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 #include "../libcli/auth/libcli_auth.h"
  64 #include "../librpc/gen_ndr/ndr_netlogon_c.h"
  65 #include "rpc_client/cli_pipe.h"
  66 #include "rpc_client/cli_netlogon.h"
  67 #include "../librpc/gen_ndr/ndr_samr_c.h"
  68 #include "../librpc/gen_ndr/ndr_lsa_c.h"
  69 #include "rpc_client/cli_lsarpc.h"
  70 #include "../librpc/gen_ndr/ndr_dssetup_c.h"
  71 #include "libads/sitename_cache.h"
  72 #include "libsmb/libsmb.h"
  73 #include "libsmb/clidgram.h"
  74 #include "ads.h"
  75 #include "secrets.h"
  76 #include "../libcli/security/security.h"
  77 #include "passdb.h"
  78 #include "messages.h"
  79
  80 #undef DBGC_CLASS
  81 #define DBGC_CLASS DBGC_WINBIND
  82
  83 struct dc_name_ip {
  84         fstring name;
  85         struct sockaddr_storage ss;
  86 };
  87
  88 extern struct winbindd_methods reconnect_methods;
  89 extern bool override_logfile;
  90
  91 static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain);
  92 static void set_dc_type_and_flags( struct winbindd_domain *domain );
  93 static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
  94                     struct dc_name_ip **dcs, int *num_dcs);
  95
  96 /****************************************************************
  97  Child failed to find DC's. Reschedule check.
  98 ****************************************************************/
  99
 100 static void msg_failed_to_go_online(struct messaging_context *msg,
 101                                     void *private_data,
 102                                     uint32_t msg_type,
 103                                     struct server_id server_id,
 104                                     DATA_BLOB *data)
 105 {
 106         struct winbindd_domain *domain;
 107         const char *domainname = (const char *)data->data;
 108
 109         if (data->data == NULL || data->length == 0) {
 110                 return;
 111         }
 112
 113         DEBUG(5,("msg_fail_to_go_online: received for domain %s.\n", domainname));
 114
 115         for (domain = domain_list(); domain; domain = domain->next) {
 116                 if (domain->internal) {
 117                         continue;
 118                 }
 119
 120                 if (strequal(domain->name, domainname)) {
 121                         if (domain->online) {
 122                                 /* We're already online, ignore. */
 123                                 DEBUG(5,("msg_fail_to_go_online: domain %s "
 124                                         "already online.\n", domainname));
 125                                 continue;
 126                         }
 127
 128                         /* Reschedule the online check. */
 129                         set_domain_offline(domain);
 130                         break;
 131                 }
 132         }
 133 }
 134
 135 /****************************************************************
 136  Actually cause a reconnect from a message.
 137 ****************************************************************/
 138
 139 static void msg_try_to_go_online(struct messaging_context *msg,
 140                                  void *private_data,
 141                                  uint32_t msg_type,
 142                                  struct server_id server_id,
 143                                  DATA_BLOB *data)
 144 {
 145         struct winbindd_domain *domain;
 146         const char *domainname = (const char *)data->data;
 147
 148         if (data->data == NULL || data->length == 0) {
 149                 return;
 150         }
 151
 152         DEBUG(5,("msg_try_to_go_online: received for domain %s.\n", domainname));
 153
 154         for (domain = domain_list(); domain; domain = domain->next) {
 155                 if (domain->internal) {
 156                         continue;
 157                 }
 158
 159                 if (strequal(domain->name, domainname)) {
 160
 161                         if (domain->online) {
 162                                 /* We're already online, ignore. */
 163                                 DEBUG(5,("msg_try_to_go_online: domain %s "
 164                                         "already online.\n", domainname));
 165                                 continue;
 166                         }
 167
 168                         /* This call takes care of setting the online
 169                            flag to true if we connected, or re-adding
 170                            the offline handler if false. Bypasses online
 171                            check so always does network calls. */
 172
 173                         init_dc_connection_network(domain);
 174                         break;
 175                 }
 176         }
 177 }
 178
 179 /****************************************************************
 180  Fork a child to try and contact a DC. Do this as contacting a
 181  DC requires blocking lookups and we don't want to block our
 182  parent.
 183 ****************************************************************/
 184
 185 static bool fork_child_dc_connect(struct winbindd_domain *domain)
 186 {
 187         struct dc_name_ip *dcs = NULL;
 188         int num_dcs = 0;
 189         TALLOC_CTX *mem_ctx = NULL;
 190         pid_t parent_pid = sys_getpid();
 191         char *lfile = NULL;
 192         NTSTATUS status;
 193
 194         if (domain->dc_probe_pid != (pid_t)-1) {
 195                 /*
 196                  * We might already have a DC probe
 197                  * child working, check.
 198                  */
 199                 if (process_exists_by_pid(domain->dc_probe_pid)) {
 200                         DEBUG(10,("fork_child_dc_connect: pid %u already "
 201                                 "checking for DC's.\n",
 202                                 (unsigned int)domain->dc_probe_pid));
 203                         return true;
 204                 }
 205                 domain->dc_probe_pid = (pid_t)-1;
 206         }
 207
 208         domain->dc_probe_pid = sys_fork();
 209
 210         if (domain->dc_probe_pid == (pid_t)-1) {
 211                 DEBUG(0, ("fork_child_dc_connect: Could not fork: %s\n", strerror(errno)));
 212                 return False;
 213         }
 214
 215         if (domain->dc_probe_pid != (pid_t)0) {
 216                 /* Parent */
 217                 messaging_register(winbind_messaging_context(), NULL,
 218                                    MSG_WINBIND_TRY_TO_GO_ONLINE,
 219                                    msg_try_to_go_online);
 220                 messaging_register(winbind_messaging_context(), NULL,
 221                                    MSG_WINBIND_FAILED_TO_GO_ONLINE,
 222                                    msg_failed_to_go_online);
 223                 return True;
 224         }
 225
 226         /* Child. */
 227
 228         /* Leave messages blocked - we will never process one. */
 229
 230         if (!override_logfile) {
 231                 if (asprintf(&lfile, "%s/log.winbindd-dc-connect", get_dyn_LOGFILEBASE()) == -1) {
 232                         DEBUG(0, ("fork_child_dc_connect: out of memory.\n"));
 233                         _exit(1);
 234                 }
 235         }
 236
 237         status = winbindd_reinit_after_fork(NULL, lfile);
 238         if (!NT_STATUS_IS_OK(status)) {
 239                 DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
 240                           nt_errstr(status)));
 241                 messaging_send_buf(winbind_messaging_context(),
 242                                    pid_to_procid(parent_pid),
 243                                    MSG_WINBIND_FAILED_TO_GO_ONLINE,
 244                                    (uint8 *)domain->name,
 245                                    strlen(domain->name)+1);
 246                 _exit(1);
 247         }
 248         SAFE_FREE(lfile);
 249
 250         mem_ctx = talloc_init("fork_child_dc_connect");
 251         if (!mem_ctx) {
 252                 DEBUG(0,("talloc_init failed.\n"));
 253                 messaging_send_buf(winbind_messaging_context(),
 254                                    pid_to_procid(parent_pid),
 255                                    MSG_WINBIND_FAILED_TO_GO_ONLINE,
 256                                    (uint8 *)domain->name,
 257                                    strlen(domain->name)+1);
 258                 _exit(1);
 259         }
 260
 261         if ((!get_dcs(mem_ctx, domain, &dcs, &num_dcs)) || (num_dcs == 0)) {
 262                 /* Still offline ? Can't find DC's. */
 263                 messaging_send_buf(winbind_messaging_context(),
 264                                    pid_to_procid(parent_pid),
 265                                    MSG_WINBIND_FAILED_TO_GO_ONLINE,
 266                                    (uint8 *)domain->name,
 267                                    strlen(domain->name)+1);
 268                 _exit(0);
 269         }
 270
 271         /* We got a DC. Send a message to our parent to get it to
 272            try and do the same. */
 273
 274         messaging_send_buf(winbind_messaging_context(),
 275                            pid_to_procid(parent_pid),
 276                            MSG_WINBIND_TRY_TO_GO_ONLINE,
 277                            (uint8 *)domain->name,
 278                            strlen(domain->name)+1);
 279         _exit(0);
 280 }
 281
 282 /****************************************************************
 283  Handler triggered if we're offline to try and detect a DC.
 284 ****************************************************************/
 285
 286 static void check_domain_online_handler(struct event_context *ctx,
 287                                         struct timed_event *te,
 288                                         struct timeval now,
 289                                         void *private_data)
 290 {
 291         struct winbindd_domain *domain =
 292                 (struct winbindd_domain *)private_data;
 293
 294         DEBUG(10,("check_domain_online_handler: called for domain "
 295                   "%s (online = %s)\n", domain->name,
 296                   domain->online ? "True" : "False" ));
 297
 298         TALLOC_FREE(domain->check_online_event);
 299
 300         /* Are we still in "startup" mode ? */
 301
 302         if (domain->startup && (time_mono(NULL) > domain->startup_time + 30)) {
 303                 /* No longer in "startup" mode. */
 304                 DEBUG(10,("check_domain_online_handler: domain %s no longer in 'startup' mode.\n",
 305                         domain->name ));
 306                 domain->startup = False;
 307         }
 308
 309         /* We've been told to stay offline, so stay
 310            that way. */
 311
 312         if (get_global_winbindd_state_offline()) {
 313                 DEBUG(10,("check_domain_online_handler: domain %s remaining globally offline\n",
 314                         domain->name ));
 315                 return;
 316         }
 317
 318         /* Fork a child to test if it can contact a DC.
 319            If it can then send ourselves a message to
 320            cause a reconnect. */
 321
 322         fork_child_dc_connect(domain);
 323 }
 324
 325 /****************************************************************
 326  If we're still offline setup the timeout check.
 327 ****************************************************************/
 328
 329 static void calc_new_online_timeout_check(struct winbindd_domain *domain)
 330 {
 331         int wbr = lp_winbind_reconnect_delay();
 332
 333         if (domain->startup) {
 334                 domain->check_online_timeout = 10;
 335         } else if (domain->check_online_timeout < wbr) {
 336                 domain->check_online_timeout = wbr;
 337         }
 338 }
 339
 340 /****************************************************************
 341  Set domain offline and also add handler to put us back online
 342  if we detect a DC.
 343 ****************************************************************/
 344
 345 void set_domain_offline(struct winbindd_domain *domain)
 346 {
 347         DEBUG(10,("set_domain_offline: called for domain %s\n",
 348                 domain->name ));
 349
 350         TALLOC_FREE(domain->check_online_event);
 351
 352         if (domain->internal) {
 353                 DEBUG(3,("set_domain_offline: domain %s is internal - logic error.\n",
 354                         domain->name ));
 355                 return;
 356         }
 357
 358         domain->online = False;
 359
 360         /* Offline domains are always initialized. They're
 361            re-initialized when they go back online. */
 362
 363         domain->initialized = True;
 364
 365         /* We only add the timeout handler that checks and
 366            allows us to go back online when we've not
 367            been told to remain offline. */
 368
 369         if (get_global_winbindd_state_offline()) {
 370                 DEBUG(10,("set_domain_offline: domain %s remaining globally offline\n",
 371                         domain->name ));
 372                 return;
 373         }
 374
 375         /* If we're in startup mode, check again in 10 seconds, not in
 376            lp_winbind_reconnect_delay() seconds (which is 30 seconds by default). */
 377
 378         calc_new_online_timeout_check(domain);
 379
 380         domain->check_online_event = event_add_timed(winbind_event_context(),
 381                                                 NULL,
 382                                                 timeval_current_ofs(domain->check_online_timeout,0),
 383                                                 check_domain_online_handler,
 384                                                 domain);
 385
 386         /* The above *has* to succeed for winbindd to work. */
 387         if (!domain->check_online_event) {
 388                 smb_panic("set_domain_offline: failed to add online handler");
 389         }
 390
 391         DEBUG(10,("set_domain_offline: added event handler for domain %s\n",
 392                 domain->name ));
 393
 394         /* Send an offline message to the idmap child when our
 395            primary domain goes offline */
 396
 397         if ( domain->primary ) {
 398                 struct winbindd_child *idmap = idmap_child();
 399
 400                 if ( idmap->pid != 0 ) {
 401                         messaging_send_buf(winbind_messaging_context(),
 402                                            pid_to_procid(idmap->pid),
 403                                            MSG_WINBIND_OFFLINE,
 404                                            (uint8 *)domain->name,
 405                                            strlen(domain->name)+1);
 406                 }
 407         }
 408
 409         return;
 410 }
 411
 412 /****************************************************************
 413  Set domain online - if allowed.
 414 ****************************************************************/
 415
 416 static void set_domain_online(struct winbindd_domain *domain)
 417 {
 418         DEBUG(10,("set_domain_online: called for domain %s\n",
 419                 domain->name ));
 420
 421         if (domain->internal) {
 422                 DEBUG(3,("set_domain_online: domain %s is internal - logic error.\n",
 423                         domain->name ));
 424                 return;
 425         }
 426
 427         if (get_global_winbindd_state_offline()) {
 428                 DEBUG(10,("set_domain_online: domain %s remaining globally offline\n",
 429                         domain->name ));
 430                 return;
 431         }
 432
 433         winbindd_set_locator_kdc_envs(domain);
 434
 435         /* If we are waiting to get a krb5 ticket, trigger immediately. */
 436         ccache_regain_all_now();
 437
 438         /* Ok, we're out of any startup mode now... */
 439         domain->startup = False;
 440
 441         if (domain->online == False) {
 442                 /* We were offline - now we're online. We default to
 443                    using the MS-RPC backend if we started offline,
 444                    and if we're going online for the first time we
 445                    should really re-initialize the backends and the
 446                    checks to see if we're talking to an AD or NT domain.
