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
 297 static void lsasd_next_client(void *pvt);
 298
 299 static int lsasd_children_main(struct tevent_context *ev_ctx,
 300                                struct messaging_context *msg_ctx,
 301                                struct pf_worker_data *pf,
 302                                int child_id,
 303                                int listen_fd_size,
 304                                int *listen_fds,
 305                                void *private_data)
 306 {
 307         struct lsasd_children_data *data;
 308         bool ok;
 309         int ret;
 310
 311         ok = lsasd_child_init(ev_ctx, child_id, pf);
 312         if (!ok) {
 313                 return 1;
 314         }
 315
 316         data = talloc(ev_ctx, struct lsasd_children_data);
 317         if (!data) {
 318                 return 1;
 319         }
 320         data->pf = pf;
 321         data->ev_ctx = ev_ctx;
 322         data->msg_ctx = msg_ctx;
 323         data->listen_fd_size = listen_fd_size;
 324         data->listen_fds = listen_fds;
 325
 326         /* loop until it is time to exit */
 327         while (pf->status != PF_WORKER_EXITING) {
 328                 /* try to see if it is time to schedule the next client */
 329                 lsasd_next_client(data);
 330
 331                 ret = tevent_loop_once(ev_ctx);
 332                 if (ret != 0) {
 333                         DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
 334                                   ret, strerror(errno)));
 335                         pf->status = PF_WORKER_EXITING;
 336                 }
 337         }
 338
 339         return ret;
 340 }
 341
 342 static void lsasd_client_terminated(void *pvt)
 343 {
 344         struct lsasd_children_data *data;
 345
 346         data = talloc_get_type_abort(pvt, struct lsasd_children_data);
 347
 348         pfh_client_terminated(data->pf);
 349
 350         lsasd_next_client(pvt);
 351 }
 352
 353 struct lsasd_new_client {
 354         struct lsasd_children_data *data;
 355 };
 356
 357 static void lsasd_handle_client(struct tevent_req *req);
 358
 359 static void lsasd_next_client(void *pvt)
 360 {
 361         struct tevent_req *req;
 362         struct lsasd_children_data *data;
 363         struct lsasd_new_client *next;
 364
 365         data = talloc_get_type_abort(pvt, struct lsasd_children_data);
 366
 367         if (!pfh_child_allowed_to_accept(data->pf)) {
 368                 /* nothing to do for now we are already listening
 369                  * or we are not allowed to listen further */
 370                 return;
 371         }
 372
 373         next = talloc_zero(data, struct lsasd_new_client);
 374         if (!next) {
 375                 DEBUG(1, ("Out of memory!?\n"));
 376                 return;
 377         }
 378         next->data = data;
 379
 380         req = prefork_listen_send(next,
 381                                   data->ev_ctx,
 382                                   data->pf,
 383                                   data->listen_fd_size,
 384                                   data->listen_fds);
 385         if (!req) {
 386                 DEBUG(1, ("Failed to make listening request!?\n"));
 387                 talloc_free(next);
 388                 return;
 389         }
 390         tevent_req_set_callback(req, lsasd_handle_client, next);
 391 }
 392
 393 static void lsasd_handle_client(struct tevent_req *req)
 394 {
 395         struct lsasd_children_data *data;
 396         struct lsasd_new_client *client;
 397         int rc;
 398         int sd;
 399         TALLOC_CTX *tmp_ctx;
 400         struct tsocket_address *srv_addr;
 401         struct tsocket_address *cli_addr;
 402
 403         client = tevent_req_callback_data(req, struct lsasd_new_client);
 404         data = client->data;
 405
 406         tmp_ctx = talloc_stackframe();
 407         if (tmp_ctx == NULL) {
 408                 DEBUG(1, ("Failed to allocate stackframe!\n"));
 409                 return;
 410         }
 411
 412         rc = prefork_listen_recv(req,
 413                                  tmp_ctx,
 414                                  &sd,
 415                                  &srv_addr,
 416                                  &cli_addr);
 417
 418         /* this will free the request too */
 419         talloc_free(client);
 420
 421         if (rc != 0) {
 422                 DEBUG(6, ("No client connection was available after all!\n"));
 423                 goto done;
 424         }
 425
 426         DEBUG(2, ("LSASD preforked child %d got client connection!\n",
 427                   (int)(data->pf->pid)));
 428
 429         if (tsocket_address_is_inet(srv_addr, "ip")) {
 430                 DEBUG(3, ("Got a tcpip client connection from %s on inteface %s\n",
 431                            tsocket_address_string(cli_addr, tmp_ctx),
 432                            tsocket_address_string(srv_addr, tmp_ctx)));
 433
 434                 dcerpc_ncacn_accept(data->ev_ctx,
 435                                     data->msg_ctx,
 436                                     NCACN_IP_TCP,
 437                                     "IP",
 438                                     cli_addr,
 439                                     srv_addr,
 440                                     sd,
 441                                     NULL);
 442         } else if (tsocket_address_is_unix(srv_addr)) {
 443                 char *p;
