source4/rpc_server/drsuapi/getncchanges.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    implement the DRSUpdateRefs call
   5
   6    Copyright (C) Anatoliy Atanasov 2009
   7    Copyright (C) Andrew Tridgell 2009
   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 #include "rpc_server/dcerpc_server.h"
  25 #include "dsdb/samdb/samdb.h"
  26 #include "param/param.h"
  27 #include "librpc/gen_ndr/ndr_drsblobs.h"
  28 #include "librpc/gen_ndr/ndr_drsuapi.h"
  29 #include "rpc_server/drsuapi/dcesrv_drsuapi.h"
  30 #include "rpc_server/dcerpc_server_proto.h"
  31 #include "../libcli/drsuapi/drsuapi.h"
  32 #include "libcli/security/security.h"
  33 #include "lib/util/binsearch.h"
  34
  35 /*
  36   build a DsReplicaObjectIdentifier from a ldb msg
  37  */
  38 static struct drsuapi_DsReplicaObjectIdentifier *get_object_identifier(TALLOC_CTX *mem_ctx,
  39                                                                        struct ldb_message *msg)
  40 {
  41         struct drsuapi_DsReplicaObjectIdentifier *identifier;
  42         struct dom_sid *sid;
  43
  44         identifier = talloc(mem_ctx, struct drsuapi_DsReplicaObjectIdentifier);
  45         if (identifier == NULL) {
  46                 return NULL;
  47         }
  48
  49         identifier->dn = ldb_dn_alloc_linearized(identifier, msg->dn);
  50         identifier->guid = samdb_result_guid(msg, "objectGUID");
  51
  52         sid = samdb_result_dom_sid(identifier, msg, "objectSid");
  53         if (sid) {
  54                 identifier->sid = *sid;
  55         } else {
  56                 ZERO_STRUCT(identifier->sid);
  57         }
  58         return identifier;
  59 }
  60
  61 static int udv_compare(const struct GUID *guid1, struct GUID guid2)
  62 {
  63         return GUID_compare(guid1, &guid2);
  64 }
  65
  66 /*
  67   see if we can filter an attribute using the uptodateness_vector
  68  */
  69 static bool udv_filter(const struct drsuapi_DsReplicaCursorCtrEx *udv,
  70                        const struct GUID *originating_invocation_id,
  71                        uint64_t originating_usn)
  72 {
  73         const struct drsuapi_DsReplicaCursor *c;
  74         if (udv == NULL) return false;
  75         BINARY_ARRAY_SEARCH(udv->cursors, udv->count, source_dsa_invocation_id,
  76                             originating_invocation_id, udv_compare, c);
  77         if (c && originating_usn <= c->highest_usn) {
  78                 return true;
  79         }
  80         return false;
  81
  82 }
  83
  84 /*
  85   drsuapi_DsGetNCChanges for one object
  86 */
  87 static WERROR get_nc_changes_build_object(struct drsuapi_DsReplicaObjectListItemEx *obj,
  88                                           struct ldb_message *msg,
  89                                           struct ldb_context *sam_ctx,
  90                                           struct ldb_dn *ncRoot_dn,
  91                                           struct dsdb_schema *schema,
  92                                           DATA_BLOB *session_key,
  93                                           uint64_t highest_usn,
  94                                           uint32_t replica_flags,
  95                                           struct drsuapi_DsReplicaCursorCtrEx *uptodateness_vector)
  96 {
  97         const struct ldb_val *md_value;
  98         int i, n;
  99         struct replPropertyMetaDataBlob md;
 100         uint32_t rid = 0;
 101         enum ndr_err_code ndr_err;
 102         uint32_t *attids;
 103         const char *rdn;
 104         const struct dsdb_attribute *rdn_sa;
 105         unsigned int instanceType;
 106
 107         instanceType = ldb_msg_find_attr_as_uint(msg, "instanceType", 0);
 108         if (instanceType & INSTANCE_TYPE_IS_NC_HEAD) {
 109                 obj->is_nc_prefix = true;
 110                 obj->parent_object_guid = NULL;
 111         } else {
 112                 obj->is_nc_prefix = false;
 113                 obj->parent_object_guid = talloc(obj, struct GUID);
 114                 if (obj->parent_object_guid == NULL) {
 115                         return WERR_DS_DRA_INTERNAL_ERROR;
 116                 }
 117                 *obj->parent_object_guid = samdb_result_guid(msg, "parentGUID");
 118                 if (GUID_all_zero(obj->parent_object_guid)) {
 119                         DEBUG(0,(__location__ ": missing parentGUID for %s\n",
 120                                  ldb_dn_get_linearized(msg->dn)));
 121                         return WERR_DS_DRA_INTERNAL_ERROR;
 122                 }
 123         }
 124         obj->next_object = NULL;
 125
 126         md_value = ldb_msg_find_ldb_val(msg, "replPropertyMetaData");
 127         if (!md_value) {
 128                 /* nothing to send */
 129                 return WERR_OK;
 130         }
 131
 132         ndr_err = ndr_pull_struct_blob(md_value, obj,
 133                                        lp_iconv_convenience(ldb_get_opaque(sam_ctx, "loadparm")), &md,
 134                                        (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
 135         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 136                 return WERR_DS_DRA_INTERNAL_ERROR;
 137         }
 138
 139         if (md.version != 1) {
 140                 return WERR_DS_DRA_INTERNAL_ERROR;
 141         }
 142
 143         rdn = ldb_dn_get_rdn_name(msg->dn);
 144         if (rdn == NULL) {
 145                 DEBUG(0,(__location__ ": No rDN for %s\n", ldb_dn_get_linearized(msg->dn)));
 146                 return WERR_DS_DRA_INTERNAL_ERROR;
 147         }
 148
 149         rdn_sa = dsdb_attribute_by_lDAPDisplayName(schema, rdn);
 150         if (rdn_sa == NULL) {
 151                 DEBUG(0,(__location__ ": Can't find dsds_attribute for rDN %s in %s\n",
 152                          rdn, ldb_dn_get_linearized(msg->dn)));
 153                 return WERR_DS_DRA_INTERNAL_ERROR;
 154         }
 155
 156         obj->meta_data_ctr = talloc(obj, struct drsuapi_DsReplicaMetaDataCtr);
 157         attids = talloc_array(obj, uint32_t, md.ctr.ctr1.count);
 158
 159         obj->object.identifier = get_object_identifier(obj, msg);
 160         if (obj->object.identifier == NULL) {
 161                 return WERR_NOMEM;
 162         }
 163         dom_sid_split_rid(NULL, &obj->object.identifier->sid, NULL, &rid);
 164
 165         obj->meta_data_ctr->meta_data = talloc_array(obj, struct drsuapi_DsReplicaMetaData, md.ctr.ctr1.count);
