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
  34 /*
  35   build a DsReplicaObjectIdentifier from a ldb msg
  36  */
  37 static struct drsuapi_DsReplicaObjectIdentifier *get_object_identifier(TALLOC_CTX *mem_ctx,
  38                                                                        struct ldb_message *msg)
  39 {
  40         struct drsuapi_DsReplicaObjectIdentifier *identifier;
  41         struct dom_sid *sid;
  42
  43         identifier = talloc(mem_ctx, struct drsuapi_DsReplicaObjectIdentifier);
  44         if (identifier == NULL) {
  45                 return NULL;
  46         }
  47
  48         identifier->dn = ldb_dn_alloc_linearized(identifier, msg->dn);
  49         identifier->guid = samdb_result_guid(msg, "objectGUID");
  50
  51         sid = samdb_result_dom_sid(identifier, msg, "objectSid");
  52         if (sid) {
  53                 identifier->sid = *sid;
  54         } else {
  55                 ZERO_STRUCT(identifier->sid);
  56         }
  57         return identifier;
  58 }
  59
  60 /*
  61   drsuapi_DsGetNCChanges for one object
  62 */
  63 static WERROR get_nc_changes_build_object(struct drsuapi_DsReplicaObjectListItemEx *obj,
  64                                           struct ldb_message *msg,
  65                                           struct ldb_context *sam_ctx,
  66                                           struct ldb_dn *ncRoot_dn,
  67                                           struct dsdb_schema *schema,
  68                                           DATA_BLOB *session_key,
  69                                           uint64_t highest_usn,
  70                                           uint32_t replica_flags)
  71 {
  72         const struct ldb_val *md_value;
  73         int i, n;
  74         struct replPropertyMetaDataBlob md;
  75         uint32_t rid = 0;
  76         enum ndr_err_code ndr_err;
  77         uint32_t *attids;
  78         const char *rdn;
  79         const struct dsdb_attribute *rdn_sa;
  80
  81         if (ldb_dn_compare(ncRoot_dn, msg->dn) == 0) {
  82                 obj->is_nc_prefix = true;
  83                 obj->parent_object_guid = NULL;
  84         } else {
  85                 obj->is_nc_prefix = false;
  86                 obj->parent_object_guid = talloc(obj, struct GUID);
  87                 if (obj->parent_object_guid == NULL) {
  88                         return WERR_DS_DRA_INTERNAL_ERROR;
  89                 }
  90                 *obj->parent_object_guid = samdb_result_guid(msg, "parentGUID");
  91                 if (GUID_all_zero(obj->parent_object_guid)) {
  92                         DEBUG(0,(__location__ ": missing parentGUID for %s\n",
  93                                  ldb_dn_get_linearized(msg->dn)));
  94                         return WERR_DS_DRA_INTERNAL_ERROR;
  95                 }
  96         }
  97         obj->next_object = NULL;
  98
  99         md_value = ldb_msg_find_ldb_val(msg, "replPropertyMetaData");
 100         if (!md_value) {
 101                 /* nothing to send */
 102                 return WERR_OK;
 103         }
 104
 105         ndr_err = ndr_pull_struct_blob(md_value, obj,
 106                                        lp_iconv_convenience(ldb_get_opaque(sam_ctx, "loadparm")), &md,
 107                                        (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
 108         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 109                 return WERR_DS_DRA_INTERNAL_ERROR;
 110         }
 111
 112         if (md.version != 1) {
 113                 return WERR_DS_DRA_INTERNAL_ERROR;
 114         }
 115
 116         rdn = ldb_dn_get_rdn_name(msg->dn);
 117         if (rdn == NULL) {
 118                 DEBUG(0,(__location__ ": No rDN for %s\n", ldb_dn_get_linearized(msg->dn)));
 119                 return WERR_DS_DRA_INTERNAL_ERROR;
 120         }
 121
 122         rdn_sa = dsdb_attribute_by_lDAPDisplayName(schema, rdn);
 123         if (rdn_sa == NULL) {
 124                 DEBUG(0,(__location__ ": Can't find dsds_attribute for rDN %s in %s\n",
 125                          rdn, ldb_dn_get_linearized(msg->dn)));
 126                 return WERR_DS_DRA_INTERNAL_ERROR;
 127         }
 128
 129         obj->meta_data_ctr = talloc(obj, struct drsuapi_DsReplicaMetaDataCtr);
 130         attids = talloc_array(obj, uint32_t, md.ctr.ctr1.count);
 131
 132         obj->object.identifier = get_object_identifier(obj, msg);
 133         if (obj->object.identifier == NULL) {
 134                 return WERR_NOMEM;
 135         }
 136         dom_sid_split_rid(NULL, &obj->object.identifier->sid, NULL, &rid);
 137
 138         obj->meta_data_ctr->meta_data = talloc_array(obj, struct drsuapi_DsReplicaMetaData, md.ctr.ctr1.count);
 139         for (n=i=0; i<md.ctr.ctr1.count; i++) {
 140                 const struct dsdb_attribute *sa;
 141                 /* if the attribute has not changed, and it is not the
