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/util/util_process.h"
  28
  29 #include "lib/id_cache.h"
  30
  31 #include "../lib/tsocket/tsocket.h"
  32 #include "lib/server_prefork.h"
  33 #include "lib/server_prefork_util.h"
  34 #include "librpc/rpc/dcerpc_ep.h"
  35
  36 #include "rpc_server/rpc_server.h"
  37 #include "rpc_server/rpc_ep_register.h"
  38 #include "rpc_server/rpc_sock_helper.h"
  39
  40 #include "librpc/gen_ndr/srv_lsa.h"
  41 #include "librpc/gen_ndr/srv_samr.h"
  42 #include "librpc/gen_ndr/srv_netlogon.h"
  43
  44 #define DAEMON_NAME "lsasd"
  45 #define LSASD_MAX_SOCKETS 64
  46
  47 static struct server_id parent_id;
  48 static struct prefork_pool *lsasd_pool = NULL;
  49 static int lsasd_child_id = 0;
  50
  51 static struct pf_daemon_config default_pf_lsasd_cfg = {
  52         .prefork_status = PFH_INIT,
  53         .min_children = 5,
  54         .max_children = 25,
  55         .spawn_rate = 5,
  56         .max_allowed_clients = 100,
  57         .child_min_life = 60 /* 1 minute minimum life time */
  58 };
  59 static struct pf_daemon_config pf_lsasd_cfg = { 0 };
  60
  61 void start_lsasd(struct tevent_context *ev_ctx,
  62                  struct messaging_context *msg_ctx);
  63
  64 static void lsasd_reopen_logs(int child_id)
  65 {
  66         char *lfile = lp_logfile(talloc_tos());
  67         char *extension;
  68         int rc;
  69
  70         if (child_id) {
  71                 rc = asprintf(&extension, "%s.%d", DAEMON_NAME, child_id);
  72         } else {
  73                 rc = asprintf(&extension, "%s", DAEMON_NAME);
  74         }
  75         if (rc == -1) {
  76                 return;
  77         }
  78
  79         rc = 0;
  80         if (lfile == NULL || lfile[0] == '\0') {
  81                 rc = asprintf(&lfile, "%s/log.%s",
  82                               get_dyn_LOGFILEBASE(), extension);
  83         } else {
  84                 if (strstr(lfile, extension) == NULL) {
  85                         if (child_id) {
  86                                 rc = asprintf(&lfile, "%s.%d",
  87                                                 lp_logfile(talloc_tos()),
  88                                                 child_id);
  89                         } else {
  90                                 rc = asprintf(&lfile, "%s.%s",
  91                                                 lp_logfile(talloc_tos()),
  92                                                 extension);
  93                         }
  94                 }
  95         }
  96
  97         if (rc > 0) {
  98                 lp_set_logfile(lfile);
  99                 SAFE_FREE(lfile);
 100         }
 101
 102         SAFE_FREE(extension);
 103
 104         reopen_logs();
 105 }
 106
 107 static void lsasd_smb_conf_updated(struct messaging_context *msg,
 108                                   void *private_data,
 109                                   uint32_t msg_type,
 110                                   struct server_id server_id,
 111                                   DATA_BLOB *data)
 112 {
 113         struct tevent_context *ev_ctx;
 114
 115         DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
 116         ev_ctx = talloc_get_type_abort(private_data, struct tevent_context);
 117
 118         change_to_root_user();
 119         lp_load_global(get_dyn_CONFIGFILE());
 120
 121         lsasd_reopen_logs(lsasd_child_id);
 122         if (lsasd_child_id == 0) {
 123                 pfh_daemon_config(DAEMON_NAME,
 124                                   &pf_lsasd_cfg,
 125                                   &default_pf_lsasd_cfg);
 126                 pfh_manage_pool(ev_ctx, msg, &pf_lsasd_cfg, lsasd_pool);
 127         }
 128 }
 129
 130 static void lsasd_sig_term_handler(struct tevent_context *ev,
 131                                   struct tevent_signal *se,
 132                                   int signum,
 133                                   int count,
 134                                   void *siginfo,
 135                                   void *private_data)
 136 {
 137         rpc_netlogon_shutdown();
 138         rpc_samr_shutdown();
 139         rpc_lsarpc_shutdown();
