source3/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 static int client_get_tcp_info(struct sockaddr_storage *server,
  63                                struct sockaddr_storage *client)
  64 {
  65         socklen_t length;
  66         if (server_fd == -1) {
  67                 return -1;
  68         }
  69         length = sizeof(*server);
  70         if (getsockname(server_fd, (struct sockaddr *)server, &length) != 0) {
  71                 return -1;
  72         }
  73         length = sizeof(*client);
  74         if (getpeername(server_fd, (struct sockaddr *)client, &length) != 0) {
  75                 return -1;
  76         }
  77         return 0;
  78 }
  79
  80 struct event_context *smbd_event_context(void)
  81 {
  82         static struct event_context *ctx;
  83
  84         if (!ctx && !(ctx = event_context_init(talloc_autofree_context()))) {
  85                 smb_panic("Could not init smbd event context");
  86         }
  87         return ctx;
  88 }
  89
  90 struct messaging_context *smbd_messaging_context(void)
  91 {
  92         static struct messaging_context *ctx;
  93
  94         if (ctx == NULL) {
  95                 ctx = messaging_init(talloc_autofree_context(), server_id_self(),
  96                                      smbd_event_context());
  97         }
  98         if (ctx == NULL) {
  99                 DEBUG(0, ("Could not init smbd messaging context.\n"));
 100         }
 101         return ctx;
 102 }
 103
 104 struct memcache *smbd_memcache(void)
 105 {
 106         static struct memcache *cache;
 107
 108         if (!cache
 109             && !(cache = memcache_init(talloc_autofree_context(),
 110                                        lp_max_stat_cache_size()*1024))) {
 111
 112                 smb_panic("Could not init smbd memcache");
 113         }
 114         return cache;
 115 }
 116
 117 /*******************************************************************
 118  What to do when smb.conf is updated.
 119  ********************************************************************/
 120
 121 static void smb_conf_updated(struct messaging_context *msg,
 122                              void *private_data,
 123                              uint32_t msg_type,
 124                              struct server_id server_id,
 125                              DATA_BLOB *data)
 126 {
 127         DEBUG(10,("smb_conf_updated: Got message saying smb.conf was "
 128                   "updated. Reloading.\n"));
 129         reload_services(False);
 130 }
 131
 132
 133 /*******************************************************************
 134  Delete a statcache entry.
 135  ********************************************************************/
 136
 137 static void smb_stat_cache_delete(struct messaging_context *msg,
 138                                   void *private_data,
 139                                   uint32_t msg_tnype,
 140                                   struct server_id server_id,
 141                                   DATA_BLOB *data)
 142 {
 143         const char *name = (const char *)data->data;
 144         DEBUG(10,("smb_stat_cache_delete: delete name %s\n", name));
 145         stat_cache_delete(name);
 146 }
 147
 148 /****************************************************************************
 149  Terminate signal.
 150 ****************************************************************************/
 151
 152 static void sig_term(void)
 153 {
 154         got_sig_term = 1;
 155         sys_select_signal(SIGTERM);
 156 }
 157
 158 /****************************************************************************
 159  Catch a sighup.
 160 ****************************************************************************/
 161
 162 static void sig_hup(int sig)
 163 {
 164         reload_after_sighup = 1;
 165         sys_select_signal(SIGHUP);
 166 }
 167
 168 /****************************************************************************
 169  Catch a sigcld
 170 ****************************************************************************/
 171 static void sig_cld(int sig)
 172 {
 173         got_sig_cld = 1;
 174         sys_select_signal(SIGCLD);
 175 }
 176
 177 /****************************************************************************
 178   Send a SIGTERM to our process group.
 179 *****************************************************************************/
 180
 181 static void  killkids(void)
 182 {
 183         if(am_parent) kill(0,SIGTERM);
 184 }
 185
 186 /****************************************************************************
 187  Process a sam sync message - not sure whether to do this here or
 188  somewhere else.
 189 ****************************************************************************/
 190
 191 static void msg_sam_sync(struct messaging_context *msg,
 192                          void *private_data,
 193                          uint32_t msg_type,
 194                          struct server_id server_id,
 195                          DATA_BLOB *data)
 196 {
 197         DEBUG(10, ("** sam sync message received, ignoring\n"));
 198 }
 199
 200
 201 /****************************************************************************
