source4/dsdb/dns/dns_update.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3
   4    DNS update service
   5
   6    Copyright (C) Andrew Tridgell 2009
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 */
  22
  23 /*
  24   this module auto-creates the named.conf.update file, which tells
  25   bind9 what KRB5 principals it should accept for updates to our zone
  26
  27   It also uses the samba_dnsupdate script to auto-create the right DNS
  28   names for ourselves as a DC in the domain, using TSIG-GSS
  29  */
  30
  31 #include "includes.h"
  32 #include "dsdb/samdb/samdb.h"
  33 #include "auth/auth.h"
  34 #include "smbd/service.h"
  35 #include "lib/messaging/irpc.h"
  36 #include "param/param.h"
  37 #include "system/filesys.h"
  38 #include "libcli/composite/composite.h"
  39 #include "libcli/security/dom_sid.h"
  40 #include "librpc/gen_ndr/ndr_irpc.h"
  41
  42 struct dnsupdate_service {
  43         struct task_server *task;
  44         struct auth_session_info *system_session_info;
  45         struct ldb_context *samdb;
  46
  47         /* status for periodic config file update */
  48         struct {
  49                 uint32_t interval;
  50                 struct tevent_timer *te;
  51                 struct tevent_req *subreq;
  52                 NTSTATUS status;
  53         } confupdate;
  54
  55         /* status for periodic DNS name check */
  56         struct {
  57                 uint32_t interval;
  58                 struct tevent_timer *te;
  59                 struct tevent_req *subreq;
  60                 struct tevent_req *spnreq;
  61                 NTSTATUS status;
  62         } nameupdate;
  63 };
  64
  65 /*
  66   called when rndc reload has finished
  67  */
  68 static void dnsupdate_rndc_done(struct tevent_req *subreq)
  69 {
  70         struct dnsupdate_service *service = tevent_req_callback_data(subreq,
  71                                             struct dnsupdate_service);
  72         int ret;
  73         int sys_errno;
  74
  75         service->confupdate.subreq = NULL;
  76
  77         ret = samba_runcmd_recv(subreq, &sys_errno);
  78         TALLOC_FREE(subreq);
  79         if (ret != 0) {
  80                 service->confupdate.status = map_nt_error_from_unix(sys_errno);
  81         } else {
  82                 service->confupdate.status = NT_STATUS_OK;
  83         }
  84
  85         if (!NT_STATUS_IS_OK(service->confupdate.status)) {
  86                 DEBUG(0,(__location__ ": Failed rndc update - %s\n",
  87                          nt_errstr(service->confupdate.status)));
  88         } else {
  89                 DEBUG(3,("Completed rndc reload OK\n"));
  90         }
  91 }
  92
  93 /*
  94   called every 'dnsupdate:conf interval' seconds
  95  */
  96 static void dnsupdate_rebuild(struct dnsupdate_service *service)
  97 {
  98         int ret;
  99         size_t size;
 100         struct ldb_result *res;
 101         const char *tmp_path, *path, *path_static;
 102         char *static_policies;
 103         int fd;
 104         unsigned int i;
 105         const char *attrs[] = { "sAMAccountName", NULL };
 106         const char *realm = lpcfg_realm(service->task->lp_ctx);
 107         TALLOC_CTX *tmp_ctx = talloc_new(service);
 108         const char * const *rndc_command = lpcfg_rndc_command(service->task->lp_ctx);
 109
 110         /* abort any pending script run */
 111         TALLOC_FREE(service->confupdate.subreq);
 112
 113         ret = ldb_search(service->samdb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 114                          attrs, "(&(primaryGroupID=%u)(objectClass=computer))",
 115                          DOMAIN_RID_DCS);
 116         if (ret != LDB_SUCCESS) {
 117                 DEBUG(0,(__location__ ": Unable to find DCs list - %s", ldb_errstring(service->samdb)));
 118                 talloc_free(tmp_ctx);
 119                 return;
 120         }
 121
 122         path = lpcfg_parm_string(service->task->lp_ctx, NULL, "dnsupdate", "path");
 123         if (path == NULL) {
 124                 path = private_path(tmp_ctx, service->task->lp_ctx, "named.conf.update");
 125         }
 126
 127         path_static = lpcfg_parm_string(service->task->lp_ctx, NULL, "dnsupdate", "extra_static_grant_rules");
