source4/dsdb/repl/drepl_partitions.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3    DSDB replication service
   4
   5    Copyright (C) Stefan Metzmacher 2007
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 */
  21
  22 #include "includes.h"
  23 #include "dsdb/samdb/samdb.h"
  24 #include "auth/auth.h"
  25 #include "smbd/service.h"
  26 #include "lib/events/events.h"
  27 #include "lib/messaging/irpc.h"
  28 #include "dsdb/repl/drepl_service.h"
  29 #include "lib/ldb/include/ldb_errors.h"
  30 #include "../lib/util/dlinklist.h"
  31 #include "librpc/gen_ndr/ndr_misc.h"
  32 #include "librpc/gen_ndr/ndr_drsuapi.h"
  33 #include "librpc/gen_ndr/ndr_drsblobs.h"
  34 #include "param/param.h"
  35
  36 WERROR dreplsrv_load_partitions(struct dreplsrv_service *s)
  37 {
  38         WERROR status;
  39         struct ldb_dn *basedn;
  40         struct ldb_result *r;
  41         struct ldb_message_element *el;
  42         static const char *attrs[] = { "hasMasterNCs", NULL };
  43         uint32_t i;
  44         int ret;
  45
  46         basedn = samdb_ntds_settings_dn(s->samdb);
  47         W_ERROR_HAVE_NO_MEMORY(basedn);
  48
  49         ret = ldb_search(s->samdb, s, &r, basedn, LDB_SCOPE_BASE, attrs,
  50                          "(objectClass=*)");
  51         if (ret != LDB_SUCCESS) {
  52                 return WERR_FOOBAR;
  53         } else if (r->count != 1) {
  54                 talloc_free(r);
  55                 return WERR_FOOBAR;
  56         }
  57
  58         el = ldb_msg_find_element(r->msgs[0], "hasMasterNCs");
  59         if (!el) {
  60                 return WERR_FOOBAR;
  61         }
  62
  63         for (i=0; el && i < el->num_values; i++) {
  64                 const char *v = (const char *)el->values[i].data;
  65                 struct ldb_dn *pdn;
  66                 struct dreplsrv_partition *p;
  67
  68                 pdn = ldb_dn_new(s, s->samdb, v);
  69                 if (!ldb_dn_validate(pdn)) {
  70                         return WERR_FOOBAR;
  71                 }
  72
  73                 p = talloc_zero(s, struct dreplsrv_partition);
  74                 W_ERROR_HAVE_NO_MEMORY(p);
  75
  76                 p->dn = talloc_steal(p, pdn);
  77
  78                 DLIST_ADD(s->partitions, p);
  79
  80                 DEBUG(2, ("dreplsrv_partition[%s] loaded\n", v));
  81         }
  82
  83         talloc_free(r);
  84
  85         status = dreplsrv_refresh_partitions(s);
  86         W_ERROR_NOT_OK_RETURN(status);
  87
  88         return WERR_OK;
  89 }
  90
  91 WERROR dreplsrv_out_connection_attach(struct dreplsrv_service *s,
  92                                       const struct repsFromTo1 *rft,
  93                                       struct dreplsrv_out_connection **_conn)
  94 {
  95         struct dreplsrv_out_connection *cur, *conn = NULL;
  96         const char *hostname;
  97
  98         if (!rft->other_info) {
  99                 return WERR_FOOBAR;
 100         }
 101
 102         if (!rft->other_info->dns_name) {
 103                 return WERR_FOOBAR;
 104         }
 105
 106         hostname = rft->other_info->dns_name;
 107
 108         for (cur = s->connections; cur; cur = cur->next) {
 109                 if (strcmp(cur->binding->host, hostname) == 0) {
 110                         conn = cur;
 111                         break;
 112                 }
 113         }
 114
 115         if (!conn) {
 116                 NTSTATUS nt_status;
 117                 char *binding_str;
 118
 119                 conn = talloc_zero(s, struct dreplsrv_out_connection);
 120                 W_ERROR_HAVE_NO_MEMORY(conn);
 121
 122                 conn->service   = s;
 123
 124                 binding_str = talloc_asprintf(conn, "ncacn_ip_tcp:%s[krb5,seal]",
 125                                               hostname);
 126                 W_ERROR_HAVE_NO_MEMORY(binding_str);
 127                 nt_status = dcerpc_parse_binding(conn, binding_str, &conn->binding);
 128                 talloc_free(binding_str);
 129                 if (!NT_STATUS_IS_OK(nt_status)) {
 130                         return ntstatus_to_werror(nt_status);
 131                 }
 132
 133                 DLIST_ADD_END(s->connections, conn, struct dreplsrv_out_connection *);
 134
 135                 DEBUG(2,("dreplsrv_out_connection_attach(%s): create\n", conn->binding->host));
 136         } else {
 137                 DEBUG(2,("dreplsrv_out_connection_attach(%s): attach\n", conn->binding->host));