 140
 141         DEBUG(0, ("termination signal\n"));
 142         exit(0);
 143 }
 144
 145 static void lsasd_setup_sig_term_handler(struct tevent_context *ev_ctx)
 146 {
 147         struct tevent_signal *se;
 148
 149         se = tevent_add_signal(ev_ctx,
 150                                ev_ctx,
 151                                SIGTERM, 0,
 152                                lsasd_sig_term_handler,
 153                                NULL);
 154         if (!se) {
 155                 DEBUG(0, ("failed to setup SIGTERM handler\n"));
 156                 exit(1);
 157         }
 158 }
 159
 160 static void lsasd_sig_hup_handler(struct tevent_context *ev,
 161                                     struct tevent_signal *se,
 162                                     int signum,
 163                                     int count,
 164                                     void *siginfo,
 165                                     void *pvt)
 166 {
 167
 168         change_to_root_user();
 169         lp_load_global(get_dyn_CONFIGFILE());
 170
 171         lsasd_reopen_logs(lsasd_child_id);
 172         pfh_daemon_config(DAEMON_NAME,
 173                           &pf_lsasd_cfg,
 174                           &default_pf_lsasd_cfg);
 175
 176         /* relay to all children */
 177         prefork_send_signal_to_all(lsasd_pool, SIGHUP);
 178 }
 179
 180 static void lsasd_setup_sig_hup_handler(struct tevent_context *ev_ctx)
 181 {
 182         struct tevent_signal *se;
 183
 184         se = tevent_add_signal(ev_ctx,
 185                                ev_ctx,
 186                                SIGHUP, 0,
 187                                lsasd_sig_hup_handler,
 188                                NULL);
 189         if (!se) {
 190                 DEBUG(0, ("failed to setup SIGHUP handler\n"));
 191                 exit(1);
 192         }
 193 }
 194
 195 /**********************************************************
 196  * Children
 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         change_to_root_user();
 207         lsasd_reopen_logs(lsasd_child_id);
 208 }
 209
 210 static bool lsasd_setup_chld_hup_handler(struct tevent_context *ev_ctx)
 211 {
 212         struct tevent_signal *se;
 213
 214         se = tevent_add_signal(ev_ctx,
 215                                ev_ctx,
 216                                SIGHUP, 0,
 217                                lsasd_chld_sig_hup_handler,
 218                                NULL);
 219         if (!se) {
 220                 DEBUG(1, ("failed to setup SIGHUP handler"));
 221                 return false;
 222         }
 223
 224         return true;
 225 }
 226
 227 static void parent_ping(struct messaging_context *msg_ctx,
 228                         void *private_data,
 229                         uint32_t msg_type,
 230                         struct server_id server_id,
 231                         DATA_BLOB *data)
 232 {
 233
 234         /* The fact we received this message is enough to let make the event
 235          * loop if it was idle. lsasd_children_main will cycle through
 236          * lsasd_next_client at least once. That function will take whatever
 237          * action is necessary */
 238
 239         DEBUG(10, ("Got message that the parent changed status.\n"));
 240         return;
 241 }
 242
 243 static bool lsasd_child_init(struct tevent_context *ev_ctx,
 244                              int child_id,
 245                              struct pf_worker_data *pf)
 246 {
 247         NTSTATUS status;
 248         struct messaging_context *msg_ctx = server_messaging_context();
 249         bool ok;
 250
 251         status = reinit_after_fork(msg_ctx, ev_ctx,
 252                                    true);
 253         if (!NT_STATUS_IS_OK(status)) {
 254                 DEBUG(0,("reinit_after_fork() failed\n"));
 255                 smb_panic("reinit_after_fork() failed");
 256         }
 257
 258         prctl_set_comment("lsasd-child");
 259
 260         lsasd_child_id = child_id;
 261         lsasd_reopen_logs(child_id);
 262
 263         ok = lsasd_setup_chld_hup_handler(ev_ctx);
 264         if (!ok) {
 265                 return false;