 128         if (path_static == NULL) {
 129                 path_static = private_path(tmp_ctx, service->task->lp_ctx, "named.conf.update.static");
 130         }
 131
 132         tmp_path = talloc_asprintf(tmp_ctx, "%s.tmp", path);
 133         if (path == NULL || tmp_path == NULL || path_static == NULL ) {
 134                 DEBUG(0,(__location__ ": Unable to get paths\n"));
 135                 talloc_free(tmp_ctx);
 136                 return;
 137         }
 138
 139         static_policies = file_load(path_static, &size, 0, tmp_ctx);
 140
 141         unlink(tmp_path);
 142         fd = open(tmp_path, O_CREAT|O_TRUNC|O_WRONLY, 0444);
 143         if (fd == -1) {
 144                 DEBUG(1,(__location__ ": Unable to open %s - %s\n", tmp_path, strerror(errno)));
 145                 talloc_free(tmp_ctx);
 146                 return;
 147         }
 148
 149         dprintf(fd, "/* this file is auto-generated - do not edit */\n");
 150         dprintf(fd, "update-policy {\n");
 151         if( static_policies != NULL ) {
 152                 dprintf(fd, "/* Start of static entries */\n");
 153                 dprintf(fd, "%s\n",static_policies);
 154                 dprintf(fd, "/* End of static entries */\n");
 155         }
 156         dprintf(fd, "\tgrant %s ms-self * A AAAA;\n", realm);
 157         dprintf(fd, "\tgrant administrator@%s wildcard * A AAAA SRV CNAME TXT;\n", realm);
 158
 159         for (i=0; i<res->count; i++) {
 160                 const char *acctname;
 161                 acctname = ldb_msg_find_attr_as_string(res->msgs[i],
 162                                                        "sAMAccountName", NULL);
 163                 if (!acctname) continue;
 164                 dprintf(fd, "\tgrant %s@%s wildcard * A AAAA SRV CNAME;\n",
 165                         acctname, realm);
 166         }
 167         dprintf(fd, "};\n");
 168         close(fd);
 169
 170
 171         if (NT_STATUS_IS_OK(service->confupdate.status) &&
 172             file_compare(tmp_path, path) == true) {
 173                 unlink(tmp_path);
 174                 talloc_free(tmp_ctx);
 175                 return;
 176         }
 177
 178         if (rename(tmp_path, path) != 0) {
 179                 DEBUG(0,(__location__ ": Failed to rename %s to %s - %s\n",
 180                          tmp_path, path, strerror(errno)));
 181                 talloc_free(tmp_ctx);
 182                 return;
 183         }
 184
 185         DEBUG(2,("Loading new DNS update grant rules\n"));
 186         service->confupdate.subreq = samba_runcmd_send(service,
 187                                                        service->task->event_ctx,
 188                                                        timeval_current_ofs(10, 0),
 189                                                        2, 0,
 190                                                        rndc_command,
 191                                                        "reload", NULL);
 192         if (service->confupdate.subreq == NULL) {
 193                 DEBUG(0,(__location__ ": samba_runcmd_send() failed with no memory\n"));
 194                 talloc_free(tmp_ctx);
 195                 return;
 196         }
 197         tevent_req_set_callback(service->confupdate.subreq,
 198                                 dnsupdate_rndc_done,
 199                                 service);
 200
 201         talloc_free(tmp_ctx);
 202 }
 203
 204 static NTSTATUS dnsupdate_confupdate_schedule(struct dnsupdate_service *service);
 205
 206 /*
 207   called every 'dnsupdate:conf interval' seconds
 208  */
 209 static void dnsupdate_confupdate_handler_te(struct tevent_context *ev, struct tevent_timer *te,
 210                                           struct timeval t, void *ptr)
 211 {
 212         struct dnsupdate_service *service = talloc_get_type(ptr, struct dnsupdate_service);
 213
 214         dnsupdate_rebuild(service);
 215         dnsupdate_confupdate_schedule(service);
 216 }
 217
 218
 219 static NTSTATUS dnsupdate_confupdate_schedule(struct dnsupdate_service *service)
 220 {
 221         service->confupdate.te = tevent_add_timer(service->task->event_ctx, service,
 222                                                 timeval_current_ofs(service->confupdate.interval, 0),
