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
 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 {
 587         uint32_t return_type = flags & (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME);
 588         uint32_t offered_type = flags & (DS_IS_FLAT_NAME|DS_IS_DNS_NAME);
 589         uint32_t query_type = flags & (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY);
 590
 591         /* FIXME: check for DSGETDC_VALID_FLAGS and check for excluse bits
 592          * (DS_PDC_REQUIRED, DS_KDC_REQUIRED, DS_GC_SERVER_REQUIRED) */
 593
 594         debug_dsdcinfo_flags(10, flags);
 595
 596         if (return_type == (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME)) {
 597                 return false;
 598         }
 599
 600         if (offered_type == (DS_IS_DNS_NAME|DS_IS_FLAT_NAME)) {
 601                 return false;
 602         }
 603
 604         if (query_type == (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY)) {
 605                 return false;
 606         }
 607
 608 #if 0
 609         if ((flags & DS_RETURN_DNS_NAME) && (!(flags & DS_IP_REQUIRED))) {
 610                 printf("gd: here5 \n");
 611                 return false;
 612         }
 613 #endif
 614         return true;
 615 }
 616
 617 /****************************************************************
 618 ****************************************************************/
 619
 620 static NTSTATUS discover_dc_netbios(TALLOC_CTX *mem_ctx,
 621                                     const char *domain_name,
 622                                     uint32_t flags,
 623                                     struct ip_service_name **returned_dclist,
 624                                     int *returned_count)
 625 {
 626         NTSTATUS status;
 627         enum nbt_name_type name_type = NBT_NAME_LOGON;
 628         struct ip_service *iplist;
 629         int i;
 630         struct ip_service_name *dclist = NULL;
 631         int count;
 632
 633         *returned_dclist = NULL;
 634         *returned_count = 0;
 635
 636         if (lp_disable_netbios()) {
 637                 return NT_STATUS_NOT_SUPPORTED;
 638         }
 639
 640         if (flags & DS_PDC_REQUIRED) {
 641                 name_type = NBT_NAME_PDC;
 642         }
 643
 644         status = internal_resolve_name(domain_name, name_type, NULL,
 645                                        &iplist, &count,
 646                                        "lmhosts wins bcast");
 647         if (!NT_STATUS_IS_OK(status)) {
 648                 DEBUG(10,("discover_dc_netbios: failed to find DC\n"));
 649                 return status;
 650         }
 651
 652         dclist = TALLOC_ZERO_ARRAY(mem_ctx, struct ip_service_name, count);
 653         if (!dclist) {
 654                 return NT_STATUS_NO_MEMORY;
 655         }
 656
 657         for (i=0; i<count; i++) {
 658
 659                 char addr[INET6_ADDRSTRLEN];
 660                 struct ip_service_name *r = &dclist[i];
 661
 662                 print_sockaddr(addr, sizeof(addr),
 663                                &iplist[i].ss);
 664
 665                 r->ss   = iplist[i].ss;
 666                 r->port = iplist[i].port;
 667                 r->hostname = talloc_strdup(mem_ctx, addr);
 668                 if (!r->hostname) {
 669                         return NT_STATUS_NO_MEMORY;
 670                 }
 671
 672         }
 673
 674         *returned_dclist = dclist;
 675         *returned_count = count;
 676
 677         return NT_STATUS_OK;
 678 }
 679
 680 /****************************************************************
 681 ****************************************************************/
 682
 683 static NTSTATUS discover_dc_dns(TALLOC_CTX *mem_ctx,
 684                                 const char *domain_name,
 685                                 struct GUID *domain_guid,
 686                                 uint32_t flags,
 687                                 const char *site_name,
 688                                 struct ip_service_name **returned_dclist,
 689                                 int *return_count)
 690 {
 691         int i, j;
 692         NTSTATUS status;
 693         struct dns_rr_srv *dcs = NULL;
 694         int numdcs = 0;
 695         int numaddrs = 0;
 696         struct ip_service_name *dclist = NULL;
 697         int count = 0;
 698
 699         if (flags & DS_PDC_REQUIRED) {
 700                 status = ads_dns_query_pdc(mem_ctx, domain_name,
 701                                            &dcs, &numdcs);
 702         } else if (flags & DS_GC_SERVER_REQUIRED) {
 703                 status = ads_dns_query_gcs(mem_ctx, domain_name, site_name,
 704                                            &dcs, &numdcs);
 705         } else if (flags & DS_KDC_REQUIRED) {
 706                 status = ads_dns_query_kdcs(mem_ctx, domain_name, site_name,
 707                                             &dcs, &numdcs);
 708         } else if (flags & DS_DIRECTORY_SERVICE_REQUIRED) {
 709                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 710                                            &dcs, &numdcs);
 711         } else if (domain_guid) {
