source3/rpc_server/lsasd.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *
   4  *  LSA service daemon
   5  *
   6  *  Copyright (c) 2011      Andreas Schneider <asn@samba.org>
   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 #include "includes.h"
  23 #include "serverid.h"
  24 #include "messages.h"
  25 #include "ntdomain.h"
  26
  27 #include "../lib/tsocket/tsocket.h"
  28 #include "lib/server_prefork.h"
  29 #include "lib/server_prefork_util.h"
  30 #include "librpc/rpc/dcerpc_ep.h"
  31
  32 #include "rpc_server/rpc_server.h"
  33 #include "rpc_server/rpc_ep_register.h"
  34 #include "rpc_server/rpc_sock_helper.h"
  35
  36 #include "librpc/gen_ndr/srv_lsa.h"
  37 #include "librpc/gen_ndr/srv_samr.h"
  38 #include "librpc/gen_ndr/srv_netlogon.h"
  39
  40 #define DAEMON_NAME "lsasd"
  41 #define LSASD_MAX_SOCKETS 64
  42
  43 static struct prefork_pool *lsasd_pool = NULL;
  44 static int lsasd_child_id = 0;
  45
  46 static struct pf_daemon_config default_pf_lsasd_cfg = {
  47         .prefork_status = PFH_INIT,
  48         .min_children = 5,
  49         .max_children = 25,
  50         .spawn_rate = 5,
  51         .max_allowed_clients = 100,
  52         .child_min_life = 60 /* 1 minute minimum life time */
  53 };
  54 static struct pf_daemon_config pf_lsasd_cfg = { 0 };
  55
  56 void start_lsasd(struct tevent_context *ev_ctx,
  57                  struct messaging_context *msg_ctx);
  58
  59 static void lsasd_reopen_logs(int child_id)
  60 {
  61         char *lfile = lp_logfile();
  62         char *extension;
  63         int rc;
  64
  65         if (child_id) {
  66                 rc = asprintf(&extension, "%s.%d", DAEMON_NAME, child_id);
  67         } else {
  68                 rc = asprintf(&extension, "%s", DAEMON_NAME);
  69         }
  70         if (rc == -1) {
  71                 return;
  72         }
  73
  74         rc = 0;
  75         if (lfile == NULL || lfile[0] == '\0') {
  76                 rc = asprintf(&lfile, "%s/log.%s",
  77                               get_dyn_LOGFILEBASE(), extension);
  78         } else {
  79                 if (strstr(lfile, extension) == NULL) {
  80                         if (child_id) {
  81                                 rc = asprintf(&lfile, "%s.%d",
  82                                                 lp_logfile(),
  83                                                 child_id);
  84                         } else {
  85                                 rc = asprintf(&lfile, "%s.%s",
  86                                                 lp_logfile(),
  87                                                 extension);
  88                         }
  89                 }
  90         }
  91
  92         if (rc > 0) {
  93                 lp_set_logfile(lfile);
  94                 SAFE_FREE(lfile);
  95         }
  96
  97         SAFE_FREE(extension);
  98
  99         reopen_logs();
 100 }
 101
 102 static void lsasd_smb_conf_updated(struct messaging_context *msg,
 103                                   void *private_data,
 104                                   uint32_t msg_type,
 105                                   struct server_id server_id,
 106                                   DATA_BLOB *data)
 107 {
 108         struct tevent_context *ev_ctx;
 109
 110         DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
 111         ev_ctx = talloc_get_type_abort(private_data, struct tevent_context);
 112
 113         change_to_root_user();
 114         lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
 115
 116         lsasd_reopen_logs(lsasd_child_id);
 117         if (lsasd_child_id == 0) {
 118                 pfh_daemon_config(DAEMON_NAME,
 119                                   &pf_lsasd_cfg,
 120                                   &default_pf_lsasd_cfg);
 121                 pfh_manage_pool(ev_ctx, msg, &pf_lsasd_cfg, lsasd_pool);
 122         }
 123 }
 124
 125 static void lsasd_sig_term_handler(struct tevent_context *ev,
 126                                   struct tevent_signal *se,
 127                                   int signum,
 128                                   int count,
 129                                   void *siginfo,
 130                                   void *private_data)
 131 {
 132         rpc_netlogon_shutdown();
 133         rpc_samr_shutdown();
 134         rpc_lsarpc_shutdown();
 135
 136         DEBUG(0, ("termination signal\n"));
 137         exit(0);
 138 }
 139
 140 static void lsasd_setup_sig_term_handler(struct tevent_context *ev_ctx)
 141 {