 223                                                 dnsupdate_confupdate_handler_te, service);
 224         NT_STATUS_HAVE_NO_MEMORY(service->confupdate.te);
 225         return NT_STATUS_OK;
 226 }
 227
 228
 229 /*
 230   called when dns update script has finished
 231  */
 232 static void dnsupdate_nameupdate_done(struct tevent_req *subreq)
 233 {
 234         struct dnsupdate_service *service = tevent_req_callback_data(subreq,
 235                                             struct dnsupdate_service);
 236         int ret;
 237         int sys_errno;
 238
 239         service->nameupdate.subreq = NULL;
 240
 241         ret = samba_runcmd_recv(subreq, &sys_errno);
 242         TALLOC_FREE(subreq);
 243         if (ret != 0) {
 244                 service->nameupdate.status = map_nt_error_from_unix(sys_errno);
 245         } else {
 246                 service->nameupdate.status = NT_STATUS_OK;
 247         }
 248
 249         if (!NT_STATUS_IS_OK(service->nameupdate.status)) {
 250                 DEBUG(0,(__location__ ": Failed DNS update - %s\n",
 251                          nt_errstr(service->nameupdate.status)));
 252         } else {
 253                 DEBUG(3,("Completed DNS update check OK\n"));
 254         }
 255 }
 256
 257
 258 /*
 259   called when spn update script has finished
 260  */
 261 static void dnsupdate_spnupdate_done(struct tevent_req *subreq)
 262 {
 263         struct dnsupdate_service *service = tevent_req_callback_data(subreq,
 264                                             struct dnsupdate_service);
 265         int ret;
 266         int sys_errno;
 267
 268         service->nameupdate.spnreq = NULL;
 269
 270         ret = samba_runcmd_recv(subreq, &sys_errno);
 271         TALLOC_FREE(subreq);
 272         if (ret != 0) {
 273                 service->nameupdate.status = map_nt_error_from_unix(sys_errno);
 274         } else {
 275                 service->nameupdate.status = NT_STATUS_OK;
 276         }
 277
 278         if (!NT_STATUS_IS_OK(service->nameupdate.status)) {
 279                 DEBUG(0,(__location__ ": Failed SPN update - %s\n",
 280                          nt_errstr(service->nameupdate.status)));
 281         } else {
 282                 DEBUG(3,("Completed SPN update check OK\n"));
 283         }
 284 }
 285
 286 /*
 287   called every 'dnsupdate:name interval' seconds
 288  */
 289 static void dnsupdate_check_names(struct dnsupdate_service *service)
 290 {
 291         const char * const *dns_update_command = lpcfg_dns_update_command(service->task->lp_ctx);
 292         const char * const *spn_update_command = lpcfg_spn_update_command(service->task->lp_ctx);
 293
 294         /* kill any existing child */
 295         TALLOC_FREE(service->nameupdate.subreq);
 296
 297         DEBUG(3,("Calling DNS name update script\n"));
 298         service->nameupdate.subreq = samba_runcmd_send(service,
 299                                                        service->task->event_ctx,
 300                                                        timeval_current_ofs(10, 0),
 301                                                        2, 0,
 302                                                        dns_update_command,
 303                                                        NULL);
 304         if (service->nameupdate.subreq == NULL) {
 305                 DEBUG(0,(__location__ ": samba_runcmd_send() failed with no memory\n"));
 306                 return;
 307         }
 308         tevent_req_set_callback(service->nameupdate.subreq,
 309                                 dnsupdate_nameupdate_done,
 310                                 service);
 311
 312         DEBUG(3,("Calling SPN name update script\n"));
 313         service->nameupdate.spnreq = samba_runcmd_send(service,
 314                                                        service->task->event_ctx,
 315                                                        timeval_current_ofs(10, 0),
 316                                                        2, 0,
 317                                                        spn_update_command,
 318                                                        NULL);
 319         if (service->nameupdate.spnreq == NULL) {