 166         for (n=i=0; i<md.ctr.ctr1.count; i++) {
 167                 const struct dsdb_attribute *sa;
 168                 /* if the attribute has not changed, and it is not the
 169                    instanceType then don't include it */
 170                 if (md.ctr.ctr1.array[i].local_usn < highest_usn &&
 171                     md.ctr.ctr1.array[i].attid != DRSUAPI_ATTRIBUTE_instanceType) continue;
 172
 173                 /* don't include the rDN */
 174                 if (md.ctr.ctr1.array[i].attid == rdn_sa->attributeID_id) continue;
 175
 176                 sa = dsdb_attribute_by_attributeID_id(schema, md.ctr.ctr1.array[i].attid);
 177                 if (sa->linkID) {
 178                         struct ldb_message_element *el;
 179                         el = ldb_msg_find_element(msg, sa->lDAPDisplayName);
 180                         if (el && el->num_values && dsdb_dn_is_upgraded_link_val(&el->values[0])) {
 181                                 /* don't send upgraded links inline */
 182                                 continue;
 183                         }
 184                 }
 185
 186                 /* filter by uptodateness_vector */
 187                 if (md.ctr.ctr1.array[i].attid != DRSUAPI_ATTRIBUTE_instanceType &&
 188                     udv_filter(uptodateness_vector,
 189                                &md.ctr.ctr1.array[i].originating_invocation_id,
 190                                md.ctr.ctr1.array[i].originating_usn)) {
 191                         continue;
 192                 }
 193
 194                 obj->meta_data_ctr->meta_data[n].originating_change_time = md.ctr.ctr1.array[i].originating_change_time;
 195                 obj->meta_data_ctr->meta_data[n].version = md.ctr.ctr1.array[i].version;
 196                 obj->meta_data_ctr->meta_data[n].originating_invocation_id = md.ctr.ctr1.array[i].originating_invocation_id;
 197                 obj->meta_data_ctr->meta_data[n].originating_usn = md.ctr.ctr1.array[i].originating_usn;
 198                 attids[n] = md.ctr.ctr1.array[i].attid;
 199                 n++;
 200         }
 201
 202         /* ignore it if its an empty change. Note that renames always
 203          * change the 'name' attribute, so they won't be ignored by
 204          * this */
 205         if (n == 0 ||
 206             (n == 1 && attids[0] == DRSUAPI_ATTRIBUTE_instanceType)) {
 207                 talloc_free(obj->meta_data_ctr);
 208                 obj->meta_data_ctr = NULL;
 209                 return WERR_OK;
 210         }
 211
 212         obj->meta_data_ctr->count = n;
 213
 214         obj->object.flags = DRSUAPI_DS_REPLICA_OBJECT_FROM_MASTER;
 215         obj->object.attribute_ctr.num_attributes = obj->meta_data_ctr->count;
 216         obj->object.attribute_ctr.attributes = talloc_array(obj, struct drsuapi_DsReplicaAttribute,
 217                                                             obj->object.attribute_ctr.num_attributes);
 218
 219         /*
 220          * Note that the meta_data array and the attributes array must
 221          * be the same size and in the same order
 222          */
 223         for (i=0; i<obj->object.attribute_ctr.num_attributes; i++) {
 224                 struct ldb_message_element *el;
 225                 WERROR werr;
 226                 const struct dsdb_attribute *sa;
 227
 228                 sa = dsdb_attribute_by_attributeID_id(schema, attids[i]);
 229                 if (!sa) {
 230                         DEBUG(0,("Unable to find attributeID %u in schema\n", attids[i]));
 231                         return WERR_DS_DRA_INTERNAL_ERROR;
 232                 }
 233
 234                 el = ldb_msg_find_element(msg, sa->lDAPDisplayName);
 235                 if (el == NULL) {
 236                         /* this happens for attributes that have been removed */
 237                         DEBUG(5,("No element '%s' for attributeID %u in message\n",
 238                                  sa->lDAPDisplayName, attids[i]));
 239                         ZERO_STRUCT(obj->object.attribute_ctr.attributes[i]);
 240                         obj->object.attribute_ctr.attributes[i].attid = attids[i];
 241                 } else {
 242                         werr = dsdb_attribute_ldb_to_drsuapi(sam_ctx, schema, el, obj,
 243                                                              &obj->object.attribute_ctr.attributes[i]);
 244                         if (!W_ERROR_IS_OK(werr)) {
 245                                 DEBUG(0,("Unable to convert %s to DRS object - %s\n",
 246                                          sa->lDAPDisplayName, win_errstr(werr)));
 247                                 return werr;
 248                         }
 249                         /* if DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING is set
 250                          * check if attribute is secret and send a null value
 251                          */
 252                         if (replica_flags & DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING) {
 253                                 drsuapi_process_secret_attribute(&obj->object.attribute_ctr.attributes[i],
 254                                                                  &obj->meta_data_ctr->meta_data[i]);
 255                         }
 256                         /* some attributes needs to be encrypted
 257                            before being sent */
 258                         werr = drsuapi_encrypt_attribute(obj, session_key, rid,
 259                                                          &obj->object.attribute_ctr.attributes[i]);
 260                         if (!W_ERROR_IS_OK(werr)) {
 261                                 DEBUG(0,("Unable to encrypt %s in DRS object - %s\n",
 262                                          sa->lDAPDisplayName, win_errstr(werr)));
 263                                 return werr;
 264                         }
 265                 }
 266         }
 267
 268         return WERR_OK;
 269 }
 270
 271
 272 /*
 273   add one linked attribute from an object to the list of linked
 274   attributes in a getncchanges request
 275  */
 276 static WERROR get_nc_changes_add_la(TALLOC_CTX *mem_ctx,
 277                                     struct ldb_context *sam_ctx,
 278                                     const struct dsdb_schema *schema,
 279                                     const struct dsdb_attribute *sa,
 280                                     struct ldb_message *msg,
 281                                     struct dsdb_dn *dsdb_dn,
