source/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
 206         /* FIXME */
 207         p->dc_sock_addr_size = 0x10; /* the w32 winsock addr size */
 208         p->dc_sock_addr.sa_family = 2; /* AF_INET */
 209         p->dc_sock_addr.pdc_ip = talloc_strdup(mem_ctx, addr);
 210
 211         switch (nt_version & 0x0000001f) {
 212                 case 0:
 213                         return NT_STATUS_INVALID_PARAMETER;
 214                 case 1:
 215                 case 16:
 216                 case 17:
 217                         p->pdc_name     = SET_STRING(r->logon1.pdc_name);
 218                         p->domain       = SET_STRING(r->logon1.domain_name);
 219
 220                         if (flags & DS_PDC_REQUIRED) {
 221                                 p->server_type = NBT_SERVER_WRITABLE |
 222                                                  NBT_SERVER_PDC;
 223                         }
 224                         break;
 225                 case 2:
 226                 case 3:
 227                 case 18:
 228                 case 19:
 229                         p->pdc_name     = SET_STRING(r->logon3.pdc_name);
 230                         p->domain       = SET_STRING(r->logon3.domain_name);
 231                         p->pdc_dns_name = SET_STRING(r->logon3.pdc_dns_name);
 232                         p->dns_domain   = SET_STRING(r->logon3.dns_domain);
 233                         p->server_type  = r->logon3.server_type;
 234                         p->forest       = SET_STRING(r->logon3.forest);
 235                         p->domain_uuid  = r->logon3.domain_uuid;
 236
 237                         break;
 238                 case 4:
 239                 case 5:
 240                 case 6:
 241                 case 7:
 242                         p->pdc_name     = SET_STRING(r->logon5.pdc_name);
 243                         p->domain       = SET_STRING(r->logon5.domain);
 244                         p->pdc_dns_name = SET_STRING(r->logon5.pdc_dns_name);
 245                         p->dns_domain   = SET_STRING(r->logon5.dns_domain);
 246                         p->server_type  = r->logon5.server_type;
 247                         p->forest       = SET_STRING(r->logon5.forest);
 248                         p->domain_uuid  = r->logon5.domain_uuid;
 249                         p->server_site  = SET_STRING(r->logon5.server_site);
 250                         p->client_site  = SET_STRING(r->logon5.client_site);
 251
 252                         break;
 253                 case 8:
 254                 case 9:
 255                 case 10:
 256                 case 11:
 257                 case 12:
 258                 case 13:
 259                 case 14:
 260                 case 15:
 261                         p->pdc_name     = SET_STRING(r->logon13.pdc_name);
 262                         p->domain       = SET_STRING(r->logon13.domain);
 263                         p->pdc_dns_name = SET_STRING(r->logon13.pdc_dns_name);
 264                         p->dns_domain   = SET_STRING(r->logon13.dns_domain);
 265                         p->server_type  = r->logon13.server_type;
 266                         p->forest       = SET_STRING(r->logon13.forest);
 267                         p->domain_uuid  = r->logon13.domain_uuid;
 268                         p->server_site  = SET_STRING(r->logon13.server_site);
 269                         p->client_site  = SET_STRING(r->logon13.client_site);
 270
 271                         break;
 272                 case 20:
 273                 case 21:
 274                 case 22:
 275                 case 23:
 276                 case 24:
 277                 case 25:
 278                 case 26:
 279                 case 27:
 280                 case 28:
 281                         p->pdc_name     = SET_STRING(r->logon15.pdc_name);
 282                         p->domain       = SET_STRING(r->logon15.domain);
 283                         p->pdc_dns_name = SET_STRING(r->logon15.pdc_dns_name);
 284                         p->dns_domain   = SET_STRING(r->logon15.dns_domain);
 285                         p->server_type  = r->logon15.server_type;
 286                         p->forest       = SET_STRING(r->logon15.forest);
 287                         p->domain_uuid  = r->logon15.domain_uuid;
 288                         p->server_site  = SET_STRING(r->logon15.server_site);
 289                         p->client_site  = SET_STRING(r->logon15.client_site);
 290
 291                         break;
 292                 case 29:
 293                 case 30:
 294                 case 31:
 295                         p->pdc_name     = SET_STRING(r->logon29.pdc_name);
 296                         p->domain       = SET_STRING(r->logon29.domain);
 297                         p->pdc_dns_name = SET_STRING(r->logon29.pdc_dns_name);
 298                         p->dns_domain   = SET_STRING(r->logon29.dns_domain);
 299                         p->server_type  = r->logon29.server_type;
 300                         p->forest       = SET_STRING(r->logon29.forest);
 301                         p->domain_uuid  = r->logon29.domain_uuid;
 302                         p->server_site  = SET_STRING(r->logon29.server_site);
 303                         p->client_site  = SET_STRING(r->logon29.client_site);
 304                         p->next_closest_site = SET_STRING(r->logon29.next_closest_site);
 305
 306                         break;
 307                 default:
 308                         return NT_STATUS_INVALID_PARAMETER;
 309         }
 310
 311         return NT_STATUS_OK;
 312 }
 313
 314 /****************************************************************
 315 ****************************************************************/
 316
 317 static NTSTATUS store_cldap_reply(TALLOC_CTX *mem_ctx,
 318                                   uint32_t flags,
 319                                   struct sockaddr_storage *ss,
 320                                   uint32_t nt_version,
 321                                   union nbt_cldap_netlogon *r)
 322 {
 323         DATA_BLOB blob;
 324         enum ndr_err_code ndr_err;
 325         NTSTATUS status;
 326         struct nbt_cldap_netlogon_29 logon29;
 327
 328         status = map_logon29_from_cldap_reply(mem_ctx, flags, ss,
 329                                               nt_version, r, &logon29);
 330         if (!NT_STATUS_IS_OK(status)) {
 331                 return status;
 332         }
 333
 334         ndr_err = ndr_push_struct_blob(&blob, mem_ctx, &logon29,
 335                        (ndr_push_flags_fn_t)ndr_push_nbt_cldap_netlogon_29);
