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 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 */
  22
  23 #include "includes.h"
  24 #include "librpc/gen_ndr/messaging.h"
  25
  26 int ClientNMB       = -1;
  27 int ClientDGRAM     = -1;
  28 int global_nmb_port = -1;
  29
  30 extern bool rescan_listen_set;
  31 extern bool global_in_nmbd;
  32
  33 extern bool override_logfile;
  34
  35 /* have we found LanMan clients yet? */
  36 bool found_lm_clients = False;
  37
  38 /* what server type are we currently */
  39
  40 time_t StartupTime = 0;
  41
  42 struct event_context *nmbd_event_context(void)
  43 {
  44         static struct event_context *ctx;
  45
  46         if (!ctx && !(ctx = event_context_init(NULL))) {
  47                 smb_panic("Could not init nmbd event context");
  48         }
  49         return ctx;
  50 }
  51
  52 struct messaging_context *nmbd_messaging_context(void)
  53 {
  54         static struct messaging_context *ctx;
  55
  56         if (ctx == NULL) {
  57                 ctx = messaging_init(NULL, procid_self(),
  58                                      nmbd_event_context());
  59         }
  60         if (ctx == NULL) {
  61                 DEBUG(0, ("Could not init nmbd messaging context.\n"));
  62         }
  63         return ctx;
  64 }
  65
  66 /**************************************************************************** **
  67  Handle a SIGTERM in band.
  68  **************************************************************************** */
  69
  70 static void terminate(void)
  71 {
  72         DEBUG(0,("Got SIGTERM: going down...\n"));
  73
  74         /* Write out wins.dat file if samba is a WINS server */
  75         wins_write_database(0,False);
  76
  77         /* Remove all SELF registered names from WINS */
  78         release_wins_names();
  79
  80         /* Announce all server entries as 0 time-to-live, 0 type. */
  81         announce_my_servers_removed();
  82
  83         /* If there was an async dns child - kill it. */
  84         kill_async_dns_child();
  85
  86         gencache_stabilize();
  87         serverid_deregister(procid_self());
  88
  89         pidfile_unlink();
  90
  91         exit(0);
  92 }
  93
  94 static void nmbd_sig_term_handler(struct tevent_context *ev,
  95                                   struct tevent_signal *se,
  96                                   int signum,
  97                                   int count,
  98                                   void *siginfo,
  99                                   void *private_data)
 100 {
 101         terminate();
 102 }
 103
 104 static bool nmbd_setup_sig_term_handler(void)
 105 {
 106         struct tevent_signal *se;
 107
 108         se = tevent_add_signal(nmbd_event_context(),
 109                                nmbd_event_context(),
 110                                SIGTERM, 0,
 111                                nmbd_sig_term_handler,
 112                                NULL);
 113         if (!se) {
 114                 DEBUG(0,("failed to setup SIGTERM handler"));
 115                 return false;
 116         }
 117
 118         return true;
 119 }
 120
 121 static void msg_reload_nmbd_services(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 static void nmbd_sig_hup_handler(struct tevent_context *ev,
 128                                  struct tevent_signal *se,
 129                                  int signum,
 130                                  int count,
 131                                  void *siginfo,
 132                                  void *private_data)
 133 {
 134         DEBUG(0,("Got SIGHUP dumping debug info.\n"));
 135         msg_reload_nmbd_services(nmbd_messaging_context(),
 136                                  NULL, MSG_SMB_CONF_UPDATED,
 137                                  procid_self(), NULL);
 138 }
 139
 140 static bool nmbd_setup_sig_hup_handler(void)
 141 {
 142         struct tevent_signal *se;
 143
 144         se = tevent_add_signal(nmbd_event_context(),
 145                                nmbd_event_context(),
 146                                SIGHUP, 0,
 147                                nmbd_sig_hup_handler,
 148                                NULL);
 149         if (!se) {
 150                 DEBUG(0,("failed to setup SIGHUP handler"));
 151                 return false;
 152         }
 153
 154         return true;
 155 }
 156
 157 /**************************************************************************** **