 202  Open the socket communication - inetd.
 203 ****************************************************************************/
 204
 205 static bool open_sockets_inetd(void)
 206 {
 207         /* Started from inetd. fd 0 is the socket. */
 208         /* We will abort gracefully when the client or remote system
 209            goes away */
 210         smbd_set_server_fd(dup(0));
 211
 212         /* close our standard file descriptors */
 213         close_low_fds(False); /* Don't close stderr */
 214
 215         set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 216         set_socket_options(smbd_server_fd(), lp_socket_options());
 217
 218         return True;
 219 }
 220
 221 static void msg_exit_server(struct messaging_context *msg,
 222                             void *private_data,
 223                             uint32_t msg_type,
 224                             struct server_id server_id,
 225                             DATA_BLOB *data)
 226 {
 227         DEBUG(3, ("got a SHUTDOWN message\n"));
 228         exit_server_cleanly(NULL);
 229 }
 230
 231 #ifdef DEVELOPER
 232 static void msg_inject_fault(struct messaging_context *msg,
 233                              void *private_data,
 234                              uint32_t msg_type,
 235                              struct server_id src,
 236                              DATA_BLOB *data)
 237 {
 238         int sig;
 239
 240         if (data->length != sizeof(sig)) {
 241
 242                 DEBUG(0, ("Process %s sent bogus signal injection request\n",
 243                           procid_str_static(&src)));
 244                 return;
 245         }
 246
 247         sig = *(int *)data->data;
 248         if (sig == -1) {
 249                 exit_server("internal error injected");
 250                 return;
 251         }
 252
 253 #if HAVE_STRSIGNAL
 254         DEBUG(0, ("Process %s requested injection of signal %d (%s)\n",
 255                   procid_str_static(&src), sig, strsignal(sig)));
 256 #else
 257         DEBUG(0, ("Process %s requested injection of signal %d\n",
 258                   procid_str_static(&src), sig));
 259 #endif
 260
 261         kill(sys_getpid(), sig);
 262 }
 263 #endif /* DEVELOPER */
 264
 265 struct child_pid {
 266         struct child_pid *prev, *next;
 267         pid_t pid;
 268 };
 269
 270 static struct child_pid *children;
 271 static int num_children;
 272
 273 static void add_child_pid(pid_t pid)
 274 {
 275         struct child_pid *child;
 276
 277         if (lp_max_smbd_processes() == 0) {
 278                 /* Don't bother with the child list if we don't care anyway */
 279                 return;
 280         }
 281
 282         child = SMB_MALLOC_P(struct child_pid);
 283         if (child == NULL) {
 284                 DEBUG(0, ("Could not add child struct -- malloc failed\n"));
 285                 return;
 286         }
 287         child->pid = pid;
 288         DLIST_ADD(children, child);
 289         num_children += 1;
 290 }
 291
 292 static void remove_child_pid(pid_t pid, bool unclean_shutdown)
 293 {
 294         struct child_pid *child;
 295
 296         if (unclean_shutdown) {
 297                 /* a child terminated uncleanly so tickle all processes to see
 298                    if they can grab any of the pending locks
 299                 */
 300                 DEBUG(3,(__location__ " Unclean shutdown of pid %u\n", pid));
 301                 messaging_send_buf(smbd_messaging_context(), procid_self(),
 302                                    MSG_SMB_BRL_VALIDATE, NULL, 0);
 303                 message_send_all(smbd_messaging_context(),
 304                                  MSG_SMB_UNLOCK, NULL, 0, NULL);
 305         }
 306
 307         if (lp_max_smbd_processes() == 0) {
 308                 /* Don't bother with the child list if we don't care anyway */
 309                 return;
 310         }
 311
 312         for (child = children; child != NULL; child = child->next) {
 313                 if (child->pid == pid) {
 314                         struct child_pid *tmp = child;
 315                         DLIST_REMOVE(children, child);
 316                         SAFE_FREE(tmp);
 317                         num_children -= 1;
 318                         return;
 319                 }
 320         }
 321
 322         DEBUG(0, ("Could not find child %d -- ignoring\n", (int)pid));
 323 }
 324
 325 /****************************************************************************
 326  Have we reached the process limit ?
 327 ****************************************************************************/
 328
 329 static bool allowable_number_of_smbd_processes(void)
 330 {
 331         int max_processes = lp_max_smbd_processes();
 332
 333         if (!max_processes)
 334                 return True;
 335
 336         return num_children < max_processes;
 337 }
 338
 339 /****************************************************************************
 340  Open the socket communication.
 341 ****************************************************************************/
 342
 343 static bool open_sockets_smbd(bool is_daemon, bool interactive, const char *smb_ports)
 344 {
 345         int num_interfaces = iface_count();
 346         int num_sockets = 0;
 347         int fd_listenset[FD_SETSIZE];
 348         fd_set listen_set;
 349         int s;
 350         int maxfd = 0;
 351         int i;
 352         char *ports;
 353         struct dns_reg_state * dns_reg = NULL;
 354         unsigned dns_port = 0;
 355
 356         if (!is_daemon) {
 357                 return open_sockets_inetd();
 358         }
 359
 360 #ifdef HAVE_ATEXIT
 361         {
 362                 static int atexit_set;
 363                 if(atexit_set == 0) {
 364                         atexit_set=1;
 365                         atexit(killkids);
 366                 }
 367         }
 368 #endif
 369
 370         /* Stop zombies */
 371         CatchSignal(SIGCLD, sig_cld);
 372
 373         FD_ZERO(&listen_set);
 374
 375         /* use a reasonable default set of ports - listing on 445 and 139 */
 376         if (!smb_ports) {
 377                 ports = lp_smb_ports();
 378                 if (!ports || !*ports) {
 379                         ports = smb_xstrdup(SMB_PORTS);
 380                 } else {
 381                         ports = smb_xstrdup(ports);
 382                 }
 383         } else {
 384                 ports = smb_xstrdup(smb_ports);
 385         }
 386
 387         if (lp_interfaces() && lp_bind_interfaces_only()) {
 388                 /* We have been given an interfaces line, and been
 389                    told to only bind to those interfaces. Create a
 390                    socket per interface and bind to only these.
 391                 */
 392
 393                 /* Now open a listen socket for each of the
 394                    interfaces. */
 395                 for(i = 0; i < num_interfaces; i++) {
 396                         TALLOC_CTX *frame = NULL;
 397                         const struct sockaddr_storage *ifss =
 398                                         iface_n_sockaddr_storage(i);
 399                         char *tok;
 400                         const char *ptr;
 401
 402                         if (ifss == NULL) {
 403                                 DEBUG(0,("open_sockets_smbd: "
 404                                         "interface %d has NULL IP address !\n",
 405                                         i));
 406                                 continue;
 407                         }
 408
 409                         frame = talloc_stackframe();
 410                         for (ptr=ports;
 411                                         next_token_talloc(frame,&ptr, &tok, " \t,");) {
 412                                 unsigned port = atoi(tok);
 413                                 if (port == 0 || port > 0xffff) {
 414                                         continue;
 415                                 }
 416
 417                                 /* Keep the first port for mDNS service
 418                                  * registration.