 142                    instanceType then don't include it */
 143                 if (md.ctr.ctr1.array[i].local_usn < highest_usn &&
 144                     md.ctr.ctr1.array[i].attid != DRSUAPI_ATTRIBUTE_instanceType) continue;
 145
 146                 /* don't include the rDN */
 147                 if (md.ctr.ctr1.array[i].attid == rdn_sa->attributeID_id) continue;
 148
 149                 sa = dsdb_attribute_by_attributeID_id(schema, md.ctr.ctr1.array[i].attid);
 150                 if (sa->linkID) {
 151                         struct ldb_message_element *el;
 152                         el = ldb_msg_find_element(msg, sa->lDAPDisplayName);
 153                         if (el && el->num_values && dsdb_dn_is_upgraded_link_val(&el->values[0])) {
 154                                 /* don't send upgraded links inline */
 155                                 continue;
 156                         }
 157                 }
 158
 159                 obj->meta_data_ctr->meta_data[n].originating_change_time = md.ctr.ctr1.array[i].originating_change_time;
 160                 obj->meta_data_ctr->meta_data[n].version = md.ctr.ctr1.array[i].version;
 161                 obj->meta_data_ctr->meta_data[n].originating_invocation_id = md.ctr.ctr1.array[i].originating_invocation_id;
 162                 obj->meta_data_ctr->meta_data[n].originating_usn = md.ctr.ctr1.array[i].originating_usn;
 163                 attids[n] = md.ctr.ctr1.array[i].attid;
 164                 n++;
 165         }
 166
 167         /*
 168           note that if n==0 we still need to send the change, as it
 169           could be a rename, which changes the uSNChanged, but not any
 170           of the replicated attributes
 171          */
 172
 173         obj->meta_data_ctr->count = n;
 174
 175         obj->object.flags = DRSUAPI_DS_REPLICA_OBJECT_FROM_MASTER;
 176         obj->object.attribute_ctr.num_attributes = obj->meta_data_ctr->count;
 177         obj->object.attribute_ctr.attributes = talloc_array(obj, struct drsuapi_DsReplicaAttribute,
 178                                                             obj->object.attribute_ctr.num_attributes);
 179
 180         /*
 181          * Note that the meta_data array and the attributes array must
 182          * be the same size and in the same order
 183          */
 184         for (i=0; i<obj->object.attribute_ctr.num_attributes; i++) {
 185                 struct ldb_message_element *el;
 186                 WERROR werr;
 187                 const struct dsdb_attribute *sa;
 188
 189                 sa = dsdb_attribute_by_attributeID_id(schema, attids[i]);
 190                 if (!sa) {
 191                         DEBUG(0,("Unable to find attributeID %u in schema\n", attids[i]));
 192                         return WERR_DS_DRA_INTERNAL_ERROR;
 193                 }
 194
 195                 el = ldb_msg_find_element(msg, sa->lDAPDisplayName);
 196                 if (el == NULL) {
 197                         /* this happens for attributes that have been removed */
 198                         DEBUG(5,("No element '%s' for attributeID %u in message\n",
 199                                  sa->lDAPDisplayName, attids[i]));
 200                         ZERO_STRUCT(obj->object.attribute_ctr.attributes[i]);
 201                         obj->object.attribute_ctr.attributes[i].attid = attids[i];
 202                 } else {
 203                         werr = dsdb_attribute_ldb_to_drsuapi(sam_ctx, schema, el, obj,
 204                                                              &obj->object.attribute_ctr.attributes[i]);
 205                         if (!W_ERROR_IS_OK(werr)) {
 206                                 DEBUG(0,("Unable to convert %s to DRS object - %s\n",
 207                                          sa->lDAPDisplayName, win_errstr(werr)));
 208                                 return werr;
 209                         }
 210                         /* if DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING is set
 211                          * check if attribute is secret and send a null value
 212                          */
 213                         if (replica_flags & DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING) {
 214                                 drsuapi_process_secret_attribute(&obj->object.attribute_ctr.attributes[i],
 215                                                                  &obj->meta_data_ctr->meta_data[i]);
 216                         }
 217                         /* some attributes needs to be encrypted
 218                            before being sent */
 219                         werr = drsuapi_encrypt_attribute(obj, session_key, rid,
 220                                                          &obj->object.attribute_ctr.attributes[i]);
 221                         if (!W_ERROR_IS_OK(werr)) {
 222                                 DEBUG(0,("Unable to encrypt %s in DRS object - %s\n",
