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