 266         }
 267
 268         if (!serverid_register(messaging_server_id(msg_ctx),
 269                                FLAG_MSG_GENERAL)) {
 270                 return false;
 271         }
 272
 273         messaging_register(msg_ctx, ev_ctx,
 274                            MSG_SMB_CONF_UPDATED, lsasd_smb_conf_updated);
 275         messaging_register(msg_ctx, ev_ctx,
 276                            MSG_PREFORK_PARENT_EVENT, parent_ping);
 277         id_cache_register_msgs(msg_ctx);
 278
 279         status = rpc_lsarpc_init(NULL);
 280         if (!NT_STATUS_IS_OK(status)) {
 281                 DEBUG(0, ("Failed to register lsarpc rpc inteface! (%s)\n",
 282                           nt_errstr(status)));
 283                 return false;
 284         }
 285
 286         status = rpc_samr_init(NULL);
 287         if (!NT_STATUS_IS_OK(status)) {
 288                 DEBUG(0, ("Failed to register samr rpc inteface! (%s)\n",
 289                           nt_errstr(status)));
 290                 return false;
 291         }
 292
 293         status = rpc_netlogon_init(NULL);
 294         if (!NT_STATUS_IS_OK(status)) {
 295                 DEBUG(0, ("Failed to register netlogon rpc inteface! (%s)\n",
 296                           nt_errstr(status)));
 297                 return false;
 298         }
 299
 300         return true;
 301 }
 302
 303 struct lsasd_children_data {
 304         struct tevent_context *ev_ctx;
 305         struct messaging_context *msg_ctx;
 306         struct pf_worker_data *pf;
 307         int listen_fd_size;
 308         int *listen_fds;
 309 };
 310
 311 static void lsasd_next_client(void *pvt);
 312
 313 static int lsasd_children_main(struct tevent_context *ev_ctx,
 314                                struct messaging_context *msg_ctx,
 315                                struct pf_worker_data *pf,
 316                                int child_id,
 317                                int listen_fd_size,
 318                                int *listen_fds,
 319                                void *private_data)
 320 {
 321         struct lsasd_children_data *data;
 322         bool ok;
 323         int ret = 0;
 324
 325         ok = lsasd_child_init(ev_ctx, child_id, pf);
 326         if (!ok) {
 327                 return 1;
 328         }
 329
 330         data = talloc(ev_ctx, struct lsasd_children_data);
 331         if (!data) {
 332                 return 1;
 333         }
 334         data->pf = pf;
 335         data->ev_ctx = ev_ctx;
 336         data->msg_ctx = msg_ctx;
 337         data->listen_fd_size = listen_fd_size;
 338         data->listen_fds = listen_fds;
 339
 340         /* loop until it is time to exit */
 341         while (pf->status != PF_WORKER_EXITING) {
 342                 /* try to see if it is time to schedule the next client */
 343                 lsasd_next_client(data);
 344
 345                 ret = tevent_loop_once(ev_ctx);
 346                 if (ret != 0) {
 347                         DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
 348                                   ret, strerror(errno)));
 349                         pf->status = PF_WORKER_EXITING;
 350                 }
 351         }
 352
 353         return ret;
 354 }
 355
 356 static void lsasd_client_terminated(void *pvt)
 357 {
 358         struct lsasd_children_data *data;
 359
 360         data = talloc_get_type_abort(pvt, struct lsasd_children_data);
 361
 362         pfh_client_terminated(data->pf);
 363
 364         lsasd_next_client(pvt);
 365 }
 366
 367 struct lsasd_new_client {
 368         struct lsasd_children_data *data;
 369 };
 370
 371 static void lsasd_handle_client(struct tevent_req *req);
 372
 373 static void lsasd_next_client(void *pvt)
 374 {
 375         struct tevent_req *req;
 376         struct lsasd_children_data *data;
 377         struct lsasd_new_client *next;
 378
 379         data = talloc_get_type_abort(pvt, struct lsasd_children_data);
 380
 381         if (!pfh_child_allowed_to_accept(data->pf)) {
 382                 /* nothing to do for now we are already listening
 383                  * or we are not allowed to listen further */
 384                 return;