 158  Handle a SHUTDOWN message from smbcontrol.
 159  **************************************************************************** */
 160
 161 static void nmbd_terminate(struct messaging_context *msg,
 162                            void *private_data,
 163                            uint32_t msg_type,
 164                            struct server_id server_id,
 165                            DATA_BLOB *data)
 166 {
 167         terminate();
 168 }
 169
 170 /**************************************************************************** **
 171  Possibly continue after a fault.
 172  **************************************************************************** */
 173
 174 static void fault_continue(void)
 175 {
 176         dump_core();
 177 }
 178
 179 /**************************************************************************** **
 180  Expire old names from the namelist and server list.
 181  **************************************************************************** */
 182
 183 static void expire_names_and_servers(time_t t)
 184 {
 185         static time_t lastrun = 0;
 186
 187         if ( !lastrun )
 188                 lastrun = t;
 189         if ( t < (lastrun + 5) )
 190                 return;
 191         lastrun = t;
 192
 193         /*
 194          * Expire any timed out names on all the broadcast
 195          * subnets and those registered with the WINS server.
 196          * (nmbd_namelistdb.c)
 197          */
 198
 199         expire_names(t);
 200
 201         /*
 202          * Go through all the broadcast subnets and for each
 203          * workgroup known on that subnet remove any expired
 204          * server names. If a workgroup has an empty serverlist
 205          * and has itself timed out then remove the workgroup.
 206          * (nmbd_workgroupdb.c)
 207          */
 208
 209         expire_workgroups_and_servers(t);
 210 }
 211
 212 /************************************************************************** **
 213  Reload the list of network interfaces.
 214  Doesn't return until a network interface is up.
 215  ************************************************************************** */
 216
 217 static void reload_interfaces(time_t t)
 218 {
 219         static time_t lastt;
 220         int n;
 221         bool print_waiting_msg = true;
 222         struct subnet_record *subrec;
 223
 224         if (t && ((t - lastt) < NMBD_INTERFACES_RELOAD)) {
 225                 return;
 226         }
 227
 228         lastt = t;
 229
 230         if (!interfaces_changed()) {
 231                 return;
 232         }
 233
 234   try_again:
 235
 236         /* the list of probed interfaces has changed, we may need to add/remove
 237            some subnets */
 238         load_interfaces();
 239
 240         /* find any interfaces that need adding */
 241         for (n=iface_count() - 1; n >= 0; n--) {
 242                 char str[INET6_ADDRSTRLEN];
 243                 const struct interface *iface = get_interface(n);
 244                 struct in_addr ip, nmask;
 245
 246                 if (!iface) {
 247                         DEBUG(2,("reload_interfaces: failed to get interface %d\n", n));
 248                         continue;
 249                 }
 250
 251                 /* Ensure we're only dealing with IPv4 here. */
 252                 if (iface->ip.ss_family != AF_INET) {
 253                         DEBUG(2,("reload_interfaces: "
 254                                 "ignoring non IPv4 interface.\n"));
 255                         continue;
 256                 }
 257
 258                 ip = ((struct sockaddr_in *)(void *)&iface->ip)->sin_addr;
 259                 nmask = ((struct sockaddr_in *)(void *)
 260                          &iface->netmask)->sin_addr;
 261
 262                 /*
 263                  * We don't want to add a loopback interface, in case
 264                  * someone has added 127.0.0.1 for smbd, nmbd needs to
 265                  * ignore it here. JRA.
