source/smbd/server.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main SMB server routines
   4    Copyright (C) Andrew Tridgell                1992-1998
   5    Copyright (C) Martin Pool                    2002
   6    Copyright (C) Jelmer Vernooij                2002-2003
   7    Copyright (C) Volker Lendecke                1993-2007
   8    Copyright (C) Jeremy Allison                 1993-2007
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25
  26 static_decl_rpc;
  27
  28 static int am_parent = 1;
  29
  30 extern struct auth_context *negprot_global_auth_context;
  31 extern SIG_ATOMIC_T got_sig_term;
  32 extern SIG_ATOMIC_T reload_after_sighup;
  33 static SIG_ATOMIC_T got_sig_cld;
  34
  35 #ifdef WITH_DFS
  36 extern int dcelogin_atmost_once;
  37 #endif /* WITH_DFS */
  38
  39 /* really we should have a top level context structure that has the
  40    client file descriptor as an element. That would require a major rewrite :(
  41
  42    the following 2 functions are an alternative - they make the file
  43    descriptor private to smbd
  44  */
  45 static int server_fd = -1;
  46
  47 int smbd_server_fd(void)
  48 {
  49         return server_fd;
  50 }
  51
  52 static void smbd_set_server_fd(int fd)
  53 {
  54         server_fd = fd;
  55 }
  56
  57 int get_client_fd(void)
  58 {
  59         return server_fd;
  60 }
  61
  62 #ifdef CLUSTER_SUPPORT
  63 static int client_get_tcp_info(struct sockaddr_storage *server,
  64                                struct sockaddr_storage *client)
  65 {
  66         socklen_t length;
  67         if (server_fd == -1) {
  68                 return -1;
  69         }
  70         length = sizeof(*server);
  71         if (getsockname(server_fd, (struct sockaddr *)server, &length) != 0) {
  72                 return -1;
  73         }
  74         length = sizeof(*client);
  75         if (getpeername(server_fd, (struct sockaddr *)client, &length) != 0) {
  76                 return -1;
  77         }
  78         return 0;
  79 }
  80 #endif
  81
  82 struct event_context *smbd_event_context(void)
  83 {
  84         static struct event_context *ctx;
  85
  86         if (!ctx && !(ctx = event_context_init(talloc_autofree_context()))) {
  87                 smb_panic("Could not init smbd event context");
  88         }
  89         return ctx;
  90 }
  91
  92 struct messaging_context *smbd_messaging_context(void)
  93 {
  94         static struct messaging_context *ctx;
  95
  96         if (ctx == NULL) {
  97                 ctx = messaging_init(talloc_autofree_context(), server_id_self(),
  98                                      smbd_event_context());
  99         }
 100         if (ctx == NULL) {
 101                 DEBUG(0, ("Could not init smbd messaging context.\n"));
 102         }
 103         return ctx;
 104 }
 105
 106 struct memcache *smbd_memcache(void)
 107 {
 108         static struct memcache *cache;
 109
 110         if (!cache
 111             && !(cache = memcache_init(talloc_autofree_context(),
 112                                        lp_max_stat_cache_size()*1024))) {
 113
 114                 smb_panic("Could not init smbd memcache");
 115         }
 116         return cache;
 117 }
 118
 119 /*******************************************************************
 120  What to do when smb.conf is updated.
 121  ********************************************************************/
 122
 123 static void smb_conf_updated(struct messaging_context *msg,
 124                              void *private_data,
 125                              uint32_t msg_type,
 126                              struct server_id server_id,
 127                              DATA_BLOB *data)
 128 {
 129         DEBUG(10,("smb_conf_updated: Got message saying smb.conf was "
 130                   "updated. Reloading.\n"));
 131         reload_services(False);
 132 }
 133
 134
 135 /*******************************************************************
 136  Delete a statcache entry.
 137  ********************************************************************/
 138
 139 static void smb_stat_cache_delete(struct messaging_context *msg,
 140                                   void *private_data,
 141                                   uint32_t msg_tnype,
 142                                   struct server_id server_id,
 143                                   DATA_BLOB *data)
 144 {
 145         const char *name = (const char *)data->data;
 146         DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
 147         stat_cache_delete(name);
 148 }
 149
 150 /****************************************************************************
 151  Terminate signal.
 152 ****************************************************************************/
 153
 154 static void sig_term(void)
 155 {
 156         got_sig_term = 1;
 157         sys_select_signal(SIGTERM);
 158 }
 159
 160 /****************************************************************************
 161  Catch a sighup.
 162 ****************************************************************************/
 163
 164 static void sig_hup(int sig)
 165 {
 166         reload_after_sighup = 1;
 167         sys_select_signal(SIGHUP);
 168 }
 169
 170 /****************************************************************************
 171  Catch a sigcld
 172 ****************************************************************************/
 173 static void sig_cld(int sig)
 174 {
 175         got_sig_cld = 1;
 176         sys_select_signal(SIGCLD);
 177 }
 178
 179 /****************************************************************************
 180   Send a SIGTERM to our process group.
 181 *****************************************************************************/
 182
 183 static void  killkids(void)
 184 {
 185         if(am_parent) kill(0,SIGTERM);
 186 }
 187
 188 /****************************************************************************
 189  Process a sam sync message - not sure whether to do this here or
 190  somewhere else.
