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 /****************************************************************
  36 ****************************************************************/
  37
  38 void debug_dsdcinfo_flags(int lvl, uint32_t flags)
  39 {
  40         DEBUG(lvl,("debug_dsdcinfo_flags: 0x%08x\n\t", flags));
  41
  42         if (flags & DS_FORCE_REDISCOVERY)
  43                 DEBUGADD(lvl,("DS_FORCE_REDISCOVERY "));
  44         if (flags & 0x000000002)
  45                 DEBUGADD(lvl,("0x00000002 "));
  46         if (flags & 0x000000004)
  47                 DEBUGADD(lvl,("0x00000004 "));
  48         if (flags & 0x000000008)
  49                 DEBUGADD(lvl,("0x00000008 "));
  50         if (flags & DS_DIRECTORY_SERVICE_REQUIRED)
  51                 DEBUGADD(lvl,("DS_DIRECTORY_SERVICE_REQUIRED "));
  52         if (flags & DS_DIRECTORY_SERVICE_PREFERRED)
  53                 DEBUGADD(lvl,("DS_DIRECTORY_SERVICE_PREFERRED "));
  54         if (flags & DS_GC_SERVER_REQUIRED)
  55                 DEBUGADD(lvl,("DS_GC_SERVER_REQUIRED "));
  56         if (flags & DS_PDC_REQUIRED)
  57                 DEBUGADD(lvl,("DS_PDC_REQUIRED "));
  58         if (flags & DS_BACKGROUND_ONLY)
  59                 DEBUGADD(lvl,("DS_BACKGROUND_ONLY "));
  60         if (flags & DS_IP_REQUIRED)
  61                 DEBUGADD(lvl,("DS_IP_REQUIRED "));
  62         if (flags & DS_KDC_REQUIRED)
  63                 DEBUGADD(lvl,("DS_KDC_REQUIRED "));
  64         if (flags & DS_TIMESERV_REQUIRED)
  65                 DEBUGADD(lvl,("DS_TIMESERV_REQUIRED "));
  66         if (flags & DS_WRITABLE_REQUIRED)
  67                 DEBUGADD(lvl,("DS_WRITABLE_REQUIRED "));
  68         if (flags & DS_GOOD_TIMESERV_PREFERRED)
  69                 DEBUGADD(lvl,("DS_GOOD_TIMESERV_PREFERRED "));
  70         if (flags & DS_AVOID_SELF)
  71                 DEBUGADD(lvl,("DS_AVOID_SELF "));
  72         if (flags & DS_ONLY_LDAP_NEEDED)
  73                 DEBUGADD(lvl,("DS_ONLY_LDAP_NEEDED "));
  74         if (flags & DS_IS_FLAT_NAME)
  75                 DEBUGADD(lvl,("DS_IS_FLAT_NAME "));
  76         if (flags & DS_IS_DNS_NAME)
  77                 DEBUGADD(lvl,("DS_IS_DNS_NAME "));
  78         if (flags & 0x00040000)
  79                 DEBUGADD(lvl,("0x00040000 "));
  80         if (flags & 0x00080000)
  81                 DEBUGADD(lvl,("0x00080000 "));
  82         if (flags & 0x00100000)
  83                 DEBUGADD(lvl,("0x00100000 "));
  84         if (flags & 0x00200000)
  85                 DEBUGADD(lvl,("0x00200000 "));
  86         if (flags & 0x00400000)
  87                 DEBUGADD(lvl,("0x00400000 "));
  88         if (flags & 0x00800000)
  89                 DEBUGADD(lvl,("0x00800000 "));
  90         if (flags & 0x01000000)
  91                 DEBUGADD(lvl,("0x01000000 "));
  92         if (flags & 0x02000000)
  93                 DEBUGADD(lvl,("0x02000000 "));
  94         if (flags & 0x04000000)
  95                 DEBUGADD(lvl,("0x04000000 "));
  96         if (flags & 0x08000000)
  97                 DEBUGADD(lvl,("0x08000000 "));
  98         if (flags & 0x10000000)
  99                 DEBUGADD(lvl,("0x10000000 "));
 100         if (flags & 0x20000000)
 101                 DEBUGADD(lvl,("0x20000000 "));
 102         if (flags & DS_RETURN_DNS_NAME)
 103                 DEBUGADD(lvl,("DS_RETURN_DNS_NAME "));
 104         if (flags & DS_RETURN_FLAT_NAME)
 105                 DEBUGADD(lvl,("DS_RETURN_FLAT_NAME "));
 106         if (flags)
 107                 DEBUGADD(lvl,("\n"));
 108 }
 109
 110 /*********************************************************************
 111  ********************************************************************/
 112
 113 static int pack_dsdcinfo(struct netr_DsRGetDCNameInfo *info,
 114                          unsigned char **buf)
 115 {
 116         unsigned char *buffer = NULL;
 117         int len = 0;
 118         int buflen = 0;
 119         UUID_FLAT guid_flat;
 120
 121         DEBUG(10,("pack_dsdcinfo: Packing dsdcinfo\n"));
 122
 123         ZERO_STRUCT(guid_flat);
 124
 125         if (!GUID_all_zero(&info->domain_guid)) {
 126                 smb_uuid_pack(info->domain_guid, &guid_flat);
 127         }
 128
 129  again:
 130         len = 0;
 131
 132         if (buflen > 0) {
 133                 DEBUG(10,("pack_dsdcinfo: Packing domain %s (%s)\n",
 134                           info->domain_name, info->dc_unc));
 135         }
 136
 137         len += tdb_pack(buffer+len, buflen-len, "ffdBffdff",
 138                         info->dc_unc,
 139                         info->dc_address,