 142         struct tevent_signal *se;
 143
 144         se = tevent_add_signal(ev_ctx,
 145                                ev_ctx,
 146                                SIGTERM, 0,
 147                                lsasd_sig_term_handler,
 148                                NULL);
 149         if (!se) {
 150                 DEBUG(0, ("failed to setup SIGTERM handler\n"));
 151                 exit(1);
 152         }
 153 }
 154
 155 static void lsasd_sig_hup_handler(struct tevent_context *ev,
 156                                     struct tevent_signal *se,
 157                                     int signum,
 158                                     int count,
 159                                     void *siginfo,
 160                                     void *pvt)
 161 {
 162
 163         change_to_root_user();
 164         lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
 165
 166         lsasd_reopen_logs(lsasd_child_id);
 167         pfh_daemon_config(DAEMON_NAME,
 168                           &pf_lsasd_cfg,
 169                           &default_pf_lsasd_cfg);
 170
 171         /* relay to all children */
 172         prefork_send_signal_to_all(lsasd_pool, SIGHUP);
 173 }
 174
 175 static void lsasd_setup_sig_hup_handler(struct tevent_context *ev_ctx)
 176 {
 177         struct tevent_signal *se;
 178
 179         se = tevent_add_signal(ev_ctx,
 180                                ev_ctx,
 181                                SIGHUP, 0,
 182                                lsasd_sig_hup_handler,
 183                                NULL);
 184         if (!se) {
 185                 DEBUG(0, ("failed to setup SIGHUP handler\n"));
 186                 exit(1);
 187         }
 188 }
 189
 190 /**********************************************************
 191  * Children
 192  **********************************************************/
 193
 194 struct lsasd_chld_sig_hup_ctx {
 195         struct messaging_context *msg_ctx;
 196         struct pf_worker_data *pf;
 197 };
 198
 199 static void lsasd_chld_sig_hup_handler(struct tevent_context *ev,
 200                                          struct tevent_signal *se,
 201                                          int signum,
 202                                          int count,
 203                                          void *siginfo,
 204                                          void *pvt)
 205 {
 206         struct pf_worker_data *pf = (struct pf_worker_data *)pvt;
 207
 208         /* avoid wasting CPU cycles if we are going to exit soon anyways */
 209         if (pf->cmds == PF_SRV_MSG_EXIT) {
 210                 return;
 211         }
 212
 213         change_to_root_user();
 214         lsasd_reopen_logs(lsasd_child_id);
 215 }
 216
 217 static bool lsasd_setup_chld_hup_handler(struct tevent_context *ev_ctx,
 218                                          struct pf_worker_data *pf)
 219 {
 220         struct tevent_signal *se;
 221
 222         se = tevent_add_signal(ev_ctx,
 223                                ev_ctx,
 224                                SIGHUP, 0,
 225                                lsasd_chld_sig_hup_handler,
 226                                pf);
 227         if (!se) {
 228                 DEBUG(1, ("failed to setup SIGHUP handler"));
 229                 return false;
 230         }
 231
 232         return true;
 233 }
 234
 235 static bool lsasd_child_init(struct tevent_context *ev_ctx,
 236                              int child_id,
 237                              struct pf_worker_data *pf)
 238 {
 239         NTSTATUS status;
 240         struct messaging_context *msg_ctx = server_messaging_context();
 241         bool ok;
 242
 243         status = reinit_after_fork(msg_ctx, ev_ctx,
 244                                    procid_self(), true);
 245         if (!NT_STATUS_IS_OK(status)) {
 246                 DEBUG(0,("reinit_after_fork() failed\n"));
 247                 smb_panic("reinit_after_fork() failed");
 248         }
 249
 250         lsasd_child_id = child_id;
 251         lsasd_reopen_logs(child_id);
 252
 253         ok = lsasd_setup_chld_hup_handler(ev_ctx, pf);
 254         if (!ok) {
 255                 return false;
 256         }
 257
 258         if (!serverid_register(procid_self(), FLAG_MSG_GENERAL)) {
 259                 return false;
 260         }
 261
 262         messaging_register(msg_ctx, ev_ctx,
 263                            MSG_SMB_CONF_UPDATED, lsasd_smb_conf_updated);
 264
 265         status = rpc_lsarpc_init(NULL);
 266         if (!NT_STATUS_IS_OK(status)) {