 191 ****************************************************************************/
 192
 193 static void msg_sam_sync(struct messaging_context *msg,
 194                          void *private_data,
 195                          uint32_t msg_type,
 196                          struct server_id server_id,
 197                          DATA_BLOB *data)
 198 {
 199         DEBUG(10, ("** sam sync message received, ignoring\n"));
 200 }
 201
 202
 203 /****************************************************************************
 204  Open the socket communication - inetd.
 205 ****************************************************************************/
 206
 207 static bool open_sockets_inetd(void)
 208 {
 209         /* Started from inetd. fd 0 is the socket. */
 210         /* We will abort gracefully when the client or remote system
 211            goes away */
 212         int fd = dup(0);
 213
 214         if (fd < 0 || fd >= FD_SETSIZE) {
 215                 return false;
 216         }
 217
 218         smbd_set_server_fd(fd);
 219
 220         /* close our standard file descriptors */
 221         close_low_fds(False); /* Don't close stderr */
 222
 223         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 224         set_socket_options(smbd_server_fd(), lp_socket_options());
 225
 226         return True;
 227 }
 228
 229 static void msg_exit_server(struct messaging_context *msg,
 230                             void *private_data,
 231                             uint32_t msg_type,
 232                             struct server_id server_id,
 233                             DATA_BLOB *data)
 234 {
 235         DEBUG(3, ("got a SHUTDOWN message\n"));
 236         exit_server_cleanly(NULL);
 237 }
 238
 239 #ifdef DEVELOPER
 240 static void msg_inject_fault(struct messaging_context *msg,
 241                              void *private_data,
 242                              uint32_t msg_type,
 243                              struct server_id src,
 244                              DATA_BLOB *data)
 245 {
 246         int sig;
 247
 248         if (data->length != sizeof(sig)) {
 249
 250                 DEBUG(0, ("Process %s sent bogus signal injection request\n",
 251                           procid_str_static(&src)));
 252                 return;
 253         }
 254
 255         sig = *(int *)data->data;
 256         if (sig == -1) {
 257                 exit_server("internal error injected");
 258                 return;
 259         }
 260
 261 #if HAVE_STRSIGNAL
 262         DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
 263                   procid_str_static(&src), sig, strsignal(sig)));
 264 #else
 265         DEBUG(0, ("Process %s requested injection of signal %d\n",
 266                   procid_str_static(&src), sig));
 267 #endif
 268
 269         kill(sys_getpid(), sig);
 270 }
 271 #endif /* DEVELOPER */
 272
 273 struct child_pid {
 274         struct child_pid *prev, *next;
 275         pid_t pid;
 276 };
 277
 278 static struct child_pid *children;
 279 static int num_children;
 280
 281 static void add_child_pid(pid_t pid)
 282 {
 283         struct child_pid *child;
 284
 285         if (lp_max_smbd_processes() == 0) {
 286                 /* Don't bother with the child list if we don't care anyway */
 287                 return;
 288         }
 289
 290         child = SMB_MALLOC_P(struct child_pid);
 291         if (child == NULL) {
 292                 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
 293                 return;
 294         }
 295         child->pid = pid;
 296         DLIST_ADD(children, child);
 297         num_children += 1;
 298 }
 299
 300 static void remove_child_pid(pid_t pid, bool unclean_shutdown)
 301 {
 302         struct child_pid *child;
 303
 304         if (unclean_shutdown) {
 305                 /* a child terminated uncleanly so tickle all processes to see
 306                    if they can grab any of the pending locks
 307                 */
 308                 DEBUG(3,(__location__ " Unclean shutdown of pid %u\n", (unsigned int)pid));
 309                 messaging_send_buf(smbd_messaging_context(), procid_self(),
 310                                    MSG_SMB_BRL_VALIDATE, NULL, 0);
 311                 message_send_all(smbd_messaging_context(),
 312                                  MSG_SMB_UNLOCK, NULL, 0, NULL);
 313         }
 314
 315         if (lp_max_smbd_processes() == 0) {
 316                 /* Don't bother with the child list if we don't care anyway */
 317                 return;
 318         }
 319
 320         for (child = children; child != NULL; child = child->next) {
 321                 if (child->pid == pid) {
 322                         struct child_pid *tmp = child;
 323                         DLIST_REMOVE(children, child);
 324                         SAFE_FREE(tmp);
 325                         num_children -= 1;
 326                         return;
 327                 }
 328         }
 329
 330         DEBUG(0, ("Could not find child %d -- ignoring\n", (int)pid));
 331 }
 332
 333 /****************************************************************************
 334  Have we reached the process limit ?
 335 ****************************************************************************/
 336
 337 static bool allowable_number_of_smbd_processes(void)
 338 {
 339         int max_processes = lp_max_smbd_processes();
 340
 341         if (!max_processes)
 342                 return True;
 343
 344         return num_children < max_processes;
 345 }
 346
 347 /****************************************************************************
 348  Open the socket communication.
 349 ****************************************************************************/
 350
 351 static bool open_sockets_smbd(bool is_daemon, bool interactive, const char *smb_ports)
 352 {
 353         int num_interfaces = iface_count();
 354         int num_sockets = 0;
 355         int fd_listenset[FD_SETSIZE];
 356         fd_set listen_set;
 357         int s;
 358         int maxfd = 0;
 359         int i;
 360         char *ports;
 361         struct dns_reg_state * dns_reg = NULL;
 362         unsigned dns_port = 0;
 363
 364 #ifdef HAVE_ATEXIT
 365         {
 366                 static int atexit_set;
 367                 if(atexit_set == 0) {
 368                         atexit_set=1;
 369                         atexit(killkids);
 370                 }
 371         }
 372 #endif
 373
 374         if (!is_daemon) {
 375                 /*
 376                  * Stop zombies the old way.
 377                  * We aren't forking any new
 378                  * 'normal' connections when
 379                  * run from [x]inetd.
 380                  */
 381                 CatchChild();
 382                 return open_sockets_inetd();
 383         }
 384
 385         /* Stop zombies */
 386         CatchSignal(SIGCLD, sig_cld);
 387
 388         FD_ZERO(&listen_set);
 389
 390         /* use a reasonable default set of ports - listing on 445 and 139 */
 391         if (!smb_ports) {
 392                 ports = lp_smb_ports();
 393                 if (!ports || !*ports) {
 394                         ports = smb_xstrdup(SMB_PORTS);
 395                 } else {
 396                         ports = smb_xstrdup(ports);
 397                 }
 398         } else {
 399                 ports = smb_xstrdup(smb_ports);
 400         }
 401
 402         if (lp_interfaces() && lp_bind_interfaces_only()) {
 403                 /* We have been given an interfaces line, and been
 404                    told to only bind to those interfaces. Create a
 405                    socket per interface and bind to only these.