 336         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 337                 return ndr_map_error2ntstatus(ndr_err);
 338         }
 339
 340         if (logon29.domain) {
 341                 status = dsgetdcname_cache_store(mem_ctx, logon29.domain, &blob);
 342                 if (!NT_STATUS_IS_OK(status)) {
 343                         goto done;
 344                 }
 345         }
 346         if (logon29.dns_domain) {
 347                 status = dsgetdcname_cache_store(mem_ctx, logon29.dns_domain, &blob);
 348                 if (!NT_STATUS_IS_OK(status)) {
 349                         goto done;
 350                 }
 351         }
 352
 353  done:
 354         data_blob_free(&blob);
 355
 356         return status;
 357 }
 358
 359 /****************************************************************
 360 ****************************************************************/
 361
 362 static NTSTATUS dsgetdcname_cache_refresh(TALLOC_CTX *mem_ctx,
 363                                           struct messaging_context *msg_ctx,
 364                                           const char *domain_name,
 365                                           struct GUID *domain_guid,
 366                                           uint32_t flags,
 367                                           const char *site_name,
 368                                           struct netr_DsRGetDCNameInfo *info)
 369 {
 370         struct netr_DsRGetDCNameInfo *dc_info;
 371
 372         return dsgetdcname(mem_ctx,
 373                            msg_ctx,
 374                            domain_name,
 375                            domain_guid,
 376                            site_name,
 377                            flags | DS_FORCE_REDISCOVERY,
 378                            &dc_info);
 379 }
 380
 381 /****************************************************************
 382 ****************************************************************/
 383
 384 static uint32_t get_cldap_reply_server_flags(union nbt_cldap_netlogon *r,
 385                                              uint32_t nt_version)
 386 {
 387         switch (nt_version & 0x0000001f) {
 388                 case 0:
 389                 case 1:
 390                 case 16:
 391                 case 17:
 392                         return 0;
 393                 case 2:
 394                 case 3:
 395                 case 18:
 396                 case 19:
 397                         return r->logon3.server_type;
 398                 case 4:
 399                 case 5:
 400                 case 6:
 401                 case 7:
 402                         return r->logon5.server_type;
 403                 case 8:
 404                 case 9:
 405                 case 10:
 406                 case 11:
 407                 case 12:
 408                 case 13:
 409                 case 14:
 410                 case 15:
 411                         return r->logon13.server_type;
 412                 case 20:
 413                 case 21:
 414                 case 22:
 415                 case 23:
 416                 case 24:
 417                 case 25:
 418                 case 26:
 419                 case 27:
 420                 case 28:
 421                         return r->logon15.server_type;
 422                 case 29:
 423                 case 30:
 424                 case 31:
 425                         return r->logon29.server_type;
 426                 default:
 427                         return 0;
 428         }
 429 }
 430
 431 /****************************************************************
 432 ****************************************************************/
 433
 434 #define RETURN_ON_FALSE(x) if (!x) return false;
 435
 436 static bool check_cldap_reply_required_flags(uint32_t ret_flags,
 437                                              uint32_t req_flags)
 438 {
 439         if (ret_flags == 0) {
 440                 return true;
 441         }
 442
 443         if (req_flags & DS_PDC_REQUIRED)
 444                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_PDC);
 445
 446         if (req_flags & DS_GC_SERVER_REQUIRED)
 447                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_GC);
 448
 449         if (req_flags & DS_ONLY_LDAP_NEEDED)
 450                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_LDAP);
 451
 452         if ((req_flags & DS_DIRECTORY_SERVICE_REQUIRED) ||
 453             (req_flags & DS_DIRECTORY_SERVICE_PREFERRED))
 454                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_DS);
 455
 456         if (req_flags & DS_KDC_REQUIRED)
 457                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_KDC);
 458
 459         if (req_flags & DS_TIMESERV_REQUIRED)
 460                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_TIMESERV);
 461
 462         if (req_flags & DS_WRITABLE_REQUIRED)
 463                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_WRITABLE);
 464
 465         return true;
 466 }
 467
 468 /****************************************************************
 469 ****************************************************************/
 470
 471 static NTSTATUS dsgetdcname_cache_fetch(TALLOC_CTX *mem_ctx,
 472                                         const char *domain_name,
 473                                         struct GUID *domain_guid,
 474                                         uint32_t flags,
 475                                         const char *site_name,
 476                                         struct netr_DsRGetDCNameInfo **info_p,
 477                                         bool *expired)
 478 {
 479         char *key;
 480         DATA_BLOB blob;
 481         enum ndr_err_code ndr_err;
 482         struct netr_DsRGetDCNameInfo *info;
 483         union nbt_cldap_netlogon p;
 484         struct nbt_cldap_netlogon_29 r;
 485         NTSTATUS status;
 486
 487         if (!gencache_init()) {
 488                 return NT_STATUS_INTERNAL_DB_ERROR;
 489         }
 490
 491         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 492         if (!key) {
 493                 return NT_STATUS_NO_MEMORY;
 494         }
 495
 496         if (!gencache_get_data_blob(key, &blob, expired)) {
 497                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 498         }
 499
 500         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 501         if (!info) {
 502                 return NT_STATUS_NO_MEMORY;
 503         }
 504
 505         ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, &r,