 419                                  */
 420                                 if (dns_port == 0) {
 421                                         dns_port = port;
 422                                 }
 423
 424                                 s = fd_listenset[num_sockets] =
 425                                         open_socket_in(SOCK_STREAM,
 426                                                         port,
 427                                                         num_sockets == 0 ? 0 : 2,
 428                                                         ifss,
 429                                                         true);
 430                                 if(s == -1) {
 431                                         continue;
 432                                 }
 433
 434                                 /* ready to listen */
 435                                 set_socket_options(s,"SO_KEEPALIVE");
 436                                 set_socket_options(s,lp_socket_options());
 437
 438                                 /* Set server socket to
 439                                  * non-blocking for the accept. */
 440                                 set_blocking(s,False);
 441
 442                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 443                                         DEBUG(0,("open_sockets_smbd: listen: "
 444                                                 "%s\n", strerror(errno)));
 445                                         close(s);
 446                                         TALLOC_FREE(frame);
 447                                         return False;
 448                                 }
 449                                 FD_SET(s,&listen_set);
 450                                 maxfd = MAX( maxfd, s);
 451
 452                                 num_sockets++;
 453                                 if (num_sockets >= FD_SETSIZE) {
 454                                         DEBUG(0,("open_sockets_smbd: Too "
 455                                                 "many sockets to bind to\n"));
 456                                         TALLOC_FREE(frame);
 457                                         return False;
 458                                 }
 459                         }
 460                         TALLOC_FREE(frame);
 461                 }
 462         } else {
 463                 /* Just bind to 0.0.0.0 - accept connections
 464                    from anywhere. */
 465
 466                 TALLOC_CTX *frame = talloc_stackframe();
 467                 char *tok;
 468                 const char *ptr;
 469                 const char *sock_addr = lp_socket_address();
 470                 char *sock_tok;
 471                 const char *sock_ptr;
 472
 473                 if (strequal(sock_addr, "0.0.0.0") ||
 474                     strequal(sock_addr, "::")) {
 475 #if HAVE_IPV6
 476                         sock_addr = "::,0.0.0.0";
 477 #else
 478                         sock_addr = "0.0.0.0";
 479 #endif
 480                 }
 481
 482                 for (sock_ptr=sock_addr;
 483                                 next_token_talloc(frame, &sock_ptr, &sock_tok, " \t,"); ) {
 484                         for (ptr=ports; next_token_talloc(frame, &ptr, &tok, " \t,"); ) {
 485                                 struct sockaddr_storage ss;
 486
 487                                 unsigned port = atoi(tok);
 488                                 if (port == 0 || port > 0xffff) {
 489                                         continue;
 490                                 }
 491
 492                                 /* Keep the first port for mDNS service
 493                                  * registration.
 494                                  */
 495                                 if (dns_port == 0) {
 496                                         dns_port = port;
 497                                 }
 498
 499                                 /* open an incoming socket */
 500                                 if (!interpret_string_addr(&ss, sock_tok,
 501                                                 AI_NUMERICHOST|AI_PASSIVE)) {
 502                                         continue;
 503                                 }
 504
 505                                 s = open_socket_in(SOCK_STREAM,
 506                                                 port,
 507                                                 num_sockets == 0 ? 0 : 2,
 508                                                 &ss,
 509                                                 true);
 510                                 if (s == -1) {
 511                                         continue;
 512                                 }
 513
 514                                 /* ready to listen */
 515                                 set_socket_options(s,"SO_KEEPALIVE");
 516                                 set_socket_options(s,lp_socket_options());
 517
 518                                 /* Set server socket to non-blocking
 519                                  * for the accept. */
 520                                 set_blocking(s,False);
 521
 522                                 if (listen(s, SMBD_LISTEN_BACKLOG) == -1) {
 523                                         DEBUG(0,("open_sockets_smbd: "
 524                                                 "listen: %s\n",
 525                                                  strerror(errno)));
 526                                         close(s);
 527                                         TALLOC_FREE(frame);
 528                                         return False;
 529                                 }
 530
 531                                 fd_listenset[num_sockets] = s;
 532                                 FD_SET(s,&listen_set);
 533                                 maxfd = MAX( maxfd, s);
 534
 535                                 num_sockets++;
 536
 537                                 if (num_sockets >= FD_SETSIZE) {
 538                                         DEBUG(0,("open_sockets_smbd: Too "
 539                                                 "many sockets to bind to\n"));
 540                                         TALLOC_FREE(frame);
 541                                         return False;
 542                                 }
 543                         }
 544                 }
 545                 TALLOC_FREE(frame);
 546         }
 547
 548         SAFE_FREE(ports);
 549
 550         if (num_sockets == 0) {
 551                 DEBUG(0,("open_sockets_smbd: No "
 552                         "sockets available to bind to.\n"));
 553                 return false;
 554         }
 555
 556         /* Setup the main smbd so that we can get messages. Note that
 557            do this after starting listening. This is needed as when in
 558            clustered mode, ctdb won't allow us to start doing database
 559            operations until it has gone thru a full startup, which
 560            includes checking to see that smbd is listening. */
 561         claim_connection(NULL,"",
 562                          FLAG_MSG_GENERAL|FLAG_MSG_SMBD|FLAG_MSG_DBWRAP);
 563
 564         /* Listen to messages */
 565
 566         messaging_register(smbd_messaging_context(), NULL,
 567                            MSG_SMB_SAM_SYNC, msg_sam_sync);
 568         messaging_register(smbd_messaging_context(), NULL,
 569                            MSG_SHUTDOWN, msg_exit_server);
 570         messaging_register(smbd_messaging_context(), NULL,
 571                            MSG_SMB_FILE_RENAME, msg_file_was_renamed);
 572         messaging_register(smbd_messaging_context(), NULL,
 573                            MSG_SMB_CONF_UPDATED, smb_conf_updated);
 574         messaging_register(smbd_messaging_context(), NULL,
 575                            MSG_SMB_STAT_CACHE_DELETE, smb_stat_cache_delete);
 576         brl_register_msgs(smbd_messaging_context());
 577
 578 #ifdef CLUSTER_SUPPORT
 579         if (lp_clustering()) {
 580                 ctdbd_register_reconfigure(messaging_ctdbd_connection());
 581         }
 582 #endif
 583
 584 #ifdef DEVELOPER
 585         messaging_register(smbd_messaging_context(), NULL,
 586                            MSG_SMB_INJECT_FAULT, msg_inject_fault);
 587 #endif
 588
 589         /* now accept incoming connections - forking a new process
 590            for each incoming connection */
 591         DEBUG(2,("waiting for a connection\n"));
 592         while (1) {
 593                 struct timeval now, idle_timeout;
 594                 fd_set r_fds, w_fds;
 595                 int num;
 596
 597                 /* Ensure we respond to PING and DEBUG messages from the main smbd. */
 598                 message_dispatch(smbd_messaging_context());
 599
 600                 if (got_sig_cld) {
 601                         pid_t pid;
 602                         int status;
 603
 604                         got_sig_cld = False;
 605
 606                         while ((pid = sys_waitpid(-1, &status, WNOHANG)) > 0) {
 607                                 bool unclean_shutdown = False;
 608
 609                                 /* If the child terminated normally, assume
 610                                    it was an unclean shutdown unless the
 611                                    status is 0
 612                                 */
 613                                 if (WIFEXITED(status)) {
 614                                         unclean_shutdown = WEXITSTATUS(status);
 615                                 }
 616                                 /* If the child terminated due to a signal
 617                                    we always assume it was unclean.
