source3/nmbd/nmbd.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    NBT netbios routines and daemon - version 2
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Jeremy Allison 1997-2002
   6    Copyright (C) Jelmer Vernooij 2002,2003 (Conversion to popt)
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 */
  23
  24 #include "includes.h"
  25
  26 int ClientNMB       = -1;
  27 int ClientDGRAM     = -1;
  28 int global_nmb_port = -1;
  29
  30 extern BOOL global_in_nmbd;
  31
  32 /* are we running as a daemon ? */
  33 static BOOL is_daemon;
  34
  35 /* fork or run in foreground ? */
  36 static BOOL Fork = True;
  37
  38 /* log to standard output ? */
  39 static BOOL log_stdout;
  40
  41 /* have we found LanMan clients yet? */
  42 BOOL found_lm_clients = False;
  43
  44 /* what server type are we currently */
  45
  46 time_t StartupTime = 0;
  47
  48 /**************************************************************************** **
  49  Handle a SIGTERM in band.
  50  **************************************************************************** */
  51
  52 static void terminate(void)
  53 {
  54         DEBUG(0,("Got SIGTERM: going down...\n"));
  55
  56         /* Write out wins.dat file if samba is a WINS server */
  57         wins_write_database(False);
  58
  59         /* Remove all SELF registered names from WINS */
  60         release_wins_names();
  61
  62         /* Announce all server entries as 0 time-to-live, 0 type. */
  63         announce_my_servers_removed();
  64
  65         /* If there was an async dns child - kill it. */
  66         kill_async_dns_child();
  67
  68         exit(0);
  69 }
  70
  71 /**************************************************************************** **
  72  Handle a SHUTDOWN message from smbcontrol.
  73  **************************************************************************** */
  74
  75 static void nmbd_terminate(int msg_type, pid_t src, void *buf, size_t len)
  76 {
  77         terminate();
  78 }
  79
  80 /**************************************************************************** **
  81  Catch a SIGTERM signal.
  82  **************************************************************************** */
  83
  84 static SIG_ATOMIC_T got_sig_term;
  85
  86 static void sig_term(int sig)
  87 {
  88         got_sig_term = 1;
  89         sys_select_signal();
  90 }
  91
  92 /**************************************************************************** **
  93  Catch a SIGHUP signal.
  94  **************************************************************************** */
  95
  96 static SIG_ATOMIC_T reload_after_sighup;
  97
  98 static void sig_hup(int sig)
  99 {
 100         reload_after_sighup = 1;
 101         sys_select_signal();
 102 }
 103
 104 #if DUMP_CORE
 105 /**************************************************************************** **
 106  Prepare to dump a core file - carefully!
 107  **************************************************************************** */
 108
 109 static BOOL dump_core(void)
 110 {
 111         char *p;
 112         pstring dname;
 113         pstrcpy( dname, lp_logfile() );
 114         if ((p=strrchr_m(dname,'/')))
 115                 *p=0;
 116         pstrcat( dname, "/corefiles" );
 117         mkdir( dname, 0700 );
 118         sys_chown( dname, getuid(), getgid() );
 119         chmod( dname, 0700 );
 120         if ( chdir(dname) )
 121                 return( False );
 122         umask( ~(0700) );
 123
 124 #ifdef HAVE_GETRLIMIT
 125 #ifdef RLIMIT_CORE
 126         {
 127                 struct rlimit rlp;
 128                 getrlimit( RLIMIT_CORE, &rlp );
 129                 rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
 130                 setrlimit( RLIMIT_CORE, &rlp );
 131                 getrlimit( RLIMIT_CORE, &rlp );
 132                 DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
 133         }
 134 #endif
 135 #endif
 136
 137
 138         DEBUG(0,("Dumping core in %s\n",dname));
 139         abort();
 140         return( True );
 141 }
 142 #endif
 143
 144 /**************************************************************************** **
 145  Possibly continue after a fault.
 146  **************************************************************************** */
 147
 148 static void fault_continue(void)
 149 {
 150 #if DUMP_CORE
 151         dump_core();
 152 #endif
 153 }
 154
 155 /**************************************************************************** **
 156  Expire old names from the namelist and server list.
 157  **************************************************************************** */
 158
 159 static void expire_names_and_servers(time_t t)
 160 {
 161         static time_t lastrun = 0;
 162
 163         if ( !lastrun )
 164                 lastrun = t;
 165         if ( t < (lastrun + 5) )
 166                 return;
 167         lastrun = t;
 168
 169         /*
 170          * Expire any timed out names on all the broadcast
 171          * subnets and those registered with the WINS server.
