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 static WERROR dreplsrv_refresh_partitions(struct dreplsrv_service *s);
  37
  38 WERROR dreplsrv_load_partitions(struct dreplsrv_service *s)
  39 {
  40         WERROR status;
  41         struct ldb_dn *basedn;
  42         struct ldb_result *r;
  43         struct ldb_message_element *el;
  44         static const char *attrs[] = { "namingContexts", NULL };
  45         uint32_t i;
  46         int ret;
  47
  48         basedn = ldb_dn_new(s, s->samdb, NULL);
  49         W_ERROR_HAVE_NO_MEMORY(basedn);
  50
  51         ret = ldb_search(s->samdb, basedn, LDB_SCOPE_BASE,
  52                          "(objectClass=*)", attrs, &r);
  53         talloc_free(basedn);
  54         if (ret != LDB_SUCCESS) {
  55                 return WERR_FOOBAR;
  56         } else if (r->count != 1) {
  57                 talloc_free(r);
  58                 return WERR_FOOBAR;
  59         }
  60         talloc_steal(s, r);
  61
  62         el = ldb_msg_find_element(r->msgs[0], "namingContexts");
  63         if (!el) {
  64                 return WERR_FOOBAR;
  65         }
  66
  67         for (i=0; el && i < el->num_values; i++) {
  68                 const char *v = (const char *)el->values[i].data;
  69                 struct ldb_dn *pdn;
  70                 struct dreplsrv_partition *p;
  71
  72                 pdn = ldb_dn_new(s, s->samdb, v);
  73                 if (!ldb_dn_validate(pdn)) {
  74                         return WERR_FOOBAR;
  75                 }
  76
  77                 p = talloc_zero(s, struct dreplsrv_partition);
  78                 W_ERROR_HAVE_NO_MEMORY(p);
  79
  80                 p->dn = talloc_steal(p, pdn);
  81
  82                 DLIST_ADD(s->partitions, p);
  83
  84                 DEBUG(2, ("dreplsrv_partition[%s] loaded\n", v));
  85         }
  86
  87         talloc_free(r);
  88
  89         status = dreplsrv_refresh_partitions(s);
  90         W_ERROR_NOT_OK_RETURN(status);
  91
  92         return WERR_OK;
  93 }
  94
  95 static WERROR dreplsrv_out_connection_attach(struct dreplsrv_service *s,
  96                                              const struct repsFromTo1 *rft,
  97                                              struct dreplsrv_out_connection **_conn)
  98 {
  99         struct dreplsrv_out_connection *cur, *conn = NULL;
 100         const char *hostname;
 101
 102         if (!rft->other_info) {
 103                 return WERR_FOOBAR;
 104         }
 105
 106         if (!rft->other_info->dns_name) {
 107                 return WERR_FOOBAR;
 108         }
 109
 110         hostname = rft->other_info->dns_name;
 111
 112         for (cur = s->connections; cur; cur = cur->next) {
 113                 if (strcmp(cur->binding->host, hostname) == 0) {
 114                         conn = cur;
 115                         break;
 116                 }
 117         }
 118
 119         if (!conn) {
 120                 NTSTATUS nt_status;
 121                 char *binding_str;
 122
 123                 conn = talloc_zero(s, struct dreplsrv_out_connection);
 124                 W_ERROR_HAVE_NO_MEMORY(conn);
 125
 126                 conn->service   = s;
 127
 128                 binding_str = talloc_asprintf(conn, "ncacn_ip_tcp:%s[krb5,seal]",
 129                                               hostname);
 130                 W_ERROR_HAVE_NO_MEMORY(binding_str);
 131                 nt_status = dcerpc_parse_binding(conn, binding_str, &conn->binding);
 132                 talloc_free(binding_str);
 133                 if (!NT_STATUS_IS_OK(nt_status)) {
 134                         return ntstatus_to_werror(nt_status);
 135                 }
 136
 137                 DLIST_ADD_END(s->connections, conn, struct dreplsrv_out_connection *);
 138
 139                 DEBUG(2,("dreplsrv_out_connection_attach(%s): create\n", conn->binding->host));
 140         } else {
 141                 DEBUG(2,("dreplsrv_out_connection_attach(%s): attach\n", conn->binding->host));
 142         }
 143
 144         *_conn = conn;
 145         return WERR_OK;
 146 }
 147
 148 static WERROR dreplsrv_partition_add_source_dsa(struct dreplsrv_service *s,
 149                                                 struct dreplsrv_partition *p,
 150                                                 const struct ldb_val *val)
 151 {
 152         WERROR status;
 153         enum ndr_err_code ndr_err;
 154         struct dreplsrv_partition_source_dsa *source;
 155
 156         source = talloc_zero(p, struct dreplsrv_partition_source_dsa);
 157         W_ERROR_HAVE_NO_MEMORY(source);
 158
 159         ndr_err = ndr_pull_struct_blob(val, source,
