG(10,("set_domain_online_request: domain %s was globally offline.\n",
 484                         domain->name ));
 485
 486                 domain->check_online_event = event_add_timed(winbind_event_context(),
 487                                                                 NULL,
 488                                                                 timeval_current_ofs(5, 0),
 489                                                                 "check_domain_online_handler",
 490                                                                 check_domain_online_handler,
 491                                                                 domain);
 492
 493                 /* The above *has* to succeed for winbindd to work. */
 494                 if (!domain->check_online_event) {
 495                         smb_panic("set_domain_online_request: failed to add online handler");
 496                 }
 497         }
 498
 499         GetTimeOfDay(&tev);
 500
 501         /* Go into "startup" mode again. */
 502         domain->startup_time = tev.tv_sec;
 503         domain->startup = True;
 504
 505         tev.tv_sec += 5;
 506
 507         set_event_dispatch_time(winbind_event_context(), "check_domain_online_handler", tev);
 508 }
 509
 510 /****************************************************************
 511  Add -ve connection cache entries for domain and realm.
 512 ****************************************************************/
 513
 514 void winbind_add_failed_connection_entry(const struct winbindd_domain *domain,
 515                                         const char *server,
 516                                         NTSTATUS result)
 517 {
 518         add_failed_connection_entry(domain->name, server, result);
 519         /* If this was the saf name for the last thing we talked to,
 520            remove it. */
 521         saf_delete(domain->name);
 522         if (*domain->alt_name) {
 523                 add_failed_connection_entry(domain->alt_name, server, result);
 524                 saf_delete(domain->alt_name);
 525         }
 526         winbindd_unset_locator_kdc_env(domain);
 527 }
 528
 529 /* Choose between anonymous or authenticated connections.  We need to use
 530    an authenticated connection if DCs have the RestrictAnonymous registry
 531    entry set > 0, or the "Additional restrictions for anonymous
 532    connections" set in the win2k Local Security Policy.
 533
 534    Caller to free() result in domain, username, password
 535 */
 536
 537 static void cm_get_ipc_userpass(char **username, char **domain, char **password)
 538 {
 539         *username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
 540         *domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
 541         *password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
 542
 543         if (*username && **username) {
 544
 545                 if (!*domain || !**domain)
 546                         *domain = smb_xstrdup(lp_workgroup());
 547
 548                 if (!*password || !**password)
 549                         *password = smb_xstrdup("");
 550
 551                 DEBUG(3, ("cm_get_ipc_userpass: Retrieved auth-user from secrets.tdb [%s\\%s]\n",
 552                           *domain, *username));
 553
 554         } else {
 555                 DEBUG(3, ("cm_get_ipc_userpass: No auth-user defined\n"));
 556                 *username = smb_xstrdup("");
 557                 *domain = smb_xstrdup("");
 558                 *password = smb_xstrdup("");
 559         }
 560 }
 561
 562 static bool get_dc_name_via_netlogon(struct winbindd_domain *domain,
 563                                      fstring dcname,
 564                                      struct sockaddr_storage *dc_ss)
 565 {
 566         struct winbindd_domain *our_domain = NULL;
 567         struct rpc_pipe_client *netlogon_pipe = NULL;
 568         NTSTATUS result;
 569         WERROR werr;
 570         TALLOC_CTX *mem_ctx;
 571         unsigned int orig_timeout;
 572         const char *tmp = NULL;
 573         const char *p;
 574
 575         /* Hmmmm. We can only open one connection to the NETLOGON pipe at the
 576          * moment.... */
 577
 578         if (IS_DC) {
 579                 return False;
 580         }
 581
 582         if (domain->primary) {
 583                 return False;
 584         }
 585
 586         our_domain = find_our_domain();
 587
 588         if ((mem_ctx = talloc_init("get_dc_name_via_netlogon")) == NULL) {
 589                 return False;
 590         }
 591
 592         result = cm_connect_netlogon(our_domain, &netlogon_pipe);
 593         if (!NT_STATUS_IS_OK(result)) {
 594                 talloc_destroy(mem_ctx);
 595                 return False;
 596         }
 597
 598         /* This call can take a long time - allow the server to time out.
 599            35 seconds should do it. */
 600
 601         orig_timeout = rpccli_set_timeout(netlogon_pipe, 35000);
 602
 603         if (our_domain->active_directory) {
 604                 struct netr_DsRGetDCNameInfo *domain_info = NULL;
 605
 606                 result = rpccli_netr_DsRGetDCName(netlogon_pipe,
 607                                                   mem_ctx,
 608                                                   our_domain->dcname,
 609                                                   domain->name,
 610                                                   NULL,
 611                                                   NULL,
 612                                                   DS_RETURN_DNS_NAME,
 613                                                   &domain_info,
 614                                                   &werr);
 615                 if (W_ERROR_IS_OK(werr)) {
 616                         tmp = talloc_strdup(
 617                                 mem_ctx, domain_info->dc_unc);
 618                         if (tmp == NULL) {
 619                                 DEBUG(0, ("talloc_strdup failed\n"));
 620                                 talloc_destroy(mem_ctx);
 621                                 return false;
 622                         }
 623                         if (strlen(domain->alt_name) == 0) {
 624                                 fstrcpy(domain->alt_name,
 625                                         domain_info->domain_name);
 626                         }
 627                         if (strlen(domain->forest_name) == 0) {
 628                                 fstrcpy(domain->forest_name,
 629                                         domain_info->forest_name);
 630                         }
 631                 }
 632         } else {
 633                 result = rpccli_netr_GetAnyDCName(netlogon_pipe, mem_ctx,
 634                                                   our_domain->dcname,
 635                                                   domain->name,
 636                                                   &tmp,
 637                                                   &werr);
 638         }
 639
 640         /* And restore our original timeout. */
 641         rpccli_set_timeout(netlogon_pipe, orig_timeout);
 642
 643         if (!NT_STATUS_IS_OK(result)) {
 644                 DEBUG(10,("rpccli_netr_GetAnyDCName failed: %s\n",
 645                         nt_errstr(result)));
 646                 talloc_destroy(mem_ctx);
 647                 return false;
 648         }
 649
 650         if (!W_ERROR_IS_OK(werr)) {
 651                 DEBUG(10,("rpccli_netr_GetAnyDCName failed: %s\n",
 652                            dos_errstr(werr)));
 653                 talloc_destroy(mem_ctx);
 654                 return false;
 655         }
 656
 657         /* rpccli_netr_GetAnyDCName gives us a name with \\ */
 658         p = tmp;
 659         if (*p == '\\') {
 660                 p+=1;
 661         }
 662         if (*p == '\\') {
 663                 p+=1;
 664         }
 665
 666         fstrcpy(dcname, p);
 667
 668         talloc_destroy(mem_ctx);
 669
 670         DEBUG(10,("rpccli_netr_GetAnyDCName returned %s\n", dcname));
 671
 672         if (!resolve_name(dcname, dc_ss, 0x20)) {
 673                 return False;
 674         }
 675
 676         return True;
 677 }
 678
 679 /**
 680  * Helper function to assemble trust password and account name
 681  */
 682 static NTSTATUS get_trust_creds(const struct winbindd_domain *domain,
 683                                 char **machine_password,
 684                                 char **machine_account,
 685                                 char **machine_krb5_principal)
 686 {
 687         const char *account_name;
 688         const char *name = NULL;
 689
 690         /* If we are a DC and this is not our own domain */
 691
 692         if (IS_DC) {
 693                 name = domain->name;
 694         } else {
 695                 struct winbindd_domain *our_domain = find_our_domain();
 696
 697                 if (!our_domain)
 698                         return NT_STATUS_INVALID_SERVER_STATE;
 699
 700                 name = our_domain->name;
 701         }
 702
 703         if (!get_trust_pw_clear(name, machine_password,
 704                                 &account_name, NULL))
 705         {
 706                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 707         }
 708
 709         if ((machine_account != NULL) &&
 710             (asprintf(machine_account, "%s$", account_name) == -1))
 711         {
 712                 return NT_STATUS_NO_MEMORY;
 713         }
 714
 715         /* this is at least correct when domain is our domain,
 716          * which is the only case, when this is currently used: */
 717         if (machine_krb5_principal != NULL)
 718         {
 719                 if (asprintf(machine_krb5_principal, "%s$@%s",
 720                              account_name, domain->alt_name) == -1)
 721                 {
 722                         return NT_STATUS_NO_MEMORY;
 723                 }
 724
 725                 strupper_m(*machine_krb5_principal);
 726         }
 727
 728         return NT_STATUS_OK;
 729 }
 730
 731 /************************************************************************
 732  Given a fd with a just-connected TCP connection to a DC, open a connection
 733  to the pipe.