 140                         info->dc_address_type,
 141                         UUID_FLAT_SIZE, guid_flat.info,
 142                         info->domain_name,
 143                         info->forest_name,
 144                         info->dc_flags,
 145                         info->dc_site_name,
 146                         info->client_site_name);
 147
 148         if (buflen < len) {
 149                 SAFE_FREE(buffer);
 150                 if ((buffer = SMB_MALLOC_ARRAY(unsigned char, len)) == NULL ) {
 151                         DEBUG(0,("pack_dsdcinfo: failed to alloc buffer!\n"));
 152                         buflen = -1;
 153                         goto done;
 154                 }
 155                 buflen = len;
 156                 goto again;
 157         }
 158
 159         *buf = buffer;
 160
 161  done:
 162         return buflen;
 163 }
 164
 165 /*********************************************************************
 166  ********************************************************************/
 167
 168 static NTSTATUS unpack_dsdcinfo(TALLOC_CTX *mem_ctx,
 169                                 unsigned char *buf,
 170                                 int buflen,
 171                                 struct netr_DsRGetDCNameInfo **info_ret)
 172 {
 173         int len = 0;
 174         struct netr_DsRGetDCNameInfo *info = NULL;
 175         uint32_t guid_len = 0;
 176         unsigned char *guid_buf = NULL;
 177         UUID_FLAT guid_flat;
 178
 179         /* forgive me 6 times */
 180         fstring dc_unc;
 181         fstring dc_address;
 182         fstring domain_name;
 183         fstring forest_name;
 184         fstring dc_site_name;
 185         fstring client_site_name;
 186
 187         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 188         NT_STATUS_HAVE_NO_MEMORY(info);
 189
 190         len += tdb_unpack(buf+len, buflen-len, "ffdBffdff",
 191                           &dc_unc,
 192                           &dc_address,
 193                           &info->dc_address_type,
 194                           &guid_len, &guid_buf,
 195                           &domain_name,
 196                           &forest_name,
 197                           &info->dc_flags,
 198                           &dc_site_name,
 199                           &client_site_name);
 200         if (len == -1) {
 201                 DEBUG(5,("unpack_dsdcinfo: Failed to unpack domain\n"));
 202                 goto failed;
 203         }
 204
 205         info->dc_unc =
 206                 talloc_strdup(mem_ctx, dc_unc);
 207         info->dc_address =
 208                 talloc_strdup(mem_ctx, dc_address);
 209         info->domain_name =
 210                 talloc_strdup(mem_ctx, domain_name);
 211         info->forest_name =
 212                 talloc_strdup(mem_ctx, forest_name);
 213         info->dc_site_name =
 214                 talloc_strdup(mem_ctx, dc_site_name);
 215         info->client_site_name =
 216                 talloc_strdup(mem_ctx, client_site_name);
 217
 218         if (!info->dc_unc ||
 219             !info->dc_address ||
 220             !info->domain_name ||
 221             !info->forest_name ||
 222             !info->dc_site_name ||
 223             !info->client_site_name) {
 224                 goto failed;
 225         }
 226
 227         if (guid_len > 0) {
 228                 struct GUID guid;
 229
 230                 if (guid_len != UUID_FLAT_SIZE) {
 231                         goto failed;
 232                 }
 233
 234                 memcpy(&guid_flat.info, guid_buf, guid_len);
 235                 smb_uuid_unpack(guid_flat, &guid);
 236
 237                 info->domain_guid = guid;
 238                 SAFE_FREE(guid_buf);
 239         }
 240
 241         DEBUG(10,("unpack_dcscinfo: Unpacked domain %s (%s)\n",
 242                   info->domain_name, info->dc_unc));
 243
 244         *info_ret = info;
 245
 246         return NT_STATUS_OK;
 247
 248  failed:
 249         TALLOC_FREE(info);
 250         SAFE_FREE(guid_buf);
 251         return NT_STATUS_NO_MEMORY;
 252 }
 253
 254 /****************************************************************
 255 ****************************************************************/
 256
 257 static char *dsgetdcname_cache_key(TALLOC_CTX *mem_ctx, const char *domain)
 258 {
 259         if (!mem_ctx || !domain) {
 260                 return NULL;
 261         }
 262
 263         return talloc_asprintf_strupper_m(mem_ctx, DSGETDCNAME_FMT, domain);
 264 }
 265
 266 /****************************************************************
 267 ****************************************************************/