 712                 status = ads_dns_query_dcs_guid(mem_ctx, domain_name,
 713                                                 domain_guid, &dcs, &numdcs);
 714         } else {
 715                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 716                                            &dcs, &numdcs);
 717         }
 718
 719         if (!NT_STATUS_IS_OK(status)) {
 720                 return status;
 721         }
 722
 723         if (numdcs == 0) {
 724                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 725         }
 726
 727         for (i=0;i<numdcs;i++) {
 728                 numaddrs += MAX(dcs[i].num_ips,1);
 729         }
 730
 731         dclist = TALLOC_ZERO_ARRAY(mem_ctx,
 732                                    struct ip_service_name,
 733                                    numaddrs);
 734         if (!dclist) {
 735                 return NT_STATUS_NO_MEMORY;
 736         }
 737
 738         /* now unroll the list of IP addresses */
 739
 740         *return_count = 0;
 741         i = 0;
 742         j = 0;
 743
 744         while ((i < numdcs) && (count < numaddrs)) {
 745
 746                 struct ip_service_name *r = &dclist[count];
 747
 748                 r->port = dcs[count].port;
 749                 r->hostname = dcs[count].hostname;
 750
 751                 /* If we don't have an IP list for a name, lookup it up */
 752
 753                 if (!dcs[i].ss_s) {
 754                         interpret_string_addr(&r->ss, dcs[i].hostname, 0);
 755                         i++;
 756                         j = 0;
 757                 } else {
 758                         /* use the IP addresses from the SRV sresponse */
 759
 760                         if (j >= dcs[i].num_ips) {
 761                                 i++;
 762                                 j = 0;
 763                                 continue;
 764                         }
 765
 766                         r->ss = dcs[i].ss_s[j];
 767                         j++;
 768                 }
 769
 770                 /* make sure it is a valid IP.  I considered checking the
 771                  * negative connection cache, but this is the wrong place for
 772                  * it.  Maybe only as a hac.  After think about it, if all of
 773                  * the IP addresses retuend from DNS are dead, what hope does a
 774                  * netbios name lookup have?  The standard reason for falling
 775                  * back to netbios lookups is that our DNS server doesn't know
 776                  * anything about the DC's   -- jerry */
 777
 778                 if (!is_zero_addr(&r->ss)) {
 779                         count++;
 780                         continue;
 781                 }
 782         }
 783
 784         *returned_dclist = dclist;
 785         *return_count = count;
 786
 787         if (count > 0) {
 788                 return NT_STATUS_OK;
 789         }
 790
 791         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 792 }
 793
 794 /****************************************************************
 795 ****************************************************************/
 796
 797 static NTSTATUS make_domain_controller_info(TALLOC_CTX *mem_ctx,
 798                                             const char *dc_unc,
 799                                             const char *dc_address,
 800                                             uint32_t dc_address_type,
 801                                             const struct GUID *domain_guid,
 802                                             const char *domain_name,
 803                                             const char *forest_name,
 804                                             uint32_t flags,
 805                                             const char *dc_site_name,
 806                                             const char *client_site_name,
 807                                             struct netr_DsRGetDCNameInfo **info_out)
 808 {
 809         struct netr_DsRGetDCNameInfo *info;
 810
 811         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 812         NT_STATUS_HAVE_NO_MEMORY(info);
 813
 814         if (dc_unc) {
 815                 info->dc_unc = talloc_strdup(mem_ctx, dc_unc);
 816                 NT_STATUS_HAVE_NO_MEMORY(info->dc_unc);
 817         }
 818
 819         if (dc_address) {
 820                 if (!(dc_address[0] == '\\' && dc_address[1] == '\\')) {
 821                         info->dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
 822                                                            dc_address);
 823                 } else {
 824                         info->dc_address = talloc_strdup(mem_ctx, dc_address);
 825                 }
 826                 NT_STATUS_HAVE_NO_MEMORY(info->dc_address);
 827         }
 828
 829         info->dc_address_type = dc_address_type;
 830
 831         if (domain_guid) {
 832                 info->domain_guid = *domain_guid;
 833         }
 834
 835         if (domain_name) {
 836                 info->domain_name = talloc_strdup(mem_ctx, domain_name);
