source3/libsmb/dsgetdcname.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    dsgetdcname
   5
   6    Copyright (C) Gerald Carter 2006
   7    Copyright (C) Guenther Deschner 2007-2008
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24
  25 #define DSGETDCNAME_FMT "DSGETDCNAME/DOMAIN/%s"
  26 /* 15 minutes */
  27 #define DSGETDCNAME_CACHE_TTL   60*15
  28
  29 struct ip_service_name {
  30         struct sockaddr_storage ss;
  31         unsigned port;
  32         const char *hostname;
  33 };
  34
  35 static NTSTATUS make_dc_info_from_cldap_reply(TALLOC_CTX *mem_ctx,
  36                                               uint32_t flags,
  37                                               struct sockaddr_storage *ss,
  38                                               uint32_t nt_version,
  39                                               union nbt_cldap_netlogon *r,
  40                                               struct netr_DsRGetDCNameInfo **info);
  41
  42 /****************************************************************
  43 ****************************************************************/
  44
  45 void debug_dsdcinfo_flags(int lvl, uint32_t flags)
  46 {
  47         DEBUG(lvl,("debug_dsdcinfo_flags: 0x%08x\n\t", flags));
  48
  49         if (flags & DS_FORCE_REDISCOVERY)
  50                 DEBUGADD(lvl,("DS_FORCE_REDISCOVERY "));
  51         if (flags & 0x000000002)
  52                 DEBUGADD(lvl,("0x00000002 "));
  53         if (flags & 0x000000004)
  54                 DEBUGADD(lvl,("0x00000004 "));
  55         if (flags & 0x000000008)
  56                 DEBUGADD(lvl,("0x00000008 "));
  57         if (flags & DS_DIRECTORY_SERVICE_REQUIRED)
  58                 DEBUGADD(lvl,("DS_DIRECTORY_SERVICE_REQUIRED "));
  59         if (flags & DS_DIRECTORY_SERVICE_PREFERRED)
  60                 DEBUGADD(lvl,("DS_DIRECTORY_SERVICE_PREFERRED "));
  61         if (flags & DS_GC_SERVER_REQUIRED)
  62                 DEBUGADD(lvl,("DS_GC_SERVER_REQUIRED "));
  63         if (flags & DS_PDC_REQUIRED)
  64                 DEBUGADD(lvl,("DS_PDC_REQUIRED "));
  65         if (flags & DS_BACKGROUND_ONLY)
  66                 DEBUGADD(lvl,("DS_BACKGROUND_ONLY "));
  67         if (flags & DS_IP_REQUIRED)
  68                 DEBUGADD(lvl,("DS_IP_REQUIRED "));
  69         if (flags & DS_KDC_REQUIRED)
  70                 DEBUGADD(lvl,("DS_KDC_REQUIRED "));
  71         if (flags & DS_TIMESERV_REQUIRED)
  72                 DEBUGADD(lvl,("DS_TIMESERV_REQUIRED "));
  73         if (flags & DS_WRITABLE_REQUIRED)
  74                 DEBUGADD(lvl,("DS_WRITABLE_REQUIRED "));
  75         if (flags & DS_GOOD_TIMESERV_PREFERRED)
  76                 DEBUGADD(lvl,("DS_GOOD_TIMESERV_PREFERRED "));
  77         if (flags & DS_AVOID_SELF)
  78                 DEBUGADD(lvl,("DS_AVOID_SELF "));
  79         if (flags & DS_ONLY_LDAP_NEEDED)
  80                 DEBUGADD(lvl,("DS_ONLY_LDAP_NEEDED "));
  81         if (flags & DS_IS_FLAT_NAME)
  82                 DEBUGADD(lvl,("DS_IS_FLAT_NAME "));
  83         if (flags & DS_IS_DNS_NAME)
  84                 DEBUGADD(lvl,("DS_IS_DNS_NAME "));
  85         if (flags & 0x00040000)
  86                 DEBUGADD(lvl,("0x00040000 "));
  87         if (flags & 0x00080000)
  88                 DEBUGADD(lvl,("0x00080000 "));
  89         if (flags & 0x00100000)
  90                 DEBUGADD(lvl,("0x00100000 "));
  91         if (flags & 0x00200000)
  92                 DEBUGADD(lvl,("0x00200000 "));
  93         if (flags & 0x00400000)
  94                 DEBUGADD(lvl,("0x00400000 "));
  95         if (flags & 0x00800000)
  96                 DEBUGADD(lvl,("0x00800000 "));
  97         if (flags & 0x01000000)
  98                 DEBUGADD(lvl,("0x01000000 "));
  99         if (flags & 0x02000000)
 100                 DEBUGADD(lvl,("0x02000000 "));
 101         if (flags & 0x04000000)
 102                 DEBUGADD(lvl,("0x04000000 "));
 103         if (flags & 0x08000000)
 104                 DEBUGADD(lvl,("0x08000000 "));
 105         if (flags & 0x10000000)
 106                 DEBUGADD(lvl,("0x10000000 "));
 107         if (flags & 0x20000000)
 108                 DEBUGADD(lvl,("0x20000000 "));
 109         if (flags & DS_RETURN_DNS_NAME)
 110                 DEBUGADD(lvl,("DS_RETURN_DNS_NAME "));
 111         if (flags & DS_RETURN_FLAT_NAME)
 112                 DEBUGADD(lvl,("DS_RETURN_FLAT_NAME "));
 113         if (flags)
 114                 DEBUGADD(lvl,("\n"));
 115 }
 116
 117 /****************************************************************
 118 ****************************************************************/
 119
 120 static char *dsgetdcname_cache_key(TALLOC_CTX *mem_ctx, const char *domain)
 121 {
 122         if (!mem_ctx || !domain) {
 123                 return NULL;
 124         }
 125
 126         return talloc_asprintf_strupper_m(mem_ctx, DSGETDCNAME_FMT, domain);
 127 }
 128
 129 /****************************************************************
 130 ****************************************************************/
 131
 132 static NTSTATUS dsgetdcname_cache_delete(TALLOC_CTX *mem_ctx,
 133                                         const char *domain_name)
 134 {
 135         char *key;
 136
 137         if (!gencache_init()) {
 138                 return NT_STATUS_INTERNAL_DB_ERROR;
 139         }
 140
 141         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 142         if (!key) {
 143                 return NT_STATUS_NO_MEMORY;
 144         }
 145
 146         if (!gencache_del(key)) {
 147                 return NT_STATUS_UNSUCCESSFUL;
 148         }
 149
 150         return NT_STATUS_OK;
 151 }
 152
 153 /****************************************************************
 154 ****************************************************************/
 155
 156 static NTSTATUS dsgetdcname_cache_store(TALLOC_CTX *mem_ctx,
 157                                         const char *domain_name,
 158                                         const DATA_BLOB *blob)
 159 {
 160         time_t expire_time;
 161         char *key;
 162         bool ret = false;
 163
 164         if (!gencache_init()) {
 165                 return NT_STATUS_INTERNAL_DB_ERROR;
 166         }
 167
 168         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 169         if (!key) {
 170                 return NT_STATUS_NO_MEMORY;
 171         }
 172
 173         expire_time = time(NULL) + DSGETDCNAME_CACHE_TTL;
 174
 175         if (gencache_lock_entry(key) != 0) {
 176                 return NT_STATUS_LOCK_NOT_GRANTED;
 177         }
 178
 179         ret = gencache_set_data_blob(key, blob, expire_time);
 180
 181         gencache_unlock_entry(key);
 182
 183         return ret ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 184 }
 185
 186 /****************************************************************
 187 ****************************************************************/
 188
 189 #define SET_STRING(x) \
 190         talloc_strdup(mem_ctx, x); \
 191         NT_STATUS_HAVE_NO_MEMORY(x);
 192