 406                 */
 407
 408                 /* Now open a listen socket for each of the
 409                    interfaces. */
 410                 for(i = 0; i < num_interfaces; i++) {
 411                         TALLOC_CTX *frame = NULL;
 412                         const struct sockaddr_storage *ifss =
 413                                         iface_n_sockaddr_storage(i);
 414                         char *tok;
 415                         const char *ptr;
 416
 417                         if (ifss == NULL) {
 418                                 DEBUG(0,("open_sockets_smbd: "
 419                                         "interface %d has NULL IP address !\n",
 420                                         i));
 421                                 continue;
 422                         }
 423
 424                         frame = talloc_stackframe();
 425                         for (ptr=ports;
 426                                         next_token_talloc(frame,&ptr, &tok, " \t,");) {
 427                                 unsigned port = atoi(tok);
 428                                 if (port == 0 || port > 0xffff) {
 429                                         continue;
 430                                 }
 431
 432                                 /* Keep the first port for mDNS service
 433                                  * registration.
 434                                  */
 435                                 if (dns_port == 0) {
 436                                         dns_port = port;
 437                                 }
 438
 439                                 s = fd_listenset[num_sockets] =
 440                                         open_socket_in(SOCK_STREAM,
 441                                                         port,
 442                                                         num_sockets == 0 ? 0 : 2,
 443                                                         ifss,
 444                                                         true);
 445                                 if(s < 0 || s >= FD_SETSIZE) {
 446                                         close(s);
 447                                         continue;
 448                                 }
 449
 450                                 /* ready to listen */
 451                                 set_socket_options(s,"SO_KEEPALIVE");
 452                                 set_socket_options(s,lp_socket_options());
 453
 454                                 /* Set server socket to
 455                                  * non-blocking for the accept. */
 456                                 set_blocking(s,False);
 457
 458                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 459                                         DEBUG(0,("open_sockets_smbd: listen: "
 460                                                 "%s\n", strerror(errno)));
 461                                         close(s);
 462                                         TALLOC_FREE(frame);
 463                                         return False;
 464                                 }
 465                                 FD_SET(s,&listen_set);
 466                                 maxfd = MAX( maxfd, s);
 467
 468                                 num_sockets++;
 469                                 if (num_sockets >= FD_SETSIZE) {
 470                                         DEBUG(0,("open_sockets_smbd: Too "
 471                                                 "many sockets to bind to\n"));
 472                                         TALLOC_FREE(frame);
 473                                         return False;
 474                                 }
 475                         }
 476                         TALLOC_FREE(frame);
 477                 }
 478         } else {
 479                 /* Just bind to 0.0.0.0 - accept connections
 480                    from anywhere. */
 481
 482                 TALLOC_CTX *frame = talloc_stackframe();
 483                 char *tok;
 484                 const char *ptr;
 485                 const char *sock_addr = lp_socket_address();
 486                 char *sock_tok;
 487                 const char *sock_ptr;
 488
 489                 if (strequal(sock_addr, "0.0.0.0") ||
 490                     strequal(sock_addr, "::")) {
 491 #if HAVE_IPV6
 492                         sock_addr = "::,0.0.0.0";
 493 #else
 494                         sock_addr = "0.0.0.0";
 495 #endif
 496                 }
 497
 498                 for (sock_ptr=sock_addr;
 499                                 next_token_talloc(frame, &sock_ptr, &sock_tok, " \t,"); ) {
 500                         for (ptr=ports; next_token_talloc(frame, &ptr, &tok, " \t,"); ) {
 501                                 struct sockaddr_storage ss;
 502
 503                                 unsigned port = atoi(tok);
 504                                 if (port == 0 || port > 0xffff) {
 505                                         continue;
 506                                 }
 507
 508                                 /* Keep the first port for mDNS service
 509                                  * registration.
 510                                  */
 511                                 if (dns_port == 0) {
 512                                         dns_port = port;
 513                                 }
 514
 515                                 /* open an incoming socket */
 516                                 if (!interpret_string_addr(&ss, sock_tok,
 517                                                 AI_NUMERICHOST|AI_PASSIVE)) {
 518                                         continue;
 519                                 }
 520
 521                                 s = open_socket_in(SOCK_STREAM,
 522                                                 port,
 523                                                 num_sockets == 0 ? 0 : 2,
 524                                                 &ss,
 525                                                 true);
 526                                 if (s < 0 || s >= FD_SETSIZE) {
 527                                         continue;
 528                                 }
 529
 530                                 /* ready to listen */
 531                                 set_socket_options(s,"SO_KEEPALIVE");
 532                                 set_socket_options(s,lp_socket_options());
 533
 534                                 /* Set server socket to non-blocking
 535                                  * for the accept. */
 536                                 set_blocking(s,False);
 537
 538                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 539                                         DEBUG(0,("open_sockets_smbd: "
 540                                                 "listen: %s\n",
 541                                                  strerror(errno)));
 542                                         close(s);
