source3/libsmb/dsgetdcname.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    dsgetdcname
   5
   6    Copyright (C) Gerald Carter 2006
   7    Copyright (C) Guenther Deschner 2007-2008
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24
  25 #define DSGETDCNAME_FMT "DSGETDCNAME/DOMAIN/%s"
  26 /* 15 minutes */
  27 #define DSGETDCNAME_CACHE_TTL   60*15
  28
  29 struct ip_service_name {
  30         struct sockaddr_storage ss;
  31         unsigned port;
  32         const char *hostname;
  33 };
  34
  35 static NTSTATUS make_dc_info_from_cldap_reply(TALLOC_CTX *mem_ctx,
  36                                               uint32_t flags,
  37                                               struct sockaddr_storage *ss,
  38                                               struct NETLOGON_SAM_LOGON_RESPONSE_EX *r,
  39                                               struct netr_DsRGetDCNameInfo **info);
  40
  41 /****************************************************************
  42 ****************************************************************/
  43
  44 void debug_dsdcinfo_flags(int lvl, uint32_t flags)
  45 {
  46         DEBUG(lvl,("debug_dsdcinfo_flags: 0x%08x\n\t", flags));
  47
  48         if (flags & DS_FORCE_REDISCOVERY)
  49                 DEBUGADD(lvl,("DS_FORCE_REDISCOVERY "));
  50         if (flags & 0x000000002)
  51                 DEBUGADD(lvl,("0x00000002 "));
  52         if (flags & 0x000000004)
  53                 DEBUGADD(lvl,("0x00000004 "));
  54         if (flags & 0x000000008)
  55                 DEBUGADD(lvl,("0x00000008 "));
  56         if (flags & DS_DIRECTORY_SERVICE_REQUIRED)
  57                 DEBUGADD(lvl,("DS_DIRECTORY_SERVICE_REQUIRED "));
  58         if (flags & DS_DIRECTORY_SERVICE_PREFERRED)
  59                 DEBUGADD(lvl,("DS_DIRECTORY_SERVICE_PREFERRED "));
  60         if (flags & DS_GC_SERVER_REQUIRED)
  61                 DEBUGADD(lvl,("DS_GC_SERVER_REQUIRED "));
  62         if (flags & DS_PDC_REQUIRED)
  63                 DEBUGADD(lvl,("DS_PDC_REQUIRED "));
  64         if (flags & DS_BACKGROUND_ONLY)
  65                 DEBUGADD(lvl,("DS_BACKGROUND_ONLY "));
  66         if (flags & DS_IP_REQUIRED)
  67                 DEBUGADD(lvl,("DS_IP_REQUIRED "));
  68         if (flags & DS_KDC_REQUIRED)
  69                 DEBUGADD(lvl,("DS_KDC_REQUIRED "));
  70         if (flags & DS_TIMESERV_REQUIRED)
  71                 DEBUGADD(lvl,("DS_TIMESERV_REQUIRED "));
  72         if (flags & DS_WRITABLE_REQUIRED)
  73                 DEBUGADD(lvl,("DS_WRITABLE_REQUIRED "));
  74         if (flags & DS_GOOD_TIMESERV_PREFERRED)
  75                 DEBUGADD(lvl,("DS_GOOD_TIMESERV_PREFERRED "));
  76         if (flags & DS_AVOID_SELF)
  77                 DEBUGADD(lvl,("DS_AVOID_SELF "));
  78         if (flags & DS_ONLY_LDAP_NEEDED)
  79                 DEBUGADD(lvl,("DS_ONLY_LDAP_NEEDED "));
  80         if (flags & DS_IS_FLAT_NAME)
  81                 DEBUGADD(lvl,("DS_IS_FLAT_NAME "));
  82         if (flags & DS_IS_DNS_NAME)
  83                 DEBUGADD(lvl,("DS_IS_DNS_NAME "));
  84         if (flags & 0x00040000)
  85                 DEBUGADD(lvl,("0x00040000 "));
  86         if (flags & 0x00080000)
  87                 DEBUGADD(lvl,("0x00080000 "));
  88         if (flags & 0x00100000)
  89                 DEBUGADD(lvl,("0x00100000 "));
  90         if (flags & 0x00200000)
  91                 DEBUGADD(lvl,("0x00200000 "));
  92         if (flags & 0x00400000)
  93                 DEBUGADD(lvl,("0x00400000 "));
  94         if (flags & 0x00800000)
  95                 DEBUGADD(lvl,("0x00800000 "));
  96         if (flags & 0x01000000)
  97                 DEBUGADD(lvl,("0x01000000 "));
  98         if (flags & 0x02000000)
  99                 DEBUGADD(lvl,("0x02000000 "));
 100         if (flags & 0x04000000)
 101                 DEBUGADD(lvl,("0x04000000 "));
 102         if (flags & 0x08000000)
 103                 DEBUGADD(lvl,("0x08000000 "));
 104         if (flags & 0x10000000)
 105                 DEBUGADD(lvl,("0x10000000 "));
 106         if (flags & 0x20000000)
 107                 DEBUGADD(lvl,("0x20000000 "));
 108         if (flags & DS_RETURN_DNS_NAME)
 109                 DEBUGADD(lvl,("DS_RETURN_DNS_NAME "));
 110         if (flags & DS_RETURN_FLAT_NAME)
 111                 DEBUGADD(lvl,("DS_RETURN_FLAT_NAME "));
 112         if (flags)
 113                 DEBUGADD(lvl,("\n"));
 114 }
 115
 116 /****************************************************************
 117 ****************************************************************/
 118
 119 static char *dsgetdcname_cache_key(TALLOC_CTX *mem_ctx, const char *domain)
 120 {
 121         if (!domain) {
 122                 return NULL;
 123         }
 124
 125         return talloc_asprintf_strupper_m(mem_ctx, DSGETDCNAME_FMT, domain);
 126 }
 127
 128 /****************************************************************
 129 ****************************************************************/
 130
 131 static NTSTATUS dsgetdcname_cache_delete(TALLOC_CTX *mem_ctx,
 132                                         const char *domain_name)
 133 {
 134         char *key;
 135
 136         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 137         if (!key) {
 138                 return NT_STATUS_NO_MEMORY;
 139         }
 140
 141         if (!gencache_del(key)) {
 142                 return NT_STATUS_UNSUCCESSFUL;
 143         }
 144
 145         return NT_STATUS_OK;
 146 }
 147
 148 /****************************************************************
 149 ****************************************************************/
 150
 151 static NTSTATUS dsgetdcname_cache_store(TALLOC_CTX *mem_ctx,
 152                                         const char *domain_name,
 153                                         const DATA_BLOB *blob)
 154 {
 155         time_t expire_time;
 156         char *key;
 157         bool ret = false;
 158