 444
 445                 p = tsocket_address_unix_path(srv_addr, tmp_ctx);
 446                 if (p == NULL) {
 447                         talloc_free(tmp_ctx);
 448                         return;
 449                 }
 450
 451                 if (strstr(p, "/np/")) {
 452                         p = basename(p);
 453
 454                         named_pipe_accept_function(data->ev_ctx,
 455                                                    data->msg_ctx,
 456                                                    p,
 457                                                    sd,
 458                                                    lsasd_client_terminated,
 459                                                    data);
 460                 } else {
 461                         p = basename(p);
 462
 463                         dcerpc_ncacn_accept(data->ev_ctx,
 464                                             data->msg_ctx,
 465                                             NCALRPC,
 466                                             p,
 467                                             cli_addr,
 468                                             srv_addr,
 469                                             sd,
 470                                             NULL);
 471                 }
 472         } else {
 473                 DEBUG(0, ("ERROR: Unsupported socket!\n"));
 474         }
 475
 476 done:
 477         talloc_free(tmp_ctx);
 478 }
 479
 480 /*
 481  * MAIN
 482  */
 483
 484 static bool lsasd_schedule_check(struct tevent_context *ev_ctx,
 485                                  struct messaging_context *msg_ctx,
 486                                  struct timeval current_time);
 487
 488 static void lsasd_check_children(struct tevent_context *ev_ctx,
 489                                     struct tevent_timer *te,
 490                                     struct timeval current_time,
 491                                     void *pvt);
 492
 493 static void lsasd_sigchld_handler(struct tevent_context *ev_ctx,
 494                                   struct prefork_pool *pfp,
 495                                   void *pvt)
 496 {
 497         struct messaging_context *msg_ctx;
 498
 499         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 500
 501         /* run pool management so we can fork/retire or increase
 502          * the allowed connections per child based on load */
 503         pfh_manage_pool(ev_ctx, msg_ctx, &pf_lsasd_cfg, lsasd_pool);
 504 }
 505
 506 static bool lsasd_setup_children_monitor(struct tevent_context *ev_ctx,
 507                                          struct messaging_context *msg_ctx)
 508 {
 509         bool ok;
 510
 511         /* add our oun sigchld callback */
 512         prefork_set_sigchld_callback(lsasd_pool, lsasd_sigchld_handler, msg_ctx);
 513
 514         ok = lsasd_schedule_check(ev_ctx, msg_ctx, tevent_timeval_current());
 515
 516         return ok;
 517 }
 518
 519 static bool lsasd_schedule_check(struct tevent_context *ev_ctx,
 520                                  struct messaging_context *msg_ctx,
 521                                  struct timeval current_time)
 522 {
 523         struct tevent_timer *te;
 524         struct timeval next_event;
 525
 526         /* check situation again in 10 seconds */
 527         next_event = tevent_timeval_current_ofs(10, 0);
 528
 529         /* TODO: check when the socket becomes readable, so that children
 530          * are checked only when there is some activity ? */
 531         te = tevent_add_timer(ev_ctx, lsasd_pool, next_event,
 532                               lsasd_check_children, msg_ctx);
 533         if (!te) {
 534                 DEBUG(2, ("Failed to set up children monitoring!\n"));
 535                 return false;
 536         }
 537
 538         return true;
 539 }
 540
 541 static void lsasd_check_children(struct tevent_context *ev_ctx,
 542                                  struct tevent_timer *te,
 543                                  struct timeval current_time,
 544                                  void *pvt)
 545 {
 546         struct messaging_context *msg_ctx;
 547
 548         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 549
 550         pfh_manage_pool(ev_ctx, msg_ctx, &pf_lsasd_cfg, lsasd_pool);
 551
 552         lsasd_schedule_check(ev_ctx, msg_ctx, current_time);
 553 }
 554
 555 /*
 556  * start it up
 557  */
 558
 559 static bool lsasd_create_sockets(struct tevent_context *ev_ctx,
 560                                  struct messaging_context *msg_ctx,
 561                                  int *listen_fd,
 562                                  int *listen_fd_size)
 563 {
 564         struct dcerpc_binding_vector *v, *v_orig;
 565         TALLOC_CTX *tmp_ctx;
 566         NTSTATUS status;
 567         uint32_t i;
 568         int fd;
 569         int rc;
 570         bool ok = true;
 571
 572         tmp_ctx = talloc_stackframe();
 573         if (tmp_ctx == NULL) {
 574                 return false;
 575         }
 576
 577         status = dcerpc_binding_vector_new(tmp_ctx, &v_orig);
 578         if (!NT_STATUS_IS_OK(status)) {
 579                 ok = false;
 580                 goto done;
 581         }
 582
 583         /* Create only one tcpip listener for all services */
 584         status = rpc_create_tcpip_sockets(&ndr_table_lsarpc,
 585                                           v_orig,
 586                                           0,