 618                                 */
 619                                 if (WIFSIGNALED(status)) {
 620                                         unclean_shutdown = True;
 621                                 }
 622                                 remove_child_pid(pid, unclean_shutdown);
 623                         }
 624                 }
 625
 626                 idle_timeout = timeval_zero();
 627
 628                 memcpy((char *)&r_fds, (char *)&listen_set,
 629                        sizeof(listen_set));
 630                 FD_ZERO(&w_fds);
 631                 GetTimeOfDay(&now);
 632
 633                 /* Kick off our mDNS registration. */
 634                 if (dns_port != 0) {
 635                         dns_register_smbd(&dns_reg, dns_port, &maxfd,
 636                                         &r_fds, &idle_timeout);
 637                 }
 638
 639                 event_add_to_select_args(smbd_event_context(), &now,
 640                                          &r_fds, &w_fds, &idle_timeout,
 641                                          &maxfd);
 642
 643                 num = sys_select(maxfd+1,&r_fds,&w_fds,NULL,
 644                                  timeval_is_zero(&idle_timeout) ?
 645                                  NULL : &idle_timeout);
 646
 647                 if (num == -1 && errno == EINTR) {
 648                         if (got_sig_term) {
 649                                 exit_server_cleanly(NULL);
 650                         }
 651
 652                         /* check for sighup processing */
 653                         if (reload_after_sighup) {
 654                                 change_to_root_user();
 655                                 DEBUG(1,("Reloading services after SIGHUP\n"));
 656                                 reload_services(False);
 657                                 reload_after_sighup = 0;
 658                         }
 659
 660                         continue;
 661                 }
 662
 663
 664                 /* If the idle timeout fired and we don't have any connected
 665                  * users, exit gracefully. We should be running under a process
 666                  * controller that will restart us if necessry.
 667                  */
 668                 if (num == 0 && count_all_current_connections() == 0) {
 669                         exit_server_cleanly("idle timeout");
 670                 }
 671
 672                 /* process pending nDNS responses */
 673                 if (dns_register_smbd_reply(dns_reg, &r_fds, &idle_timeout)) {
 674                         --num;
 675                 }
 676
 677                 if (run_events(smbd_event_context(), num, &r_fds, &w_fds)) {
 678                         continue;
 679                 }
 680
 681                 /* check if we need to reload services */
 682                 check_reload(time(NULL));
 683
 684                 /* Find the sockets that are read-ready -
 685                    accept on these. */
 686                 for( ; num > 0; num--) {
 687                         struct sockaddr addr;
 688                         socklen_t in_addrlen = sizeof(addr);
 689                         pid_t child = 0;
 690
 691                         s = -1;
 692                         for(i = 0; i < num_sockets; i++) {
 693                                 if(FD_ISSET(fd_listenset[i],&r_fds)) {
 694                                         s = fd_listenset[i];
 695                                         /* Clear this so we don't look
 696                                            at it again. */
 697                                         FD_CLR(fd_listenset[i],&r_fds);
 698                                         break;
 699                                 }
 700                         }
 701
 702                         smbd_set_server_fd(accept(s,&addr,&in_addrlen));
 703
 704                         if (smbd_server_fd() == -1 && errno == EINTR)
 705                                 continue;
 706
 707                         if (smbd_server_fd() == -1) {
 708                                 DEBUG(2,("open_sockets_smbd: accept: %s\n",
 709                                          strerror(errno)));
 710                                 continue;
 711                         }
 712
 713                         /* Ensure child is set to blocking mode */
 714                         set_blocking(smbd_server_fd(),True);
 715
 716                         if (smbd_server_fd() != -1 && interactive)
 717                                 return True;
 718
 719                         if (allowable_number_of_smbd_processes() &&
 720                             smbd_server_fd() != -1 &&
 721                             ((child = sys_fork())==0)) {
 722                                 char remaddr[INET6_ADDRSTRLEN];
 723
 724                                 /* Child code ... */
 725
 726                                 /* Stop zombies, the parent explicitly handles
 727                                  * them, counting worker smbds. */
 728                                 CatchChild();
 729
 730                                 /* close the listening socket(s) */
 731                                 for(i = 0; i < num_sockets; i++)
 732                                         close(fd_listenset[i]);
 733
 734                                 /* close our mDNS daemon handle */
 735                                 dns_register_close(&dns_reg);
 736
 737                                 /* close our standard file
 738                                    descriptors */
 739                                 close_low_fds(False);
 740                                 am_parent = 0;
 741
 742                                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 743                                 set_socket_options(smbd_server_fd(),
 744                                                    lp_socket_options());
 745
 746                                 /* this is needed so that we get decent entries
 747                                    in smbstatus for port 445 connects */
 748                                 set_remote_machine_name(get_peer_addr(smbd_server_fd(),
 749                                                                 remaddr,
 750                                                                 sizeof(remaddr)),
 751                                                                 false);
 752
 753                                 if (!reinit_after_fork(
 754                                             smbd_messaging_context(), true)) {
 755                                         DEBUG(0,("reinit_after_fork() failed\n"));
 756                                         smb_panic("reinit_after_fork() failed");
 757                                 }
 758
 759                                 return True;
 760                         }
 761                         /* The parent doesn't need this socket */
 762                         close(smbd_server_fd());
 763
 764                         /* Sun May 6 18:56:14 2001 ackley@cs.unm.edu:
 765                                 Clear the closed fd info out of server_fd --
 766                                 and more importantly, out of client_fd in
 767                                 util_sock.c, to avoid a possible
 768                                 getpeername failure if we reopen the logs
 769                                 and use %I in the filename.