 159         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 160         if (!key) {
 161                 return NT_STATUS_NO_MEMORY;
 162         }
 163
 164         expire_time = time(NULL) + DSGETDCNAME_CACHE_TTL;
 165
 166         ret = gencache_set_data_blob(key, blob, expire_time);
 167
 168         return ret ? NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 169 }
 170
 171 /****************************************************************
 172 ****************************************************************/
 173
 174 static NTSTATUS store_cldap_reply(TALLOC_CTX *mem_ctx,
 175                                   uint32_t flags,
 176                                   struct sockaddr_storage *ss,
 177                                   uint32_t nt_version,
 178                                   struct NETLOGON_SAM_LOGON_RESPONSE_EX *r)
 179 {
 180         DATA_BLOB blob;
 181         enum ndr_err_code ndr_err;
 182         NTSTATUS status;
 183         char addr[INET6_ADDRSTRLEN];
 184
 185        print_sockaddr(addr, sizeof(addr), ss);
 186
 187         /* FIXME */
 188         r->sockaddr_size = 0x10; /* the w32 winsock addr size */
 189         r->sockaddr.sockaddr_family = 2; /* AF_INET */
 190         r->sockaddr.pdc_ip = talloc_strdup(mem_ctx, addr);
 191
 192         ndr_err = ndr_push_struct_blob(&blob, mem_ctx, NULL, r,
 193                        (ndr_push_flags_fn_t)ndr_push_NETLOGON_SAM_LOGON_RESPONSE_EX);
 194         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 195                 return ndr_map_error2ntstatus(ndr_err);
 196         }
 197
 198         if (r->domain) {
 199                 status = dsgetdcname_cache_store(mem_ctx, r->domain, &blob);
 200                 if (!NT_STATUS_IS_OK(status)) {
 201                         goto done;
 202                 }
 203                 if (r->client_site) {
 204                         sitename_store(r->domain, r->client_site);
 205                 }
 206         }
 207         if (r->dns_domain) {
 208                 status = dsgetdcname_cache_store(mem_ctx, r->dns_domain, &blob);
 209                 if (!NT_STATUS_IS_OK(status)) {
 210                         goto done;
 211                 }
 212                 if (r->client_site) {
 213                         sitename_store(r->dns_domain, r->client_site);
 214                 }
 215         }
 216
 217         status = NT_STATUS_OK;
 218
 219  done:
 220         data_blob_free(&blob);
 221
 222         return status;
 223 }
 224
 225 /****************************************************************
 226 ****************************************************************/
 227
 228 static uint32_t get_cldap_reply_server_flags(struct netlogon_samlogon_response *r,
 229                                              uint32_t nt_version)
 230 {
 231         switch (nt_version & 0x0000001f) {
 232                 case 0:
 233                 case 1:
 234                 case 16:
 235                 case 17:
 236                         return 0;
 237                 case 2:
 238                 case 3:
 239                 case 18:
 240                 case 19:
 241                         return r->data.nt5.server_type;
 242                 case 4:
 243                 case 5:
 244                 case 6:
 245                 case 7:
 246                         return r->data.nt5_ex.server_type;
 247                 case 8:
 248                 case 9:
 249                 case 10:
 250                 case 11:
 251                 case 12:
 252                 case 13:
 253                 case 14:
 254                 case 15:
 255                         return r->data.nt5_ex.server_type;
 256                 case 20:
 257                 case 21:
 258                 case 22:
 259                 case 23:
 260                 case 24:
 261                 case 25:
 262                 case 26:
 263                 case 27:
 264                 case 28:
 265                         return r->data.nt5_ex.server_type;
 266                 case 29:
 267                 case 30:
 268                 case 31:
 269                         return r->data.nt5_ex.server_type;
 270                 default:
 271                         return 0;
 272         }
 273 }
 274
 275 /****************************************************************
 276 ****************************************************************/
 277
 278 #define RETURN_ON_FALSE(x) if (!(x)) return false;
 279
 280 static bool check_cldap_reply_required_flags(uint32_t ret_flags,
 281                                              uint32_t req_flags)
 282 {
 283         if (ret_flags == 0) {
 284                 return true;
 285         }
 286
 287         if (req_flags & DS_PDC_REQUIRED)
 288                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_PDC);
 289
 290         if (req_flags & DS_GC_SERVER_REQUIRED)
 291                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_GC);
 292
 293         if (req_flags & DS_ONLY_LDAP_NEEDED)
 294                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_LDAP);
 295
 296         if ((req_flags & DS_DIRECTORY_SERVICE_REQUIRED) ||
 297             (req_flags & DS_DIRECTORY_SERVICE_PREFERRED))
 298                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_DS);
 299
 300         if (req_flags & DS_KDC_REQUIRED)
 301                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_KDC);
 302
 303         if (req_flags & DS_TIMESERV_REQUIRED)
 304                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_TIMESERV);
 305
 306         if (req_flags & DS_WRITABLE_REQUIRED)
 307                 RETURN_ON_FALSE(ret_flags & NBT_SERVER_WRITABLE);
 308
 309         return true;
 310 }
 311
 312 /****************************************************************
 313 ****************************************************************/
 314
 315 static NTSTATUS dsgetdcname_cache_fetch(TALLOC_CTX *mem_ctx,