 543                                         TALLOC_FREE(frame);
 544                                         return False;
 545                                 }
 546
 547                                 fd_listenset[num_sockets] = s;
 548                                 FD_SET(s,&listen_set);
 549                                 maxfd = MAX( maxfd, s);
 550
 551                                 num_sockets++;
 552
 553                                 if (num_sockets >= FD_SETSIZE) {
 554                                         DEBUG(0,("open_sockets_smbd: Too "
 555                                                 "many sockets to bind to\n"));
 556                                         TALLOC_FREE(frame);
 557                                         return False;
 558                                 }
 559                         }
 560                 }
 561                 TALLOC_FREE(frame);
 562         }
 563
 564         SAFE_FREE(ports);
 565
 566         if (num_sockets == 0) {
 567                 DEBUG(0,("open_sockets_smbd: No "
 568                         "sockets available to bind to.\n"));
 569                 return false;
 570         }
 571
 572         /* Setup the main smbd so that we can get messages. Note that
 573            do this after starting listening. This is needed as when in
 574            clustered mode, ctdb won't allow us to start doing database
 575            operations until it has gone thru a full startup, which
 576            includes checking to see that smbd is listening. */
 577         claim_connection(NULL,"",
 578                          FLAG_MSG_GENERAL|FLAG_MSG_SMBD|FLAG_MSG_DBWRAP);
 579
 580         /* Listen to messages */
 581
 582         messaging_register(smbd_messaging_context(), NULL,
 583                            MSG_SMB_SAM_SYNC, msg_sam_sync);
 584         messaging_register(smbd_messaging_context(), NULL,
 585                            MSG_SHUTDOWN, msg_exit_server);
 586         messaging_register(smbd_messaging_context(), NULL,
 587                            MSG_SMB_FILE_RENAME, msg_file_was_renamed);
 588         messaging_register(smbd_messaging_context(), NULL,
 589                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 590         messaging_register(smbd_messaging_context(), NULL,
 591                            MSG_SMB_STAT_CACHE_DELETE, smb_stat_cache_delete);
 592         brl_register_msgs(smbd_messaging_context());
 593
 594 #ifdef CLUSTER_SUPPORT
 595         if (lp_clustering()) {
 596                 ctdbd_register_reconfigure(messaging_ctdbd_connection());
 597         }
 598 #endif
 599
 600 #ifdef DEVELOPER
 601         messaging_register(smbd_messaging_context(), NULL,
 602                            MSG_SMB_INJECT_FAULT, msg_inject_fault);
 603 #endif
 604
 605         /* Kick off our mDNS registration. */
 606         if (dns_port != 0) {
 607 #ifdef WITH_AVAHI_SUPPORT
 608                 void *avahi_conn;
 609                 avahi_conn = avahi_start_register(
 610                         smbd_event_context(), smbd_event_context(),
 611                         dns_port);
 612                 if (avahi_conn == NULL) {
 613                         DEBUG(10, ("avahi_start_register failed\n"));
 614                 }
 615 #endif
 616         }
 617
 618         /* now accept incoming connections - forking a new process
 619            for each incoming connection */
 620         DEBUG(2,("waiting for a connection\n"));
 621         while (1) {
 622                 struct timeval now, idle_timeout;
 623                 fd_set r_fds, w_fds;
 624                 int num;
 625
 626                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 627                 message_dispatch(smbd_messaging_context());
 628
 629                 if (got_sig_cld) {
 630                         pid_t pid;
 631                         int status;
 632
 633                         got_sig_cld = False;
 634
 635                         while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
 636                                 bool unclean_shutdown = False;
 637
 638                                 /* If the child terminated normally, assume
 639                                    it was an unclean shutdown unless the
 640                                    status is 0
 641                                 */
 642                                 if (WIFEXITED(status)) {
 643                                         unclean_shutdown = WEXITSTATUS(status);
 644                                 }
 645                                 /* If the child terminated due to a signal
 646                                    we always assume it was unclean.
 647                                 */
 648                                 if (WIFSIGNALED(status)) {
 649                                         unclean_shutdown = True;
 650                                 }
 651                                 remove_child_pid(pid, unclean_shutdown);
 652                         }
 653                 }
 654
 655                 idle_timeout = timeval_zero();
 656
 657                 memcpy((char *)&r_fds, (char *)&listen_set,
 658                        sizeof(listen_set));
 659                 FD_ZERO(&w_fds);
 660                 GetTimeOfDay(&now);
 661
 662                 /* Kick off our mDNS registration. */
 663                 if (dns_port != 0) {
 664                         dns_register_smbd(&dns_reg, dns_port, &maxfd,
 665                                         &r_fds, &idle_timeout);
 666                 }
 667
 668                 event_add_to_select_args(smbd_event_context(), &now,
 669                                          &r_fds, &w_fds, &idle_timeout,
 670                                          &maxfd);
 671
 672                 num = sys_select(maxfd+1,&r_fds,&w_fds,NULL,
 673                                  timeval_is_zero(&idle_timeout) ?
 674                                  NULL : &idle_timeout);
 675
 676                 if (num == -1 && errno == EINTR) {
 677                         if (got_sig_term) {
 678                                 exit_server_cleanly(NULL);
 679                         }
 680
 681                         /* check for sighup processing */
 682                         if (reload_after_sighup) {
 683                                 change_to_root_user();
 684                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 685                                 reload_services(False);
 686                                 reload_after_sighup = 0;
 687                         }
 688
 689                         continue;
 690                 }
 691
 692
 693                 /* If the idle timeout fired and we don't have any connected
 694                  * users, exit gracefully. We should be running under a process
 695                  * controller that will restart us if necessry.