 837                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 838         }
 839
 840         if (forest_name && *forest_name) {
 841                 info->forest_name = talloc_strdup(mem_ctx, forest_name);
 842                 NT_STATUS_HAVE_NO_MEMORY(info->forest_name);
 843                 flags |= DS_DNS_FOREST;
 844         }
 845
 846         info->dc_flags = flags;
 847
 848         if (dc_site_name) {
 849                 info->dc_site_name = talloc_strdup(mem_ctx, dc_site_name);
 850                 NT_STATUS_HAVE_NO_MEMORY(info->dc_site_name);
 851         }
 852
 853         if (client_site_name) {
 854                 info->client_site_name = talloc_strdup(mem_ctx,
 855                                                        client_site_name);
 856                 NT_STATUS_HAVE_NO_MEMORY(info->client_site_name);
 857         }
 858
 859         *info_out = info;
 860
 861         return NT_STATUS_OK;
 862 }
 863
 864 /****************************************************************
 865 ****************************************************************/
 866
 867 static void map_dc_and_domain_names(uint32_t flags,
 868                                     const char *dc_name,
 869                                     const char *domain_name,
 870                                     const char *dns_dc_name,
 871                                     const char *dns_domain_name,
 872                                     uint32_t *dc_flags,
 873                                     const char **hostname_p,
 874                                     const char **domain_p)
 875 {
 876         switch (flags & 0xf0000000) {
 877                 case DS_RETURN_FLAT_NAME:
 878                         if (dc_name && domain_name &&
 879                             *dc_name && *domain_name) {
 880                                 *hostname_p = dc_name;
 881                                 *domain_p = domain_name;
 882                                 break;
 883                         }
 884                 case DS_RETURN_DNS_NAME:
 885                 default:
 886                         if (dns_dc_name && dns_domain_name &&
 887                             *dns_dc_name && *dns_domain_name) {
 888                                 *hostname_p = dns_dc_name;
 889                                 *domain_p = dns_domain_name;
 890                                 *dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
 891                                 break;
 892                         }
 893                         if (dc_name && domain_name &&
 894                             *dc_name && *domain_name) {
 895                                 *hostname_p = dc_name;
 896                                 *domain_p = domain_name;
 897                                 break;
 898                         }
 899         }
 900 }
 901
 902 /****************************************************************
 903 ****************************************************************/
 904
 905 static NTSTATUS make_dc_info_from_cldap_reply(TALLOC_CTX *mem_ctx,
 906                                               uint32_t flags,
 907                                               struct sockaddr_storage *ss,
 908                                               uint32_t nt_version,
 909                                               union nbt_cldap_netlogon *r,
 910                                               struct netr_DsRGetDCNameInfo **info)
 911 {
 912         const char *dc_hostname, *dc_domain_name;
 913         const char *dc_address = NULL;
 914         const char *dc_forest = NULL;
 915         uint32_t dc_address_type = 0;
 916         uint32_t dc_flags = 0;
 917         struct GUID *dc_domain_guid = NULL;
 918         const char *dc_server_site = NULL;
 919         const char *dc_client_site = NULL;
 920
 921         char addr[INET6_ADDRSTRLEN];
 922
 923         if (ss) {
 924                 print_sockaddr(addr, sizeof(addr), ss);
 925                 dc_address = addr;
 926                 dc_address_type = DS_ADDRESS_TYPE_INET;
 927         }
 928
 929         switch (nt_version & 0x0000001f) {
 930                 case 0:
 931                 case 1:
 932                 case 16:
 933                 case 17:
 934                         if (!ss) {
 935                                 dc_address      = r->logon1.pdc_name;
 936                                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 937                         }
 938
 939                         map_dc_and_domain_names(flags,
 940                                                 r->logon1.pdc_name,
 941                                                 r->logon1.domain_name,
 942                                                 NULL,
 943                                                 NULL,
 944                                                 &dc_flags,
 945                                                 &dc_hostname,
 946                                                 &dc_domain_name);
 947
 948                         if (flags & DS_PDC_REQUIRED) {
 949                                 dc_flags = NBT_SERVER_WRITABLE | NBT_SERVER_PDC;
 950                         }