 385         }
 386
 387         next = talloc_zero(data, struct lsasd_new_client);
 388         if (!next) {
 389                 DEBUG(1, ("Out of memory!?\n"));
 390                 return;
 391         }
 392         next->data = data;
 393
 394         req = prefork_listen_send(next,
 395                                   data->ev_ctx,
 396                                   data->pf,
 397                                   data->listen_fd_size,
 398                                   data->listen_fds);
 399         if (!req) {
 400                 DEBUG(1, ("Failed to make listening request!?\n"));
 401                 talloc_free(next);
 402                 return;
 403         }
 404         tevent_req_set_callback(req, lsasd_handle_client, next);
 405 }
 406
 407 static void lsasd_handle_client(struct tevent_req *req)
 408 {
 409         struct lsasd_children_data *data;
 410         struct lsasd_new_client *client;
 411         const DATA_BLOB ping = data_blob_null;
 412         int rc;
 413         int sd;
 414         TALLOC_CTX *tmp_ctx;
 415         struct tsocket_address *srv_addr;
 416         struct tsocket_address *cli_addr;
 417
 418         client = tevent_req_callback_data(req, struct lsasd_new_client);
 419         data = client->data;
 420
 421         tmp_ctx = talloc_stackframe();
 422         if (tmp_ctx == NULL) {
 423                 DEBUG(1, ("Failed to allocate stackframe!\n"));
 424                 return;
 425         }
 426
 427         rc = prefork_listen_recv(req,
 428                                  tmp_ctx,
 429                                  &sd,
 430                                  &srv_addr,
 431                                  &cli_addr);
 432
 433         /* this will free the request too */
 434         talloc_free(client);
 435
 436         if (rc != 0) {
 437                 DEBUG(6, ("No client connection was available after all!\n"));
 438                 goto done;
 439         }
 440
 441         /* Warn parent that our status changed */
 442         messaging_send(data->msg_ctx, parent_id,
 443                         MSG_PREFORK_CHILD_EVENT, &ping);
 444
 445         DEBUG(2, ("LSASD preforked child %d got client connection!\n",
 446                   (int)(data->pf->pid)));
 447
 448         if (tsocket_address_is_inet(srv_addr, "ip")) {
 449                 DEBUG(3, ("Got a tcpip client connection from %s on inteface %s\n",
 450                            tsocket_address_string(cli_addr, tmp_ctx),
 451                            tsocket_address_string(srv_addr, tmp_ctx)));
 452
 453                 dcerpc_ncacn_accept(data->ev_ctx,
 454                                     data->msg_ctx,
 455                                     NCACN_IP_TCP,
 456                                     "IP",
 457                                     cli_addr,
 458                                     srv_addr,
 459                                     sd,
 460                                     NULL);
 461         } else if (tsocket_address_is_unix(srv_addr)) {
 462                 const char *p;
 463                 const char *b;
 464
 465                 p = tsocket_address_unix_path(srv_addr, tmp_ctx);
 466                 if (p == NULL) {
 467                         talloc_free(tmp_ctx);
 468                         return;
 469                 }
 470
 471                 b = strrchr(p, '/');
 472                 if (b != NULL) {
 473                         b++;
 474                 } else {
 475                         b = p;
 476                 }
 477
 478                 if (strstr(p, "/np/")) {
 479                         named_pipe_accept_function(data->ev_ctx,
 480                                                    data->msg_ctx,
 481                                                    b,
 482                                                    sd,
 483                                                    lsasd_client_terminated,
 484                                                    data);
 485                 } else {
 486                         dcerpc_ncacn_accept(data->ev_ctx,
 487                                             data->msg_ctx,
 488                                             NCALRPC,