 282                                     struct drsuapi_DsReplicaLinkedAttribute **la_list,
 283                                     uint32_t *la_count)
 284 {
 285         struct drsuapi_DsReplicaLinkedAttribute *la;
 286         bool active;
 287         NTSTATUS status;
 288         WERROR werr;
 289
 290         (*la_list) = talloc_realloc(mem_ctx, *la_list, struct drsuapi_DsReplicaLinkedAttribute, (*la_count)+1);
 291         W_ERROR_HAVE_NO_MEMORY(*la_list);
 292
 293         la = &(*la_list)[*la_count];
 294
 295         la->identifier = get_object_identifier(*la_list, msg);
 296         W_ERROR_HAVE_NO_MEMORY(la->identifier);
 297
 298         active = (dsdb_dn_rmd_flags(dsdb_dn->dn) & DSDB_RMD_FLAG_DELETED) == 0;
 299
 300         la->attid = sa->attributeID_id;
 301         la->flags = active?DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE:0;
 302
 303         status = dsdb_get_extended_dn_nttime(dsdb_dn->dn, &la->originating_add_time, "RMD_ADDTIME");
 304         if (!NT_STATUS_IS_OK(status)) {
 305                 return ntstatus_to_werror(status);
 306         }
 307         status = dsdb_get_extended_dn_uint32(dsdb_dn->dn, &la->meta_data.version, "RMD_VERSION");
 308         if (!NT_STATUS_IS_OK(status)) {
 309                 return ntstatus_to_werror(status);
 310         }
 311         status = dsdb_get_extended_dn_nttime(dsdb_dn->dn, &la->meta_data.originating_change_time, "RMD_CHANGETIME");
 312         if (!NT_STATUS_IS_OK(status)) {
 313                 return ntstatus_to_werror(status);
 314         }
 315         status = dsdb_get_extended_dn_guid(dsdb_dn->dn, &la->meta_data.originating_invocation_id, "RMD_INVOCID");
 316         if (!NT_STATUS_IS_OK(status)) {
 317                 return ntstatus_to_werror(status);
 318         }
 319         status = dsdb_get_extended_dn_uint64(dsdb_dn->dn, &la->meta_data.originating_usn, "RMD_ORIGINATING_USN");
 320         if (!NT_STATUS_IS_OK(status)) {
 321                 return ntstatus_to_werror(status);
 322         }
 323
 324         werr = dsdb_dn_la_to_blob(sam_ctx, sa, schema, *la_list, dsdb_dn, &la->value.blob);
 325         W_ERROR_NOT_OK_RETURN(werr);
 326
 327         (*la_count)++;
 328         return WERR_OK;
 329 }
 330
 331
 332 /*
 333   add linked attributes from an object to the list of linked
 334   attributes in a getncchanges request
 335  */
 336 static WERROR get_nc_changes_add_links(struct ldb_context *sam_ctx,
 337                                        TALLOC_CTX *mem_ctx,
 338                                        struct ldb_dn *ncRoot_dn,
 339                                        struct dsdb_schema *schema,
 340                                        uint64_t highest_usn,
 341                                        uint32_t replica_flags,
 342                                        struct ldb_message *msg,
 343                                        struct drsuapi_DsReplicaLinkedAttribute **la_list,
 344                                        uint32_t *la_count,
 345                                        struct drsuapi_DsReplicaCursorCtrEx *uptodateness_vector)
 346 {
 347         int i;
 348         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 349         uint64_t uSNChanged = ldb_msg_find_attr_as_int(msg, "uSNChanged", -1);
 350
 351         for (i=0; i<msg->num_elements; i++) {
 352                 struct ldb_message_element *el = &msg->elements[i];
 353                 const struct dsdb_attribute *sa;
 354                 int j;
 355
 356                 sa = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
 357
 358                 if (!sa || sa->linkID == 0 || (sa->linkID & 1)) {
 359                         /* we only want forward links */
 360                         continue;
 361                 }
 362
 363                 if (el->num_values && !dsdb_dn_is_upgraded_link_val(&el->values[0])) {
 364                         /* its an old style link, it will have been
 365                          * sent in the main replication data */
 366                         continue;
 367                 }
 368
 369                 for (j=0; j<el->num_values; j++) {
 370                         struct dsdb_dn *dsdb_dn;
 371                         uint64_t local_usn;
 372                         NTSTATUS status;
 373                         WERROR werr;
 374
 375                         dsdb_dn = dsdb_dn_parse(tmp_ctx, sam_ctx, &el->values[j], sa->syntax->ldap_oid);
 376                         if (dsdb_dn == NULL) {
 377                                 DEBUG(1,(__location__ ": Failed to parse DN for %s in %s\n",
 378                                          el->name, ldb_dn_get_linearized(msg->dn)));
 379                                 talloc_free(tmp_ctx);
 380                                 return WERR_DS_DRA_INTERNAL_ERROR;
 381                         }
 382
 383                         status = dsdb_get_extended_dn_uint64(dsdb_dn->dn, &local_usn, "RMD_LOCAL_USN");
 384                         if (!NT_STATUS_IS_OK(status)) {
 385                                 /* this can happen for attributes
 386                                    given to us with old style meta
 387                                    data */
 388                                 continue;
 389                         }
 390
 391                         if (local_usn > uSNChanged) {
 392                                 DEBUG(1,(__location__ ": uSNChanged less than RMD_LOCAL_USN for %s on %s\n",
 393                                          el->name, ldb_dn_get_linearized(msg->dn)));
 394                                 talloc_free(tmp_ctx);
 395                                 return WERR_DS_DRA_INTERNAL_ERROR;
 396                         }
 397
 398                         if (local_usn < highest_usn) {
 399                                 continue;
 400                         }
 401
 402                         werr = get_nc_changes_add_la(mem_ctx, sam_ctx, schema, sa, msg,
 403                                                      dsdb_dn, la_list, la_count);
 404                         if (!W_ERROR_IS_OK(werr)) {
 405                                 talloc_free(tmp_ctx);
 406                                 return werr;
 407                         }
 408                 }
 409         }
 410
 411         talloc_free(tmp_ctx);
 412         return WERR_OK;
 413 }
 414
 415 /*
 416   fill in the cursors return based on the replUpToDateVector for the ncRoot_dn
 417  */