 266                  */
 267
 268                 if (is_loopback_addr((struct sockaddr *)(void *)&iface->ip)) {
 269                         DEBUG(2,("reload_interfaces: Ignoring loopback "
 270                                 "interface %s\n",
 271                                 print_sockaddr(str, sizeof(str), &iface->ip) ));
 272                         continue;
 273                 }
 274
 275                 for (subrec=subnetlist; subrec; subrec=subrec->next) {
 276                         if (ip_equal_v4(ip, subrec->myip) &&
 277                             ip_equal_v4(nmask, subrec->mask_ip)) {
 278                                 break;
 279                         }
 280                 }
 281
 282                 if (!subrec) {
 283                         /* it wasn't found! add it */
 284                         DEBUG(2,("Found new interface %s\n",
 285                                  print_sockaddr(str,
 286                                          sizeof(str), &iface->ip) ));
 287                         subrec = make_normal_subnet(iface);
 288                         if (subrec)
 289                                 register_my_workgroup_one_subnet(subrec);
 290                 }
 291         }
 292
 293         /* find any interfaces that need deleting */
 294         for (subrec=subnetlist; subrec; subrec=subrec->next) {
 295                 for (n=iface_count() - 1; n >= 0; n--) {
 296                         struct interface *iface = get_interface(n);
 297                         struct in_addr ip, nmask;
 298                         if (!iface) {
 299                                 continue;
 300                         }
 301                         /* Ensure we're only dealing with IPv4 here. */
 302                         if (iface->ip.ss_family != AF_INET) {
 303                                 DEBUG(2,("reload_interfaces: "
 304                                         "ignoring non IPv4 interface.\n"));
 305                                 continue;
 306                         }
 307                         ip = ((struct sockaddr_in *)(void *)
 308                               &iface->ip)->sin_addr;
 309                         nmask = ((struct sockaddr_in *)(void *)
 310                                  &iface->netmask)->sin_addr;
 311                         if (ip_equal_v4(ip, subrec->myip) &&
 312                             ip_equal_v4(nmask, subrec->mask_ip)) {
 313                                 break;
 314                         }
 315                 }
 316                 if (n == -1) {
 317                         /* oops, an interface has disapeared. This is
 318                          tricky, we don't dare actually free the
 319                          interface as it could be being used, so
 320                          instead we just wear the memory leak and
 321                          remove it from the list of interfaces without
 322                          freeing it */
 323                         DEBUG(2,("Deleting dead interface %s\n",
 324                                  inet_ntoa(subrec->myip)));
 325                         close_subnet(subrec);
 326                 }
 327         }
 328
 329         rescan_listen_set = True;
 330
 331         /* We need to wait if there are no subnets... */
 332         if (FIRST_SUBNET == NULL) {
 333                 void (*saved_handler)(int);
 334
 335                 if (print_waiting_msg) {
 336                         DEBUG(0,("reload_interfaces: "
 337                                 "No subnets to listen to. Waiting..\n"));
 338                         print_waiting_msg = false;
 339                 }
 340
 341                 /*
 342                  * Whilst we're waiting for an interface, allow SIGTERM to
 343                  * cause us to exit.
 344                  */
 345                 saved_handler = CatchSignal(SIGTERM, SIG_DFL);
 346
 347                 /* We only count IPv4, non-loopback interfaces here. */
 348                 while (iface_count_v4_nl() == 0) {
 349                         sleep(5);
 350                         load_interfaces();
 351                 }
 352
 353                 CatchSignal(SIGTERM, saved_handler);
 354
 355                 /*
 356                  * We got an interface, go back to blocking term.
 357                  */
 358
 359                 goto try_again;
 360         }
 361 }
 362
 363 /**************************************************************************** **