 447                 */
 448
 449                 domain->initialized = False;
 450
 451                 /* 'reconnect_methods' is the MS-RPC backend. */
 452                 if (domain->backend == &reconnect_methods) {
 453                         domain->backend = NULL;
 454                 }
 455         }
 456
 457         /* Ensure we have no online timeout checks. */
 458         domain->check_online_timeout = 0;
 459         TALLOC_FREE(domain->check_online_event);
 460
 461         /* Ensure we ignore any pending child messages. */
 462         messaging_deregister(winbind_messaging_context(),
 463                              MSG_WINBIND_TRY_TO_GO_ONLINE, NULL);
 464         messaging_deregister(winbind_messaging_context(),
 465                              MSG_WINBIND_FAILED_TO_GO_ONLINE, NULL);
 466
 467         domain->online = True;
 468
 469         /* Send an online message to the idmap child when our
 470            primary domain comes online */
 471
 472         if ( domain->primary ) {
 473                 struct winbindd_child *idmap = idmap_child();
 474
 475                 if ( idmap->pid != 0 ) {
 476                         messaging_send_buf(winbind_messaging_context(),
 477                                            pid_to_procid(idmap->pid),
 478                                            MSG_WINBIND_ONLINE,
 479                                            (uint8 *)domain->name,
 480                                            strlen(domain->name)+1);
 481                 }
 482         }
 483
 484         return;
 485 }
 486
 487 /****************************************************************
 488  Requested to set a domain online.
 489 ****************************************************************/
 490
 491 void set_domain_online_request(struct winbindd_domain *domain)
 492 {
 493         struct timeval tev;
 494
 495         DEBUG(10,("set_domain_online_request: called for domain %s\n",
 496                 domain->name ));
 497
 498         if (get_global_winbindd_state_offline()) {
 499                 DEBUG(10,("set_domain_online_request: domain %s remaining globally offline\n",
 500                         domain->name ));
 501                 return;
 502         }
 503
 504         if (domain->internal) {
 505                 DEBUG(10, ("set_domain_online_request: Internal domains are "
 506                            "always online\n"));
 507                 return;
 508         }
 509
 510         /* We've been told it's safe to go online and
 511            try and connect to a DC. But I don't believe it
 512            because network manager seems to lie.
 513            Wait at least 5 seconds. Heuristics suck... */
 514
 515
 516         GetTimeOfDay(&tev);
 517
 518         /* Go into "startup" mode again. */
 519         domain->startup_time = time_mono(NULL);
 520         domain->startup = True;
 521
 522         tev.tv_sec += 5;
 523
 524         if (!domain->check_online_event) {
 525                 /* If we've come from being globally offline we
 526                    don't have a check online event handler set.
 527                    We need to add one now we're trying to go
 528                    back online. */
 529
 530                 DEBUG(10,("set_domain_online_request: domain %s was globally offline.\n",
 531                         domain->name ));
 532         }
 533
 534         TALLOC_FREE(domain->check_online_event);
 535
 536         domain->check_online_event = event_add_timed(winbind_event_context(),
 537                                                      NULL,
 538                                                      tev,
 539                                                      check_domain_online_handler,
 540                                                      domain);
 541
 542         /* The above *has* to succeed for winbindd to work. */
 543         if (!domain->check_online_event) {
 544                 smb_panic("set_domain_online_request: failed to add online handler");
 545         }
 546 }
 547
 548 /****************************************************************
 549  Add -ve connection cache entries for domain and realm.
 550 ****************************************************************/
 551
 552 static void winbind_add_failed_connection_entry(
 553         const struct winbindd_domain *domain,
 554         const char *server,
 555         NTSTATUS result)
 556 {
 557         add_failed_connection_entry(domain->name, server, result);
 558         /* If this was the saf name for the last thing we talked to,
 559            remove it. */
 560         saf_delete(domain->name);
 561         if (*domain->alt_name) {
 562                 add_failed_connection_entry(domain->alt_name, server, result);
 563                 saf_delete(domain->alt_name);
 564         }
 565         winbindd_unset_locator_kdc_env(domain);
 566 }
 567
 568 /* Choose between anonymous or authenticated connections.  We need to use
 569    an authenticated connection if DCs have the RestrictAnonymous registry
 570    entry set > 0, or the "Additional restrictions for anonymous
 571    connections" set in the win2k Local Security Policy.
 572
 573    Caller to free() result in domain, username, password
 574 */
 575
 576 static void cm_get_ipc_userpass(char **username, char **domain, char **password)
 577 {
 578         *username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
 579         *domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
 580         *password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
 581
 582         if (*username && **username) {
 583
 584                 if (!*domain || !**domain)
 585                         *domain = smb_xstrdup(lp_workgroup());
 586
 587                 if (!*password || !**password)
 588                         *password = smb_xstrdup("");
 589
 590                 DEBUG(3, ("cm_get_ipc_userpass: Retrieved auth-user from secrets.tdb [%s\\%s]\n",
 591                           *domain, *username));
 592
 593         } else {
 594                 DEBUG(3, ("cm_get_ipc_userpass: No auth-user defined\n"));
 595                 *username = smb_xstrdup("");
 596                 *domain = smb_xstrdup("");
 597                 *password = smb_xstrdup("");
 598         }
 599 }
 600
 601 static bool get_dc_name_via_netlogon(struct winbindd_domain *domain,
 602                                      fstring dcname,
 603                                      struct sockaddr_storage *dc_ss)
 604 {
 605         struct winbindd_domain *our_domain = NULL;
 606         struct rpc_pipe_client *netlogon_pipe = NULL;
 607         NTSTATUS result;
 608         WERROR werr;
 609         TALLOC_CTX *mem_ctx;
 610         unsigned int orig_timeout;
 611         const char *tmp = NULL;
 612         const char *p;
 613         struct dcerpc_binding_handle *b;
 614
 615         /* Hmmmm. We can only open one connection to the NETLOGON pipe at the
 616          * moment.... */
 617
 618         if (IS_DC) {
 619                 return False;
 620         }
 621
 622         if (domain->primary) {
 623                 return False;
 624         }
 625
 626         our_domain = find_our_domain();
 627
 628         if ((mem_ctx = talloc_init("get_dc_name_via_netlogon")) == NULL) {
 629                 return False;
 630         }
 631
 632         result = cm_connect_netlogon(our_domain, &netlogon_pipe);
 633         if (!NT_STATUS_IS_OK(result)) {
 634                 talloc_destroy(mem_ctx);
 635                 return False;
 636         }
 637
 638         b = netlogon_pipe->binding_handle;
 639
 640         /* This call can take a long time - allow the server to time out.
 641            35 seconds should do it. */
 642
 643         orig_timeout = rpccli_set_timeout(netlogon_pipe, 35000);
 644
 645         if (our_domain->active_directory) {
 646                 struct netr_DsRGetDCNameInfo *domain_info = NULL;
 647
 648                 result = dcerpc_netr_DsRGetDCName(b,
 649                                                   mem_ctx,
 650                                                   our_domain->dcname,
 651                                                   domain->name,
 652                                                   NULL,
 653                                                   NULL,
 654                                                   DS_RETURN_DNS_NAME,
 655                                                   &domain_info,
 656                                                   &werr);
 657                 if (NT_STATUS_IS_OK(result) && W_ERROR_IS_OK(werr)) {
 658                         tmp = talloc_strdup(
 659                                 mem_ctx, domain_info->dc_unc);
 660                         if (tmp == NULL) {
 661                                 DEBUG(0, ("talloc_strdup failed\n"));
 662                                 talloc_destroy(mem_ctx);
 663                                 return false;
 664                         }
 665                         if (strlen(domain->alt_name) == 0) {
 666                                 fstrcpy(domain->alt_name,
 667                                         domain_info->domain_name);
 668                         }
 669                         if (strlen(domain->forest_name) == 0) {
 670                                 fstrcpy(domain->forest_name,
 671                                         domain_info->forest_name);
 672                         }
 673                 }
 674         } else {
 675                 result = dcerpc_netr_GetAnyDCName(b, mem_ctx,
 676                                                   our_domain->dcname,
 677                                                   domain->name,
 678                                                   &tmp,
 679                                                   &werr);
 680         }
 681
 682         /* And restore our original timeout. */
 683         rpccli_set_timeout(netlogon_pipe, orig_timeout);
 684
 685         if (!NT_STATUS_IS_OK(result)) {
 686                 DEBUG(10,("dcerpc_netr_GetAnyDCName failed: %s\n",
 687                         nt_errstr(result)));
 688                 talloc_destroy(mem_ctx);
 689                 return false;
 690         }
 691
 692         if (!W_ERROR_IS_OK(werr)) {
 693                 DEBUG(10,("dcerpc_netr_GetAnyDCName failed: %s\n",
 694                            win_errstr(werr)));
 695                 talloc_destroy(mem_ctx);
 696                 return false;
 697         }
 698
 699         /* dcerpc_netr_GetAnyDCName gives us a name with \\ */
 700         p = strip_hostname(tmp);
 701
 702         fstrcpy(dcname, p);
 703
 704         talloc_destroy(mem_ctx);
 705
 706         DEBUG(10,("dcerpc_netr_GetAnyDCName returned %s\n", dcname));
 707
 708         if (!resolve_name(dcname, dc_ss, 0x20, true)) {
 709                 return False;
 710         }
 711
 712         return True;
 713 }
 714
 715 /**
 716  * Helper function to assemble trust password and account name
 717  */
 718 static NTSTATUS get_trust_creds(const struct winbindd_domain *domain,
 719                                 char **machine_password,
 720                                 char **machine_account,
 721                                 char **machine_krb5_principal)
 722 {
 723         const char *account_name;
 724         const char *name = NULL;
 725
 726         /* If we are a DC and this is not our own domain */
 727
 728         if (IS_DC) {
 729                 name = domain->name;
 730         } else {
 731                 struct winbindd_domain *our_domain = find_our_domain();
 732
 733                 if (!our_domain)
 734                         return NT_STATUS_INVALID_SERVER_STATE;
 735
 736                 name = our_domain->name;
 737         }
 738
 739         if (!get_trust_pw_clear(name, machine_password,
 740                                 &account_name, NULL))
 741         {
 742                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 743         }
 744
 745         if ((machine_account != NULL) &&
 746             (asprintf(machine_account, "%s$", account_name) == -1))
 747         {
 748                 return NT_STATUS_NO_MEMORY;
 749         }
 750
 751         /* For now assume our machine account only exists in our domain */
 752
 753         if (machine_krb5_principal != NULL)
 754         {
 755                 struct winbindd_domain *our_domain = find_our_domain();
 756
 757                 if (!our_domain) {
 758                         return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 759                 }
 760
 761                 if (asprintf(machine_krb5_principal, "%s$@%s",
 762                              account_name, our_domain->alt_name) == -1)
 763                 {
 764                         return NT_STATUS_NO_MEMORY;
 765                 }
 766
 767                 strupper_m(*machine_krb5_principal);
 768         }
 769
 770         return NT_STATUS_OK;
 771 }
 772
 773 /************************************************************************
 774  Given a fd with a just-connected TCP connection to a DC, open a connection
 775  to the pipe.