 320                 DEBUG(0,(__location__ ": samba_runcmd_send() failed with no memory\n"));
 321                 return;
 322         }
 323         tevent_req_set_callback(service->nameupdate.spnreq,
 324                                 dnsupdate_spnupdate_done,
 325                                 service);
 326 }
 327
 328 static NTSTATUS dnsupdate_nameupdate_schedule(struct dnsupdate_service *service);
 329
 330 /*
 331   called every 'dnsupdate:name interval' seconds
 332  */
 333 static void dnsupdate_nameupdate_handler_te(struct tevent_context *ev, struct tevent_timer *te,
 334                                             struct timeval t, void *ptr)
 335 {
 336         struct dnsupdate_service *service = talloc_get_type(ptr, struct dnsupdate_service);
 337
 338         dnsupdate_check_names(service);
 339         dnsupdate_nameupdate_schedule(service);
 340 }
 341
 342
 343 static NTSTATUS dnsupdate_nameupdate_schedule(struct dnsupdate_service *service)
 344 {
 345         service->nameupdate.te = tevent_add_timer(service->task->event_ctx, service,
 346                                                   timeval_current_ofs(service->nameupdate.interval, 0),
 347                                                   dnsupdate_nameupdate_handler_te, service);
 348         NT_STATUS_HAVE_NO_MEMORY(service->nameupdate.te);
 349         return NT_STATUS_OK;
 350 }
 351
 352
 353 struct dnsupdate_RODC_state {
 354         struct irpc_message *msg;
 355         struct dnsupdate_RODC *r;
 356         char *tmp_path;
 357         int fd;
 358 };
 359
 360 static int dnsupdate_RODC_destructor(struct dnsupdate_RODC_state *st)
 361 {
 362         if (st->fd != -1) {
 363                 close(st->fd);
 364         }
 365         unlink(st->tmp_path);
 366         return 0;
 367 }
 368
 369 /*
 370   called when the DNS update has completed
 371  */
 372 static void dnsupdate_RODC_callback(struct tevent_req *req)
 373 {
 374         struct dnsupdate_RODC_state *st =
 375                 tevent_req_callback_data(req,
 376                                          struct dnsupdate_RODC_state);
 377         int sys_errno;
 378         int i, ret;
 379
 380         ret = samba_runcmd_recv(req, &sys_errno);
 381         talloc_free(req);
 382         if (ret != 0) {
 383                 st->r->out.result = map_nt_error_from_unix(sys_errno);
 384                 DEBUG(2,(__location__ ": RODC DNS Update failed: %s\n", nt_errstr(st->r->out.result)));
 385         } else {
 386                 st->r->out.result = NT_STATUS_OK;
 387                 DEBUG(3,(__location__ ": RODC DNS Update OK\n"));
 388         }
 389
 390         for (i=0; i<st->r->in.dns_names->count; i++) {
 391                 st->r->out.dns_names->names[i].status = NT_STATUS_V(st->r->out.result);
 392         }
 393
 394         irpc_send_reply(st->msg, NT_STATUS_OK);
 395 }
 396
 397
 398 /**
 399  * Called when we get a RODC DNS update request from the netlogon
 400  * rpc server
 401  */
 402 static NTSTATUS dnsupdate_dnsupdate_RODC(struct irpc_message *msg,
 403                                          struct dnsupdate_RODC *r)
 404 {
 405         struct dnsupdate_service *s = talloc_get_type(msg->private_data,
 406                                                       struct dnsupdate_service);
 407         const char * const *dns_update_command = lpcfg_dns_update_command(s->task->lp_ctx);
 408         struct dnsupdate_RODC_state *st;
 409         struct tevent_req *req;
 410         int i, ret;
 411         struct GUID ntds_guid;
 412         const char *site, *dnsdomain, *dnsforest, *ntdsguid, *hostname;
 413         struct ldb_dn *sid_dn;
 414         const char *attrs[] = { "dNSHostName", NULL };
 415         struct ldb_result *res;
 416
 417         st = talloc_zero(msg, struct dnsupdate_RODC_state);
 418         if (!st) {
 419                 r->out.result = NT_STATUS_NO_MEMORY;
 420                 return NT_STATUS_OK;
 421         }
 422
 423         st->r = r;
 424         st->msg = msg;
 425
 426         st->tmp_path = smbd_tmp_path(st, s->task->lp_ctx, "rodcdns.XXXXXX");
 427         if (!st->tmp_path) {
 428                 talloc_free(st);
 429                 r->out.result = NT_STATUS_NO_MEMORY;
 430                 return NT_STATUS_OK;
 431         }
 432