 696                  */
 697                 if (num == 0 && count_all_current_connections() == 0) {
 698                         exit_server_cleanly("idle timeout");
 699                 }
 700
 701                 /* process pending nDNS responses */
 702                 if (dns_register_smbd_reply(dns_reg, &r_fds, &idle_timeout)) {
 703                         --num;
 704                 }
 705
 706                 if (run_events(smbd_event_context(), num, &r_fds, &w_fds)) {
 707                         continue;
 708                 }
 709
 710                 /* check if we need to reload services */
 711                 check_reload(time(NULL));
 712
 713                 /* Find the sockets that are read-ready -
 714                    accept on these. */
 715                 for( ; num > 0; num--) {
 716                         struct sockaddr addr;
 717                         socklen_t in_addrlen = sizeof(addr);
 718                         pid_t child = 0;
 719                         int fd;
 720
 721                         s = -1;
 722                         for(i = 0; i < num_sockets; i++) {
 723                                 if(FD_ISSET(fd_listenset[i],&r_fds)) {
 724                                         s = fd_listenset[i];
 725                                         /* Clear this so we don't look
 726                                            at it again. */
 727                                         FD_CLR(fd_listenset[i],&r_fds);
 728                                         break;
 729                                 }
 730                         }
 731
 732                         fd = accept(s,&addr,&in_addrlen);
 733                         if (fd == -1 && errno == EINTR)
 734                                 continue;
 735                         if (fd == -1) {
 736                                 DEBUG(2,("open_sockets_smbd: accept: %s\n",
 737                                          strerror(errno)));
 738                                 continue;
 739                         }
 740                         if (fd < 0 || fd >= FD_SETSIZE) {
 741                                 DEBUG(2,("open_sockets_smbd: bad fd %d\n",
 742                                         fd ));
 743                                 continue;
 744                         }
 745
 746                         smbd_set_server_fd(fd);
 747
 748                         /* Ensure child is set to blocking mode */
 749                         set_blocking(smbd_server_fd(),True);
 750
 751                         if (smbd_server_fd() != -1 && interactive)
 752                                 return True;
 753
 754                         if (allowable_number_of_smbd_processes() &&
 755                             smbd_server_fd() != -1 &&
 756                             ((child = sys_fork())==0)) {
 757                                 char remaddr[INET6_ADDRSTRLEN];
 758
 759                                 /* Child code ... */
 760
 761                                 /* Stop zombies, the parent explicitly handles
 762                                  * them, counting worker smbds. */
 763                                 CatchChild();
 764
 765                                 /* close the listening socket(s) */
 766                                 for(i = 0; i < num_sockets; i++)
 767                                         close(fd_listenset[i]);
 768
 769                                 /* close our mDNS daemon handle */
 770                                 dns_register_close(&dns_reg);
 771
 772                                 /* close our standard file
 773                                    descriptors */
 774                                 close_low_fds(False);
 775                                 am_parent = 0;
 776
 777                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 778                                 set_socket_options(smbd_server_fd(),
 779                                                    lp_socket_options());
 780
 781                                 /* this is needed so that we get decent entries
 782                                    in smbstatus for port 445 connects */
 783                                 set_remote_machine_name(get_peer_addr(smbd_server_fd(),
 784                                                                 remaddr,
 785                                                                 sizeof(remaddr)),
 786                                                                 false);
 787
 788                                 if (!reinit_after_fork(
 789                                             smbd_messaging_context(),
 790                                             smbd_event_context(),
 791                                             true)) {
 792                                         DEBUG(0,("reinit_after_fork() failed\n"));
 793                                         smb_panic("reinit_after_fork() failed");
 794                                 }
 795
 796                                 return True;
 797                         }
 798                         /* The parent doesn't need this socket */
 799                         close(smbd_server_fd());
 800
 801                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 802                                 Clear the closed fd info out of server_fd --
 803                                 and more importantly, out of client_fd in
 804                                 util_sock.c, to avoid a possible
 805                                 getpeername failure if we reopen the logs
 806                                 and use %I in the filename.
 807                         */
 808
 809                         smbd_set_server_fd(-1);
 810
 811                         if (child != 0) {
 812                                 add_child_pid(child);
 813                         }
 814
 815                         /* Force parent to check log size after
 816                          * spawning child.  Fix from
 817                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 818                          * parent smbd will log to logserver.smb.  It
 819                          * writes only two messages for each child
 820                          * started/finished. But each child writes,
 821                          * say, 50 messages also in logserver.smb,
 822                          * begining with the debug_count of the
 823                          * parent, before the child opens its own log
 824                          * file logserver.client. In a worst case
 825                          * scenario the size of logserver.smb would be
 826                          * checked after about 50*50=2500 messages
 827                          * (ca. 100kb).
 828                          * */
 829                         force_check_log_size();
 830
 831                 } /* end for num */
 832         } /* end while 1 */
 833
 834 /* NOTREACHED   return True; */
 835 }
 836
 837 /****************************************************************************
 838  Reload printers
 839 **************************************************************************/
 840 void reload_printers(void)
 841 {
 842         int snum;
 843         int n_services = lp_numservices();
 844         int pnum = lp_servicenumber(PRINTERS_NAME);
 845         const char *pname;
 846
 847         pcap_cache_reload();
 848
 849         /* remove stale printers */
 850         for (snum = 0; snum < n_services; snum++) {
 851                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 852                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 853                                       lp_autoloaded(snum)))
 854                         continue;
 855
 856                 pname = lp_printername(snum);
 857                 if (!pcap_printername_ok(pname)) {
 858                         DEBUG(3, ("removing stale printer %s\n", pname));
 859
 860                         if (is_printer_published(NULL, snum, NULL))
 861                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 862                         del_a_printer(pname);
 863                         lp_killservice(snum);
 864                 }
 865         }
 866
 867         load_printers();
 868 }
 869
 870 /****************************************************************************
 871  Reload the services file.
 872 **************************************************************************/
 873
 874 bool reload_services(bool test)
 875 {
 876         bool ret;
 877
 878         if (lp_loaded()) {
 879                 char *fname = lp_configfile();
 880                 if (file_exist(fname, NULL) &&
 881                     !strcsequal(fname, get_dyn_CONFIGFILE())) {
 882                         set_dyn_CONFIGFILE(fname);
 883                         test = False;
 884                 }
 885         }
 886
 887         reopen_logs();
 888
 889         if (test && !lp_file_list_changed())
 890                 return(True);
 891
 892         lp_killunused(conn_snum_used);
 893
 894         ret = lp_load(get_dyn_CONFIGFILE(), False, False, True, True);
 895
 896         reload_printers();
 897
 898         /* perhaps the config filename is now set */
 899         if (!test)
 900                 reload_services(True);
 901
 902         reopen_logs();
 903
 904         load_interfaces();
 905
 906         if (smbd_server_fd() != -1) {
 907                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 908                 set_socket_options(smbd_server_fd(), lp_socket_options());
 909         }
 910
 911         mangle_reset_cache();
 912         reset_stat_cache();
 913
 914         /* this forces service parameters to be flushed */
 915         set_current_service(NULL,0,True);
 916
 917         return(ret);
 918 }
 919
 920 /****************************************************************************