 506                       (ndr_pull_flags_fn_t)ndr_pull_nbt_cldap_netlogon_29);
 507
 508         data_blob_free(&blob);
 509         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 510                 dsgetdcname_cache_delete(mem_ctx, domain_name);
 511                 return ndr_map_error2ntstatus(ndr_err);
 512         }
 513
 514         p.logon29 = r;
 515
 516         status = make_dc_info_from_cldap_reply(mem_ctx, flags, NULL,
 517                                                29,
 518                                                &p, &info);
 519         if (!NT_STATUS_IS_OK(status)) {
 520                 return status;
 521         }
 522
 523         if (DEBUGLEVEL >= 10) {
 524                 NDR_PRINT_DEBUG(netr_DsRGetDCNameInfo, info);
 525         }
 526
 527         /* check flags */
 528         if (!check_cldap_reply_required_flags(info->dc_flags, flags)) {
 529                 DEBUG(10,("invalid flags\n"));
 530                 return NT_STATUS_INVALID_PARAMETER;
 531         }
 532
 533         if ((flags & DS_IP_REQUIRED) &&
 534             (info->dc_address_type != DS_ADDRESS_TYPE_INET)) {
 535                 return NT_STATUS_INVALID_PARAMETER_MIX;
 536         }
 537
 538         *info_p = info;
 539
 540         return NT_STATUS_OK;
 541 }
 542
 543 /****************************************************************
 544 ****************************************************************/
 545
 546 static NTSTATUS dsgetdcname_cached(TALLOC_CTX *mem_ctx,
 547                                    struct messaging_context *msg_ctx,
 548                                    const char *domain_name,
 549                                    struct GUID *domain_guid,
 550                                    uint32_t flags,
 551                                    const char *site_name,
 552                                    struct netr_DsRGetDCNameInfo **info)
 553 {
 554         NTSTATUS status;
 555         bool expired = false;
 556
 557         status = dsgetdcname_cache_fetch(mem_ctx, domain_name, domain_guid,
 558                                          flags, site_name, info, &expired);
 559         if (!NT_STATUS_IS_OK(status)) {
 560                 DEBUG(10,("dsgetdcname_cached: cache fetch failed with: %s\n",
 561                         nt_errstr(status)));
 562                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 563         }
 564
 565         if (flags & DS_BACKGROUND_ONLY) {
 566                 return status;
 567         }
 568
 569         if (expired) {
 570                 status = dsgetdcname_cache_refresh(mem_ctx, msg_ctx,
 571                                                    domain_name,
 572                                                    domain_guid, flags,
 573                                                    site_name, *info);
 574                 if (!NT_STATUS_IS_OK(status)) {
 575                         return status;
 576                 }
 577         }
 578
 579         return status;
 580 }
 581
 582 /****************************************************************
 583 ****************************************************************/
 584
 585 static bool check_allowed_required_flags(uint32_t flags,
 586                                          const char *site_name)
 587 {
 588         uint32_t return_type = flags & (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME);
 589         uint32_t offered_type = flags & (DS_IS_FLAT_NAME|DS_IS_DNS_NAME);
 590         uint32_t query_type = flags & (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY);
 591
 592         /* FIXME: check for DSGETDC_VALID_FLAGS and check for excluse bits
 593          * (DS_PDC_REQUIRED, DS_KDC_REQUIRED, DS_GC_SERVER_REQUIRED) */
 594
 595         debug_dsdcinfo_flags(10, flags);
 596
 597         if ((flags & DS_TRY_NEXTCLOSEST_SITE) && site_name) {
 598                 return false;
 599         }
 600
 601         if (return_type == (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME)) {
 602                 return false;
 603         }
 604
 605         if (offered_type == (DS_IS_DNS_NAME|DS_IS_FLAT_NAME)) {
 606                 return false;
 607         }
 608
 609         if (query_type == (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY)) {
 610                 return false;
 611         }
 612
 613 #if 0
 614         if ((flags & DS_RETURN_DNS_NAME) && (!(flags & DS_IP_REQUIRED))) {
 615                 printf("gd: here5 \n");
 616                 return false;
 617         }
 618 #endif
 619         return true;
 620 }
 621
 622 /****************************************************************
 623 ****************************************************************/
 624
 625 static NTSTATUS discover_dc_netbios(TALLOC_CTX *mem_ctx,
 626                                     const char *domain_name,
 627                                     uint32_t flags,
 628                                     struct ip_service_name **returned_dclist,
 629                                     int *returned_count)
 630 {
 631         NTSTATUS status;
 632         enum nbt_name_type name_type = NBT_NAME_LOGON;
 633         struct ip_service *iplist;
 634         int i;
 635         struct ip_service_name *dclist = NULL;
 636         int count;
 637
 638         *returned_dclist = NULL;
 639         *returned_count = 0;
 640
 641         if (lp_disable_netbios()) {
 642                 return NT_STATUS_NOT_SUPPORTED;
 643         }
 644
 645         if (flags & DS_PDC_REQUIRED) {
 646                 name_type = NBT_NAME_PDC;
 647         }
 648
 649         status = internal_resolve_name(domain_name, name_type, NULL,
 650                                        &iplist, &count,
 651                                        "lmhosts wins bcast");
 652         if (!NT_STATUS_IS_OK(status)) {
 653                 DEBUG(10,("discover_dc_netbios: failed to find DC\n"));
 654                 return status;
 655         }
 656
 657         dclist = TALLOC_ZERO_ARRAY(mem_ctx, struct ip_service_name, count);
 658         if (!dclist) {
 659                 return NT_STATUS_NO_MEMORY;
 660         }
 661
 662         for (i=0; i<count; i++) {
 663
 664                 char addr[INET6_ADDRSTRLEN];
 665                 struct ip_service_name *r = &dclist[i];
 666
 667                 print_sockaddr(addr, sizeof(addr),
 668                                &iplist[i].ss);
 669
 670                 r->ss   = iplist[i].ss;
 671                 r->port = iplist[i].port;
 672                 r->hostname = talloc_strdup(mem_ctx, addr);