 267                 DEBUG(0, ("Failed to register lsarpc rpc inteface! (%s)\n",
 268                           nt_errstr(status)));
 269                 return false;
 270         }
 271
 272         status = rpc_samr_init(NULL);
 273         if (!NT_STATUS_IS_OK(status)) {
 274                 DEBUG(0, ("Failed to register samr rpc inteface! (%s)\n",
 275                           nt_errstr(status)));
 276                 return false;
 277         }
 278
 279         status = rpc_netlogon_init(NULL);
 280         if (!NT_STATUS_IS_OK(status)) {
 281                 DEBUG(0, ("Failed to register netlogon rpc inteface! (%s)\n",
 282                           nt_errstr(status)));
 283                 return false;
 284         }
 285
 286         return true;
 287 }
 288
 289 struct lsasd_children_data {
 290         struct tevent_context *ev_ctx;
 291         struct messaging_context *msg_ctx;
 292         struct pf_worker_data *pf;
 293         int listen_fd_size;
 294         int *listen_fds;
 295
 296         bool listening;
 297 };
 298
 299 static void lsasd_next_client(void *pvt);
 300
 301 static int lsasd_children_main(struct tevent_context *ev_ctx,
 302                                struct messaging_context *msg_ctx,
 303                                struct pf_worker_data *pf,
 304                                int child_id,
 305                                int listen_fd_size,
 306                                int *listen_fds,
 307                                void *private_data)
 308 {
 309         struct lsasd_children_data *data;
 310         bool ok;
 311         int ret;
 312
 313         ok = lsasd_child_init(ev_ctx, child_id, pf);
 314         if (!ok) {
 315                 return 1;
 316         }
 317
 318         data = talloc(ev_ctx, struct lsasd_children_data);
 319         if (!data) {
 320                 return 1;
 321         }
 322         data->pf = pf;
 323         data->ev_ctx = ev_ctx;
 324         data->msg_ctx = msg_ctx;
 325         data->listen_fd_size = listen_fd_size;
 326         data->listen_fds = listen_fds;
 327         data->listening = false;
 328
 329         /* loop until it is time to exit */
 330         while (pf->status != PF_WORKER_EXITING) {
 331                 /* try to see if it is time to schedule the next client */
 332                 lsasd_next_client(data);
 333
 334                 ret = tevent_loop_once(ev_ctx);
 335                 if (ret != 0) {
 336                         DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
 337                                   ret, strerror(errno)));
 338                         pf->status = PF_WORKER_EXITING;
 339                 }
 340         }
 341
 342         return ret;
 343 }
 344
 345 static void lsasd_client_terminated(void *pvt)
 346 {
 347         struct lsasd_children_data *data;
 348
 349         data = talloc_get_type_abort(pvt, struct lsasd_children_data);
 350
 351         if (data->pf->num_clients) {
 352                 data->pf->num_clients--;
 353         } else {
 354                 DEBUG(2, ("Invalid num clients, aborting!\n"));
 355                 data->pf->status = PF_WORKER_EXITING;
 356                 return;
 357         }
 358
 359         lsasd_next_client(pvt);
 360 }
 361
 362 struct lsasd_new_client {
 363         struct lsasd_children_data *data;
 364 };
 365
 366 static void lsasd_handle_client(struct tevent_req *req);
 367
 368 static void lsasd_next_client(void *pvt)
 369 {
 370         struct tevent_req *req;
 371         struct lsasd_children_data *data;
 372         struct lsasd_new_client *next;
 373
 374         data = talloc_get_type_abort(pvt, struct lsasd_children_data);
 375
 376         if (data->pf->num_clients == 0) {
 377                 data->pf->status = PF_WORKER_IDLE;
 378         }
 379
 380         if (data->pf->cmds == PF_SRV_MSG_EXIT) {
 381                 DEBUG(2, ("Parent process commands we terminate!\n"));
 382                 return;
 383         }
 384
 385         if (data->listening ||
 386             data->pf->num_clients >= data->pf->allowed_clients) {
 387                 /* nothing to do for now we are already listening
 388                  * or reached the number of clients we are allowed
 389                  * to handle in parallel */
 390                 return;
 391         }
 392
 393         next = talloc_zero(data, struct lsasd_new_client);
 394         if (!next) {
 395                 DEBUG(1, ("Out of memory!?\n"));
 396                 return;
 397         }
 398         next->data = data;