 921  Exit the server.
 922 ****************************************************************************/
 923
 924 /* Reasons for shutting down a server process. */
 925 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
 926
 927 static void exit_server_common(enum server_exit_reason how,
 928         const char *const reason) NORETURN_ATTRIBUTE;
 929
 930 static void exit_server_common(enum server_exit_reason how,
 931         const char *const reason)
 932 {
 933         static int firsttime=1;
 934         bool had_open_conn;
 935
 936         if (!firsttime)
 937                 exit(0);
 938         firsttime = 0;
 939
 940         change_to_root_user();
 941
 942         if (negprot_global_auth_context) {
 943                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 944         }
 945
 946         had_open_conn = conn_close_all();
 947
 948         invalidate_all_vuids();
 949
 950         /* 3 second timeout. */
 951         print_notify_send_messages(smbd_messaging_context(), 3);
 952
 953         /* delete our entry in the connections database. */
 954         yield_connection(NULL,"");
 955
 956         respond_to_all_remaining_local_messages();
 957
 958 #ifdef WITH_DFS
 959         if (dcelogin_atmost_once) {
 960                 dfs_unlogin();
 961         }
 962 #endif
 963
 964 #ifdef USE_DMAPI
 965         /* Destroy Samba DMAPI session only if we are master smbd process */
 966         if (am_parent) {
 967                 if (!dmapi_destroy_session()) {
 968                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 969                 }
 970         }
 971 #endif
 972
 973         locking_end();
 974         printing_end();
 975
 976         if (how != SERVER_EXIT_NORMAL) {
 977                 int oldlevel = DEBUGLEVEL;
 978
 979                 DEBUGLEVEL = 10;
 980
 981                 DEBUGSEP(0);
 982                 DEBUG(0,("Abnormal server exit: %s\n",
 983                         reason ? reason : "no explanation provided"));
 984                 DEBUGSEP(0);
 985
 986                 log_stack_trace();
 987
 988                 DEBUGLEVEL = oldlevel;
 989                 dump_core();
 990
 991         } else {
 992                 DEBUG(3,("Server exit (%s)\n",
 993                         (reason ? reason : "normal exit")));
 994         }
 995
 996         /* if we had any open SMB connections when we exited then we
 997            need to tell the parent smbd so that it can trigger a retry
 998            of any locks we may have been holding or open files we were
 999            blocking */
1000         if (had_open_conn) {
1001                 exit(1);
1002         } else {
1003                 exit(0);
1004         }
1005 }
1006
1007 void exit_server(const char *const explanation)
1008 {
1009         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
1010 }
1011
1012 void exit_server_cleanly(const char *const explanation)
1013 {
1014         exit_server_common(SERVER_EXIT_NORMAL, explanation);
1015 }
1016
1017 void exit_server_fault(void)
1018 {
1019         exit_server("critical server fault");
1020 }
1021
1022
1023 /****************************************************************************
1024 received when we should release a specific IP
1025 ****************************************************************************/
1026 static void release_ip(const char *ip, void *priv)
1027 {
1028         char addr[INET6_ADDRSTRLEN];
1029
1030         if (strcmp(client_socket_addr(get_client_fd(),addr,sizeof(addr)), ip) == 0) {
1031                 /* we can't afford to do a clean exit - that involves
1032                    database writes, which would potentially mean we
1033                    are still running after the failover has finished -
1034                    we have to get rid of this process ID straight
1035                    away */
1036                 DEBUG(0,("Got release IP message for our IP %s - exiting immediately\n",
1037                         ip));
1038                 /* note we must exit with non-zero status so the unclean handler gets
1039                    called in the parent, so that the brl database is tickled */
1040                 _exit(1);
1041         }
1042 }
1043
1044 static void msg_release_ip(struct messaging_context *msg_ctx, void *private_data,
1045                            uint32_t msg_type, struct server_id server_id, DATA_BLOB *data)
1046 {
1047         release_ip((char *)data->data, NULL);
1048 }
1049
1050 /****************************************************************************
1051  Initialise connect, service and file structs.
1052 ****************************************************************************/
1053
1054 static bool init_structs(void )
1055 {
1056         /*
1057          * Set the machine NETBIOS name if not already
1058          * set from the config file.
1059          */
1060
1061         if (!init_names())
1062                 return False;
1063
1064         conn_init();
1065
1066         file_init();
1067
1068         /* for RPC pipes */
1069         init_rpc_pipe_hnd();
1070
1071         init_dptrs();
1072
1073         if (!secrets_init())
1074                 return False;
1075
1076         return True;
1077 }
1078
1079 /*
1080  * Send keepalive packets to our client
1081  */
1082 static bool keepalive_fn(const struct timeval *now, void *private_data)
1083 {
1084         if (!send_keepalive(smbd_server_fd())) {
1085                 DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
1086                 return False;
1087         }
1088         return True;
1089 }
1090
1091 /*
1092  * Do the recurring check if we're idle
1093  */
1094 static bool deadtime_fn(const struct timeval *now, void *private_data)
1095 {
1096         if ((conn_num_open() == 0)
1097             || (conn_idle_all(now->tv_sec))) {
1098                 DEBUG( 2, ( "Closing idle connection\n" ) );
1099                 messaging_send(smbd_messaging_context(), procid_self(),
1100                                MSG_SHUTDOWN, &data_blob_null);
1101                 return False;
1102         }
1103
1104         return True;
1105 }
1106
1107 /*
1108  * Do the recurring log file and smb.conf reload checks.
1109  */
1110
1111 static bool housekeeping_fn(const struct timeval *now, void *private_data)
1112 {
1113         change_to_root_user();
1114
1115         /* update printer queue caches if necessary */
1116         update_monitored_printq_cache();
1117
1118         /* check if we need to reload services */
1119         check_reload(time(NULL));
1120
1121         /* Change machine password if neccessary. */
1122         attempt_machine_password_change();
1123
1124         /*
1125          * Force a log file check.
1126          */
1127         force_check_log_size();
1128         check_log_size();
1129         return true;
1130 }
1131
1132 /****************************************************************************
1133  main program.