 951                         break;
 952                 case 2:
 953                 case 3:
 954                 case 18:
 955                 case 19:
 956                         if (!ss) {
 957                                 dc_address      = r->logon3.pdc_ip;
 958                                 dc_address_type = DS_ADDRESS_TYPE_INET;
 959                         }
 960
 961                         map_dc_and_domain_names(flags,
 962                                                 r->logon3.pdc_name,
 963                                                 r->logon3.domain_name,
 964                                                 r->logon3.pdc_dns_name,
 965                                                 r->logon3.dns_domain,
 966                                                 &dc_flags,
 967                                                 &dc_hostname,
 968                                                 &dc_domain_name);
 969
 970                         dc_flags        |= r->logon3.server_type;
 971                         dc_forest       = r->logon3.forest;
 972                         dc_domain_guid  = &r->logon3.domain_uuid;
 973
 974                         break;
 975                 case 4:
 976                 case 5:
 977                 case 6:
 978                 case 7:
 979                         if (!ss) {
 980                                 dc_address      = r->logon5.pdc_name;
 981                                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 982                         }
 983
 984                         map_dc_and_domain_names(flags,
 985                                                 r->logon5.pdc_name,
 986                                                 r->logon5.domain,
 987                                                 r->logon5.pdc_dns_name,
 988                                                 r->logon5.dns_domain,
 989                                                 &dc_flags,
 990                                                 &dc_hostname,
 991                                                 &dc_domain_name);
 992
 993                         dc_flags        |= r->logon5.server_type;
 994                         dc_forest       = r->logon5.forest;
 995                         dc_domain_guid  = &r->logon5.domain_uuid;
 996                         dc_server_site  = r->logon5.server_site;
 997                         dc_client_site  = r->logon5.client_site;
 998
 999                         break;
1000                 case 8:
1001                 case 9:
1002                 case 10:
1003                 case 11:
1004                 case 12:
1005                 case 13:
1006                 case 14:
1007                 case 15:
1008                         if (!ss) {
1009                                 dc_address      = r->logon13.dc_sock_addr.pdc_ip;
1010                                 dc_address_type = DS_ADDRESS_TYPE_INET;
1011                         }
1012
1013                         map_dc_and_domain_names(flags,
1014                                                 r->logon13.pdc_name,
1015                                                 r->logon13.domain,
1016                                                 r->logon13.pdc_dns_name,
1017                                                 r->logon13.dns_domain,
1018                                                 &dc_flags,
1019                                                 &dc_hostname,
1020                                                 &dc_domain_name);
1021
1022                         dc_flags        |= r->logon13.server_type;
1023                         dc_forest       = r->logon13.forest;
1024                         dc_domain_guid  = &r->logon13.domain_uuid;
1025                         dc_server_site  = r->logon13.server_site;
1026                         dc_client_site  = r->logon13.client_site;
1027
1028                         break;
1029                 case 20:
1030                 case 21:
1031                 case 22:
1032                 case 23:
1033                 case 24:
1034                 case 25:
1035                 case 26:
1036                 case 27:
1037                 case 28:
1038                         if (!ss) {
1039                                 dc_address      = r->logon15.pdc_name;
1040                                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
1041                         }
1042
1043                         map_dc_and_domain_names(flags,
1044                                                 r->logon15.pdc_name,
1045                                                 r->logon15.domain,
1046                                                 r->logon15.pdc_dns_name,
1047                                                 r->logon15.dns_domain,
1048                                                 &dc_flags,
1049                                                 &dc_hostname,
1050                                                 &dc_domain_name);
1051
1052                         dc_flags        |= r->logon15.server_type;
1053                         dc_forest       = r->logon15.forest;