 223                                          sa->lDAPDisplayName, win_errstr(werr)));
 224                                 return werr;
 225                         }
 226                 }
 227         }
 228
 229         return WERR_OK;
 230 }
 231
 232
 233 /*
 234   add one linked attribute from an object to the list of linked
 235   attributes in a getncchanges request
 236  */
 237 static WERROR get_nc_changes_add_la(TALLOC_CTX *mem_ctx,
 238                                     struct ldb_context *sam_ctx,
 239                                     const struct dsdb_schema *schema,
 240                                     const struct dsdb_attribute *sa,
 241                                     struct ldb_message *msg,
 242                                     struct dsdb_dn *dsdb_dn,
 243                                     struct drsuapi_DsReplicaLinkedAttribute **la_list,
 244                                     uint32_t *la_count)
 245 {
 246         struct drsuapi_DsReplicaLinkedAttribute *la;
 247         bool active;
 248         NTSTATUS status;
 249         WERROR werr;
 250
 251         (*la_list) = talloc_realloc(mem_ctx, *la_list, struct drsuapi_DsReplicaLinkedAttribute, (*la_count)+1);
 252         W_ERROR_HAVE_NO_MEMORY(*la_list);
 253
 254         la = &(*la_list)[*la_count];
 255
 256         la->identifier = get_object_identifier(*la_list, msg);
 257         W_ERROR_HAVE_NO_MEMORY(la->identifier);
 258
 259         active = ldb_dn_get_extended_component(dsdb_dn->dn, "DELETED")?false:true;
 260
 261         la->attid = sa->attributeID_id;
 262         la->flags = active?DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE:0;
 263
 264         status = dsdb_get_extended_dn_nttime(dsdb_dn->dn, &la->originating_add_time, "RMD_ADDTIME");
 265         if (!NT_STATUS_IS_OK(status)) {
 266                 return ntstatus_to_werror(status);
 267         }
 268         status = dsdb_get_extended_dn_uint32(dsdb_dn->dn, &la->meta_data.version, "RMD_VERSION");
 269         if (!NT_STATUS_IS_OK(status)) {
 270                 return ntstatus_to_werror(status);
 271         }
 272         status = dsdb_get_extended_dn_nttime(dsdb_dn->dn, &la->meta_data.originating_change_time, "RMD_CHANGETIME");
 273         if (!NT_STATUS_IS_OK(status)) {
 274                 return ntstatus_to_werror(status);
 275         }
 276         status = dsdb_get_extended_dn_guid(dsdb_dn->dn, &la->meta_data.originating_invocation_id, "RMD_INVOCID");
 277         if (!NT_STATUS_IS_OK(status)) {
 278                 return ntstatus_to_werror(status);
 279         }
 280         status = dsdb_get_extended_dn_uint64(dsdb_dn->dn, &la->meta_data.originating_usn, "RMD_ORIGINATING_USN");
 281         if (!NT_STATUS_IS_OK(status)) {
 282                 return ntstatus_to_werror(status);
 283         }
 284
 285         werr = dsdb_dn_la_to_blob(sam_ctx, sa, schema, *la_list, dsdb_dn, &la->value.blob);
 286         W_ERROR_NOT_OK_RETURN(werr);
 287
 288         (*la_count)++;
 289         return WERR_OK;
 290 }
 291
 292
 293 /*
 294   add linked attributes from an object to the list of linked
 295   attributes in a getncchanges request
 296  */
 297 static WERROR get_nc_changes_add_links(struct ldb_context *sam_ctx,
 298                                        TALLOC_CTX *mem_ctx,
 299                                        struct ldb_dn *ncRoot_dn,
 300                                        struct dsdb_schema *schema,
 301                                        uint64_t highest_usn,
 302                                        uint32_t replica_flags,
 303                                        struct ldb_message *msg,
 304                                        struct drsuapi_DsReplicaLinkedAttribute **la_list,
 305                                        uint32_t *la_count)
 306 {
 307         int i;
 308         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 309         uint64_t uSNChanged = ldb_msg_find_attr_as_int(msg, "uSNChanged", -1);
 310
 311         for (i=0; i<msg->num_elements; i++) {
 312                 struct ldb_message_element *el = &msg->elements[i];
 313                 const struct dsdb_attribute *sa;
 314                 int j;
 315
 316                 sa = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
 317
 318                 if (!sa || sa->linkID == 0 || (sa->linkID & 1)) {
 319                         /* we only want forward links */
 320                         continue;
 321                 }
 322
 323                 if (el->num_values && !dsdb_dn_is_upgraded_link_val(&el->values[0])) {
 324                         /* its an old style link, it will have been
 325                          * sent in the main replication data */
 326                         continue;
 327                 }
 328
 329                 for (j=0; j<el->num_values; j++) {
 330                         struct dsdb_dn *dsdb_dn;
 331                         uint64_t local_usn;