1134 ****************************************************************************/
1135
1136 /* Declare prototype for build_options() to avoid having to run it through
1137    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
1138    prototype generation system is too complicated. */
1139
1140 extern void build_options(bool screen);
1141
1142  int main(int argc,const char *argv[])
1143 {
1144         /* shall I run as a daemon */
1145         static bool is_daemon = False;
1146         static bool interactive = False;
1147         static bool Fork = True;
1148         static bool no_process_group = False;
1149         static bool log_stdout = False;
1150         static char *ports = NULL;
1151         static char *profile_level = NULL;
1152         int opt;
1153         poptContext pc;
1154         bool print_build_options = False;
1155         enum {
1156                 OPT_DAEMON = 1000,
1157                 OPT_INTERACTIVE,
1158                 OPT_FORK,
1159                 OPT_NO_PROCESS_GROUP,
1160                 OPT_LOG_STDOUT
1161         };
1162         struct poptOption long_options[] = {
1163         POPT_AUTOHELP
1164         {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1165         {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1166         {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1167         {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1168         {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1169         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1170         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1171         {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1172         POPT_COMMON_SAMBA
1173         POPT_COMMON_DYNCONFIG
1174         POPT_TABLEEND
1175         };
1176         TALLOC_CTX *frame = talloc_stackframe(); /* Setup tos. */
1177
1178         TimeInit();
1179
1180 #ifdef HAVE_SET_AUTH_PARAMETERS
1181         set_auth_parameters(argc,argv);
1182 #endif
1183
1184         pc = poptGetContext("smbd", argc, argv, long_options, 0);
1185         while((opt = poptGetNextOpt(pc)) != -1) {
1186                 switch (opt)  {
1187                 case OPT_DAEMON:
1188                         is_daemon = true;
1189                         break;
1190                 case OPT_INTERACTIVE:
1191                         interactive = true;
1192                         break;
1193                 case OPT_FORK:
1194                         Fork = false;
1195                         break;
1196                 case OPT_NO_PROCESS_GROUP:
1197                         no_process_group = true;
1198                         break;
1199                 case OPT_LOG_STDOUT:
1200                         log_stdout = true;
1201                         break;
1202                 case 'b':
1203                         print_build_options = True;
1204                         break;
1205                 default:
1206                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1207                                   poptBadOption(pc, 0), poptStrerror(opt));
1208                         poptPrintUsage(pc, stderr, 0);
1209                         exit(1);
1210                 }
1211         }
1212         poptFreeContext(pc);
1213
1214         if (interactive) {
1215                 Fork = False;
1216                 log_stdout = True;
1217         }
1218
1219         setup_logging(argv[0],log_stdout);
1220
1221         if (print_build_options) {
1222                 build_options(True); /* Display output to screen as well as debug */
1223                 exit(0);
1224         }
1225
1226         load_case_tables();
1227
1228 #ifdef HAVE_SETLUID
1229         /* needed for SecureWare on SCO */
1230         setluid(0);
1231 #endif
1232
1233         sec_init();
1234
1235         set_remote_machine_name("smbd", False);
1236
1237         if (interactive && (DEBUGLEVEL >= 9)) {
1238                 talloc_enable_leak_report();
1239         }
1240
1241         if (log_stdout && Fork) {
1242                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1243                 exit(1);
1244         }
1245
1246         /* we want to re-seed early to prevent time delays causing
1247            client problems at a later date. (tridge) */
1248         generate_random_buffer(NULL, 0);
1249
1250         /* make absolutely sure we run as root - to handle cases where people
1251            are crazy enough to have it setuid */
1252
1253         gain_root_privilege();
1254         gain_root_group_privilege();
1255
1256         fault_setup((void (*)(void *))exit_server_fault);
1257         dump_core_setup("smbd");
1258
1259         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
1260         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
1261
1262         /* we are never interested in SIGPIPE */
1263         BlockSignals(True,SIGPIPE);
1264
1265 #if defined(SIGFPE)
1266         /* we are never interested in SIGFPE */
1267         BlockSignals(True,SIGFPE);
1268 #endif
1269
1270 #if defined(SIGUSR2)
1271         /* We are no longer interested in USR2 */
1272         BlockSignals(True,SIGUSR2);
1273 #endif
1274
1275         /* POSIX demands that signals are inherited. If the invoking process has
1276          * these signals masked, we will have problems, as we won't recieve them. */
1277         BlockSignals(False, SIGHUP);
1278         BlockSignals(False, SIGUSR1);
1279         BlockSignals(False, SIGTERM);
1280
1281         /* Ensure we leave no zombies until we
1282          * correctly set up child handling below. */
1283         CatchChild();
1284
1285         /* we want total control over the permissions on created files,
1286            so set our umask to 0 */
1287         umask(0);
1288
1289         init_sec_ctx();
1290
1291         reopen_logs();
1292
1293         DEBUG(0,("smbd version %s started.\n", SAMBA_VERSION_STRING));
1294         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1295
1296         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1297                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1298
1299         /* Output the build options to the debug log */
1300         build_options(False);
1301
1302         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
1303                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1304                 exit(1);
1305         }
1306
1307         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1308                 DEBUG(0, ("error opening config file\n"));
1309                 exit(1);
1310         }
1311
1312         if (smbd_messaging_context() == NULL)
1313                 exit(1);
1314
1315         if (!reload_services(False))
1316                 return(-1);
1317
1318         init_structs();
1319
1320 #ifdef WITH_PROFILE
1321         if (!profile_setup(smbd_messaging_context(), False)) {
1322                 DEBUG(0,("ERROR: failed to setup profiling\n"));
1323                 return -1;
1324         }
1325         if (profile_level != NULL) {
1326                 int pl = atoi(profile_level);
1327                 struct server_id src;
1328
1329                 DEBUG(1, ("setting profiling level: %s\n",profile_level));
1330                 src.pid = getpid();
1331                 set_profile_level(pl, src);
1332         }
1333 #endif
1334
1335         DEBUG(3,( "loaded services\n"));
1336
1337         if (!is_daemon && !is_a_socket(0)) {
1338                 if (!interactive)
1339                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
1340
1341                 /*
1342                  * Setting is_daemon here prevents us from eventually calling
1343                  * the open_sockets_inetd()
1344                  */
1345
1346                 is_daemon = True;
1347         }
1348
1349         if (is_daemon && !interactive) {
1350                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
1351                 become_daemon(Fork, no_process_group);
1352         }
1353
1354 #if HAVE_SETPGID
1355         /*
1356          * If we're interactive we want to set our own process group for
1357          * signal management.