 776 ************************************************************************/
 777
 778 static NTSTATUS cm_prepare_connection(const struct winbindd_domain *domain,
 779                                       const int sockfd,
 780                                       const char *controller,
 781                                       struct cli_state **cli,
 782                                       bool *retry)
 783 {
 784         char *machine_password = NULL;
 785         char *machine_krb5_principal = NULL;
 786         char *machine_account = NULL;
 787         char *ipc_username = NULL;
 788         char *ipc_domain = NULL;
 789         char *ipc_password = NULL;
 790
 791         struct named_mutex *mutex;
 792
 793         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
 794
 795         struct sockaddr peeraddr;
 796         socklen_t peeraddr_len;
 797
 798         struct sockaddr_in *peeraddr_in =
 799                 (struct sockaddr_in *)(void *)&peeraddr;
 800
 801         DEBUG(10,("cm_prepare_connection: connecting to DC %s for domain %s\n",
 802                 controller, domain->name ));
 803
 804         *retry = True;
 805
 806         mutex = grab_named_mutex(talloc_tos(), controller,
 807                                  WINBIND_SERVER_MUTEX_WAIT_TIME);
 808         if (mutex == NULL) {
 809                 DEBUG(0,("cm_prepare_connection: mutex grab failed for %s\n",
 810                          controller));
 811                 result = NT_STATUS_POSSIBLE_DEADLOCK;
 812                 goto done;
 813         }
 814
 815         if ((*cli = cli_initialise()) == NULL) {
 816                 DEBUG(1, ("Could not cli_initialize\n"));
 817                 result = NT_STATUS_NO_MEMORY;
 818                 goto done;
 819         }
 820
 821         (*cli)->timeout = 10000;        /* 10 seconds */
 822         (*cli)->fd = sockfd;
 823         (*cli)->desthost = talloc_strdup((*cli), controller);
 824         if ((*cli)->desthost == NULL) {
 825                 result = NT_STATUS_NO_MEMORY;
 826                 goto done;
 827         }
 828
 829         (*cli)->use_kerberos = True;
 830
 831         peeraddr_len = sizeof(peeraddr);
 832
 833         if ((getpeername((*cli)->fd, &peeraddr, &peeraddr_len) != 0)) {
 834                 DEBUG(0,("cm_prepare_connection: getpeername failed with: %s\n",
 835                         strerror(errno)));
 836                 result = NT_STATUS_UNSUCCESSFUL;
 837                 goto done;
 838         }
 839
 840         if ((peeraddr_len != sizeof(struct sockaddr_in))
 841 #ifdef HAVE_IPV6
 842             && (peeraddr_len != sizeof(struct sockaddr_in6))
 843 #endif
 844             ) {
 845                 DEBUG(0,("cm_prepare_connection: got unexpected peeraddr len %d\n",
 846                         peeraddr_len));
 847                 result = NT_STATUS_UNSUCCESSFUL;
 848                 goto done;
 849         }
 850
 851         if ((peeraddr_in->sin_family != PF_INET)
 852 #ifdef HAVE_IPV6
 853             && (peeraddr_in->sin_family != PF_INET6)
 854 #endif
 855             ) {
 856                 DEBUG(0,("cm_prepare_connection: got unexpected family %d\n",
 857                         peeraddr_in->sin_family));
 858                 result = NT_STATUS_UNSUCCESSFUL;
 859                 goto done;
 860         }
 861
 862         result = cli_negprot(*cli);
 863
 864         if (!NT_STATUS_IS_OK(result)) {
 865                 DEBUG(1, ("cli_negprot failed: %s\n", nt_errstr(result)));
 866                 goto done;
 867         }
 868
 869         if (!is_dc_trusted_domain_situation(domain->name) &&
 870             (*cli)->protocol >= PROTOCOL_NT1 &&
 871             (*cli)->capabilities & CAP_EXTENDED_SECURITY)
 872         {
 873                 ADS_STATUS ads_status;
 874
 875                 result = get_trust_creds(domain, &machine_password,
 876                                          &machine_account,
 877                                          &machine_krb5_principal);
 878                 if (!NT_STATUS_IS_OK(result)) {
 879                         goto anon_fallback;
 880                 }
 881
 882                 if (lp_security() == SEC_ADS) {
 883
 884                         /* Try a krb5 session */
 885
 886                         (*cli)->use_kerberos = True;
 887                         DEBUG(5, ("connecting to %s from %s with kerberos principal "
 888                                   "[%s] and realm [%s]\n", controller, lp_netbios_name(),
 889                                   machine_krb5_principal, domain->alt_name));
 890
 891                         winbindd_set_locator_kdc_envs(domain);
 892
 893                         ads_status = cli_session_setup_spnego(*cli,
 894                                                               machine_krb5_principal,
 895                                                               machine_password,
 896                                                               lp_workgroup(),
 897                                                               domain->alt_name);
 898
 899                         if (!ADS_ERR_OK(ads_status)) {
 900                                 DEBUG(4,("failed kerberos session setup with %s\n",
 901                                          ads_errstr(ads_status)));
 902                         }
 903
 904                         result = ads_ntstatus(ads_status);
 905                         if (NT_STATUS_IS_OK(result)) {
 906                                 /* Ensure creds are stored for NTLMSSP authenticated pipe access. */
 907                                 result = cli_init_creds(*cli, machine_account, lp_workgroup(), machine_password);
 908                                 if (!NT_STATUS_IS_OK(result)) {
 909                                         goto done;
 910                                 }
 911                                 goto session_setup_done;
 912                         }
 913                 }
 914
 915                 /* Fall back to non-kerberos session setup using NTLMSSP SPNEGO with the machine account. */
 916                 (*cli)->use_kerberos = False;
 917
 918                 DEBUG(5, ("connecting to %s from %s with username "
 919                           "[%s]\\[%s]\n",  controller, lp_netbios_name(),
 920                           lp_workgroup(), machine_account));
 921
 922                 ads_status = cli_session_setup_spnego(*cli,
 923                                                       machine_account,
 924                                                       machine_password,
 925                                                       lp_workgroup(),
 926                                                       NULL);
 927                 if (!ADS_ERR_OK(ads_status)) {
 928                         DEBUG(4, ("authenticated session setup failed with %s\n",
 929                                 ads_errstr(ads_status)));
 930                 }
 931
 932                 result = ads_ntstatus(ads_status);
 933                 if (NT_STATUS_IS_OK(result)) {
 934                         /* Ensure creds are stored for NTLMSSP authenticated pipe access. */
 935                         result = cli_init_creds(*cli, machine_account, lp_workgroup(), machine_password);
 936                         if (!NT_STATUS_IS_OK(result)) {
 937                                 goto done;
 938                         }
 939                         goto session_setup_done;
 940                 }
 941         }
 942
 943         /* Fall back to non-kerberos session setup with auth_user */
 944
 945         (*cli)->use_kerberos = False;
 946
 947         cm_get_ipc_userpass(&ipc_username, &ipc_domain, &ipc_password);
 948
 949         if ((((*cli)->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) != 0) &&
 950             (strlen(ipc_username) > 0)) {
 951
 952                 /* Only try authenticated if we have a username */
 953
 954                 DEBUG(5, ("connecting to %s from %s with username "
 955                           "[%s]\\[%s]\n",  controller, lp_netbios_name(),
 956                           ipc_domain, ipc_username));
 957
 958                 if (NT_STATUS_IS_OK(cli_session_setup(
 959                                             *cli, ipc_username,
 960                                             ipc_password, strlen(ipc_password)+1,
 961                                             ipc_password, strlen(ipc_password)+1,
 962                                             ipc_domain))) {
 963                         /* Successful logon with given username. */
 964                         result = cli_init_creds(*cli, ipc_username, ipc_domain, ipc_password);
 965                         if (!NT_STATUS_IS_OK(result)) {
 966                                 goto done;
 967                         }
 968                         goto session_setup_done;
 969                 } else {
 970                         DEBUG(4, ("authenticated session setup with user %s\\%s failed.\n",
 971                                 ipc_domain, ipc_username ));
 972                 }
 973         }
 974
 975  anon_fallback:
 976
 977         /* Fall back to anonymous connection, this might fail later */
 978         DEBUG(10,("cm_prepare_connection: falling back to anonymous "
 979                 "connection for DC %s\n",
 980                 controller ));
 981
 982         if (NT_STATUS_IS_OK(cli_session_setup(*cli, "", NULL, 0,
 983                                               NULL, 0, ""))) {
 984                 DEBUG(5, ("Connected anonymously\n"));
 985                 result = cli_init_creds(*cli, "", "", "");
 986                 if (!NT_STATUS_IS_OK(result)) {
 987                         goto done;
 988                 }
 989                 goto session_setup_done;
 990         }
 991
 992         result = cli_nt_error(*cli);
 993
 994         if (NT_STATUS_IS_OK(result))
 995                 result = NT_STATUS_UNSUCCESSFUL;
 996
 997         /* We can't session setup */
 998
 999         goto done;
1000
1001  session_setup_done:
1002
1003         /* cache the server name for later connections */
1004
1005         saf_store( domain->name, (*cli)->desthost );
1006         if (domain->alt_name && (*cli)->use_kerberos) {
1007                 saf_store( domain->alt_name, (*cli)->desthost );
1008         }
1009
1010         winbindd_set_locator_kdc_envs(domain);
1011
1012         result = cli_tcon_andx(*cli, "IPC$", "IPC", "", 0);
1013
1014         if (!NT_STATUS_IS_OK(result)) {
1015                 DEBUG(1,("failed tcon_X with %s\n", nt_errstr(result)));
1016                 goto done;
1017         }
1018
1019         TALLOC_FREE(mutex);
1020         *retry = False;
1021
1022         /* set the domain if empty; needed for schannel connections */
1023         if ( !(*cli)->domain[0] ) {
1024                 result = cli_set_domain((*cli), domain->name);
1025                 if (!NT_STATUS_IS_OK(result)) {
1026                         return result;
1027                 }
1028         }
1029
1030         result = NT_STATUS_OK;
1031
1032  done:
1033         TALLOC_FREE(mutex);
1034         SAFE_FREE(machine_account);
1035         SAFE_FREE(machine_password);
1036         SAFE_FREE(machine_krb5_principal);
1037         SAFE_FREE(ipc_username);
1038         SAFE_FREE(ipc_domain);
1039         SAFE_FREE(ipc_password);
1040
1041         if (!NT_STATUS_IS_OK(result)) {
1042                 winbind_add_failed_connection_entry(domain, controller, result);
1043                 if ((*cli) != NULL) {
1044                         cli_shutdown(*cli);
1045                         *cli = NULL;
1046                 }
1047         }
1048
1049         return result;
1050 }
1051
1052 /*******************************************************************
1053  Add a dcname and sockaddr_storage pair to the end of a dc_name_ip
1054  array.
1055
1056  Keeps the list unique by not adding duplicate entries.
1057
1058  @param[in] mem_ctx talloc memory context to allocate from
1059  @param[in] domain_name domain of the DC
1060  @param[in] dcname name of the DC to add to the list
1061  @param[in] pss Internet address and port pair to add to the list
1062  @param[in,out] dcs array of dc_name_ip structures to add to
1063  @param[in,out] num_dcs number of dcs returned in the dcs array
1064  @return true if the list was added to, false otherwise
1065 *******************************************************************/
1066
1067 static bool add_one_dc_unique(TALLOC_CTX *mem_ctx, const char *domain_name,
1068                               const char *dcname, struct sockaddr_storage *pss,
1069                               struct dc_name_ip **dcs, int *num)
1070 {
1071         int i = 0;
1072
1073         if (!NT_STATUS_IS_OK(check_negative_conn_cache(domain_name, dcname))) {
1074                 DEBUG(10, ("DC %s was in the negative conn cache\n", dcname));
1075                 return False;
1076         }
1077
1078         /* Make sure there's no duplicates in the list */
1079         for (i=0; i<*num; i++)
1080                 if (sockaddr_equal(
1081                             (struct sockaddr *)(void *)&(*dcs)[i].ss,
1082                             (struct sockaddr *)(void *)pss))
1083                         return False;
1084
1085         *dcs = talloc_realloc(mem_ctx, *dcs, struct dc_name_ip, (*num)+1);
1086
1087         if (*dcs == NULL)
1088                 return False;
1089
1090         fstrcpy((*dcs)[*num].name, dcname);
1091         (*dcs)[*num].ss = *pss;
1092         *num += 1;
1093         return True;
1094 }
1095
1096 static bool add_sockaddr_to_array(TALLOC_CTX *mem_ctx,
1097                                   struct sockaddr_storage *pss, uint16 port,
1098                                   struct sockaddr_storage **addrs, int *num)
1099 {
1100         *addrs = talloc_realloc(mem_ctx, *addrs, struct sockaddr_storage, (*num)+1);
1101
1102         if (*addrs == NULL) {
1103                 *num = 0;
1104                 return False;
1105         }
1106
1107         (*addrs)[*num] = *pss;
1108         set_sockaddr_port((struct sockaddr *)&(*addrs)[*num], port);
1109
1110         *num += 1;
1111         return True;
1112 }
1113
1114 /*******************************************************************
1115  convert an ip to a name
1116 *******************************************************************/
1117
1118 static bool dcip_to_name(TALLOC_CTX *mem_ctx,
1119                 const struct winbindd_domain *domain,
1120                 struct sockaddr_storage *pss,
1121                 fstring name )
1122 {
1123         struct ip_service ip_list;
1124         uint32_t nt_version = NETLOGON_NT_VERSION_1;
1125         NTSTATUS status;
1126         const char *dc_name;
1127
1128         ip_list.ss = *pss;
1129         ip_list.port = 0;
1130
1131 #ifdef HAVE_ADS
1132         /* For active directory servers, try to get the ldap server name.