 418 static WERROR get_nc_changes_udv(struct ldb_context *sam_ctx,
 419                                  struct ldb_dn *ncRoot_dn,
 420                                  struct drsuapi_DsReplicaCursor2CtrEx *udv,
 421                                  uint64_t highestUSN)
 422 {
 423         struct drsuapi_DsReplicaCursor2 *tmp_cursor;
 424         NTTIME now;
 425         time_t t = time(NULL);
 426         int i, ret;
 427
 428         udv->version = 2;
 429         udv->reserved1 = 0;
 430         udv->reserved2 = 0;
 431
 432         ret = dsdb_load_udv_v2(sam_ctx, ncRoot_dn, udv, &udv->cursors, &udv->count);
 433         if (ret != LDB_SUCCESS) {
 434                 DEBUG(0,(__location__ ": Failed to load UDV for %s - %s\n",
 435                          ldb_dn_get_linearized(ncRoot_dn), ldb_errstring(sam_ctx)));
 436                 return WERR_DS_DRA_INTERNAL_ERROR;
 437         }
 438
 439         tmp_cursor = talloc(udv, struct drsuapi_DsReplicaCursor2);
 440         tmp_cursor->source_dsa_invocation_id = *(samdb_ntds_invocation_id(sam_ctx));
 441         tmp_cursor->highest_usn = highestUSN;
 442         unix_to_nt_time(&now, t);
 443         tmp_cursor->last_sync_success = now;
 444
 445         for (i=0; i<udv->count; i++) {
 446                 if (GUID_equal(&tmp_cursor->source_dsa_invocation_id,
 447                                &udv->cursors[i].source_dsa_invocation_id)) {
 448                         udv->cursors[i] = *tmp_cursor;
 449                         break;
 450                 }
 451         }
 452         if (i == udv->count) {
 453                 udv->cursors = talloc_realloc(udv, udv->cursors, struct drsuapi_DsReplicaCursor2, udv->count+1);
 454                 if (!udv->cursors) {
 455                         return WERR_DS_DRA_INTERNAL_ERROR;
 456                 }
 457                 udv->cursors[udv->count] = *tmp_cursor;
 458                 udv->count++;
 459         }
 460
 461         qsort(udv->cursors, udv->count,
 462               sizeof(struct drsuapi_DsReplicaCursor2),
 463               (comparison_fn_t)drsuapi_DsReplicaCursor2_compare);
 464
 465         return WERR_OK;
 466 }
 467
 468
 469 /* comparison function for linked attributes - see CompareLinks() in
 470  * MS-DRSR section 4.1.10.5.17 */
 471 static int linked_attribute_compare(const struct drsuapi_DsReplicaLinkedAttribute *la1,
 472                                     const struct drsuapi_DsReplicaLinkedAttribute *la2,
 473                                     struct ldb_context *sam_ctx)
 474 {
 475         int c;
 476         WERROR werr;
 477         TALLOC_CTX *tmp_ctx;
 478         const struct dsdb_schema *schema;
 479         const struct dsdb_attribute *schema_attrib;
 480         struct dsdb_dn *dn1, *dn2;
 481         struct GUID guid1, guid2;
 482         NTSTATUS status;
 483
 484         c = GUID_compare(&la1->identifier->guid,
 485                          &la2->identifier->guid);
 486         if (c != 0) return c;
 487
 488         if (la1->attid != la2->attid) {
 489                 return la1->attid < la2->attid? -1:1;
 490         }
 491
 492         if ((la1->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE) !=
 493             (la2->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)) {
 494                 return (la1->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)? 1:-1;
 495         }
 496
 497         /* we need to get the target GUIDs to compare */
 498         tmp_ctx = talloc_new(sam_ctx);
 499
 500         schema = dsdb_get_schema(sam_ctx);
 501         schema_attrib = dsdb_attribute_by_attributeID_id(schema, la1->attid);
 502
 503         werr = dsdb_dn_la_from_blob(sam_ctx, schema_attrib, schema, tmp_ctx, la1->value.blob, &dn1);
 504         if (!W_ERROR_IS_OK(werr)) {
 505                 DEBUG(0,(__location__ ": Bad la1 blob in sort\n"));
 506                 talloc_free(tmp_ctx);
 507                 return 0;
 508         }
 509
 510         werr = dsdb_dn_la_from_blob(sam_ctx, schema_attrib, schema, tmp_ctx, la2->value.blob, &dn2);
 511         if (!W_ERROR_IS_OK(werr)) {
 512                 DEBUG(0,(__location__ ": Bad la2 blob in sort\n"));
 513                 talloc_free(tmp_ctx);
 514                 return 0;
 515         }
 516
 517         status = dsdb_get_extended_dn_guid(dn1->dn, &guid1, "GUID");
 518         if (!NT_STATUS_IS_OK(status)) {
 519                 DEBUG(0,(__location__ ": Bad la1 guid in sort\n"));
 520                 talloc_free(tmp_ctx);
 521                 return 0;
 522         }
 523         status = dsdb_get_extended_dn_guid(dn2->dn, &guid2, "GUID");
 524         if (!NT_STATUS_IS_OK(status)) {
 525                 DEBUG(0,(__location__ ": Bad la2 guid in sort\n"));
 526                 talloc_free(tmp_ctx);
 527                 return 0;
 528         }
 529
 530         talloc_free(tmp_ctx);
 531
 532         return GUID_compare(&guid1, &guid2);
 533 }
 534
 535
 536 /*
 537   sort the objects we send by tree order
 538  */
 539 static int site_res_cmp_parent_order(const struct ldb_message **m1, const struct ldb_message **m2)
 540 {
 541         return ldb_dn_compare((*m2)->dn, (*m1)->dn);
 542 }
 543
 544 /*
 545   sort the objects we send first by uSNChanged
 546  */
 547 static int site_res_cmp_usn_order(const struct ldb_message **m1, const struct ldb_message **m2)
 548 {
 549         unsigned usnchanged1, usnchanged2;
 550         unsigned cn1, cn2;
 551         cn1 = ldb_dn_get_comp_num((*m1)->dn);
 552         cn2 = ldb_dn_get_comp_num((*m2)->dn);
 553         if (cn1 != cn2) {
 554                 return cn1 > cn2 ? 1 : -1;
 555         }
 556         usnchanged1 = ldb_msg_find_attr_as_uint(*m1, "uSNChanged", 0);
 557         usnchanged2 = ldb_msg_find_attr_as_uint(*m2, "uSNChanged", 0);
 558         if (usnchanged1 == usnchanged2) {
 559                 return 0;
 560         }
 561         return usnchanged1 > usnchanged2 ? 1 : -1;
 562 }
 563
 564
 565 /*
 566   handle a DRSUAPI_EXOP_FSMO_RID_ALLOC call
 567  */
 568 static WERROR getncchanges_rid_alloc(struct drsuapi_bind_state *b_state,
 569                                      TALLOC_CTX *mem_ctx,
 570                                      struct drsuapi_DsGetNCChangesRequest8 *req8,
 571                                      struct drsuapi_DsGetNCChangesCtr6 *ctr6)
 572 {
 573         struct ldb_dn *rid_manager_dn, *fsmo_role_dn, *req_dn;
 574         int ret;
 575         struct ldb_context *ldb = b_state->sam_ctx;
 576         struct ldb_result *ext_res;