 172          * (nmbd_namelistdb.c)
 173          */
 174
 175         expire_names(t);
 176
 177         /*
 178          * Go through all the broadcast subnets and for each
 179          * workgroup known on that subnet remove any expired
 180          * server names. If a workgroup has an empty serverlist
 181          * and has itself timed out then remove the workgroup.
 182          * (nmbd_workgroupdb.c)
 183          */
 184
 185         expire_workgroups_and_servers(t);
 186 }
 187
 188 /************************************************************************** **
 189  Reload the list of network interfaces.
 190  ************************************************************************** */
 191
 192 static BOOL reload_interfaces(time_t t)
 193 {
 194         static time_t lastt;
 195         int n;
 196         struct subnet_record *subrec;
 197         extern BOOL rescan_listen_set;
 198         extern struct in_addr loopback_ip;
 199
 200         if (t && ((t - lastt) < NMBD_INTERFACES_RELOAD)) return False;
 201         lastt = t;
 202
 203         if (!interfaces_changed()) return False;
 204
 205         /* the list of probed interfaces has changed, we may need to add/remove
 206            some subnets */
 207         load_interfaces();
 208
 209         /* find any interfaces that need adding */
 210         for (n=iface_count() - 1; n >= 0; n--) {
 211                 struct interface *iface = get_interface(n);
 212
 213                 /*
 214                  * We don't want to add a loopback interface, in case
 215                  * someone has added 127.0.0.1 for smbd, nmbd needs to
 216                  * ignore it here. JRA.
 217                  */
 218
 219                 if (ip_equal(iface->ip, loopback_ip)) {
 220                         DEBUG(2,("reload_interfaces: Ignoring loopback interface %s\n", inet_ntoa(iface->ip)));
 221                         continue;
 222                 }
 223
 224                 for (subrec=subnetlist; subrec; subrec=subrec->next) {
 225                         if (ip_equal(iface->ip, subrec->myip) &&
 226                             ip_equal(iface->nmask, subrec->mask_ip)) break;
 227                 }
 228
 229                 if (!subrec) {
 230                         /* it wasn't found! add it */
 231                         DEBUG(2,("Found new interface %s\n",
 232                                  inet_ntoa(iface->ip)));
 233                         subrec = make_normal_subnet(iface);
 234                         if (subrec)
 235                                 register_my_workgroup_one_subnet(subrec);
 236                 }
 237         }
 238
 239         /* find any interfaces that need deleting */
 240         for (subrec=subnetlist; subrec; subrec=subrec->next) {
 241                 for (n=iface_count() - 1; n >= 0; n--) {
 242                         struct interface *iface = get_interface(n);
 243                         if (ip_equal(iface->ip, subrec->myip) &&
 244                             ip_equal(iface->nmask, subrec->mask_ip)) break;
 245                 }
 246                 if (n == -1) {
 247                         /* oops, an interface has disapeared. This is
 248                          tricky, we don't dare actually free the
 249                          interface as it could be being used, so
 250                          instead we just wear the memory leak and
 251                          remove it from the list of interfaces without
 252                          freeing it */
 253                         DEBUG(2,("Deleting dead interface %s\n",
 254                                  inet_ntoa(subrec->myip)));
 255                         close_subnet(subrec);
 256                 }
 257         }
 258
 259         rescan_listen_set = True;
 260
 261         /* We need to shutdown if there are no subnets... */
 262         if (FIRST_SUBNET == NULL) {
 263                 DEBUG(0,("reload_interfaces: No subnets to listen to. Shutting down...\n"));
 264                 return True;
 265         }
 266         return False;
 267 }
 268
 269 /**************************************************************************** **