 734 ************************************************************************/
 735
 736 static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
 737                                       const int sockfd,
 738                                       const char *controller,
 739                                       struct cli_state **cli,
 740                                       bool *retry)
 741 {
 742         char *machine_password = NULL;
 743         char *machine_krb5_principal = NULL;
 744         char *machine_account = NULL;
 745         char *ipc_username = NULL;
 746         char *ipc_domain = NULL;
 747         char *ipc_password = NULL;
 748
 749         struct named_mutex *mutex;
 750
 751         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
 752
 753         struct sockaddr peeraddr;
 754         socklen_t peeraddr_len;
 755
 756         struct sockaddr_in *peeraddr_in = (struct sockaddr_in *)&peeraddr;
 757
 758         DEBUG(10,("cm_prepare_connection: connecting to DC %s for domain %s\n",
 759                 controller, domain->name ));
 760
 761         *retry = True;
 762
 763         mutex = grab_named_mutex(talloc_tos(), controller,
 764                                  WINBIND_SERVER_MUTEX_WAIT_TIME);
 765         if (mutex == NULL) {
 766                 DEBUG(0,("cm_prepare_connection: mutex grab failed for %s\n",
 767                          controller));
 768                 result = NT_STATUS_POSSIBLE_DEADLOCK;
 769                 goto done;
 770         }
 771
 772         if ((*cli = cli_initialise()) == NULL) {
 773                 DEBUG(1, ("Could not cli_initialize\n"));
 774                 result = NT_STATUS_NO_MEMORY;
 775                 goto done;
 776         }
 777
 778         (*cli)->timeout = 10000;        /* 10 seconds */
 779         (*cli)->fd = sockfd;
 780         fstrcpy((*cli)->desthost, controller);
 781         (*cli)->use_kerberos = True;
 782
 783         peeraddr_len = sizeof(peeraddr);
 784
 785         if ((getpeername((*cli)->fd, &peeraddr, &peeraddr_len) != 0) ||
 786             (peeraddr_len != sizeof(struct sockaddr_in)) ||
 787             (peeraddr_in->sin_family != PF_INET))
 788         {
 789                 DEBUG(0,("cm_prepare_connection: %s\n", strerror(errno)));
 790                 result = NT_STATUS_UNSUCCESSFUL;
 791                 goto done;
 792         }
 793
 794         if (ntohs(peeraddr_in->sin_port) == 139) {
 795                 struct nmb_name calling;
 796                 struct nmb_name called;
 797
 798                 make_nmb_name(&calling, global_myname(), 0x0);
 799                 make_nmb_name(&called, "*SMBSERVER", 0x20);
 800
 801                 if (!cli_session_request(*cli, &calling, &called)) {
 802                         DEBUG(8, ("cli_session_request failed for %s\n",
 803                                   controller));
 804                         result = NT_STATUS_UNSUCCESSFUL;
 805                         goto done;
 806                 }
 807         }
 808
 809         cli_setup_signing_state(*cli, Undefined);
 810
 811         if (!cli_negprot(*cli)) {
 812                 DEBUG(1, ("cli_negprot failed\n"));
 813                 result = NT_STATUS_UNSUCCESSFUL;
 814                 goto done;
 815         }
 816
 817         if (!is_trusted_domain_situation(domain->name) &&
 818             (*cli)->protocol >= PROTOCOL_NT1 &&
 819             (*cli)->capabilities & CAP_EXTENDED_SECURITY)
 820         {
 821                 ADS_STATUS ads_status;
 822
 823                 result = get_trust_creds(domain, &machine_password,
 824                                          &machine_account,
 825                                          &machine_krb5_principal);
 826                 if (!NT_STATUS_IS_OK(result)) {
 827                         goto anon_fallback;
 828                 }
 829
 830                 if (lp_security() == SEC_ADS) {
 831
 832                         /* Try a krb5 session */
 833
 834                         (*cli)->use_kerberos = True;
 835                         DEBUG(5, ("connecting to %s from %s with kerberos principal "
 836                                   "[%s]\n", controller, global_myname(),
 837                                   machine_krb5_principal));
 838
 839                         winbindd_set_locator_kdc_envs(domain);
 840
 841                         ads_status = cli_session_setup_spnego(*cli,
 842                                                               machine_krb5_principal,
 843                                                               machine_password,
 844                                                               domain->name);
 845
 846                         if (!ADS_ERR_OK(ads_status)) {
 847                                 DEBUG(4,("failed kerberos session setup with %s\n",
 848                                          ads_errstr(ads_status)));
 849                         }
 850
 851                         result = ads_ntstatus(ads_status);
 852                         if (NT_STATUS_IS_OK(result)) {
 853                                 /* Ensure creds are stored for NTLMSSP authenticated pipe access. */
 854                                 cli_init_creds(*cli, machine_account, domain->name, machine_password);
 855                                 goto session_setup_done;
 856                         }
 857                 }
 858
 859                 /* Fall back to non-kerberos session setup using NTLMSSP SPNEGO with the machine account. */
 860                 (*cli)->use_kerberos = False;
 861
 862                 DEBUG(5, ("connecting to %s from %s with username "
 863                           "[%s]\\[%s]\n",  controller, global_myname(),
 864                           domain->name, machine_account));
 865
 866                 ads_status = cli_session_setup_spnego(*cli,
 867                                                       machine_account,
 868                                                       machine_password,
 869                                                       domain->name);
 870                 if (!ADS_ERR_OK(ads_status)) {
 871                         DEBUG(4, ("authenticated session setup failed with %s\n",
 872                                 ads_errstr(ads_status)));
 873                 }
 874
 875                 result = ads_ntstatus(ads_status);
 876                 if (NT_STATUS_IS_OK(result)) {
 877                         /* Ensure creds are stored for NTLMSSP authenticated pipe access. */
 878                         cli_init_creds(*cli, machine_account, domain->name, machine_password);
 879                         goto session_setup_done;
 880                 }
 881         }
 882
 883         /* Fall back to non-kerberos session setup with auth_user */
 884
 885         (*cli)->use_kerberos = False;
 886
 887         cm_get_ipc_userpass(&ipc_username, &ipc_domain, &ipc_password);
 888
 889         if ((((*cli)->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) != 0) &&
 890             (strlen(ipc_username) > 0)) {
 891
 892                 /* Only try authenticated if we have a username */
 893
 894                 DEBUG(5, ("connecting to %s from %s with username "
 895                           "[%s]\\[%s]\n",  controller, global_myname(),
 896                           ipc_domain, ipc_username));
 897
 898                 if (NT_STATUS_IS_OK(cli_session_setup(
 899                                             *cli, ipc_username,
 900                                             ipc_password, strlen(ipc_password)+1,
 901                                             ipc_password, strlen(ipc_password)+1,
 902                                             ipc_domain))) {
 903                         /* Successful logon with given username. */
 904                         cli_init_creds(*cli, ipc_username, ipc_domain, ipc_password);
 905                         goto session_setup_done;
 906                 } else {
 907                         DEBUG(4, ("authenticated session setup with user %s\\%s failed.\n",
 908                                 ipc_domain, ipc_username ));
 909                 }
 910         }
 911
 912  anon_fallback:
 913
 914         /* Fall back to anonymous connection, this might fail later */
 915
 916         if (NT_STATUS_IS_OK(cli_session_setup(*cli, "", NULL, 0,
 917                                               NULL, 0, ""))) {
 918                 DEBUG(5, ("Connected anonymously\n"));
 919                 cli_init_creds(*cli, "", "", "");
 920                 goto session_setup_done;
 921         }
 922
 923         result = cli_nt_error(*cli);
 924
 925         if (NT_STATUS_IS_OK(result))
 926                 result = NT_STATUS_UNSUCCESSFUL;
 927
 928         /* We can't session setup */
 929
 930         goto done;
 931
 932  session_setup_done:
 933
 934         /* cache the server name for later connections */
 935
 936         saf_store( domain->name, (*cli)->desthost );