 673                 if (!r->hostname) {
 674                         return NT_STATUS_NO_MEMORY;
 675                 }
 676
 677         }
 678
 679         *returned_dclist = dclist;
 680         *returned_count = count;
 681
 682         return NT_STATUS_OK;
 683 }
 684
 685 /****************************************************************
 686 ****************************************************************/
 687
 688 static NTSTATUS discover_dc_dns(TALLOC_CTX *mem_ctx,
 689                                 const char *domain_name,
 690                                 struct GUID *domain_guid,
 691                                 uint32_t flags,
 692                                 const char *site_name,
 693                                 struct ip_service_name **returned_dclist,
 694                                 int *return_count)
 695 {
 696         int i, j;
 697         NTSTATUS status;
 698         struct dns_rr_srv *dcs = NULL;
 699         int numdcs = 0;
 700         int numaddrs = 0;
 701         struct ip_service_name *dclist = NULL;
 702         int count = 0;
 703
 704         if (flags & DS_PDC_REQUIRED) {
 705                 status = ads_dns_query_pdc(mem_ctx, domain_name,
 706                                            &dcs, &numdcs);
 707         } else if (flags & DS_GC_SERVER_REQUIRED) {
 708                 status = ads_dns_query_gcs(mem_ctx, domain_name, site_name,
 709                                            &dcs, &numdcs);
 710         } else if (flags & DS_KDC_REQUIRED) {
 711                 status = ads_dns_query_kdcs(mem_ctx, domain_name, site_name,
 712                                             &dcs, &numdcs);
 713         } else if (flags & DS_DIRECTORY_SERVICE_REQUIRED) {
 714                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 715                                            &dcs, &numdcs);
 716         } else if (domain_guid) {
 717                 status = ads_dns_query_dcs_guid(mem_ctx, domain_name,
 718                                                 domain_guid, &dcs, &numdcs);
 719         } else {
 720                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 721                                            &dcs, &numdcs);
 722         }
 723
 724         if (!NT_STATUS_IS_OK(status)) {
 725                 return status;
 726         }
 727
 728         if (numdcs == 0) {
 729                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 730         }
 731
 732         for (i=0;i<numdcs;i++) {
 733                 numaddrs += MAX(dcs[i].num_ips,1);
 734         }
 735
 736         dclist = TALLOC_ZERO_ARRAY(mem_ctx,
 737                                    struct ip_service_name,
 738                                    numaddrs);
 739         if (!dclist) {
 740                 return NT_STATUS_NO_MEMORY;
 741         }
 742
 743         /* now unroll the list of IP addresses */
 744
 745         *return_count = 0;
 746         i = 0;
 747         j = 0;
 748
 749         while ((i < numdcs) && (count < numaddrs)) {
 750
 751                 struct ip_service_name *r = &dclist[count];
 752
 753                 r->port = dcs[count].port;
 754                 r->hostname = dcs[count].hostname;
 755
 756                 /* If we don't have an IP list for a name, lookup it up */
 757
 758                 if (!dcs[i].ss_s) {
 759                         interpret_string_addr(&r->ss, dcs[i].hostname, 0);
 760                         i++;
 761                         j = 0;
 762                 } else {
 763                         /* use the IP addresses from the SRV sresponse */
 764
 765                         if (j >= dcs[i].num_ips) {
 766                                 i++;
 767                                 j = 0;
 768                                 continue;
 769                         }
 770
 771                         r->ss = dcs[i].ss_s[j];
 772                         j++;
 773                 }
 774
 775                 /* make sure it is a valid IP.  I considered checking the
 776                  * negative connection cache, but this is the wrong place for
 777                  * it.  Maybe only as a hac.  After think about it, if all of
 778                  * the IP addresses retuend from DNS are dead, what hope does a
 779                  * netbios name lookup have?  The standard reason for falling
 780                  * back to netbios lookups is that our DNS server doesn't know
 781                  * anything about the DC's   -- jerry */
 782
 783                 if (!is_zero_addr(&r->ss)) {
 784                         count++;
 785                         continue;
 786                 }
 787         }
 788
 789         *returned_dclist = dclist;
 790         *return_count = count;
 791
 792         if (count > 0) {
 793                 return NT_STATUS_OK;
 794         }
 795
 796         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 797 }
 798
 799 /****************************************************************
 800 ****************************************************************/
 801
 802 static NTSTATUS make_domain_controller_info(TALLOC_CTX *mem_ctx,
 803                                             const char *dc_unc,
 804                                             const char *dc_address,
 805                                             uint32_t dc_address_type,
 806                                             const struct GUID *domain_guid,
 807                                             const char *domain_name,
 808                                             const char *forest_name,
 809                                             uint32_t flags,
 810                                             const char *dc_site_name,
 811                                             const char *client_site_name,
 812                                             struct netr_DsRGetDCNameInfo **info_out)
 813 {
 814         struct netr_DsRGetDCNameInfo *info;
 815
 816         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 817         NT_STATUS_HAVE_NO_MEMORY(info);
 818
 819         if (dc_unc) {
 820                 info->dc_unc = talloc_strdup(mem_ctx, dc_unc);
 821                 NT_STATUS_HAVE_NO_MEMORY(info->dc_unc);
 822         }
 823
 824         if (dc_address) {
 825                 if (!(dc_address[0] == '\\' && dc_address[1] == '\\')) {
 826                         info->dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
 827                                                            dc_address);
 828                 } else {
 829                         info->dc_address = talloc_strdup(mem_ctx, dc_address);