1133            None of these failures should be considered critical for now */
1134
1135         if (lp_security() == SEC_ADS) {
1136                 ADS_STRUCT *ads;
1137                 ADS_STATUS ads_status;
1138                 char addr[INET6_ADDRSTRLEN];
1139
1140                 print_sockaddr(addr, sizeof(addr), pss);
1141
1142                 ads = ads_init(domain->alt_name, domain->name, addr);
1143                 ads->auth.flags |= ADS_AUTH_NO_BIND;
1144
1145                 ads_status = ads_connect(ads);
1146                 if (ADS_ERR_OK(ads_status)) {
1147                         /* We got a cldap packet. */
1148                         fstrcpy(name, ads->config.ldap_server_name);
1149                         namecache_store(name, 0x20, 1, &ip_list);
1150
1151                         DEBUG(10,("dcip_to_name: flags = 0x%x\n", (unsigned int)ads->config.flags));
1152
1153                         if (domain->primary && (ads->config.flags & NBT_SERVER_KDC)) {
1154                                 if (ads_closest_dc(ads)) {
1155                                         char *sitename = sitename_fetch(ads->config.realm);
1156
1157                                         /* We're going to use this KDC for this realm/domain.
1158                                            If we are using sites, then force the krb5 libs
1159                                            to use this KDC. */
1160
1161                                         create_local_private_krb5_conf_for_domain(domain->alt_name,
1162                                                                         domain->name,
1163                                                                         sitename,
1164                                                                         pss,
1165                                                                         name);
1166
1167                                         SAFE_FREE(sitename);
1168                                 } else {
1169                                         /* use an off site KDC */
1170                                         create_local_private_krb5_conf_for_domain(domain->alt_name,
1171                                                                         domain->name,
1172                                                                         NULL,
1173                                                                         pss,
1174                                                                         name);
1175                                 }
1176                                 winbindd_set_locator_kdc_envs(domain);
1177
1178                                 /* Ensure we contact this DC also. */
1179                                 saf_store( domain->name, name);
1180                                 saf_store( domain->alt_name, name);
1181                         }
1182
1183                         ads_destroy( &ads );
1184                         return True;
1185                 }
1186
1187                 ads_destroy( &ads );
1188         }
1189 #endif
1190
1191         status = nbt_getdc(winbind_messaging_context(), pss, domain->name,
1192                            &domain->sid, nt_version, mem_ctx, &nt_version,
1193                            &dc_name, NULL);
1194         if (NT_STATUS_IS_OK(status)) {
1195                 fstrcpy(name, dc_name);
1196                 namecache_store(name, 0x20, 1, &ip_list);
1197                 return True;
1198         }
1199
1200         /* try node status request */
1201
1202         if ( name_status_find(domain->name, 0x1c, 0x20, pss, name) ) {
1203                 namecache_store(name, 0x20, 1, &ip_list);
1204                 return True;
1205         }
1206         return False;
1207 }
1208
1209 /*******************************************************************
1210  Retrieve a list of IP addresses for domain controllers.
1211
1212  The array is sorted in the preferred connection order.
1213
1214  @param[in] mem_ctx talloc memory context to allocate from
1215  @param[in] domain domain to retrieve DCs for
1216  @param[out] dcs array of dcs that will be returned
1217  @param[out] num_dcs number of dcs returned in the dcs array
1218  @return always true
1219 *******************************************************************/
1220
1221 static bool get_dcs(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
1222                     struct dc_name_ip **dcs, int *num_dcs)
1223 {
1224         fstring dcname;
1225         struct  sockaddr_storage ss;
1226         struct  ip_service *ip_list = NULL;
1227         int     iplist_size = 0;
1228         int     i;
1229         bool    is_our_domain;
1230         enum security_types sec = (enum security_types)lp_security();
1231
1232         is_our_domain = strequal(domain->name, lp_workgroup());
1233
1234         /* If not our domain, get the preferred DC, by asking our primary DC */
1235         if ( !is_our_domain
1236                 && get_dc_name_via_netlogon(domain, dcname, &ss)
1237                 && add_one_dc_unique(mem_ctx, domain->name, dcname, &ss, dcs,
1238                        num_dcs) )
1239         {
1240                 char addr[INET6_ADDRSTRLEN];
1241                 print_sockaddr(addr, sizeof(addr), &ss);
1242                 DEBUG(10, ("Retrieved DC %s at %s via netlogon\n",
1243                            dcname, addr));
1244                 return True;
1245         }
1246
1247         if (sec == SEC_ADS) {
1248                 char *sitename = NULL;
1249
1250                 /* We need to make sure we know the local site before
1251                    doing any DNS queries, as this will restrict the
1252                    get_sorted_dc_list() call below to only fetching
1253                    DNS records for the correct site. */
1254
1255                 /* Find any DC to get the site record.
1256                    We deliberately don't care about the
1257                    return here. */
1258
1259                 get_dc_name(domain->name, domain->alt_name, dcname, &ss);
1260
1261                 sitename = sitename_fetch(domain->alt_name);
1262                 if (sitename) {
1263
1264                         /* Do the site-specific AD dns lookup first. */
1265                         get_sorted_dc_list(domain->alt_name, sitename, &ip_list,
1266                                &iplist_size, True);
1267
1268                         /* Add ips to the DC array.  We don't look up the name
1269                            of the DC in this function, but we fill in the char*
1270                            of the ip now to make the failed connection cache
1271                            work */
1272                         for ( i=0; i<iplist_size; i++ ) {
1273                                 char addr[INET6_ADDRSTRLEN];
1274                                 print_sockaddr(addr, sizeof(addr),
1275                                                 &ip_list[i].ss);
1276                                 add_one_dc_unique(mem_ctx,
1277                                                 domain->name,
1278                                                 addr,
1279                                                 &ip_list[i].ss,
1280                                                 dcs,
1281                                                 num_dcs);
1282                         }
1283
1284                         SAFE_FREE(ip_list);
1285                         SAFE_FREE(sitename);
1286                         iplist_size = 0;
1287                 }
1288
1289                 /* Now we add DCs from the main AD DNS lookup. */
1290                 get_sorted_dc_list(domain->alt_name, NULL, &ip_list,
1291                         &iplist_size, True);
1292
1293                 for ( i=0; i<iplist_size; i++ ) {
1294                         char addr[INET6_ADDRSTRLEN];
1295                         print_sockaddr(addr, sizeof(addr),
1296                                         &ip_list[i].ss);
1297                         add_one_dc_unique(mem_ctx,
1298                                         domain->name,
1299                                         addr,
1300                                         &ip_list[i].ss,
1301                                         dcs,
1302                                         num_dcs);
1303                 }
1304
1305                 SAFE_FREE(ip_list);
1306                 iplist_size = 0;
1307         }
1308
1309         /* Try standard netbios queries if no ADS */
1310         if (*num_dcs == 0) {
1311                 get_sorted_dc_list(domain->name, NULL, &ip_list, &iplist_size,
1312                        False);
1313
1314                 for ( i=0; i<iplist_size; i++ ) {
1315                         char addr[INET6_ADDRSTRLEN];
1316                         print_sockaddr(addr, sizeof(addr),
1317                                         &ip_list[i].ss);
1318                         add_one_dc_unique(mem_ctx,
1319                                         domain->name,
1320                                         addr,
1321                                         &ip_list[i].ss,
1322                                         dcs,
1323                                         num_dcs);
1324                 }
1325
1326                 SAFE_FREE(ip_list);
1327                 iplist_size = 0;
1328         }
1329
1330         return True;
1331 }
1332
1333 /*******************************************************************
1334  Find and make a connection to a DC in the given domain.
1335
1336  @param[in] mem_ctx talloc memory context to allocate from
1337  @param[in] domain domain to find a dc in
1338  @param[out] dcname NetBIOS or FQDN of DC that's connected to
1339  @param[out] pss DC Internet address and port
1340  @param[out] fd fd of the open socket connected to the newly found dc
1341  @return true when a DC connection is made, false otherwise
1342 *******************************************************************/
1343
1344 static bool find_new_dc(TALLOC_CTX *mem_ctx,
1345                         struct winbindd_domain *domain,
1346                         fstring dcname, struct sockaddr_storage *pss, int *fd)
1347 {
1348         struct dc_name_ip *dcs = NULL;
1349         int num_dcs = 0;
1350
1351         const char **dcnames = NULL;
1352         int num_dcnames = 0;
1353
1354         struct sockaddr_storage *addrs = NULL;
1355         int num_addrs = 0;
1356
1357         int i;
1358         size_t fd_index;
1359
1360         NTSTATUS status;
1361
1362         *fd = -1;
1363
1364  again:
1365         if (!get_dcs(mem_ctx, domain, &dcs, &num_dcs) || (num_dcs == 0))
1366                 return False;
1367
1368         for (i=0; i<num_dcs; i++) {
1369
1370                 if (!add_string_to_array(mem_ctx, dcs[i].name,
1371                                     &dcnames, &num_dcnames)) {
1372                         return False;
1373                 }
1374                 if (!add_sockaddr_to_array(mem_ctx, &dcs[i].ss, 445,
1375                                       &addrs, &num_addrs)) {
1376                         return False;
1377                 }
1378         }
1379
1380         if ((num_dcnames == 0) || (num_dcnames != num_addrs))
1381                 return False;
1382
1383         if ((addrs == NULL) || (dcnames == NULL))
1384                 return False;
1385
1386         status = smbsock_any_connect(addrs, dcnames, NULL, NULL, NULL,
1387                                      num_addrs, 0, 10, fd, &fd_index, NULL);
1388         if (!NT_STATUS_IS_OK(status)) {
1389                 for (i=0; i<num_dcs; i++) {
1390                         char ab[INET6_ADDRSTRLEN];
1391                         print_sockaddr(ab, sizeof(ab), &dcs[i].ss);
1392                         DEBUG(10, ("find_new_dc: smbsock_any_connect failed for "
1393                                 "domain %s address %s. Error was %s\n",
1394                                    domain->name, ab, nt_errstr(status) ));
1395                         winbind_add_failed_connection_entry(domain,
1396                                 dcs[i].name, NT_STATUS_UNSUCCESSFUL);
1397                 }
1398                 return False;
1399         }
1400
1401         *pss = addrs[fd_index];
1402
1403         if (*dcnames[fd_index] != '\0' && !is_ipaddress(dcnames[fd_index])) {
1404                 /* Ok, we've got a name for the DC */
1405                 fstrcpy(dcname, dcnames[fd_index]);
1406                 return True;
1407         }
1408
1409         /* Try to figure out the name */
1410         if (dcip_to_name(mem_ctx, domain, pss, dcname)) {
1411                 return True;
1412         }
1413
1414         /* We can not continue without the DC's name */
1415         winbind_add_failed_connection_entry(domain, dcs[fd_index].name,
1416                                     NT_STATUS_UNSUCCESSFUL);
1417
1418         /* Throw away all arrays as we're doing this again. */
1419         TALLOC_FREE(dcs);