 937         if (domain->alt_name && (*cli)->use_kerberos) {
 938                 saf_store( domain->alt_name, (*cli)->desthost );
 939         }
 940
 941         winbindd_set_locator_kdc_envs(domain);
 942
 943         if (!cli_send_tconX(*cli, "IPC$", "IPC", "", 0)) {
 944
 945                 result = cli_nt_error(*cli);
 946
 947                 DEBUG(1,("failed tcon_X with %s\n", nt_errstr(result)));
 948
 949                 if (NT_STATUS_IS_OK(result))
 950                         result = NT_STATUS_UNSUCCESSFUL;
 951
 952                 goto done;
 953         }
 954
 955         TALLOC_FREE(mutex);
 956         *retry = False;
 957
 958         /* set the domain if empty; needed for schannel connections */
 959         if ( !*(*cli)->domain ) {
 960                 fstrcpy( (*cli)->domain, domain->name );
 961         }
 962
 963         result = NT_STATUS_OK;
 964
 965  done:
 966         TALLOC_FREE(mutex);
 967         SAFE_FREE(machine_account);
 968         SAFE_FREE(machine_password);
 969         SAFE_FREE(machine_krb5_principal);
 970         SAFE_FREE(ipc_username);
 971         SAFE_FREE(ipc_domain);
 972         SAFE_FREE(ipc_password);
 973
 974         if (!NT_STATUS_IS_OK(result)) {
 975                 winbind_add_failed_connection_entry(domain, controller, result);
 976                 if ((*cli) != NULL) {
 977                         cli_shutdown(*cli);
 978                         *cli = NULL;
 979                 }
 980         }
 981
 982         return result;
 983 }
 984
 985 static bool add_one_dc_unique(TALLOC_CTX *mem_ctx, const char *domain_name,
 986                               const char *dcname, struct sockaddr_storage *pss,
 987                               struct dc_name_ip **dcs, int *num)
 988 {
 989         if (!NT_STATUS_IS_OK(check_negative_conn_cache(domain_name, dcname))) {
 990                 DEBUG(10, ("DC %s was in the negative conn cache\n", dcname));
 991                 return False;
 992         }
 993
 994         *dcs = TALLOC_REALLOC_ARRAY(mem_ctx, *dcs, struct dc_name_ip, (*num)+1);
 995
 996         if (*dcs == NULL)
 997                 return False;
 998
 999         fstrcpy((*dcs)[*num].name, dcname);
1000         (*dcs)[*num].ss = *pss;
1001         *num += 1;
1002         return True;
1003 }
1004
1005 static bool add_sockaddr_to_array(TALLOC_CTX *mem_ctx,
1006                                   struct sockaddr_storage *pss, uint16 port,
1007                                   struct sockaddr_storage **addrs, int *num)
1008 {
1009         *addrs = TALLOC_REALLOC_ARRAY(mem_ctx, *addrs, struct sockaddr_storage, (*num)+1);
1010
1011         if (*addrs == NULL) {
1012                 *num = 0;
1013                 return False;
1014         }
1015
1016         (*addrs)[*num] = *pss;
1017         set_sockaddr_port(&(*addrs)[*num], port);
1018
1019         *num += 1;
1020         return True;
1021 }
1022
1023 /*******************************************************************
1024  convert an ip to a name
1025 *******************************************************************/
1026
1027 static bool dcip_to_name(const struct winbindd_domain *domain,
1028                 struct sockaddr_storage *pss,
1029                 fstring name )
1030 {
1031         struct ip_service ip_list;
1032
1033         ip_list.ss = *pss;
1034         ip_list.port = 0;
1035
1036 #ifdef WITH_ADS
1037         /* For active directory servers, try to get the ldap server name.
1038            None of these failures should be considered critical for now */
1039
1040         if (lp_security() == SEC_ADS) {
1041                 ADS_STRUCT *ads;
1042                 char addr[INET6_ADDRSTRLEN];
1043
1044                 print_sockaddr(addr, sizeof(addr), pss);
1045
1046                 ads = ads_init(domain->alt_name, domain->name, NULL);
1047                 ads->auth.flags |= ADS_AUTH_NO_BIND;
1048
1049                 if (ads_try_connect(ads, addr)) {
1050                         /* We got a cldap packet. */
1051                         fstrcpy(name, ads->config.ldap_server_name);
1052                         namecache_store(name, 0x20, 1, &ip_list);
1053
1054                         DEBUG(10,("dcip_to_name: flags = 0x%x\n", (unsigned int)ads->config.flags));
1055
1056                         if (domain->primary && (ads->config.flags & ADS_KDC)) {
1057                                 if (ads_closest_dc(ads)) {
1058                                         char *sitename = sitename_fetch(ads->config.realm);
1059
1060                                         /* We're going to use this KDC for this realm/domain.
1061                                            If we are using sites, then force the krb5 libs
1062                                            to use this KDC. */
1063
1064                                         create_local_private_krb5_conf_for_domain(domain->alt_name,
1065                                                                         domain->name,
1066                                                                         sitename,
1067                                                                         pss);
1068
1069                                         SAFE_FREE(sitename);
1070                                 } else {
1071                                         /* use an off site KDC */
1072                                         create_local_private_krb5_conf_for_domain(domain->alt_name,
1073                                                                         domain->name,
1074                                                                         NULL,
1075                                                                         pss);
1076                                 }
1077                                 winbindd_set_locator_kdc_envs(domain);
1078
1079                                 /* Ensure we contact this DC also. */
1080                                 saf_store( domain->name, name);
1081                                 saf_store( domain->alt_name, name);
1082                         }
1083
1084                         ads_destroy( &ads );
1085                         return True;
1086                 }
1087
1088                 ads_destroy( &ads );
1089         }
1090 #endif
1091
1092         /* try GETDC requests next */
1093
1094         if (send_getdc_request(winbind_messaging_context(),
1095                                pss, domain->name, &domain->sid)) {
1096                 const char *dc_name = NULL;
1097                 int i;
1098                 smb_msleep(100);
1099                 for (i=0; i<5; i++) {
1100                         if (receive_getdc_response(pss, domain->name, &dc_name)) {
1101                                 fstrcpy(name, dc_name);
1102                                 namecache_store(name, 0x20, 1, &ip_list);
1103                                 return True;
1104                         }
1105                         smb_msleep(500);
1106                 }
1107         }
1108
1109         /* try node status request */
1110
1111         if ( name_status_find(domain->name, 0x1c, 0x20, pss, name) ) {
1112                 namecache_store(name, 0x20, 1, &ip_list);
1113                 return True;
1114         }
1115         return False;
1116 }
1117
1118 /*******************************************************************
1119  Retreive a list of IP address for domain controllers.  Fill in
1120  the dcs[]  with results.
1121 *******************************************************************/
1122
1123 static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
1124                     struct dc_name_ip **dcs, int *num_dcs)
1125 {
1126         fstring dcname;
1127         struct  sockaddr_storage ss;
1128         struct  ip_service *ip_list = NULL;
1129         int     iplist_size = 0;
1130         int     i;
1131         bool    is_our_domain;
1132         enum security_types sec = (enum security_types)lp_security();
1133
1134         is_our_domain = strequal(domain->name, lp_workgroup());
1135
1136         if ( !is_our_domain
1137                 && get_dc_name_via_netlogon(domain, dcname, &ss)
1138                 && add_one_dc_unique(mem_ctx, domain->name, dcname, &ss, dcs, num_dcs) )
1139         {
1140                 char addr[INET6_ADDRSTRLEN];
1141                 print_sockaddr(addr, sizeof(addr), &ss);
1142                 DEBUG(10, ("Retrieved DC %s at %s via netlogon\n",
1143                            dcname, addr));
1144                 return True;
1145         }
1146
1147         if (sec == SEC_ADS) {
1148                 char *sitename = NULL;
1149
1150                 /* We need to make sure we know the local site before
1151                    doing any DNS queries, as this will restrict the
1152                    get_sorted_dc_list() call below to only fetching
1153                    DNS records for the correct site. */
1154
1155                 /* Find any DC to get the site record.