 770                         */
 771
 772                         smbd_set_server_fd(-1);
 773
 774                         if (child != 0) {
 775                                 add_child_pid(child);
 776                         }
 777
 778                         /* Force parent to check log size after
 779                          * spawning child.  Fix from
 780                          * klausr@ITAP.Physik.Uni-Stuttgart.De.  The
 781                          * parent smbd will log to logserver.smb.  It
 782                          * writes only two messages for each child
 783                          * started/finished. But each child writes,
 784                          * say, 50 messages also in logserver.smb,
 785                          * begining with the debug_count of the
 786                          * parent, before the child opens its own log
 787                          * file logserver.client. In a worst case
 788                          * scenario the size of logserver.smb would be
 789                          * checked after about 50*50=2500 messages
 790                          * (ca. 100kb).
 791                          * */
 792                         force_check_log_size();
 793
 794                 } /* end for num */
 795         } /* end while 1 */
 796
 797 /* NOTREACHED   return True; */
 798 }
 799
 800 /****************************************************************************
 801  Reload printers
 802 **************************************************************************/
 803 void reload_printers(void)
 804 {
 805         int snum;
 806         int n_services = lp_numservices();
 807         int pnum = lp_servicenumber(PRINTERS_NAME);
 808         const char *pname;
 809
 810         pcap_cache_reload();
 811
 812         /* remove stale printers */
 813         for (snum = 0; snum < n_services; snum++) {
 814                 /* avoid removing PRINTERS_NAME or non-autoloaded printers */
 815                 if (snum == pnum || !(lp_snum_ok(snum) && lp_print_ok(snum) &&
 816                                       lp_autoloaded(snum)))
 817                         continue;
 818
 819                 pname = lp_printername(snum);
 820                 if (!pcap_printername_ok(pname)) {
 821                         DEBUG(3, ("removing stale printer %s\n", pname));
 822
 823                         if (is_printer_published(NULL, snum, NULL))
 824                                 nt_printer_publish(NULL, snum, SPOOL_DS_UNPUBLISH);
 825                         del_a_printer(pname);
 826                         lp_killservice(snum);
 827                 }
 828         }
 829
 830         load_printers();
 831 }
 832
 833 /****************************************************************************
 834  Reload the services file.
 835 **************************************************************************/
 836
 837 bool reload_services(bool test)
 838 {
 839         bool ret;
 840
 841         if (lp_loaded()) {
 842                 char *fname = lp_configfile();
 843                 if (file_exist(fname) &&
 844                     !strcsequal(fname, get_dyn_CONFIGFILE())) {
 845                         set_dyn_CONFIGFILE(fname);
 846                         test = False;
 847                 }
 848         }
 849
 850         reopen_logs();
 851
 852         if (test && !lp_file_list_changed())
 853                 return(True);
 854
 855         lp_killunused(conn_snum_used);
 856
 857         ret = lp_load(get_dyn_CONFIGFILE(), False, False, True, True);
 858
 859         reload_printers();
 860
 861         /* perhaps the config filename is now set */
 862         if (!test)
 863                 reload_services(True);
 864
 865         reopen_logs();
 866
 867         load_interfaces();
 868
 869         if (smbd_server_fd() != -1) {
 870                 set_socket_options(smbd_server_fd(),"SO_KEEPALIVE");
 871                 set_socket_options(smbd_server_fd(), lp_socket_options());
 872         }
 873
 874         mangle_reset_cache();
 875         reset_stat_cache();
 876
 877         /* this forces service parameters to be flushed */
 878         set_current_service(NULL,0,True);
 879
 880         return(ret);
 881 }
 882
 883 /****************************************************************************
 884  Exit the server.
 885 ****************************************************************************/
 886
 887 /* Reasons for shutting down a server process. */
 888 enum server_exit_reason { SERVER_EXIT_NORMAL, SERVER_EXIT_ABNORMAL };
 889
 890 static void exit_server_common(enum server_exit_reason how,
 891         const char *const reason) _NORETURN_;
 892
 893 static void exit_server_common(enum server_exit_reason how,
 894         const char *const reason)
 895 {
 896         static int firsttime=1;
 897         bool had_open_conn;
 898
 899         if (!firsttime)
 900                 exit(0);
 901         firsttime = 0;
 902
 903         change_to_root_user();
 904
 905         if (negprot_global_auth_context) {
 906                 (negprot_global_auth_context->free)(&negprot_global_auth_context);
 907         }
 908
 909         had_open_conn = conn_close_all();
 910
 911         invalidate_all_vuids();
 912
 913         /* 3 second timeout. */
 914         print_notify_send_messages(smbd_messaging_context(), 3);
 915
 916         /* delete our entry in the connections database. */
 917         yield_connection(NULL,"");
 918
 919         respond_to_all_remaining_local_messages();
 920
 921 #ifdef WITH_DFS
 922         if (dcelogin_atmost_once) {
 923                 dfs_unlogin();
 924         }