1420         num_dcs = 0;
1421
1422         TALLOC_FREE(dcnames);
1423         num_dcnames = 0;
1424
1425         TALLOC_FREE(addrs);
1426         num_addrs = 0;
1427
1428         close(*fd);
1429         *fd = -1;
1430
1431         goto again;
1432 }
1433
1434 static char *current_dc_key(TALLOC_CTX *mem_ctx, const char *domain_name)
1435 {
1436         return talloc_asprintf_strupper_m(mem_ctx, "CURRENT_DCNAME/%s",
1437                                           domain_name);
1438 }
1439
1440 static void store_current_dc_in_gencache(const char *domain_name,
1441                                          const char *dc_name,
1442                                          struct cli_state *cli)
1443 {
1444         char addr[INET6_ADDRSTRLEN];
1445         char *key = NULL;
1446         char *value = NULL;
1447
1448         if (!cli_state_is_connected(cli)) {
1449                 return;
1450         }
1451
1452         get_peer_addr(cli->fd, addr, sizeof(addr));
1453
1454         key = current_dc_key(talloc_tos(), domain_name);
1455         if (key == NULL) {
1456                 goto done;
1457         }
1458
1459         value = talloc_asprintf(talloc_tos(), "%s %s", addr, dc_name);
1460         if (value == NULL) {
1461                 goto done;
1462         }
1463
1464         gencache_set(key, value, 0x7fffffff);
1465 done:
1466         TALLOC_FREE(value);
1467         TALLOC_FREE(key);
1468 }
1469
1470 bool fetch_current_dc_from_gencache(TALLOC_CTX *mem_ctx,
1471                                     const char *domain_name,
1472                                     char **p_dc_name, char **p_dc_ip)
1473 {
1474         char *key, *value, *p;
1475         bool ret = false;
1476         char *dc_name = NULL;
1477         char *dc_ip = NULL;
1478
1479         key = current_dc_key(talloc_tos(), domain_name);
1480         if (key == NULL) {
1481                 goto done;
1482         }
1483         if (!gencache_get(key, &value, NULL)) {
1484                 goto done;
1485         }
1486         p = strchr(value, ' ');
1487         if (p == NULL) {
1488                 goto done;
1489         }
1490         dc_ip = talloc_strndup(mem_ctx, value, p - value);
1491         if (dc_ip == NULL) {
1492                 goto done;
1493         }
1494         dc_name = talloc_strdup(mem_ctx, p+1);
1495         if (dc_name == NULL) {
1496                 goto done;
1497         }
1498
1499         if (p_dc_ip != NULL) {
1500                 *p_dc_ip = dc_ip;
1501                 dc_ip = NULL;
1502         }
1503         if (p_dc_name != NULL) {
1504                 *p_dc_name = dc_name;
1505                 dc_name = NULL;
1506         }
1507         ret = true;
1508 done:
1509         TALLOC_FREE(dc_name);
1510         TALLOC_FREE(dc_ip);
1511         TALLOC_FREE(key);
1512         return ret;
1513 }
1514
1515 static NTSTATUS cm_open_connection(struct winbindd_domain *domain,
1516                                    struct winbindd_cm_conn *new_conn)
1517 {
1518         TALLOC_CTX *mem_ctx;
1519         NTSTATUS result;
1520         char *saf_servername = saf_fetch( domain->name );
1521         int retries;
1522
1523         if ((mem_ctx = talloc_init("cm_open_connection")) == NULL) {
1524                 SAFE_FREE(saf_servername);
1525                 set_domain_offline(domain);
1526                 return NT_STATUS_NO_MEMORY;
1527         }
1528
1529         /* we have to check the server affinity cache here since
1530            later we select a DC based on response time and not preference */
1531
1532         /* Check the negative connection cache
1533            before talking to it. It going down may have
1534            triggered the reconnection. */
1535
1536         if ( saf_servername && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, saf_servername))) {
1537
1538                 DEBUG(10,("cm_open_connection: saf_servername is '%s' for domain %s\n",
1539                         saf_servername, domain->name ));
1540
1541                 /* convert an ip address to a name */
1542                 if (is_ipaddress( saf_servername ) ) {
1543                         fstring saf_name;
1544                         struct sockaddr_storage ss;
1545
1546                         if (!interpret_string_addr(&ss, saf_servername,
1547                                                 AI_NUMERICHOST)) {
1548                                 return NT_STATUS_UNSUCCESSFUL;
1549                         }
1550                         if (dcip_to_name(mem_ctx, domain, &ss, saf_name )) {
1551                                 strlcpy(domain->dcname, saf_name, sizeof(domain->dcname));
1552                         } else {
1553                                 winbind_add_failed_connection_entry(
1554                                         domain, saf_servername,
1555                                         NT_STATUS_UNSUCCESSFUL);
1556                         }
1557                 } else {
1558                         fstrcpy( domain->dcname, saf_servername );
1559                 }
1560
1561                 SAFE_FREE( saf_servername );
1562         }
1563
1564         for (retries = 0; retries < 3; retries++) {
1565                 int fd = -1;
1566                 bool retry = False;
1567
1568                 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1569
1570                 DEBUG(10,("cm_open_connection: dcname is '%s' for domain %s\n",
1571                         domain->dcname, domain->name ));
1572
1573                 if (*domain->dcname
1574                         && NT_STATUS_IS_OK(check_negative_conn_cache( domain->name, domain->dcname))
1575                         && (resolve_name(domain->dcname, &domain->dcaddr, 0x20, true)))
1576                 {
1577                         NTSTATUS status;
1578
1579                         status = smbsock_connect(&domain->dcaddr, 0,
1580                                                  NULL, -1, NULL, -1,
1581                                                  &fd, NULL, 10);
1582                         if (!NT_STATUS_IS_OK(status)) {
1583                                 fd = -1;
1584                         }
1585                 }
1586
1587                 if ((fd == -1)
1588                         && !find_new_dc(mem_ctx, domain, domain->dcname, &domain->dcaddr, &fd))
1589                 {
1590                         /* This is the one place where we will
1591                            set the global winbindd offline state
1592                            to true, if a "WINBINDD_OFFLINE" entry
1593                            is found in the winbindd cache. */
1594                         set_global_winbindd_state_offline();
1595                         break;
1596                 }
1597
1598                 new_conn->cli = NULL;
1599
1600                 result = cm_prepare_connection(domain, fd, domain->dcname,
1601                         &new_conn->cli, &retry);
1602
1603                 if (!retry)
1604                         break;
1605         }
1606
1607         if (NT_STATUS_IS_OK(result)) {
1608
1609                 winbindd_set_locator_kdc_envs(domain);
1610
1611                 if (domain->online == False) {
1612                         /* We're changing state from offline to online. */
1613                         set_global_winbindd_state_online();
1614                 }
1615                 set_domain_online(domain);
1616
1617                 /*
1618                  * Much as I hate global state, this seems to be the point
1619                  * where we can be certain that we have a proper connection to
1620                  * a DC. wbinfo --dc-info needs that information, store it in
1621                  * gencache with a looong timeout. This will need revisiting
1622                  * once we start to connect to multiple DCs, wbcDcInfo is
1623                  * already prepared for that.
1624                  */
1625                 store_current_dc_in_gencache(domain->name, domain->dcname,
1626                                              new_conn->cli);
1627         } else {
1628                 /* Ensure we setup the retry handler. */
1629                 set_domain_offline(domain);
1630         }
1631
1632         talloc_destroy(mem_ctx);
1633         return result;
1634 }
1635
1636 /* Close down all open pipes on a connection. */
1637
1638 void invalidate_cm_connection(struct winbindd_cm_conn *conn)
1639 {
1640         NTSTATUS result;
1641
1642         /* We're closing down a possibly dead
1643            connection. Don't have impossibly long (10s) timeouts. */
1644
1645         if (conn->cli) {
1646                 cli_set_timeout(conn->cli, 1000); /* 1 second. */
1647         }
1648
1649         if (conn->samr_pipe != NULL) {
1650                 if (is_valid_policy_hnd(&conn->sam_connect_handle)) {
1651                         dcerpc_samr_Close(conn->samr_pipe->binding_handle,
1652                                           talloc_tos(),
1653                                           &conn->sam_connect_handle,
1654                                           &result);
1655                 }
1656                 TALLOC_FREE(conn->samr_pipe);
1657                 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1658                 if (conn->cli) {
1659                         cli_set_timeout(conn->cli, 500);
1660                 }
1661         }
1662
1663         if (conn->lsa_pipe != NULL) {
1664                 if (is_valid_policy_hnd(&conn->lsa_policy)) {
1665                         dcerpc_lsa_Close(conn->lsa_pipe->binding_handle,
1666                                          talloc_tos(),
1667                                          &conn->lsa_policy,
1668                                          &result);
1669                 }
1670                 TALLOC_FREE(conn->lsa_pipe);
1671                 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1672                 if (conn->cli) {
1673                         cli_set_timeout(conn->cli, 500);
1674                 }
1675         }
1676
1677         if (conn->lsa_pipe_tcp != NULL) {
1678                 if (is_valid_policy_hnd(&conn->lsa_policy)) {
1679                         dcerpc_lsa_Close(conn->lsa_pipe_tcp->binding_handle,
1680                                          talloc_tos(),
1681                                          &conn->lsa_policy,
1682                                          &result);
1683                 }
1684                 TALLOC_FREE(conn->lsa_pipe_tcp);
1685                 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1686                 if (conn->cli) {
1687                         cli_set_timeout(conn->cli, 500);
1688                 }
1689         }
1690
1691         if (conn->netlogon_pipe != NULL) {
1692                 TALLOC_FREE(conn->netlogon_pipe);
1693                 /* Ok, it must be dead. Drop timeout to 0.5 sec. */
1694                 if (conn->cli) {
1695                         cli_set_timeout(conn->cli, 500);
1696                 }
1697         }
1698
1699         if (conn->cli) {
1700                 cli_shutdown(conn->cli);
1701         }
1702
1703         conn->cli = NULL;
1704 }
1705
1706 void close_conns_after_fork(void)
1707 {
1708         struct winbindd_domain *domain;
1709         struct winbindd_cli_state *cli_state;
1710
1711         for (domain = domain_list(); domain; domain = domain->next) {
1712                 struct cli_state *cli = domain->conn.cli;
1713
1714                 /*
1715                  * first close the low level SMB TCP connection
1716                  * so that we don't generate any SMBclose
1717                  * requests in invalidate_cm_connection()
1718                  */
1719                 if (cli_state_is_connected(domain->conn.cli)) {
1720                         cli_state_disconnect(domain->conn.cli);
1721                 }
1722
1723                 invalidate_cm_connection(&domain->conn);
1724         }
1725
1726         for (cli_state = winbindd_client_list();
1727              cli_state != NULL;
1728              cli_state = cli_state->next) {
1729                 if (cli_state->sock >= 0) {
1730                         close(cli_state->sock);
1731                         cli_state->sock = -1;
1732                 }
1733         }
1734 }
1735
1736 static bool connection_ok(struct winbindd_domain *domain)
1737 {
1738         bool ok;
1739
1740         ok = cli_state_is_connected(domain->conn.cli);
1741         if (!ok) {
1742                 DEBUG(3, ("connection_ok: Connection to %s for domain %s is not connected\n",
1743                           domain->dcname, domain->name));
1744                 return False;
1745         }
1746
1747         if (domain->online == False) {
1748                 DEBUG(3, ("connection_ok: Domain %s is offline\n", domain->name));
1749                 return False;
1750         }
1751
1752         return True;
1753 }
1754
1755 /* Initialize a new connection up to the RPC BIND.