 399
 400         req = prefork_listen_send(next,
 401                                   data->ev_ctx,
 402                                   data->pf,
 403                                   data->listen_fd_size,
 404                                   data->listen_fds);
 405         if (!req) {
 406                 DEBUG(1, ("Failed to make listening request!?\n"));
 407                 talloc_free(next);
 408                 return;
 409         }
 410         tevent_req_set_callback(req, lsasd_handle_client, next);
 411
 412         data->listening = true;
 413 }
 414
 415 static void lsasd_handle_client(struct tevent_req *req)
 416 {
 417         struct lsasd_children_data *data;
 418         struct lsasd_new_client *client;
 419         int rc;
 420         int sd;
 421         TALLOC_CTX *tmp_ctx;
 422         struct tsocket_address *srv_addr;
 423         struct tsocket_address *cli_addr;
 424
 425         client = tevent_req_callback_data(req, struct lsasd_new_client);
 426         data = client->data;
 427
 428         tmp_ctx = talloc_stackframe();
 429         if (tmp_ctx == NULL) {
 430                 DEBUG(1, ("Failed to allocate stackframe!\n"));
 431                 return;
 432         }
 433
 434         rc = prefork_listen_recv(req,
 435                                  tmp_ctx,
 436                                  &sd,
 437                                  &srv_addr,
 438                                  &cli_addr);
 439
 440         /* this will free the request too */
 441         talloc_free(client);
 442         /* we are done listening */
 443         data->listening = false;
 444
 445         if (rc != 0) {
 446                 DEBUG(6, ("No client connection was available after all!\n"));
 447                 goto done;
 448         }
 449
 450         DEBUG(2, ("LSASD preforked child %d got client connection!\n",
 451                   (int)(data->pf->pid)));
 452
 453         if (tsocket_address_is_inet(srv_addr, "ip")) {
 454                 DEBUG(3, ("Got a tcpip client connection from %s on inteface %s\n",
 455                            tsocket_address_string(cli_addr, tmp_ctx),
 456                            tsocket_address_string(srv_addr, tmp_ctx)));
 457
 458                 dcerpc_ncacn_accept(data->ev_ctx,
 459                                     data->msg_ctx,
 460                                     NCACN_IP_TCP,
 461                                     "IP",
 462                                     cli_addr,
 463                                     srv_addr,
 464                                     sd,
 465                                     NULL);
 466         } else if (tsocket_address_is_unix(srv_addr)) {
 467                 char *p;
 468
 469                 p = tsocket_address_unix_path(srv_addr, tmp_ctx);
 470                 if (p == NULL) {
 471                         talloc_free(tmp_ctx);
 472                         return;
 473                 }
 474
 475                 if (strstr(p, "/np/")) {
 476                         p = basename(p);
 477
 478                         named_pipe_accept_function(data->ev_ctx,
 479                                                    data->msg_ctx,
 480                                                    p,
 481                                                    sd,
 482                                                    lsasd_client_terminated,
 483                                                    data);
 484                 } else {
 485                         p = basename(p);
 486
 487                         dcerpc_ncacn_accept(data->ev_ctx,
 488                                             data->msg_ctx,
 489                                             NCALRPC,
 490                                             p,
 491                                             cli_addr,
 492                                             srv_addr,
 493                                             sd,
 494                                             NULL);
 495                 }
 496         } else {
 497                 DEBUG(0, ("ERROR: Unsupported socket!\n"));
 498         }
 499
 500 done:
 501         talloc_free(tmp_ctx);
 502 }
 503
 504 /*
 505  * MAIN
 506  */
 507
 508 static bool lsasd_schedule_check(struct tevent_context *ev_ctx,
 509                                  struct messaging_context *msg_ctx,
 510                                  struct timeval current_time);
 511
 512 static void lsasd_check_children(struct tevent_context *ev_ctx,
 513                                     struct tevent_timer *te,