 268
 269 static NTSTATUS dsgetdcname_cache_delete(TALLOC_CTX *mem_ctx,
 270                                         const char *domain_name)
 271 {
 272         char *key;
 273
 274         if (!gencache_init()) {
 275                 return NT_STATUS_INTERNAL_DB_ERROR;
 276         }
 277
 278         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 279         if (!key) {
 280                 return NT_STATUS_NO_MEMORY;
 281         }
 282
 283         if (!gencache_del(key)) {
 284                 return NT_STATUS_UNSUCCESSFUL;
 285         }
 286
 287         return NT_STATUS_OK;
 288 }
 289
 290 /****************************************************************
 291 ****************************************************************/
 292
 293 static NTSTATUS dsgetdcname_cache_store(TALLOC_CTX *mem_ctx,
 294                                         const char *domain_name,
 295                                         struct netr_DsRGetDCNameInfo *info)
 296 {
 297         time_t expire_time;
 298         char *key;
 299         bool ret = false;
 300         DATA_BLOB blob;
 301         enum ndr_err_code ndr_err;
 302
 303         if (!gencache_init()) {
 304                 return NT_STATUS_INTERNAL_DB_ERROR;
 305         }
 306
 307         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 308         if (!key) {
 309                 return NT_STATUS_NO_MEMORY;
 310         }
 311
 312         expire_time = time(NULL) + DSGETDCNAME_CACHE_TTL;
 313
 314         ndr_err = ndr_push_struct_blob(&blob, mem_ctx, info,
 315                        (ndr_push_flags_fn_t)ndr_push_netr_DsRGetDCNameInfo);
 316         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 317                 return ndr_map_error2ntstatus(ndr_err);
 318         }
 319
 320         if (gencache_lock_entry(key) != 0) {
 321                 data_blob_free(&blob);
 322                 return NT_STATUS_LOCK_NOT_GRANTED;
 323         }
 324
 325         ret = gencache_set_data_blob(key, &blob, expire_time);
 326         data_blob_free(&blob);
 327
 328         gencache_unlock_entry(key);
 329
 330         return ret ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 331 }
 332
 333 /****************************************************************
 334 ****************************************************************/
 335
 336 static NTSTATUS dsgetdcname_cache_refresh(TALLOC_CTX *mem_ctx,
 337                                           const char *domain_name,
 338                                           struct GUID *domain_guid,
 339                                           uint32_t flags,
 340                                           const char *site_name,
 341                                           struct netr_DsRGetDCNameInfo *info)
 342 {
 343         struct cldap_netlogon_reply r;
 344
 345         /* check if matching entry is older then 15 minutes, if yes, send
 346          * CLDAP/MAILSLOT ping again and store the cached data */
 347
 348         ZERO_STRUCT(r);
 349
 350         if (ads_cldap_netlogon(info->dc_unc,
 351                                info->domain_name, &r)) {
 352
 353                 dsgetdcname_cache_delete(mem_ctx, domain_name);
 354
 355                 return dsgetdcname_cache_store(mem_ctx,
 356                                                info->domain_name,
 357                                                info);
 358         }
 359
 360         return NT_STATUS_INVALID_NETWORK_RESPONSE;
 361 }
 362
 363 /****************************************************************
 364 ****************************************************************/
 365
 366 #define RETURN_ON_FALSE(x) if (!x) return false;
 367
 368 static bool check_cldap_reply_required_flags(uint32_t ret_flags,
 369                                              uint32_t req_flags)
 370 {
 371         if (req_flags & DS_PDC_REQUIRED)
 372                 RETURN_ON_FALSE(ret_flags & ADS_PDC);
 373
 374         if (req_flags & DS_GC_SERVER_REQUIRED)
 375                 RETURN_ON_FALSE(ret_flags & ADS_GC);
 376
 377         if (req_flags & DS_ONLY_LDAP_NEEDED)
 378                 RETURN_ON_FALSE(ret_flags & ADS_LDAP);
 379
 380         if ((req_flags & DS_DIRECTORY_SERVICE_REQUIRED) ||
 381             (req_flags & DS_DIRECTORY_SERVICE_PREFERRED))
 382                 RETURN_ON_FALSE(ret_flags & ADS_DS);
 383
 384         if (req_flags & DS_KDC_REQUIRED)
 385                 RETURN_ON_FALSE(ret_flags & ADS_KDC);
 386
 387         if (req_flags & DS_TIMESERV_REQUIRED)
 388                 RETURN_ON_FALSE(ret_flags & ADS_TIMESERV);
 389