 364  Reload the services file.
 365  **************************************************************************** */
 366
 367 static bool reload_nmbd_services(bool test)
 368 {
 369         bool ret;
 370
 371         set_remote_machine_name("nmbd", False);
 372
 373         if ( lp_loaded() ) {
 374                 const char *fname = lp_configfile();
 375                 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
 376                         set_dyn_CONFIGFILE(fname);
 377                         test = False;
 378                 }
 379         }
 380
 381         if ( test && !lp_file_list_changed() )
 382                 return(True);
 383
 384         ret = lp_load(get_dyn_CONFIGFILE(), True , False, False, True);
 385
 386         /* perhaps the config filename is now set */
 387         if ( !test ) {
 388                 DEBUG( 3, ( "services not loaded\n" ) );
 389                 reload_nmbd_services( True );
 390         }
 391
 392         return(ret);
 393 }
 394
 395 /**************************************************************************** **
 396  * React on 'smbcontrol nmbd reload-config' in the same way as to SIGHUP
 397  **************************************************************************** */
 398
 399 static void msg_reload_nmbd_services(struct messaging_context *msg,
 400                                      void *private_data,
 401                                      uint32_t msg_type,
 402                                      struct server_id server_id,
 403                                      DATA_BLOB *data)
 404 {
 405         write_browse_list( 0, True );
 406         dump_all_namelists();
 407         reload_nmbd_services( True );
 408         reopen_logs();
 409         reload_interfaces(0);
 410 }
 411
 412 static void msg_nmbd_send_packet(struct messaging_context *msg,
 413                                  void *private_data,
 414                                  uint32_t msg_type,
 415                                  struct server_id src,
 416                                  DATA_BLOB *data)
 417 {
 418         struct packet_struct *p = (struct packet_struct *)data->data;
 419         struct subnet_record *subrec;
 420         struct sockaddr_storage ss;
 421         const struct sockaddr_storage *pss;
 422         const struct in_addr *local_ip;
 423
 424         DEBUG(10, ("Received send_packet from %u\n", (unsigned int)procid_to_pid(&src)));
 425
 426         if (data->length != sizeof(struct packet_struct)) {
 427                 DEBUG(2, ("Discarding invalid packet length from %u\n",
 428                           (unsigned int)procid_to_pid(&src)));
 429                 return;
 430         }
 431
 432         if ((p->packet_type != NMB_PACKET) &&
 433             (p->packet_type != DGRAM_PACKET)) {
 434                 DEBUG(2, ("Discarding invalid packet type from %u: %d\n",
 435                           (unsigned int)procid_to_pid(&src), p->packet_type));
 436                 return;
 437         }
 438
 439         in_addr_to_sockaddr_storage(&ss, p->ip);
 440         pss = iface_ip((struct sockaddr *)(void *)&ss);
 441
 442         if (pss == NULL) {
 443                 DEBUG(2, ("Could not find ip for packet from %u\n",
 444                           (unsigned int)procid_to_pid(&src)));
 445                 return;
 446         }
 447
 448         local_ip = &((const struct sockaddr_in *)pss)->sin_addr;
 449         subrec = FIRST_SUBNET;
 450
 451         p->recv_fd = -1;
 452         p->send_fd = (p->packet_type == NMB_PACKET) ?
 453                 subrec->nmb_sock : subrec->dgram_sock;
 454
 455         for (subrec = FIRST_SUBNET; subrec != NULL;
 456              subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
 457                 if (ip_equal_v4(*local_ip, subrec->myip)) {
 458                         p->send_fd = (p->packet_type == NMB_PACKET) ?
 459                                 subrec->nmb_sock : subrec->dgram_sock;
 460                         break;
 461                 }
 462         }
 463
 464         if (p->packet_type == DGRAM_PACKET) {
 465                 p->port = 138;
 466                 p->packet.dgram.header.source_ip.s_addr = local_ip->s_addr;
 467                 p->packet.dgram.header.source_port = 138;
 468         }
 469
 470         send_packet(p);
 471 }
 472
 473 /**************************************************************************** **
 474  The main select loop.
 475  **************************************************************************** */
 476
 477 static void process(void)
 478 {
 479         bool run_election;
 480
 481         while( True ) {
 482                 time_t t = time(NULL);
 483                 TALLOC_CTX *frame = talloc_stackframe();
 484
 485                 /*
 486                  * Check all broadcast subnets to see if
 487                  * we need to run an election on any of them.
 488                  * (nmbd_elections.c)
 489                  */
 490
 491                 run_election = check_elections();
 492
 493                 /*
 494                  * Read incoming UDP packets.