 270  Reload the services file.
 271  **************************************************************************** */
 272
 273 static BOOL reload_nmbd_services(BOOL test)
 274 {
 275         BOOL ret;
 276
 277         set_remote_machine_name("nmbd", False);
 278
 279         if ( lp_loaded() ) {
 280                 pstring fname;
 281                 pstrcpy( fname,lp_configfile());
 282                 if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) {
 283                         pstrcpy(dyn_CONFIGFILE,fname);
 284                         test = False;
 285                 }
 286         }
 287
 288         if ( test && !lp_file_list_changed() )
 289                 return(True);
 290
 291         ret = lp_load( dyn_CONFIGFILE, True , False, False);
 292
 293         /* perhaps the config filename is now set */
 294         if ( !test ) {
 295                 DEBUG( 3, ( "services not loaded\n" ) );
 296                 reload_nmbd_services( True );
 297         }
 298
 299         return(ret);
 300 }
 301
 302 /**************************************************************************** **
 303  * React on 'smbcontrol nmbd reload-config' in the same way as to SIGHUP
 304  * We use buf here to return BOOL result to process() when reload_interfaces()
 305  * detects that there are no subnets.
 306  **************************************************************************** */
 307
 308 static void msg_reload_nmbd_services(int msg_type, pid_t src, void *buf, size_t len)
 309 {
 310         write_browse_list( 0, True );
 311         dump_all_namelists();
 312         reload_nmbd_services( True );
 313         reopen_logs();
 314
 315         if(buf) {
 316                 /* We were called from process() */
 317                 /* If reload_interfaces() returned True */
 318                 /* we need to shutdown if there are no subnets... */
 319                 /* pass this info back to process() */
 320                 *((BOOL*)buf) = reload_interfaces(0);
 321         }
 322 }
 323
 324
 325 /**************************************************************************** **
 326  The main select loop.
 327  **************************************************************************** */
 328
 329 static void process(void)
 330 {
 331         BOOL run_election;
 332         BOOL no_subnets;
 333
 334         while( True ) {
 335                 time_t t = time(NULL);
 336
 337                 /* Check for internal messages */
 338
 339                 message_dispatch();
 340
 341                 /*
 342                  * Check all broadcast subnets to see if
 343                  * we need to run an election on any of them.
 344                  * (nmbd_elections.c)
 345                  */
 346
 347                 run_election = check_elections();
 348
 349                 /*
 350                  * Read incoming UDP packets.
 351                  * (nmbd_packets.c)
 352                  */
 353
 354                 if(listen_for_packets(run_election))
 355                         return;
 356
 357                 /*
 358                  * Handle termination inband.
 359                  */
 360
 361                 if (got_sig_term) {
 362                         got_sig_term = 0;
 363                         terminate();
 364                 }
 365
 366                 /*
 367                  * Process all incoming packets
 368                  * read above. This calls the success and
 369                  * failure functions registered when response
 370                  * packets arrrive, and also deals with request
 371                  * packets from other sources.
 372                  * (nmbd_packets.c)
 373                  */
 374
 375                 run_packet_queue();
 376
 377                 /*
 378                  * Run any elections - initiate becoming
 379                  * a local master browser if we have won.
 380                  * (nmbd_elections.c)
 381                  */
 382
 383                 run_elections(t);
 384
 385                 /*
 386                  * Send out any broadcast announcements
 387                  * of our server names. This also announces
 388                  * the workgroup name if we are a local
 389                  * master browser.
 390                  * (nmbd_sendannounce.c)
 391                  */
 392
 393                 announce_my_server_names(t);
 394
 395                 /*
 396                  * Send out any LanMan broadcast announcements
 397                  * of our server names.
 398                  * (nmbd_sendannounce.c)
 399                  */
 400
 401                 announce_my_lm_server_names(t);
 402
 403                 /*
 404                  * If we are a local master browser, periodically
 405                  * announce ourselves to the domain master browser.
 406                  * This also deals with syncronising the domain master
 407                  * browser server lists with ourselves as a local
 408                  * master browser.
 409                  * (nmbd_sendannounce.c)
 410                  */
 411
 412                 announce_myself_to_domain_master_browser(t);
 413
 414                 /*
 415                  * Fullfill any remote announce requests.