 316                                         const char *domain_name,
 317                                         const struct GUID *domain_guid,
 318                                         uint32_t flags,
 319                                         const char *site_name,
 320                                         struct netr_DsRGetDCNameInfo **info_p)
 321 {
 322         char *key;
 323         DATA_BLOB blob;
 324         enum ndr_err_code ndr_err;
 325         struct netr_DsRGetDCNameInfo *info;
 326         struct NETLOGON_SAM_LOGON_RESPONSE_EX r;
 327         NTSTATUS status;
 328
 329         key = dsgetdcname_cache_key(mem_ctx, domain_name);
 330         if (!key) {
 331                 return NT_STATUS_NO_MEMORY;
 332         }
 333
 334         if (!gencache_get_data_blob(key, &blob, NULL, NULL)) {
 335                 return NT_STATUS_NOT_FOUND;
 336         }
 337
 338         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 339         if (!info) {
 340                 return NT_STATUS_NO_MEMORY;
 341         }
 342
 343         ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, NULL, &r,
 344                       (ndr_pull_flags_fn_t)ndr_pull_NETLOGON_SAM_LOGON_RESPONSE_EX);
 345
 346         data_blob_free(&blob);
 347         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 348                 dsgetdcname_cache_delete(mem_ctx, domain_name);
 349                 return ndr_map_error2ntstatus(ndr_err);
 350         }
 351
 352         status = make_dc_info_from_cldap_reply(mem_ctx, flags, NULL,
 353                                                &r, &info);
 354         if (!NT_STATUS_IS_OK(status)) {
 355                 return status;
 356         }
 357
 358         if (DEBUGLEVEL >= 10) {
 359                 NDR_PRINT_DEBUG(netr_DsRGetDCNameInfo, info);
 360         }
 361
 362         /* check flags */
 363         if (!check_cldap_reply_required_flags(info->dc_flags, flags)) {
 364                 DEBUG(10,("invalid flags\n"));
 365                 return NT_STATUS_INVALID_PARAMETER;
 366         }
 367
 368         if ((flags & DS_IP_REQUIRED) &&
 369             (info->dc_address_type != DS_ADDRESS_TYPE_INET)) {
 370                 return NT_STATUS_INVALID_PARAMETER_MIX;
 371         }
 372
 373         *info_p = info;
 374
 375         return NT_STATUS_OK;
 376 }
 377
 378 /****************************************************************
 379 ****************************************************************/
 380
 381 static NTSTATUS dsgetdcname_cached(TALLOC_CTX *mem_ctx,
 382                                    struct messaging_context *msg_ctx,
 383                                    const char *domain_name,
 384                                    const struct GUID *domain_guid,
 385                                    uint32_t flags,
 386                                    const char *site_name,
 387                                    struct netr_DsRGetDCNameInfo **info)
 388 {
 389         NTSTATUS status;
 390
 391         status = dsgetdcname_cache_fetch(mem_ctx, domain_name, domain_guid,
 392                                          flags, site_name, info);
 393         if (!NT_STATUS_IS_OK(status)
 394             && !NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 395                 DEBUG(10,("dsgetdcname_cached: cache fetch failed with: %s\n",
 396                         nt_errstr(status)));
 397                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 398         }
 399
 400         if (flags & DS_BACKGROUND_ONLY) {
 401                 return status;
 402         }
 403
 404         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
 405                 struct netr_DsRGetDCNameInfo *dc_info;
 406
 407                 status = dsgetdcname(mem_ctx, msg_ctx, domain_name,
 408                                      domain_guid, site_name,
 409                                      flags | DS_FORCE_REDISCOVERY,
 410                                      &dc_info);
 411
 412                 if (!NT_STATUS_IS_OK(status)) {
 413                         return status;
 414                 }
 415
 416                 *info = dc_info;
 417         }
 418
 419         return status;
 420 }
 421
 422 /****************************************************************
 423 ****************************************************************/
 424
 425 static bool check_allowed_required_flags(uint32_t flags,
 426                                          const char *site_name)
 427 {
 428         uint32_t return_type = flags & (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME);
 429         uint32_t offered_type = flags & (DS_IS_FLAT_NAME|DS_IS_DNS_NAME);
 430         uint32_t query_type = flags & (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY);
 431
 432         /* FIXME: check for DSGETDC_VALID_FLAGS and check for excluse bits
 433          * (DS_PDC_REQUIRED, DS_KDC_REQUIRED, DS_GC_SERVER_REQUIRED) */
 434
 435         debug_dsdcinfo_flags(10, flags);
 436
 437         if ((flags & DS_TRY_NEXTCLOSEST_SITE) && site_name) {
 438                 return false;
 439         }
 440
 441         if (return_type == (DS_RETURN_FLAT_NAME|DS_RETURN_DNS_NAME)) {
 442                 return false;
 443         }
 444
 445         if (offered_type == (DS_IS_DNS_NAME|DS_IS_FLAT_NAME)) {
 446                 return false;
 447         }
 448
 449         if (query_type == (DS_BACKGROUND_ONLY|DS_FORCE_REDISCOVERY)) {
 450                 return false;
 451         }
 452
 453 #if 0
 454         if ((flags & DS_RETURN_DNS_NAME) && (!(flags & DS_IP_REQUIRED))) {
 455                 printf("gd: here5 \n");
 456                 return false;
 457         }
 458 #endif
 459         return true;
 460 }
 461
 462 /****************************************************************
 463 ****************************************************************/
 464
 465 static NTSTATUS discover_dc_netbios(TALLOC_CTX *mem_ctx,