 332                         NTSTATUS status;
 333                         WERROR werr;
 334
 335                         dsdb_dn = dsdb_dn_parse(tmp_ctx, sam_ctx, &el->values[j], sa->syntax->ldap_oid);
 336                         if (dsdb_dn == NULL) {
 337                                 DEBUG(1,(__location__ ": Failed to parse DN for %s in %s\n",
 338                                          el->name, ldb_dn_get_linearized(msg->dn)));
 339                                 talloc_free(tmp_ctx);
 340                                 return WERR_DS_DRA_INTERNAL_ERROR;
 341                         }
 342
 343                         status = dsdb_get_extended_dn_uint64(dsdb_dn->dn, &local_usn, "RMD_LOCAL_USN");
 344                         if (!NT_STATUS_IS_OK(status)) {
 345                                 /* this can happen for attributes
 346                                    given to us with old style meta
 347                                    data */
 348                                 continue;
 349                         }
 350
 351                         if (local_usn > uSNChanged) {
 352                                 DEBUG(1,(__location__ ": uSNChanged less than RMD_LOCAL_USN for %s on %s\n",
 353                                          el->name, ldb_dn_get_linearized(msg->dn)));
 354                                 talloc_free(tmp_ctx);
 355                                 return WERR_DS_DRA_INTERNAL_ERROR;
 356                         }
 357
 358                         if (local_usn < highest_usn) {
 359                                 continue;
 360                         }
 361
 362                         werr = get_nc_changes_add_la(mem_ctx, sam_ctx, schema, sa, msg,
 363                                                      dsdb_dn, la_list, la_count);
 364                         if (!W_ERROR_IS_OK(werr)) {
 365                                 talloc_free(tmp_ctx);
 366                                 return werr;
 367                         }
 368                 }
 369         }
 370
 371         talloc_free(tmp_ctx);
 372         return WERR_OK;
 373 }
 374
 375 /*
 376   load replUpToDateVector from a DN
 377  */
 378 static WERROR load_udv(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 379                        struct ldb_dn *dn, struct replUpToDateVectorBlob *ouv)
 380 {
 381         const char *attrs[] = { "replUpToDateVector", NULL };
 382         struct ldb_result *res = NULL;
 383         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 384         struct ldb_message_element *el;
 385         enum ndr_err_code ndr_err;
 386
 387         ZERO_STRUCTP(ouv);
 388
 389         if (ldb_search(sam_ctx, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, NULL) != LDB_SUCCESS ||
 390             res->count < 1) {
 391                 DEBUG(0,("load_udv: failed to read partition object\n"));
 392                 talloc_free(tmp_ctx);
 393                 return WERR_DS_DRA_INTERNAL_ERROR;
 394         }
 395
 396         el = ldb_msg_find_element(res->msgs[0], "replUpToDateVector");
 397         if (el == NULL || el->num_values < 1) {
 398                 talloc_free(tmp_ctx);
 399                 ouv->version = 2;
 400                 return WERR_OK;
 401         }
 402
 403         ndr_err = ndr_pull_struct_blob(&el->values[0],
 404                                        mem_ctx, lp_iconv_convenience(ldb_get_opaque(sam_ctx, "loadparm")),
 405                                        ouv,
 406                                        (ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
 407         talloc_free(tmp_ctx);
 408         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 409                 DEBUG(0,(__location__ ": Failed to parse replUpToDateVector for %s\n",
 410                          ldb_dn_get_linearized(dn)));
 411                 return WERR_DS_DRA_INTERNAL_ERROR;
 412         }
 413
 414         return WERR_OK;
 415
 416 }
 417
 418 /*
 419   fill in the cursors return based on the replUpToDateVector for the ncRoot_dn
 420  */
 421 static WERROR get_nc_changes_udv(struct ldb_context *sam_ctx,
 422                                  struct ldb_dn *ncRoot_dn,
 423                                  struct drsuapi_DsReplicaCursor2CtrEx *udv,
 424                                  uint64_t highestUSN)
 425 {
 426         WERROR werr;
 427         struct drsuapi_DsReplicaCursor2 *tmp_cursor;
 428         NTTIME now;
 429         time_t t = time(NULL);
 430         struct replUpToDateVectorBlob ouv;
 431         int i;
 432
 433         werr = load_udv(sam_ctx, udv, ncRoot_dn, &ouv);
 434         if (!W_ERROR_IS_OK(werr)) {
 435                 return werr;
 436         }
 437
 438         tmp_cursor = talloc(udv, struct drsuapi_DsReplicaCursor2);
 439         tmp_cursor->source_dsa_invocation_id = *(samdb_ntds_invocation_id(sam_ctx));
 440         tmp_cursor->highest_usn = highestUSN;