 416                  * (nmbd_sendannounce.c)
 417                  */
 418
 419                 announce_remote(t);
 420
 421                 /*
 422                  * Fullfill any remote browse sync announce requests.
 423                  * (nmbd_sendannounce.c)
 424                  */
 425
 426                 browse_sync_remote(t);
 427
 428                 /*
 429                  * Scan the broadcast subnets, and WINS client
 430                  * namelists and refresh any that need refreshing.
 431                  * (nmbd_mynames.c)
 432                  */
 433
 434                 refresh_my_names(t);
 435
 436                 /*
 437                  * Scan the subnet namelists and server lists and
 438                  * expire thos that have timed out.
 439                  * (nmbd.c)
 440                  */
 441
 442                 expire_names_and_servers(t);
 443
 444                 /*
 445                  * Write out a snapshot of our current browse list into
 446                  * the browse.dat file. This is used by smbd to service
 447                  * incoming NetServerEnum calls - used to synchronise
 448                  * browse lists over subnets.
 449                  * (nmbd_serverlistdb.c)
 450                  */
 451
 452                 write_browse_list(t, False);
 453
 454                 /*
 455                  * If we are a domain master browser, we have a list of
 456                  * local master browsers we should synchronise browse
 457                  * lists with (these are added by an incoming local
 458                  * master browser announcement packet). Expire any of
 459                  * these that are no longer current, and pull the server
 460                  * lists from each of these known local master browsers.
 461                  * (nmbd_browsesync.c)
 462                  */
 463
 464                 dmb_expire_and_sync_browser_lists(t);
 465
 466                 /*
 467                  * Check that there is a local master browser for our
 468                  * workgroup for all our broadcast subnets. If one
 469                  * is not found, start an election (which we ourselves
 470                  * may or may not participate in, depending on the
 471                  * setting of the 'local master' parameter.
 472                  * (nmbd_elections.c)
 473                  */
 474
 475                 check_master_browser_exists(t);
 476
 477                 /*
 478                  * If we are configured as a logon server, attempt to
 479                  * register the special NetBIOS names to become such
 480                  * (WORKGROUP<1c> name) on all broadcast subnets and
 481                  * with the WINS server (if used). If we are configured
 482                  * to become a domain master browser, attempt to register
 483                  * the special NetBIOS name (WORKGROUP<1b> name) to
 484                  * become such.
 485                  * (nmbd_become_dmb.c)
 486                  */
 487
 488                 add_domain_names(t);
 489
 490                 /*
 491                  * If we are a WINS server, do any timer dependent
 492                  * processing required.
 493                  * (nmbd_winsserver.c)
 494                  */
 495
 496                 initiate_wins_processing(t);
 497
 498                 /*
 499                  * If we are a domain master browser, attempt to contact the
 500                  * WINS server to get a list of all known WORKGROUPS/DOMAINS.
 501                  * This will only work to a Samba WINS server.
 502                  * (nmbd_browsesync.c)
 503                  */
 504
 505                 if (lp_enhanced_browsing())
 506                         collect_all_workgroup_names_from_wins_server(t);
 507
 508                 /*
 509                  * Go through the response record queue and time out or re-transmit
 510                  * and expired entries.
 511                  * (nmbd_packets.c)
 512                  */
 513
 514                 retransmit_or_expire_response_records(t);
 515
 516                 /*
 517                  * check to see if any remote browse sync child processes have completed
 518                  */
 519
 520                 sync_check_completion();
 521
 522                 /*
 523                  * regularly sync with any other DMBs we know about
 524                  */
 525
 526                 if (lp_enhanced_browsing())
 527                         sync_all_dmbs(t);
 528
 529                 /*
 530                  * clear the unexpected packet queue
 531                  */
 532
 533                 clear_unexpected(t);
 534
 535                 /*
 536                  * Reload the services file if we got a sighup.