 466                                     const char *domain_name,
 467                                     uint32_t flags,
 468                                     struct ip_service_name **returned_dclist,
 469                                     int *returned_count)
 470 {
 471         NTSTATUS status;
 472         enum nbt_name_type name_type = NBT_NAME_LOGON;
 473         struct ip_service *iplist;
 474         int i;
 475         struct ip_service_name *dclist = NULL;
 476         int count;
 477
 478         *returned_dclist = NULL;
 479         *returned_count = 0;
 480
 481         if (lp_disable_netbios()) {
 482                 return NT_STATUS_NOT_SUPPORTED;
 483         }
 484
 485         if (flags & DS_PDC_REQUIRED) {
 486                 name_type = NBT_NAME_PDC;
 487         }
 488
 489         status = internal_resolve_name(domain_name, name_type, NULL,
 490                                        &iplist, &count,
 491                                        "lmhosts wins bcast");
 492         if (!NT_STATUS_IS_OK(status)) {
 493                 DEBUG(10,("discover_dc_netbios: failed to find DC\n"));
 494                 return status;
 495         }
 496
 497         dclist = TALLOC_ZERO_ARRAY(mem_ctx, struct ip_service_name, count);
 498         if (!dclist) {
 499                 return NT_STATUS_NO_MEMORY;
 500         }
 501
 502         for (i=0; i<count; i++) {
 503
 504                 char addr[INET6_ADDRSTRLEN];
 505                 struct ip_service_name *r = &dclist[i];
 506
 507                 print_sockaddr(addr, sizeof(addr),
 508                                &iplist[i].ss);
 509
 510                 r->ss   = iplist[i].ss;
 511                 r->port = iplist[i].port;
 512                 r->hostname = talloc_strdup(mem_ctx, addr);
 513                 if (!r->hostname) {
 514                         return NT_STATUS_NO_MEMORY;
 515                 }
 516
 517         }
 518
 519         *returned_dclist = dclist;
 520         *returned_count = count;
 521
 522         return NT_STATUS_OK;
 523 }
 524
 525 /****************************************************************
 526 ****************************************************************/
 527
 528 static NTSTATUS discover_dc_dns(TALLOC_CTX *mem_ctx,
 529                                 const char *domain_name,
 530                                 const struct GUID *domain_guid,
 531                                 uint32_t flags,
 532                                 const char *site_name,
 533                                 struct ip_service_name **returned_dclist,
 534                                 int *return_count)
 535 {
 536         int i, j;
 537         NTSTATUS status;
 538         struct dns_rr_srv *dcs = NULL;
 539         int numdcs = 0;
 540         int numaddrs = 0;
 541         struct ip_service_name *dclist = NULL;
 542         int count = 0;
 543
 544         if (flags & DS_PDC_REQUIRED) {
 545                 status = ads_dns_query_pdc(mem_ctx, domain_name,
 546                                            &dcs, &numdcs);
 547         } else if (flags & DS_GC_SERVER_REQUIRED) {
 548                 status = ads_dns_query_gcs(mem_ctx, domain_name, site_name,
 549                                            &dcs, &numdcs);
 550         } else if (flags & DS_KDC_REQUIRED) {
 551                 status = ads_dns_query_kdcs(mem_ctx, domain_name, site_name,
 552                                             &dcs, &numdcs);
 553         } else if (flags & DS_DIRECTORY_SERVICE_REQUIRED) {
 554                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 555                                            &dcs, &numdcs);
 556         } else if (domain_guid) {
 557                 status = ads_dns_query_dcs_guid(mem_ctx, domain_name,
 558                                                 domain_guid, &dcs, &numdcs);
 559         } else {
 560                 status = ads_dns_query_dcs(mem_ctx, domain_name, site_name,
 561                                            &dcs, &numdcs);
 562         }
 563
 564         if (!NT_STATUS_IS_OK(status)) {
 565                 return status;
 566         }
 567
 568         if (numdcs == 0) {
 569                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 570         }
 571
 572         for (i=0;i<numdcs;i++) {
 573                 numaddrs += MAX(dcs[i].num_ips,1);
 574         }
 575
 576         dclist = TALLOC_ZERO_ARRAY(mem_ctx,
 577                                    struct ip_service_name,
 578                                    numaddrs);
 579         if (!dclist) {
 580                 return NT_STATUS_NO_MEMORY;
 581         }
 582
 583         /* now unroll the list of IP addresses */
 584
 585         *return_count = 0;
 586         i = 0;
 587         j = 0;
 588
 589         while ((i < numdcs) && (count < numaddrs)) {
 590
 591                 struct ip_service_name *r = &dclist[count];
 592
 593                 r->port = dcs[i].port;
 594                 r->hostname = dcs[i].hostname;
 595
 596                 /* If we don't have an IP list for a name, lookup it up */
 597
 598                 if (!dcs[i].ss_s) {
 599                         interpret_string_addr_prefer_ipv4(&r->ss,
 600                                                 dcs[i].hostname, 0);
 601                         i++;
 602                         j = 0;
 603                 } else {
 604                         /* use the IP addresses from the SRV sresponse */
 605
 606                         if (j >= dcs[i].num_ips) {
 607                                 i++;
 608                                 j = 0;
 609                                 continue;
 610                         }
 611
 612                         r->ss = dcs[i].ss_s[j];
 613                         j++;
 614                 }
 615
 616                 /* make sure it is a valid IP.  I considered checking the