 193 static NTSTATUS map_logon29_from_cldap_reply(TALLOC_CTX *mem_ctx,
 194                                              uint32_t flags,
 195                                              struct sockaddr_storage *ss,
 196                                              uint32_t nt_version,
 197                                              union nbt_cldap_netlogon *r,
 198                                              struct nbt_cldap_netlogon_29 *p)
 199 {
 200         char addr[INET6_ADDRSTRLEN];
 201
 202         ZERO_STRUCTP(p);
 203
 204         print_sockaddr(addr, sizeof(addr), ss);
 205         p->dc_sock_addr_size = 0x10;
 206         p->dc_sock_addr.sa_family = 2;
 207         p->dc_sock_addr.pdc_ip = talloc_strdup(mem_ctx, addr);
 208
 209         switch (nt_version & 0x000000ff) {
 210                 case 0:
 211                         return NT_STATUS_INVALID_PARAMETER;
 212                 case 1:
 213                         p->pdc_name     = SET_STRING(r->logon1.pdc_name);
 214                         p->domain       = SET_STRING(r->logon1.domain_name);
 215
 216                         if (flags & DS_PDC_REQUIRED) {
 217                                 p->server_type = NBT_SERVER_WRITABLE |
 218                                                  NBT_SERVER_PDC;
 219                         }
 220                         break;
 221                 case 2:
 222                 case 3:
 223                         p->pdc_name     = SET_STRING(r->logon3.pdc_name);
 224                         p->domain       = SET_STRING(r->logon3.domain_name);
 225                         p->pdc_dns_name = SET_STRING(r->logon3.pdc_dns_name);
 226                         p->dns_domain   = SET_STRING(r->logon3.dns_domain);
 227                         p->server_type  = r->logon3.server_type;
 228                         p->forest       = SET_STRING(r->logon3.forest);
 229                         p->domain_uuid  = r->logon3.domain_uuid;
 230
 231                         break;
 232                 case 4:
 233                 case 5:
 234                 case 6:
 235                 case 7:
 236                         p->pdc_name     = SET_STRING(r->logon5.pdc_name);
 237                         p->domain       = SET_STRING(r->logon5.domain);
 238                         p->pdc_dns_name = SET_STRING(r->logon5.pdc_dns_name);
 239                         p->dns_domain   = SET_STRING(r->logon5.dns_domain);
 240                         p->server_type  = r->logon5.server_type;
 241                         p->forest       = SET_STRING(r->logon5.forest);
 242                         p->domain_uuid  = r->logon5.domain_uuid;
 243                         p->server_site  = SET_STRING(r->logon5.server_site);
 244                         p->client_site  = SET_STRING(r->logon5.client_site);
 245
 246                         break;
 247                 case 8:
 248                 case 9:
 249                 case 10:
 250                 case 11:
 251                 case 12:
 252                 case 13:
 253                 case 14:
 254                 case 15:
 255                         p->pdc_name     = SET_STRING(r->logon13.pdc_name);
 256                         p->domain       = SET_STRING(r->logon13.domain);
 257                         p->pdc_dns_name = SET_STRING(r->logon13.pdc_dns_name);
 258                         p->dns_domain   = SET_STRING(r->logon13.dns_domain);
 259                         p->server_type  = r->logon13.server_type;
 260                         p->forest       = SET_STRING(r->logon13.forest);
 261                         p->domain_uuid  = r->logon13.domain_uuid;
 262                         p->server_site  = SET_STRING(r->logon13.server_site);
 263                         p->client_site  = SET_STRING(r->logon13.client_site);
 264
 265                         break;
 266                 default:
 267                         p->pdc_name     = SET_STRING(r->logon29.pdc_name);
 268                         p->domain       = SET_STRING(r->logon29.domain);
 269                         p->pdc_dns_name = SET_STRING(r->logon29.pdc_dns_name);
 270                         p->dns_domain   = SET_STRING(r->logon29.dns_domain);
 271                         p->server_type  = r->logon29.server_type;
 272                         p->forest       = SET_STRING(r->logon29.forest);
 273                         p->domain_uuid  = r->logon29.domain_uuid;
 274                         p->server_site  = SET_STRING(r->logon29.server_site);
 275                         p->client_site  = SET_STRING(r->logon29.client_site);
 276                         p->next_closest_site = SET_STRING(r->logon29.next_closest_site);
 277
 278                         break;
 279         }
 280
 281         return NT_STATUS_OK;
 282 }
 283
 284 /****************************************************************
 285 ****************************************************************/
 286
 287 static NTSTATUS store_cldap_reply(TALLOC_CTX *mem_ctx,
 288                                   uint32_t flags,
 289                                   struct sockaddr_storage *ss,
 290                                   uint32_t nt_version,
 291                                   union nbt_cldap_netlogon *r)
 292 {
 293         DATA_BLOB blob;
 294         enum ndr_err_code ndr_err;
 295         NTSTATUS status;
 296         struct nbt_cldap_netlogon_29 logon29;
 297
 298         status = map_logon29_from_cldap_reply(mem_ctx, flags, ss,
 299                                               nt_version, r, &logon29);
 300         if (!NT_STATUS_IS_OK(status)) {
 301                 return status;
 302         }
 303
 304         ndr_err = ndr_push_struct_blob(&blob, mem_ctx, &logon29,
 305                        (ndr_push_flags_fn_t)ndr_push_nbt_cldap_netlogon_29);
 306         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 307                 return ndr_map_error2ntstatus(ndr_err);
 308         }
 309
 310         if (logon29.domain) {
 311                 status = dsgetdcname_cache_store(mem_ctx, logon29.domain, &blob);
 312                 if (!NT_STATUS_IS_OK(status)) {
 313                         goto done;
 314                 }
 315         }
 316         if (logon29.dns_domain) {
 317                 status = dsgetdcname_cache_store(mem_ctx, logon29.dns_domain, &blob);
 318                 if (!NT_STATUS_IS_OK(status)) {
 319                         goto done;
 320                 }
 321         }
 322
 323  done:
 324         data_blob_free(&blob);
 325
 326         return status;
 327 }
 328
 329 /****************************************************************
 330 ****************************************************************/
 331
 332 static NTSTATUS dsgetdcname_cache_refresh(TALLOC_CTX *mem_ctx,
 333                                           struct messaging_context *msg_ctx,
 334                                           const char *domain_name,
 335                                           struct GUID *domain_guid,
 336                                           uint32_t flags,