 441         unix_to_nt_time(&now, t);
 442         tmp_cursor->last_sync_success = now;
 443
 444         udv->count = ouv.ctr.ctr2.count;
 445         udv->cursors = talloc_steal(udv, ouv.ctr.ctr2.cursors);
 446
 447         for (i=0; i<udv->count; i++) {
 448                 if (GUID_equal(&tmp_cursor->source_dsa_invocation_id,
 449                                &udv->cursors[i].source_dsa_invocation_id)) {
 450                         udv->cursors[i] = *tmp_cursor;
 451                         break;
 452                 }
 453         }
 454         if (i == udv->count) {
 455                 udv->cursors = talloc_realloc(udv, udv->cursors, struct drsuapi_DsReplicaCursor2, udv->count+1);
 456                 if (!udv->cursors) {
 457                         return WERR_DS_DRA_INTERNAL_ERROR;
 458                 }
 459                 udv->cursors[udv->count] = *tmp_cursor;
 460                 udv->count++;
 461         }
 462
 463         qsort(udv->cursors, udv->count,
 464               sizeof(struct drsuapi_DsReplicaCursor2),
 465               (comparison_fn_t)drsuapi_DsReplicaCursor2_compare);
 466
 467         return WERR_OK;
 468 }
 469
 470 /*
 471   sort the objects we send by tree order
 472  */
 473 static int site_res_cmp_parent_order(const struct ldb_message **m1, const struct ldb_message **m2)
 474 {
 475         return ldb_dn_compare((*m2)->dn, (*m1)->dn);
 476 }
 477
 478 /*
 479   sort the objects we send first by uSNChanged
 480  */
 481 static int site_res_cmp_usn_order(const struct ldb_message **m1, const struct ldb_message **m2)
 482 {
 483         unsigned usnchanged1, usnchanged2;
 484         unsigned cn1, cn2;
 485         cn1 = ldb_dn_get_comp_num((*m1)->dn);
 486         cn2 = ldb_dn_get_comp_num((*m2)->dn);
 487         if (cn1 != cn2) {
 488                 return cn1 > cn2 ? 1 : -1;
 489         }
 490         usnchanged1 = ldb_msg_find_attr_as_uint(*m1, "uSNChanged", 0);
 491         usnchanged2 = ldb_msg_find_attr_as_uint(*m2, "uSNChanged", 0);
 492         if (usnchanged1 == usnchanged2) {
 493                 return 0;
 494         }
 495         return usnchanged1 > usnchanged2 ? 1 : -1;
 496 }
 497
 498
 499 /* state of a partially completed getncchanges call */
 500 struct drsuapi_getncchanges_state {
 501         struct ldb_result *site_res;
 502         uint32_t num_sent;
 503         struct ldb_dn *ncRoot_dn;
 504         uint64_t min_usn;
 505         uint64_t highest_usn;
 506         struct ldb_dn *last_dn;
 507         struct drsuapi_DsReplicaLinkedAttribute *la_list;
 508         uint32_t la_count;
 509 };
 510
 511 /*
 512   drsuapi_DsGetNCChanges
 513
 514   see MS-DRSR 4.1.10.5.2 for basic logic of this function
 515 */
 516 WERROR dcesrv_drsuapi_DsGetNCChanges(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
 517                                      struct drsuapi_DsGetNCChanges *r)
 518 {
 519         struct drsuapi_DsReplicaObjectIdentifier *ncRoot;
 520         int ret;
 521         int i;
 522         struct dsdb_schema *schema;
 523         struct drsuapi_DsReplicaOIDMapping_Ctr *ctr;
 524         struct drsuapi_DsReplicaObjectListItemEx **currentObject;
 525         NTSTATUS status;
 526         DATA_BLOB session_key;
 527         const char *attrs[] = { "*", "distinguishedName",
 528                                 "nTSecurityDescriptor",
 529                                 "parentGUID",
 530                                 "replPropertyMetaData",
 531                                 "unicodePwd",
 532                                 "dBCSPwd",
 533                                 "ntPwdHistory",
 534                                 "lmPwdHistory",
 535                                 "supplementalCredentials",
 536                                 NULL };
 537         WERROR werr;
 538         struct dcesrv_handle *h;
 539         struct drsuapi_bind_state *b_state;
 540         struct drsuapi_getncchanges_state *getnc_state;
 541         struct drsuapi_DsGetNCChangesRequest8 *req8;
 542         uint32_t options;
 543         uint32_t max_objects;
 544
 545         DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
 546         b_state = h->data;
 547
 548         *r->out.level_out = 6;
 549         /* TODO: linked attributes*/
 550         r->out.ctr->ctr6.linked_attributes_count = 0;
 551         r->out.ctr->ctr6.linked_attributes = NULL;
 552
 553         r->out.ctr->ctr6.object_count = 0;
 554         r->out.ctr->ctr6.nc_object_count = 0;
 555         r->out.ctr->ctr6.more_data = false;
 556         r->out.ctr->ctr6.uptodateness_vector = NULL;
 557
 558         /* a RODC doesn't allow for any replication */
 559         if (samdb_rodc(ldb_get_opaque(b_state->sam_ctx, "loadparm"))) {
 560                 DEBUG(0,(__location__ ": DsGetNCChanges attempt on RODC\n"));
 561                 return WERR_DS_DRA_SOURCE_DISABLED;
 562         }
 563
 564         /* Check request revision.
