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 char *dsgetdcname_cache_key(TALLOC_CTX *mem_ctx, const char *domain)
 114 {
 115         if (!mem_ctx || !domain) {
 116                 return NULL;
 117         }
 118
 119         return talloc_asprintf_strupper_m(mem_ctx, DSGETDCNAME_FMT, domain);
 120 }
 121
 122 /****************************************************************
 123 ****************************************************************/
 124
 125 static NTSTATUS dsgetdcname_cache_delete(TALLOC_CTX *mem_ctx,
 126                                         const char *domain_name)
 127 {
 128         char *key;
 129
 130         if (!gencache_init()) {
 131                 return NT_STATUS_INTERNAL_DB_ERROR;
 132         }
 133
 134         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 135         if (!key) {
 136                 return NT_STATUS_NO_MEMORY;
 137         }
 138
 139         if (!gencache_del(key)) {
 140                 return NT_STATUS_UNSUCCESSFUL;
 141         }
 142
 143         return NT_STATUS_OK;
 144 }
 145
 146 /****************************************************************
 147 ****************************************************************/
 148
 149 static NTSTATUS dsgetdcname_cache_store(TALLOC_CTX *mem_ctx,
 150                                         const char *domain_name,
 151                                         struct netr_DsRGetDCNameInfo *info)
 152 {
 153         time_t expire_time;
 154         char *key;
 155         bool ret = false;
 156         DATA_BLOB blob;
 157         enum ndr_err_code ndr_err;
 158
 159         if (!gencache_init()) {
 160                 return NT_STATUS_INTERNAL_DB_ERROR;
 161         }
 162
 163         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 164         if (!key) {
 165                 return NT_STATUS_NO_MEMORY;
 166         }
 167
 168         expire_time = time(NULL) + DSGETDCNAME_CACHE_TTL;
 169
 170         ndr_err = ndr_push_struct_blob(&blob, mem_ctx, info,
 171                        (ndr_push_flags_fn_t)ndr_push_netr_DsRGetDCNameInfo);
 172         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 173                 return ndr_map_error2ntstatus(ndr_err);
 174         }
 175
 176         if (gencache_lock_entry(key) != 0) {
 177                 data_blob_free(&blob);
 178                 return NT_STATUS_LOCK_NOT_GRANTED;
 179         }
 180
 181         ret = gencache_set_data_blob(key, &blob, expire_time);
 182         data_blob_free(&blob);
 183
 184         gencache_unlock_entry(key);
 185
 186         return ret ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 187 }
 188
 189 /****************************************************************
 190 ****************************************************************/
 191
 192 static NTSTATUS dsgetdcname_cache_refresh(TALLOC_CTX *mem_ctx,
 193                                           const char *domain_name,
 194                                           struct GUID *domain_guid,
 195                                           uint32_t flags,
 196                                           const char *site_name,
 197                                           struct netr_DsRGetDCNameInfo *info)
 198 {
 199         struct cldap_netlogon_reply r;
 200
 201         /* check if matching entry is older then 15 minutes, if yes, send
 202          * CLDAP/MAILSLOT ping again and store the cached data */
 203
 204         ZERO_STRUCT(r);
 205
 206         if (ads_cldap_netlogon(info->dc_unc,
 207                                info->domain_name, &r)) {
 208
 209                 dsgetdcname_cache_delete(mem_ctx, domain_name);
 210
 211                 return dsgetdcname_cache_store(mem_ctx,
 212                                                info->domain_name,
 213                                                info);
 214         }
 215
 216         return NT_STATUS_INVALID_NETWORK_RESPONSE;
 217 }
 218
 219 /****************************************************************
 220 ****************************************************************/
 221
 222 #define RETURN_ON_FALSE(x) if (!x) return false;
 223
 224 static bool check_cldap_reply_required_flags(uint32_t ret_flags,
 225                                              uint32_t req_flags)
 226 {
 227         if (req_flags & DS_PDC_REQUIRED)
 228                 RETURN_ON_FALSE(ret_flags & ADS_PDC);
 229
 230         if (req_flags & DS_GC_SERVER_REQUIRED)
 231                 RETURN_ON_FALSE(ret_flags & ADS_GC);
 232
 233         if (req_flags & DS_ONLY_LDAP_NEEDED)
 234                 RETURN_ON_FALSE(ret_flags & ADS_LDAP);
 235
 236         if ((req_flags & DS_DIRECTORY_SERVICE_REQUIRED) ||
 237             (req_flags & DS_DIRECTORY_SERVICE_PREFERRED))
