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 nbt_cldap_netlogon_5 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(mem_ctx, 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 & NBT_SERVER_PDC);
 229
 230         if (req_flags & DS_GC_SERVER_REQUIRED)
 231                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_GC);
 232
 233         if (req_flags & DS_ONLY_LDAP_NEEDED)
 234                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_LDAP);
 235
 236         if ((req_flags & DS_DIRECTORY_SERVICE_REQUIRED) ||
 237             (req_flags & DS_DIRECTORY_SERVICE_PREFERRED))
 238                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_DS);
 239
 240         if (req_flags & DS_KDC_REQUIRED)
 241                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_KDC);
 242
 243         if (req_flags & DS_TIMESERV_REQUIRED)
 244                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_TIMESERV);
 245
 246         if (req_flags & DS_WRITABLE_REQUIRED)
 247                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_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 *returned_count)
 395 {
 396         NTSTATUS status;
 397         enum nbt_name_type name_type = NBT_NAME_LOGON;
 398         struct ip_service *iplist;
 399         int i;
 400         struct ip_service_name *dclist = NULL;
 401         int count;
 402
 403         *returned_dclist = NULL;
 404         *returned_count = 0;
 405
 406         if (lp_disable_netbios()) {
 407                 return NT_STATUS_NOT_SUPPORTED;
 408         }
 409
 410         if (flags & DS_PDC_REQUIRED) {
 411                 name_type = NBT_NAME_PDC;
 412         }
 413
 414         status = internal_resolve_name(domain_name, name_type, NULL,
 415                                        &iplist, &count,
 416                                        "lmhosts wins bcast");
 417         if (!NT_STATUS_IS_OK(status)) {
 418                 DEBUG(10,("discover_dc_netbios: failed to find DC\n"));
 419                 return status;
 420         }
 421
 422         dclist = TALLOC_ZERO_ARRAY(mem_ctx, struct ip_service_name, count);
 423         if (!dclist) {
 424                 return NT_STATUS_NO_MEMORY;
 425         }
 426
 427         for (i=0; i<count; i++) {
 428
 429                 char addr[INET6_ADDRSTRLEN];
 430                 struct ip_service_name *r = &dclist[i];
 431
 432                 print_sockaddr(addr, sizeof(addr),
 433                                &iplist[i].ss);
 434
 435                 r->ss   = iplist[i].ss;
 436                 r->port = iplist[i].port;
 437                 r->hostname = talloc_strdup(mem_ctx, addr);
 438                 if (!r->hostname) {
 439                         return NT_STATUS_NO_MEMORY;
 440                 }
 441
 442         }
 443
 444         *returned_dclist = dclist;
 445         *returned_count = count;
 446
 447         return NT_STATUS_OK;
 448 }
 449
 450 /****************************************************************
 451 ****************************************************************/
 452
 453 static NTSTATUS discover_dc_dns(TALLOC_CTX *mem_ctx,
 454                                 const char *domain_name,
 455                                 struct GUID *domain_guid,
 456                                 uint32_t flags,
 457                                 const char *site_name,
 458                                 struct ip_service_name **returned_dclist,
 459                                 int *return_count)
 460 {
 461         int i, j;
 462         NTSTATUS status;
 463         struct dns_rr_srv *dcs = NULL;
 464         int numdcs = 0;
 465         int numaddrs = 0;
 466         struct ip_service_name *dclist = NULL;
 467         int count = 0;
 468
 469         if ((!(flags & DS_DIRECTORY_SERVICE_REQUIRED)) &&
 470             (!(flags & DS_KDC_REQUIRED)) &&
 471             (!(flags & DS_GC_SERVER_REQUIRED)) &&
 472             (!(flags & DS_PDC_REQUIRED))) {
 473                 DEBUG(1,("discover_dc_dns: invalid flags\n"));
 474                 return NT_STATUS_INVALID_PARAMETER;
 475         }
 476
 477         if (flags & DS_PDC_REQUIRED) {
 478                 status = ads_dns_query_pdc(mem_ctx, domain_name,
 479                                            &dcs, &numdcs);
 480         } else if (flags & DS_GC_SERVER_REQUIRED) {
 481                 status = ads_dns_query_gcs(mem_ctx, domain_name, site_name,
 482                                            &dcs, &numdcs);
 483         } else if (flags & DS_KDC_REQUIRED) {
 484                 status = ads_dns_query_kdcs(mem_ctx, domain_name, site_name,
 485                                             &dcs, &numdcs);
 486         } else if (flags & DS_DIRECTORY_SERVICE_REQUIRED) {
 487                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 488                                            &dcs, &numdcs);
 489         } else if (domain_guid) {