 830                 }
 831                 NT_STATUS_HAVE_NO_MEMORY(info->dc_address);
 832         }
 833
 834         info->dc_address_type = dc_address_type;
 835
 836         if (domain_guid) {
 837                 info->domain_guid = *domain_guid;
 838         }
 839
 840         if (domain_name) {
 841                 info->domain_name = talloc_strdup(mem_ctx, domain_name);
 842                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 843         }
 844
 845         if (forest_name && *forest_name) {
 846                 info->forest_name = talloc_strdup(mem_ctx, forest_name);
 847                 NT_STATUS_HAVE_NO_MEMORY(info->forest_name);
 848                 flags |= DS_DNS_FOREST;
 849         }
 850
 851         info->dc_flags = flags;
 852
 853         if (dc_site_name) {
 854                 info->dc_site_name = talloc_strdup(mem_ctx, dc_site_name);
 855                 NT_STATUS_HAVE_NO_MEMORY(info->dc_site_name);
 856         }
 857
 858         if (client_site_name) {
 859                 info->client_site_name = talloc_strdup(mem_ctx,
 860                                                        client_site_name);
 861                 NT_STATUS_HAVE_NO_MEMORY(info->client_site_name);
 862         }
 863
 864         *info_out = info;
 865
 866         return NT_STATUS_OK;
 867 }
 868
 869 /****************************************************************
 870 ****************************************************************/
 871
 872 static void map_dc_and_domain_names(uint32_t flags,
 873                                     const char *dc_name,
 874                                     const char *domain_name,
 875                                     const char *dns_dc_name,
 876                                     const char *dns_domain_name,
 877                                     uint32_t *dc_flags,
 878                                     const char **hostname_p,
 879                                     const char **domain_p)
 880 {
 881         switch (flags & 0xf0000000) {
 882                 case DS_RETURN_FLAT_NAME:
 883                         if (dc_name && domain_name &&
 884                             *dc_name && *domain_name) {
 885                                 *hostname_p = dc_name;
 886                                 *domain_p = domain_name;
 887                                 break;
 888                         }
 889                 case DS_RETURN_DNS_NAME:
 890                 default:
 891                         if (dns_dc_name && dns_domain_name &&
 892                             *dns_dc_name && *dns_domain_name) {
 893                                 *hostname_p = dns_dc_name;
 894                                 *domain_p = dns_domain_name;
 895                                 *dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
 896                                 break;
 897                         }
 898                         if (dc_name && domain_name &&
 899                             *dc_name && *domain_name) {
 900                                 *hostname_p = dc_name;
 901                                 *domain_p = domain_name;
 902                                 break;
 903                         }
 904         }
 905 }
 906
 907 /****************************************************************
 908 ****************************************************************/
 909
 910 static NTSTATUS make_dc_info_from_cldap_reply(TALLOC_CTX *mem_ctx,
 911                                               uint32_t flags,
 912                                               struct sockaddr_storage *ss,
 913                                               uint32_t nt_version,
 914                                               union nbt_cldap_netlogon *r,
 915                                               struct netr_DsRGetDCNameInfo **info)
 916 {
 917         const char *dc_hostname, *dc_domain_name;
 918         const char *dc_address = NULL;
 919         const char *dc_forest = NULL;
 920         uint32_t dc_address_type = 0;
 921         uint32_t dc_flags = 0;
 922         struct GUID *dc_domain_guid = NULL;
 923         const char *dc_server_site = NULL;
 924         const char *dc_client_site = NULL;
 925
 926         char addr[INET6_ADDRSTRLEN];
 927
 928         if (ss) {
 929                 print_sockaddr(addr, sizeof(addr), ss);
 930                 dc_address = addr;
 931                 dc_address_type = DS_ADDRESS_TYPE_INET;
 932         }
 933
 934         switch (nt_version & 0x0000001f) {
 935                 case 0:
 936                 case 1:
 937                 case 16:
 938                 case 17:
 939                         if (!ss) {
 940                                 dc_address      = r->logon1.pdc_name;
 941                                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 942                         }
 943
 944                         map_dc_and_domain_names(flags,
 945                                                 r->logon1.pdc_name,
 946                                                 r->logon1.domain_name,
 947                                                 NULL,
 948                                                 NULL,
 949                                                 &dc_flags,
 950                                                 &dc_hostname,
 951                                                 &dc_domain_name);
 952
 953                         if (flags & DS_PDC_REQUIRED) {
 954                                 dc_flags = NBT_SERVER_WRITABLE | NBT_SERVER_PDC;
 955                         }
 956                         break;
 957                 case 2:
 958                 case 3:
 959                 case 18:
 960                 case 19:
 961                         if (!ss) {
 962                                 dc_address      = r->logon3.pdc_ip;
 963                                 dc_address_type = DS_ADDRESS_TYPE_INET;
 964                         }
 965
 966                         map_dc_and_domain_names(flags,
 967                                                 r->logon3.pdc_name,
 968                                                 r->logon3.domain_name,
 969                                                 r->logon3.pdc_dns_name,
 970                                                 r->logon3.dns_domain,
 971                                                 &dc_flags,
 972                                                 &dc_hostname,
 973                                                 &dc_domain_name);
 974
