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[] = { "namingContexts", NULL };
  43         uint32_t i;
  44         int ret;
  45
  46         basedn = ldb_dn_new(s, s->samdb, NULL);
  47         W_ERROR_HAVE_NO_MEMORY(basedn);
  48
  49         ret = ldb_search(s->samdb, s, &r, basedn, LDB_SCOPE_BASE, attrs,
  50                          "(objectClass=*)");
  51         talloc_free(basedn);
  52         if (ret != LDB_SUCCESS) {
  53                 return WERR_FOOBAR;
  54         } else if (r->count != 1) {
  55                 talloc_free(r);
  56                 return WERR_FOOBAR;
  57         }
  58
  59         el = ldb_msg_find_element(r->msgs[0], "namingContexts");
  60         if (!el) {
  61                 return WERR_FOOBAR;
  62         }
  63
  64         for (i=0; el && i < el->num_values; i++) {
  65                 const char *v = (const char *)el->values[i].data;
  66                 struct ldb_dn *pdn;
  67                 struct dreplsrv_partition *p;
  68
  69                 pdn = ldb_dn_new(s, s->samdb, v);
  70                 if (!ldb_dn_validate(pdn)) {
  71                         return WERR_FOOBAR;
  72                 }
  73
  74                 p = talloc_zero(s, struct dreplsrv_partition);
  75                 W_ERROR_HAVE_NO_MEMORY(p);
  76
  77                 p->dn = talloc_steal(p, pdn);
  78
  79                 DLIST_ADD(s->partitions, p);
  80
  81                 DEBUG(2, ("dreplsrv_partition[%s] loaded\n", v));
  82         }
  83
  84         talloc_free(r);
  85
  86         status = dreplsrv_refresh_partitions(s);
  87         W_ERROR_NOT_OK_RETURN(status);
  88
  89         return WERR_OK;
  90 }
  91
  92 static WERROR dreplsrv_out_connection_attach(struct dreplsrv_service *s,
  93                                              const struct repsFromTo1 *rft,
  94                                              struct dreplsrv_out_connection **_conn)
  95 {
  96         struct dreplsrv_out_connection *cur, *conn = NULL;
  97         const char *hostname;
  98
  99         if (!rft->other_info) {
 100                 return WERR_FOOBAR;
 101         }
 102
 103         if (!rft->other_info->dns_name) {
 104                 return WERR_FOOBAR;
 105         }
 106
 107         hostname = rft->other_info->dns_name;
 108
 109         for (cur = s->connections; cur; cur = cur->next) {
 110                 if (strcmp(cur->binding->host, hostname) == 0) {
 111                         conn = cur;
 112                         break;
 113                 }
 114         }
 115
 116         if (!conn) {
 117                 NTSTATUS nt_status;
 118                 char *binding_str;
 119
 120                 conn = talloc_zero(s, struct dreplsrv_out_connection);
 121                 W_ERROR_HAVE_NO_MEMORY(conn);
 122
 123                 conn->service   = s;
 124
 125                 binding_str = talloc_asprintf(conn, "ncacn_ip_tcp:%s[krb5,seal]",
 126                                               hostname);
 127                 W_ERROR_HAVE_NO_MEMORY(binding_str);
 128                 nt_status = dcerpc_parse_binding(conn, binding_str, &conn->binding);
 129                 talloc_free(binding_str);
 130                 if (!NT_STATUS_IS_OK(nt_status)) {
 131                         return ntstatus_to_werror(nt_status);
 132                 }
 133
 134                 DLIST_ADD_END(s->connections, conn, struct dreplsrv_out_connection *);
 135
 136                 DEBUG(2,("dreplsrv_out_connection_attach(%s): create\n", conn->binding->host));
 137         } else {
 138                 DEBUG(2,("dreplsrv_out_connection_attach(%s): attach\n", conn->binding->host));
 139         }
 140
 141         *_conn = conn;
 142         return WERR_OK;
 143 }
 144
 145 static WERROR dreplsrv_partition_add_source_dsa(struct dreplsrv_service *s,
 146                                                 struct dreplsrv_partition *p,
 147                                                 const struct ldb_val *val)
 148 {
 149         WERROR status;
 150         enum ndr_err_code ndr_err;
 151         struct dreplsrv_partition_source_dsa *source, *s2;
 152
 153         source = talloc_zero(p, struct dreplsrv_partition_source_dsa);
 154         W_ERROR_HAVE_NO_MEMORY(source);
 155
 156         ndr_err = ndr_pull_struct_blob(val, source,
 157                                        lp_iconv_convenience(s->task->lp_ctx), &source->_repsFromBlob,
 158                                        (ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
 159         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 160                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
 161                 talloc_free(source);
 162                 return ntstatus_to_werror(nt_status);
 163         }
 164         /* NDR_PRINT_DEBUG(repsFromToBlob, &source->_repsFromBlob); */
 165         if (source->_repsFromBlob.version != 1) {
 166                 talloc_free(source);
 167                 return WERR_DS_DRA_INTERNAL_ERROR;
