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