 577         struct ldb_dn *base_dn;
 578         struct dsdb_fsmo_extended_op *exop;
 579
 580         /*
 581           steps:
 582             - verify that the DN being asked for is the RID Manager DN
 583             - verify that we are the RID Manager
 584          */
 585
 586         /* work out who is the RID Manager */
 587         ret = samdb_rid_manager_dn(ldb, mem_ctx, &rid_manager_dn);
 588         if (ret != LDB_SUCCESS) {
 589                 DEBUG(0, (__location__ ": Failed to find RID Manager object - %s\n", ldb_errstring(ldb)));
 590                 return WERR_DS_DRA_INTERNAL_ERROR;
 591         }
 592
 593         req_dn = ldb_dn_new(mem_ctx, ldb, req8->naming_context->dn);
 594         if (!req_dn ||
 595             !ldb_dn_validate(req_dn) ||
 596             ldb_dn_compare(req_dn, rid_manager_dn) != 0) {
 597                 /* that isn't the RID Manager DN */
 598                 DEBUG(0,(__location__ ": RID Alloc request for wrong DN %s\n",
 599                          req8->naming_context->dn));
 600                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_MISMATCH;
 601                 return WERR_OK;
 602         }
 603
 604         /* find the DN of the RID Manager */
 605         ret = samdb_reference_dn(ldb, mem_ctx, rid_manager_dn, "fSMORoleOwner", &fsmo_role_dn);
 606         if (ret != LDB_SUCCESS) {
 607                 DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in RID Manager object - %s\n",
 608                          ldb_errstring(ldb)));
 609                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
 610                 return WERR_DS_DRA_INTERNAL_ERROR;
 611         }
 612
 613         if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), fsmo_role_dn) != 0) {
 614                 /* we're not the RID Manager - go away */
 615                 DEBUG(0,(__location__ ": RID Alloc request when not RID Manager\n"));
 616                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
 617                 return WERR_OK;
 618         }
 619
 620         exop = talloc(mem_ctx, struct dsdb_fsmo_extended_op);
 621         W_ERROR_HAVE_NO_MEMORY(exop);
 622
 623         exop->fsmo_info = req8->fsmo_info;
 624         exop->destination_dsa_guid = req8->destination_dsa_guid;
 625
 626         ret = ldb_transaction_start(ldb);
 627         if (ret != LDB_SUCCESS) {
 628                 DEBUG(0,(__location__ ": Failed transaction start - %s\n",
 629                          ldb_errstring(ldb)));
 630                 return WERR_DS_DRA_INTERNAL_ERROR;
 631         }
 632
 633         ret = ldb_extended(ldb, DSDB_EXTENDED_ALLOCATE_RID_POOL, exop, &ext_res);
 634         if (ret != LDB_SUCCESS) {
 635                 DEBUG(0,(__location__ ": Failed extended allocation RID pool operation - %s\n",
 636                          ldb_errstring(ldb)));
 637                 ldb_transaction_cancel(ldb);
 638                 return WERR_DS_DRA_INTERNAL_ERROR;
 639         }
 640
 641         ret = ldb_transaction_commit(ldb);
 642         if (ret != LDB_SUCCESS) {
 643                 DEBUG(0,(__location__ ": Failed transaction commit - %s\n",
 644                          ldb_errstring(ldb)));
 645                 return WERR_DS_DRA_INTERNAL_ERROR;
 646         }
 647
 648         talloc_free(ext_res);
 649
 650         base_dn = samdb_base_dn(ldb);
 651
 652         DEBUG(2,("Allocated RID pool for server %s\n",
 653                  GUID_string(mem_ctx, &req8->destination_dsa_guid)));
 654
 655         ctr6->extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
 656
 657         return WERR_OK;
 658 }
 659
 660
 661
 662 /* state of a partially completed getncchanges call */
 663 struct drsuapi_getncchanges_state {
 664         struct ldb_result *site_res;
 665         uint32_t num_sent;
 666         struct ldb_dn *ncRoot_dn;
 667         uint64_t min_usn;
 668         uint64_t highest_usn;
 669         struct ldb_dn *last_dn;
 670         struct drsuapi_DsReplicaLinkedAttribute *la_list;
 671         uint32_t la_count;
 672         struct drsuapi_DsReplicaCursorCtrEx *uptodateness_vector;
 673 };
 674
 675 /*
 676   drsuapi_DsGetNCChanges
 677
 678   see MS-DRSR 4.1.10.5.2 for basic logic of this function
 679 */
 680 WERROR dcesrv_drsuapi_DsGetNCChanges(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 681                                      struct drsuapi_DsGetNCChanges *r)
 682 {
 683         struct drsuapi_DsReplicaObjectIdentifier *ncRoot;
 684         int ret;
 685         int i;
 686         struct dsdb_schema *schema;
 687         struct drsuapi_DsReplicaOIDMapping_Ctr *ctr;
 688         struct drsuapi_DsReplicaObjectListItemEx **currentObject;
 689         NTSTATUS status;
 690         DATA_BLOB session_key;
 691         const char *attrs[] = { "*", "distinguishedName",
 692                                 "nTSecurityDescriptor",
 693                                 "parentGUID",
 694                                 "replPropertyMetaData",
 695                                 "unicodePwd",
 696                                 "dBCSPwd",
 697                                 "ntPwdHistory",
 698                                 "lmPwdHistory",
 699                                 "supplementalCredentials",
 700                                 NULL };
 701         WERROR werr;
 702         struct dcesrv_handle *h;
 703         struct drsuapi_bind_state *b_state;
 704         struct drsuapi_getncchanges_state *getnc_state;
 705         struct drsuapi_DsGetNCChangesRequest8 *req8;
 706         uint32_t options;
 707         uint32_t max_objects;
 708         struct ldb_dn *search_dn = NULL;
 709
 710         DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
 711         b_state = h->data;
 712
 713         *r->out.level_out = 6;
 714         /* TODO: linked attributes*/
 715         r->out.ctr->ctr6.linked_attributes_count = 0;
 716         r->out.ctr->ctr6.linked_attributes = NULL;
 717
 718         r->out.ctr->ctr6.object_count = 0;
 719         r->out.ctr->ctr6.nc_object_count = 0;
 720         r->out.ctr->ctr6.more_data = false;
 721         r->out.ctr->ctr6.uptodateness_vector = NULL;
 722
 723         /* a RODC doesn't allow for any replication */
 724         if (samdb_rodc(ldb_get_opaque(b_state->sam_ctx, "loadparm"))) {
 725                 DEBUG(0,(__location__ ": DsGetNCChanges attempt on RODC\n"));
 726                 return WERR_DS_DRA_SOURCE_DISABLED;
 727         }
 728
 729         /* Check request revision.