1054                         dc_domain_guid  = &r->logon15.domain_uuid;
1055                         dc_server_site  = r->logon15.server_site;
1056                         dc_client_site  = r->logon15.client_site;
1057
1058                         break;
1059                 case 29:
1060                 case 30:
1061                 case 31:
1062                         if (!ss) {
1063                                 dc_address      = r->logon29.dc_sock_addr.pdc_ip;
1064                                 dc_address_type = DS_ADDRESS_TYPE_INET;
1065                         }
1066
1067                         map_dc_and_domain_names(flags,
1068                                                 r->logon29.pdc_name,
1069                                                 r->logon29.domain,
1070                                                 r->logon29.pdc_dns_name,
1071                                                 r->logon29.dns_domain,
1072                                                 &dc_flags,
1073                                                 &dc_hostname,
1074                                                 &dc_domain_name);
1075
1076                         dc_flags        |= r->logon29.server_type;
1077                         dc_forest       = r->logon29.forest;
1078                         dc_domain_guid  = &r->logon29.domain_uuid;
1079                         dc_server_site  = r->logon29.server_site;
1080                         dc_client_site  = r->logon29.client_site;
1081
1082                         break;
1083                 default:
1084                         return NT_STATUS_INVALID_PARAMETER;
1085         }
1086
1087         return make_domain_controller_info(mem_ctx,
1088                                            dc_hostname,
1089                                            dc_address,
1090                                            dc_address_type,
1091                                            dc_domain_guid,
1092                                            dc_domain_name,
1093                                            dc_forest,
1094                                            dc_flags,
1095                                            dc_server_site,
1096                                            dc_client_site,
1097                                            info);
1098 }
1099
1100 /****************************************************************
1101 ****************************************************************/
1102
1103 static uint32_t map_ds_flags_to_nt_version(uint32_t flags)
1104 {
1105         uint32_t nt_version = 0;
1106
1107         if (flags & DS_PDC_REQUIRED) {
1108                 nt_version |= NETLOGON_VERSION_PDC;
1109         }
1110
1111         if (flags & DS_GC_SERVER_REQUIRED) {
1112                 nt_version |= NETLOGON_VERSION_GC;
1113         }
1114
1115         if (flags & DS_TRY_NEXTCLOSEST_SITE) {
1116                 nt_version |= NETLOGON_VERSION_WITH_CLOSEST_SITE;
1117         }
1118
1119         if (flags & DS_IP_REQUIRED) {
1120                 nt_version |= NETLOGON_VERSION_IP;
1121         }
1122
1123         return nt_version;
1124 }
1125
1126 /****************************************************************
1127 ****************************************************************/
1128
1129 static NTSTATUS process_dc_dns(TALLOC_CTX *mem_ctx,
1130                                const char *domain_name,
1131                                uint32_t flags,
1132                                struct ip_service_name *dclist,
1133                                int num_dcs,
1134                                struct netr_DsRGetDCNameInfo **info)
1135 {
1136         int i = 0;
1137         bool valid_dc = false;
1138         union nbt_cldap_netlogon *r = NULL;
1139         uint32_t nt_version = NETLOGON_VERSION_5 |
1140                               NETLOGON_VERSION_5EX;
1141         uint32_t ret_flags = 0;
1142         NTSTATUS status;
1143
1144         nt_version |= map_ds_flags_to_nt_version(flags);
1145
1146         for (i=0; i<num_dcs; i++) {
1147
1148                 DEBUG(10,("LDAP ping to %s\n", dclist[i].hostname));
1149
1150                 if (ads_cldap_netlogon(mem_ctx, dclist[i].hostname,
1151                                         domain_name,
1152                                         &nt_version,
1153                                         &r))
1154                 {
1155                         ret_flags = get_cldap_reply_server_flags(r, nt_version);
1156
1157                         if (check_cldap_reply_required_flags(ret_flags, flags)) {
1158                                 valid_dc = true;
1159                                 break;
1160                         }
1161                 }
1162
1163                 continue;
1164         }
1165
1166         if (!valid_dc) {
1167                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1168         }
1169
1170         status = make_dc_info_from_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1171                                                nt_version, r, info);
1172         if (NT_STATUS_IS_OK(status)) {