 433         st->fd = mkstemp(st->tmp_path);
 434         if (st->fd == -1) {
 435                 DEBUG(0,("Unable to create a temporary file for RODC dnsupdate\n"));
 436                 talloc_free(st);
 437                 r->out.result = NT_STATUS_INTERNAL_DB_CORRUPTION;
 438                 return NT_STATUS_OK;
 439         }
 440
 441         talloc_set_destructor(st, dnsupdate_RODC_destructor);
 442
 443         sid_dn = ldb_dn_new_fmt(st, s->samdb, "<SID=%s>", dom_sid_string(st, r->in.dom_sid));
 444         if (!sid_dn) {
 445                 talloc_free(st);
 446                 r->out.result = NT_STATUS_NO_MEMORY;
 447                 return NT_STATUS_OK;
 448         }
 449
 450         /* work out the site */
 451         ret = samdb_find_site_for_computer(s->samdb, st, sid_dn, &site);
 452         if (ret != LDB_SUCCESS) {
 453                 DEBUG(2, (__location__ ": Unable to find site for computer %s\n",
 454                           ldb_dn_get_linearized(sid_dn)));
 455                 talloc_free(st);
 456                 r->out.result = NT_STATUS_NO_SUCH_USER;
 457                 return NT_STATUS_OK;
 458         }
 459
 460         /* work out the ntdsguid */
 461         ret = samdb_find_ntdsguid_for_computer(s->samdb, sid_dn, &ntds_guid);
 462         ntdsguid = GUID_string(st, &ntds_guid);
 463         if (ret != LDB_SUCCESS || !ntdsguid) {
 464                 DEBUG(2, (__location__ ": Unable to find NTDS GUID for computer %s\n",
 465                           ldb_dn_get_linearized(sid_dn)));
 466                 talloc_free(st);
 467                 r->out.result = NT_STATUS_NO_SUCH_USER;
 468                 return NT_STATUS_OK;
 469         }
 470
 471
 472         /* find dnsdomain and dnsforest */
 473         dnsdomain = lpcfg_realm(s->task->lp_ctx);
 474         dnsforest = dnsdomain;
 475
 476         /* find the hostname */
 477         ret = dsdb_search_dn(s->samdb, st, &res, sid_dn, attrs, 0);
 478         if (ret == LDB_SUCCESS) {
 479                 hostname = ldb_msg_find_attr_as_string(res->msgs[0], "dNSHostName", NULL);
 480         }
 481         if (ret != LDB_SUCCESS || !hostname) {
 482                 DEBUG(2, (__location__ ": Unable to find NTDS GUID for computer %s\n",
 483                           ldb_dn_get_linearized(sid_dn)));
 484                 talloc_free(st);
 485                 r->out.result = NT_STATUS_NO_SUCH_USER;
 486                 return NT_STATUS_OK;
 487         }
 488
 489
 490         for (i=0; i<st->r->in.dns_names->count; i++) {
 491                 struct NL_DNS_NAME_INFO *n = &r->in.dns_names->names[i];
 492                 switch (n->type) {
 493                 case NlDnsLdapAtSite:
 494                         dprintf(st->fd, "SRV _ldap._tcp.%s._sites.%s. %s %u\n",
 495                                 site, dnsdomain, hostname, n->port);
 496                         break;
 497                 case NlDnsGcAtSite:
 498                         dprintf(st->fd, "SRV _ldap._tcp.%s._sites.gc._msdcs.%s. %s %u\n",
 499                                 site, dnsdomain, hostname, n->port);
 500                         break;
 501                 case NlDnsDsaCname:
 502                         dprintf(st->fd, "CNAME %s._msdcs.%s. %s\n",
 503                                 ntdsguid, dnsforest, hostname);
 504                         break;
 505                 case NlDnsKdcAtSite:
 506                         dprintf(st->fd, "SRV _kerberos._tcp.%s._sites.dc._msdcs.%s. %s %u\n",
 507                                 site, dnsdomain, hostname, n->port);
 508                         break;
 509                 case NlDnsDcAtSite:
 510                         dprintf(st->fd, "SRV _ldap._tcp.%s._sites.dc._msdcs.%s. %s %u\n",
 511                                 site, dnsdomain, hostname, n->port);
 512                         break;
 513                 case NlDnsRfc1510KdcAtSite:
 514                         dprintf(st->fd, "SRV _kerberos._tcp.%s._sites.%s. %s %u\n",
 515                                 site, dnsdomain, hostname, n->port);
 516                         break;
 517                 case NlDnsGenericGcAtSite:
 518                         dprintf(st->fd, "SRV _gc._tcp.%s._sites.%s. %s %u\n",
 519                                 site, dnsforest, hostname, n->port);