 925 #endif
 926
 927 #ifdef USE_DMAPI
 928         /* Destroy Samba DMAPI session only if we are master smbd process */
 929         if (am_parent) {
 930                 if (!dmapi_destroy_session()) {
 931                         DEBUG(0,("Unable to close Samba DMAPI session\n"));
 932                 }
 933         }
 934 #endif
 935
 936         locking_end();
 937         printing_end();
 938
 939         if (how != SERVER_EXIT_NORMAL) {
 940                 int oldlevel = DEBUGLEVEL;
 941
 942                 DEBUGLEVEL = 10;
 943
 944                 DEBUGSEP(0);
 945                 DEBUG(0,("Abnormal server exit: %s\n",
 946                         reason ? reason : "no explanation provided"));
 947                 DEBUGSEP(0);
 948
 949                 log_stack_trace();
 950
 951                 DEBUGLEVEL = oldlevel;
 952                 dump_core();
 953
 954         } else {
 955                 DEBUG(3,("Server exit (%s)\n",
 956                         (reason ? reason : "normal exit")));
 957         }
 958
 959         /* if we had any open SMB connections when we exited then we
 960            need to tell the parent smbd so that it can trigger a retry
 961            of any locks we may have been holding or open files we were
 962            blocking */
 963         if (had_open_conn) {
 964                 exit(1);
 965         } else {
 966                 exit(0);
 967         }
 968 }
 969
 970 void exit_server(const char *const explanation)
 971 {
 972         exit_server_common(SERVER_EXIT_ABNORMAL, explanation);
 973 }
 974
 975 void exit_server_cleanly(const char *const explanation)
 976 {
 977         exit_server_common(SERVER_EXIT_NORMAL, explanation);
 978 }
 979
 980 void exit_server_fault(void)
 981 {
 982         exit_server("critical server fault");
 983 }
 984
 985
 986 /****************************************************************************
 987 received when we should release a specific IP
 988 ****************************************************************************/
 989 static void release_ip(const char *ip, void *priv)
 990 {
 991         char addr[INET6_ADDRSTRLEN];
 992
 993         if (strcmp(client_socket_addr(get_client_fd(),addr,sizeof(addr)), ip) == 0) {
 994                 /* we can't afford to do a clean exit - that involves
 995                    database writes, which would potentially mean we
 996                    are still running after the failover has finished -
 997                    we have to get rid of this process ID straight
 998                    away */
 999                 DEBUG(0,("Got release IP message for our IP %s - exiting immediately\n",
1000                         ip));
1001                 /* note we must exit with non-zero status so the unclean handler gets
1002                    called in the parent, so that the brl database is tickled */
1003                 _exit(1);
1004         }
1005 }
1006
1007 static void msg_release_ip(struct messaging_context *msg_ctx, void *private_data,
1008                            uint32_t msg_type, struct server_id server_id, DATA_BLOB *data)
1009 {
1010         release_ip((char *)data->data, NULL);
1011 }
1012
1013 /****************************************************************************
1014  Initialise connect, service and file structs.
1015 ****************************************************************************/
1016
1017 static bool init_structs(void )
1018 {
1019         /*
1020          * Set the machine NETBIOS name if not already
1021          * set from the config file.
1022          */
1023
1024         if (!init_names())
1025                 return False;
1026
1027         conn_init();
1028
1029         file_init();
1030
1031         /* for RPC pipes */
1032         init_rpc_pipe_hnd();
1033
1034         init_dptrs();
1035
1036         if (!secrets_init())
1037                 return False;
1038
1039         return True;
1040 }
1041
1042 /*
1043  * Send keepalive packets to our client
1044  */
1045 static bool keepalive_fn(const struct timeval *now, void *private_data)
1046 {
1047         if (!send_keepalive(smbd_server_fd())) {
1048                 DEBUG( 2, ( "Keepalive failed - exiting.\n" ) );
1049                 return False;
1050         }
1051         return True;
1052 }
1053
1054 /*
1055  * Do the recurring check if we're idle
1056  */
1057 static bool deadtime_fn(const struct timeval *now, void *private_data)
1058 {
1059         if ((conn_num_open() == 0)
1060             || (conn_idle_all(now->tv_sec))) {
1061                 DEBUG( 2, ( "Closing idle connection\n" ) );
1062                 messaging_send(smbd_messaging_context(), procid_self(),
1063                                MSG_SHUTDOWN, &data_blob_null);
1064                 return False;
1065         }
1066
1067         return True;
1068 }
1069
1070 /*
1071  * Do the recurring log file and smb.conf reload checks.
1072  */
1073
1074 static bool housekeeping_fn(const struct timeval *now, void *private_data)
1075 {
1076         change_to_root_user();
1077
1078         /* update printer queue caches if necessary */
1079         update_monitored_printq_cache();
1080
1081         /* check if we need to reload services */
1082         check_reload(time(NULL));
1083
1084         /* Change machine password if neccessary. */
1085         attempt_machine_password_change();
1086
1087         /*
1088          * Force a log file check.
1089          */
1090         force_check_log_size();
1091         check_log_size();
1092         return true;
1093 }
1094
1095 /****************************************************************************
1096  main program.