1358          */
1359         if (interactive && !no_process_group)
1360                 setpgid( (pid_t)0, (pid_t)0);
1361 #endif
1362
1363         if (!directory_exist(lp_lockdir(), NULL))
1364                 mkdir(lp_lockdir(), 0755);
1365
1366         if (is_daemon)
1367                 pidfile_create("smbd");
1368
1369         if (!reinit_after_fork(smbd_messaging_context(),
1370                                smbd_event_context(), false)) {
1371                 DEBUG(0,("reinit_after_fork() failed\n"));
1372                 exit(1);
1373         }
1374
1375         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1376
1377         if (smbd_memcache() == NULL) {
1378                 exit(1);
1379         }
1380
1381         memcache_set_global(smbd_memcache());
1382
1383         /* Initialise the password backed before the global_sam_sid
1384            to ensure that we fetch from ldap before we make a domain sid up */
1385
1386         if(!initialize_password_db(False, smbd_event_context()))
1387                 exit(1);
1388
1389         if (!secrets_init()) {
1390                 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
1391                 exit(1);
1392         }
1393
1394         if(!get_global_sam_sid()) {
1395                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
1396                 exit(1);
1397         }
1398
1399         if (!session_init())
1400                 exit(1);
1401
1402         if (!connections_init(True))
1403                 exit(1);
1404
1405         if (!locking_init())
1406                 exit(1);
1407
1408         namecache_enable();
1409
1410         if (!W_ERROR_IS_OK(registry_init_full()))
1411                 exit(1);
1412
1413 #if 0
1414         if (!init_svcctl_db())
1415                 exit(1);
1416 #endif
1417
1418         if (!print_backend_init(smbd_messaging_context()))
1419                 exit(1);
1420
1421         if (!init_guest_info()) {
1422                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1423                 return -1;
1424         }
1425
1426         /* only start the background queue daemon if we are
1427            running as a daemon -- bad things will happen if
1428            smbd is launched via inetd and we fork a copy of
1429            ourselves here */
1430
1431         if (is_daemon && !interactive
1432             && lp_parm_bool(-1, "smbd", "backgroundqueue", true)) {
1433                 start_background_queue();
1434         }
1435
1436         if (!open_sockets_smbd(is_daemon, interactive, ports))
1437                 exit(1);
1438
1439         /*
1440          * everything after this point is run after the fork()
1441          */
1442
1443         static_init_rpc;
1444
1445         init_modules();
1446
1447         /* Possibly reload the services file. Only worth doing in
1448          * daemon mode. In inetd mode, we know we only just loaded this.
1449          */
1450         if (is_daemon) {
1451                 reload_services(True);
1452         }
1453
1454         if (!init_account_policy()) {
1455                 DEBUG(0,("Could not open account policy tdb.\n"));
1456                 exit(1);
1457         }
1458
1459         if (*lp_rootdir()) {
1460                 if (sys_chroot(lp_rootdir()) != 0) {
1461                         DEBUG(0,("Failed to change root to %s\n", lp_rootdir()));
1462                         exit(1);
1463                 }
1464                 if (chdir("/") == -1) {
1465                         DEBUG(0,("Failed to chdir to / on chroot to %s\n", lp_rootdir()));
1466                         exit(1);
1467                 }
1468                 DEBUG(0,("Changed root to %s\n", lp_rootdir()));
1469         }
1470
1471         /* Setup oplocks */
1472         if (!init_oplocks(smbd_messaging_context()))
1473                 exit(1);
1474
1475         /* Setup aio signal handler. */
1476         initialize_async_io_handler();
1477
1478         /* register our message handlers */
1479         messaging_register(smbd_messaging_context(), NULL,
1480                            MSG_SMB_FORCE_TDIS, msg_force_tdis);
1481         messaging_register(smbd_messaging_context(), NULL,
1482                            MSG_SMB_RELEASE_IP, msg_release_ip);
1483         messaging_register(smbd_messaging_context(), NULL,
1484                            MSG_SMB_CLOSE_FILE, msg_close_file);
1485
1486         if ((lp_keepalive() != 0)
1487             && !(event_add_idle(smbd_event_context(), NULL,
1488                                 timeval_set(lp_keepalive(), 0),
1489                                 "keepalive", keepalive_fn,
1490                                 NULL))) {
1491                 DEBUG(0, ("Could not add keepalive event\n"));
1492                 exit(1);
1493         }
1494
1495         if (!(event_add_idle(smbd_event_context(), NULL,
1496                              timeval_set(IDLE_CLOSED_TIMEOUT, 0),
1497                              "deadtime", deadtime_fn, NULL))) {
1498                 DEBUG(0, ("Could not add deadtime event\n"));
1499                 exit(1);
1500         }
1501
1502         if (!(event_add_idle(smbd_event_context(), NULL,
1503                              timeval_set(SMBD_SELECT_TIMEOUT, 0),
1504                              "housekeeping", housekeeping_fn, NULL))) {
1505                 DEBUG(0, ("Could not add housekeeping event\n"));
1506                 exit(1);
1507         }
1508
1509 #ifdef CLUSTER_SUPPORT
1510
1511         if (lp_clustering()) {
1512                 /*
1513                  * We need to tell ctdb about our client's TCP
1514                  * connection, so that for failover ctdbd can send
1515                  * tickle acks, triggering a reconnection by the
1516                  * client.
1517                  */
1518
1519                 struct sockaddr_storage srv, clnt;
1520
1521                 if (client_get_tcp_info(&srv, &clnt) == 0) {
1522
1523                         NTSTATUS status;
1524
1525                         status = ctdbd_register_ips(
1526                                 messaging_ctdbd_connection(),
1527                                 &srv, &clnt, release_ip, NULL);
1528
1529                         if (!NT_STATUS_IS_OK(status)) {
1530                                 DEBUG(0, ("ctdbd_register_ips failed: %s\n",
1531                                           nt_errstr(status)));
1532                         }
1533                 } else
1534                 {
1535                         DEBUG(0,("Unable to get tcp info for "
1536                                  "CTDB_CONTROL_TCP_CLIENT: %s\n",
1537                                  strerror(errno)));
1538                 }
1539         }
1540
1541 #endif
1542
1543         TALLOC_FREE(frame);
1544
1545         smbd_process();
1546
1547         namecache_shutdown();
1548
1549         exit_server_cleanly(NULL);
1550         return(0);
1551 }