1173                 return store_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1174                                          nt_version, r);
1175         }
1176
1177         return status;
1178 }
1179
1180 /****************************************************************
1181 ****************************************************************/
1182
1183 static struct event_context *ev_context(void)
1184 {
1185         static struct event_context *ctx;
1186
1187         if (!ctx && !(ctx = event_context_init(NULL))) {
1188                 smb_panic("Could not init event context");
1189         }
1190         return ctx;
1191 }
1192
1193 /****************************************************************
1194 ****************************************************************/
1195
1196 static struct messaging_context *msg_context(TALLOC_CTX *mem_ctx)
1197 {
1198         static struct messaging_context *ctx;
1199
1200         if (!ctx && !(ctx = messaging_init(mem_ctx, server_id_self(),
1201                                            ev_context()))) {
1202                 smb_panic("Could not init messaging context");
1203         }
1204         return ctx;
1205 }
1206
1207 /****************************************************************
1208 ****************************************************************/
1209
1210 static NTSTATUS process_dc_netbios(TALLOC_CTX *mem_ctx,
1211                                    struct messaging_context *msg_ctx,
1212                                    const char *domain_name,
1213                                    uint32_t flags,
1214                                    struct ip_service_name *dclist,
1215                                    int num_dcs,
1216                                    struct netr_DsRGetDCNameInfo **info)
1217 {
1218         struct sockaddr_storage ss;
1219         struct ip_service ip_list;
1220         enum nbt_name_type name_type = NBT_NAME_LOGON;
1221         NTSTATUS status;
1222         int i;
1223         const char *dc_name = NULL;
1224         fstring tmp_dc_name;
1225         union nbt_cldap_netlogon *r = NULL;
1226         uint32_t nt_version = NETLOGON_VERSION_1 |
1227                               NETLOGON_VERSION_5 |
1228                               NETLOGON_VERSION_5EX_WITH_IP;
1229
1230         if (!msg_ctx) {
1231                 msg_ctx = msg_context(mem_ctx);
1232         }
1233
1234         if (flags & DS_PDC_REQUIRED) {
1235                 name_type = NBT_NAME_PDC;
1236         }
1237
1238         nt_version |= map_ds_flags_to_nt_version(flags);
1239
1240         DEBUG(10,("process_dc_netbios\n"));
1241
1242         for (i=0; i<num_dcs; i++) {
1243
1244                 ip_list.ss = dclist[i].ss;
1245                 ip_list.port = 0;
1246
1247                 if (!interpret_string_addr(&ss, dclist[i].hostname, AI_NUMERICHOST)) {
1248                         return NT_STATUS_UNSUCCESSFUL;
1249                 }
1250
1251                 if (send_getdc_request(mem_ctx, msg_ctx,
1252                                        &dclist[i].ss, domain_name,
1253                                        NULL, nt_version))
1254                 {
1255                         int k;
1256                         smb_msleep(300);
1257                         for (k=0; k<5; k++) {
1258                                 if (receive_getdc_response(mem_ctx,
1259                                                            &dclist[i].ss,
1260                                                            domain_name,
1261                                                            &nt_version,
1262                                                            &dc_name,
1263                                                            &r)) {
1264                                         namecache_store(dc_name, NBT_NAME_SERVER, 1, &ip_list);
1265                                         goto make_reply;
1266                                 }
1267                                 smb_msleep(1500);
1268                         }
1269                 }
1270
1271                 if (name_status_find(domain_name,
1272                                      name_type,
1273                                      NBT_NAME_SERVER,
1274                                      &dclist[i].ss,
1275                                      tmp_dc_name))
1276                 {
1277                         struct nbt_cldap_netlogon_1 logon1;
1278
1279                         r = TALLOC_ZERO_P(mem_ctx, union nbt_cldap_netlogon);
1280                         NT_STATUS_HAVE_NO_MEMORY(r);
1281
1282                         ZERO_STRUCT(logon1);
1283
1284                         nt_version = NETLOGON_VERSION_1;
1285
1286                         logon1.nt_version = nt_version;
1287                         logon1.pdc_name = tmp_dc_name;
1288                         logon1.domain_name = talloc_strdup_upper(mem_ctx, domain_name);
1289                         NT_STATUS_HAVE_NO_MEMORY(logon1.domain_name);
1290
1291                         r->logon1 = logon1;
1292
1293                         namecache_store(tmp_dc_name, NBT_NAME_SERVER, 1, &ip_list);
1294
1295                         goto make_reply;
1296                 }
1297         }
1298