 617                  * negative connection cache, but this is the wrong place for
 618                  * it.  Maybe only as a hac.  After think about it, if all of
 619                  * the IP addresses retuend from DNS are dead, what hope does a
 620                  * netbios name lookup have?  The standard reason for falling
 621                  * back to netbios lookups is that our DNS server doesn't know
 622                  * anything about the DC's   -- jerry */
 623
 624                 if (!is_zero_addr((struct sockaddr *)(void *)&r->ss)) {
 625                         count++;
 626                         continue;
 627                 }
 628         }
 629
 630         *returned_dclist = dclist;
 631         *return_count = count;
 632
 633         if (count > 0) {
 634                 return NT_STATUS_OK;
 635         }
 636
 637         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 638 }
 639
 640 /****************************************************************
 641 ****************************************************************/
 642
 643 static NTSTATUS make_domain_controller_info(TALLOC_CTX *mem_ctx,
 644                                             const char *dc_unc,
 645                                             const char *dc_address,
 646                                             uint32_t dc_address_type,
 647                                             const struct GUID *domain_guid,
 648                                             const char *domain_name,
 649                                             const char *forest_name,
 650                                             uint32_t flags,
 651                                             const char *dc_site_name,
 652                                             const char *client_site_name,
 653                                             struct netr_DsRGetDCNameInfo **info_out)
 654 {
 655         struct netr_DsRGetDCNameInfo *info;
 656
 657         info = TALLOC_ZERO_P(mem_ctx, struct netr_DsRGetDCNameInfo);
 658         NT_STATUS_HAVE_NO_MEMORY(info);
 659
 660         if (dc_unc) {
 661                 info->dc_unc = talloc_strdup(mem_ctx, dc_unc);
 662                 NT_STATUS_HAVE_NO_MEMORY(info->dc_unc);
 663         }
 664
 665         if (dc_address) {
 666                 if (!(dc_address[0] == '\\' && dc_address[1] == '\\')) {
 667                         info->dc_address = talloc_asprintf(mem_ctx, "\\\\%s",
 668                                                            dc_address);
 669                 } else {
 670                         info->dc_address = talloc_strdup(mem_ctx, dc_address);
 671                 }
 672                 NT_STATUS_HAVE_NO_MEMORY(info->dc_address);
 673         }
 674
 675         info->dc_address_type = dc_address_type;
 676
 677         if (domain_guid) {
 678                 info->domain_guid = *domain_guid;
 679         }
 680
 681         if (domain_name) {
 682                 info->domain_name = talloc_strdup(mem_ctx, domain_name);
 683                 NT_STATUS_HAVE_NO_MEMORY(info->domain_name);
 684         }
 685
 686         if (forest_name && *forest_name) {
 687                 info->forest_name = talloc_strdup(mem_ctx, forest_name);
 688                 NT_STATUS_HAVE_NO_MEMORY(info->forest_name);
 689                 flags |= DS_DNS_FOREST;
 690         }
 691
 692         info->dc_flags = flags;
 693
 694         if (dc_site_name) {
 695                 info->dc_site_name = talloc_strdup(mem_ctx, dc_site_name);
 696                 NT_STATUS_HAVE_NO_MEMORY(info->dc_site_name);
 697         }
 698
 699         if (client_site_name) {
 700                 info->client_site_name = talloc_strdup(mem_ctx,
 701                                                        client_site_name);
 702                 NT_STATUS_HAVE_NO_MEMORY(info->client_site_name);
 703         }
 704
 705         *info_out = info;
 706
 707         return NT_STATUS_OK;
 708 }
 709
 710 /****************************************************************
 711 ****************************************************************/
 712
 713 static void map_dc_and_domain_names(uint32_t flags,
 714                                     const char *dc_name,
 715                                     const char *domain_name,
 716                                     const char *dns_dc_name,
 717                                     const char *dns_domain_name,
 718                                     uint32_t *dc_flags,
 719                                     const char **hostname_p,
 720                                     const char **domain_p)
 721 {
 722         switch (flags & 0xf0000000) {
 723                 case DS_RETURN_FLAT_NAME:
 724                         if (dc_name && domain_name &&
 725                             *dc_name && *domain_name) {
 726                                 *hostname_p = dc_name;
 727                                 *domain_p = domain_name;
 728                                 break;
 729                         }
 730                 case DS_RETURN_DNS_NAME:
 731                 default:
 732                         if (dns_dc_name && dns_domain_name &&
 733                             *dns_dc_name && *dns_domain_name) {
 734                                 *hostname_p = dns_dc_name;
 735                                 *domain_p = dns_domain_name;
 736                                 *dc_flags |= DS_DNS_DOMAIN | DS_DNS_CONTROLLER;
 737                                 break;
 738                         }
 739                         if (dc_name && domain_name &&
 740                             *dc_name && *domain_name) {
 741                                 *hostname_p = dc_name;
 742                                 *domain_p = domain_name;
 743                                 break;
 744                         }
 745         }
 746 }
 747
 748 /****************************************************************