 565            TODO: Adding mappings to req8 from the other levels
 566          */
 567         if (r->in.level != 8) {
 568                 DEBUG(0,(__location__ ": Request for DsGetNCChanges with unsupported level %u\n",
 569                          r->in.level));
 570                 return WERR_REVISION_MISMATCH;
 571         }
 572
 573         req8 = &r->in.req->req8;
 574
 575         /* Perform access checks. */
 576         /* TODO: we need to support a sync on a specific non-root
 577          * DN. We'll need to find the real partition root here */
 578         ncRoot = req8->naming_context;
 579         if (ncRoot == NULL) {
 580                 DEBUG(0,(__location__ ": Request for DsGetNCChanges with no NC\n"));
 581                 return WERR_DS_DRA_INVALID_PARAMETER;
 582         }
 583
 584         if (samdb_ntds_options(b_state->sam_ctx, &options) != LDB_SUCCESS) {
 585                 return WERR_DS_DRA_INTERNAL_ERROR;
 586         }
 587
 588         if ((options & DS_NTDSDSA_OPT_DISABLE_OUTBOUND_REPL) &&
 589             !(req8->replica_flags & DRSUAPI_DRS_SYNC_FORCED)) {
 590                 return WERR_DS_DRA_SOURCE_DISABLED;
 591         }
 592
 593
 594         if (req8->replica_flags & DRSUAPI_DS_REPLICA_NEIGHBOUR_FULL_SYNC_PACKET) {
 595                 /* Ignore the _in_ uptpdateness vector*/
 596                 req8->uptodateness_vector = NULL;
 597         }
 598
 599         werr = drs_security_level_check(dce_call, "DsGetNCChanges");
 600         if (!W_ERROR_IS_OK(werr)) {
 601                 return werr;
 602         }
 603
 604         getnc_state = b_state->getncchanges_state;
 605
 606         /* see if a previous replication has been abandoned */
 607         if (getnc_state) {
 608                 struct ldb_dn *new_dn = ldb_dn_new(getnc_state, b_state->sam_ctx, ncRoot->dn);
 609                 if (ldb_dn_compare(new_dn, getnc_state->ncRoot_dn) != 0) {
 610                         DEBUG(0,(__location__ ": DsGetNCChanges 2nd replication on different DN %s %s (last_dn %s)\n",
 611                                  ldb_dn_get_linearized(new_dn),
 612                                  ldb_dn_get_linearized(getnc_state->ncRoot_dn),
 613                                  ldb_dn_get_linearized(getnc_state->last_dn)));
 614                         talloc_free(getnc_state);
 615                         getnc_state = NULL;
 616                 }
 617         }
 618
 619         if (getnc_state == NULL) {
 620                 getnc_state = talloc_zero(b_state, struct drsuapi_getncchanges_state);
 621                 if (getnc_state == NULL) {
 622                         return WERR_NOMEM;
 623                 }
 624                 b_state->getncchanges_state = getnc_state;
 625                 getnc_state->ncRoot_dn = ldb_dn_new(getnc_state, b_state->sam_ctx, ncRoot->dn);
 626         }
 627
 628         if (!ldb_dn_validate(getnc_state->ncRoot_dn) ||
 629             ldb_dn_is_null(getnc_state->ncRoot_dn)) {
 630                 DEBUG(0,(__location__ ": Bad DN '%s'\n", ncRoot->dn));
 631                 return WERR_DS_DRA_INVALID_PARAMETER;
 632         }
 633
 634         /* we need the session key for encrypting password attributes */
 635         status = dcesrv_inherited_session_key(dce_call->conn, &session_key);
 636         if (!NT_STATUS_IS_OK(status)) {
 637                 DEBUG(0,(__location__ ": Failed to get session key\n"));
 638                 return WERR_DS_DRA_INTERNAL_ERROR;
 639         }
 640
 641         /* we don't yet support extended operations */
 642         if (req8->extended_op != DRSUAPI_EXOP_NONE) {
 643                 DEBUG(0,(__location__ ": Request for DsGetNCChanges extended op 0x%x\n",
 644                          (unsigned)req8->extended_op));
 645                 return WERR_DS_DRA_NOT_SUPPORTED;
 646         }
 647
 648         /*
 649            TODO: MS-DRSR section 4.1.10.1.1
 650            Work out if this is the start of a new cycle */
 651
 652         if (getnc_state->site_res == NULL) {
 653                 char* search_filter;
 654                 enum ldb_scope scope = LDB_SCOPE_SUBTREE;
 655                 const char *extra_filter;
 656
 657                 extra_filter = lp_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "object filter");
 658
 659                 getnc_state->min_usn = req8->highwatermark.highest_usn;
 660
 661                 /* Construct response. */
 662                 search_filter = talloc_asprintf(mem_ctx,
 663                                                 "(uSNChanged>=%llu)",
 664                                                 (unsigned long long)(getnc_state->min_usn+1));
 665
 666                 if (extra_filter) {
 667                         search_filter = talloc_asprintf(mem_ctx, "(&%s(%s))", search_filter, extra_filter);
 668                 }
 669
 670                 if (req8->replica_flags & DRSUAPI_DS_REPLICA_NEIGHBOUR_CRITICAL_ONLY) {
 671                         search_filter = talloc_asprintf(mem_ctx,