 238                 RETURN_ON_FALSE(ret_flags & ADS_DS);
 239
 240         if (req_flags & DS_KDC_REQUIRED)
 241                 RETURN_ON_FALSE(ret_flags & ADS_KDC);
 242
 243         if (req_flags & DS_TIMESERV_REQUIRED)
 244                 RETURN_ON_FALSE(ret_flags & ADS_TIMESERV);
 245
 246         if (req_flags & DS_WRITABLE_REQUIRED)
 247                 RETURN_ON_FALSE(ret_flags & ADS_WRITABLE);
 248
 249         return true;
 250 }
 251
 252 /****************************************************************
 253 ****************************************************************/
 254
 255 static NTSTATUS dsgetdcname_cache_fetch(TALLOC_CTX *mem_ctx,
 256                                         const char *domain_name,
 257                                         struct GUID *domain_guid,
 258                                         uint32_t flags,
 259                                         const char *site_name,
 260                                         struct netr_DsRGetDCNameInfo **info_p,
 261                                         bool *expired)
 262 {
 263         char *key;
 264         DATA_BLOB blob;
 265         enum ndr_err_code ndr_err;
 266         struct netr_DsRGetDCNameInfo *info;
 267
 268         if (!gencache_init()) {
 269                 return NT_STATUS_INTERNAL_DB_ERROR;
 270         }
 271
 272         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 273         if (!key) {
 274                 return NT_STATUS_NO_MEMORY;
 275         }
 276
 277         if (!gencache_get_data_blob(key, &blob, expired)) {
 278                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
 279         }
 280
 281         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 282         if (!info) {
 283                 return NT_STATUS_NO_MEMORY;
 284         }
 285
 286         ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, info,
 287                       (ndr_pull_flags_fn_t)ndr_pull_netr_DsRGetDCNameInfo);
 288
 289         data_blob_free(&blob);
 290         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 291                 dsgetdcname_cache_delete(mem_ctx, domain_name);
 292                 return ndr_map_error2ntstatus(ndr_err);
 293         }
 294
 295         if (DEBUGLEVEL >= 10) {
 296                 NDR_PRINT_DEBUG(netr_DsRGetDCNameInfo, info);
 297         }
 298
 299         /* check flags */
 300         if (!check_cldap_reply_required_flags(info->dc_flags, flags)) {
 301                 DEBUG(10,("invalid flags\n"));
 302                 return NT_STATUS_INVALID_PARAMETER;
 303         }
 304
 305         if ((flags & DS_IP_REQUIRED) &&
 306             (info->dc_address_type != DS_ADDRESS_TYPE_INET)) {
 307                 return NT_STATUS_INVALID_PARAMETER_MIX;
 308         }
 309
 310         *info_p = info;
 311
 312         return NT_STATUS_OK;
 313 }
 314
 315 /****************************************************************
 316 ****************************************************************/
 317
 318 static NTSTATUS dsgetdcname_cached(TALLOC_CTX *mem_ctx,
 319                                    const char *domain_name,
 320                                    struct GUID *domain_guid,
 321                                    uint32_t flags,
 322                                    const char *site_name,
 323                                    struct netr_DsRGetDCNameInfo **info)
 324 {
 325         NTSTATUS status;
 326         bool expired = false;
 327
 328         status = dsgetdcname_cache_fetch(mem_ctx, domain_name, domain_guid,
 329                                          flags, site_name, info, &expired);
 330         if (!NT_STATUS_IS_OK(status)) {
 331                 DEBUG(10,("dsgetdcname_cached: cache fetch failed with: %s\n",
 332                         nt_errstr(status)));
 333                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 334         }
 335
 336         if (flags & DS_BACKGROUND_ONLY) {
 337                 return status;
 338         }
 339
 340         if (expired) {
 341                 status = dsgetdcname_cache_refresh(mem_ctx, domain_name,
 342                                                    domain_guid, flags,
 343                                                    site_name, *info);
 344                 if (!NT_STATUS_IS_OK(status)) {
 345                         return status;
 346                 }
 347         }
 348
 349         return status;
 350 }
 351
 352 /****************************************************************
 353 ****************************************************************/
 354
 355 static bool check_allowed_required_flags(uint32_t flags)
 356 {