 168         }
 169
 170         source->partition       = p;
 171         source->repsFrom1       = &source->_repsFromBlob.ctr.ctr1;
 172
 173         status = dreplsrv_out_connection_attach(s, source->repsFrom1, &source->conn);
 174         W_ERROR_NOT_OK_RETURN(status);
 175
 176         /* remove any existing source with the same GUID */
 177         for (s2=p->sources; s2; s2=s2->next) {
 178                 if (GUID_compare(&s2->repsFrom1->source_dsa_obj_guid,
 179                                  &source->repsFrom1->source_dsa_obj_guid) == 0) {
 180                         talloc_free(s2->repsFrom1->other_info);
 181                         *s2->repsFrom1 = *source->repsFrom1;
 182                         talloc_steal(s2, s2->repsFrom1->other_info);
 183                         talloc_free(source);
 184                         return WERR_OK;
 185                 }
 186         }
 187
 188         DLIST_ADD_END(p->sources, source, struct dreplsrv_partition_source_dsa *);
 189         return WERR_OK;
 190 }
 191
 192 static WERROR dreplsrv_refresh_partition(struct dreplsrv_service *s,
 193                                          struct dreplsrv_partition *p)
 194 {
 195         WERROR status;
 196         const struct ldb_val *ouv_value;
 197         struct replUpToDateVectorBlob ouv;
 198         struct dom_sid *nc_sid;
 199         struct ldb_message_element *orf_el = NULL;
 200         struct ldb_result *r;
 201         uint32_t i;
 202         int ret;
 203         TALLOC_CTX *mem_ctx = talloc_new(p);
 204         static const char *attrs[] = {
 205                 "objectSid",
 206                 "objectGUID",
 207                 "replUpToDateVector",
 208                 "repsFrom",
 209                 NULL
 210         };
 211
 212         DEBUG(2, ("dreplsrv_refresh_partition(%s)\n",
 213                 ldb_dn_get_linearized(p->dn)));
 214
 215         ret = ldb_search(s->samdb, mem_ctx, &r, p->dn, LDB_SCOPE_BASE, attrs,
 216                          "(objectClass=*)");
 217         if (ret != LDB_SUCCESS) {
 218                 talloc_free(mem_ctx);
 219                 return WERR_FOOBAR;
 220         } else if (r->count != 1) {
 221                 talloc_free(mem_ctx);
 222                 return WERR_FOOBAR;
 223         }
 224
 225         talloc_free(discard_const(p->nc.dn));
 226         ZERO_STRUCT(p->nc);
 227         p->nc.dn        = ldb_dn_alloc_linearized(p, p->dn);
 228         W_ERROR_HAVE_NO_MEMORY(p->nc.dn);
 229         p->nc.guid      = samdb_result_guid(r->msgs[0], "objectGUID");
 230         nc_sid          = samdb_result_dom_sid(p, r->msgs[0], "objectSid");
 231         if (nc_sid) {
 232                 p->nc.sid       = *nc_sid;
 233                 talloc_free(nc_sid);
 234         }
 235
 236         ouv_value = ldb_msg_find_ldb_val(r->msgs[0], "replUpToDateVector");
 237         if (ouv_value) {
 238                 enum ndr_err_code ndr_err;
 239                 ndr_err = ndr_pull_struct_blob(ouv_value, mem_ctx,
 240                                                lp_iconv_convenience(s->task->lp_ctx), &ouv,
 241                                                (ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
 242                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 243                         NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
 244                         talloc_free(mem_ctx);
 245                         return ntstatus_to_werror(nt_status);
 246                 }
 247                 /* NDR_PRINT_DEBUG(replUpToDateVectorBlob, &ouv); */
 248                 if (ouv.version != 2) {
 249                         talloc_free(mem_ctx);
 250                         return WERR_DS_DRA_INTERNAL_ERROR;
 251                 }
 252
 253                 p->uptodatevector.count         = ouv.ctr.ctr2.count;
 254                 p->uptodatevector.reserved      = ouv.ctr.ctr2.reserved;
 255                 talloc_free(p->uptodatevector.cursors);
 256                 p->uptodatevector.cursors       = talloc_steal(p, ouv.ctr.ctr2.cursors);
 257         }
 258
 259         /*
 260          * TODO: add our own uptodatevector cursor
 261          */
 262
 263
 264         orf_el = ldb_msg_find_element(r->msgs[0], "repsFrom");
 265         if (orf_el) {
 266                 for (i=0; i < orf_el->num_values; i++) {
 267                         status = dreplsrv_partition_add_source_dsa(s, p, &orf_el->values[i]);
 268                         W_ERROR_NOT_OK_RETURN(status);
 269                 }
 270         }
 271
 272         talloc_free(mem_ctx);
 273
 274         return WERR_OK;
 275 }
 276
 277 WERROR dreplsrv_refresh_partitions(struct dreplsrv_service *s)
 278 {
 279         WERROR status;
 280         struct dreplsrv_partition *p;
 281
 282         for (p = s->partitions; p; p = p->next) {
 283                 status = dreplsrv_refresh_partition(s, p);
 284                 W_ERROR_NOT_OK_RETURN(status);
 285         }
 286
 287         return WERR_OK;
 288 }