 390         if (req_flags & DS_WRITABLE_REQUIRED)
 391                 RETURN_ON_FALSE(ret_flags & ADS_WRITABLE);
 392
 393         return true;
 394 }
 395
 396 /****************************************************************
 397 ****************************************************************/
 398
 399 static NTSTATUS dsgetdcname_cache_fetch(TALLOC_CTX *mem_ctx,
 400                                         const char *domain_name,
 401                                         struct GUID *domain_guid,
 402                                         uint32_t flags,
 403                                         const char *site_name,
 404                                         struct netr_DsRGetDCNameInfo **info_p,
 405                                         bool *expired)
 406 {
 407         char *key;
 408         DATA_BLOB blob;
 409         enum ndr_err_code ndr_err;
 410         struct netr_DsRGetDCNameInfo *info;
 411
 412         if (!gencache_init()) {
 413                 return NT_STATUS_INTERNAL_DB_ERROR;
 414         }
 415
 416         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 417         if (!key) {
 418                 return NT_STATUS_NO_MEMORY;
 419         }
 420
 421         if (!gencache_get_data_blob(key, &blob, expired)) {
 422                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 423         }
 424
 425         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 426         if (!info) {
 427                 return NT_STATUS_NO_MEMORY;
 428         }
 429
 430         ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, info,
 431                       (ndr_pull_flags_fn_t)ndr_pull_netr_DsRGetDCNameInfo);
 432
 433         data_blob_free(&blob);
 434         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 435                 dsgetdcname_cache_delete(mem_ctx, domain_name);
 436                 return ndr_map_error2ntstatus(ndr_err);
 437         }
 438
 439         if (DEBUGLEVEL >= 10) {
 440                 NDR_PRINT_DEBUG(netr_DsRGetDCNameInfo, info);
 441         }
 442
 443         /* check flags */
 444         if (!check_cldap_reply_required_flags(info->dc_flags, flags)) {
 445                 DEBUG(10,("invalid flags\n"));
 446                 return NT_STATUS_INVALID_PARAMETER;
 447         }
 448
 449         if ((flags & DS_IP_REQUIRED) &&
 450             (info->dc_address_type != DS_ADDRESS_TYPE_INET)) {
 451                 return NT_STATUS_INVALID_PARAMETER_MIX;
 452         }
 453
 454         *info_p = info;
 455
 456         return NT_STATUS_OK;
 457 }
 458
 459 /****************************************************************
 460 ****************************************************************/
 461
 462 static NTSTATUS dsgetdcname_cached(TALLOC_CTX *mem_ctx,
 463                                    const char *domain_name,
 464                                    struct GUID *domain_guid,
 465                                    uint32_t flags,
 466                                    const char *site_name,
 467                                    struct netr_DsRGetDCNameInfo **info)
 468 {
 469         NTSTATUS status;
 470         bool expired = false;
 471
 472         status = dsgetdcname_cache_fetch(mem_ctx, domain_name, domain_guid,
 473                                          flags, site_name, info, &expired);
 474         if (!NT_STATUS_IS_OK(status)) {
 475                 DEBUG(10,("dsgetdcname_cached: cache fetch failed with: %s\n",
 476                         nt_errstr(status)));
 477                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 478         }
 479
 480         if (flags & DS_BACKGROUND_ONLY) {
 481                 return status;
 482         }
 483
 484         if (expired) {
 485                 status = dsgetdcname_cache_refresh(mem_ctx, domain_name,
 486                                                    domain_guid, flags,
 487                                                    site_name, *info);
 488                 if (!NT_STATUS_IS_OK(status)) {
 489                         return status;
 490                 }
 491         }
 492
 493         return status;
 494 }
 495
 496 /****************************************************************
 497 ****************************************************************/
 498
 499 static bool check_allowed_required_flags(uint32_t flags)
 500 {
 501         uint32_t return_type = flags & (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME);
 502         uint32_t offered_type = flags & (DS_IS_FLAT_NAME|DS_IS_DNS_NAME);
 503         uint32_t query_type = flags & (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY);