1156                    We deliberately don't care about the
1157                    return here. */
1158
1159                 get_dc_name(domain->name, domain->alt_name, dcname, &ss);
1160
1161                 sitename = sitename_fetch(domain->alt_name);
1162                 if (sitename) {
1163
1164                         /* Do the site-specific AD dns lookup first. */
1165                         get_sorted_dc_list(domain->alt_name, sitename, &ip_list, &iplist_size, True);
1166
1167                         for ( i=0; i<iplist_size; i++ ) {
1168                                 char addr[INET6_ADDRSTRLEN];
1169                                 print_sockaddr(addr, sizeof(addr),
1170                                                 &ip_list[i].ss);
1171                                 add_one_dc_unique(mem_ctx,
1172                                                 domain->name,
1173                                                 addr,
1174                                                 &ip_list[i].ss,
1175                                                 dcs,
1176                                                 num_dcs);
1177                         }
1178
1179                         SAFE_FREE(ip_list);
1180                         SAFE_FREE(sitename);
1181                         iplist_size = 0;
1182                 }
1183
1184                 /* Now we add DCs from the main AD dns lookup. */
1185                 get_sorted_dc_list(domain->alt_name, NULL, &ip_list, &iplist_size, True);
1186
1187                 for ( i=0; i<iplist_size; i++ ) {
1188                         char addr[INET6_ADDRSTRLEN];
1189                         print_sockaddr(addr, sizeof(addr),
1190                                         &ip_list[i].ss);
1191                         add_one_dc_unique(mem_ctx,
1192                                         domain->name,
1193                                         addr,
1194                                         &ip_list[i].ss,
1195                                         dcs,
1196                                         num_dcs);
1197                 }
1198         }
1199
1200         /* try standard netbios queries if no ADS */
1201
1202         if (iplist_size==0) {
1203                 get_sorted_dc_list(domain->name, NULL, &ip_list, &iplist_size, False);
1204         }
1205
1206         /* FIXME!! this is where we should re-insert the GETDC requests --jerry */
1207
1208         /* now add to the dc array.  We'll wait until the last minute
1209            to look up the name of the DC.  But we fill in the char* for
1210            the ip now in to make the failed connection cache work */
1211
1212         for ( i=0; i<iplist_size; i++ ) {
1213                 char addr[INET6_ADDRSTRLEN];
1214                 print_sockaddr(addr, sizeof(addr),
1215                                 &ip_list[i].ss);
1216                 add_one_dc_unique(mem_ctx, domain->name, addr,
1217                         &ip_list[i].ss, dcs, num_dcs);
1218         }
1219
1220         SAFE_FREE( ip_list );
1221
1222         return True;
1223 }
1224
1225 static bool find_new_dc(TALLOC_CTX *mem_ctx,
1226                         struct winbindd_domain *domain,
1227                         fstring dcname, struct sockaddr_storage *pss, int *fd)
1228 {
1229         struct dc_name_ip *dcs = NULL;
1230         int num_dcs = 0;
1231
1232         const char **dcnames = NULL;
1233         int num_dcnames = 0;
1234
1235         struct sockaddr_storage *addrs = NULL;
1236         int num_addrs = 0;
1237
1238         int i, fd_index;
1239
1240  again:
1241         if (!get_dcs(mem_ctx, domain, &dcs, &num_dcs) || (num_dcs == 0))
1242                 return False;
1243
1244         for (i=0; i<num_dcs; i++) {
1245
1246                 if (!add_string_to_array(mem_ctx, dcs[i].name,
1247                                     &dcnames, &num_dcnames)) {
1248                         return False;
1249                 }
1250                 if (!add_sockaddr_to_array(mem_ctx, &dcs[i].ss, 445,
1251                                       &addrs, &num_addrs)) {
1252                         return False;
1253                 }
1254
1255                 if (!add_string_to_array(mem_ctx, dcs[i].name,
1256                                     &dcnames, &num_dcnames)) {
1257                         return False;
1258                 }
1259                 if (!add_sockaddr_to_array(mem_ctx, &dcs[i].ss, 139,
1260                                       &addrs, &num_addrs)) {
1261                         return False;
1262                 }
1263         }
1264
1265         if ((num_dcnames == 0) || (num_dcnames != num_addrs))
1266                 return False;
1267
1268         if ((addrs == NULL) || (dcnames == NULL))
1269                 return False;
1270
1271         /* 5 second timeout. */
1272         if (!open_any_socket_out(addrs, num_addrs, 5000, &fd_index, fd) ) {
1273                 for (i=0; i<num_dcs; i++) {
1274                         char ab[INET6_ADDRSTRLEN];
1275                         print_sockaddr(ab, sizeof(ab), &dcs[i].ss);
1276                         DEBUG(10, ("find_new_dc: open_any_socket_out failed for "
1277                                 "domain %s address %s. Error was %s\n",
1278                                 domain->name, ab, strerror(errno) ));
1279                         winbind_add_failed_connection_entry(domain,
1280                                 dcs[i].name, NT_STATUS_UNSUCCESSFUL);
1281                 }
1282                 return False;
1283         }
1284
1285         *pss = addrs[fd_index];
1286
1287         if (*dcnames[fd_index] != '\0' && !is_ipaddress(dcnames[fd_index])) {
1288                 /* Ok, we've got a name for the DC */
1289                 fstrcpy(dcname, dcnames[fd_index]);
1290                 return True;
1291         }
1292
1293         /* Try to figure out the name */
1294         if (dcip_to_name(domain, pss, dcname)) {
1295                 return True;
1296         }
1297
1298         /* We can not continue without the DC's name */
1299         winbind_add_failed_connection_entry(domain, dcs[fd_index].name,
1300                                     NT_STATUS_UNSUCCESSFUL);
1301         goto again;
1302 }
1303
1304 static NTSTATUS cm_open_connection(struct winbindd_domain *domain,
1305                                    struct winbindd_cm_conn *new_conn)
1306 {
1307         TALLOC_CTX *mem_ctx;
1308         NTSTATUS result;
1309         char *saf_servername = saf_fetch( domain->name );
1310         int retries;
1311
1312         if ((mem_ctx = talloc_init("cm_open_connection")) == NULL) {
1313                 SAFE_FREE(saf_servername);
1314                 set_domain_offline(domain);
1315                 return NT_STATUS_NO_MEMORY;
1316         }
1317
1318         /* we have to check the server affinity cache here since
1319            later we selecte a DC based on response time and not preference */
1320
1321         /* Check the negative connection cache
1322            before talking to it. It going down may have
1323            triggered the reconnection. */
1324
1325         if ( saf_servername && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, saf_servername))) {
1326
1327                 DEBUG(10,("cm_open_connection: saf_servername is '%s' for domain %s\n",
1328                         saf_servername, domain->name ));
1329
1330                 /* convert an ip address to a name */
1331                 if (is_ipaddress( saf_servername ) ) {
1332                         fstring saf_name;
1333                         struct sockaddr_storage ss;
1334
1335                         if (!interpret_string_addr(&ss, saf_servername,
1336                                                 AI_NUMERICHOST)) {
1337                                 return NT_STATUS_UNSUCCESSFUL;
1338                         }
1339                         if (dcip_to_name( domain, &ss, saf_name )) {
1340                                 fstrcpy( domain->dcname, saf_name );
1341                         } else {
1342                                 winbind_add_failed_connection_entry(
1343                                         domain, saf_servername,
1344                                         NT_STATUS_UNSUCCESSFUL);
1345                         }
1346                 } else {
1347                         fstrcpy( domain->dcname, saf_servername );
1348                 }
1349
1350                 SAFE_FREE( saf_servername );
1351         }
1352
1353         for (retries = 0; retries < 3; retries++) {
1354                 int fd = -1;
1355                 bool retry = False;
1356
1357                 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1358
1359                 DEBUG(10,("cm_open_connection: dcname is '%s' for domain %s\n",
1360                         domain->dcname, domain->name ));
1361
1362                 if (*domain->dcname
1363                         && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, domain->dcname))
1364                         && (resolve_name(domain->dcname, &domain->dcaddr, 0x20)))
1365                 {
1366                         struct sockaddr_storage *addrs = NULL;
1367                         int num_addrs = 0;
1368                         int dummy = 0;
1369
1370                         if (!add_sockaddr_to_array(mem_ctx, &domain->dcaddr, 445, &addrs, &num_addrs)) {
1371                                 set_domain_offline(domain);
1372                                 talloc_destroy(mem_ctx);
1373                                 return NT_STATUS_NO_MEMORY;
1374                         }
1375                         if (!add_sockaddr_to_array(mem_ctx, &domain->dcaddr, 139, &addrs, &num_addrs)) {
1376                                 set_domain_offline(domain);
1377                                 talloc_destroy(mem_ctx);
1378                                 return NT_STATUS_NO_MEMORY;
1379                         }
1380
1381                         /* 5 second timeout. */
1382                         if (!open_any_socket_out(addrs, num_addrs, 5000, &dummy, &fd)) {
1383                                 fd = -1;
1384                         }
1385                 }
1386
1387                 if ((fd == -1)
1388                         && !find_new_dc(mem_ctx, domain, domain->dcname, &domain->dcaddr, &fd))
1389                 {
1390                         /* This is the one place where we will
1391                            set the global winbindd offline state