 357         uint32_t return_type = flags & (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME);
 358         uint32_t offered_type = flags & (DS_IS_FLAT_NAME|DS_IS_DNS_NAME);
 359         uint32_t query_type = flags & (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY);
 360
 361         /* FIXME: check for DSGETDC_VALID_FLAGS and check for excluse bits
 362          * (DS_PDC_REQUIRED, DS_KDC_REQUIRED, DS_GC_SERVER_REQUIRED) */
 363
 364         debug_dsdcinfo_flags(10, flags);
 365
 366         if (return_type == (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME)) {
 367                 return false;
 368         }
 369
 370         if (offered_type == (DS_IS_DNS_NAME|DS_IS_FLAT_NAME)) {
 371                 return false;
 372         }
 373
 374         if (query_type == (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY)) {
 375                 return false;
 376         }
 377
 378 #if 0
 379         if ((flags & DS_RETURN_DNS_NAME) && (!(flags & DS_IP_REQUIRED))) {
 380                 printf("gd: here5 \n");
 381                 return false;
 382         }
 383 #endif
 384         return true;
 385 }
 386
 387 /****************************************************************
 388 ****************************************************************/
 389
 390 static NTSTATUS discover_dc_netbios(TALLOC_CTX *mem_ctx,
 391                                     const char *domain_name,
 392                                     uint32_t flags,
 393                                     struct ip_service_name **returned_dclist,
 394                                     int *return_count)
 395 {
 396         if (lp_disable_netbios()) {
 397                 return NT_STATUS_NOT_SUPPORTED;
 398         }
 399
 400         /* FIXME: code here */
 401
 402         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 403 }
 404
 405 /****************************************************************
 406 ****************************************************************/
 407
 408 static NTSTATUS discover_dc_dns(TALLOC_CTX *mem_ctx,
 409                                 const char *domain_name,
 410                                 struct GUID *domain_guid,
 411                                 uint32_t flags,
 412                                 const char *site_name,
 413                                 struct ip_service_name **returned_dclist,
 414                                 int *return_count)
 415 {
 416         int i, j;
 417         NTSTATUS status;
 418         struct dns_rr_srv *dcs = NULL;
 419         int numdcs = 0;
 420         int numaddrs = 0;
 421         struct ip_service_name *dclist = NULL;
 422         int count = 0;
 423
 424         if ((!(flags & DS_DIRECTORY_SERVICE_REQUIRED)) &&
 425             (!(flags & DS_KDC_REQUIRED)) &&
 426             (!(flags & DS_GC_SERVER_REQUIRED)) &&
 427             (!(flags & DS_PDC_REQUIRED))) {
 428                 DEBUG(1,("discover_dc_dns: invalid flags\n"));
 429                 return NT_STATUS_INVALID_PARAMETER;
 430         }
 431
 432         if (flags & DS_PDC_REQUIRED) {
 433                 status = ads_dns_query_pdc(mem_ctx, domain_name,
 434                                            &dcs, &numdcs);
 435         } else if (flags & DS_GC_SERVER_REQUIRED) {
 436                 status = ads_dns_query_gcs(mem_ctx, domain_name, site_name,
 437                                            &dcs, &numdcs);
 438         } else if (flags & DS_KDC_REQUIRED) {
 439                 status = ads_dns_query_kdcs(mem_ctx, domain_name, site_name,
 440                                             &dcs, &numdcs);
 441         } else if (flags & DS_DIRECTORY_SERVICE_REQUIRED) {
 442                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 443                                            &dcs, &numdcs);
 444         } else if (domain_guid) {
 445                 status = ads_dns_query_dcs_guid(mem_ctx, domain_name,
 446                                                 domain_guid, &dcs, &numdcs);
 447         } else {
 448                 /* FIXME: ? */
 449                 DEBUG(1,("discover_dc_dns: not enough input\n"));
 450                 status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 451         }
 452
 453         if (!NT_STATUS_IS_OK(status)) {
 454                 return status;
 455         }
 456
 457         if (numdcs == 0) {
 458                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 459         }
 460
 461         for (i=0;i<numdcs;i++) {
 462                 numaddrs += MAX(dcs[i].num_ips,1);
 463         }
 464
 465         dclist = TALLOC_ZERO_ARRAY(mem_ctx,
 466                                    struct ip_service_name,
 467                                    numaddrs);
 468         if (!dclist) {