 730            TODO: Adding mappings to req8 from the other levels
 731          */
 732         if (r->in.level != 8) {
 733                 DEBUG(0,(__location__ ": Request for DsGetNCChanges with unsupported level %u\n",
 734                          r->in.level));
 735                 return WERR_REVISION_MISMATCH;
 736         }
 737
 738         req8 = &r->in.req->req8;
 739
 740         /* Perform access checks. */
 741         /* TODO: we need to support a sync on a specific non-root
 742          * DN. We'll need to find the real partition root here */
 743         ncRoot = req8->naming_context;
 744         if (ncRoot == NULL) {
 745                 DEBUG(0,(__location__ ": Request for DsGetNCChanges with no NC\n"));
 746                 return WERR_DS_DRA_INVALID_PARAMETER;
 747         }
 748
 749         if (samdb_ntds_options(b_state->sam_ctx, &options) != LDB_SUCCESS) {
 750                 return WERR_DS_DRA_INTERNAL_ERROR;
 751         }
 752
 753         if ((options & DS_NTDSDSA_OPT_DISABLE_OUTBOUND_REPL) &&
 754             !(req8->replica_flags & DRSUAPI_DRS_SYNC_FORCED)) {
 755                 return WERR_DS_DRA_SOURCE_DISABLED;
 756         }
 757
 758
 759         if (req8->replica_flags & DRSUAPI_DS_REPLICA_NEIGHBOUR_FULL_SYNC_PACKET) {
 760                 /* Ignore the _in_ uptpdateness vector*/
 761                 req8->uptodateness_vector = NULL;
 762         }
 763
 764         werr = drs_security_level_check(dce_call, "DsGetNCChanges");
 765         if (!W_ERROR_IS_OK(werr)) {
 766                 return werr;
 767         }
 768
 769         /* we don't yet support extended operations */
 770         switch (req8->extended_op) {
 771         case DRSUAPI_EXOP_NONE:
 772                 break;
 773
 774         case DRSUAPI_EXOP_FSMO_RID_ALLOC:
 775                 werr = getncchanges_rid_alloc(b_state, mem_ctx, req8, &r->out.ctr->ctr6);
 776                 W_ERROR_NOT_OK_RETURN(werr);
 777                 search_dn = samdb_base_dn(b_state->sam_ctx);
 778                 break;
 779
 780         case DRSUAPI_EXOP_FSMO_REQ_ROLE:
 781         case DRSUAPI_EXOP_FSMO_RID_REQ_ROLE:
 782         case DRSUAPI_EXOP_FSMO_REQ_PDC:
 783         case DRSUAPI_EXOP_FSMO_ABANDON_ROLE:
 784         case DRSUAPI_EXOP_REPL_OBJ:
 785         case DRSUAPI_EXOP_REPL_SECRET:
 786                 DEBUG(0,(__location__ ": Request for DsGetNCChanges unsupported extended op 0x%x\n",
 787                          (unsigned)req8->extended_op));
 788                 return WERR_DS_DRA_NOT_SUPPORTED;
 789         }
 790
 791         getnc_state = b_state->getncchanges_state;
 792
 793         /* see if a previous replication has been abandoned */
 794         if (getnc_state) {
 795                 struct ldb_dn *new_dn = ldb_dn_new(getnc_state, b_state->sam_ctx, ncRoot->dn);
 796                 if (ldb_dn_compare(new_dn, getnc_state->ncRoot_dn) != 0) {
 797                         DEBUG(0,(__location__ ": DsGetNCChanges 2nd replication on different DN %s %s (last_dn %s)\n",
 798                                  ldb_dn_get_linearized(new_dn),
 799                                  ldb_dn_get_linearized(getnc_state->ncRoot_dn),
 800                                  ldb_dn_get_linearized(getnc_state->last_dn)));
 801                         talloc_free(getnc_state);
 802                         getnc_state = NULL;
 803                 }
 804         }
 805
 806         if (getnc_state == NULL) {
 807                 getnc_state = talloc_zero(b_state, struct drsuapi_getncchanges_state);
 808                 if (getnc_state == NULL) {
 809                         return WERR_NOMEM;
 810                 }
 811                 b_state->getncchanges_state = getnc_state;
 812                 getnc_state->ncRoot_dn = ldb_dn_new(getnc_state, b_state->sam_ctx, ncRoot->dn);
 813         }
 814
 815         if (!ldb_dn_validate(getnc_state->ncRoot_dn) ||
 816             ldb_dn_is_null(getnc_state->ncRoot_dn)) {
 817                 DEBUG(0,(__location__ ": Bad DN '%s'\n", ncRoot->dn));
 818                 return WERR_DS_DRA_INVALID_PARAMETER;
 819         }
 820
 821         /* we need the session key for encrypting password attributes */
 822         status = dcesrv_inherited_session_key(dce_call->conn, &session_key);
 823         if (!NT_STATUS_IS_OK(status)) {
 824                 DEBUG(0,(__location__ ": Failed to get session key\n"));
 825                 return WERR_DS_DRA_INTERNAL_ERROR;
 826         }
 827
 828         /*
 829            TODO: MS-DRSR section 4.1.10.1.1
 830            Work out if this is the start of a new cycle */
 831
 832         if (getnc_state->site_res == NULL) {
 833                 char* search_filter;
 834                 enum ldb_scope scope = LDB_SCOPE_SUBTREE;
 835                 const char *extra_filter;
 836
 837                 extra_filter = lp_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "object filter");
 838
 839                 getnc_state->min_usn = req8->highwatermark.highest_usn;
 840
 841                 /* Construct response. */
 842                 search_filter = talloc_asprintf(mem_ctx,
 843                                                 "(uSNChanged>=%llu)",
 844                                                 (unsigned long long)(getnc_state->min_usn+1));
 845
 846                 if (extra_filter) {
 847                         search_filter = talloc_asprintf(mem_ctx, "(&%s(%s))", search_filter, extra_filter);
 848                 }
 849
 850                 if (req8->replica_flags & DRSUAPI_DS_REPLICA_NEIGHBOUR_CRITICAL_ONLY) {
 851                         search_filter = talloc_asprintf(mem_ctx,