 749 ****************************************************************/
 750
 751 static NTSTATUS make_dc_info_from_cldap_reply(TALLOC_CTX *mem_ctx,
 752                                               uint32_t flags,
 753                                               struct sockaddr_storage *ss,
 754                                               struct NETLOGON_SAM_LOGON_RESPONSE_EX *r,
 755                                               struct netr_DsRGetDCNameInfo **info)
 756 {
 757         const char *dc_hostname = NULL;
 758         const char *dc_domain_name = NULL;
 759         const char *dc_address = NULL;
 760         const char *dc_forest = NULL;
 761         uint32_t dc_address_type = 0;
 762         uint32_t dc_flags = 0;
 763         struct GUID *dc_domain_guid = NULL;
 764         const char *dc_server_site = NULL;
 765         const char *dc_client_site = NULL;
 766
 767         char addr[INET6_ADDRSTRLEN];
 768
 769         if (ss) {
 770                 print_sockaddr(addr, sizeof(addr), ss);
 771                 dc_address = addr;
 772                 dc_address_type = DS_ADDRESS_TYPE_INET;
 773         }
 774
 775         if (!ss && r->sockaddr.pdc_ip) {
 776                 dc_address      = r->sockaddr.pdc_ip;
 777                 dc_address_type = DS_ADDRESS_TYPE_INET;
 778         } else {
 779                 dc_address      = r->pdc_name;
 780                 dc_address_type = DS_ADDRESS_TYPE_NETBIOS;
 781         }
 782
 783         map_dc_and_domain_names(flags,
 784                                 r->pdc_name,
 785                                 r->domain,
 786                                 r->pdc_dns_name,
 787                                 r->dns_domain,
 788                                 &dc_flags,
 789                                 &dc_hostname,
 790                                 &dc_domain_name);
 791
 792         dc_flags        |= r->server_type;
 793         dc_forest       = r->forest;
 794         dc_domain_guid  = &r->domain_uuid;
 795         dc_server_site  = r->server_site;
 796         dc_client_site  = r->client_site;
 797
 798         return make_domain_controller_info(mem_ctx,
 799                                            dc_hostname,
 800                                            dc_address,
 801                                            dc_address_type,
 802                                            dc_domain_guid,
 803                                            dc_domain_name,
 804                                            dc_forest,
 805                                            dc_flags,
 806                                            dc_server_site,
 807                                            dc_client_site,
 808                                            info);
 809 }
 810
 811 /****************************************************************
 812 ****************************************************************/
 813
 814 static uint32_t map_ds_flags_to_nt_version(uint32_t flags)
 815 {
 816         uint32_t nt_version = 0;
 817
 818         if (flags & DS_PDC_REQUIRED) {
 819                 nt_version |= NETLOGON_NT_VERSION_PDC;
 820         }
 821
 822         if (flags & DS_GC_SERVER_REQUIRED) {
 823                 nt_version |= NETLOGON_NT_VERSION_GC;
 824         }
 825
 826         if (flags & DS_TRY_NEXTCLOSEST_SITE) {
 827                 nt_version |= NETLOGON_NT_VERSION_WITH_CLOSEST_SITE;
 828         }
 829
 830         if (flags & DS_IP_REQUIRED) {
 831                 nt_version |= NETLOGON_NT_VERSION_IP;
 832         }
 833
 834         return nt_version;
 835 }
 836
 837 /****************************************************************
 838 ****************************************************************/
 839
 840 static NTSTATUS process_dc_dns(TALLOC_CTX *mem_ctx,
 841                                const char *domain_name,
 842                                uint32_t flags,
 843                                struct ip_service_name *dclist,
 844                                int num_dcs,
 845                                struct netr_DsRGetDCNameInfo **info)
 846 {
 847         int i = 0;
 848         bool valid_dc = false;
 849         struct netlogon_samlogon_response *r = NULL;
 850         uint32_t nt_version = NETLOGON_NT_VERSION_5 |
 851                               NETLOGON_NT_VERSION_5EX;
 852         uint32_t ret_flags = 0;
 853         NTSTATUS status;
 854
 855         nt_version |= map_ds_flags_to_nt_version(flags);
 856
 857         for (i=0; i<num_dcs; i++) {
 858
 859                 DEBUG(10,("LDAP ping to %s\n", dclist[i].hostname));
 860
 861                 if (ads_cldap_netlogon(mem_ctx, dclist[i].hostname,
 862                                         domain_name,
 863                                         nt_version,
 864                                         &r))
 865                 {
 866                         nt_version = r->ntver;
 867                         ret_flags = get_cldap_reply_server_flags(r, nt_version);
 868
 869                         if (check_cldap_reply_required_flags(ret_flags, flags)) {
 870                                 valid_dc = true;
 871                                 break;
 872                         }
 873                 }
 874
 875                 continue;
 876         }
 877
 878         if (!valid_dc) {
 879                 return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 880         }
 881
 882         status = make_dc_info_from_cldap_reply(mem_ctx, flags, &dclist[i].ss,
 883                                                &r->data.nt5_ex, info);
 884         if (NT_STATUS_IS_OK(status)) {
 885                 return store_cldap_reply(mem_ctx, flags, &dclist[i].ss,
 886                                          nt_version, &r->data.nt5_ex);
 887         }
 888
 889         return status;
 890 }
 891
 892 /****************************************************************