 489                                             b,
 490                                             cli_addr,
 491                                             srv_addr,
 492                                             sd,
 493                                             NULL);
 494                 }
 495         } else {
 496                 DEBUG(0, ("ERROR: Unsupported socket!\n"));
 497         }
 498
 499 done:
 500         talloc_free(tmp_ctx);
 501 }
 502
 503 /*
 504  * MAIN
 505  */
 506
 507 static void child_ping(struct messaging_context *msg_ctx,
 508                         void *private_data,
 509                         uint32_t msg_type,
 510                         struct server_id server_id,
 511                         DATA_BLOB *data)
 512 {
 513         struct tevent_context *ev_ctx;
 514
 515         ev_ctx = talloc_get_type_abort(private_data, struct tevent_context);
 516
 517         DEBUG(10, ("Got message that a child changed status.\n"));
 518         pfh_manage_pool(ev_ctx, msg_ctx, &pf_lsasd_cfg, lsasd_pool);
 519 }
 520
 521 static bool lsasd_schedule_check(struct tevent_context *ev_ctx,
 522                                  struct messaging_context *msg_ctx,
 523                                  struct timeval current_time);
 524
 525 static void lsasd_check_children(struct tevent_context *ev_ctx,
 526                                     struct tevent_timer *te,
 527                                     struct timeval current_time,
 528                                     void *pvt);
 529
 530 static void lsasd_sigchld_handler(struct tevent_context *ev_ctx,
 531                                   struct prefork_pool *pfp,
 532                                   void *pvt)
 533 {
 534         struct messaging_context *msg_ctx;
 535
 536         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 537
 538         /* run pool management so we can fork/retire or increase
 539          * the allowed connections per child based on load */
 540         pfh_manage_pool(ev_ctx, msg_ctx, &pf_lsasd_cfg, lsasd_pool);
 541 }
 542
 543 static bool lsasd_setup_children_monitor(struct tevent_context *ev_ctx,
 544                                          struct messaging_context *msg_ctx)
 545 {
 546         bool ok;
 547
 548         /* add our oun sigchld callback */
 549         prefork_set_sigchld_callback(lsasd_pool, lsasd_sigchld_handler, msg_ctx);
 550
 551         ok = lsasd_schedule_check(ev_ctx, msg_ctx, tevent_timeval_current());
 552
 553         return ok;
 554 }
 555
 556 static bool lsasd_schedule_check(struct tevent_context *ev_ctx,
 557                                  struct messaging_context *msg_ctx,
 558                                  struct timeval current_time)
 559 {
 560         struct tevent_timer *te;
 561         struct timeval next_event;
 562
 563         /* check situation again in 10 seconds */
 564         next_event = tevent_timeval_current_ofs(10, 0);
 565
 566         /* TODO: check when the socket becomes readable, so that children
 567          * are checked only when there is some activity ? */
 568         te = tevent_add_timer(ev_ctx, lsasd_pool, next_event,
 569                               lsasd_check_children, msg_ctx);
 570         if (!te) {
 571                 DEBUG(2, ("Failed to set up children monitoring!\n"));
 572                 return false;
 573         }
 574
 575         return true;
 576 }
 577
 578 static void lsasd_check_children(struct tevent_context *ev_ctx,
 579                                  struct tevent_timer *te,
 580                                  struct timeval current_time,
 581                                  void *pvt)
 582 {
 583         struct messaging_context *msg_ctx;
 584
 585         msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
 586
 587         pfh_manage_pool(ev_ctx, msg_ctx, &pf_lsasd_cfg, lsasd_pool);
 588
 589         lsasd_schedule_check(ev_ctx, msg_ctx, current_time);
 590 }
 591
 592 /*
 593  * start it up
 594  */
 595
 596 static bool lsasd_create_sockets(struct tevent_context *ev_ctx,
 597                                  struct messaging_context *msg_ctx,
 598                                  int *listen_fd,