1756    Bypass online status check so always does network calls. */
1757
1758 static NTSTATUS init_dc_connection_network(struct winbindd_domain *domain)
1759 {
1760         NTSTATUS result;
1761
1762         /* Internal connections never use the network. */
1763         if (domain->internal) {
1764                 domain->initialized = True;
1765                 return NT_STATUS_OK;
1766         }
1767
1768         if (!winbindd_can_contact_domain(domain)) {
1769                 invalidate_cm_connection(&domain->conn);
1770                 domain->initialized = True;
1771                 return NT_STATUS_OK;
1772         }
1773
1774         if (connection_ok(domain)) {
1775                 if (!domain->initialized) {
1776                         set_dc_type_and_flags(domain);
1777                 }
1778                 return NT_STATUS_OK;
1779         }
1780
1781         invalidate_cm_connection(&domain->conn);
1782
1783         result = cm_open_connection(domain, &domain->conn);
1784
1785         if (NT_STATUS_IS_OK(result) && !domain->initialized) {
1786                 set_dc_type_and_flags(domain);
1787         }
1788
1789         return result;
1790 }
1791
1792 NTSTATUS init_dc_connection(struct winbindd_domain *domain)
1793 {
1794         if (domain->internal) {
1795                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
1796         }
1797
1798         if (domain->initialized && !domain->online) {
1799                 /* We check for online status elsewhere. */
1800                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1801         }
1802
1803         return init_dc_connection_network(domain);
1804 }
1805
1806 static NTSTATUS init_dc_connection_rpc(struct winbindd_domain *domain)
1807 {
1808         NTSTATUS status;
1809
1810         status = init_dc_connection(domain);
1811         if (!NT_STATUS_IS_OK(status)) {
1812                 return status;
1813         }
1814
1815         if (!domain->internal && domain->conn.cli == NULL) {
1816                 /* happens for trusted domains without inbound trust */
1817                 return NT_STATUS_TRUSTED_DOMAIN_FAILURE;
1818         }
1819
1820         return NT_STATUS_OK;
1821 }
1822
1823 /******************************************************************************
1824  Set the trust flags (direction and forest location) for a domain
1825 ******************************************************************************/
1826
1827 static bool set_dc_type_and_flags_trustinfo( struct winbindd_domain *domain )
1828 {
1829         struct winbindd_domain *our_domain;
1830         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
1831         WERROR werr;
1832         struct netr_DomainTrustList trusts;
1833         int i;
1834         uint32 flags = (NETR_TRUST_FLAG_IN_FOREST |
1835                         NETR_TRUST_FLAG_OUTBOUND |
1836                         NETR_TRUST_FLAG_INBOUND);
1837         struct rpc_pipe_client *cli;
1838         TALLOC_CTX *mem_ctx = NULL;
1839         struct dcerpc_binding_handle *b;
1840
1841         DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s\n", domain->name ));
1842
1843         /* Our primary domain doesn't need to worry about trust flags.
1844            Force it to go through the network setup */
1845         if ( domain->primary ) {
1846                 return False;
1847         }
1848
1849         our_domain = find_our_domain();
1850
1851         if ( !connection_ok(our_domain) ) {
1852                 DEBUG(3,("set_dc_type_and_flags_trustinfo: No connection to our domain!\n"));
1853                 return False;
1854         }
1855
1856         /* This won't work unless our domain is AD */
1857
1858         if ( !our_domain->active_directory ) {
1859                 return False;
1860         }
1861
1862         /* Use DsEnumerateDomainTrusts to get us the trust direction
1863            and type */
1864
1865         result = cm_connect_netlogon(our_domain, &cli);
1866
1867         if (!NT_STATUS_IS_OK(result)) {
1868                 DEBUG(5, ("set_dc_type_and_flags_trustinfo: Could not open "
1869                           "a connection to %s for PIPE_NETLOGON (%s)\n",
1870                           domain->name, nt_errstr(result)));
1871                 return False;
1872         }
1873
1874         b = cli->binding_handle;
1875
1876         if ( (mem_ctx = talloc_init("set_dc_type_and_flags_trustinfo")) == NULL ) {
1877                 DEBUG(0,("set_dc_type_and_flags_trustinfo: talloc_init() failed!\n"));
1878                 return False;
1879         }
1880
1881         result = dcerpc_netr_DsrEnumerateDomainTrusts(b, mem_ctx,
1882                                                       cli->desthost,
1883                                                       flags,
1884                                                       &trusts,
1885                                                       &werr);
1886         if (!NT_STATUS_IS_OK(result)) {
1887                 DEBUG(0,("set_dc_type_and_flags_trustinfo: "
1888                         "failed to query trusted domain list: %s\n",
1889                         nt_errstr(result)));
1890                 talloc_destroy(mem_ctx);
1891                 return false;
1892         }
1893         if (!W_ERROR_IS_OK(werr)) {
1894                 DEBUG(0,("set_dc_type_and_flags_trustinfo: "
1895                         "failed to query trusted domain list: %s\n",
1896                         win_errstr(werr)));
1897                 talloc_destroy(mem_ctx);
1898                 return false;
1899         }
1900
1901         /* Now find the domain name and get the flags */
1902
1903         for ( i=0; i<trusts.count; i++ ) {
1904                 if ( strequal( domain->name, trusts.array[i].netbios_name) ) {
1905                         domain->domain_flags          = trusts.array[i].trust_flags;
1906                         domain->domain_type           = trusts.array[i].trust_type;
1907                         domain->domain_trust_attribs  = trusts.array[i].trust_attributes;
1908
1909                         if ( domain->domain_type == NETR_TRUST_TYPE_UPLEVEL )
1910                                 domain->active_directory = True;
1911
1912                         /* This flag is only set if the domain is *our*
1913                            primary domain and the primary domain is in
1914                            native mode */
1915
1916                         domain->native_mode = (domain->domain_flags & NETR_TRUST_FLAG_NATIVE);
1917
1918                         DEBUG(5, ("set_dc_type_and_flags_trustinfo: domain %s is %sin "
1919                                   "native mode.\n", domain->name,
1920                                   domain->native_mode ? "" : "NOT "));
1921
1922                         DEBUG(5,("set_dc_type_and_flags_trustinfo: domain %s is %s"
1923                                  "running active directory.\n", domain->name,
1924                                  domain->active_directory ? "" : "NOT "));
1925
1926
1927                         domain->initialized = True;
1928
1929                         break;
1930                 }
1931         }
1932
1933         talloc_destroy( mem_ctx );
1934
1935         return domain->initialized;
1936 }
1937
1938 /******************************************************************************
1939  We can 'sense' certain things about the DC by it's replies to certain
1940  questions.
1941
1942  This tells us if this particular remote server is Active Directory, and if it
1943  is native mode.
1944 ******************************************************************************/
1945
1946 static void set_dc_type_and_flags_connect( struct winbindd_domain *domain )
1947 {
1948         NTSTATUS status, result;
1949         WERROR werr;
1950         TALLOC_CTX              *mem_ctx = NULL;
1951         struct rpc_pipe_client  *cli = NULL;
1952         struct policy_handle pol;
1953         union dssetup_DsRoleInfo info;
1954         union lsa_PolicyInformation *lsa_info = NULL;
1955
1956         if (!connection_ok(domain)) {
1957                 return;
1958         }
1959
1960         mem_ctx = talloc_init("set_dc_type_and_flags on domain %s\n",
1961                               domain->name);
1962         if (!mem_ctx) {
1963                 DEBUG(1, ("set_dc_type_and_flags_connect: talloc_init() failed\n"));
1964                 return;
1965         }
1966
1967         DEBUG(5, ("set_dc_type_and_flags_connect: domain %s\n", domain->name ));
1968
1969         status = cli_rpc_pipe_open_noauth(domain->conn.cli,
1970                                           &ndr_table_dssetup.syntax_id,
1971                                           &cli);
1972
1973         if (!NT_STATUS_IS_OK(status)) {
1974                 DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
1975                           "PI_DSSETUP on domain %s: (%s)\n",
1976                           domain->name, nt_errstr(status)));
1977
1978                 /* if this is just a non-AD domain we need to continue
1979                  * identifying so that we can in the end return with
1980                  * domain->initialized = True - gd */
1981
1982                 goto no_dssetup;
1983         }
1984
1985         status = dcerpc_dssetup_DsRoleGetPrimaryDomainInformation(cli->binding_handle, mem_ctx,
1986                                                                   DS_ROLE_BASIC_INFORMATION,
1987                                                                   &info,
1988                                                                   &werr);
1989         TALLOC_FREE(cli);
1990
1991         if (NT_STATUS_IS_OK(status)) {
1992                 result = werror_to_ntstatus(werr);
1993         }
1994         if (!NT_STATUS_IS_OK(status)) {
1995                 DEBUG(5, ("set_dc_type_and_flags_connect: rpccli_ds_getprimarydominfo "
1996                           "on domain %s failed: (%s)\n",
1997                           domain->name, nt_errstr(status)));
1998
1999                 /* older samba3 DCs will return DCERPC_FAULT_OP_RNG_ERROR for
2000                  * every opcode on the DSSETUP pipe, continue with
2001                  * no_dssetup mode here as well to get domain->initialized
2002                  * set - gd */
2003
2004                 if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE)) {
2005                         goto no_dssetup;
2006                 }
2007
2008                 TALLOC_FREE(mem_ctx);
2009                 return;
2010         }
2011
2012         if ((info.basic.flags & DS_ROLE_PRIMARY_DS_RUNNING) &&
2013             !(info.basic.flags & DS_ROLE_PRIMARY_DS_MIXED_MODE)) {
2014                 domain->native_mode = True;
2015         } else {
2016                 domain->native_mode = False;
2017         }
2018
2019 no_dssetup:
2020         status = cli_rpc_pipe_open_noauth(domain->conn.cli,
2021                                           &ndr_table_lsarpc.syntax_id, &cli);
2022
2023         if (!NT_STATUS_IS_OK(status)) {
2024                 DEBUG(5, ("set_dc_type_and_flags_connect: Could not bind to "
2025                           "PI_LSARPC on domain %s: (%s)\n",
2026                           domain->name, nt_errstr(status)));
2027                 TALLOC_FREE(cli);
2028                 TALLOC_FREE(mem_ctx);
2029                 return;
2030         }
2031
2032         status = rpccli_lsa_open_policy2(cli, mem_ctx, True,
2033                                          SEC_FLAG_MAXIMUM_ALLOWED, &pol);
2034
2035         if (NT_STATUS_IS_OK(status)) {
2036                 /* This particular query is exactly what Win2k clients use
2037                    to determine that the DC is active directory */
2038                 status = dcerpc_lsa_QueryInfoPolicy2(cli->binding_handle, mem_ctx,
2039                                                      &pol,
2040                                                      LSA_POLICY_INFO_DNS,
2041                                                      &lsa_info,
2042                                                      &result);
2043         }
2044
2045         if (NT_STATUS_IS_OK(status) && NT_STATUS_IS_OK(result)) {
2046                 domain->active_directory = True;
2047
2048                 if (lsa_info->dns.name.string) {
2049                         fstrcpy(domain->name, lsa_info->dns.name.string);
2050                 }
2051
2052                 if (lsa_info->dns.dns_domain.string) {
2053                         fstrcpy(domain->alt_name,
2054                                 lsa_info->dns.dns_domain.string);
2055                 }
2056
2057                 /* See if we can set some domain trust flags about
2058                    ourself */
2059
2060                 if (lsa_info->dns.dns_forest.string) {
2061                         fstrcpy(domain->forest_name,
2062                                 lsa_info->dns.dns_forest.string);
2063
2064                         if (strequal(domain->forest_name, domain->alt_name)) {
2065                                 domain->domain_flags |= NETR_TRUST_FLAG_TREEROOT;
2066                         }
2067                 }
2068
2069                 if (lsa_info->dns.sid) {
2070                         sid_copy(&domain->sid, lsa_info->dns.sid);
2071                 }
2072         } else {
2073                 domain->active_directory = False;
2074
2075                 status = rpccli_lsa_open_policy(cli, mem_ctx, True,
2076                                                 SEC_FLAG_MAXIMUM_ALLOWED,
2077                                                 &pol);
2078
2079                 if (!NT_STATUS_IS_OK(status)) {
2080                         goto done;
2081                 }
2082
2083                 status = dcerpc_lsa_QueryInfoPolicy(cli->binding_handle, mem_ctx,
2084                                                     &pol,
2085                                                     LSA_POLICY_INFO_ACCOUNT_DOMAIN,
2086                                                     &lsa_info,
2087                                                     &result);
2088                 if (NT_STATUS_IS_OK(status) && NT_STATUS_IS_OK(result)) {
2089
2090                         if (lsa_info->account_domain.name.string) {
2091                                 fstrcpy(domain->name,
2092                                         lsa_info->account_domain.name.string);
2093                         }
2094
2095                         if (lsa_info->account_domain.sid) {
2096                                 sid_copy(&domain->sid, lsa_info->account_domain.sid);
2097                         }
2098                 }
2099         }
2100 done:
2101
2102         DEBUG(5, ("set_dc_type_and_flags_connect: domain %s is %sin native mode.\n",
2103                   domain->name, domain->native_mode ? "" : "NOT "));
2104
2105         DEBUG(5,("set_dc_type_and_flags_connect: domain %s is %srunning active directory.\n",
2106                   domain->name, domain->active_directory ? "" : "NOT "));
2107
2108         domain->can_do_ncacn_ip_tcp = domain->active_directory;
2109         domain->can_do_validation6 = domain->active_directory;
2110
2111         TALLOC_FREE(cli);
2112
2113         TALLOC_FREE(mem_ctx);
2114
2115         domain->initialized = True;