 504
 505         /* FIXME: check for DSGETDC_VALID_FLAGS and check for excluse bits
 506          * (DS_PDC_REQUIRED, DS_KDC_REQUIRED, DS_GC_SERVER_REQUIRED) */
 507
 508         debug_dsdcinfo_flags(10, flags);
 509
 510         if (return_type == (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME)) {
 511                 return false;
 512         }
 513
 514         if (offered_type == (DS_IS_DNS_NAME|DS_IS_FLAT_NAME)) {
 515                 return false;
 516         }
 517
 518         if (query_type == (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY)) {
 519                 return false;
 520         }
 521
 522 #if 0
 523         if ((flags & DS_RETURN_DNS_NAME) && (!(flags & DS_IP_REQUIRED))) {
 524                 printf("gd: here5 \n");
 525                 return false;
 526         }
 527 #endif
 528         return true;
 529 }
 530
 531 /****************************************************************
 532 ****************************************************************/
 533
 534 static NTSTATUS discover_dc_netbios(TALLOC_CTX *mem_ctx,
 535                                     const char *domain_name,
 536                                     uint32_t flags,
 537                                     struct ip_service_name **returned_dclist,
 538                                     int *return_count)
 539 {
 540         if (lp_disable_netbios()) {
 541                 return NT_STATUS_NOT_SUPPORTED;
 542         }
 543
 544         /* FIXME: code here */
 545
 546         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 547 }
 548
 549 /****************************************************************
 550 ****************************************************************/
 551
 552 static NTSTATUS discover_dc_dns(TALLOC_CTX *mem_ctx,
 553                                 const char *domain_name,
 554                                 struct GUID *domain_guid,
 555                                 uint32_t flags,
 556                                 const char *site_name,
 557                                 struct ip_service_name **returned_dclist,
 558                                 int *return_count)
 559 {
 560         int i, j;
 561         NTSTATUS status;
 562         struct dns_rr_srv *dcs = NULL;
 563         int numdcs = 0;
 564         int numaddrs = 0;
 565
 566         if ((!(flags & DS_DIRECTORY_SERVICE_REQUIRED)) &&
 567             (!(flags & DS_KDC_REQUIRED)) &&
 568             (!(flags & DS_GC_SERVER_REQUIRED)) &&
 569             (!(flags & DS_PDC_REQUIRED))) {
 570                 DEBUG(1,("discover_dc_dns: invalid flags\n"));
 571                 return NT_STATUS_INVALID_PARAMETER;
 572         }
 573
 574         if (flags & DS_PDC_REQUIRED) {
 575                 status = ads_dns_query_pdc(mem_ctx, domain_name,
 576                                            &dcs, &numdcs);
 577         } else if (flags & DS_GC_SERVER_REQUIRED) {
 578                 status = ads_dns_query_gcs(mem_ctx, domain_name, site_name,
 579                                            &dcs, &numdcs);
 580         } else if (flags & DS_KDC_REQUIRED) {
 581                 status = ads_dns_query_kdcs(mem_ctx, domain_name, site_name,
 582                                             &dcs, &numdcs);
 583         } else if (flags & DS_DIRECTORY_SERVICE_REQUIRED) {
 584                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 585                                            &dcs, &numdcs);
 586         } else if (domain_guid) {
 587                 status = ads_dns_query_dcs_guid(mem_ctx, domain_name,
 588                                                 domain_guid, &dcs, &numdcs);
 589         } else {
 590                 /* FIXME: ? */
 591                 DEBUG(1,("discover_dc_dns: not enough input\n"));
 592                 status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 593         }
 594
 595         if (!NT_STATUS_IS_OK(status)) {
 596                 return status;
 597         }
 598
 599         if (numdcs == 0) {
 600                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 601         }
 602
 603         for (i=0;i<numdcs;i++) {
 604                 numaddrs += MAX(dcs[i].num_ips,1);
 605         }
 606
 607         if ((*returned_dclist = TALLOC_ZERO_ARRAY(mem_ctx,
 608                                                   struct ip_service_name,
 609                                                   numaddrs)) == NULL) {
 610                 return NT_STATUS_NO_MEMORY;
 611         }
 612
 613         /* now unroll the list of IP addresses */
 614
 615         *return_count = 0;
 616         i = 0;