 587                                           listen_fd,
 588                                           listen_fd_size);
 589         if (!NT_STATUS_IS_OK(status)) {
 590                 ok = false;
 591                 goto done;
 592         }
 593
 594         /* Start to listen on tcpip sockets */
 595         for (i = 0; i < *listen_fd_size; i++) {
 596                 rc = listen(listen_fd[i], pf_lsasd_cfg.max_allowed_clients);
 597                 if (rc == -1) {
 598                         DEBUG(0, ("Failed to listen on tcpip socket - %s\n",
 599                                   strerror(errno)));
 600                         ok = false;
 601                         goto done;
 602                 }
 603         }
 604
 605         /* LSARPC */
 606         fd = create_named_pipe_socket("lsarpc");
 607         if (fd < 0) {
 608                 ok = false;
 609                 goto done;
 610         }
 611         listen_fd[*listen_fd_size] = fd;
 612         (*listen_fd_size)++;
 613
 614         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 615         if (rc == -1) {
 616                 DEBUG(0, ("Failed to listen on lsarpc pipe - %s\n",
 617                           strerror(errno)));
 618                 ok = false;
 619                 goto done;
 620         }
 621
 622         v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
 623         if (v == NULL) {
 624                 ok = false;
 625                 goto done;
 626         }
 627
 628         status = dcerpc_binding_vector_replace_iface(&ndr_table_lsarpc, v);
 629         if (!NT_STATUS_IS_OK(status)) {
 630                 return false;
 631         }
 632
 633         status = dcerpc_binding_vector_add_np_default(&ndr_table_lsarpc, v);
 634         if (!NT_STATUS_IS_OK(status)) {
 635                 ok = false;
 636                 goto done;
 637         }
 638
 639         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_lsarpc, v);
 640         if (!NT_STATUS_IS_OK(status)) {
 641                 ok = false;
 642                 goto done;
 643         }
 644
 645         /* SAMR */
 646         fd = create_named_pipe_socket("samr");
 647         if (fd < 0) {
 648                 ok = false;
 649                 goto done;
 650         }
 651
 652         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 653         if (rc == -1) {
 654                 DEBUG(0, ("Failed to listen on samr pipe - %s\n",
 655                           strerror(errno)));
 656                 ok = false;
 657                 goto done;
 658         }
 659         listen_fd[*listen_fd_size] = fd;
 660         (*listen_fd_size)++;
 661
 662         v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
 663         if (v == NULL) {
 664                 ok = false;
 665                 goto done;
 666         }
 667
 668         status = dcerpc_binding_vector_replace_iface(&ndr_table_samr, v);
 669         if (!NT_STATUS_IS_OK(status)) {
 670                 return false;
 671         }
 672
 673         status = dcerpc_binding_vector_add_np_default(&ndr_table_samr, v);
 674         if (!NT_STATUS_IS_OK(status)) {
 675                 ok = false;
 676                 goto done;
 677         }
 678
 679         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_samr, v);
 680         if (!NT_STATUS_IS_OK(status)) {
 681                 ok = false;
 682                 goto done;
 683         }
 684
 685         /* NETLOGON */
 686         fd = create_named_pipe_socket("netlogon");
 687         if (fd < 0) {
 688                 ok = false;
 689                 goto done;
 690         }
 691
 692         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 693         if (rc == -1) {
 694                 DEBUG(0, ("Failed to listen on samr pipe - %s\n",
 695                           strerror(errno)));
 696                 ok = false;
 697                 goto done;
 698         }
 699         listen_fd[*listen_fd_size] = fd;
 700         (*listen_fd_size)++;
 701
 702         v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
 703         if (v == NULL) {
 704                 ok = false;
 705                 goto done;
 706         }
 707
 708         status = dcerpc_binding_vector_replace_iface(&ndr_table_netlogon, v);
 709         if (!NT_STATUS_IS_OK(status)) {
 710                 return false;
 711         }
 712
 713         status = dcerpc_binding_vector_add_np_default(&ndr_table_netlogon, v);
 714         if (!NT_STATUS_IS_OK(status)) {
 715                 ok = false;
 716                 goto done;
 717         }
 718
 719         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_netlogon, v);
 720         if (!NT_STATUS_IS_OK(status)) {
 721                 ok = false;
 722                 goto done;
 723         }
 724
 725 done:
 726         talloc_free(tmp_ctx);
 727         return ok;
 728 }
 729
 730 void start_lsasd(struct tevent_context *ev_ctx,
 731                  struct messaging_context *msg_ctx)
 732 {
 733         NTSTATUS status;
 734         int listen_fd[LSASD_MAX_SOCKETS];
 735         int listen_fd_size = 0;
 736         pid_t pid;
 737         int rc;
 738         bool ok;
 739
 740         DEBUG(1, ("Forking LSA Service Daemon\n"));
 741
 742         /*
 743          * Block signals before forking child as it will have to
 744          * set its own handlers. Child will re-enable SIGHUP as
 745          * soon as the handlers are set up.