 672                                                         "(&%s(isCriticalSystemObject=TRUE))",
 673                                                         search_filter);
 674                 }
 675
 676                 if (req8->replica_flags & DRSUAPI_DS_REPLICA_NEIGHBOUR_ASYNC_REP) {
 677                         scope = LDB_SCOPE_BASE;
 678                 }
 679
 680                 DEBUG(1,(__location__ ": getncchanges on %s using filter %s\n",
 681                          ldb_dn_get_linearized(getnc_state->ncRoot_dn), search_filter));
 682                 ret = drsuapi_search_with_extended_dn(b_state->sam_ctx, getnc_state, &getnc_state->site_res,
 683                                                       getnc_state->ncRoot_dn, scope, attrs,
 684                                                       search_filter);
 685                 if (ret != LDB_SUCCESS) {
 686                         return WERR_DS_DRA_INTERNAL_ERROR;
 687                 }
 688
 689                 if (req8->replica_flags & DRSUAPI_DS_REPLICA_NEIGHBOUR_RETURN_OBJECT_PARENTS) {
 690                         qsort(getnc_state->site_res->msgs,
 691                               getnc_state->site_res->count,
 692                               sizeof(getnc_state->site_res->msgs[0]),
 693                               (comparison_fn_t)site_res_cmp_parent_order);
 694                 } else {
 695                         qsort(getnc_state->site_res->msgs,
 696                               getnc_state->site_res->count,
 697                               sizeof(getnc_state->site_res->msgs[0]),
 698                               (comparison_fn_t)site_res_cmp_usn_order);
 699                 }
 700
 701         }
 702
 703         /* Prefix mapping */
 704         schema = dsdb_get_schema(b_state->sam_ctx);
 705         if (!schema) {
 706                 DEBUG(0,("No schema in sam_ctx\n"));
 707                 return WERR_DS_DRA_INTERNAL_ERROR;
 708         }
 709
 710         r->out.ctr->ctr6.naming_context = talloc(mem_ctx, struct drsuapi_DsReplicaObjectIdentifier);
 711         *r->out.ctr->ctr6.naming_context = *ncRoot;
 712
 713         if (dsdb_find_guid_by_dn(b_state->sam_ctx, getnc_state->ncRoot_dn,
 714                                  &r->out.ctr->ctr6.naming_context->guid) != LDB_SUCCESS) {
 715                 DEBUG(0,(__location__ ": Failed to find GUID of ncRoot_dn %s\n",
 716                          ldb_dn_get_linearized(getnc_state->ncRoot_dn)));
 717                 return WERR_DS_DRA_INTERNAL_ERROR;
 718         }
 719
 720         /* find the SID if there is one */
 721         dsdb_find_sid_by_dn(b_state->sam_ctx, getnc_state->ncRoot_dn, &r->out.ctr->ctr6.naming_context->sid);
 722
 723         dsdb_get_oid_mappings_drsuapi(schema, true, mem_ctx, &ctr);
 724         r->out.ctr->ctr6.mapping_ctr = *ctr;
 725
 726         r->out.ctr->ctr6.source_dsa_guid = *(samdb_ntds_objectGUID(b_state->sam_ctx));
 727         r->out.ctr->ctr6.source_dsa_invocation_id = *(samdb_ntds_invocation_id(b_state->sam_ctx));
 728
 729         r->out.ctr->ctr6.old_highwatermark = req8->highwatermark;
 730         r->out.ctr->ctr6.new_highwatermark = req8->highwatermark;
 731
 732         r->out.ctr->ctr6.first_object = NULL;
 733         currentObject = &r->out.ctr->ctr6.first_object;
 734
 735         /* use this to force single objects at a time, which is useful
 736          * for working out what object is giving problems
 737          */
 738         max_objects = lp_parm_int(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "max object sync", 1000);
 739         if (req8->max_object_count < max_objects) {
 740                 max_objects = req8->max_object_count;
 741         }
 742
 743         for(i=getnc_state->num_sent;
 744             i<getnc_state->site_res->count &&
 745                     (r->out.ctr->ctr6.object_count < max_objects);
 746             i++) {
 747                 int uSN;
 748                 struct drsuapi_DsReplicaObjectListItemEx *obj;
 749                 struct ldb_message *msg = getnc_state->site_res->msgs[i];
 750
 751                 obj = talloc_zero(mem_ctx, struct drsuapi_DsReplicaObjectListItemEx);
 752
 753                 werr = get_nc_changes_build_object(obj, msg,
 754                                                    b_state->sam_ctx, getnc_state->ncRoot_dn,
 755                                                    schema, &session_key, getnc_state->min_usn,
 756                                                    req8->replica_flags);
 757                 if (!W_ERROR_IS_OK(werr)) {
 758                         return werr;
 759                 }
 760
 761                 werr = get_nc_changes_add_links(b_state->sam_ctx, getnc_state,
 762                                                 getnc_state->ncRoot_dn,
 763                                                 schema, getnc_state->min_usn,
 764                                                 req8->replica_flags,
 765                                                 msg,
 766                                                 &getnc_state->la_list,