 514                                     struct timeval current_time,
 515                                     void *pvt);
 516
 517 static void lsasd_sigchld_handler(struct tevent_context *ev_ctx,
 518                                   struct prefork_pool *pfp,
 519                                   void *pvt)
 520 {
 521         struct messaging_context *msg_ctx;
 522
 523         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 524
 525         /* run pool management so we can fork/retire or increase
 526          * the allowed connections per child based on load */
 527         pfh_manage_pool(ev_ctx, msg_ctx, &pf_lsasd_cfg, lsasd_pool);
 528 }
 529
 530 static bool lsasd_setup_children_monitor(struct tevent_context *ev_ctx,
 531                                          struct messaging_context *msg_ctx)
 532 {
 533         bool ok;
 534
 535         /* add our oun sigchld callback */
 536         prefork_set_sigchld_callback(lsasd_pool, lsasd_sigchld_handler, msg_ctx);
 537
 538         ok = lsasd_schedule_check(ev_ctx, msg_ctx, tevent_timeval_current());
 539
 540         return ok;
 541 }
 542
 543 static bool lsasd_schedule_check(struct tevent_context *ev_ctx,
 544                                  struct messaging_context *msg_ctx,
 545                                  struct timeval current_time)
 546 {
 547         struct tevent_timer *te;
 548         struct timeval next_event;
 549
 550         /* check situation again in 10 seconds */
 551         next_event = tevent_timeval_current_ofs(10, 0);
 552
 553         /* TODO: check when the socket becomes readable, so that children
 554          * are checked only when there is some activity ? */
 555         te = tevent_add_timer(ev_ctx, lsasd_pool, next_event,
 556                               lsasd_check_children, msg_ctx);
 557         if (!te) {
 558                 DEBUG(2, ("Failed to set up children monitoring!\n"));
 559                 return false;
 560         }
 561
 562         return true;
 563 }
 564
 565 static void lsasd_check_children(struct tevent_context *ev_ctx,
 566                                  struct tevent_timer *te,
 567                                  struct timeval current_time,
 568                                  void *pvt)
 569 {
 570         struct messaging_context *msg_ctx;
 571
 572         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 573
 574         pfh_manage_pool(ev_ctx, msg_ctx, &pf_lsasd_cfg, lsasd_pool);
 575
 576         lsasd_schedule_check(ev_ctx, msg_ctx, current_time);
 577 }
 578
 579 /*
 580  * start it up
 581  */
 582
 583 static bool lsasd_create_sockets(struct tevent_context *ev_ctx,
 584                                  struct messaging_context *msg_ctx,
 585                                  int *listen_fd,
 586                                  int *listen_fd_size)
 587 {
 588         struct dcerpc_binding_vector *v, *v_orig;
 589         TALLOC_CTX *tmp_ctx;
 590         NTSTATUS status;
 591         uint32_t i;
 592         int fd;
 593         int rc;
 594         bool ok = true;
 595
 596         tmp_ctx = talloc_stackframe();
 597         if (tmp_ctx == NULL) {
 598                 return false;
 599         }
 600
 601         status = dcerpc_binding_vector_new(tmp_ctx, &v_orig);
 602         if (!NT_STATUS_IS_OK(status)) {
 603                 ok = false;
 604                 goto done;
 605         }
 606
 607         /* Create only one tcpip listener for all services */
 608         status = rpc_create_tcpip_sockets(&ndr_table_lsarpc,
 609                                           v_orig,
 610                                           0,
 611                                           listen_fd,
 612                                           listen_fd_size);
 613         if (!NT_STATUS_IS_OK(status)) {
 614                 ok = false;
 615                 goto done;
 616         }
 617
 618         /* Start to listen on tcpip sockets */
 619         for (i = 0; i < *listen_fd_size; i++) {
 620                 rc = listen(listen_fd[i], pf_lsasd_cfg.max_allowed_clients);
 621                 if (rc == -1) {
 622                         DEBUG(0, ("Failed to listen on tcpip socket - %s\n",
 623                                   strerror(errno)));
 624                         ok = false;
 625                         goto done;
 626                 }
 627         }
 628
 629         /* LSARPC */
 630         fd = create_named_pipe_socket("lsarpc");
 631         if (fd < 0) {
 632                 ok = false;
 633                 goto done;