1392                            to true, if a "WINBINDD_OFFLINE" entry
1393                            is found in the winbindd cache. */
1394                         set_global_winbindd_state_offline();
1395                         break;
1396                 }
1397
1398                 new_conn->cli = NULL;
1399
1400                 result = cm_prepare_connection(domain, fd, domain->dcname,
1401                         &new_conn->cli, &retry);
1402
1403                 if (!retry)
1404                         break;
1405         }
1406
1407         if (NT_STATUS_IS_OK(result)) {
1408
1409                 winbindd_set_locator_kdc_envs(domain);
1410
1411                 if (domain->online == False) {
1412                         /* We're changing state from offline to online. */
1413                         set_global_winbindd_state_online();
1414                 }
1415                 set_domain_online(domain);
1416         } else {
1417                 /* Ensure we setup the retry handler. */
1418                 set_domain_offline(domain);
1419         }
1420
1421         talloc_destroy(mem_ctx);
1422         return result;
1423 }
1424
1425 /* Close down all open pipes on a connection. */
1426
1427 void invalidate_cm_connection(struct winbindd_cm_conn *conn)
1428 {
1429         /* We're closing down a possibly dead
1430            connection. Don't have impossibly long (10s) timeouts. */
1431
1432         if (conn->cli) {
1433                 cli_set_timeout(conn->cli, 1000); /* 1 second. */
1434         }
1435
1436         if (conn->samr_pipe != NULL) {
1437                 TALLOC_FREE(conn->samr_pipe);
1438                 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1439                 if (conn->cli) {
1440                         cli_set_timeout(conn->cli, 500);
1441                 }
1442         }
1443
1444         if (conn->lsa_pipe != NULL) {
1445                 TALLOC_FREE(conn->lsa_pipe);
1446                 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1447                 if (conn->cli) {
1448                         cli_set_timeout(conn->cli, 500);
1449                 }
1450         }
1451
1452         if (conn->netlogon_pipe != NULL) {
1453                 TALLOC_FREE(conn->netlogon_pipe);
1454                 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1455                 if (conn->cli) {
1456                         cli_set_timeout(conn->cli, 500);
1457                 }
1458         }
1459
1460         if (conn->cli) {
1461                 cli_shutdown(conn->cli);
1462         }
1463
1464         conn->cli = NULL;
1465 }
1466
1467 void close_conns_after_fork(void)
1468 {
1469         struct winbindd_domain *domain;
1470
1471         for (domain = domain_list(); domain; domain = domain->next) {
1472                 if (domain->conn.cli == NULL)
1473                         continue;
1474
1475                 if (domain->conn.cli->fd == -1)
1476                         continue;
1477
1478                 close(domain->conn.cli->fd);
1479                 domain->conn.cli->fd = -1;
1480         }
1481 }
1482
1483 static bool connection_ok(struct winbindd_domain *domain)
1484 {
1485         if (domain->conn.cli == NULL) {
1486                 DEBUG(8, ("connection_ok: Connection to %s for domain %s has NULL "
1487                           "cli!\n", domain->dcname, domain->name));
1488                 return False;
1489         }
1490
1491         if (!domain->conn.cli->initialised) {
1492                 DEBUG(3, ("connection_ok: Connection to %s for domain %s was never "
1493                           "initialised!\n", domain->dcname, domain->name));
1494                 return False;
1495         }
1496
1497         if (domain->conn.cli->fd == -1) {
1498                 DEBUG(3, ("connection_ok: Connection to %s for domain %s has died or was "
1499                           "never started (fd == -1)\n",
1500                           domain->dcname, domain->name));
1501                 return False;
1502         }
1503
1504         if (domain->online == False) {
1505                 DEBUG(3, ("connection_ok: Domain %s is offline\n", domain->name));
1506                 return False;
1507         }
1508
1509         return True;
1510 }
1511
1512 /* Initialize a new connection up to the RPC BIND.
1513    Bypass online status check so always does network calls. */
1514
1515 static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain)
1516 {
1517         NTSTATUS result;
1518
1519         /* Internal connections never use the network. */
1520         if (domain->internal) {
1521                 domain->initialized = True;
1522                 return NT_STATUS_OK;
1523         }
1524
1525         if (connection_ok(domain)) {
1526                 if (!domain->initialized) {
1527                         set_dc_type_and_flags(domain);
1528                 }
1529                 return NT_STATUS_OK;
1530         }
1531
1532         invalidate_cm_connection(&domain->conn);
1533
1534         result = cm_open_connection(domain, &domain->conn);
1535
1536         if (NT_STATUS_IS_OK(result) && !domain->initialized) {
1537                 set_dc_type_and_flags(domain);
1538         }
1539
1540         return result;
1541 }
1542
1543 NTSTATUS init_dc_connection(struct winbindd_domain *domain)
1544 {
1545         if (domain->initialized && !domain->online) {
1546                 /* We check for online status elsewhere. */
1547                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1548         }
1549
1550         return init_dc_connection_network(domain);
1551 }
1552
1553 /******************************************************************************
1554  Set the trust flags (direction and forest location) for a domain
1555 ******************************************************************************/
1556
1557 static bool set_dc_type_and_flags_trustinfo( struct winbindd_domain *domain )
1558 {
1559         struct winbindd_domain *our_domain;
1560         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
1561         struct netr_DomainTrustList trusts;
1562         int i;
1563         uint32 flags = (NETR_TRUST_FLAG_IN_FOREST |
1564                         NETR_TRUST_FLAG_OUTBOUND |
1565                         NETR_TRUST_FLAG_INBOUND);
1566         struct rpc_pipe_client *cli;
1567         TALLOC_CTX *mem_ctx = NULL;
1568
1569         DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s\n", domain->name ));
1570
1571         /* Our primary domain doesn't need to worry about trust flags.
1572            Force it to go through the network setup */
1573         if ( domain->primary ) {
1574                 return False;
1575         }
1576
1577         our_domain = find_our_domain();
1578
1579         if ( !connection_ok(our_domain) ) {
1580                 DEBUG(3,("set_dc_type_and_flags_trustinfo: No connection to our domain!\n"));
1581                 return False;
1582         }
1583
1584         /* This won't work unless our domain is AD */
1585
1586         if ( !our_domain->active_directory ) {
1587                 return False;
1588         }
1589
1590         /* Use DsEnumerateDomainTrusts to get us the trust direction
1591            and type */
1592
1593         result = cm_connect_netlogon(our_domain, &cli);
1594
1595         if (!NT_STATUS_IS_OK(result)) {
1596                 DEBUG(5, ("set_dc_type_and_flags_trustinfo: Could not open "
1597                           "a connection to %s for PIPE_NETLOGON (%s)\n",
1598                           domain->name, nt_errstr(result)));
1599                 return False;
1600         }
1601
1602         if ( (mem_ctx = talloc_init("set_dc_type_and_flags_trustinfo")) == NULL ) {
1603                 DEBUG(0,("set_dc_type_and_flags_trustinfo: talloc_init() failed!\n"));
1604                 return False;
1605         }
1606
1607         result = rpccli_netr_DsrEnumerateDomainTrusts(cli, mem_ctx,
1608                                                       cli->desthost,
1609                                                       flags,
1610                                                       &trusts,
1611                                                       NULL);
1612         if (!NT_STATUS_IS_OK(result)) {
1613                 DEBUG(0,("set_dc_type_and_flags_trustinfo: "
1614                         "failed to query trusted domain list: %s\n",
1615                         nt_errstr(result)));
1616                 talloc_destroy(mem_ctx);
1617                 return false;
1618         }
1619
1620         /* Now find the domain name and get the flags */
1621
1622         for ( i=0; i<trusts.count; i++ ) {
1623                 if ( strequal( domain->name, trusts.array[i].netbios_name) ) {
1624                         domain->domain_flags          = trusts.array[i].trust_flags;
1625                         domain->domain_type           = trusts.array[i].trust_type;
1626                         domain->domain_trust_attribs  = trusts.array[i].trust_attributes;
1627
1628                         if ( domain->domain_type == NETR_TRUST_TYPE_UPLEVEL )
1629                                 domain->active_directory = True;
1630
1631                         /* This flag is only set if the domain is *our*
1632                            primary domain and the primary domain is in
1633                            native mode */
1634
1635                         domain->native_mode = (domain->domain_flags & NETR_TRUST_FLAG_NATIVE);
1636
1637                         DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s is %sin "
1638                                   "native mode.\n", domain->name,
1639                                   domain->native_mode ? "" : "NOT "));
1640
1641                         DEBUG(5,("set_dc_type_and_flags_trustinfo: domain %s is %s"
1642                                  "running active directory.\n", domain->name,
1643                                  domain->active_directory ? "" : "NOT "));
1644
1645
1646                         domain->initialized = True;
1647
1648                         if ( !winbindd_can_contact_domain( domain) )
1649                                 domain->internal = True;
1650
1651                         break;
1652                 }
1653         }
1654
1655         talloc_destroy( mem_ctx );
1656
1657         return domain->initialized;
1658 }
1659
1660 /******************************************************************************
1661  We can 'sense' certain things about the DC by it's replies to certain
1662  questions.