2116 }
2117
2118 /**********************************************************************
2119  Set the domain_flags (trust attributes, domain operating modes, etc...
2120 ***********************************************************************/
2121
2122 static void set_dc_type_and_flags( struct winbindd_domain *domain )
2123 {
2124         /* we always have to contact our primary domain */
2125
2126         if ( domain->primary ) {
2127                 DEBUG(10,("set_dc_type_and_flags: setting up flags for "
2128                           "primary domain\n"));
2129                 set_dc_type_and_flags_connect( domain );
2130                 return;
2131         }
2132
2133         /* Use our DC to get the information if possible */
2134
2135         if ( !set_dc_type_and_flags_trustinfo( domain ) ) {
2136                 /* Otherwise, fallback to contacting the
2137                    domain directly */
2138                 set_dc_type_and_flags_connect( domain );
2139         }
2140
2141         return;
2142 }
2143
2144
2145
2146 /**********************************************************************
2147 ***********************************************************************/
2148
2149 static NTSTATUS cm_get_schannel_creds(struct winbindd_domain *domain,
2150                                    struct netlogon_creds_CredentialState **ppdc)
2151 {
2152         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
2153         struct rpc_pipe_client *netlogon_pipe;
2154
2155         if (lp_client_schannel() == False) {
2156                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
2157         }
2158
2159         result = cm_connect_netlogon(domain, &netlogon_pipe);
2160         if (!NT_STATUS_IS_OK(result)) {
2161                 return result;
2162         }
2163
2164         /* Return a pointer to the struct netlogon_creds_CredentialState from the
2165            netlogon pipe. */
2166
2167         if (!domain->conn.netlogon_pipe->dc) {
2168                 return NT_STATUS_INTERNAL_ERROR; /* This shouldn't happen. */
2169         }
2170
2171         *ppdc = domain->conn.netlogon_pipe->dc;
2172         return NT_STATUS_OK;
2173 }
2174
2175 NTSTATUS cm_connect_sam(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
2176                         struct rpc_pipe_client **cli, struct policy_handle *sam_handle)
2177 {
2178         struct winbindd_cm_conn *conn;
2179         NTSTATUS status, result;
2180         struct netlogon_creds_CredentialState *p_creds;
2181         char *machine_password = NULL;
2182         char *machine_account = NULL;
2183         char *domain_name = NULL;
2184
2185         if (sid_check_is_domain(&domain->sid)) {
2186                 return open_internal_samr_conn(mem_ctx, domain, cli, sam_handle);
2187         }
2188
2189         status = init_dc_connection_rpc(domain);
2190         if (!NT_STATUS_IS_OK(status)) {
2191                 return status;
2192         }
2193
2194         conn = &domain->conn;
2195
2196         if (rpccli_is_connected(conn->samr_pipe)) {
2197                 goto done;
2198         }
2199
2200         TALLOC_FREE(conn->samr_pipe);
2201
2202         /*
2203          * No SAMR pipe yet. Attempt to get an NTLMSSP SPNEGO authenticated
2204          * sign and sealed pipe using the machine account password by
2205          * preference. If we can't - try schannel, if that fails, try
2206          * anonymous.
2207          */
2208
2209         if ((conn->cli->user_name[0] == '\0') ||
2210             (conn->cli->domain[0] == '\0') ||
2211             (conn->cli->password == NULL || conn->cli->password[0] == '\0'))
2212         {
2213                 status = get_trust_creds(domain, &machine_password,
2214                                          &machine_account, NULL);
2215                 if (!NT_STATUS_IS_OK(status)) {
2216                         DEBUG(10, ("cm_connect_sam: No no user available for "
2217                                    "domain %s, trying schannel\n", conn->cli->domain));
2218                         goto schannel;
2219                 }
2220                 domain_name = domain->name;
2221         } else {
2222                 machine_password = SMB_STRDUP(conn->cli->password);
2223                 machine_account = SMB_STRDUP(conn->cli->user_name);
2224                 domain_name = conn->cli->domain;
2225         }
2226
2227         if (!machine_password || !machine_account) {
2228                 status = NT_STATUS_NO_MEMORY;
2229                 goto done;
2230         }
2231
2232         /* We have an authenticated connection. Use a NTLMSSP SPNEGO
2233            authenticated SAMR pipe with sign & seal. */
2234         status = cli_rpc_pipe_open_spnego_ntlmssp(conn->cli,
2235                                                   &ndr_table_samr.syntax_id,
2236                                                   NCACN_NP,
2237                                                   DCERPC_AUTH_LEVEL_PRIVACY,
2238                                                   domain_name,
2239                                                   machine_account,
2240                                                   machine_password,
2241                                                   &conn->samr_pipe);
2242
2243         if (!NT_STATUS_IS_OK(status)) {
2244                 DEBUG(10,("cm_connect_sam: failed to connect to SAMR "
2245                           "pipe for domain %s using NTLMSSP "
2246                           "authenticated pipe: user %s\\%s. Error was "
2247                           "%s\n", domain->name, domain_name,
2248                           machine_account, nt_errstr(status)));
2249                 goto schannel;
2250         }
2251
2252         DEBUG(10,("cm_connect_sam: connected to SAMR pipe for "
2253                   "domain %s using NTLMSSP authenticated "
2254                   "pipe: user %s\\%s\n", domain->name,
2255                   domain_name, machine_account));
2256
2257         status = dcerpc_samr_Connect2(conn->samr_pipe->binding_handle, mem_ctx,
2258                                       conn->samr_pipe->desthost,
2259                                       SEC_FLAG_MAXIMUM_ALLOWED,
2260                                       &conn->sam_connect_handle,
2261                                       &result);
2262         if (NT_STATUS_IS_OK(status) && NT_STATUS_IS_OK(result)) {
2263                 goto open_domain;
2264         }
2265         if (NT_STATUS_IS_OK(status)) {
2266                 status = result;
2267         }
2268
2269         DEBUG(10,("cm_connect_sam: ntlmssp-sealed dcerpc_samr_Connect2 "
2270                   "failed for domain %s, error was %s. Trying schannel\n",
2271                   domain->name, nt_errstr(status) ));
2272         TALLOC_FREE(conn->samr_pipe);
2273
2274  schannel:
2275
2276         /* Fall back to schannel if it's a W2K pre-SP1 box. */
2277
2278         status = cm_get_schannel_creds(domain, &p_creds);
2279         if (!NT_STATUS_IS_OK(status)) {
2280                 /* If this call fails - conn->cli can now be NULL ! */
2281                 DEBUG(10, ("cm_connect_sam: Could not get schannel auth info "
2282                            "for domain %s (error %s), trying anon\n",
2283                         domain->name,
2284                         nt_errstr(status) ));
2285                 goto anonymous;
2286         }
2287         status = cli_rpc_pipe_open_schannel_with_key
2288                 (conn->cli, &ndr_table_samr.syntax_id, NCACN_NP,
2289                  DCERPC_AUTH_LEVEL_PRIVACY,
2290                  domain->name, &p_creds, &conn->samr_pipe);
2291
2292         if (!NT_STATUS_IS_OK(status)) {
2293                 DEBUG(10,("cm_connect_sam: failed to connect to SAMR pipe for "
2294                           "domain %s using schannel. Error was %s\n",
2295                           domain->name, nt_errstr(status) ));
2296                 goto anonymous;
2297         }
2298         DEBUG(10,("cm_connect_sam: connected to SAMR pipe for domain %s using "
2299                   "schannel.\n", domain->name ));
2300
2301         status = dcerpc_samr_Connect2(conn->samr_pipe->binding_handle, mem_ctx,
2302                                       conn->samr_pipe->desthost,
2303                                       SEC_FLAG_MAXIMUM_ALLOWED,
2304                                       &conn->sam_connect_handle,
2305                                       &result);
2306         if (NT_STATUS_IS_OK(status) && NT_STATUS_IS_OK(result)) {
2307                 goto open_domain;
2308         }
2309         if (NT_STATUS_IS_OK(status)) {
2310                 status = result;
2311         }
2312         DEBUG(10,("cm_connect_sam: schannel-sealed dcerpc_samr_Connect2 failed "
2313                   "for domain %s, error was %s. Trying anonymous\n",
2314                   domain->name, nt_errstr(status) ));
2315         TALLOC_FREE(conn->samr_pipe);
2316
2317  anonymous:
2318
2319         /* Finally fall back to anonymous. */
2320         status = cli_rpc_pipe_open_noauth(conn->cli, &ndr_table_samr.syntax_id,
2321                                           &conn->samr_pipe);
2322
2323         if (!NT_STATUS_IS_OK(status)) {
2324                 goto done;
2325         }
2326
2327         status = dcerpc_samr_Connect2(conn->samr_pipe->binding_handle, mem_ctx,
2328                                       conn->samr_pipe->desthost,
2329                                       SEC_FLAG_MAXIMUM_ALLOWED,
2330                                       &conn->sam_connect_handle,
2331                                       &result);
2332         if (!NT_STATUS_IS_OK(status)) {
2333                 DEBUG(10,("cm_connect_sam: rpccli_samr_Connect2 failed "
2334                           "for domain %s Error was %s\n",
2335                           domain->name, nt_errstr(status) ));
2336                 goto done;
2337         }
2338         if (!NT_STATUS_IS_OK(result)) {
2339                 status = result;
2340                 DEBUG(10,("cm_connect_sam: dcerpc_samr_Connect2 failed "
2341                           "for domain %s Error was %s\n",
2342                           domain->name, nt_errstr(result)));
2343                 goto done;
2344         }
2345
2346  open_domain:
2347         status = dcerpc_samr_OpenDomain(conn->samr_pipe->binding_handle,
2348                                         mem_ctx,
2349                                         &conn->sam_connect_handle,
2350                                         SEC_FLAG_MAXIMUM_ALLOWED,
2351                                         &domain->sid,
2352                                         &conn->sam_domain_handle,
2353                                         &result);
2354         if (!NT_STATUS_IS_OK(status)) {
2355                 goto done;
2356         }
2357
2358         status = result;
2359  done:
2360
2361         if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
2362                 /*
2363                  * if we got access denied, we might just have no access rights
2364                  * to talk to the remote samr server server (e.g. when we are a
2365                  * PDC and we are connecting a w2k8 pdc via an interdomain
2366                  * trust). In that case do not invalidate the whole connection
2367                  * stack
2368                  */
2369                 TALLOC_FREE(conn->samr_pipe);
2370                 ZERO_STRUCT(conn->sam_domain_handle);
2371                 return status;
2372         } else if (!NT_STATUS_IS_OK(status)) {
2373                 invalidate_cm_connection(conn);
2374                 return status;
2375         }
2376
2377         *cli = conn->samr_pipe;
2378         *sam_handle = conn->sam_domain_handle;
2379         SAFE_FREE(machine_password);
2380         SAFE_FREE(machine_account);
2381         return status;
2382 }
2383
2384 /**********************************************************************
2385  open an schanneld ncacn_ip_tcp connection to LSA
2386 ***********************************************************************/
2387
2388 NTSTATUS cm_connect_lsa_tcp(struct winbindd_domain *domain,
2389                             TALLOC_CTX *mem_ctx,
2390                             struct rpc_pipe_client **cli)
2391 {
2392         struct winbindd_cm_conn *conn;
2393         struct netlogon_creds_CredentialState *creds;
2394         NTSTATUS status;
2395
2396         DEBUG(10,("cm_connect_lsa_tcp\n"));
2397
2398         status = init_dc_connection_rpc(domain);
2399         if (!NT_STATUS_IS_OK(status)) {
2400                 return status;
2401         }
2402
2403         conn = &domain->conn;
2404
2405         if (conn->lsa_pipe_tcp &&
2406             conn->lsa_pipe_tcp->transport->transport == NCACN_IP_TCP &&
2407             conn->lsa_pipe_tcp->auth->auth_level == DCERPC_AUTH_LEVEL_PRIVACY &&
2408             rpccli_is_connected(conn->lsa_pipe_tcp)) {
2409                 goto done;
2410         }
2411
2412         TALLOC_FREE(conn->lsa_pipe_tcp);
2413
2414         status = cm_get_schannel_creds(domain, &creds);
2415         if (!NT_STATUS_IS_OK(status)) {
2416                 goto done;
2417         }
2418
2419         status = cli_rpc_pipe_open_schannel_with_key(conn->cli,
2420                                                      &ndr_table_lsarpc.syntax_id,
2421                                                      NCACN_IP_TCP,
2422                                                      DCERPC_AUTH_LEVEL_PRIVACY,