 495                  * (nmbd_packets.c)
 496                  */
 497
 498                 if(listen_for_packets(run_election)) {
 499                         TALLOC_FREE(frame);
 500                         return;
 501                 }
 502
 503                 /*
 504                  * Process all incoming packets
 505                  * read above. This calls the success and
 506                  * failure functions registered when response
 507                  * packets arrrive, and also deals with request
 508                  * packets from other sources.
 509                  * (nmbd_packets.c)
 510                  */
 511
 512                 run_packet_queue();
 513
 514                 /*
 515                  * Run any elections - initiate becoming
 516                  * a local master browser if we have won.
 517                  * (nmbd_elections.c)
 518                  */
 519
 520                 run_elections(t);
 521
 522                 /*
 523                  * Send out any broadcast announcements
 524                  * of our server names. This also announces
 525                  * the workgroup name if we are a local
 526                  * master browser.
 527                  * (nmbd_sendannounce.c)
 528                  */
 529
 530                 announce_my_server_names(t);
 531
 532                 /*
 533                  * Send out any LanMan broadcast announcements
 534                  * of our server names.
 535                  * (nmbd_sendannounce.c)
 536                  */
 537
 538                 announce_my_lm_server_names(t);
 539
 540                 /*
 541                  * If we are a local master browser, periodically
 542                  * announce ourselves to the domain master browser.
 543                  * This also deals with syncronising the domain master
 544                  * browser server lists with ourselves as a local
 545                  * master browser.
 546                  * (nmbd_sendannounce.c)
 547                  */
 548
 549                 announce_myself_to_domain_master_browser(t);
 550
 551                 /*
 552                  * Fullfill any remote announce requests.
 553                  * (nmbd_sendannounce.c)
 554                  */
 555
 556                 announce_remote(t);
 557
 558                 /*
 559                  * Fullfill any remote browse sync announce requests.
 560                  * (nmbd_sendannounce.c)
 561                  */
 562
 563                 browse_sync_remote(t);
 564
 565                 /*
 566                  * Scan the broadcast subnets, and WINS client
 567                  * namelists and refresh any that need refreshing.
 568                  * (nmbd_mynames.c)
 569                  */
 570
 571                 refresh_my_names(t);
 572
 573                 /*
 574                  * Scan the subnet namelists and server lists and
 575                  * expire thos that have timed out.
 576                  * (nmbd.c)
 577                  */
 578
 579                 expire_names_and_servers(t);
 580
 581                 /*
 582                  * Write out a snapshot of our current browse list into
 583                  * the browse.dat file. This is used by smbd to service
 584                  * incoming NetServerEnum calls - used to synchronise
 585                  * browse lists over subnets.
 586                  * (nmbd_serverlistdb.c)
 587                  */
 588
 589                 write_browse_list(t, False);
 590
 591                 /*
 592                  * If we are a domain master browser, we have a list of
 593                  * local master browsers we should synchronise browse
 594                  * lists with (these are added by an incoming local
 595                  * master browser announcement packet). Expire any of
 596                  * these that are no longer current, and pull the server
 597                  * lists from each of these known local master browsers.
 598                  * (nmbd_browsesync.c)
 599                  */
 600
 601                 dmb_expire_and_sync_browser_lists(t);
 602
 603                 /*
 604                  * Check that there is a local master browser for our
 605                  * workgroup for all our broadcast subnets. If one
 606                  * is not found, start an election (which we ourselves
 607                  * may or may not participate in, depending on the
 608                  * setting of the 'local master' parameter.
 609                  * (nmbd_elections.c)
 610                  */
 611
 612                 check_master_browser_exists(t);
 613
 614                 /*
 615                  * If we are configured as a logon server, attempt to
 616                  * register the special NetBIOS names to become such
 617                  * (WORKGROUP<1c> name) on all broadcast subnets and
 618                  * with the WINS server (if used). If we are configured
 619                  * to become a domain master browser, attempt to register
 620                  * the special NetBIOS name (WORKGROUP<1b> name) to
 621                  * become such.