 138         }
 139
 140         *_conn = conn;
 141         return WERR_OK;
 142 }
 143
 144 static WERROR dreplsrv_partition_add_source_dsa(struct dreplsrv_service *s,
 145                                                 struct dreplsrv_partition *p,
 146                                                 const struct ldb_val *val)
 147 {
 148         WERROR status;
 149         enum ndr_err_code ndr_err;
 150         struct dreplsrv_partition_source_dsa *source, *s2;
 151
 152         source = talloc_zero(p, struct dreplsrv_partition_source_dsa);
 153         W_ERROR_HAVE_NO_MEMORY(source);
 154
 155         ndr_err = ndr_pull_struct_blob(val, source,
 156                                        lp_iconv_convenience(s->task->lp_ctx), &source->_repsFromBlob,
 157                                        (ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
 158         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 159                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
 160                 talloc_free(source);
 161                 return ntstatus_to_werror(nt_status);
 162         }
 163         /* NDR_PRINT_DEBUG(repsFromToBlob, &source->_repsFromBlob); */
 164         if (source->_repsFromBlob.version != 1) {
 165                 talloc_free(source);
 166                 return WERR_DS_DRA_INTERNAL_ERROR;
 167         }
 168
 169         source->partition       = p;
 170         source->repsFrom1       = &source->_repsFromBlob.ctr.ctr1;
 171
 172         status = dreplsrv_out_connection_attach(s, source->repsFrom1, &source->conn);
 173         W_ERROR_NOT_OK_RETURN(status);
 174
 175         /* remove any existing source with the same GUID */
 176         for (s2=p->sources; s2; s2=s2->next) {
 177                 if (GUID_compare(&s2->repsFrom1->source_dsa_obj_guid,
 178                                  &source->repsFrom1->source_dsa_obj_guid) == 0) {
 179                         talloc_free(s2->repsFrom1->other_info);
 180                         *s2->repsFrom1 = *source->repsFrom1;
 181                         talloc_steal(s2, s2->repsFrom1->other_info);
 182                         talloc_free(source);
 183                         return WERR_OK;
 184                 }
 185         }
 186
 187         DLIST_ADD_END(p->sources, source, struct dreplsrv_partition_source_dsa *);
 188         return WERR_OK;
 189 }
 190
 191 /*
 192   convert from one udv format to the other
 193  */
 194 static WERROR udv_convert(TALLOC_CTX *mem_ctx,
 195                           const struct replUpToDateVectorCtr2 *udv,
 196                           struct drsuapi_DsReplicaCursorCtrEx *udv_ex)
 197 {
 198         int i;
 199
 200         udv_ex->version = 2;
 201         udv_ex->reserved1 = 0;
 202         udv_ex->reserved2 = 0;
 203         udv_ex->count = udv->count;
 204         udv_ex->cursors = talloc_array(mem_ctx, struct drsuapi_DsReplicaCursor, udv->count);
 205         W_ERROR_HAVE_NO_MEMORY(udv_ex->cursors);
 206
 207         for (i=0; i<udv->count; i++) {
 208                 udv_ex->cursors[i].source_dsa_invocation_id = udv->cursors[i].source_dsa_invocation_id;
 209                 udv_ex->cursors[i].highest_usn = udv->cursors[i].highest_usn;
 210         }
 211
 212         return WERR_OK;
 213 }
 214
 215 /*
 216   add our local UDV element for the partition
 217  */
 218 static WERROR add_local_udv(struct dreplsrv_service *s,
 219                             struct dreplsrv_partition *p,
 220                             const struct GUID *our_invocation_id,
 221                             struct drsuapi_DsReplicaCursorCtrEx *udv)
 222 {
 223         int ret;
 224         uint64_t highest_usn;
 225         int i;
 226
 227         ret = dsdb_load_partition_usn(s->samdb, p->dn, &highest_usn);
 228         if (ret != LDB_SUCCESS) {
 229                 /* nothing to add */
 230                 return WERR_OK;
 231         }
 232
 233         for (i=0; i<udv->count; i++) {
 234                 if (GUID_equal(our_invocation_id, &udv->cursors[i].source_dsa_invocation_id)) {
 235                         udv->cursors[i].highest_usn = highest_usn;
 236                         return WERR_OK;
 237                 }
 238         }
 239
 240         udv->cursors = talloc_realloc(p, udv->cursors, struct drsuapi_DsReplicaCursor, udv->count+1);
 241         W_ERROR_HAVE_NO_MEMORY(udv->cursors);
 242
 243         udv->cursors[udv->count].source_dsa_invocation_id = *our_invocation_id;