1299         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1300
1301  make_reply:
1302
1303         status = make_dc_info_from_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1304                                                nt_version, r, info);
1305         if (NT_STATUS_IS_OK(status)) {
1306                 return store_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1307                                          nt_version, r);
1308         }
1309
1310         return status;
1311 }
1312
1313 /****************************************************************
1314 ****************************************************************/
1315
1316 static NTSTATUS dsgetdcname_rediscover(TALLOC_CTX *mem_ctx,
1317                                        struct messaging_context *msg_ctx,
1318                                        const char *domain_name,
1319                                        struct GUID *domain_guid,
1320                                        uint32_t flags,
1321                                        const char *site_name,
1322                                        struct netr_DsRGetDCNameInfo **info)
1323 {
1324         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1325         struct ip_service_name *dclist = NULL;
1326         int num_dcs;
1327
1328         DEBUG(10,("dsgetdcname_rediscover\n"));
1329
1330         if (flags & DS_IS_FLAT_NAME) {
1331
1332                 status = discover_dc_netbios(mem_ctx, domain_name, flags,
1333                                              &dclist, &num_dcs);
1334                 NT_STATUS_NOT_OK_RETURN(status);
1335
1336                 return process_dc_netbios(mem_ctx, msg_ctx, domain_name, flags,
1337                                           dclist, num_dcs, info);
1338         }
1339
1340         if (flags & DS_IS_DNS_NAME) {
1341
1342                 status = discover_dc_dns(mem_ctx, domain_name, domain_guid,
1343                                          flags, site_name, &dclist, &num_dcs);
1344                 NT_STATUS_NOT_OK_RETURN(status);
1345
1346                 return process_dc_dns(mem_ctx, domain_name, flags,
1347                                       dclist, num_dcs, info);
1348         }
1349
1350         status = discover_dc_dns(mem_ctx, domain_name, domain_guid, flags,
1351                                  site_name, &dclist, &num_dcs);
1352
1353         if (NT_STATUS_IS_OK(status) && num_dcs != 0) {
1354
1355                 status = process_dc_dns(mem_ctx, domain_name, flags, dclist,
1356                                         num_dcs, info);
1357                 if (NT_STATUS_IS_OK(status)) {
1358                         return status;
1359                 }
1360         }
1361
1362         status = discover_dc_netbios(mem_ctx, domain_name, flags, &dclist,
1363                                      &num_dcs);
1364         NT_STATUS_NOT_OK_RETURN(status);
1365
1366         return process_dc_netbios(mem_ctx, msg_ctx, domain_name, flags, dclist,
1367                                   num_dcs, info);
1368 }
1369
1370 /********************************************************************
1371  dsgetdcname.
1372
1373  This will be the only public function here.
1374 ********************************************************************/
1375
1376 NTSTATUS dsgetdcname(TALLOC_CTX *mem_ctx,
1377                      struct messaging_context *msg_ctx,
1378                      const char *domain_name,
1379                      struct GUID *domain_guid,
1380                      const char *site_name,
1381                      uint32_t flags,
1382                      struct netr_DsRGetDCNameInfo **info)
1383 {
1384         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1385         struct netr_DsRGetDCNameInfo *myinfo = NULL;
1386
1387         DEBUG(10,("dsgetdcname: domain_name: %s, "
1388                   "domain_guid: %s, site_name: %s, flags: 0x%08x\n",
1389                   domain_name,
1390                   domain_guid ? GUID_string(mem_ctx, domain_guid) : "(null)",
1391                   site_name, flags));
1392
1393         *info = NULL;
1394
1395         if (!check_allowed_required_flags(flags)) {
1396                 DEBUG(0,("invalid flags specified\n"));
1397                 return NT_STATUS_INVALID_PARAMETER;
1398         }
1399
1400         if (flags & DS_FORCE_REDISCOVERY) {
1401                 goto rediscover;
1402         }
1403
1404         status = dsgetdcname_cached(mem_ctx, msg_ctx, domain_name, domain_guid,
1405                                     flags, site_name, &myinfo);
1406         if (NT_STATUS_IS_OK(status)) {
1407                 *info = myinfo;
1408                 return status;
1409         }
1410
1411         if (flags & DS_BACKGROUND_ONLY) {
1412                 return status;
1413         }
1414
1415  rediscover:
1416         status = dsgetdcname_rediscover(mem_ctx, msg_ctx, domain_name,
1417                                         domain_guid, flags, site_name,
1418                                         &myinfo);
1419
1420         if (NT_STATUS_IS_OK(status)) {
1421                 *info = myinfo;
1422         }
1423
1424         return status;
1425 }