 490                 status = ads_dns_query_dcs_guid(mem_ctx, domain_name,
 491                                                 domain_guid, &dcs, &numdcs);
 492         } else {
 493                 /* FIXME: ? */
 494                 DEBUG(1,("discover_dc_dns: not enough input\n"));
 495                 status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 496         }
 497
 498         if (!NT_STATUS_IS_OK(status)) {
 499                 return status;
 500         }
 501
 502         if (numdcs == 0) {
 503                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 504         }
 505
 506         for (i=0;i<numdcs;i++) {
 507                 numaddrs += MAX(dcs[i].num_ips,1);
 508         }
 509
 510         dclist = TALLOC_ZERO_ARRAY(mem_ctx,
 511                                    struct ip_service_name,
 512                                    numaddrs);
 513         if (!dclist) {
 514                 return NT_STATUS_NO_MEMORY;
 515         }
 516
 517         /* now unroll the list of IP addresses */
 518
 519         *return_count = 0;
 520         i = 0;
 521         j = 0;
 522
 523         while ((i < numdcs) && (count < numaddrs)) {
 524
 525                 struct ip_service_name *r = &dclist[count];
 526
 527                 r->port = dcs[count].port;
 528                 r->hostname = dcs[count].hostname;
 529
 530                 if (!(flags & DS_IP_REQUIRED)) {
 531                         count++;
 532                         continue;
 533                 }
 534
 535                 /* If we don't have an IP list for a name, lookup it up */
 536
 537                 if (!dcs[i].ss_s) {
 538                         interpret_string_addr(&r->ss, dcs[i].hostname, 0);
 539                         i++;
 540                         j = 0;
 541                 } else {
 542                         /* use the IP addresses from the SRV sresponse */
 543
 544                         if (j >= dcs[i].num_ips) {
 545                                 i++;
 546                                 j = 0;
 547                                 continue;
 548                         }
 549
 550                         r->ss = dcs[i].ss_s[j];
 551                         j++;
 552                 }
 553
 554                 /* make sure it is a valid IP.  I considered checking the
 555                  * negative connection cache, but this is the wrong place for
 556                  * it.  Maybe only as a hac.  After think about it, if all of
 557                  * the IP addresses retuend from DNS are dead, what hope does a
 558                  * netbios name lookup have?  The standard reason for falling
 559                  * back to netbios lookups is that our DNS server doesn't know
 560                  * anything about the DC's   -- jerry */
 561
 562                 if (!is_zero_addr(&r->ss)) {
 563                         count++;
 564                         continue;
 565                 }
 566         }
 567
 568         *returned_dclist = dclist;
 569         *return_count = count;
 570
 571         if (count > 0) {
 572                 return NT_STATUS_OK;
 573         }
 574
 575         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 576 }
 577
 578 /****************************************************************
 579 ****************************************************************/
 580
 581 static NTSTATUS make_domain_controller_info(TALLOC_CTX *mem_ctx,
 582                                             const char *dc_unc,
 583                                             const char *dc_address,
 584                                             uint32_t dc_address_type,
 585                                             const struct GUID *domain_guid,
 586                                             const char *domain_name,
 587                                             const char *forest_name,
 588                                             uint32_t flags,
 589                                             const char *dc_site_name,
 590                                             const char *client_site_name,
 591                                             struct netr_DsRGetDCNameInfo **info_out)
 592 {
 593         struct netr_DsRGetDCNameInfo *info;
 594
 595         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 596         NT_STATUS_HAVE_NO_MEMORY(info);
 597
 598         if (dc_unc) {
 599                 info->dc_unc = talloc_strdup(mem_ctx, dc_unc);
 600                 NT_STATUS_HAVE_NO_MEMORY(info->dc_unc);
 601         }
 602
 603         if (dc_address) {
 604                 info->dc_address = talloc_strdup(mem_ctx, dc_address);
 605                 NT_STATUS_HAVE_NO_MEMORY(info->dc_address);
 606         }
 607
 608         info->dc_address_type = dc_address_type;
 609
 610         if (domain_guid) {
 611                 info->domain_guid = *domain_guid;
 612         }
 613
 614         if (domain_name) {
 615                 info->domain_name = talloc_strdup(mem_ctx, domain_name);