 337                                           const char *site_name,
 338                                           struct netr_DsRGetDCNameInfo *info)
 339 {
 340         struct netr_DsRGetDCNameInfo *dc_info;
 341
 342         return dsgetdcname(mem_ctx,
 343                            msg_ctx,
 344                            domain_name,
 345                            domain_guid,
 346                            site_name,
 347                            flags | DS_FORCE_REDISCOVERY,
 348                            &dc_info);
 349 }
 350
 351 /****************************************************************
 352 ****************************************************************/
 353
 354 static uint32_t get_cldap_reply_server_flags(union nbt_cldap_netlogon *r,
 355                                              uint32_t nt_version)
 356 {
 357         switch (nt_version & 0x000000ff) {
 358                 case 0:
 359                 case 1:
 360                         return 0;
 361                 case 2:
 362                 case 3:
 363                         return r->logon3.server_type;
 364                 case 4:
 365                 case 5:
 366                 case 6:
 367                 case 7:
 368                         return r->logon5.server_type;
 369                 case 8:
 370                 case 9:
 371                 case 10:
 372                 case 11:
 373                 case 12:
 374                 case 13:
 375                 case 14:
 376                 case 15:
 377                         return r->logon13.server_type;
 378                 default:
 379                         return r->logon29.server_type;
 380         }
 381 }
 382
 383 /****************************************************************
 384 ****************************************************************/
 385
 386 #define RETURN_ON_FALSE(x) if (!x) return false;
 387
 388 static bool check_cldap_reply_required_flags(uint32_t ret_flags,
 389                                              uint32_t req_flags)
 390 {
 391         if (ret_flags == 0) {
 392                 return true;
 393         }
 394
 395         if (req_flags & DS_PDC_REQUIRED)
 396                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_PDC);
 397
 398         if (req_flags & DS_GC_SERVER_REQUIRED)
 399                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_GC);
 400
 401         if (req_flags & DS_ONLY_LDAP_NEEDED)
 402                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_LDAP);
 403
 404         if ((req_flags & DS_DIRECTORY_SERVICE_REQUIRED) ||
 405             (req_flags & DS_DIRECTORY_SERVICE_PREFERRED))
 406                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_DS);
 407
 408         if (req_flags & DS_KDC_REQUIRED)
 409                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_KDC);
 410
 411         if (req_flags & DS_TIMESERV_REQUIRED)
 412                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_TIMESERV);
 413
 414         if (req_flags & DS_WRITABLE_REQUIRED)
 415                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_WRITABLE);
 416
 417         return true;
 418 }
 419
 420 /****************************************************************
 421 ****************************************************************/
 422
 423 static NTSTATUS dsgetdcname_cache_fetch(TALLOC_CTX *mem_ctx,
 424                                         const char *domain_name,
 425                                         struct GUID *domain_guid,
 426                                         uint32_t flags,
 427                                         const char *site_name,
 428                                         struct netr_DsRGetDCNameInfo **info_p,
 429                                         bool *expired)
 430 {
 431         char *key;
 432         DATA_BLOB blob;
 433         enum ndr_err_code ndr_err;
 434         struct netr_DsRGetDCNameInfo *info;
 435         union nbt_cldap_netlogon p;
 436         struct nbt_cldap_netlogon_29 r;
 437         NTSTATUS status;
 438
 439         if (!gencache_init()) {
 440                 return NT_STATUS_INTERNAL_DB_ERROR;
 441         }
 442
 443         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 444         if (!key) {
 445                 return NT_STATUS_NO_MEMORY;
 446         }
 447
 448         if (!gencache_get_data_blob(key, &blob, expired)) {
 449                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 450         }
 451
 452         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 453         if (!info) {
 454                 return NT_STATUS_NO_MEMORY;
 455         }
 456
 457         ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, &r,
 458                       (ndr_pull_flags_fn_t)ndr_pull_nbt_cldap_netlogon_29);
 459
 460         data_blob_free(&blob);
 461         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 462                 dsgetdcname_cache_delete(mem_ctx, domain_name);
 463                 return ndr_map_error2ntstatus(ndr_err);
 464         }
 465
 466         p.logon29 = r;
 467
 468         status = make_dc_info_from_cldap_reply(mem_ctx, flags, NULL,
 469                                                NETLOGON_VERSION_WITH_CLOSEST_SITE,
 470                                                &p, &info);
 471         if (!NT_STATUS_IS_OK(status)) {
 472                 return status;
 473         }
 474
 475         if (DEBUGLEVEL >= 10) {
 476                 NDR_PRINT_DEBUG(netr_DsRGetDCNameInfo, info);
 477         }
 478
 479         /* check flags */
 480         if (!check_cldap_reply_required_flags(info->dc_flags, flags)) {
 481                 DEBUG(10,("invalid flags\n"));
 482                 return NT_STATUS_INVALID_PARAMETER;
 483         }
 484
 485         if ((flags & DS_IP_REQUIRED) &&
 486             (info->dc_address_type != DS_ADDRESS_TYPE_INET)) {
 487                 return NT_STATUS_INVALID_PARAMETER_MIX;
 488         }
 489
 490         *info_p = info;
 491
 492         return NT_STATUS_OK;
 493 }
 494
 495 /****************************************************************
 496 ****************************************************************/
 497
 498 static NTSTATUS dsgetdcname_cached(TALLOC_CTX *mem_ctx,
 499                                    struct messaging_context *msg_ctx,
 500                                    const char *domain_name,
 501                                    struct GUID *domain_guid,
 502                                    uint32_t flags,
 503                                    const char *site_name,
 504                                    struct netr_DsRGetDCNameInfo **info)
 505 {
 506         NTSTATUS status;
 507         bool expired = false;
 508
 509         status = dsgetdcname_cache_fetch(mem_ctx, domain_name, domain_guid,
 510                                          flags, site_name, info, &expired);
 511         if (!NT_STATUS_IS_OK(status)) {
 512                 DEBUG(10,("dsgetdcname_cached: cache fetch failed with: %s\n",