2423                                                      domain->name,
2424                                                      &creds,
2425                                                      &conn->lsa_pipe_tcp);
2426         if (!NT_STATUS_IS_OK(status)) {
2427                 DEBUG(10,("cli_rpc_pipe_open_schannel_with_key failed: %s\n",
2428                         nt_errstr(status)));
2429                 goto done;
2430         }
2431
2432  done:
2433         if (!NT_STATUS_IS_OK(status)) {
2434                 TALLOC_FREE(conn->lsa_pipe_tcp);
2435                 return status;
2436         }
2437
2438         *cli = conn->lsa_pipe_tcp;
2439
2440         return status;
2441 }
2442
2443 NTSTATUS cm_connect_lsa(struct winbindd_domain *domain, TALLOC_CTX *mem_ctx,
2444                         struct rpc_pipe_client **cli, struct policy_handle *lsa_policy)
2445 {
2446         struct winbindd_cm_conn *conn;
2447         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
2448         struct netlogon_creds_CredentialState *p_creds;
2449
2450         result = init_dc_connection_rpc(domain);
2451         if (!NT_STATUS_IS_OK(result))
2452                 return result;
2453
2454         conn = &domain->conn;
2455
2456         if (rpccli_is_connected(conn->lsa_pipe)) {
2457                 goto done;
2458         }
2459
2460         TALLOC_FREE(conn->lsa_pipe);
2461
2462         if ((conn->cli->user_name[0] == '\0') ||
2463             (conn->cli->domain[0] == '\0') ||
2464             (conn->cli->password == NULL || conn->cli->password[0] == '\0')) {
2465                 DEBUG(10, ("cm_connect_lsa: No no user available for "
2466                            "domain %s, trying schannel\n", conn->cli->domain));
2467                 goto schannel;
2468         }
2469
2470         /* We have an authenticated connection. Use a NTLMSSP SPNEGO
2471          * authenticated LSA pipe with sign & seal. */
2472         result = cli_rpc_pipe_open_spnego_ntlmssp
2473                 (conn->cli, &ndr_table_lsarpc.syntax_id, NCACN_NP,
2474                  DCERPC_AUTH_LEVEL_PRIVACY,
2475                  conn->cli->domain, conn->cli->user_name, conn->cli->password,
2476                  &conn->lsa_pipe);
2477
2478         if (!NT_STATUS_IS_OK(result)) {
2479                 DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
2480                           "domain %s using NTLMSSP authenticated pipe: user "
2481                           "%s\\%s. Error was %s. Trying schannel.\n",
2482                           domain->name, conn->cli->domain,
2483                           conn->cli->user_name, nt_errstr(result)));
2484                 goto schannel;
2485         }
2486
2487         DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
2488                   "NTLMSSP authenticated pipe: user %s\\%s\n",
2489                   domain->name, conn->cli->domain, conn->cli->user_name ));
2490
2491         result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2492                                         SEC_FLAG_MAXIMUM_ALLOWED,
2493                                         &conn->lsa_policy);
2494         if (NT_STATUS_IS_OK(result)) {
2495                 goto done;
2496         }
2497
2498         DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
2499                   "schannel\n"));
2500
2501         TALLOC_FREE(conn->lsa_pipe);
2502
2503  schannel:
2504
2505         /* Fall back to schannel if it's a W2K pre-SP1 box. */
2506
2507         result = cm_get_schannel_creds(domain, &p_creds);
2508         if (!NT_STATUS_IS_OK(result)) {
2509                 /* If this call fails - conn->cli can now be NULL ! */
2510                 DEBUG(10, ("cm_connect_lsa: Could not get schannel auth info "
2511                            "for domain %s (error %s), trying anon\n",
2512                         domain->name,
2513                         nt_errstr(result) ));
2514                 goto anonymous;
2515         }
2516         result = cli_rpc_pipe_open_schannel_with_key
2517                 (conn->cli, &ndr_table_lsarpc.syntax_id, NCACN_NP,
2518                  DCERPC_AUTH_LEVEL_PRIVACY,
2519                  domain->name, &p_creds, &conn->lsa_pipe);
2520
2521         if (!NT_STATUS_IS_OK(result)) {
2522                 DEBUG(10,("cm_connect_lsa: failed to connect to LSA pipe for "
2523                           "domain %s using schannel. Error was %s\n",
2524                           domain->name, nt_errstr(result) ));
2525                 goto anonymous;
2526         }
2527         DEBUG(10,("cm_connect_lsa: connected to LSA pipe for domain %s using "
2528                   "schannel.\n", domain->name ));
2529
2530         result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2531                                         SEC_FLAG_MAXIMUM_ALLOWED,
2532                                         &conn->lsa_policy);
2533         if (NT_STATUS_IS_OK(result)) {
2534                 goto done;
2535         }
2536
2537         DEBUG(10,("cm_connect_lsa: rpccli_lsa_open_policy failed, trying "
2538                   "anonymous\n"));
2539
2540         TALLOC_FREE(conn->lsa_pipe);
2541
2542  anonymous:
2543
2544         result = cli_rpc_pipe_open_noauth(conn->cli,
2545                                           &ndr_table_lsarpc.syntax_id,
2546                                           &conn->lsa_pipe);
2547         if (!NT_STATUS_IS_OK(result)) {
2548                 result = NT_STATUS_PIPE_NOT_AVAILABLE;
2549                 goto done;
2550         }
2551
2552         result = rpccli_lsa_open_policy(conn->lsa_pipe, mem_ctx, True,
2553                                         SEC_FLAG_MAXIMUM_ALLOWED,
2554                                         &conn->lsa_policy);
2555  done:
2556         if (!NT_STATUS_IS_OK(result)) {
2557                 invalidate_cm_connection(conn);
2558                 return result;
2559         }
2560
2561         *cli = conn->lsa_pipe;
2562         *lsa_policy = conn->lsa_policy;
2563         return result;
2564 }
2565
2566 /****************************************************************************
2567  Open the netlogon pipe to this DC. Use schannel if specified in client conf.
2568  session key stored in conn->netlogon_pipe->dc->sess_key.
2569 ****************************************************************************/
2570
2571 NTSTATUS cm_connect_netlogon(struct winbindd_domain *domain,
2572                              struct rpc_pipe_client **cli)
2573 {
2574         struct winbindd_cm_conn *conn;
2575         NTSTATUS result;
2576
2577         uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
2578         uint8  mach_pwd[16];
2579         enum netr_SchannelType sec_chan_type;
2580         const char *account_name;
2581         struct rpc_pipe_client *netlogon_pipe = NULL;
2582
2583         *cli = NULL;
2584
2585         result = init_dc_connection_rpc(domain);
2586         if (!NT_STATUS_IS_OK(result)) {
2587                 return result;
2588         }
2589
2590         conn = &domain->conn;
2591
2592         if (rpccli_is_connected(conn->netlogon_pipe)) {
2593                 *cli = conn->netlogon_pipe;
2594                 return NT_STATUS_OK;
2595         }
2596
2597         TALLOC_FREE(conn->netlogon_pipe);
2598
2599         result = cli_rpc_pipe_open_noauth(conn->cli,
2600                                           &ndr_table_netlogon.syntax_id,
2601                                           &netlogon_pipe);
2602         if (!NT_STATUS_IS_OK(result)) {
2603                 return result;
2604         }
2605
2606         if ((!IS_DC) && (!domain->primary)) {
2607                 /* Clear the schannel request bit and drop down */
2608                 neg_flags &= ~NETLOGON_NEG_SCHANNEL;
2609                 goto no_schannel;
2610         }
2611
2612         if (lp_client_schannel() != False) {
2613                 neg_flags |= NETLOGON_NEG_SCHANNEL;
2614         }
2615
2616         if (!get_trust_pw_hash(domain->name, mach_pwd, &account_name,
2617                                &sec_chan_type))
2618         {
2619                 TALLOC_FREE(netlogon_pipe);
2620                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
2621         }
2622
2623         result = rpccli_netlogon_setup_creds(
2624                  netlogon_pipe,
2625                  domain->dcname, /* server name. */
2626                  domain->name,   /* domain name */
2627                  lp_netbios_name(), /* client name */
2628                  account_name,   /* machine account */
2629                  mach_pwd,       /* machine password */
2630                  sec_chan_type,  /* from get_trust_pw */
2631                  &neg_flags);
2632
2633         if (!NT_STATUS_IS_OK(result)) {
2634                 TALLOC_FREE(netlogon_pipe);
2635                 return result;
2636         }
2637
2638         if ((lp_client_schannel() == True) &&
2639                         ((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
2640                 DEBUG(3, ("Server did not offer schannel\n"));
2641                 TALLOC_FREE(netlogon_pipe);
2642                 return NT_STATUS_ACCESS_DENIED;
2643         }
2644
2645  no_schannel:
2646         if ((lp_client_schannel() == False) ||
2647                         ((neg_flags & NETLOGON_NEG_SCHANNEL) == 0)) {
2648                 /*
2649                  * NetSamLogonEx only works for schannel
2650                  */
2651                 domain->can_do_samlogon_ex = False;
2652
2653                 /* We're done - just keep the existing connection to NETLOGON
2654                  * open */
2655                 conn->netlogon_pipe = netlogon_pipe;
2656                 *cli = conn->netlogon_pipe;
2657                 return NT_STATUS_OK;
2658         }
2659
2660         /* Using the credentials from the first pipe, open a signed and sealed
2661            second netlogon pipe. The session key is stored in the schannel
2662            part of the new pipe auth struct.
2663         */
2664
2665         result = cli_rpc_pipe_open_schannel_with_key(
2666                 conn->cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
2667                 DCERPC_AUTH_LEVEL_PRIVACY, domain->name, &netlogon_pipe->dc,
2668                 &conn->netlogon_pipe);
2669
2670         /* We can now close the initial netlogon pipe. */
2671         TALLOC_FREE(netlogon_pipe);
2672
2673         if (!NT_STATUS_IS_OK(result)) {
2674                 DEBUG(3, ("Could not open schannel'ed NETLOGON pipe. Error "
2675                           "was %s\n", nt_errstr(result)));
2676
2677                 invalidate_cm_connection(conn);
2678                 return result;
2679         }
2680
2681         /*
2682          * Always try netr_LogonSamLogonEx. We will fall back for NT4
2683          * which gives DCERPC_FAULT_OP_RNG_ERROR (function not
2684          * supported). We used to only try SamLogonEx for AD, but
2685          * Samba DCs can also do it. And because we don't distinguish
2686          * between Samba and NT4, always try it once.
2687          */
2688         domain->can_do_samlogon_ex = true;
2689
2690         *cli = conn->netlogon_pipe;
2691         return NT_STATUS_OK;
2692 }
2693
2694 void winbind_msg_ip_dropped(struct messaging_context *msg_ctx,
2695                             void *private_data,
2696                             uint32_t msg_type,
2697                             struct server_id server_id,
2698                             DATA_BLOB *data)
2699 {
2700         struct winbindd_domain *domain;
2701         char *freeit = NULL;
2702         char *addr;
2703
2704         if ((data == NULL)
2705             || (data->data == NULL)
2706             || (data->length == 0)
2707             || (data->data[data->length-1] != '\0')) {
2708                 DEBUG(1, ("invalid msg_ip_dropped message: not a valid "
2709                           "string\n"));
2710                 return;
2711         }
2712
2713         addr = (char *)data->data;
2714         DEBUG(10, ("IP %s dropped\n", addr));
2715
2716         if (!is_ipaddress(addr)) {
2717                 char *slash;
2718                 /*
2719                  * Some code sends us ip addresses with the /netmask
2720                  * suffix
2721                  */
2722                 slash = strchr(addr, '/');
2723                 if (slash == NULL) {
2724                         DEBUG(1, ("invalid msg_ip_dropped message: %s",
2725                                   addr));
2726                         return;
2727                 }
2728                 freeit = talloc_strndup(talloc_tos(), addr, slash-addr);
2729                 if (freeit == NULL) {
2730                         DEBUG(1, ("talloc failed\n"));
2731                         return;
2732                 }
2733                 addr = freeit;
2734                 DEBUG(10, ("Stripped /netmask to IP %s\n", addr));
2735         }
2736
2737         for (domain = domain_list(); domain != NULL; domain = domain->next) {
2738                 char sockaddr[INET6_ADDRSTRLEN];
2739
2740                 if (!cli_state_is_connected(domain->conn.cli)) {
2741                         continue;
2742                 }
2743
2744                 client_socket_addr(domain->conn.cli->fd, sockaddr,
2745                                    sizeof(sockaddr));
2746                 if (strequal(sockaddr, addr)) {
2747                         cli_state_disconnect(domain->conn.cli);
2748                 }
2749         }
2750         TALLOC_FREE(freeit);
2751 }