 893 ****************************************************************/
 894
 895 static struct event_context *ev_context(void)
 896 {
 897         static struct event_context *ctx;
 898
 899         if (!ctx && !(ctx = event_context_init(NULL))) {
 900                 smb_panic("Could not init event context");
 901         }
 902         return ctx;
 903 }
 904
 905 /****************************************************************
 906 ****************************************************************/
 907
 908 static struct messaging_context *msg_context(TALLOC_CTX *mem_ctx)
 909 {
 910         static struct messaging_context *ctx;
 911
 912         if (!ctx && !(ctx = messaging_init(mem_ctx, server_id_self(),
 913                                            ev_context()))) {
 914                 smb_panic("Could not init messaging context");
 915         }
 916         return ctx;
 917 }
 918
 919 /****************************************************************
 920 ****************************************************************/
 921
 922 static NTSTATUS process_dc_netbios(TALLOC_CTX *mem_ctx,
 923                                    struct messaging_context *msg_ctx,
 924                                    const char *domain_name,
 925                                    uint32_t flags,
 926                                    struct ip_service_name *dclist,
 927                                    int num_dcs,
 928                                    struct netr_DsRGetDCNameInfo **info)
 929 {
 930         struct sockaddr_storage ss;
 931         struct ip_service ip_list;
 932         enum nbt_name_type name_type = NBT_NAME_LOGON;
 933         NTSTATUS status;
 934         int i;
 935         const char *dc_name = NULL;
 936         fstring tmp_dc_name;
 937         struct netlogon_samlogon_response *r = NULL;
 938         bool store_cache = false;
 939         uint32_t nt_version = NETLOGON_NT_VERSION_1 |
 940                               NETLOGON_NT_VERSION_5 |
 941                               NETLOGON_NT_VERSION_5EX_WITH_IP;
 942
 943         if (!msg_ctx) {
 944                 msg_ctx = msg_context(mem_ctx);
 945         }
 946
 947         if (flags & DS_PDC_REQUIRED) {
 948                 name_type = NBT_NAME_PDC;
 949         }
 950
 951         nt_version |= map_ds_flags_to_nt_version(flags);
 952
 953         DEBUG(10,("process_dc_netbios\n"));
 954
 955         for (i=0; i<num_dcs; i++) {
 956
 957                 ip_list.ss = dclist[i].ss;
 958                 ip_list.port = 0;
 959
 960                 if (!interpret_string_addr_prefer_ipv4(&ss, dclist[i].hostname, AI_NUMERICHOST)) {
 961                         return NT_STATUS_UNSUCCESSFUL;
 962                 }
 963
 964                 if (send_getdc_request(mem_ctx, msg_ctx,
 965                                        &dclist[i].ss, domain_name,
 966                                        NULL, nt_version))
 967                 {
 968                         int k;
 969                         smb_msleep(300);
 970                         for (k=0; k<5; k++) {
 971                                 if (receive_getdc_response(mem_ctx,
 972                                                            &dclist[i].ss,
 973                                                            domain_name,
 974                                                            &nt_version,
 975                                                            &dc_name,
 976                                                            &r)) {
 977                                         store_cache = true;
 978                                         namecache_store(dc_name, NBT_NAME_SERVER, 1, &ip_list);
 979                                         goto make_reply;
 980                                 }
 981                                 smb_msleep(1500);
 982                         }
 983                 }
 984
 985                 if (name_status_find(domain_name,
 986                                      name_type,
 987                                      NBT_NAME_SERVER,
 988                                      &dclist[i].ss,
 989                                      tmp_dc_name))
 990                 {
 991                         struct NETLOGON_SAM_LOGON_RESPONSE_NT40 logon1;
 992
 993                         r = TALLOC_ZERO_P(mem_ctx, struct netlogon_samlogon_response);
 994                         NT_STATUS_HAVE_NO_MEMORY(r);
 995
 996                         ZERO_STRUCT(logon1);
 997
 998                         nt_version = NETLOGON_NT_VERSION_1;
 999
1000                         logon1.nt_version = nt_version;
1001                         logon1.server = tmp_dc_name;
1002                         logon1.domain = talloc_strdup_upper(mem_ctx, domain_name);
1003                         NT_STATUS_HAVE_NO_MEMORY(logon1.domain);
1004
1005                         r->data.nt4 = logon1;
1006                         r->ntver = nt_version;
1007
1008                         map_netlogon_samlogon_response(r);
1009
1010                         namecache_store(tmp_dc_name, NBT_NAME_SERVER, 1, &ip_list);
1011
1012                         goto make_reply;
1013                 }
1014         }
1015
1016         return NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1017
1018  make_reply:
1019
1020         status = make_dc_info_from_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1021                                                &r->data.nt5_ex, info);
1022         if (NT_STATUS_IS_OK(status) && store_cache) {
1023                 return store_cldap_reply(mem_ctx, flags, &dclist[i].ss,
1024                                          nt_version, &r->data.nt5_ex);
1025         }
1026
1027         return status;
1028 }
1029
1030 /****************************************************************
1031 ****************************************************************/
1032
1033 static NTSTATUS dsgetdcname_rediscover(TALLOC_CTX *mem_ctx,