 513                         nt_errstr(status)));
 514                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 515         }
 516
 517         if (flags & DS_BACKGROUND_ONLY) {
 518                 return status;
 519         }
 520
 521         if (expired) {
 522                 status = dsgetdcname_cache_refresh(mem_ctx, msg_ctx,
 523                                                    domain_name,
 524                                                    domain_guid, flags,
 525                                                    site_name, *info);
 526                 if (!NT_STATUS_IS_OK(status)) {
 527                         return status;
 528                 }
 529         }
 530
 531         return status;
 532 }
 533
 534 /****************************************************************
 535 ****************************************************************/
 536
 537 static bool check_allowed_required_flags(uint32_t flags)
 538 {
 539         uint32_t return_type = flags & (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME);
 540         uint32_t offered_type = flags & (DS_IS_FLAT_NAME|DS_IS_DNS_NAME);
 541         uint32_t query_type = flags & (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY);
 542
 543         /* FIXME: check for DSGETDC_VALID_FLAGS and check for excluse bits
 544          * (DS_PDC_REQUIRED, DS_KDC_REQUIRED, DS_GC_SERVER_REQUIRED) */
 545
 546         debug_dsdcinfo_flags(10, flags);
 547
 548         if (return_type == (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME)) {
 549                 return false;
 550         }
 551
 552         if (offered_type == (DS_IS_DNS_NAME|DS_IS_FLAT_NAME)) {
 553                 return false;
 554         }
 555
 556         if (query_type == (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY)) {
 557                 return false;
 558         }
 559
 560 #if 0
 561         if ((flags & DS_RETURN_DNS_NAME) && (!(flags & DS_IP_REQUIRED))) {
 562                 printf("gd: here5 \n");
 563                 return false;
 564         }
 565 #endif
 566         return true;
 567 }
 568
 569 /****************************************************************
 570 ****************************************************************/
 571
 572 static NTSTATUS discover_dc_netbios(TALLOC_CTX *mem_ctx,
 573                                     const char *domain_name,
 574                                     uint32_t flags,
 575                                     struct ip_service_name **returned_dclist,
 576                                     int *returned_count)
 577 {
 578         NTSTATUS status;
 579         enum nbt_name_type name_type = NBT_NAME_LOGON;
 580         struct ip_service *iplist;
 581         int i;
 582         struct ip_service_name *dclist = NULL;
 583         int count;
 584
 585         *returned_dclist = NULL;
 586         *returned_count = 0;
 587
 588         if (lp_disable_netbios()) {
 589                 return NT_STATUS_NOT_SUPPORTED;
 590         }
 591
 592         if (flags & DS_PDC_REQUIRED) {
 593                 name_type = NBT_NAME_PDC;
 594         }
 595
 596         status = internal_resolve_name(domain_name, name_type, NULL,
 597                                        &iplist, &count,
 598                                        "lmhosts wins bcast");
 599         if (!NT_STATUS_IS_OK(status)) {
 600                 DEBUG(10,("discover_dc_netbios: failed to find DC\n"));
 601                 return status;
 602         }
 603
 604         dclist = TALLOC_ZERO_ARRAY(mem_ctx, struct ip_service_name, count);
 605         if (!dclist) {
 606                 return NT_STATUS_NO_MEMORY;
 607         }
 608
 609         for (i=0; i<count; i++) {
 610
 611                 char addr[INET6_ADDRSTRLEN];
 612                 struct ip_service_name *r = &dclist[i];
 613
 614                 print_sockaddr(addr, sizeof(addr),
 615                                &iplist[i].ss);
 616
 617                 r->ss   = iplist[i].ss;
 618                 r->port = iplist[i].port;
 619                 r->hostname = talloc_strdup(mem_ctx, addr);
 620                 if (!r->hostname) {
 621                         return NT_STATUS_NO_MEMORY;
 622                 }
 623
 624         }
 625
 626         *returned_dclist = dclist;
 627         *returned_count = count;
 628
 629         return NT_STATUS_OK;
 630 }
 631
 632 /****************************************************************
 633 ****************************************************************/
 634
 635 static NTSTATUS discover_dc_dns(TALLOC_CTX *mem_ctx,
 636                                 const char *domain_name,
 637                                 struct GUID *domain_guid,
 638                                 uint32_t flags,
 639                                 const char *site_name,
 640                                 struct ip_service_name **returned_dclist,
 641                                 int *return_count)
 642 {
 643         int i, j;
 644         NTSTATUS status;
 645         struct dns_rr_srv *dcs = NULL;
 646         int numdcs = 0;
 647         int numaddrs = 0;
 648         struct ip_service_name *dclist = NULL;
 649         int count = 0;
 650
 651         if (flags & DS_PDC_REQUIRED) {
 652                 status = ads_dns_query_pdc(mem_ctx, domain_name,
 653                                            &dcs, &numdcs);
 654         } else if (flags & DS_GC_SERVER_REQUIRED) {
 655                 status = ads_dns_query_gcs(mem_ctx, domain_name, site_name,
 656                                            &dcs, &numdcs);
 657         } else if (flags & DS_KDC_REQUIRED) {
 658                 status = ads_dns_query_kdcs(mem_ctx, domain_name, site_name,
 659                                             &dcs, &numdcs);
 660         } else if (flags & DS_DIRECTORY_SERVICE_REQUIRED) {
 661                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 662                                            &dcs, &numdcs);
 663         } else if (domain_guid) {
 664                 status = ads_dns_query_dcs_guid(mem_ctx, domain_name,
 665                                                 domain_guid, &dcs, &numdcs);
 666         } else {
 667                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 668                                            &dcs, &numdcs);
 669         }
 670
 671         if (!NT_STATUS_IS_OK(status)) {
 672                 return status;
 673         }
 674
 675         if (numdcs == 0) {
 676                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 677         }
 678
 679         for (i=0;i<numdcs;i++) {
 680                 numaddrs += MAX(dcs[i].num_ips,1);
 681         }
 682
 683         dclist = TALLOC_ZERO_ARRAY(mem_ctx,
 684                                    struct ip_service_name,
 685                                    numaddrs);
 686         if (!dclist) {
 687                 return NT_STATUS_NO_MEMORY;
 688         }
 689
 690         /* now unroll the list of IP addresses */
 691
 692         *return_count = 0;
 693         i = 0;
 694         j = 0;