 537                  */
 538
 539                 if(reload_after_sighup) {
 540                         DEBUG( 0, ( "Got SIGHUP dumping debug info.\n" ) );
 541                         msg_reload_nmbd_services(MSG_SMB_CONF_UPDATED, (pid_t) 0, (void*) &no_subnets, 0);
 542                         if(no_subnets)
 543                                 return;
 544                         reload_after_sighup = 0;
 545                 }
 546
 547                 /* check for new network interfaces */
 548
 549                 if(reload_interfaces(t))
 550                         return;
 551
 552                 /* free up temp memory */
 553                         lp_talloc_free();
 554         }
 555 }
 556
 557 /**************************************************************************** **
 558  Open the socket communication.
 559  **************************************************************************** */
 560
 561 static BOOL open_sockets(BOOL isdaemon, int port)
 562 {
 563         /*
 564          * The sockets opened here will be used to receive broadcast
 565          * packets *only*. Interface specific sockets are opened in
 566          * make_subnet() in namedbsubnet.c. Thus we bind to the
 567          * address "0.0.0.0". The parameter 'socket address' is
 568          * now deprecated.
 569          */
 570
 571         if ( isdaemon )
 572                 ClientNMB = open_socket_in(SOCK_DGRAM, port,
 573                                            0, interpret_addr(lp_socket_address()),
 574                                            True);
 575         else
 576                 ClientNMB = 0;
 577
 578         ClientDGRAM = open_socket_in(SOCK_DGRAM,DGRAM_PORT,3,0,True);
 579
 580         if ( ClientNMB == -1 )
 581                 return( False );
 582
 583         /* we are never interested in SIGPIPE */
 584         BlockSignals(True,SIGPIPE);
 585
 586         set_socket_options( ClientNMB,   "SO_BROADCAST" );
 587         set_socket_options( ClientDGRAM, "SO_BROADCAST" );
 588
 589         DEBUG( 3, ( "open_sockets: Broadcast sockets opened.\n" ) );
 590         return( True );
 591 }
 592
 593 /**************************************************************************** **
 594  main program
 595  **************************************************************************** */
 596  int main(int argc, const char *argv[])
 597 {
 598         pstring logfile;
 599         static BOOL opt_interactive;
 600         poptContext pc;
 601         int opt;
 602         struct poptOption long_options[] = {
 603         POPT_AUTOHELP
 604         {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon(default)" },
 605         {"interactive", 'i', POPT_ARG_VAL, &opt_interactive, True, "Run interactive (not a daemon)" },
 606         {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" },
 607         {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
 608         {"hosts", 'H', POPT_ARG_STRING, dyn_LMHOSTSFILE, 'H', "Load a netbios hosts file"},
 609         {"port", 'p', POPT_ARG_INT, &global_nmb_port, NMB_PORT, "Listen on the specified port" },
 610         POPT_COMMON_SAMBA
 611         { NULL }
 612         };
 613
 614         global_nmb_port = NMB_PORT;
 615
 616         pc = poptGetContext("nmbd", argc, argv, long_options, 0);
 617         while ((opt = poptGetNextOpt(pc)) != -1) ;
 618         poptFreeContext(pc);
 619
 620         global_in_nmbd = True;
 621
 622         StartupTime = time(NULL);
 623
 624         sys_srandom(time(NULL) ^ sys_getpid());
 625
 626         slprintf(logfile, sizeof(logfile)-1, "%s/log.nmbd", dyn_LOGFILEBASE);
 627         lp_set_logfile(logfile);
 628
 629         fault_setup((void (*)(void *))fault_continue );
 630
 631         /* POSIX demands that signals are inherited. If the invoking process has
 632          * these signals masked, we will have problems, as we won't receive them. */
 633         BlockSignals(False, SIGHUP);
 634         BlockSignals(False, SIGUSR1);
 635         BlockSignals(False, SIGTERM);
 636
 637         CatchSignal( SIGHUP,  SIGNAL_CAST sig_hup );
 638         CatchSignal( SIGTERM, SIGNAL_CAST sig_term );
 639
 640 #if defined(SIGFPE)
 641         /* we are never interested in SIGFPE */
 642         BlockSignals(True,SIGFPE);
 643 #endif
 644
 645         /* We no longer use USR2... */
 646 #if defined(SIGUSR2)
 647         BlockSignals(True, SIGUSR2);
 648 #endif
 649
 650         if ( opt_interactive ) {
 651                 Fork = False;
 652                 log_stdout = True;
 653         }
 654
 655         if ( log_stdout && Fork ) {
 656                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 657                 exit(1);
 658         }
 659
 660         setup_logging( argv[0], log_stdout );
 661
 662         reopen_logs();
 663
 664         DEBUG( 0, ( "Netbios nameserver version %s started.\n", SAMBA_VERSION_STRING) );
 665         DEBUGADD( 0, ( "Copyright Andrew Tridgell and the Samba Team 1994-2003\n" ) );
 666
 667         if ( !reload_nmbd_services(False) )
 668                 return(-1);
 669
 670         if(!init_names())
 671                 return -1;
 672
 673         reload_nmbd_services( True );
 674
 675         if (strequal(lp_workgroup(),"*")) {
 676                 DEBUG(0,("ERROR: a workgroup name of * is no longer supported\n"));
 677                 exit(1);
 678         }
 679
 680         set_samba_nb_type();
 681
 682         if (!is_daemon && !is_a_socket(0)) {
 683                 DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 684                 is_daemon = True;
 685         }
 686
 687         if (is_daemon && !opt_interactive) {
 688                 DEBUG( 2, ( "Becoming a daemon.\n" ) );
 689                 become_daemon(Fork);
 690         }
 691
 692 #if HAVE_SETPGID
 693         /*
 694          * If we're interactive we want to set our own process group for
 695          * signal management.