 599                                  int *listen_fd_size)
 600 {
 601         struct dcerpc_binding_vector *v, *v_orig;
 602         TALLOC_CTX *tmp_ctx;
 603         NTSTATUS status;
 604         uint32_t i;
 605         int fd = -1;
 606         int rc;
 607         bool ok = false;
 608
 609         tmp_ctx = talloc_stackframe();
 610         if (tmp_ctx == NULL) {
 611                 return false;
 612         }
 613
 614         status = dcerpc_binding_vector_new(tmp_ctx, &v_orig);
 615         if (!NT_STATUS_IS_OK(status)) {
 616                 goto done;
 617         }
 618
 619         /* Create only one tcpip listener for all services */
 620         status = rpc_create_tcpip_sockets(&ndr_table_lsarpc,
 621                                           v_orig,
 622                                           0,
 623                                           listen_fd,
 624                                           listen_fd_size);
 625         if (!NT_STATUS_IS_OK(status)) {
 626                 goto done;
 627         }
 628
 629         /* Start to listen on tcpip sockets */
 630         for (i = 0; i < *listen_fd_size; i++) {
 631                 rc = listen(listen_fd[i], pf_lsasd_cfg.max_allowed_clients);
 632                 if (rc == -1) {
 633                         DEBUG(0, ("Failed to listen on tcpip socket - %s\n",
 634                                   strerror(errno)));
 635                         goto done;
 636                 }
 637         }
 638
 639         /* LSARPC */
 640         fd = create_named_pipe_socket("lsarpc");
 641         if (fd < 0) {
 642                 goto done;
 643         }
 644
 645         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 646         if (rc == -1) {
 647                 DEBUG(0, ("Failed to listen on lsarpc pipe - %s\n",
 648                           strerror(errno)));
 649                 goto done;
 650         }
 651         listen_fd[*listen_fd_size] = fd;
 652         (*listen_fd_size)++;
 653
 654         fd = create_named_pipe_socket("lsass");
 655         if (fd < 0) {
 656                 goto done;
 657         }
 658
 659         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 660         if (rc == -1) {
 661                 DEBUG(0, ("Failed to listen on lsass pipe - %s\n",
 662                           strerror(errno)));
 663                 goto done;
 664         }
 665         listen_fd[*listen_fd_size] = fd;
 666         (*listen_fd_size)++;
 667
 668         fd = create_dcerpc_ncalrpc_socket("lsarpc");
 669         if (fd < 0) {
 670                 goto done;
 671         }
 672
 673         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 674         if (rc == -1) {
 675                 DEBUG(0, ("Failed to listen on lsarpc ncalrpc - %s\n",
 676                           strerror(errno)));
 677                 goto done;
 678         }
 679         listen_fd[*listen_fd_size] = fd;
 680         (*listen_fd_size)++;
 681         fd = -1;
 682
 683         v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
 684         if (v == NULL) {
 685                 goto done;
 686         }
 687
 688         status = dcerpc_binding_vector_replace_iface(&ndr_table_lsarpc, v);
 689         if (!NT_STATUS_IS_OK(status)) {
 690                 goto done;
 691         }
 692
 693         status = dcerpc_binding_vector_add_np_default(&ndr_table_lsarpc, v);
 694         if (!NT_STATUS_IS_OK(status)) {
 695                 goto done;
 696         }
 697
 698         status = dcerpc_binding_vector_add_unix(&ndr_table_lsarpc, v, "lsarpc");
 699         if (!NT_STATUS_IS_OK(status)) {
 700                 goto done;
 701         }
 702
 703         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_lsarpc, v);
 704         if (!NT_STATUS_IS_OK(status)) {
 705                 goto done;
 706         }
 707
 708         /* SAMR */
 709         fd = create_named_pipe_socket("samr");
 710         if (fd < 0) {
 711                 goto done;
 712         }
 713
 714         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 715         if (rc == -1) {
 716                 DEBUG(0, ("Failed to listen on samr pipe - %s\n",