 695
 696         while ((i < numdcs) && (count < numaddrs)) {
 697
 698                 struct ip_service_name *r = &dclist[count];
 699
 700                 r->port = dcs[count].port;
 701                 r->hostname = dcs[count].hostname;
 702
 703                 /* If we don't have an IP list for a name, lookup it up */
 704
 705                 if (!dcs[i].ss_s) {
 706                         interpret_string_addr(&r->ss, dcs[i].hostname, 0);
 707                         i++;
 708                         j = 0;
 709                 } else {
 710                         /* use the IP addresses from the SRV sresponse */
 711
 712                         if (j >= dcs[i].num_ips) {
 713                                 i++;
 714                                 j = 0;
 715                                 continue;
 716                         }
 717
 718                         r->ss = dcs[i].ss_s[j];
 719                         j++;
 720                 }
 721
 722                 /* make sure it is a valid IP.  I considered checking the
 723                  * negative connection cache, but this is the wrong place for
 724                  * it.  Maybe only as a hac.  After think about it, if all of
 725                  * the IP addresses retuend from DNS are dead, what hope does a
 726                  * netbios name lookup have?  The standard reason for falling
 727                  * back to netbios lookups is that our DNS server doesn't know
 728                  * anything about the DC's   -- jerry */
 729
 730                 if (!is_zero_addr(&r->ss)) {
 731                         count++;
 732                         continue;
 733                 }
 734         }
 735
 736         *returned_dclist = dclist;
 737         *return_count = count;
 738
 739         if (count > 0) {
 740                 return NT_STATUS_OK;
 741         }
 742
 743         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 744 }
 745
 746 /****************************************************************
 747 ****************************************************************/
 748
 749 static NTSTATUS make_domain_controller_info(TALLOC_CTX *mem_ctx,
 750                                             const char *dc_unc,
 751                                             const char *dc_address,
 752                                             uint32_t dc_address_type,
 753                                             const struct GUID *domain_guid,
 754                                             const char *domain_name,
 755                                             const char *forest_name,
 756                                             uint32_t flags,
 757                                             const char *dc_site_name,
 758                                             const char *client_site_name,
 759                                             struct netr_DsRGetDCNameInfo **info_out)
 760 {
 761         struct netr_DsRGetDCNameInfo *info;
 762
 763         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 764         NT_STATUS_HAVE_NO_MEMORY(info);
 765
 766         if (dc_unc) {
 767                 info->dc_unc = talloc_strdup(mem_ctx, dc_unc);
 768                 NT_STATUS_HAVE_NO_MEMORY(info->dc_unc);
 769         }
 770
 771         if (dc_address) {
 772                 if (!(dc_address[0] == '\\' && dc_address[1] == '\\')) {
 773                         info->dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
 774                                                            dc_address);
 775                 } else {
 776                         info->dc_address = talloc_strdup(mem_ctx, dc_address);
 777                 }
 778                 NT_STATUS_HAVE_NO_MEMORY(info->dc_address);
 779         }
 780
 781         info->dc_address_type = dc_address_type;
 782
 783         if (domain_guid) {
 784                 info->domain_guid = *domain_guid;
 785         }
 786
 787         if (domain_name) {
 788                 info->domain_name = talloc_strdup(mem_ctx, domain_name);
 789                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 790         }
 791
 792         if (forest_name && *forest_name) {
 793                 info->forest_name = talloc_strdup(mem_ctx, forest_name);
 794                 NT_STATUS_HAVE_NO_MEMORY(info->forest_name);
 795                 flags |= DS_DNS_FOREST;
 796         }
 797
 798         info->dc_flags = flags;
 799
 800         if (dc_site_name) {
 801                 info->dc_site_name = talloc_strdup(mem_ctx, dc_site_name);
 802                 NT_STATUS_HAVE_NO_MEMORY(info->dc_site_name);
 803         }
 804
 805         if (client_site_name) {
 806                 info->client_site_name = talloc_strdup(mem_ctx,
 807                                                        client_site_name);
 808                 NT_STATUS_HAVE_NO_MEMORY(info->client_site_name);
 809         }
 810
 811         *info_out = info;
 812
 813         return NT_STATUS_OK;
 814 }
 815
 816 /****************************************************************
 817 ****************************************************************/
 818
 819 static void map_dc_and_domain_names(uint32_t flags,
 820                                     const char *dc_name,
 821                                     const char *domain_name,
 822                                     const char *dns_dc_name,
 823                                     const char *dns_domain_name,
 824                                     uint32_t *dc_flags,
 825                                     const char **hostname_p,
 826                                     const char **domain_p)
 827 {
 828         switch (flags & 0xf0000000) {
 829                 case DS_RETURN_FLAT_NAME:
 830                         if (dc_name && domain_name &&
 831                             *dc_name && *domain_name) {
 832                                 *hostname_p = dc_name;
 833                                 *domain_p = domain_name;
 834                                 break;
 835                         }
 836                 case DS_RETURN_DNS_NAME:
 837                 default:
 838                         if (dns_dc_name && dns_domain_name &&
 839                             *dns_dc_name && *dns_domain_name) {
 840                                 *hostname_p = dns_dc_name;
 841                                 *domain_p = dns_domain_name;
 842                                 *dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
 843                                 break;
 844                         }
 845                         if (dc_name && domain_name &&
 846                             *dc_name && *domain_name) {
 847                                 *hostname_p = dc_name;
 848                                 *domain_p = domain_name;
 849                                 break;
 850                         }
 851         }
 852 }
 853
 854 /****************************************************************
 855 ****************************************************************/