 696          */
 697         if (opt_interactive)
 698                 setpgid( (pid_t)0, (pid_t)0 );
 699 #endif
 700
 701 #ifndef SYNC_DNS
 702         /* Setup the async dns. We do it here so it doesn't have all the other
 703                 stuff initialised and thus chewing memory and sockets */
 704         if(lp_we_are_a_wins_server() && lp_dns_proxy()) {
 705                 start_async_dns();
 706         }
 707 #endif
 708
 709         if (!directory_exist(lp_lockdir(), NULL)) {
 710                 mkdir(lp_lockdir(), 0755);
 711         }
 712
 713         pidfile_create("nmbd");
 714         message_init();
 715         message_register(MSG_FORCE_ELECTION, nmbd_message_election);
 716         message_register(MSG_WINS_NEW_ENTRY, nmbd_wins_new_entry);
 717         message_register(MSG_SHUTDOWN, nmbd_terminate);
 718         message_register(MSG_SMB_CONF_UPDATED, msg_reload_nmbd_services);
 719
 720         DEBUG( 3, ( "Opening sockets %d\n", global_nmb_port ) );
 721
 722         if ( !open_sockets( is_daemon, global_nmb_port ) ) {
 723                 kill_async_dns_child();
 724                 return 1;
 725         }
 726
 727         /* Determine all the IP addresses we have. */
 728         load_interfaces();
 729
 730         /* Create an nmbd subnet record for each of the above. */
 731         if( False == create_subnets() ) {
 732                 DEBUG(0,("ERROR: Failed when creating subnet lists. Exiting.\n"));
 733                 kill_async_dns_child();
 734                 exit(1);
 735         }
 736
 737         /* Load in any static local names. */
 738         load_lmhosts_file(dyn_LMHOSTSFILE);
 739         DEBUG(3,("Loaded hosts file %s\n", dyn_LMHOSTSFILE));
 740
 741         /* If we are acting as a WINS server, initialise data structures. */
 742         if( !initialise_wins() ) {
 743                 DEBUG( 0, ( "nmbd: Failed when initialising WINS server.\n" ) );
 744                 kill_async_dns_child();
 745                 exit(1);
 746         }
 747
 748         /*
 749          * Register nmbd primary workgroup and nmbd names on all
 750          * the broadcast subnets, and on the WINS server (if specified).
 751          * Also initiate the startup of our primary workgroup (start
 752          * elections if we are setup as being able to be a local
 753          * master browser.
 754          */
 755
 756         if( False == register_my_workgroup_and_names() ) {
 757                 DEBUG(0,("ERROR: Failed when creating my my workgroup. Exiting.\n"));
 758                 kill_async_dns_child();
 759                 exit(1);
 760         }
 761
 762         /* We can only take signals in the select. */
 763         BlockSignals( True, SIGTERM );
 764
 765         process();
 766
 767         if (dbf)
 768                 x_fclose(dbf);
 769         kill_async_dns_child();
 770         return(0);
 771 }