 622                  * (nmbd_become_dmb.c)
 623                  */
 624
 625                 add_domain_names(t);
 626
 627                 /*
 628                  * If we are a WINS server, do any timer dependent
 629                  * processing required.
 630                  * (nmbd_winsserver.c)
 631                  */
 632
 633                 initiate_wins_processing(t);
 634
 635                 /*
 636                  * If we are a domain master browser, attempt to contact the
 637                  * WINS server to get a list of all known WORKGROUPS/DOMAINS.
 638                  * This will only work to a Samba WINS server.
 639                  * (nmbd_browsesync.c)
 640                  */
 641
 642                 if (lp_enhanced_browsing())
 643                         collect_all_workgroup_names_from_wins_server(t);
 644
 645                 /*
 646                  * Go through the response record queue and time out or re-transmit
 647                  * and expired entries.
 648                  * (nmbd_packets.c)
 649                  */
 650
 651                 retransmit_or_expire_response_records(t);
 652
 653                 /*
 654                  * check to see if any remote browse sync child processes have completed
 655                  */
 656
 657                 sync_check_completion();
 658
 659                 /*
 660                  * regularly sync with any other DMBs we know about
 661                  */
 662
 663                 if (lp_enhanced_browsing())
 664                         sync_all_dmbs(t);
 665
 666                 /*
 667                  * clear the unexpected packet queue
 668                  */
 669
 670                 clear_unexpected(t);
 671
 672                 /* check for new network interfaces */
 673
 674                 reload_interfaces(t);
 675
 676                 /* free up temp memory */
 677                 TALLOC_FREE(frame);
 678         }
 679 }
 680
 681 /**************************************************************************** **
 682  Open the socket communication.
 683  **************************************************************************** */
 684
 685 static bool open_sockets(bool isdaemon, int port)
 686 {
 687         struct sockaddr_storage ss;
 688         const char *sock_addr = lp_socket_address();
 689
 690         /*
 691          * The sockets opened here will be used to receive broadcast
 692          * packets *only*. Interface specific sockets are opened in
 693          * make_subnet() in namedbsubnet.c. Thus we bind to the
 694          * address "0.0.0.0". The parameter 'socket address' is
 695          * now deprecated.
 696          */
 697
 698         if (!interpret_string_addr(&ss, sock_addr,
 699                                 AI_NUMERICHOST|AI_PASSIVE)) {
 700                 DEBUG(0,("open_sockets: unable to get socket address "
 701                         "from string %s", sock_addr));
 702                 return false;
 703         }
 704         if (ss.ss_family != AF_INET) {
 705                 DEBUG(0,("open_sockets: unable to use IPv6 socket"
 706                         "%s in nmbd\n",
 707                         sock_addr));
 708                 return false;
 709         }
 710
 711         if (isdaemon) {
 712                 ClientNMB = open_socket_in(SOCK_DGRAM, port,
 713                                            0, &ss,
 714                                            true);
 715         } else {
 716                 ClientNMB = 0;
 717         }
 718
 719         if (ClientNMB == -1) {
 720                 return false;
 721         }
 722
 723         ClientDGRAM = open_socket_in(SOCK_DGRAM, DGRAM_PORT,
 724                                            3, &ss,
 725                                            true);
 726
 727         if (ClientDGRAM == -1) {
 728                 if (ClientNMB != 0) {
 729                         close(ClientNMB);
 730                 }
 731                 return false;
 732         }
 733
 734         /* we are never interested in SIGPIPE */
 735         BlockSignals(True,SIGPIPE);
 736
 737         set_socket_options( ClientNMB,   "SO_BROADCAST" );
 738         set_socket_options( ClientDGRAM, "SO_BROADCAST" );
 739
 740         /* Ensure we're non-blocking. */
 741         set_blocking( ClientNMB, False);
 742         set_blocking( ClientDGRAM, False);
 743
 744         DEBUG( 3, ( "open_sockets: Broadcast sockets opened.\n" ) );
 745         return( True );
 746 }
 747