 469                 return NT_STATUS_NO_MEMORY;
 470         }
 471
 472         /* now unroll the list of IP addresses */
 473
 474         *return_count = 0;
 475         i = 0;
 476         j = 0;
 477
 478         while ((i < numdcs) && (count < numaddrs)) {
 479
 480                 struct ip_service_name *r = &dclist[count];
 481
 482                 r->port = dcs[i].port;
 483                 r->hostname = dcs[i].hostname;
 484
 485                 if (!(flags & DS_IP_REQUIRED)) {
 486                         count++;
 487                         continue;
 488                 }
 489
 490                 /* If we don't have an IP list for a name, lookup it up */
 491
 492                 if (!dcs[i].ss_s) {
 493                         interpret_string_addr(&r->ss, dcs[i].hostname, 0);
 494                         i++;
 495                         j = 0;
 496                 } else {
 497                         /* use the IP addresses from the SRV sresponse */
 498
 499                         if (j >= dcs[i].num_ips) {
 500                                 i++;
 501                                 j = 0;
 502                                 continue;
 503                         }
 504
 505                         r->ss = dcs[i].ss_s[j];
 506                         j++;
 507                 }
 508
 509                 /* make sure it is a valid IP.  I considered checking the
 510                  * negative connection cache, but this is the wrong place for
 511                  * it.  Maybe only as a hac.  After think about it, if all of
 512                  * the IP addresses retuend from DNS are dead, what hope does a
 513                  * netbios name lookup have?  The standard reason for falling
 514                  * back to netbios lookups is that our DNS server doesn't know
 515                  * anything about the DC's   -- jerry */
 516
 517                 if (!is_zero_addr(&r->ss)) {
 518                         count++;
 519                         continue;
 520                 }
 521         }
 522
 523         *returned_dclist = dclist;
 524         *return_count = count;
 525
 526         if (count > 0) {
 527                 return NT_STATUS_OK;
 528         }
 529
 530         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 531 }
 532
 533 /****************************************************************
 534 ****************************************************************/
 535
 536 static NTSTATUS make_domain_controller_info(TALLOC_CTX *mem_ctx,
 537                                             const char *dc_unc,
 538                                             const char *dc_address,
 539                                             uint32_t dc_address_type,
 540                                             const struct GUID *domain_guid,
 541                                             const char *domain_name,
 542                                             const char *forest_name,
 543                                             uint32_t flags,
 544                                             const char *dc_site_name,
 545                                             const char *client_site_name,
 546                                             struct netr_DsRGetDCNameInfo **info_out)
 547 {
 548         struct netr_DsRGetDCNameInfo *info;
 549
 550         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 551         NT_STATUS_HAVE_NO_MEMORY(info);
 552
 553         if (dc_unc) {
 554                 info->dc_unc = talloc_strdup(mem_ctx, dc_unc);
 555                 NT_STATUS_HAVE_NO_MEMORY(info->dc_unc);
 556         }
 557
 558         if (dc_address) {
 559                 info->dc_address = talloc_strdup(mem_ctx, dc_address);
 560                 NT_STATUS_HAVE_NO_MEMORY(info->dc_address);
 561         }
 562
 563         info->dc_address_type = dc_address_type;
 564
 565         if (domain_guid) {
 566                 info->domain_guid = *domain_guid;
 567         }
 568
 569         if (domain_name) {
 570                 info->domain_name = talloc_strdup(mem_ctx, domain_name);
 571                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 572         }
 573
 574         if (forest_name) {
 575                 info->forest_name = talloc_strdup(mem_ctx, forest_name);
 576                 NT_STATUS_HAVE_NO_MEMORY(info->forest_name);
 577         }
 578
 579         info->dc_flags = flags;
 580
 581         if (dc_site_name) {
 582                 info->dc_site_name = talloc_strdup(mem_ctx, dc_site_name);
 583                 NT_STATUS_HAVE_NO_MEMORY(info->dc_site_name);
 584         }
 585
 586         if (client_site_name) {
 587                 info->client_site_name = talloc_strdup(mem_ctx,