1663
1664  This tells us if this particular remote server is Active Directory, and if it
1665  is native mode.
1666 ******************************************************************************/
1667
1668 static void set_dc_type_and_flags_connect( struct winbindd_domain *domain )
1669 {
1670         NTSTATUS                result;
1671         WERROR werr;
1672         TALLOC_CTX              *mem_ctx = NULL;
1673         struct rpc_pipe_client  *cli;
1674         POLICY_HND pol;
1675         union dssetup_DsRoleInfo info;
1676         union lsa_PolicyInformation *lsa_info = NULL;
1677
1678         if (!connection_ok(domain)) {
1679                 return;
1680         }
1681
1682         mem_ctx = talloc_init("set_dc_type_and_flags on domain %s\n",
1683                               domain->name);
1684         if (!mem_ctx) {
1685                 DEBUG(1, ("set_dc_type_and_flags_connect: talloc_init() failed\n"));
1686                 return;
1687         }
1688
1689         DEBUG(5, ("set_dc_type_and_flags_connect: domain %s\n", domain->name ));
1690
1691         cli = cli_rpc_pipe_open_noauth(domain->conn.cli, PI_DSSETUP,
1692                                        &result);
1693
1694         if (cli == NULL) {
1695                 DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
1696                           "PI_DSSETUP on domain %s: (%s)\n",
1697                           domain->name, nt_errstr(result)));
1698
1699                 /* if this is just a non-AD domain we need to continue
1700                  * identifying so that we can in the end return with
1701                  * domain->initialized = True - gd */
1702
1703                 goto no_dssetup;
1704         }
1705
1706         result = rpccli_dssetup_DsRoleGetPrimaryDomainInformation(cli, mem_ctx,
1707                                                                   DS_ROLE_BASIC_INFORMATION,
1708                                                                   &info,
1709                                                                   &werr);
1710         TALLOC_FREE(cli);
1711
1712         if (!NT_STATUS_IS_OK(result)) {
1713                 DEBUG(5, ("set_dc_type_and_flags_connect: rpccli_ds_getprimarydominfo "
1714                           "on domain %s failed: (%s)\n",
1715                           domain->name, nt_errstr(result)));
1716
1717                 /* older samba3 DCs will return DCERPC_FAULT_OP_RNG_ERROR for
1718                  * every opcode on the DSSETUP pipe, continue with
1719                  * no_dssetup mode here as well to get domain->initialized
1720                  * set - gd */
1721
1722                 if (NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR) {
1723                         goto no_dssetup;
1724                 }
1725
1726                 TALLOC_FREE(mem_ctx);
1727                 return;
1728         }
1729
1730         if ((info.basic.flags & DS_ROLE_PRIMARY_DS_RUNNING) &&
1731             !(info.basic.flags & DS_ROLE_PRIMARY_DS_MIXED_MODE)) {
1732                 domain->native_mode = True;
1733         } else {
1734                 domain->native_mode = False;
1735         }
1736
1737 no_dssetup:
1738         cli = cli_rpc_pipe_open_noauth(domain->conn.cli, PI_LSARPC, &result);
1739
1740         if (cli == NULL) {
1741                 DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
1742                           "PI_LSARPC on domain %s: (%s)\n",
1743                           domain->name, nt_errstr(result)));
1744                 TALLOC_FREE(cli);
1745                 TALLOC_FREE(mem_ctx);
1746                 return;
1747         }
1748
1749         result = rpccli_lsa_open_policy2(cli, mem_ctx, True,
1750                                          SEC_RIGHTS_MAXIMUM_ALLOWED, &pol);
1751
1752         if (NT_STATUS_IS_OK(result)) {
1753                 /* This particular query is exactly what Win2k clients use
1754                    to determine that the DC is active directory */
1755                 result = rpccli_lsa_QueryInfoPolicy2(cli, mem_ctx,
1756                                                      &pol,
1757                                                      LSA_POLICY_INFO_DNS,
1758                                                      &lsa_info);
1759         }
1760
1761         if (NT_STATUS_IS_OK(result)) {
1762                 domain->active_directory = True;
1763
1764                 if (lsa_info->dns.name.string) {
1765                         fstrcpy(domain->name, lsa_info->dns.name.string);
1766                 }
1767
1768                 if (lsa_info->dns.dns_domain.string) {
1769                         fstrcpy(domain->alt_name,
1770                                 lsa_info->dns.dns_domain.string);
1771                 }
1772
1773                 /* See if we can set some domain trust flags about
1774                    ourself */
1775
1776                 if (lsa_info->dns.dns_forest.string) {
1777                         fstrcpy(domain->forest_name,
1778                                 lsa_info->dns.dns_forest.string);
1779
1780                         if (strequal(domain->forest_name, domain->alt_name)) {
1781                                 domain->domain_flags |= NETR_TRUST_FLAG_TREEROOT;
1782                         }
1783                 }
1784
1785                 if (lsa_info->dns.sid) {
1786                         sid_copy(&domain->sid, lsa_info->dns.sid);
1787                 }
1788         } else {
1789                 domain->active_directory = False;
1790
1791                 result = rpccli_lsa_open_policy(cli, mem_ctx, True,
1792                                                 SEC_RIGHTS_MAXIMUM_ALLOWED,
1793                                                 &pol);
1794
1795                 if (!NT_STATUS_IS_OK(result)) {
1796                         goto done;
1797                 }
1798
1799                 result = rpccli_lsa_QueryInfoPolicy(cli, mem_ctx,
1800                                                     &pol,
1801                                                     LSA_POLICY_INFO_ACCOUNT_DOMAIN,
1802                                                     &lsa_info);
1803
1804                 if (NT_STATUS_IS_OK(result)) {
1805
1806                         if (lsa_info->account_domain.name.string) {
1807                                 fstrcpy(domain->name,
1808                                         lsa_info->account_domain.name.string);
1809                         }
1810
1811                         if (lsa_info->account_domain.sid) {
1812                                 sid_copy(&domain->sid, lsa_info->account_domain.sid);
1813                         }
1814                 }
1815         }
1816 done:
1817
1818         DEBUG(5, ("set_dc_type_and_flags_connect: domain %s is %sin native mode.\n",
1819                   domain->name, domain->native_mode ? "" : "NOT "));
1820
1821         DEBUG(5,("set_dc_type_and_flags_connect: domain %s is %srunning active directory.\n",
1822                   domain->name, domain->active_directory ? "" : "NOT "));
1823
1824         TALLOC_FREE(cli);
1825
1826         TALLOC_FREE(mem_ctx);
1827
1828         domain->initialized = True;