 852                                                         "(&%s(isCriticalSystemObject=TRUE))",
 853                                                         search_filter);
 854                 }
 855
 856                 if (req8->replica_flags & DRSUAPI_DS_REPLICA_NEIGHBOUR_ASYNC_REP) {
 857                         scope = LDB_SCOPE_BASE;
 858                 }
 859
 860                 if (!search_dn) {
 861                         search_dn = getnc_state->ncRoot_dn;
 862                 }
 863
 864                 DEBUG(1,(__location__ ": getncchanges on %s using filter %s\n",
 865                          ldb_dn_get_linearized(getnc_state->ncRoot_dn), search_filter));
 866                 ret = drsuapi_search_with_extended_dn(b_state->sam_ctx, getnc_state, &getnc_state->site_res,
 867                                                       search_dn, scope, attrs,
 868                                                       search_filter);
 869                 if (ret != LDB_SUCCESS) {
 870                         return WERR_DS_DRA_INTERNAL_ERROR;
 871                 }
 872
 873                 if (req8->replica_flags & DRSUAPI_DS_REPLICA_NEIGHBOUR_RETURN_OBJECT_PARENTS) {
 874                         qsort(getnc_state->site_res->msgs,
 875                               getnc_state->site_res->count,
 876                               sizeof(getnc_state->site_res->msgs[0]),
 877                               (comparison_fn_t)site_res_cmp_parent_order);
 878                 } else {
 879                         qsort(getnc_state->site_res->msgs,
 880                               getnc_state->site_res->count,
 881                               sizeof(getnc_state->site_res->msgs[0]),
 882                               (comparison_fn_t)site_res_cmp_usn_order);
 883                 }
 884
 885                 getnc_state->uptodateness_vector = talloc_steal(getnc_state, req8->uptodateness_vector);
 886                 if (getnc_state->uptodateness_vector) {
 887                         /* make sure its sorted */
 888                         qsort(getnc_state->uptodateness_vector->cursors,
 889                               getnc_state->uptodateness_vector->count,
 890                               sizeof(getnc_state->uptodateness_vector->cursors[0]),
 891                               (comparison_fn_t)drsuapi_DsReplicaCursor_compare);
 892                 }
 893         }
 894
 895         /* Prefix mapping */
 896         schema = dsdb_get_schema(b_state->sam_ctx);
 897         if (!schema) {
 898                 DEBUG(0,("No schema in sam_ctx\n"));
 899                 return WERR_DS_DRA_INTERNAL_ERROR;
 900         }
 901
 902         r->out.ctr->ctr6.naming_context = talloc(mem_ctx, struct drsuapi_DsReplicaObjectIdentifier);
 903         *r->out.ctr->ctr6.naming_context = *ncRoot;
 904
 905         if (dsdb_find_guid_by_dn(b_state->sam_ctx, getnc_state->ncRoot_dn,
 906                                  &r->out.ctr->ctr6.naming_context->guid) != LDB_SUCCESS) {
 907                 DEBUG(0,(__location__ ": Failed to find GUID of ncRoot_dn %s\n",
 908                          ldb_dn_get_linearized(getnc_state->ncRoot_dn)));
 909                 return WERR_DS_DRA_INTERNAL_ERROR;
 910         }
 911
 912         /* find the SID if there is one */
 913         dsdb_find_sid_by_dn(b_state->sam_ctx, getnc_state->ncRoot_dn, &r->out.ctr->ctr6.naming_context->sid);
 914
 915         dsdb_get_oid_mappings_drsuapi(schema, true, mem_ctx, &ctr);
 916         r->out.ctr->ctr6.mapping_ctr = *ctr;
 917
 918         r->out.ctr->ctr6.source_dsa_guid = *(samdb_ntds_objectGUID(b_state->sam_ctx));
 919         r->out.ctr->ctr6.source_dsa_invocation_id = *(samdb_ntds_invocation_id(b_state->sam_ctx));
 920
 921         r->out.ctr->ctr6.old_highwatermark = req8->highwatermark;
 922         r->out.ctr->ctr6.new_highwatermark = req8->highwatermark;
 923
 924         r->out.ctr->ctr6.first_object = NULL;
 925         currentObject = &r->out.ctr->ctr6.first_object;
 926
 927         /* use this to force single objects at a time, which is useful
 928          * for working out what object is giving problems
 929          */
 930         max_objects = lp_parm_int(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "max object sync", 1000);
 931         if (req8->max_object_count < max_objects) {
 932                 max_objects = req8->max_object_count;
 933         }
 934
 935         for(i=getnc_state->num_sent;
 936             i<getnc_state->site_res->count &&
 937                     (r->out.ctr->ctr6.object_count < max_objects);
 938             i++) {
 939                 int uSN;
 940                 struct drsuapi_DsReplicaObjectListItemEx *obj;
 941                 struct ldb_message *msg = getnc_state->site_res->msgs[i];
 942
 943                 obj = talloc_zero(mem_ctx, struct drsuapi_DsReplicaObjectListItemEx);
 944
 945                 werr = get_nc_changes_build_object(obj, msg,
 946                                                    b_state->sam_ctx, getnc_state->ncRoot_dn,
 947                                                    schema, &session_key, getnc_state->min_usn,
 948                                                    req8->replica_flags, getnc_state->uptodateness_vector);
 949                 if (!W_ERROR_IS_OK(werr)) {
 950                         return werr;
 951                 }
 952
 953                 werr = get_nc_changes_add_links(b_state->sam_ctx, getnc_state,
 954                                                 getnc_state->ncRoot_dn,
 955                                                 schema, getnc_state->min_usn,