 856
 857 static NTSTATUS make_dc_info_from_cldap_reply(TALLOC_CTX *mem_ctx,
 858                                               uint32_t flags,
 859                                               struct sockaddr_storage *ss,
 860                                               uint32_t nt_version,
 861                                               union nbt_cldap_netlogon *r,
 862                                               struct netr_DsRGetDCNameInfo **info)
 863 {
 864         const char *dc_hostname, *dc_domain_name;
 865         const char *dc_address = NULL;
 866         const char *dc_forest = NULL;
 867         uint32_t dc_address_type = 0;
 868         uint32_t dc_flags = 0;
 869         struct GUID *dc_domain_guid = NULL;
 870         const char *dc_server_site = NULL;
 871         const char *dc_client_site = NULL;
 872
 873         char addr[INET6_ADDRSTRLEN];
 874
 875         if (ss) {
 876                 print_sockaddr(addr, sizeof(addr), ss);
 877                 dc_address = addr;
 878                 dc_address_type = DS_ADDRESS_TYPE_INET;
 879         }
 880
 881         switch (nt_version & 0x000000ff) {
 882                 case 0:
 883                         return NT_STATUS_INVALID_PARAMETER;
 884                 case 1:
 885                         if (!ss) {
 886                                 dc_address      = r->logon1.pdc_name;
 887                                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 888                         }
 889
 890                         map_dc_and_domain_names(flags,
 891                                                 r->logon1.pdc_name,
 892                                                 r->logon1.domain_name,
 893                                                 NULL,
 894                                                 NULL,
 895                                                 &dc_flags,
 896                                                 &dc_hostname,
 897                                                 &dc_domain_name);
 898
 899                         if (flags & DS_PDC_REQUIRED) {
 900                                 dc_flags = NBT_SERVER_WRITABLE | NBT_SERVER_PDC;
 901                         }
 902                         break;
 903                 case 2:
 904                 case 3:
 905                         if (!ss) {
 906                                 dc_address      = r->logon3.pdc_ip;
 907                                 dc_address_type = DS_ADDRESS_TYPE_INET;
 908                         }
 909
 910                         map_dc_and_domain_names(flags,
 911                                                 r->logon3.pdc_name,
 912                                                 r->logon3.domain_name,
 913                                                 r->logon3.pdc_dns_name,
 914                                                 r->logon3.dns_domain,
 915                                                 &dc_flags,
 916                                                 &dc_hostname,
 917                                                 &dc_domain_name);
 918
 919                         dc_flags        |= r->logon3.server_type;
 920                         dc_forest       = r->logon3.forest;
 921                         dc_domain_guid  = &r->logon3.domain_uuid;
 922
 923                         break;
 924                 case 4:
 925                 case 5:
 926                 case 6:
 927                 case 7:
 928                         if (!ss) {
 929                                 dc_address      = r->logon5.pdc_name;
 930                                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 931                         }
 932
 933                         map_dc_and_domain_names(flags,
 934                                                 r->logon5.pdc_name,
 935                                                 r->logon5.domain,
 936                                                 r->logon5.pdc_dns_name,
 937                                                 r->logon5.dns_domain,
 938                                                 &dc_flags,
 939                                                 &dc_hostname,
 940                                                 &dc_domain_name);
 941
 942                         dc_flags        |= r->logon5.server_type;
 943                         dc_forest       = r->logon5.forest;
 944                         dc_domain_guid  = &r->logon5.domain_uuid;
 945                         dc_server_site  = r->logon5.server_site;
 946                         dc_client_site  = r->logon5.client_site;
 947
 948                         break;
 949                 case 8:
 950                 case 9:
 951                 case 10:
 952                 case 11:
 953                 case 12:
 954                 case 13:
 955                 case 14:
 956                 case 15:
 957                         if (!ss) {
 958                                 dc_address      = r->logon13.dc_sock_addr.pdc_ip;
 959                                 dc_address_type = DS_ADDRESS_TYPE_INET;
 960                         }
 961
 962                         map_dc_and_domain_names(flags,
 963                                                 r->logon13.pdc_name,
 964                                                 r->logon13.domain,
 965                                                 r->logon13.pdc_dns_name,
 966                                                 r->logon13.dns_domain,
 967                                                 &dc_flags,
 968                                                 &dc_hostname,
 969                                                 &dc_domain_name);
 970
 971                         dc_flags        |= r->logon13.server_type;
 972                         dc_forest       = r->logon13.forest;
 973                         dc_domain_guid  = &r->logon13.domain_uuid;
 974                         dc_server_site  = r->logon13.server_site;
 975                         dc_client_site  = r->logon13.client_site;
 976
 977                         break;
 978                 default:
 979                         if (!ss) {
 980                                 dc_address      = r->logon29.dc_sock_addr.pdc_ip;
 981                                 dc_address_type = DS_ADDRESS_TYPE_INET;
 982                         }
 983
 984                         map_dc_and_domain_names(flags,
 985                                                 r->logon29.pdc_name,
 986                                                 r->logon29.domain,
 987                                                 r->logon29.pdc_dns_name,
 988                                                 r->logon29.dns_domain,
 989                                                 &dc_flags,
 990                                                 &dc_hostname,
 991                                                 &dc_domain_name);
 992
 993                         dc_flags        |= r->logon29.server_type;
 994                         dc_forest       = r->logon29.forest;