 767                                                 &getnc_state->la_count);
 768                 if (!W_ERROR_IS_OK(werr)) {
 769                         return werr;
 770                 }
 771
 772                 uSN = ldb_msg_find_attr_as_int(msg, "uSNChanged", -1);
 773                 if (uSN > r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn) {
 774                         r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn = uSN;
 775                 }
 776                 if (uSN > getnc_state->highest_usn) {
 777                         getnc_state->highest_usn = uSN;
 778                 }
 779
 780                 if (obj->meta_data_ctr == NULL) {
 781                         DEBUG(0,(__location__ ": getncchanges skipping send of object %s\n",
 782                                  ldb_dn_get_linearized(msg->dn)));
 783                         /* no attributes to send */
 784                         talloc_free(obj);
 785                         continue;
 786                 }
 787
 788                 r->out.ctr->ctr6.object_count++;
 789
 790                 *currentObject = obj;
 791                 currentObject = &obj->next_object;
 792
 793                 talloc_free(getnc_state->last_dn);
 794                 getnc_state->last_dn = ldb_dn_copy(getnc_state, msg->dn);
 795
 796                 DEBUG(8,(__location__ ": replicating object %s\n", ldb_dn_get_linearized(msg->dn)));
 797         }
 798
 799         getnc_state->num_sent += r->out.ctr->ctr6.object_count;
 800
 801         r->out.ctr->ctr6.nc_object_count = getnc_state->site_res->count;
 802
 803         /* the client can us to call UpdateRefs on its behalf to
 804            re-establish monitoring of the NC */
 805         if ((req8->replica_flags & DRSUAPI_DRS_ADD_REF) &&
 806             !GUID_all_zero(&req8->destination_dsa_guid)) {
 807                 struct drsuapi_DsReplicaUpdateRefsRequest1 ureq;
 808                 ureq.naming_context = ncRoot;
 809                 ureq.dest_dsa_dns_name = talloc_asprintf(mem_ctx, "%s._msdcs.%s",
 810                                                          GUID_string(mem_ctx, &req8->destination_dsa_guid),
 811                                                          lp_realm(dce_call->conn->dce_ctx->lp_ctx));
 812                 if (!ureq.dest_dsa_dns_name) {
 813                         return WERR_NOMEM;
 814                 }
 815                 ureq.dest_dsa_guid = req8->destination_dsa_guid;
 816                 ureq.options = DRSUAPI_DS_REPLICA_UPDATE_ADD_REFERENCE |
 817                         DRSUAPI_DS_REPLICA_UPDATE_ASYNCHRONOUS_OPERATION |
 818                         DRSUAPI_DS_REPLICA_UPDATE_GETCHG_CHECK;
 819                 werr = drsuapi_UpdateRefs(b_state, mem_ctx, &ureq);
 820                 if (!W_ERROR_IS_OK(werr)) {
 821                         DEBUG(0,(__location__ ": Failed UpdateRefs in DsGetNCChanges - %s\n",
 822                                  win_errstr(werr)));
 823                 }
 824         }
 825
 826         if (i < getnc_state->site_res->count) {
 827                 r->out.ctr->ctr6.more_data = true;
 828         } else {
 829                 r->out.ctr->ctr6.linked_attributes_count = getnc_state->la_count;
 830                 r->out.ctr->ctr6.linked_attributes = talloc_steal(mem_ctx, getnc_state->la_list);
 831                 r->out.ctr->ctr6.uptodateness_vector = talloc(mem_ctx, struct drsuapi_DsReplicaCursor2CtrEx);
 832                 r->out.ctr->ctr6.uptodateness_vector->version = 2;
 833                 r->out.ctr->ctr6.uptodateness_vector->reserved1 = 0;
 834                 r->out.ctr->ctr6.uptodateness_vector->reserved2 = 0;
 835
 836                 r->out.ctr->ctr6.new_highwatermark.highest_usn = r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn;
 837
 838                 werr = get_nc_changes_udv(b_state->sam_ctx, getnc_state->ncRoot_dn,
 839                                           r->out.ctr->ctr6.uptodateness_vector,
 840                                           getnc_state->highest_usn);
 841                 if (!W_ERROR_IS_OK(werr)) {
 842                         return werr;
 843                 }
 844
 845                 talloc_free(getnc_state);
 846                 b_state->getncchanges_state = NULL;
 847         }
 848
 849         DEBUG(r->out.ctr->ctr6.more_data?2:1,
 850               ("DsGetNCChanges with uSNChanged >= %llu flags 0x%08x on %s gave %u objects (done %d/%d la=%d)\n",
 851                (unsigned long long)(req8->highwatermark.highest_usn+1),
 852                req8->replica_flags,
 853                ncRoot->dn, r->out.ctr->ctr6.object_count,
 854                i, r->out.ctr->ctr6.more_data?getnc_state->site_res->count:i,
 855                r->out.ctr->ctr6.linked_attributes_count));
 856
 857 #if 0
 858         if (!r->out.ctr->ctr6.more_data) {
 859                 NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsGetNCChanges, NDR_BOTH, r);
 860         }
 861 #endif
 862
 863         return WERR_OK;
 864 }