 634         }
 635         listen_fd[*listen_fd_size] = fd;
 636         (*listen_fd_size)++;
 637
 638         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 639         if (rc == -1) {
 640                 DEBUG(0, ("Failed to listen on lsarpc pipe - %s\n",
 641                           strerror(errno)));
 642                 ok = false;
 643                 goto done;
 644         }
 645
 646         v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
 647         if (v == NULL) {
 648                 ok = false;
 649                 goto done;
 650         }
 651
 652         status = dcerpc_binding_vector_replace_iface(&ndr_table_lsarpc, v);
 653         if (!NT_STATUS_IS_OK(status)) {
 654                 return false;
 655         }
 656
 657         status = dcerpc_binding_vector_add_np_default(&ndr_table_lsarpc, v);
 658         if (!NT_STATUS_IS_OK(status)) {
 659                 ok = false;
 660                 goto done;
 661         }
 662
 663         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_lsarpc, v);
 664         if (!NT_STATUS_IS_OK(status)) {
 665                 ok = false;
 666                 goto done;
 667         }
 668
 669         /* SAMR */
 670         fd = create_named_pipe_socket("samr");
 671         if (fd < 0) {
 672                 ok = false;
 673                 goto done;
 674         }
 675
 676         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 677         if (rc == -1) {
 678                 DEBUG(0, ("Failed to listen on samr pipe - %s\n",
 679                           strerror(errno)));
 680                 ok = false;
 681                 goto done;
 682         }
 683         listen_fd[*listen_fd_size] = fd;
 684         (*listen_fd_size)++;
 685
 686         v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
 687         if (v == NULL) {
 688                 ok = false;
 689                 goto done;
 690         }
 691
 692         status = dcerpc_binding_vector_replace_iface(&ndr_table_samr, v);
 693         if (!NT_STATUS_IS_OK(status)) {
 694                 return false;
 695         }
 696
 697         status = dcerpc_binding_vector_add_np_default(&ndr_table_samr, v);
 698         if (!NT_STATUS_IS_OK(status)) {
 699                 ok = false;
 700                 goto done;
 701         }
 702
 703         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_samr, v);
 704         if (!NT_STATUS_IS_OK(status)) {
 705                 ok = false;
 706                 goto done;
 707         }
 708
 709         /* NETLOGON */
 710         fd = create_named_pipe_socket("netlogon");
 711         if (fd < 0) {
 712                 ok = false;
 713                 goto done;
 714         }
 715
 716         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 717         if (rc == -1) {
 718                 DEBUG(0, ("Failed to listen on samr pipe - %s\n",
 719                           strerror(errno)));
 720                 ok = false;
 721                 goto done;
 722         }
 723         listen_fd[*listen_fd_size] = fd;
 724         (*listen_fd_size)++;
 725
 726         v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
 727         if (v == NULL) {
 728                 ok = false;
 729                 goto done;
 730         }
 731
 732         status = dcerpc_binding_vector_replace_iface(&ndr_table_netlogon, v);
 733         if (!NT_STATUS_IS_OK(status)) {
 734                 return false;
 735         }
 736
 737         status = dcerpc_binding_vector_add_np_default(&ndr_table_netlogon, v);
 738         if (!NT_STATUS_IS_OK(status)) {
 739                 ok = false;
 740                 goto done;
 741         }
 742
 743         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_netlogon, v);
 744         if (!NT_STATUS_IS_OK(status)) {
 745                 ok = false;
 746                 goto done;
 747         }
 748
 749 done:
 750         talloc_free(tmp_ctx);
 751         return ok;
 752 }
 753
 754 void start_lsasd(struct tevent_context *ev_ctx,
 755                  struct messaging_context *msg_ctx)
 756 {
 757         NTSTATUS status;
 758         int listen_fd[LSASD_MAX_SOCKETS];
 759         int listen_fd_size = 0;
 760         pid_t pid;
 761         int rc;
 762         bool ok;
 763
 764         DEBUG(1, ("Forking LSA Service Daemon\n"));
 765
 766         /*
 767          * Block signals before forking child as it will have to
 768          * set its own handlers. Child will re-enable SIGHUP as
 769          * soon as the handlers are set up.