 244         udv->cursors[udv->count].highest_usn = highest_usn;
 245         udv->count++;
 246
 247         return WERR_OK;
 248 }
 249
 250 static WERROR dreplsrv_refresh_partition(struct dreplsrv_service *s,
 251                                          struct dreplsrv_partition *p)
 252 {
 253         WERROR status;
 254         const struct ldb_val *ouv_value;
 255         struct replUpToDateVectorBlob ouv;
 256         struct dom_sid *nc_sid;
 257         struct ldb_message_element *orf_el = NULL;
 258         struct ldb_result *r;
 259         uint32_t i;
 260         int ret;
 261         TALLOC_CTX *mem_ctx = talloc_new(p);
 262         static const char *attrs[] = {
 263                 "objectSid",
 264                 "objectGUID",
 265                 "replUpToDateVector",
 266                 "repsFrom",
 267                 NULL
 268         };
 269
 270         DEBUG(2, ("dreplsrv_refresh_partition(%s)\n",
 271                 ldb_dn_get_linearized(p->dn)));
 272
 273         ret = ldb_search(s->samdb, mem_ctx, &r, p->dn, LDB_SCOPE_BASE, attrs,
 274                          "(objectClass=*)");
 275         if (ret != LDB_SUCCESS) {
 276                 talloc_free(mem_ctx);
 277                 return WERR_FOOBAR;
 278         } else if (r->count != 1) {
 279                 talloc_free(mem_ctx);
 280                 return WERR_FOOBAR;
 281         }
 282
 283         talloc_free(discard_const(p->nc.dn));
 284         ZERO_STRUCT(p->nc);
 285         p->nc.dn        = ldb_dn_alloc_linearized(p, p->dn);
 286         W_ERROR_HAVE_NO_MEMORY(p->nc.dn);
 287         p->nc.guid      = samdb_result_guid(r->msgs[0], "objectGUID");
 288         nc_sid          = samdb_result_dom_sid(p, r->msgs[0], "objectSid");
 289         if (nc_sid) {
 290                 p->nc.sid       = *nc_sid;
 291                 talloc_free(nc_sid);
 292         }
 293
 294         talloc_free(p->uptodatevector.cursors);
 295         talloc_free(p->uptodatevector_ex.cursors);
 296         ZERO_STRUCT(p->uptodatevector);
 297         ZERO_STRUCT(p->uptodatevector_ex);
 298
 299         ouv_value = ldb_msg_find_ldb_val(r->msgs[0], "replUpToDateVector");
 300         if (ouv_value) {
 301                 enum ndr_err_code ndr_err;
 302                 ndr_err = ndr_pull_struct_blob(ouv_value, mem_ctx,
 303                                                lp_iconv_convenience(s->task->lp_ctx), &ouv,
 304                                                (ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
 305                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 306                         NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
 307                         talloc_free(mem_ctx);
 308                         return ntstatus_to_werror(nt_status);
 309                 }
 310                 /* NDR_PRINT_DEBUG(replUpToDateVectorBlob, &ouv); */
 311                 if (ouv.version != 2) {
 312                         talloc_free(mem_ctx);
 313                         return WERR_DS_DRA_INTERNAL_ERROR;
 314                 }
 315
 316                 p->uptodatevector.count         = ouv.ctr.ctr2.count;
 317                 p->uptodatevector.reserved      = ouv.ctr.ctr2.reserved;
 318                 p->uptodatevector.cursors       = talloc_steal(p, ouv.ctr.ctr2.cursors);
 319
 320                 status = udv_convert(p, &p->uptodatevector, &p->uptodatevector_ex);
 321                 W_ERROR_NOT_OK_RETURN(status);
 322         }
 323
 324         status = add_local_udv(s, p, samdb_ntds_invocation_id(s->samdb), &p->uptodatevector_ex);
 325         W_ERROR_NOT_OK_RETURN(status);
 326
 327         orf_el = ldb_msg_find_element(r->msgs[0], "repsFrom");
 328         if (orf_el) {
 329                 for (i=0; i < orf_el->num_values; i++) {
 330                         status = dreplsrv_partition_add_source_dsa(s, p, &orf_el->values[i]);
 331                         W_ERROR_NOT_OK_RETURN(status);
 332                 }
 333         }
 334
 335         talloc_free(mem_ctx);
 336
 337         return WERR_OK;
 338 }
 339
 340 WERROR dreplsrv_refresh_partitions(struct dreplsrv_service *s)
 341 {
 342         WERROR status;
 343         struct dreplsrv_partition *p;
 344
 345         for (p = s->partitions; p; p = p->next) {
 346                 status = dreplsrv_refresh_partition(s, p);
 347                 W_ERROR_NOT_OK_RETURN(status);
 348         }
 349
 350         return WERR_OK;
 351 }