 617         j = 0;
 618         while (i < numdcs && (*return_count<numaddrs)) {
 619
 620                 struct ip_service_name *r = &(*returned_dclist)[*return_count];
 621
 622                 r->port = dcs[i].port;
 623                 r->hostname = dcs[i].hostname;
 624
 625                 if (!(flags & DS_IP_REQUIRED)) {
 626                         (*return_count)++;
 627                         continue;
 628                 }
 629
 630                 /* If we don't have an IP list for a name, lookup it up */
 631
 632                 if (!dcs[i].ss_s) {
 633                         interpret_string_addr(&r->ss, dcs[i].hostname, 0);
 634                         i++;
 635                         j = 0;
 636                 } else {
 637                         /* use the IP addresses from the SRV sresponse */
 638
 639                         if (j >= dcs[i].num_ips) {
 640                                 i++;
 641                                 j = 0;
 642                                 continue;
 643                         }
 644
 645                         r->ss = dcs[i].ss_s[j];
 646                         j++;
 647                 }
 648
 649                 /* make sure it is a valid IP.  I considered checking the
 650                  * negative connection cache, but this is the wrong place for
 651                  * it.  Maybe only as a hac.  After think about it, if all of
 652                  * the IP addresses retuend from DNS are dead, what hope does a
 653                  * netbios name lookup have?  The standard reason for falling
 654                  * back to netbios lookups is that our DNS server doesn't know
 655                  * anything about the DC's   -- jerry */
 656
 657                 if (!is_zero_addr(&r->ss)) {
 658                         (*return_count)++;
 659                         continue;
 660                 }
 661         }
 662
 663         return (*return_count > 0) ? NT_STATUS_OK :
 664                                      NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 665 }
 666
 667 /****************************************************************
 668 ****************************************************************/
 669
 670 static NTSTATUS make_domain_controller_info(TALLOC_CTX *mem_ctx,
 671                                             const char *dc_unc,
 672                                             const char *dc_address,
 673                                             uint32_t dc_address_type,
 674                                             const struct GUID *domain_guid,
 675                                             const char *domain_name,
 676                                             const char *forest_name,
 677                                             uint32_t flags,
 678                                             const char *dc_site_name,
 679                                             const char *client_site_name,
 680                                             struct netr_DsRGetDCNameInfo **info_out)
 681 {
 682         struct netr_DsRGetDCNameInfo *info;
 683
 684         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 685         NT_STATUS_HAVE_NO_MEMORY(info);
 686
 687         if (dc_unc) {
 688                 info->dc_unc = talloc_strdup(mem_ctx, dc_unc);
 689                 NT_STATUS_HAVE_NO_MEMORY(info->dc_unc);
 690         }
 691
 692         if (dc_address) {
 693                 info->dc_address = talloc_strdup(mem_ctx, dc_address);
 694                 NT_STATUS_HAVE_NO_MEMORY(info->dc_address);
 695         }
 696
 697         info->dc_address_type = dc_address_type;
 698
 699         if (domain_guid) {
 700                 info->domain_guid = *domain_guid;
 701         }
 702
 703         if (domain_name) {
 704                 info->domain_name = talloc_strdup(mem_ctx, domain_name);
 705                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 706         }
 707
 708         if (forest_name) {
 709                 info->forest_name = talloc_strdup(mem_ctx, forest_name);
 710                 NT_STATUS_HAVE_NO_MEMORY(info->forest_name);
 711         }
 712
 713         info->dc_flags = flags;
 714
 715         if (dc_site_name) {
 716                 info->dc_site_name = talloc_strdup(mem_ctx, dc_site_name);
 717                 NT_STATUS_HAVE_NO_MEMORY(info->dc_site_name);
 718         }
 719
 720         if (client_site_name) {
 721                 info->client_site_name = talloc_strdup(mem_ctx,
 722                                                        client_site_name);
 723                 NT_STATUS_HAVE_NO_MEMORY(info->client_site_name);