1097 ****************************************************************************/
1098
1099 /* Declare prototype for build_options() to avoid having to run it through
1100    mkproto.h.  Mixing $(builddir) and $(srcdir) source files in the current
1101    prototype generation system is too complicated. */
1102
1103 extern void build_options(bool screen);
1104
1105  int main(int argc,const char *argv[])
1106 {
1107         /* shall I run as a daemon */
1108         static bool is_daemon = False;
1109         static bool interactive = False;
1110         static bool Fork = True;
1111         static bool no_process_group = False;
1112         static bool log_stdout = False;
1113         static char *ports = NULL;
1114         static char *profile_level = NULL;
1115         int opt;
1116         poptContext pc;
1117         bool print_build_options = False;
1118         enum {
1119                 OPT_DAEMON = 1000,
1120                 OPT_INTERACTIVE,
1121                 OPT_FORK,
1122                 OPT_NO_PROCESS_GROUP,
1123                 OPT_LOG_STDOUT
1124         };
1125         struct poptOption long_options[] = {
1126         POPT_AUTOHELP
1127         {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
1128         {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)"},
1129         {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools, etc.)" },
1130         {"no-process-group", '\0', POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
1131         {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
1132         {"build-options", 'b', POPT_ARG_NONE, NULL, 'b', "Print build options" },
1133         {"port", 'p', POPT_ARG_STRING, &ports, 0, "Listen on the specified ports"},
1134         {"profiling-level", 'P', POPT_ARG_STRING, &profile_level, 0, "Set profiling level","PROFILE_LEVEL"},
1135         POPT_COMMON_SAMBA
1136         POPT_COMMON_DYNCONFIG
1137         POPT_TABLEEND
1138         };
1139         TALLOC_CTX *frame = talloc_stackframe(); /* Setup tos. */
1140
1141         TimeInit();
1142
1143 #ifdef HAVE_SET_AUTH_PARAMETERS
1144         set_auth_parameters(argc,argv);
1145 #endif
1146
1147         pc = poptGetContext("smbd", argc, argv, long_options, 0);
1148         while((opt = poptGetNextOpt(pc)) != -1) {
1149                 switch (opt)  {
1150                 case OPT_DAEMON:
1151                         is_daemon = true;
1152                         break;
1153                 case OPT_INTERACTIVE:
1154                         interactive = true;
1155                         break;
1156                 case OPT_FORK:
1157                         Fork = false;
1158                         break;
1159                 case OPT_NO_PROCESS_GROUP:
1160                         no_process_group = true;
1161                         break;
1162                 case OPT_LOG_STDOUT:
1163                         log_stdout = true;
1164                         break;
1165                 case 'b':
1166                         print_build_options = True;
1167                         break;
1168                 default:
1169                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
1170                                   poptBadOption(pc, 0), poptStrerror(opt));
1171                         poptPrintUsage(pc, stderr, 0);
1172                         exit(1);
1173                 }
1174         }
1175         poptFreeContext(pc);
1176
1177         if (interactive) {
1178                 Fork = False;
1179                 log_stdout = True;
1180         }
1181
1182         setup_logging(argv[0],log_stdout);
1183
1184         if (print_build_options) {
1185                 build_options(True); /* Display output to screen as well as debug */
1186                 exit(0);
1187         }
1188
1189         load_case_tables();
1190
1191 #ifdef HAVE_SETLUID
1192         /* needed for SecureWare on SCO */
1193         setluid(0);
1194 #endif
1195
1196         sec_init();
1197
1198         set_remote_machine_name("smbd", False);
1199
1200         if (interactive && (DEBUGLEVEL >= 9)) {
1201                 talloc_enable_leak_report();
1202         }
1203
1204         if (log_stdout && Fork) {
1205                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
1206                 exit(1);
1207         }
1208
1209         /* we want to re-seed early to prevent time delays causing
1210            client problems at a later date. (tridge) */
1211         generate_random_buffer(NULL, 0);
1212
1213         /* make absolutely sure we run as root - to handle cases where people
1214            are crazy enough to have it setuid */
1215
1216         gain_root_privilege();
1217         gain_root_group_privilege();
1218
1219         fault_setup((void (*)(void *))exit_server_fault);
1220         dump_core_setup("smbd");
1221
1222         CatchSignal(SIGTERM , SIGNAL_CAST sig_term);
1223         CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
1224
1225         /* we are never interested in SIGPIPE */
1226         BlockSignals(True,SIGPIPE);
1227
1228 #if defined(SIGFPE)
1229         /* we are never interested in SIGFPE */
1230         BlockSignals(True,SIGFPE);
1231 #endif
1232
1233 #if defined(SIGUSR2)
1234         /* We are no longer interested in USR2 */
1235         BlockSignals(True,SIGUSR2);
1236 #endif
1237
1238         /* POSIX demands that signals are inherited. If the invoking process has
1239          * these signals masked, we will have problems, as we won't recieve them. */
1240         BlockSignals(False, SIGHUP);
1241         BlockSignals(False, SIGUSR1);
1242         BlockSignals(False, SIGTERM);
1243
1244         /* we want total control over the permissions on created files,
1245            so set our umask to 0 */
1246         umask(0);
1247
1248         init_sec_ctx();
1249
1250         reopen_logs();
1251
1252         DEBUG(0,("smbd version %s started.\n", SAMBA_VERSION_STRING));
1253         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
1254
1255         DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
1256                  (int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
1257
1258         /* Output the build options to the debug log */
1259         build_options(False);
1260
1261         if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
1262                 DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
1263                 exit(1);
1264         }
1265
1266         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
1267                 DEBUG(0, ("error opening config file\n"));
1268                 exit(1);
1269         }
1270
1271         if (smbd_messaging_context() == NULL)
1272                 exit(1);
1273
1274         if (!reload_services(False))
1275                 return(-1);
1276
1277         init_structs();
1278
1279 #ifdef WITH_PROFILE
1280         if (!profile_setup(smbd_messaging_context(), False)) {
1281                 DEBUG(0,("ERROR: failed to setup profiling\n"));
1282                 return -1;
1283         }
1284         if (profile_level != NULL) {
1285                 int pl = atoi(profile_level);
1286                 struct server_id src;
1287
1288                 DEBUG(1, ("setting profiling level: %s\n",profile_level));
1289                 src.pid = getpid();
1290                 set_profile_level(pl, src);
1291         }
1292 #endif
1293
1294         DEBUG(3,( "loaded services\n"));
1295
1296         if (!is_daemon && !is_a_socket(0)) {
1297                 if (!interactive)
1298                         DEBUG(0,("standard input is not a socket, assuming -D option\n"));
1299
1300                 /*
1301                  * Setting is_daemon here prevents us from eventually calling
1302                  * the open_sockets_inetd()
1303                  */
1304
1305                 is_daemon = True;
1306         }
1307
1308         if (is_daemon && !interactive) {
1309                 DEBUG( 3, ( "Becoming a daemon.\n" ) );
1310                 become_daemon(Fork, no_process_group);
1311         }
1312
1313 #if HAVE_SETPGID
1314         /*
1315          * If we're interactive we want to set our own process group for
1316          * signal management.