 770          */
 771         BlockSignals(true, SIGTERM);
 772         BlockSignals(true, SIGHUP);
 773
 774         pid = sys_fork();
 775         if (pid == -1) {
 776                 DEBUG(0, ("Failed to fork LSASD [%s], aborting ...\n",
 777                            strerror(errno)));
 778                 exit(1);
 779         }
 780
 781         /* parent or error */
 782         if (pid != 0) {
 783
 784                 /* Re-enable SIGHUP before returnig */
 785                 BlockSignals(false, SIGTERM);
 786                 BlockSignals(false, SIGHUP);
 787
 788                 return;
 789         }
 790
 791         /* child */
 792         close_low_fds(false);
 793
 794         status = reinit_after_fork(msg_ctx,
 795                                    ev_ctx,
 796                                    procid_self(), true);
 797         if (!NT_STATUS_IS_OK(status)) {
 798                 DEBUG(0,("reinit_after_fork() failed\n"));
 799                 smb_panic("reinit_after_fork() failed");
 800         }
 801
 802         lsasd_reopen_logs(0);
 803         pfh_daemon_config(DAEMON_NAME,
 804                           &pf_lsasd_cfg,
 805                           &default_pf_lsasd_cfg);
 806
 807         lsasd_setup_sig_term_handler(ev_ctx);
 808         lsasd_setup_sig_hup_handler(ev_ctx);
 809
 810         BlockSignals(false, SIGTERM);
 811         BlockSignals(false, SIGHUP);
 812
 813         ok = lsasd_create_sockets(ev_ctx, msg_ctx, listen_fd, &listen_fd_size);
 814         if (!ok) {
 815                 exit(1);
 816         }
 817
 818         /* start children before any more initialization is done */
 819         ok = prefork_create_pool(ev_ctx, /* mem_ctx */
 820                                  ev_ctx,
 821                                  msg_ctx,
 822                                  listen_fd_size,
 823                                  listen_fd,
 824                                  pf_lsasd_cfg.min_children,
 825                                  pf_lsasd_cfg.max_children,
 826                                  &lsasd_children_main,
 827                                  NULL,
 828                                  &lsasd_pool);
 829         if (!ok) {
 830                 exit(1);
 831         }
 832
 833         if (!serverid_register(procid_self(), FLAG_MSG_GENERAL)) {
 834                 exit(1);
 835         }
 836
 837         messaging_register(msg_ctx,
 838                            ev_ctx,
 839                            MSG_SMB_CONF_UPDATED,
 840                            lsasd_smb_conf_updated);
 841
 842         status = rpc_lsarpc_init(NULL);
 843         if (!NT_STATUS_IS_OK(status)) {
 844                 DEBUG(0, ("Failed to register winreg rpc inteface! (%s)\n",
 845                           nt_errstr(status)));
 846                 exit(1);
 847         }
 848
 849         status = rpc_samr_init(NULL);
 850         if (!NT_STATUS_IS_OK(status)) {
 851                 DEBUG(0, ("Failed to register lsasd rpc inteface! (%s)\n",
 852                           nt_errstr(status)));
 853                 exit(1);
 854         }
 855
 856         status = rpc_netlogon_init(NULL);
 857         if (!NT_STATUS_IS_OK(status)) {
 858                 DEBUG(0, ("Failed to register lsasd rpc inteface! (%s)\n",
 859                           nt_errstr(status)));
 860                 exit(1);
 861         }
 862
 863         ok = lsasd_setup_children_monitor(ev_ctx, msg_ctx);
 864         if (!ok) {
 865                 DEBUG(0, ("Failed to setup children monitoring!\n"));
 866                 exit(1);
 867         }
 868
 869         DEBUG(1, ("LSASD Daemon Started (%d)\n", getpid()));
 870
 871         /* loop forever */
 872         rc = tevent_loop_wait(ev_ctx);
 873
 874         /* should not be reached */
 875         DEBUG(0,("lsasd: tevent_loop_wait() exited with %d - %s\n",
 876                  rc, (rc == 0) ? "out of events" : strerror(errno)));
 877         exit(1);
 878 }