 616                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 617         }
 618
 619         if (forest_name) {
 620                 info->forest_name = talloc_strdup(mem_ctx, forest_name);
 621                 NT_STATUS_HAVE_NO_MEMORY(info->forest_name);
 622         }
 623
 624         info->dc_flags = flags;
 625
 626         if (dc_site_name) {
 627                 info->dc_site_name = talloc_strdup(mem_ctx, dc_site_name);
 628                 NT_STATUS_HAVE_NO_MEMORY(info->dc_site_name);
 629         }
 630
 631         if (client_site_name) {
 632                 info->client_site_name = talloc_strdup(mem_ctx,
 633                                                        client_site_name);
 634                 NT_STATUS_HAVE_NO_MEMORY(info->client_site_name);
 635         }
 636
 637         *info_out = info;
 638
 639         return NT_STATUS_OK;
 640 }
 641
 642 /****************************************************************
 643 ****************************************************************/
 644
 645 static NTSTATUS process_dc_dns(TALLOC_CTX *mem_ctx,
 646                                const char *domain_name,
 647                                uint32_t flags,
 648                                struct ip_service_name *dclist,
 649                                int num_dcs,
 650                                struct netr_DsRGetDCNameInfo **info)
 651 {
 652         int i = 0;
 653         bool valid_dc = false;
 654         struct nbt_cldap_netlogon_5 r;
 655         const char *dc_hostname, *dc_domain_name;
 656         const char *dc_address;
 657         uint32_t dc_address_type;
 658         uint32_t dc_flags;
 659
 660         for (i=0; i<num_dcs; i++) {
 661
 662                 ZERO_STRUCT(r);
 663
 664                 DEBUG(10,("LDAP ping to %s\n", dclist[i].hostname));
 665
 666                 if ((ads_cldap_netlogon(mem_ctx, dclist[i].hostname,
 667                                         domain_name, &r)) &&
 668                     (check_cldap_reply_required_flags(r.server_type, flags))) {
 669                         valid_dc = true;
 670                         break;
 671                 }
 672
 673                 continue;
 674         }
 675
 676         if (!valid_dc) {
 677                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 678         }
 679
 680         dc_flags = r.server_type;
 681
 682         if (flags & DS_RETURN_FLAT_NAME) {
 683                 if (!strlen(r.pdc_name) || !strlen(r.domain)) {
 684                         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 685                 }
 686                 dc_hostname = r.pdc_name;
 687                 dc_domain_name = r.domain;
 688         } else if (flags & DS_RETURN_DNS_NAME) {
 689                 if (!strlen(r.pdc_dns_name) || !strlen(r.dns_domain)) {
 690                         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 691                 }
 692                 dc_hostname = r.pdc_dns_name;
 693                 dc_domain_name = r.dns_domain;
 694                 dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
 695         } else {
 696                 /* FIXME */
 697                 dc_hostname = r.pdc_dns_name;
 698                 dc_domain_name = r.dns_domain;
 699                 dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
 700         }
 701
 702         if (flags & DS_IP_REQUIRED) {
 703                 char addr[INET6_ADDRSTRLEN];
 704                 print_sockaddr(addr, sizeof(addr), &dclist[i].ss);
 705                 dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
 706                                                 addr);
 707                 dc_address_type = DS_ADDRESS_TYPE_INET;
 708         } else {
 709                 dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
 710                                              r.pdc_name);
 711                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 712         }
 713         NT_STATUS_HAVE_NO_MEMORY(dc_address);
 714
 715         if (r.forest) {
 716                 dc_flags |= DS_DNS_FOREST;
 717         }
 718
 719         return make_domain_controller_info(mem_ctx,
 720                                            dc_hostname,
 721                                            dc_address,
 722                                            dc_address_type,
 723                                            &r.domain_uuid,
 724                                            dc_domain_name,
 725                                            r.forest,
 726                                            dc_flags,
 727                                            r.server_site,
 728                                            r.client_site,
 729                                            info);
 730
 731 }
 732
 733 /****************************************************************
 734 ****************************************************************/
 735
 736 static struct event_context *ev_context(void)
 737 {