 724         }
 725
 726         *info_out = info;
 727
 728         return NT_STATUS_OK;
 729 }
 730
 731 /****************************************************************
 732 ****************************************************************/
 733
 734 static NTSTATUS process_dc_dns(TALLOC_CTX *mem_ctx,
 735                                const char *domain_name,
 736                                uint32_t flags,
 737                                struct ip_service_name **dclist,
 738                                int num_dcs,
 739                                struct netr_DsRGetDCNameInfo **info)
 740 {
 741         int i = 0;
 742         bool valid_dc = false;
 743         struct cldap_netlogon_reply r;
 744         const char *dc_hostname, *dc_domain_name;
 745         const char *dc_address;
 746         uint32_t dc_address_type;
 747         uint32_t dc_flags;
 748         struct GUID dc_guid;
 749
 750         for (i=0; i<num_dcs; i++) {
 751
 752                 ZERO_STRUCT(r);
 753
 754                 if ((ads_cldap_netlogon(dclist[i]->hostname,
 755                                         domain_name, &r)) &&
 756                     (check_cldap_reply_required_flags(r.flags, flags))) {
 757                         valid_dc = true;
 758                         break;
 759                 }
 760
 761                 continue;
 762         }
 763
 764         if (!valid_dc) {
 765                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 766         }
 767
 768         dc_flags = r.flags;
 769
 770         if (flags & DS_RETURN_FLAT_NAME) {
 771                 if (!strlen(r.netbios_hostname) || !strlen(r.netbios_domain)) {
 772                         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 773                 }
 774                 dc_hostname = r.netbios_hostname;
 775                 dc_domain_name = r.netbios_domain;
 776         } else if (flags & DS_RETURN_DNS_NAME) {
 777                 if (!strlen(r.hostname) || !strlen(r.domain)) {
 778                         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 779                 }
 780                 dc_hostname = r.hostname;
 781                 dc_domain_name = r.domain;
 782                 dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
 783         } else {
 784                 /* FIXME */
 785                 dc_hostname = r.hostname;
 786                 dc_domain_name = r.domain;
 787                 dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
 788         }
 789
 790         if (flags & DS_IP_REQUIRED) {
 791                 char addr[INET6_ADDRSTRLEN];
 792                 print_sockaddr(addr, sizeof(addr), &dclist[i]->ss);
 793                 dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
 794                                                 addr);
 795                 dc_address_type = DS_ADDRESS_TYPE_INET;
 796         } else {
 797                 dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
 798                                              r.netbios_hostname);
 799                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 800         }
 801         NT_STATUS_HAVE_NO_MEMORY(dc_address);
 802         smb_uuid_unpack(r.guid, &dc_guid);
 803
 804         if (r.forest) {
 805                 dc_flags |= DS_DNS_FOREST;
 806         }
 807
 808         return make_domain_controller_info(mem_ctx,
 809                                            dc_hostname,
 810                                            dc_address,
 811                                            dc_address_type,
 812                                            &dc_guid,
 813                                            dc_domain_name,
 814                                            r.forest,
 815                                            dc_flags,
 816                                            r.server_site_name,
 817                                            r.client_site_name,
 818                                            info);
 819
 820 }
 821
 822 /****************************************************************
 823 ****************************************************************/
 824
 825 static NTSTATUS process_dc_netbios(TALLOC_CTX *mem_ctx,
 826                                    const char *domain_name,
 827                                    uint32_t flags,
 828                                    struct ip_service_name **dclist,
 829                                    int num_dcs,
 830                                    struct netr_DsRGetDCNameInfo **info)
 831 {
 832         /* FIXME: code here */