 975                         dc_flags        |= r->logon3.server_type;
 976                         dc_forest       = r->logon3.forest;
 977                         dc_domain_guid  = &r->logon3.domain_uuid;
 978
 979                         break;
 980                 case 4:
 981                 case 5:
 982                 case 6:
 983                 case 7:
 984                         if (!ss) {
 985                                 dc_address      = r->logon5.pdc_name;
 986                                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 987                         }
 988
 989                         map_dc_and_domain_names(flags,
 990                                                 r->logon5.pdc_name,
 991                                                 r->logon5.domain,
 992                                                 r->logon5.pdc_dns_name,
 993                                                 r->logon5.dns_domain,
 994                                                 &dc_flags,
 995                                                 &dc_hostname,
 996                                                 &dc_domain_name);
 997
 998                         dc_flags        |= r->logon5.server_type;
 999                         dc_forest       = r->logon5.forest;
1000                         dc_domain_guid  = &r->logon5.domain_uuid;
1001                         dc_server_site  = r->logon5.server_site;
1002                         dc_client_site  = r->logon5.client_site;
1003
1004                         break;
1005                 case 8:
1006                 case 9:
1007                 case 10:
1008                 case 11:
1009                 case 12:
1010                 case 13:
1011                 case 14:
1012                 case 15:
1013                         if (!ss) {
1014                                 dc_address      = r->logon13.dc_sock_addr.pdc_ip;
1015                                 dc_address_type = DS_ADDRESS_TYPE_INET;
1016                         }
1017
1018                         map_dc_and_domain_names(flags,
1019                                                 r->logon13.pdc_name,
1020                                                 r->logon13.domain,
1021                                                 r->logon13.pdc_dns_name,
1022                                                 r->logon13.dns_domain,
1023                                                 &dc_flags,
1024                                                 &dc_hostname,
1025                                                 &dc_domain_name);
1026
1027                         dc_flags        |= r->logon13.server_type;
1028                         dc_forest       = r->logon13.forest;
1029                         dc_domain_guid  = &r->logon13.domain_uuid;
1030                         dc_server_site  = r->logon13.server_site;
1031                         dc_client_site  = r->logon13.client_site;
1032
1033                         break;
1034                 case 20:
1035                 case 21:
1036                 case 22:
1037                 case 23:
1038                 case 24:
1039                 case 25:
1040                 case 26:
1041                 case 27:
1042                 case 28:
1043                         if (!ss) {
1044                                 dc_address      = r->logon15.pdc_name;
1045                                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
1046                         }
1047
1048                         map_dc_and_domain_names(flags,
1049                                                 r->logon15.pdc_name,
1050                                                 r->logon15.domain,
1051                                                 r->logon15.pdc_dns_name,
1052                                                 r->logon15.dns_domain,
1053                                                 &dc_flags,
1054                                                 &dc_hostname,
1055                                                 &dc_domain_name);
1056
1057                         dc_flags        |= r->logon15.server_type;
1058                         dc_forest       = r->logon15.forest;
1059                         dc_domain_guid  = &r->logon15.domain_uuid;
1060                         dc_server_site  = r->logon15.server_site;
1061                         dc_client_site  = r->logon15.client_site;
1062
1063                         break;
1064                 case 29:
1065                 case 30:
1066                 case 31:
1067                         if (!ss) {
1068                                 dc_address      = r->logon29.dc_sock_addr.pdc_ip;
1069                                 dc_address_type = DS_ADDRESS_TYPE_INET;
1070                         }
1071
1072                         map_dc_and_domain_names(flags,
1073                                                 r->logon29.pdc_name,
1074                                                 r->logon29.domain,
1075                                                 r->logon29.pdc_dns_name,
1076                                                 r->logon29.dns_domain,
1077                                                 &dc_flags,
1078                                                 &dc_hostname,
1079                                                 &dc_domain_name);
1080
1081                         dc_flags        |= r->logon29.server_type;
1082                         dc_forest       = r->logon29.forest;
1083                         dc_domain_guid  = &r->logon29.domain_uuid;
1084                         dc_server_site  = r->logon29.server_site;
1085                         dc_client_site  = r->logon29.client_site;
1086
1087                         break;
1088                 default:
1089                         return NT_STATUS_INVALID_PARAMETER;
1090         }
1091
1092         return make_domain_controller_info(mem_ctx,
1093                                            dc_hostname,
1094                                            dc_address,
1095                                            dc_address_type,
1096                                            dc_domain_guid,
1097                                            dc_domain_name,
1098                                            dc_forest,
1099                                            dc_flags,
1100                                            dc_server_site,
1101                                            dc_client_site,
1102                                            info);
1103 }
1104
1105 /****************************************************************