 746          */
 747         BlockSignals(true, SIGTERM);
 748         BlockSignals(true, SIGHUP);
 749
 750         pid = sys_fork();
 751         if (pid == -1) {
 752                 DEBUG(0, ("Failed to fork LSASD [%s], aborting ...\n",
 753                            strerror(errno)));
 754                 exit(1);
 755         }
 756
 757         /* parent or error */
 758         if (pid != 0) {
 759
 760                 /* Re-enable SIGHUP before returnig */
 761                 BlockSignals(false, SIGTERM);
 762                 BlockSignals(false, SIGHUP);
 763
 764                 return;
 765         }
 766
 767         /* child */
 768         close_low_fds(false);
 769
 770         status = reinit_after_fork(msg_ctx,
 771                                    ev_ctx,
 772                                    procid_self(), true);
 773         if (!NT_STATUS_IS_OK(status)) {
 774                 DEBUG(0,("reinit_after_fork() failed\n"));
 775                 smb_panic("reinit_after_fork() failed");
 776         }
 777
 778         lsasd_reopen_logs(0);
 779         pfh_daemon_config(DAEMON_NAME,
 780                           &pf_lsasd_cfg,
 781                           &default_pf_lsasd_cfg);
 782
 783         lsasd_setup_sig_term_handler(ev_ctx);
 784         lsasd_setup_sig_hup_handler(ev_ctx);
 785
 786         BlockSignals(false, SIGTERM);
 787         BlockSignals(false, SIGHUP);
 788
 789         ok = lsasd_create_sockets(ev_ctx, msg_ctx, listen_fd, &listen_fd_size);
 790         if (!ok) {
 791                 exit(1);
 792         }
 793
 794         /* start children before any more initialization is done */
 795         ok = prefork_create_pool(ev_ctx, /* mem_ctx */
 796                                  ev_ctx,
 797                                  msg_ctx,
 798                                  listen_fd_size,
 799                                  listen_fd,
 800                                  pf_lsasd_cfg.min_children,
 801                                  pf_lsasd_cfg.max_children,
 802                                  &lsasd_children_main,
 803                                  NULL,
 804                                  &lsasd_pool);
 805         if (!ok) {
 806                 exit(1);
 807         }
 808
 809         if (!serverid_register(procid_self(), FLAG_MSG_GENERAL)) {
 810                 exit(1);
 811         }
 812
 813         messaging_register(msg_ctx,
 814                            ev_ctx,
 815                            MSG_SMB_CONF_UPDATED,
 816                            lsasd_smb_conf_updated);
 817
 818         status = rpc_lsarpc_init(NULL);
 819         if (!NT_STATUS_IS_OK(status)) {
 820                 DEBUG(0, ("Failed to register winreg rpc inteface! (%s)\n",
 821                           nt_errstr(status)));
 822                 exit(1);
 823         }
 824
 825         status = rpc_samr_init(NULL);
 826         if (!NT_STATUS_IS_OK(status)) {
 827                 DEBUG(0, ("Failed to register lsasd rpc inteface! (%s)\n",
 828                           nt_errstr(status)));
 829                 exit(1);
 830         }
 831
 832         status = rpc_netlogon_init(NULL);
 833         if (!NT_STATUS_IS_OK(status)) {
 834                 DEBUG(0, ("Failed to register lsasd rpc inteface! (%s)\n",
 835                           nt_errstr(status)));
 836                 exit(1);
 837         }
 838
 839         ok = lsasd_setup_children_monitor(ev_ctx, msg_ctx);
 840         if (!ok) {
 841                 DEBUG(0, ("Failed to setup children monitoring!\n"));
 842                 exit(1);
 843         }
 844
 845         DEBUG(1, ("LSASD Daemon Started (%d)\n", getpid()));
 846
 847         /* loop forever */
 848         rc = tevent_loop_wait(ev_ctx);
 849
 850         /* should not be reached */
 851         DEBUG(0,("lsasd: tevent_loop_wait() exited with %d - %s\n",
 852                  rc, (rc == 0) ? "out of events" : strerror(errno)));
 853         exit(1);
 854 }