 717                           strerror(errno)));
 718                 goto done;
 719         }
 720         listen_fd[*listen_fd_size] = fd;
 721         (*listen_fd_size)++;
 722
 723         fd = create_dcerpc_ncalrpc_socket("samr");
 724         if (fd < 0) {
 725                 goto done;
 726         }
 727
 728         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 729         if (rc == -1) {
 730                 DEBUG(0, ("Failed to listen on samr ncalrpc - %s\n",
 731                           strerror(errno)));
 732                 goto done;
 733         }
 734         listen_fd[*listen_fd_size] = fd;
 735         (*listen_fd_size)++;
 736         fd = -1;
 737
 738         v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
 739         if (v == NULL) {
 740                 goto done;
 741         }
 742
 743         status = dcerpc_binding_vector_replace_iface(&ndr_table_samr, v);
 744         if (!NT_STATUS_IS_OK(status)) {
 745                 goto done;
 746         }
 747
 748         status = dcerpc_binding_vector_add_np_default(&ndr_table_samr, v);
 749         if (!NT_STATUS_IS_OK(status)) {
 750                 goto done;
 751         }
 752
 753         status = dcerpc_binding_vector_add_unix(&ndr_table_lsarpc, v, "samr");
 754         if (!NT_STATUS_IS_OK(status)) {
 755                 goto done;
 756         }
 757
 758         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_samr, v);
 759         if (!NT_STATUS_IS_OK(status)) {
 760                 goto done;
 761         }
 762
 763         /* NETLOGON */
 764         fd = create_named_pipe_socket("netlogon");
 765         if (fd < 0) {
 766                 goto done;
 767         }
 768
 769         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 770         if (rc == -1) {
 771                 DEBUG(0, ("Failed to listen on samr pipe - %s\n",
 772                           strerror(errno)));
 773                 goto done;
 774         }
 775         listen_fd[*listen_fd_size] = fd;
 776         (*listen_fd_size)++;
 777
 778         fd = create_dcerpc_ncalrpc_socket("netlogon");
 779         if (fd < 0) {
 780                 goto done;
 781         }
 782
 783         rc = listen(fd, pf_lsasd_cfg.max_allowed_clients);
 784         if (rc == -1) {
 785                 DEBUG(0, ("Failed to listen on netlogon ncalrpc - %s\n",
 786                           strerror(errno)));
 787                 goto done;
 788         }
 789         listen_fd[*listen_fd_size] = fd;
 790         (*listen_fd_size)++;
 791         fd = -1;
 792
 793         v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
 794         if (v == NULL) {
 795                 goto done;
 796         }
 797
 798         status = dcerpc_binding_vector_replace_iface(&ndr_table_netlogon, v);
 799         if (!NT_STATUS_IS_OK(status)) {
 800                 goto done;
 801         }
 802
 803         status = dcerpc_binding_vector_add_np_default(&ndr_table_netlogon, v);
 804         if (!NT_STATUS_IS_OK(status)) {
 805                 goto done;
 806         }
 807
 808         status = dcerpc_binding_vector_add_unix(&ndr_table_lsarpc, v, "netlogon");
 809         if (!NT_STATUS_IS_OK(status)) {
 810                 goto done;
 811         }
 812
 813         status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_netlogon, v);
 814         if (!NT_STATUS_IS_OK(status)) {
 815                 goto done;
 816         }
 817
 818         ok = true;
 819 done:
 820         if (fd != -1) {
 821                 close(fd);
 822         }
 823         talloc_free(tmp_ctx);
 824         return ok;
 825 }
 826
 827 void start_lsasd(struct tevent_context *ev_ctx,
 828                  struct messaging_context *msg_ctx)
 829 {
 830         NTSTATUS status;
 831         int listen_fd[LSASD_MAX_SOCKETS];
 832         int listen_fd_size = 0;
 833         pid_t pid;
 834         int rc;
 835         bool ok;
 836
 837         DEBUG(1, ("Forking LSA Service Daemon\n"));
 838
 839         /*
 840          * Block signals before forking child as it will have to
 841          * set its own handlers. Child will re-enable SIGHUP as
 842          * soon as the handlers are set up.
