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