 738         static struct event_context *ctx;
 739
 740         if (!ctx && !(ctx = event_context_init(NULL))) {
 741                 smb_panic("Could not init event context");
 742         }
 743         return ctx;
 744 }
 745
 746 /****************************************************************
 747 ****************************************************************/
 748
 749 static struct messaging_context *msg_context(TALLOC_CTX *mem_ctx)
 750 {
 751         static struct messaging_context *ctx;
 752
 753         if (!ctx && !(ctx = messaging_init(mem_ctx, server_id_self(),
 754                                            ev_context()))) {
 755                 smb_panic("Could not init messaging context");
 756         }
 757         return ctx;
 758 }
 759
 760 /****************************************************************
 761 ****************************************************************/
 762
 763 static NTSTATUS process_dc_netbios(TALLOC_CTX *mem_ctx,
 764                                    const char *domain_name,
 765                                    uint32_t flags,
 766                                    struct ip_service_name *dclist,
 767                                    int num_dcs,
 768                                    struct netr_DsRGetDCNameInfo **info)
 769 {
 770         struct sockaddr_storage ss;
 771         struct ip_service ip_list;
 772         enum nbt_name_type name_type = NBT_NAME_LOGON;
 773
 774         int i;
 775         const char *dc_hostname, *dc_domain_name;
 776         const char *dc_address;
 777         uint32_t dc_address_type;
 778         uint32_t dc_flags = 0;
 779         const char *dc_name = NULL;
 780         fstring tmp_dc_name;
 781         struct messaging_context *msg_ctx = msg_context(mem_ctx);
 782
 783         if (flags & DS_PDC_REQUIRED) {
 784                 name_type = NBT_NAME_PDC;
 785         }
 786
 787         DEBUG(10,("process_dc_netbios\n"));
 788
 789         for (i=0; i<num_dcs; i++) {
 790
 791                 ip_list.ss = dclist[i].ss;
 792                 ip_list.port = 0;
 793
 794                 if (!interpret_string_addr(&ss, dclist[i].hostname, AI_NUMERICHOST)) {
 795                         return NT_STATUS_UNSUCCESSFUL;
 796                 }
 797
 798                 if (send_getdc_request(mem_ctx, msg_ctx,
 799                                        &dclist[i].ss, domain_name, NULL))
 800                 {
 801                         int k;
 802                         smb_msleep(100);
 803                         for (k=0; k<5; k++) {
 804                                 if (receive_getdc_response(mem_ctx,
 805                                                            &dclist[i].ss,
 806                                                            domain_name,
 807                                                            &dc_name)) {
 808                                         namecache_store(dc_name, NBT_NAME_SERVER, 1, &ip_list);
 809                                         dc_hostname = dc_name;
 810                                         dc_domain_name = talloc_strdup_upper(mem_ctx, domain_name);
 811                                         NT_STATUS_HAVE_NO_MEMORY(dc_domain_name);
 812                                         goto make_reply;
 813                                 }
 814                                 smb_msleep(500);
 815                         }
 816                 }
 817
 818                 if (name_status_find(domain_name,
 819                                      name_type,
 820                                      NBT_NAME_SERVER,
 821                                      &dclist[i].ss,
 822                                      tmp_dc_name))
 823                 {
 824                         dc_hostname = tmp_dc_name;
 825                         dc_domain_name = talloc_strdup_upper(mem_ctx, domain_name);
 826                         namecache_store(dc_name, NBT_NAME_SERVER, 1, &ip_list);
 827                         goto make_reply;
 828                 }
 829         }
 830
 831         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 832
 833  make_reply:
 834
 835         if (flags & DS_IP_REQUIRED) {
 836                 char addr[INET6_ADDRSTRLEN];
 837                 print_sockaddr(addr, sizeof(addr), &dclist[i].ss);
 838                 dc_address = talloc_asprintf(mem_ctx, "\\\\%s", addr);
 839                 dc_address_type = DS_ADDRESS_TYPE_INET;
 840         } else {
 841                 dc_address = talloc_asprintf(mem_ctx, "\\\\%s", dc_hostname);
 842                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 843         }
 844
 845         if (flags & DS_PDC_REQUIRED) {
 846                 dc_flags |= NBT_SERVER_PDC | NBT_SERVER_WRITABLE;
 847         }
 848
 849         return make_domain_controller_info(mem_ctx,
 850                                            dc_hostname,
 851                                            dc_address,