1829 }
1830
1831 /**********************************************************************
1832  Set the domain_flags (trust attributes, domain operating modes, etc...
1833 ***********************************************************************/
1834
1835 static void set_dc_type_and_flags( struct winbindd_domain *domain )
1836 {
1837         /* we always have to contact our primary domain */
1838
1839         if ( domain->primary ) {
1840                 DEBUG(10,("set_dc_type_and_flags: setting up flags for "
1841                           "primary domain\n"));
1842                 set_dc_type_and_flags_connect( domain );
1843                 return;
1844         }
1845
1846         /* Use our DC to get the information if possible */
1847
1848         if ( !set_dc_type_and_flags_trustinfo( domain ) ) {
1849                 /* Otherwise, fallback to contacting the
1850                    domain directly */
1851                 set_dc_type_and_flags_connect( domain );
1852         }
1853
1854         return;
1855 }
1856
1857
1858
1859 /**********************************************************************
1860 ***********************************************************************/
1861
1862 static bool cm_get_schannel_dcinfo(struct winbindd_domain *domain,
1863                                    struct dcinfo **ppdc)
1864 {
1865         NTSTATUS result;
1866         struct rpc_pipe_client *netlogon_pipe;
1867
1868         if (lp_client_schannel() == False) {
1869                 return False;
1870         }
1871
1872         result = cm_connect_netlogon(domain, &netlogon_pipe);
1873         if (!NT_STATUS_IS_OK(result)) {
1874                 return False;
1875         }
1876
1877         /* Return a pointer to the struct dcinfo from the
1878            netlogon pipe. */
1879
1880         *ppdc = domain->conn.netlogon_pipe->dc;
1881         return True;
1882 }
1883
1884 NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
1885                         struct rpc_pipe_client **cli, POLICY_HND *sam_handle)
1886 {
1887         struct winbindd_cm_conn *conn;
1888         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
1889         fstring conn_pwd;
1890         struct dcinfo *p_dcinfo;
1891         char *machine_password = NULL;
1892         char *machine_account = NULL;
1893         char *domain_name = NULL;
1894
1895         result = init_dc_connection(domain);
1896         if (!NT_STATUS_IS_OK(result)) {
1897                 return result;
1898         }
1899
1900         conn = &domain->conn;
1901
1902         if (conn->samr_pipe != NULL) {
1903                 goto done;
1904         }
1905
1906         /*
1907          * No SAMR pipe yet. Attempt to get an NTLMSSP SPNEGO authenticated
1908          * sign and sealed pipe using the machine account password by
1909          * preference. If we can't - try schannel, if that fails, try
1910          * anonymous.
1911          */
1912
1913         pwd_get_cleartext(&conn->cli->pwd, conn_pwd);
1914         if ((conn->cli->user_name[0] == '\0') ||
1915             (conn->cli->domain[0] == '\0') ||
1916             (conn_pwd[0] == '\0'))
1917         {
1918                 result = get_trust_creds(domain, &machine_password,
1919                                          &machine_account, NULL);
1920                 if (!NT_STATUS_IS_OK(result)) {
1921                         DEBUG(10, ("cm_connect_sam: No no user available for "
1922                                    "domain %s, trying schannel\n", conn->cli->domain));
1923                         goto schannel;
1924                 }
1925                 domain_name = domain->name;
1926         } else {
1927                 machine_password = SMB_STRDUP(conn_pwd);
1928                 machine_account = SMB_STRDUP(conn->cli->user_name);
1929                 domain_name = conn->cli->domain;
1930         }
1931
1932         if (!machine_password || !machine_account) {
1933                 result = NT_STATUS_NO_MEMORY;
1934                 goto done;
1935         }
1936
1937         /* We have an authenticated connection. Use a NTLMSSP SPNEGO
1938            authenticated SAMR pipe with sign & seal. */
1939         conn->samr_pipe =
1940                 cli_rpc_pipe_open_spnego_ntlmssp(conn->cli, PI_SAMR,
1941                                                  PIPE_AUTH_LEVEL_PRIVACY,
1942                                                  domain_name,
1943                                                  machine_account,
1944                                                  machine_password, &result);
1945
1946         if (conn->samr_pipe == NULL) {
1947                 DEBUG(10,("cm_connect_sam: failed to connect to SAMR "
1948                           "pipe for domain %s using NTLMSSP "
1949                           "authenticated pipe: user %s\\%s. Error was "
1950                           "%s\n", domain->name, domain_name,
1951                           machine_account, nt_errstr(result)));
1952                 goto schannel;
1953         }
1954
1955         DEBUG(10,("cm_connect_sam: connected to SAMR pipe for "
1956                   "domain %s using NTLMSSP authenticated "
1957                   "pipe: user %s\\%s\n", domain->name,
1958                   domain_name, machine_account));
1959
1960         result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
1961                                       conn->samr_pipe->desthost,
1962                                       SEC_RIGHTS_MAXIMUM_ALLOWED,
1963                                       &conn->sam_connect_handle);
1964         if (NT_STATUS_IS_OK(result)) {
1965                 goto open_domain;
1966         }
1967         DEBUG(10,("cm_connect_sam: ntlmssp-sealed rpccli_samr_Connect2 "
1968                   "failed for domain %s, error was %s. Trying schannel\n",
1969                   domain->name, nt_errstr(result) ));
1970         TALLOC_FREE(conn->samr_pipe);
1971
1972  schannel:
1973
1974         /* Fall back to schannel if it's a W2K pre-SP1 box. */
1975
1976         if (!cm_get_schannel_dcinfo(domain, &p_dcinfo)) {
1977                 /* If this call fails - conn->cli can now be NULL ! */
1978                 DEBUG(10, ("cm_connect_sam: Could not get schannel auth info "
1979                            "for domain %s, trying anon\n", domain->name));
1980                 goto anonymous;
1981         }
1982         conn->samr_pipe = cli_rpc_pipe_open_schannel_with_key
1983                 (conn->cli, PI_SAMR, PIPE_AUTH_LEVEL_PRIVACY,
1984                  domain->name, p_dcinfo, &result);
1985
1986         if (conn->samr_pipe == NULL) {
1987                 DEBUG(10,("cm_connect_sam: failed to connect to SAMR pipe for "
1988                           "domain %s using schannel. Error was %s\n",
1989                           domain->name, nt_errstr(result) ));
1990                 goto anonymous;
1991         }
1992         DEBUG(10,("cm_connect_sam: connected to SAMR pipe for domain %s using "
1993                   "schannel.\n", domain->name ));
1994
1995         result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
1996                                       conn->samr_pipe->desthost,
1997                                       SEC_RIGHTS_MAXIMUM_ALLOWED,
1998                                       &conn->sam_connect_handle);
1999         if (NT_STATUS_IS_OK(result)) {
2000                 goto open_domain;
2001         }
2002         DEBUG(10,("cm_connect_sam: schannel-sealed rpccli_samr_Connect2 failed "
2003                   "for domain %s, error was %s. Trying anonymous\n",
2004                   domain->name, nt_errstr(result) ));
2005         TALLOC_FREE(conn->samr_pipe);
2006
2007  anonymous:
2008
2009         /* Finally fall back to anonymous. */
2010         conn->samr_pipe = cli_rpc_pipe_open_noauth(conn->cli, PI_SAMR,
2011                                                    &result);
2012
2013         if (conn->samr_pipe == NULL) {
2014                 result = NT_STATUS_PIPE_NOT_AVAILABLE;
2015                 goto done;
2016         }
2017
2018         result = rpccli_samr_Connect2(conn->samr_pipe, mem_ctx,
2019                                       conn->samr_pipe->desthost,
2020                                       SEC_RIGHTS_MAXIMUM_ALLOWED,
2021                                       &conn->sam_connect_handle);
2022         if (!NT_STATUS_IS_OK(result)) {
2023                 DEBUG(10,("cm_connect_sam: rpccli_samr_Connect2 failed "
2024                           "for domain %s Error was %s\n",
2025                           domain->name, nt_errstr(result) ));
2026                 goto done;
2027         }
2028
2029  open_domain:
2030         result = rpccli_samr_OpenDomain(conn->samr_pipe,
2031                                         mem_ctx,
2032                                         &conn->sam_connect_handle,
2033                                         SEC_RIGHTS_MAXIMUM_ALLOWED,
2034                                         &domain->sid,
2035                                         &conn->sam_domain_handle);
2036
2037  done:
2038
2039         if (!NT_STATUS_IS_OK(result)) {
2040                 invalidate_cm_connection(conn);
2041                 return result;
2042         }
2043
2044         *cli = conn->samr_pipe;
2045         *sam_handle = conn->sam_domain_handle;
2046         SAFE_FREE(machine_password);
2047         SAFE_FREE(machine_account);
2048         return result;
2049 }
2050
2051 NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
2052                         struct rpc_pipe_client **cli, POLICY_HND *lsa_policy)
2053 {
2054         struct winbindd_cm_conn *conn;
2055         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