1034                                        struct messaging_context *msg_ctx,
1035                                        const char *domain_name,
1036                                        const struct GUID *domain_guid,
1037                                        uint32_t flags,
1038                                        const char *site_name,
1039                                        struct netr_DsRGetDCNameInfo **info)
1040 {
1041         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1042         struct ip_service_name *dclist = NULL;
1043         int num_dcs;
1044
1045         DEBUG(10,("dsgetdcname_rediscover\n"));
1046
1047         if (flags & DS_IS_FLAT_NAME) {
1048
1049                 status = discover_dc_netbios(mem_ctx, domain_name, flags,
1050                                              &dclist, &num_dcs);
1051                 NT_STATUS_NOT_OK_RETURN(status);
1052
1053                 return process_dc_netbios(mem_ctx, msg_ctx, domain_name, flags,
1054                                           dclist, num_dcs, info);
1055         }
1056
1057         if (flags & DS_IS_DNS_NAME) {
1058
1059                 status = discover_dc_dns(mem_ctx, domain_name, domain_guid,
1060                                          flags, site_name, &dclist, &num_dcs);
1061                 NT_STATUS_NOT_OK_RETURN(status);
1062
1063                 return process_dc_dns(mem_ctx, domain_name, flags,
1064                                       dclist, num_dcs, info);
1065         }
1066
1067         status = discover_dc_dns(mem_ctx, domain_name, domain_guid, flags,
1068                                  site_name, &dclist, &num_dcs);
1069
1070         if (NT_STATUS_IS_OK(status) && num_dcs != 0) {
1071
1072                 status = process_dc_dns(mem_ctx, domain_name, flags, dclist,
1073                                         num_dcs, info);
1074                 if (NT_STATUS_IS_OK(status)) {
1075                         return status;
1076                 }
1077         }
1078
1079         status = discover_dc_netbios(mem_ctx, domain_name, flags, &dclist,
1080                                      &num_dcs);
1081         NT_STATUS_NOT_OK_RETURN(status);
1082
1083         return process_dc_netbios(mem_ctx, msg_ctx, domain_name, flags, dclist,
1084                                   num_dcs, info);
1085 }
1086
1087 static bool is_closest_site(struct netr_DsRGetDCNameInfo *info)
1088 {
1089         if (info->dc_flags & DS_SERVER_CLOSEST) {
1090                 return true;
1091         }
1092
1093         if (!info->client_site_name) {
1094                 return true;
1095         }
1096
1097         if (!info->dc_site_name) {
1098                 return false;
1099         }
1100
1101         if (strcmp(info->client_site_name, info->dc_site_name) == 0) {
1102                 return true;
1103         }
1104
1105         return false;
1106 }
1107
1108 /********************************************************************
1109  dsgetdcname.
1110
1111  This will be the only public function here.
1112 ********************************************************************/
1113
1114 NTSTATUS dsgetdcname(TALLOC_CTX *mem_ctx,
1115                      struct messaging_context *msg_ctx,
1116                      const char *domain_name,
1117                      const struct GUID *domain_guid,
1118                      const char *site_name,
1119                      uint32_t flags,
1120                      struct netr_DsRGetDCNameInfo **info)
1121 {
1122         NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1123         struct netr_DsRGetDCNameInfo *myinfo = NULL;
1124         char *query_site = NULL;
1125         bool first = true;
1126         struct netr_DsRGetDCNameInfo *first_info = NULL;
1127
1128         DEBUG(10,("dsgetdcname: domain_name: %s, "
1129                   "domain_guid: %s, site_name: %s, flags: 0x%08x\n",
1130                   domain_name,
1131                   domain_guid ? GUID_string(mem_ctx, domain_guid) : "(null)",
1132                   site_name, flags));
1133
1134         *info = NULL;
1135
1136         if (!check_allowed_required_flags(flags, site_name)) {
1137                 DEBUG(0,("invalid flags specified\n"));
1138                 return NT_STATUS_INVALID_PARAMETER;
1139         }
1140
1141         if (!site_name) {
1142                 query_site = sitename_fetch(domain_name);
1143         } else {
1144                 query_site = SMB_STRDUP(site_name);
1145         }
1146
1147         if (flags & DS_FORCE_REDISCOVERY) {
1148                 goto rediscover;
1149         }
1150
1151         status = dsgetdcname_cached(mem_ctx, msg_ctx, domain_name, domain_guid,
1152                                     flags, query_site, &myinfo);
1153         if (NT_STATUS_IS_OK(status)) {
1154                 goto done;
1155         }
1156
1157         if (flags & DS_BACKGROUND_ONLY) {
1158                 goto done;
1159         }
1160
1161  rediscover:
1162         status = dsgetdcname_rediscover(mem_ctx, msg_ctx, domain_name,
1163                                         domain_guid, flags, query_site,
1164                                         &myinfo);
1165
1166  done:
1167         SAFE_FREE(query_site);
1168
1169         if (!NT_STATUS_IS_OK(status)) {
1170                 if (!first) {
1171                         *info = first_info;
1172                         return NT_STATUS_OK;
1173                 }
1174                 return status;
1175         }
1176
1177         if (!first) {
1178                 TALLOC_FREE(first_info);
1179         } else if (!is_closest_site(myinfo)) {
1180                 first = false;
1181                 first_info = myinfo;
1182                 /* TODO: may use the next_closest_site here */
1183                 query_site = SMB_STRDUP(myinfo->client_site_name);
1184                 goto rediscover;
1185         }
1186
1187         *info = myinfo;
1188         return NT_STATUS_OK;
1189 }