1317          */
1318         if (interactive && !no_process_group)
1319                 setpgid( (pid_t)0, (pid_t)0);
1320 #endif
1321
1322         if (!directory_exist(lp_lockdir()))
1323                 mkdir(lp_lockdir(), 0755);
1324
1325         if (is_daemon)
1326                 pidfile_create("smbd");
1327
1328         if (!reinit_after_fork(smbd_messaging_context(), false)) {
1329                 DEBUG(0,("reinit_after_fork() failed\n"));
1330                 exit(1);
1331         }
1332
1333         /* Setup all the TDB's - including CLEAR_IF_FIRST tdb's. */
1334
1335         if (smbd_memcache() == NULL) {
1336                 exit(1);
1337         }
1338
1339         memcache_set_global(smbd_memcache());
1340
1341         /* Initialise the password backed before the global_sam_sid
1342            to ensure that we fetch from ldap before we make a domain sid up */
1343
1344         if(!initialize_password_db(False, smbd_event_context()))
1345                 exit(1);
1346
1347         if (!secrets_init()) {
1348                 DEBUG(0, ("ERROR: smbd can not open secrets.tdb\n"));
1349                 exit(1);
1350         }
1351
1352         if(!get_global_sam_sid()) {
1353                 DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
1354                 exit(1);
1355         }
1356
1357         if (!session_init())
1358                 exit(1);
1359
1360         if (!connections_init(True))
1361                 exit(1);
1362
1363         if (!locking_init())
1364                 exit(1);
1365
1366         namecache_enable();
1367
1368         if (!W_ERROR_IS_OK(registry_init_full()))
1369                 exit(1);
1370
1371 #if 0
1372         if (!init_svcctl_db())
1373                 exit(1);
1374 #endif
1375
1376         if (!print_backend_init(smbd_messaging_context()))
1377                 exit(1);
1378
1379         if (!init_guest_info()) {
1380                 DEBUG(0,("ERROR: failed to setup guest info.\n"));
1381                 return -1;
1382         }
1383
1384         /* only start the background queue daemon if we are
1385            running as a daemon -- bad things will happen if
1386            smbd is launched via inetd and we fork a copy of
1387            ourselves here */
1388
1389         if (is_daemon && !interactive
1390             && lp_parm_bool(-1, "smbd", "backgroundqueue", true)) {
1391                 start_background_queue();
1392         }
1393
1394         if (!open_sockets_smbd(is_daemon, interactive, ports))
1395                 exit(1);
1396
1397         /*
1398          * everything after this point is run after the fork()
1399          */
1400
1401         static_init_rpc;
1402
1403         init_modules();
1404
1405         /* Possibly reload the services file. Only worth doing in
1406          * daemon mode. In inetd mode, we know we only just loaded this.
1407          */
1408         if (is_daemon) {
1409                 reload_services(True);
1410         }
1411
1412         if (!init_account_policy()) {
1413                 DEBUG(0,("Could not open account policy tdb.\n"));
1414                 exit(1);
1415         }
1416
1417         if (*lp_rootdir()) {
1418                 if (chroot(lp_rootdir()) == 0)
1419                         DEBUG(2,("Changed root to %s\n", lp_rootdir()));
1420         }
1421
1422         /* Setup oplocks */
1423         if (!init_oplocks(smbd_messaging_context()))
1424                 exit(1);
1425
1426         /* Setup aio signal handler. */
1427         initialize_async_io_handler();
1428
1429         /* register our message handlers */
1430         messaging_register(smbd_messaging_context(), NULL,
1431                            MSG_SMB_FORCE_TDIS, msg_force_tdis);
1432         messaging_register(smbd_messaging_context(), NULL,
1433                            MSG_SMB_RELEASE_IP, msg_release_ip);
1434         messaging_register(smbd_messaging_context(), NULL,
1435                            MSG_SMB_CLOSE_FILE, msg_close_file);
1436
1437         if ((lp_keepalive() != 0)
1438             && !(event_add_idle(smbd_event_context(), NULL,
1439                                 timeval_set(lp_keepalive(), 0),
1440                                 "keepalive", keepalive_fn,
1441                                 NULL))) {
1442                 DEBUG(0, ("Could not add keepalive event\n"));
1443                 exit(1);
1444         }
1445
1446         if (!(event_add_idle(smbd_event_context(), NULL,
1447                              timeval_set(IDLE_CLOSED_TIMEOUT, 0),
1448                              "deadtime", deadtime_fn, NULL))) {
1449                 DEBUG(0, ("Could not add deadtime event\n"));
1450                 exit(1);
1451         }
1452
1453         if (!(event_add_idle(smbd_event_context(), NULL,
1454                              timeval_set(SMBD_SELECT_TIMEOUT, 0),
1455                              "housekeeping", housekeeping_fn, NULL))) {
1456                 DEBUG(0, ("Could not add housekeeping event\n"));
1457                 exit(1);
1458         }
1459
1460 #ifdef CLUSTER_SUPPORT
1461
1462         if (lp_clustering()) {
1463                 /*
1464                  * We need to tell ctdb about our client's TCP
1465                  * connection, so that for failover ctdbd can send
1466                  * tickle acks, triggering a reconnection by the
1467                  * client.
1468                  */
1469
1470                 struct sockaddr_storage srv, clnt;
1471
1472                 if (client_get_tcp_info(&srv, &clnt) == 0) {
1473
1474                         NTSTATUS status;
1475
1476                         status = ctdbd_register_ips(
1477                                 messaging_ctdbd_connection(),
1478                                 (struct sockaddr *)&srv,
1479                                 (struct sockaddr *)&clnt,
1480                                 release_ip, NULL);
1481
1482                         if (!NT_STATUS_IS_OK(status)) {
1483                                 DEBUG(0, ("ctdbd_register_ips failed: %s\n",
1484                                           nt_errstr(status)));
1485                         }
1486                 } else
1487                 {
1488                         DEBUG(0,("Unable to get tcp info for "
1489                                  "CTDB_CONTROL_TCP_CLIENT: %s\n",
1490                                  strerror(errno)));
1491                 }
1492         }
1493
1494 #endif
1495
1496         TALLOC_FREE(frame);
1497
1498         smbd_process();
1499
1500         namecache_shutdown();
1501
1502         exit_server_cleanly(NULL);
1503         return(0);
1504 }