 995                         dc_domain_guid  = &r->logon29.domain_uuid;
 996                         dc_server_site  = r->logon29.server_site;
 997                         dc_client_site  = r->logon29.client_site;
 998
 999                         break;
1000         }
1001
1002         return make_domain_controller_info(mem_ctx,
1003                                            dc_hostname,
1004                                            dc_address,
1005                                            dc_address_type,
1006                                            dc_domain_guid,
1007                                            dc_domain_name,
1008                                            dc_forest,
1009                                            dc_flags,
1010                                            dc_server_site,
1011                                            dc_client_site,
1012                                            info);
1013 }
1014
1015 /****************************************************************
1016 ****************************************************************/
1017
1018 static uint32_t map_ds_flags_to_nt_version(uint32_t flags)
1019 {
1020         uint32_t nt_version = 0;
1021
1022         if (flags & DS_PDC_REQUIRED) {
1023                 nt_version |= NETLOGON_VERSION_PDC;
1024         }
1025
1026         if (flags & DS_GC_SERVER_REQUIRED) {
1027                 nt_version |= NETLOGON_VERSION_GC;
1028         }
1029
1030         if (flags & DS_TRY_NEXTCLOSEST_SITE) {
1031                 nt_version |= NETLOGON_VERSION_WITH_CLOSEST_SITE;
1032         }
1033
1034         if (flags & DS_IP_REQUIRED) {
1035                 nt_version |= NETLOGON_VERSION_IP;
1036         }
1037
1038         return nt_version;
1039 }
1040
1041 /****************************************************************
1042 ****************************************************************/
1043
1044 static NTSTATUS process_dc_dns(TALLOC_CTX *mem_ctx,
1045                                const char *domain_name,
1046                                uint32_t flags,
1047                                struct ip_service_name *dclist,
1048                                int num_dcs,
1049                                struct netr_DsRGetDCNameInfo **info)
1050 {
1051         int i = 0;
1052         bool valid_dc = false;
1053         union nbt_cldap_netlogon *r = NULL;
1054         uint32_t nt_version = NETLOGON_VERSION_5 |
1055                               NETLOGON_VERSION_5EX;
1056         uint32_t ret_flags = 0;
1057         NTSTATUS status;
1058
1059         nt_version |= map_ds_flags_to_nt_version(flags);
1060
1061         for (i=0; i<num_dcs; i++) {
1062
1063                 DEBUG(10,("LDAP ping to %s\n", dclist[i].hostname));
1064
1065                 if (ads_cldap_netlogon(mem_ctx, dclist[i].hostname,
1066                                         domain_name,
1067                                         &nt_version,
1068                                         &r))
1069                 {
1070                         ret_flags = get_cldap_reply_server_flags(r, nt_version);
1071
1072                         if (check_cldap_reply_required_flags(ret_flags, flags)) {
1073                                 valid_dc = true;
1074                                 break;
1075                         }
1076                 }
1077
1078                 continue;
1079         }
1080
1081         if (!valid_dc) {
1082                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1083         }
1084
1085         status = make_dc_info_from_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1086                                                nt_version, r, info);
1087         if (NT_STATUS_IS_OK(status)) {
1088                 return store_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1089                                          nt_version, r);
1090         }
1091
1092         return status;
1093 }
1094
1095 /****************************************************************
1096 ****************************************************************/
1097
1098 static struct event_context *ev_context(void)
1099 {
1100         static struct event_context *ctx;
1101
1102         if (!ctx && !(ctx = event_context_init(NULL))) {
1103                 smb_panic("Could not init event context");
1104         }
1105         return ctx;
1106 }
1107
1108 /****************************************************************
1109 ****************************************************************/
1110
1111 static struct messaging_context *msg_context(TALLOC_CTX *mem_ctx)
1112 {
1113         static struct messaging_context *ctx;
1114
1115         if (!ctx && !(ctx = messaging_init(mem_ctx, server_id_self(),
1116                                            ev_context()))) {
1117                 smb_panic("Could not init messaging context");
1118         }
1119         return ctx;
1120 }
1121
1122 /****************************************************************
1123 ****************************************************************/
1124
1125 static NTSTATUS process_dc_netbios(TALLOC_CTX *mem_ctx,
1126                                    struct messaging_context *msg_ctx,
1127                                    const char *domain_name,
1128                                    uint32_t flags,
1129                                    struct ip_service_name *dclist,
1130                                    int num_dcs,
1131                                    struct netr_DsRGetDCNameInfo **info)
1132 {
1133         struct sockaddr_storage ss;
1134         struct ip_service ip_list;
1135         enum nbt_name_type name_type = NBT_NAME_LOGON;
1136         NTSTATUS status;
1137         int i;
1138         const char *dc_name = NULL;
1139         fstring tmp_dc_name;
1140         union nbt_cldap_netlogon *r = NULL;
1141         uint32_t nt_version = NETLOGON_VERSION_1 |
1142                               NETLOGON_VERSION_5 |
1143                               NETLOGON_VERSION_5EX_WITH_IP;
1144
1145         if (!msg_ctx) {
1146                 msg_ctx = msg_context(mem_ctx);
1147         }
1148
1149         if (flags & DS_PDC_REQUIRED) {
1150                 name_type = NBT_NAME_PDC;
1151         }
1152
1153         nt_version |= map_ds_flags_to_nt_version(flags);
1154
1155         DEBUG(10,("process_dc_netbios\n"));
1156
1157         for (i=0; i<num_dcs; i++) {
1158
1159                 ip_list.ss = dclist[i].ss;
1160                 ip_list.port = 0;
1161
1162                 if (!interpret_string_addr(&ss, dclist[i].hostname, AI_NUMERICHOST)) {
1163                         return NT_STATUS_UNSUCCESSFUL;
1164                 }
1165
1166                 if (send_getdc_request(mem_ctx, msg_ctx,
1167                                        &dclist[i].ss, domain_name,
1168                                        NULL, nt_version))
1169                 {
1170                         int k;
1171                         smb_msleep(300);
1172                         for (k=0; k<5; k++) {
1173                                 if (receive_getdc_response(mem_ctx,