 956                                                 req8->replica_flags,
 957                                                 msg,
 958                                                 &getnc_state->la_list,
 959                                                 &getnc_state->la_count,
 960                                                 getnc_state->uptodateness_vector);
 961                 if (!W_ERROR_IS_OK(werr)) {
 962                         return werr;
 963                 }
 964
 965                 uSN = ldb_msg_find_attr_as_int(msg, "uSNChanged", -1);
 966                 if (uSN > r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn) {
 967                         r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn = uSN;
 968                 }
 969                 if (uSN > getnc_state->highest_usn) {
 970                         getnc_state->highest_usn = uSN;
 971                 }
 972
 973                 if (obj->meta_data_ctr == NULL) {
 974                         DEBUG(8,(__location__ ": getncchanges skipping send of object %s\n",
 975                                  ldb_dn_get_linearized(msg->dn)));
 976                         /* no attributes to send */
 977                         talloc_free(obj);
 978                         continue;
 979                 }
 980
 981                 r->out.ctr->ctr6.object_count++;
 982
 983                 *currentObject = obj;
 984                 currentObject = &obj->next_object;
 985
 986                 talloc_free(getnc_state->last_dn);
 987                 getnc_state->last_dn = ldb_dn_copy(getnc_state, msg->dn);
 988
 989                 DEBUG(8,(__location__ ": replicating object %s\n", ldb_dn_get_linearized(msg->dn)));
 990         }
 991
 992         getnc_state->num_sent += r->out.ctr->ctr6.object_count;
 993
 994         r->out.ctr->ctr6.nc_object_count = getnc_state->site_res->count;
 995
 996         /* the client can us to call UpdateRefs on its behalf to
 997            re-establish monitoring of the NC */
 998         if ((req8->replica_flags & DRSUAPI_DRS_ADD_REF) &&
 999             !GUID_all_zero(&req8->destination_dsa_guid)) {
1000                 struct drsuapi_DsReplicaUpdateRefsRequest1 ureq;
1001                 ureq.naming_context = ncRoot;
1002                 ureq.dest_dsa_dns_name = talloc_asprintf(mem_ctx, "%s._msdcs.%s",
1003                                                          GUID_string(mem_ctx, &req8->destination_dsa_guid),
1004                                                          lp_realm(dce_call->conn->dce_ctx->lp_ctx));
1005                 if (!ureq.dest_dsa_dns_name) {
1006                         return WERR_NOMEM;
1007                 }
1008                 ureq.dest_dsa_guid = req8->destination_dsa_guid;
1009                 ureq.options = DRSUAPI_DRS_ADD_REF |
1010                         DRSUAPI_DRS_ASYNC_OP |
1011                         DRSUAPI_DRS_GETCHG_CHECK;
1012                 werr = drsuapi_UpdateRefs(b_state, mem_ctx, &ureq);
1013                 if (!W_ERROR_IS_OK(werr)) {
1014                         DEBUG(0,(__location__ ": Failed UpdateRefs in DsGetNCChanges - %s\n",
1015                                  win_errstr(werr)));
1016                 }
1017         }
1018
1019         if (i < getnc_state->site_res->count) {
1020                 r->out.ctr->ctr6.more_data = true;
1021         } else {
1022                 r->out.ctr->ctr6.linked_attributes_count = getnc_state->la_count;
1023                 r->out.ctr->ctr6.linked_attributes = talloc_steal(mem_ctx, getnc_state->la_list);
1024
1025                 ldb_qsort(r->out.ctr->ctr6.linked_attributes, r->out.ctr->ctr6.linked_attributes_count,
1026                           sizeof(r->out.ctr->ctr6.linked_attributes[0]),
1027                           b_state->sam_ctx, (ldb_qsort_cmp_fn_t)linked_attribute_compare);
1028
1029                 r->out.ctr->ctr6.uptodateness_vector = talloc(mem_ctx, struct drsuapi_DsReplicaCursor2CtrEx);
1030                 r->out.ctr->ctr6.new_highwatermark.highest_usn = r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn;
1031
1032                 werr = get_nc_changes_udv(b_state->sam_ctx, getnc_state->ncRoot_dn,
1033                                           r->out.ctr->ctr6.uptodateness_vector,
1034                                           getnc_state->highest_usn);
1035                 if (!W_ERROR_IS_OK(werr)) {
1036                         return werr;
1037                 }
1038
1039                 talloc_free(getnc_state);
1040                 b_state->getncchanges_state = NULL;
1041         }
1042
1043         if (req8->extended_op != DRSUAPI_EXOP_NONE) {
1044                 r->out.ctr->ctr6.uptodateness_vector = NULL;
1045                 r->out.ctr->ctr6.nc_object_count = 0;
1046                 ZERO_STRUCT(r->out.ctr->ctr6.new_highwatermark);
1047         }
1048
1049         DEBUG(r->out.ctr->ctr6.more_data?2:1,
1050               ("DsGetNCChanges with uSNChanged >= %llu flags 0x%08x on %s gave %u objects (done %d/%d la=%d)\n",
1051                (unsigned long long)(req8->highwatermark.highest_usn+1),
1052                req8->replica_flags,
1053                ncRoot->dn, r->out.ctr->ctr6.object_count,
1054                i, r->out.ctr->ctr6.more_data?getnc_state->site_res->count:i,
1055                r->out.ctr->ctr6.linked_attributes_count));
1056
1057 #if 0
1058         if (!r->out.ctr->ctr6.more_data) {
1059                 NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsGetNCChanges, NDR_BOTH, r);
1060         }
1061 #endif
1062
1063         return WERR_OK;
1064 }