 852                                            dc_address_type,
 853                                            NULL,
 854                                            dc_domain_name,
 855                                            NULL,
 856                                            dc_flags,
 857                                            NULL,
 858                                            NULL,
 859                                            info);
 860 }
 861
 862 /****************************************************************
 863 ****************************************************************/
 864
 865 static NTSTATUS dsgetdcname_rediscover(TALLOC_CTX *mem_ctx,
 866                                        const char *domain_name,
 867                                        struct GUID *domain_guid,
 868                                        uint32_t flags,
 869                                        const char *site_name,
 870                                        struct netr_DsRGetDCNameInfo **info)
 871 {
 872         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 873         struct ip_service_name *dclist = NULL;
 874         int num_dcs;
 875
 876         DEBUG(10,("dsgetdcname_rediscover\n"));
 877
 878         if (flags & DS_IS_FLAT_NAME) {
 879
 880                 status = discover_dc_netbios(mem_ctx, domain_name, flags,
 881                                              &dclist, &num_dcs);
 882                 NT_STATUS_NOT_OK_RETURN(status);
 883
 884                 return process_dc_netbios(mem_ctx, domain_name, flags,
 885                                           dclist, num_dcs, info);
 886         }
 887
 888         if (flags & DS_IS_DNS_NAME) {
 889
 890                 status = discover_dc_dns(mem_ctx, domain_name, domain_guid,
 891                                          flags, site_name, &dclist, &num_dcs);
 892                 NT_STATUS_NOT_OK_RETURN(status);
 893
 894                 return process_dc_dns(mem_ctx, domain_name, flags,
 895                                       dclist, num_dcs, info);
 896         }
 897
 898         status = discover_dc_dns(mem_ctx, domain_name, domain_guid, flags,
 899                                  site_name, &dclist, &num_dcs);
 900
 901         if (NT_STATUS_IS_OK(status) && num_dcs != 0) {
 902
 903                 status = process_dc_dns(mem_ctx, domain_name, flags, dclist,
 904                                         num_dcs, info);
 905                 if (NT_STATUS_IS_OK(status)) {
 906                         return status;
 907                 }
 908         }
 909
 910         status = discover_dc_netbios(mem_ctx, domain_name, flags, &dclist,
 911                                      &num_dcs);
 912         NT_STATUS_NOT_OK_RETURN(status);
 913
 914         return process_dc_netbios(mem_ctx, domain_name, flags, dclist,
 915                                   num_dcs, info);
 916 }
 917
 918 /********************************************************************
 919  dsgetdcname.
 920
 921  This will be the only public function here.
 922 ********************************************************************/
 923
 924 NTSTATUS dsgetdcname(TALLOC_CTX *mem_ctx,
 925                      const char *domain_name,
 926                      struct GUID *domain_guid,
 927                      const char *site_name,
 928                      uint32_t flags,
 929                      struct netr_DsRGetDCNameInfo **info)
 930 {
 931         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 932         struct netr_DsRGetDCNameInfo *myinfo = NULL;
 933
 934         DEBUG(10,("dsgetdcname: domain_name: %s, "
 935                   "domain_guid: %s, site_name: %s, flags: 0x%08x\n",
 936                   domain_name,
 937                   domain_guid ? GUID_string(mem_ctx, domain_guid) : "(null)",
 938                   site_name, flags));
 939
 940         *info = NULL;
 941
 942         if (!check_allowed_required_flags(flags)) {
 943                 DEBUG(0,("invalid flags specified\n"));
 944                 return NT_STATUS_INVALID_PARAMETER;
 945         }
 946
 947         if (flags & DS_FORCE_REDISCOVERY) {
 948                 goto rediscover;
 949         }
 950
 951         status = dsgetdcname_cached(mem_ctx, domain_name, domain_guid,
 952                                     flags, site_name, &myinfo);
 953         if (NT_STATUS_IS_OK(status)) {
 954                 *info = myinfo;
 955                 return status;
 956         }
 957
 958         if (flags & DS_BACKGROUND_ONLY) {
 959                 return status;
 960         }
 961
 962  rediscover:
 963         status = dsgetdcname_rediscover(mem_ctx, domain_name,
 964                                         domain_guid, flags, site_name,
 965                                         &myinfo);
 966
 967         if (NT_STATUS_IS_OK(status)) {
 968                 dsgetdcname_cache_store(mem_ctx, domain_name, myinfo);
 969                 *info = myinfo;
 970         }
 971
 972         return status;
 973 }