1174                                                            &dclist[i].ss,
1175                                                            domain_name,
1176                                                            &nt_version,
1177                                                            &dc_name,
1178                                                            &r)) {
1179                                         namecache_store(dc_name, NBT_NAME_SERVER, 1, &ip_list);
1180                                         goto make_reply;
1181                                 }
1182                                 smb_msleep(1500);
1183                         }
1184                 }
1185
1186                 if (name_status_find(domain_name,
1187                                      name_type,
1188                                      NBT_NAME_SERVER,
1189                                      &dclist[i].ss,
1190                                      tmp_dc_name))
1191                 {
1192                         struct nbt_cldap_netlogon_1 logon1;
1193
1194                         r = TALLOC_ZERO_P(mem_ctx, union nbt_cldap_netlogon);
1195                         NT_STATUS_HAVE_NO_MEMORY(r);
1196
1197                         ZERO_STRUCT(logon1);
1198
1199                         nt_version = NETLOGON_VERSION_1;
1200
1201                         logon1.nt_version = nt_version;
1202                         logon1.pdc_name = tmp_dc_name;
1203                         logon1.domain_name = talloc_strdup_upper(mem_ctx, domain_name);
1204                         NT_STATUS_HAVE_NO_MEMORY(logon1.domain_name);
1205
1206                         r->logon1 = logon1;
1207
1208                         namecache_store(tmp_dc_name, NBT_NAME_SERVER, 1, &ip_list);
1209
1210                         goto make_reply;
1211                 }
1212         }
1213
1214         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1215
1216  make_reply:
1217
1218         status = make_dc_info_from_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1219                                                nt_version, r, info);
1220         if (NT_STATUS_IS_OK(status)) {
1221                 return store_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1222                                          nt_version, r);
1223         }
1224
1225         return status;
1226 }
1227
1228 /****************************************************************
1229 ****************************************************************/
1230
1231 static NTSTATUS dsgetdcname_rediscover(TALLOC_CTX *mem_ctx,
1232                                        struct messaging_context *msg_ctx,
1233                                        const char *domain_name,
1234                                        struct GUID *domain_guid,
1235                                        uint32_t flags,
1236                                        const char *site_name,
1237                                        struct netr_DsRGetDCNameInfo **info)
1238 {
1239         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1240         struct ip_service_name *dclist = NULL;
1241         int num_dcs;
1242
1243         DEBUG(10,("dsgetdcname_rediscover\n"));
1244
1245         if (flags & DS_IS_FLAT_NAME) {
1246
1247                 status = discover_dc_netbios(mem_ctx, domain_name, flags,
1248                                              &dclist, &num_dcs);
1249                 NT_STATUS_NOT_OK_RETURN(status);
1250
1251                 return process_dc_netbios(mem_ctx, msg_ctx, domain_name, flags,
1252                                           dclist, num_dcs, info);
1253         }
1254
1255         if (flags & DS_IS_DNS_NAME) {
1256
1257                 status = discover_dc_dns(mem_ctx, domain_name, domain_guid,
1258                                          flags, site_name, &dclist, &num_dcs);
1259                 NT_STATUS_NOT_OK_RETURN(status);
1260
1261                 return process_dc_dns(mem_ctx, domain_name, flags,
1262                                       dclist, num_dcs, info);
1263         }
1264
1265         status = discover_dc_dns(mem_ctx, domain_name, domain_guid, flags,
1266                                  site_name, &dclist, &num_dcs);
1267
1268         if (NT_STATUS_IS_OK(status) && num_dcs != 0) {
1269
1270                 status = process_dc_dns(mem_ctx, domain_name, flags, dclist,
1271                                         num_dcs, info);
1272                 if (NT_STATUS_IS_OK(status)) {
1273                         return status;
1274                 }
1275         }
1276
1277         status = discover_dc_netbios(mem_ctx, domain_name, flags, &dclist,
1278                                      &num_dcs);
1279         NT_STATUS_NOT_OK_RETURN(status);
1280
1281         return process_dc_netbios(mem_ctx, msg_ctx, domain_name, flags, dclist,
1282                                   num_dcs, info);
1283 }
1284
1285 /********************************************************************
1286  dsgetdcname.
1287
1288  This will be the only public function here.
1289 ********************************************************************/
1290
1291 NTSTATUS dsgetdcname(TALLOC_CTX *mem_ctx,
1292                      struct messaging_context *msg_ctx,
1293                      const char *domain_name,
1294                      struct GUID *domain_guid,
1295                      const char *site_name,
1296                      uint32_t flags,
1297                      struct netr_DsRGetDCNameInfo **info)
1298 {
1299         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1300         struct netr_DsRGetDCNameInfo *myinfo = NULL;
1301
1302         DEBUG(10,("dsgetdcname: domain_name: %s, "
1303                   "domain_guid: %s, site_name: %s, flags: 0x%08x\n",
1304                   domain_name,
1305                   domain_guid ? GUID_string(mem_ctx, domain_guid) : "(null)",
1306                   site_name, flags));
1307
1308         *info = NULL;
1309
1310         if (!check_allowed_required_flags(flags)) {
1311                 DEBUG(0,("invalid flags specified\n"));
1312                 return NT_STATUS_INVALID_PARAMETER;
1313         }
1314
1315         if (flags & DS_FORCE_REDISCOVERY) {
1316                 goto rediscover;
1317         }
1318
1319         status = dsgetdcname_cached(mem_ctx, msg_ctx, domain_name, domain_guid,
1320                                     flags, site_name, &myinfo);
1321         if (NT_STATUS_IS_OK(status)) {
1322                 *info = myinfo;
1323                 return status;
1324         }
1325
1326         if (flags & DS_BACKGROUND_ONLY) {
1327                 return status;
1328         }
1329
1330  rediscover:
1331         status = dsgetdcname_rediscover(mem_ctx, msg_ctx, domain_name,
1332                                         domain_guid, flags, site_name,
1333                                         &myinfo);
1334
1335         if (NT_STATUS_IS_OK(status)) {
1336                 *info = myinfo;
1337         }
1338
1339         return status;
1340 }