 160                                        lp_iconv_convenience(s->task->lp_ctx), &source->_repsFromBlob,
 161                                        (ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
 162         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 163                 NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
 164                 return ntstatus_to_werror(nt_status);
 165         }
 166         /* NDR_PRINT_DEBUG(repsFromToBlob, &source->_repsFromBlob); */
 167         if (source->_repsFromBlob.version != 1) {
 168                 return WERR_DS_DRA_INTERNAL_ERROR;
 169         }
 170
 171         source->partition       = p;
 172         source->repsFrom1       = &source->_repsFromBlob.ctr.ctr1;
 173
 174         status = dreplsrv_out_connection_attach(s, source->repsFrom1, &source->conn);
 175         W_ERROR_NOT_OK_RETURN(status);
 176
 177         DLIST_ADD_END(p->sources, source, struct dreplsrv_partition_source_dsa *);
 178         return WERR_OK;
 179 }
 180
 181 static WERROR dreplsrv_refresh_partition(struct dreplsrv_service *s,
 182                                          struct dreplsrv_partition *p,
 183                                          TALLOC_CTX *mem_ctx)
 184 {
 185         WERROR status;
 186         const struct ldb_val *ouv_value;
 187         struct replUpToDateVectorBlob ouv;
 188         struct dom_sid *nc_sid;
 189         struct ldb_message_element *orf_el = NULL;
 190         struct ldb_result *r;
 191         uint32_t i;
 192         int ret;
 193         static const char *attrs[] = {
 194                 "objectSid",
 195                 "objectGUID",
 196                 "replUpToDateVector",
 197                 "repsFrom",
 198                 NULL
 199         };
 200
 201         DEBUG(2, ("dreplsrv_refresh_partition(%s)\n",
 202                 ldb_dn_get_linearized(p->dn)));
 203
 204         ret = ldb_search(s->samdb, p->dn, LDB_SCOPE_BASE,
 205                          "(objectClass=*)", attrs, &r);
 206         if (ret != LDB_SUCCESS) {
 207                 return WERR_FOOBAR;
 208         } else if (r->count != 1) {
 209                 talloc_free(r);
 210                 return WERR_FOOBAR;
 211         }
 212         talloc_steal(mem_ctx, r);
 213
 214         ZERO_STRUCT(p->nc);
 215         p->nc.dn        = ldb_dn_alloc_linearized(p, p->dn);
 216         W_ERROR_HAVE_NO_MEMORY(p->nc.dn);
 217         p->nc.guid      = samdb_result_guid(r->msgs[0], "objectGUID");
 218         nc_sid          = samdb_result_dom_sid(p, r->msgs[0], "objectSid");
 219         if (nc_sid) {
 220                 p->nc.sid       = *nc_sid;
 221         }
 222
 223         ouv_value = ldb_msg_find_ldb_val(r->msgs[0], "replUpToDateVector");
 224         if (ouv_value) {
 225                 enum ndr_err_code ndr_err;
 226                 ndr_err = ndr_pull_struct_blob(ouv_value, mem_ctx,
 227                                                lp_iconv_convenience(s->task->lp_ctx), &ouv,
 228                                                (ndr_pull_flags_fn_t)ndr_pull_replUpToDateVectorBlob);
 229                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 230                         NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
 231                         return ntstatus_to_werror(nt_status);
 232                 }
 233                 /* NDR_PRINT_DEBUG(replUpToDateVectorBlob, &ouv); */
 234                 if (ouv.version != 2) {
 235                         return WERR_DS_DRA_INTERNAL_ERROR;
 236                 }
 237
 238                 p->uptodatevector.count         = ouv.ctr.ctr2.count;
 239                 p->uptodatevector.reserved      = ouv.ctr.ctr2.reserved;
 240                 p->uptodatevector.cursors       = talloc_steal(p, ouv.ctr.ctr2.cursors);
 241         }
 242
 243         /*
 244          * TODO: add our own uptodatevector cursor
 245          */
 246
 247
 248         orf_el = ldb_msg_find_element(r->msgs[0], "repsFrom");
 249         if (orf_el) {
 250                 for (i=0; i < orf_el->num_values; i++) {
 251                         status = dreplsrv_partition_add_source_dsa(s, p, &orf_el->values[i]);
 252                         W_ERROR_NOT_OK_RETURN(status);
 253                 }
 254         }
 255
 256         talloc_free(r);
 257
 258         return WERR_OK;
 259 }
 260
 261 static WERROR dreplsrv_refresh_partitions(struct dreplsrv_service *s)
 262 {
 263         WERROR status;
 264         struct dreplsrv_partition *p;
 265
 266         for (p = s->partitions; p; p = p->next) {
 267                 status = dreplsrv_refresh_partition(s, p, p);
 268                 W_ERROR_NOT_OK_RETURN(status);
 269         }
 270
 271         return WERR_OK;
 272 }