 833
 834         return NT_STATUS_NOT_SUPPORTED;
 835 }
 836
 837 /****************************************************************
 838 ****************************************************************/
 839
 840 static NTSTATUS dsgetdcname_rediscover(TALLOC_CTX *mem_ctx,
 841                                        const char *domain_name,
 842                                        struct GUID *domain_guid,
 843                                        uint32_t flags,
 844                                        const char *site_name,
 845                                        struct netr_DsRGetDCNameInfo **info)
 846 {
 847         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 848         struct ip_service_name *dclist;
 849         int num_dcs;
 850
 851         DEBUG(10,("dsgetdcname_rediscover\n"));
 852
 853         if (flags & DS_IS_FLAT_NAME) {
 854
 855                 status = discover_dc_netbios(mem_ctx, domain_name, flags,
 856                                              &dclist, &num_dcs);
 857                 NT_STATUS_NOT_OK_RETURN(status);
 858
 859                 return process_dc_netbios(mem_ctx, domain_name, flags,
 860                                           &dclist, num_dcs, info);
 861         }
 862
 863         if (flags & DS_IS_DNS_NAME) {
 864
 865                 status = discover_dc_dns(mem_ctx, domain_name, domain_guid,
 866                                          flags, site_name, &dclist, &num_dcs);
 867                 NT_STATUS_NOT_OK_RETURN(status);
 868
 869                 return process_dc_dns(mem_ctx, domain_name, flags,
 870                                       &dclist, num_dcs, info);
 871         }
 872
 873         status = discover_dc_dns(mem_ctx, domain_name, domain_guid, flags,
 874                                  site_name, &dclist, &num_dcs);
 875
 876         if (NT_STATUS_IS_OK(status) && num_dcs != 0) {
 877
 878                 status = process_dc_dns(mem_ctx, domain_name, flags, &dclist,
 879                                         num_dcs, info);
 880                 if (NT_STATUS_IS_OK(status)) {
 881                         return status;
 882                 }
 883         }
 884
 885         status = discover_dc_netbios(mem_ctx, domain_name, flags, &dclist,
 886                                      &num_dcs);
 887         NT_STATUS_NOT_OK_RETURN(status);
 888
 889         return process_dc_netbios(mem_ctx, domain_name, flags, &dclist,
 890                                   num_dcs, info);
 891 }
 892
 893 /********************************************************************
 894  dsgetdcname.
 895
 896  This will be the only public function here.
 897 ********************************************************************/
 898
 899 NTSTATUS dsgetdcname(TALLOC_CTX *mem_ctx,
 900                      const char *domain_name,
 901                      struct GUID *domain_guid,
 902                      const char *site_name,
 903                      uint32_t flags,
 904                      struct netr_DsRGetDCNameInfo **info)
 905 {
 906         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 907         struct netr_DsRGetDCNameInfo *myinfo = NULL;
 908
 909         DEBUG(10,("dsgetdcname: domain_name: %s, "
 910                   "domain_guid: %s, site_name: %s, flags: 0x%08x\n",
 911                   domain_name,
 912                   domain_guid ? GUID_string(mem_ctx, domain_guid) : "(null)",
 913                   site_name, flags));
 914
 915         *info = NULL;
 916
 917         if (!check_allowed_required_flags(flags)) {
 918                 DEBUG(0,("invalid flags specified\n"));
 919                 return NT_STATUS_INVALID_PARAMETER;
 920         }
 921
 922         if (flags & DS_FORCE_REDISCOVERY) {
 923                 goto rediscover;
 924         }
 925
 926         status = dsgetdcname_cached(mem_ctx, domain_name, domain_guid,
 927                                     flags, site_name, &myinfo);
 928         if (NT_STATUS_IS_OK(status)) {
 929                 *info = myinfo;
 930                 return status;
 931         }
 932
 933         if (flags & DS_BACKGROUND_ONLY) {
 934                 return status;
 935         }
 936
 937  rediscover:
 938         status = dsgetdcname_rediscover(mem_ctx, domain_name,
 939                                         domain_guid, flags, site_name,
 940                                         &myinfo);
 941
 942         if (NT_STATUS_IS_OK(status)) {
 943                 dsgetdcname_cache_store(mem_ctx, domain_name, myinfo);
 944                 *info = myinfo;
 945         }
 946
 947         return status;
 948 }