2056         fstring conn_pwd;
2057         struct dcinfo *p_dcinfo;
2058
2059         result = init_dc_connection(domain);
2060         if (!NT_STATUS_IS_OK(result))
2061                 return result;
2062
2063         conn = &domain->conn;
2064
2065         if (conn->lsa_pipe != NULL) {
2066                 goto done;
2067         }
2068
2069         pwd_get_cleartext(&conn->cli->pwd, conn_pwd);
2070         if ((conn->cli->user_name[0] == '\0') ||
2071             (conn->cli->domain[0] == '\0') ||
2072             (conn_pwd[0] == '\0')) {
2073                 DEBUG(10, ("cm_connect_lsa: No no user available for "
2074                            "domain %s, trying schannel\n", conn->cli->domain));
2075                 goto schannel;
2076         }
2077
2078         /* We have an authenticated connection. Use a NTLMSSP SPNEGO
2079          * authenticated LSA pipe with sign & seal. */
2080         conn->lsa_pipe = cli_rpc_pipe_open_spnego_ntlmssp
2081                 (conn->cli, PI_LSARPC, PIPE_AUTH_LEVEL_PRIVACY,
2082                  conn->cli->domain, conn->cli->user_name, conn_pwd, &result);
2083
2084         if (conn->lsa_pipe == NULL) {
2085                 DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
2086                           "domain %s using NTLMSSP authenticated pipe: user "
2087                           "%s\\%s. Error was %s. Trying schannel.\n",
2088                           domain->name, conn->cli->domain,
2089                           conn->cli->user_name, nt_errstr(result)));
2090                 goto schannel;
2091         }
2092
2093         DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
2094                   "NTLMSSP authenticated pipe: user %s\\%s\n",
2095                   domain->name, conn->cli->domain, conn->cli->user_name ));
2096
2097         result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2098                                         SEC_RIGHTS_MAXIMUM_ALLOWED,
2099                                         &conn->lsa_policy);
2100         if (NT_STATUS_IS_OK(result)) {
2101                 goto done;
2102         }
2103
2104         DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
2105                   "schannel\n"));
2106
2107         TALLOC_FREE(conn->lsa_pipe);
2108
2109  schannel:
2110
2111         /* Fall back to schannel if it's a W2K pre-SP1 box. */
2112
2113         if (!cm_get_schannel_dcinfo(domain, &p_dcinfo)) {
2114                 /* If this call fails - conn->cli can now be NULL ! */
2115                 DEBUG(10, ("cm_connect_lsa: Could not get schannel auth info "
2116                            "for domain %s, trying anon\n", domain->name));
2117                 goto anonymous;
2118         }
2119         conn->lsa_pipe = cli_rpc_pipe_open_schannel_with_key
2120                 (conn->cli, PI_LSARPC, PIPE_AUTH_LEVEL_PRIVACY,
2121                  domain->name, p_dcinfo, &result);
2122
2123         if (conn->lsa_pipe == NULL) {
2124                 DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
2125                           "domain %s using schannel. Error was %s\n",
2126                           domain->name, nt_errstr(result) ));
2127                 goto anonymous;
2128         }
2129         DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
2130                   "schannel.\n", domain->name ));
2131
2132         result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2133                                         SEC_RIGHTS_MAXIMUM_ALLOWED,
2134                                         &conn->lsa_policy);
2135         if (NT_STATUS_IS_OK(result)) {
2136                 goto done;
2137         }
2138
2139         DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
2140                   "anonymous\n"));
2141
2142         TALLOC_FREE(conn->lsa_pipe);
2143
2144  anonymous:
2145
2146         conn->lsa_pipe = cli_rpc_pipe_open_noauth(conn->cli, PI_LSARPC,
2147                                                   &result);
2148         if (conn->lsa_pipe == NULL) {
2149                 result = NT_STATUS_PIPE_NOT_AVAILABLE;
2150                 goto done;
2151         }
2152
2153         result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2154                                         SEC_RIGHTS_MAXIMUM_ALLOWED,
2155                                         &conn->lsa_policy);
2156  done:
2157         if (!NT_STATUS_IS_OK(result)) {
2158                 invalidate_cm_connection(conn);
2159                 return result;
2160         }
2161
2162         *cli = conn->lsa_pipe;
2163         *lsa_policy = conn->lsa_policy;
2164         return result;
2165 }
2166
2167 /****************************************************************************
2168  Open the netlogon pipe to this DC. Use schannel if specified in client conf.
2169  session key stored in conn->netlogon_pipe->dc->sess_key.
2170 ****************************************************************************/
2171
2172 NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
2173                              struct rpc_pipe_client **cli)
2174 {
2175         struct winbindd_cm_conn *conn;
2176         NTSTATUS result;
2177
2178         uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
2179         uint8  mach_pwd[16];
2180         uint32  sec_chan_type;
2181         const char *account_name;
2182         struct rpc_pipe_client *netlogon_pipe = NULL;
2183
2184         *cli = NULL;
2185
2186         result = init_dc_connection(domain);
2187         if (!NT_STATUS_IS_OK(result)) {
2188                 return result;
2189         }
2190
2191         conn = &domain->conn;
2192
2193         if (conn->netlogon_pipe != NULL) {
2194                 *cli = conn->netlogon_pipe;
2195                 return NT_STATUS_OK;
2196         }
2197
2198         netlogon_pipe = cli_rpc_pipe_open_noauth(conn->cli, PI_NETLOGON,
2199                                                  &result);
2200         if (netlogon_pipe == NULL) {
2201                 return result;
2202         }
2203
2204         if ((!IS_DC) && (!domain->primary)) {
2205                 /* Clear the schannel request bit and drop down */
2206                 neg_flags &= ~NETLOGON_NEG_SCHANNEL;
2207                 goto no_schannel;
2208         }
2209
2210         if (lp_client_schannel() != False) {
2211                 neg_flags |= NETLOGON_NEG_SCHANNEL;
2212         }
2213
2214         if (!get_trust_pw_hash(domain->name, mach_pwd, &account_name,
2215                                &sec_chan_type))
2216         {
2217                 TALLOC_FREE(netlogon_pipe);
2218                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
2219         }
2220
2221         result = rpccli_netlogon_setup_creds(
2222                  netlogon_pipe,
2223                  domain->dcname, /* server name. */
2224                  domain->name,   /* domain name */
2225                  global_myname(), /* client name */
2226                  account_name,   /* machine account */
2227                  mach_pwd,       /* machine password */
2228                  sec_chan_type,  /* from get_trust_pw */
2229                  &neg_flags);
2230
2231         if (!NT_STATUS_IS_OK(result)) {
2232                 TALLOC_FREE(netlogon_pipe);
2233                 return result;
2234         }
2235
2236         if ((lp_client_schannel() == True) &&
2237                         ((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
2238                 DEBUG(3, ("Server did not offer schannel\n"));
2239                 TALLOC_FREE(netlogon_pipe);
2240                 return NT_STATUS_ACCESS_DENIED;
2241         }
2242
2243  no_schannel:
2244         if ((lp_client_schannel() == False) ||
2245                         ((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
2246                 /*
2247                  * NetSamLogonEx only works for schannel
2248                  */
2249                 domain->can_do_samlogon_ex = False;
2250
2251                 /* We're done - just keep the existing connection to NETLOGON
2252                  * open */
2253                 conn->netlogon_pipe = netlogon_pipe;
2254                 *cli = conn->netlogon_pipe;
2255                 return NT_STATUS_OK;
2256         }
2257
2258         /* Using the credentials from the first pipe, open a signed and sealed
2259            second netlogon pipe. The session key is stored in the schannel
2260            part of the new pipe auth struct.
2261         */
2262
2263         conn->netlogon_pipe =
2264                 cli_rpc_pipe_open_schannel_with_key(conn->cli,
2265                                                     PI_NETLOGON,
2266                                                     PIPE_AUTH_LEVEL_PRIVACY,
2267                                                     domain->name,
2268                                                     netlogon_pipe->dc,
2269                                                     &result);
2270
2271         /* We can now close the initial netlogon pipe. */
2272         TALLOC_FREE(netlogon_pipe);
2273
2274         if (conn->netlogon_pipe == NULL) {
2275                 DEBUG(3, ("Could not open schannel'ed NETLOGON pipe. Error "
2276                           "was %s\n", nt_errstr(result)));
2277
2278                 /* make sure we return something besides OK */
2279                 return !NT_STATUS_IS_OK(result) ? result : NT_STATUS_PIPE_NOT_AVAILABLE;
2280         }
2281
2282         /*
2283          * Try NetSamLogonEx for AD domains
2284          */
2285         domain->can_do_samlogon_ex = domain->active_directory;
2286
2287         *cli = conn->netlogon_pipe;
2288         return NT_STATUS_OK;
2289 }