1106 ****************************************************************/
1107
1108 static uint32_t map_ds_flags_to_nt_version(uint32_t flags)
1109 {
1110         uint32_t nt_version = 0;
1111
1112         if (flags & DS_PDC_REQUIRED) {
1113                 nt_version |= NETLOGON_VERSION_PDC;
1114         }
1115
1116         if (flags & DS_GC_SERVER_REQUIRED) {
1117                 nt_version |= NETLOGON_VERSION_GC;
1118         }
1119
1120         if (flags & DS_TRY_NEXTCLOSEST_SITE) {
1121                 nt_version |= NETLOGON_VERSION_WITH_CLOSEST_SITE;
1122         }
1123
1124         if (flags & DS_IP_REQUIRED) {
1125                 nt_version |= NETLOGON_VERSION_IP;
1126         }
1127
1128         return nt_version;
1129 }
1130
1131 /****************************************************************
1132 ****************************************************************/
1133
1134 static NTSTATUS process_dc_dns(TALLOC_CTX *mem_ctx,
1135                                const char *domain_name,
1136                                uint32_t flags,
1137                                struct ip_service_name *dclist,
1138                                int num_dcs,
1139                                struct netr_DsRGetDCNameInfo **info)
1140 {
1141         int i = 0;
1142         bool valid_dc = false;
1143         union nbt_cldap_netlogon *r = NULL;
1144         uint32_t nt_version = NETLOGON_VERSION_5 |
1145                               NETLOGON_VERSION_5EX;
1146         uint32_t ret_flags = 0;
1147         NTSTATUS status;
1148
1149         nt_version |= map_ds_flags_to_nt_version(flags);
1150
1151         for (i=0; i<num_dcs; i++) {
1152
1153                 DEBUG(10,("LDAP ping to %s\n", dclist[i].hostname));
1154
1155                 if (ads_cldap_netlogon(mem_ctx, dclist[i].hostname,
1156                                         domain_name,
1157                                         &nt_version,
1158                                         &r))
1159                 {
1160                         ret_flags = get_cldap_reply_server_flags(r, nt_version);
1161
1162                         if (check_cldap_reply_required_flags(ret_flags, flags)) {
1163                                 valid_dc = true;
1164                                 break;
1165                         }
1166                 }
1167
1168                 continue;
1169         }
1170
1171         if (!valid_dc) {
1172                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1173         }
1174
1175         status = make_dc_info_from_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1176                                                nt_version, r, info);
1177         if (NT_STATUS_IS_OK(status)) {
1178                 return store_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1179                                          nt_version, r);
1180         }
1181
1182         return status;
1183 }
1184
1185 /****************************************************************
1186 ****************************************************************/
1187
1188 static struct event_context *ev_context(void)
1189 {
1190         static struct event_context *ctx;
1191
1192         if (!ctx && !(ctx = event_context_init(NULL))) {
1193                 smb_panic("Could not init event context");
1194         }
1195         return ctx;
1196 }
1197
1198 /****************************************************************
1199 ****************************************************************/
1200
1201 static struct messaging_context *msg_context(TALLOC_CTX *mem_ctx)
1202 {
1203         static struct messaging_context *ctx;
1204
1205         if (!ctx && !(ctx = messaging_init(mem_ctx, server_id_self(),
1206                                            ev_context()))) {
1207                 smb_panic("Could not init messaging context");
1208         }
1209         return ctx;
1210 }
1211
1212 /****************************************************************
1213 ****************************************************************/
1214
1215 static NTSTATUS process_dc_netbios(TALLOC_CTX *mem_ctx,
1216                                    struct messaging_context *msg_ctx,
1217                                    const char *domain_name,
1218                                    uint32_t flags,
1219                                    struct ip_service_name *dclist,
1220                                    int num_dcs,
1221                                    struct netr_DsRGetDCNameInfo **info)
1222 {
1223         struct sockaddr_storage ss;
1224         struct ip_service ip_list;
1225         enum nbt_name_type name_type = NBT_NAME_LOGON;
1226         NTSTATUS status;
1227         int i;
1228         const char *dc_name = NULL;
1229         fstring tmp_dc_name;
1230         union nbt_cldap_netlogon *r = NULL;
1231         bool store_cache = false;
1232         uint32_t nt_version = NETLOGON_VERSION_1 |
1233                               NETLOGON_VERSION_5 |
1234                               NETLOGON_VERSION_5EX_WITH_IP;
1235
1236         if (!msg_ctx) {
1237                 msg_ctx = msg_context(mem_ctx);
1238         }
1239
1240         if (flags & DS_PDC_REQUIRED) {
1241                 name_type = NBT_NAME_PDC;
1242         }
1243
1244         nt_version |= map_ds_flags_to_nt_version(flags);
1245
1246         DEBUG(10,("process_dc_netbios\n"));
1247
1248         for (i=0; i<num_dcs; i++) {
1249
1250                 ip_list.ss = dclist[i].ss;
1251                 ip_list.port = 0;
1252
1253                 if (!interpret_string_addr(&ss, dclist[i].hostname, AI_NUMERICHOST)) {
1254                         return NT_STATUS_UNSUCCESSFUL;
1255                 }
1256
1257                 if (send_getdc_request(mem_ctx, msg_ctx,
1258                                        &dclist[i].ss, domain_name,
1259                                        NULL, nt_version))
1260                 {
1261                         int k;
1262                         smb_msleep(300);
1263                         for (k=0; k<5; k++) {
1264                                 if (receive_getdc_response(mem_ctx,
1265                                                            &dclist[i].ss,
1266                                                            domain_name,
1267                                                            &nt_version,
1268                                                            &dc_name,
1269                                                            &r)) {
1270                                         store_cache = true;
1271                                         namecache_store(dc_name, NBT_NAME_SERVER, 1, &ip_list);