 520                         break;
 521                 }
 522         }
 523
 524         close(st->fd);
 525         st->fd = -1;
 526
 527         DEBUG(3,("Calling RODC DNS name update script %s\n", st->tmp_path));
 528         req = samba_runcmd_send(st,
 529                                 s->task->event_ctx,
 530                                 timeval_current_ofs(20, 0),
 531                                 2, 0,
 532                                 dns_update_command,
 533                                 "--update-list",
 534                                 st->tmp_path,
 535                                 NULL);
 536         NT_STATUS_HAVE_NO_MEMORY(req);
 537
 538         /* setup the callback */
 539         tevent_req_set_callback(req, dnsupdate_RODC_callback, st);
 540
 541         msg->defer_reply = true;
 542
 543         return NT_STATUS_OK;
 544 }
 545
 546 /*
 547   startup the dns update task
 548 */
 549 static void dnsupdate_task_init(struct task_server *task)
 550 {
 551         NTSTATUS status;
 552         struct dnsupdate_service *service;
 553
 554         if (lpcfg_server_role(task->lp_ctx) != ROLE_DOMAIN_CONTROLLER) {
 555                 /* not useful for non-DC */
 556                 return;
 557         }
 558
 559         task_server_set_title(task, "task[dnsupdate]");
 560
 561         service = talloc_zero(task, struct dnsupdate_service);
 562         if (!service) {
 563                 task_server_terminate(task, "dnsupdate_task_init: out of memory", true);
 564                 return;
 565         }
 566         service->task           = task;
 567         task->private_data      = service;
 568
 569         service->system_session_info = system_session(service->task->lp_ctx);
 570         if (!service->system_session_info) {
 571                 task_server_terminate(task,
 572                                       "dnsupdate: Failed to obtain server credentials\n",
 573                                       true);
 574                 return;
 575         }
 576
 577         service->samdb = samdb_connect(service, service->task->event_ctx, task->lp_ctx,
 578                                        service->system_session_info, 0);
 579         if (!service->samdb) {
 580                 task_server_terminate(task, "dnsupdate: Failed to connect to local samdb\n",
 581                                       true);
 582                 return;
 583         }
 584
 585         service->confupdate.interval    = lpcfg_parm_int(task->lp_ctx, NULL,
 586                                                       "dnsupdate", "config interval", 60); /* in seconds */
 587
 588         service->nameupdate.interval    = lpcfg_parm_int(task->lp_ctx, NULL,
 589                                                       "dnsupdate", "name interval", 600); /* in seconds */
 590
 591         dnsupdate_rebuild(service);
 592         status = dnsupdate_confupdate_schedule(service);
 593         if (!NT_STATUS_IS_OK(status)) {
 594                 task_server_terminate(task, talloc_asprintf(task,
 595                                       "dnsupdate: Failed to confupdate schedule: %s\n",
 596                                                             nt_errstr(status)), true);
 597                 return;
 598         }
 599
 600         dnsupdate_check_names(service);
 601         status = dnsupdate_nameupdate_schedule(service);
 602         if (!NT_STATUS_IS_OK(status)) {
 603                 task_server_terminate(task, talloc_asprintf(task,
 604                                       "dnsupdate: Failed to nameupdate schedule: %s\n",
 605                                                             nt_errstr(status)), true);
 606                 return;
 607         }
 608
 609         irpc_add_name(task->msg_ctx, "dnsupdate");
 610
 611         IRPC_REGISTER(task->msg_ctx, irpc, DNSUPDATE_RODC,
 612                       dnsupdate_dnsupdate_RODC, service);
 613
 614         /* create the intial file */
 615         dnsupdate_rebuild(service);
 616
 617 }
 618
 619 /*
 620   register ourselves as a available server
 621 */
 622 NTSTATUS server_service_dnsupdate_init(void)
 623 {
 624         return register_server_service("dnsupdate", dnsupdate_task_init);
 625 }