 588                                                        client_site_name);
 589                 NT_STATUS_HAVE_NO_MEMORY(info->client_site_name);
 590         }
 591
 592         *info_out = info;
 593
 594         return NT_STATUS_OK;
 595 }
 596
 597 /****************************************************************
 598 ****************************************************************/
 599
 600 static NTSTATUS process_dc_dns(TALLOC_CTX *mem_ctx,
 601                                const char *domain_name,
 602                                uint32_t flags,
 603                                struct ip_service_name *dclist,
 604                                int num_dcs,
 605                                struct netr_DsRGetDCNameInfo **info)
 606 {
 607         int i = 0;
 608         bool valid_dc = false;
 609         struct cldap_netlogon_reply r;
 610         const char *dc_hostname, *dc_domain_name;
 611         const char *dc_address;
 612         uint32_t dc_address_type;
 613         uint32_t dc_flags;
 614         struct GUID dc_guid;
 615
 616         for (i=0; i<num_dcs; i++) {
 617
 618                 ZERO_STRUCT(r);
 619
 620                 DEBUG(10,("LDAP ping to %s\n", dclist[i].hostname));
 621
 622                 if ((ads_cldap_netlogon(dclist[i].hostname,
 623                                         domain_name, &r)) &&
 624                     (check_cldap_reply_required_flags(r.flags, flags))) {
 625                         valid_dc = true;
 626                         break;
 627                 }
 628
 629                 continue;
 630         }
 631
 632         if (!valid_dc) {
 633                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 634         }
 635
 636         dc_flags = r.flags;
 637
 638         if (flags & DS_RETURN_FLAT_NAME) {
 639                 if (!strlen(r.netbios_hostname) || !strlen(r.netbios_domain)) {
 640                         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 641                 }
 642                 dc_hostname = r.netbios_hostname;
 643                 dc_domain_name = r.netbios_domain;
 644         } else if (flags & DS_RETURN_DNS_NAME) {
 645                 if (!strlen(r.hostname) || !strlen(r.domain)) {
 646                         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 647                 }
 648                 dc_hostname = r.hostname;
 649                 dc_domain_name = r.domain;
 650                 dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
 651         } else {
 652                 /* FIXME */
 653                 dc_hostname = r.hostname;
 654                 dc_domain_name = r.domain;
 655                 dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
 656         }
 657
 658         if (flags & DS_IP_REQUIRED) {
 659                 char addr[INET6_ADDRSTRLEN];
 660                 print_sockaddr(addr, sizeof(addr), &dclist[i].ss);
 661                 dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
 662                                                 addr);
 663                 dc_address_type = DS_ADDRESS_TYPE_INET;
 664         } else {
 665                 dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
 666                                              r.netbios_hostname);
 667                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 668         }
 669         NT_STATUS_HAVE_NO_MEMORY(dc_address);
 670         smb_uuid_unpack(r.guid, &dc_guid);
 671
 672         if (r.forest) {
 673                 dc_flags |= DS_DNS_FOREST;
 674         }
 675
 676         return make_domain_controller_info(mem_ctx,
 677                                            dc_hostname,
 678                                            dc_address,
 679                                            dc_address_type,
 680                                            &dc_guid,
 681                                            dc_domain_name,
 682                                            r.forest,
 683                                            dc_flags,
 684                                            r.server_site_name,
 685                                            r.client_site_name,
 686                                            info);
 687
 688 }
 689
 690 /****************************************************************
 691 ****************************************************************/
 692
 693 static NTSTATUS process_dc_netbios(TALLOC_CTX *mem_ctx,
 694                                    const char *domain_name,
 695                                    uint32_t flags,
 696                                    struct ip_service_name **dclist,
 697                                    int num_dcs,