1272                                         goto make_reply;
1273                                 }
1274                                 smb_msleep(1500);
1275                         }
1276                 }
1277
1278                 if (name_status_find(domain_name,
1279                                      name_type,
1280                                      NBT_NAME_SERVER,
1281                                      &dclist[i].ss,
1282                                      tmp_dc_name))
1283                 {
1284                         struct nbt_cldap_netlogon_1 logon1;
1285
1286                         r = TALLOC_ZERO_P(mem_ctx, union nbt_cldap_netlogon);
1287                         NT_STATUS_HAVE_NO_MEMORY(r);
1288
1289                         ZERO_STRUCT(logon1);
1290
1291                         nt_version = NETLOGON_VERSION_1;
1292
1293                         logon1.nt_version = nt_version;
1294                         logon1.pdc_name = tmp_dc_name;
1295                         logon1.domain_name = talloc_strdup_upper(mem_ctx, domain_name);
1296                         NT_STATUS_HAVE_NO_MEMORY(logon1.domain_name);
1297
1298                         r->logon1 = logon1;
1299
1300                         namecache_store(tmp_dc_name, NBT_NAME_SERVER, 1, &ip_list);
1301
1302                         goto make_reply;
1303                 }
1304         }
1305
1306         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1307
1308  make_reply:
1309
1310         status = make_dc_info_from_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1311                                                nt_version, r, info);
1312         if (NT_STATUS_IS_OK(status) && store_cache) {
1313                 return store_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1314                                          nt_version, r);
1315         }
1316
1317         return status;
1318 }
1319
1320 /****************************************************************
1321 ****************************************************************/
1322
1323 static NTSTATUS dsgetdcname_rediscover(TALLOC_CTX *mem_ctx,
1324                                        struct messaging_context *msg_ctx,
1325                                        const char *domain_name,
1326                                        struct GUID *domain_guid,
1327                                        uint32_t flags,
1328                                        const char *site_name,
1329                                        struct netr_DsRGetDCNameInfo **info)
1330 {
1331         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1332         struct ip_service_name *dclist = NULL;
1333         int num_dcs;
1334
1335         DEBUG(10,("dsgetdcname_rediscover\n"));
1336
1337         if (flags & DS_IS_FLAT_NAME) {
1338
1339                 status = discover_dc_netbios(mem_ctx, domain_name, flags,
1340                                              &dclist, &num_dcs);
1341                 NT_STATUS_NOT_OK_RETURN(status);
1342
1343                 return process_dc_netbios(mem_ctx, msg_ctx, domain_name, flags,
1344                                           dclist, num_dcs, info);
1345         }
1346
1347         if (flags & DS_IS_DNS_NAME) {
1348
1349                 status = discover_dc_dns(mem_ctx, domain_name, domain_guid,
1350                                          flags, site_name, &dclist, &num_dcs);
1351                 NT_STATUS_NOT_OK_RETURN(status);
1352
1353                 return process_dc_dns(mem_ctx, domain_name, flags,
1354                                       dclist, num_dcs, info);
1355         }
1356
1357         status = discover_dc_dns(mem_ctx, domain_name, domain_guid, flags,
1358                                  site_name, &dclist, &num_dcs);
1359
1360         if (NT_STATUS_IS_OK(status) && num_dcs != 0) {
1361
1362                 status = process_dc_dns(mem_ctx, domain_name, flags, dclist,
1363                                         num_dcs, info);
1364                 if (NT_STATUS_IS_OK(status)) {
1365                         return status;
1366                 }
1367         }
1368
1369         status = discover_dc_netbios(mem_ctx, domain_name, flags, &dclist,
1370                                      &num_dcs);
1371         NT_STATUS_NOT_OK_RETURN(status);
1372
1373         return process_dc_netbios(mem_ctx, msg_ctx, domain_name, flags, dclist,
1374                                   num_dcs, info);
1375 }
1376
1377 /********************************************************************
1378  dsgetdcname.
1379
1380  This will be the only public function here.
1381 ********************************************************************/
1382
1383 NTSTATUS dsgetdcname(TALLOC_CTX *mem_ctx,
1384                      struct messaging_context *msg_ctx,
1385                      const char *domain_name,
1386                      struct GUID *domain_guid,
1387                      const char *site_name,
1388                      uint32_t flags,
1389                      struct netr_DsRGetDCNameInfo **info)
1390 {
1391         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1392         struct netr_DsRGetDCNameInfo *myinfo = NULL;
1393
1394         DEBUG(10,("dsgetdcname: domain_name: %s, "
1395                   "domain_guid: %s, site_name: %s, flags: 0x%08x\n",
1396                   domain_name,
1397                   domain_guid ? GUID_string(mem_ctx, domain_guid) : "(null)",
1398                   site_name, flags));
1399
1400         *info = NULL;
1401
1402         if (!check_allowed_required_flags(flags, site_name)) {
1403                 DEBUG(0,("invalid flags specified\n"));
1404                 return NT_STATUS_INVALID_PARAMETER;
1405         }
1406
1407         if (flags & DS_FORCE_REDISCOVERY) {
1408                 goto rediscover;
1409         }
1410
1411         status = dsgetdcname_cached(mem_ctx, msg_ctx, domain_name, domain_guid,
1412                                     flags, site_name, &myinfo);
1413         if (NT_STATUS_IS_OK(status)) {
1414                 *info = myinfo;
1415                 return status;
1416         }
1417
1418         if (flags & DS_BACKGROUND_ONLY) {
1419                 return status;
1420         }
1421
1422  rediscover:
1423         status = dsgetdcname_rediscover(mem_ctx, msg_ctx, domain_name,
1424                                         domain_guid, flags, site_name,
1425                                         &myinfo);
1426
1427         if (NT_STATUS_IS_OK(status)) {
1428                 *info = myinfo;
1429         }
1430
1431         return status;
1432 }