 843          */
 844         BlockSignals(true, SIGTERM);
 845         BlockSignals(true, SIGHUP);
 846
 847         pid = fork();
 848         if (pid == -1) {
 849                 DEBUG(0, ("Failed to fork LSASD [%s], aborting ...\n",
 850                            strerror(errno)));
 851                 exit(1);
 852         }
 853
 854         /* parent or error */
 855         if (pid != 0) {
 856
 857                 /* Re-enable SIGHUP before returnig */
 858                 BlockSignals(false, SIGTERM);
 859                 BlockSignals(false, SIGHUP);
 860
 861                 return;
 862         }
 863
 864         status = smbd_reinit_after_fork(msg_ctx, ev_ctx, true);
 865         if (!NT_STATUS_IS_OK(status)) {
 866                 DEBUG(0,("reinit_after_fork() failed\n"));
 867                 smb_panic("reinit_after_fork() failed");
 868         }
 869
 870         prctl_set_comment("lsasd-master");
 871
 872         /* save the parent process id so the children can use it later */
 873         parent_id = messaging_server_id(msg_ctx);
 874
 875         lsasd_reopen_logs(0);
 876         pfh_daemon_config(DAEMON_NAME,
 877                           &pf_lsasd_cfg,
 878                           &default_pf_lsasd_cfg);
 879
 880         lsasd_setup_sig_term_handler(ev_ctx);
 881         lsasd_setup_sig_hup_handler(ev_ctx);
 882
 883         BlockSignals(false, SIGTERM);
 884         BlockSignals(false, SIGHUP);
 885
 886         ok = lsasd_create_sockets(ev_ctx, msg_ctx, listen_fd, &listen_fd_size);
 887         if (!ok) {
 888                 exit(1);
 889         }
 890
 891         /* start children before any more initialization is done */
 892         ok = prefork_create_pool(ev_ctx, /* mem_ctx */
 893                                  ev_ctx,
 894                                  msg_ctx,
 895                                  listen_fd_size,
 896                                  listen_fd,
 897                                  pf_lsasd_cfg.min_children,
 898                                  pf_lsasd_cfg.max_children,
 899                                  &lsasd_children_main,
 900                                  NULL,
 901                                  &lsasd_pool);
 902         if (!ok) {
 903                 exit(1);
 904         }
 905
 906         if (!serverid_register(messaging_server_id(msg_ctx),
 907                                FLAG_MSG_GENERAL)) {
 908                 exit(1);
 909         }
 910
 911         messaging_register(msg_ctx,
 912                            ev_ctx,
 913                            MSG_SMB_CONF_UPDATED,
 914                            lsasd_smb_conf_updated);
 915         messaging_register(msg_ctx, ev_ctx,
 916                            MSG_PREFORK_CHILD_EVENT, child_ping);
 917
 918         status = rpc_lsarpc_init(NULL);
 919         if (!NT_STATUS_IS_OK(status)) {
 920                 DEBUG(0, ("Failed to register lsarpc rpc inteface in lsasd! (%s)\n",
 921                           nt_errstr(status)));
 922                 exit(1);
 923         }
 924
 925         status = rpc_samr_init(NULL);
 926         if (!NT_STATUS_IS_OK(status)) {
 927                 DEBUG(0, ("Failed to register samr rpc inteface in lsasd! (%s)\n",
 928                           nt_errstr(status)));
 929                 exit(1);
 930         }
 931
 932         status = rpc_netlogon_init(NULL);
 933         if (!NT_STATUS_IS_OK(status)) {
 934                 DEBUG(0, ("Failed to register netlogon rpc inteface in lsasd! (%s)\n",
 935                           nt_errstr(status)));
 936                 exit(1);
 937         }
 938
 939         ok = lsasd_setup_children_monitor(ev_ctx, msg_ctx);
 940         if (!ok) {
 941                 DEBUG(0, ("Failed to setup children monitoring!\n"));
 942                 exit(1);
 943         }
 944
 945         DEBUG(1, ("LSASD Daemon Started (%u)\n", (unsigned int)getpid()));
 946
 947         /* loop forever */
 948         rc = tevent_loop_wait(ev_ctx);
 949
 950         /* should not be reached */
 951         DEBUG(0,("lsasd: tevent_loop_wait() exited with %d - %s\n",
 952                  rc, (rc == 0) ? "out of events" : strerror(errno)));
 953         exit(1);
 954 }