 698                                    struct netr_DsRGetDCNameInfo **info)
 699 {
 700         /* FIXME: code here */
 701
 702         return NT_STATUS_NOT_SUPPORTED;
 703 }
 704
 705 /****************************************************************
 706 ****************************************************************/
 707
 708 static NTSTATUS dsgetdcname_rediscover(TALLOC_CTX *mem_ctx,
 709                                        const char *domain_name,
 710                                        struct GUID *domain_guid,
 711                                        uint32_t flags,
 712                                        const char *site_name,
 713                                        struct netr_DsRGetDCNameInfo **info)
 714 {
 715         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 716         struct ip_service_name *dclist;
 717         int num_dcs;
 718
 719         DEBUG(10,("dsgetdcname_rediscover\n"));
 720
 721         if (flags & DS_IS_FLAT_NAME) {
 722
 723                 status = discover_dc_netbios(mem_ctx, domain_name, flags,
 724                                              &dclist, &num_dcs);
 725                 NT_STATUS_NOT_OK_RETURN(status);
 726
 727                 return process_dc_netbios(mem_ctx, domain_name, flags,
 728                                           &dclist, num_dcs, info);
 729         }
 730
 731         if (flags & DS_IS_DNS_NAME) {
 732
 733                 status = discover_dc_dns(mem_ctx, domain_name, domain_guid,
 734                                          flags, site_name, &dclist, &num_dcs);
 735                 NT_STATUS_NOT_OK_RETURN(status);
 736
 737                 return process_dc_dns(mem_ctx, domain_name, flags,
 738                                       dclist, num_dcs, info);
 739         }
 740
 741         status = discover_dc_dns(mem_ctx, domain_name, domain_guid, flags,
 742                                  site_name, &dclist, &num_dcs);
 743
 744         if (NT_STATUS_IS_OK(status) && num_dcs != 0) {
 745
 746                 status = process_dc_dns(mem_ctx, domain_name, flags, dclist,
 747                                         num_dcs, info);
 748                 if (NT_STATUS_IS_OK(status)) {
 749                         return status;
 750                 }
 751         }
 752
 753         status = discover_dc_netbios(mem_ctx, domain_name, flags, &dclist,
 754                                      &num_dcs);
 755         NT_STATUS_NOT_OK_RETURN(status);
 756
 757         return process_dc_netbios(mem_ctx, domain_name, flags, &dclist,
 758                                   num_dcs, info);
 759 }
 760
 761 /********************************************************************
 762  dsgetdcname.
 763
 764  This will be the only public function here.
 765 ********************************************************************/
 766
 767 NTSTATUS dsgetdcname(TALLOC_CTX *mem_ctx,
 768                      const char *domain_name,
 769                      struct GUID *domain_guid,
 770                      const char *site_name,
 771                      uint32_t flags,
 772                      struct netr_DsRGetDCNameInfo **info)
 773 {
 774         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 775         struct netr_DsRGetDCNameInfo *myinfo = NULL;
 776
 777         DEBUG(10,("dsgetdcname: domain_name: %s, "
 778                   "domain_guid: %s, site_name: %s, flags: 0x%08x\n",
 779                   domain_name,
 780                   domain_guid ? GUID_string(mem_ctx, domain_guid) : "(null)",
 781                   site_name, flags));
 782
 783         *info = NULL;
 784
 785         if (!check_allowed_required_flags(flags)) {
 786                 DEBUG(0,("invalid flags specified\n"));
 787                 return NT_STATUS_INVALID_PARAMETER;
 788         }
 789
 790         if (flags & DS_FORCE_REDISCOVERY) {
 791                 goto rediscover;
 792         }
 793
 794         status = dsgetdcname_cached(mem_ctx, domain_name, domain_guid,
 795                                     flags, site_name, &myinfo);
 796         if (NT_STATUS_IS_OK(status)) {
 797                 *info = myinfo;
 798                 return status;
 799         }
 800
 801         if (flags & DS_BACKGROUND_ONLY) {
 802                 return status;
 803         }
 804
 805  rediscover:
 806         status = dsgetdcname_rediscover(mem_ctx, domain_name,
 807                                         domain_guid, flags, site_name,
 808                                         &myinfo);
 809
 810         if (NT_STATUS_IS_OK(status)) {
 811                 dsgetdcname_cache_store(mem_ctx, domain_name, myinfo);
 812                 *info = myinfo;
 813         }
 814
 815         return status;
 816 }