 748 /**************************************************************************** **
 749  main program
 750  **************************************************************************** */
 751
 752  int main(int argc, const char *argv[])
 753 {
 754         static bool is_daemon;
 755         static bool opt_interactive;
 756         static bool Fork = true;
 757         static bool no_process_group;
 758         static bool log_stdout;
 759         poptContext pc;
 760         char *p_lmhosts = NULL;
 761         int opt;
 762         enum {
 763                 OPT_DAEMON = 1000,
 764                 OPT_INTERACTIVE,
 765                 OPT_FORK,
 766                 OPT_NO_PROCESS_GROUP,
 767                 OPT_LOG_STDOUT
 768         };
 769         struct poptOption long_options[] = {
 770         POPT_AUTOHELP
 771         {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon(default)" },
 772         {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)" },
 773         {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools & etc)" },
 774         {"no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
 775         {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
 776         {"hosts", 'H', POPT_ARG_STRING, &p_lmhosts, 'H', "Load a netbios hosts file"},
 777         {"port", 'p', POPT_ARG_INT, &global_nmb_port, NMB_PORT, "Listen on the specified port" },
 778         POPT_COMMON_SAMBA
 779         { NULL }
 780         };
 781         TALLOC_CTX *frame = talloc_stackframe(); /* Setup tos. */
 782         NTSTATUS status;
 783
 784         load_case_tables();
 785
 786         global_nmb_port = NMB_PORT;
 787
 788         pc = poptGetContext("nmbd", argc, argv, long_options, 0);
 789         while ((opt = poptGetNextOpt(pc)) != -1) {
 790                 switch (opt) {
 791                 case OPT_DAEMON:
 792                         is_daemon = true;
 793                         break;
 794                 case OPT_INTERACTIVE:
 795                         opt_interactive = true;
 796                         break;
 797                 case OPT_FORK:
 798                         Fork = false;
 799                         break;
 800                 case OPT_NO_PROCESS_GROUP:
 801                         no_process_group = true;
 802                         break;
 803                 case OPT_LOG_STDOUT:
 804                         log_stdout = true;
 805                         break;
 806                 default:
 807                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
 808                                   poptBadOption(pc, 0), poptStrerror(opt));
 809                         poptPrintUsage(pc, stderr, 0);
 810                         exit(1);
 811                 }
 812         };
 813         poptFreeContext(pc);
 814
 815         global_in_nmbd = true;
 816
 817         StartupTime = time(NULL);
 818
 819         sys_srandom(time(NULL) ^ sys_getpid());
 820
 821         if (!override_logfile) {
 822                 char *lfile = NULL;
 823                 if (asprintf(&lfile, "%s/log.nmbd", get_dyn_LOGFILEBASE()) < 0) {
 824                         exit(1);
 825                 }
 826                 lp_set_logfile(lfile);
 827                 SAFE_FREE(lfile);
 828         }
 829
 830         fault_setup((void (*)(void *))fault_continue );
 831         dump_core_setup("nmbd");
 832
 833         /* POSIX demands that signals are inherited. If the invoking process has
 834          * these signals masked, we will have problems, as we won't receive them. */
 835         BlockSignals(False, SIGHUP);
 836         BlockSignals(False, SIGUSR1);
 837         BlockSignals(False, SIGTERM);
 838
 839 #if defined(SIGFPE)
 840         /* we are never interested in SIGFPE */
 841         BlockSignals(True,SIGFPE);
 842 #endif
 843
 844         /* We no longer use USR2... */
 845 #if defined(SIGUSR2)
 846         BlockSignals(True, SIGUSR2);
 847 #endif
 848
 849         if ( opt_interactive ) {
 850                 Fork = False;
 851                 log_stdout = True;
 852         }
 853
 854         if ( log_stdout && Fork ) {
 855                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 856                 exit(1);
 857         }
 858
 859         setup_logging( argv[0], log_stdout );
 860
 861         reopen_logs();
 862
 863         DEBUG(0,("nmbd version %s started.\n", samba_version_string()));
 864         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
 865
 866         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
 867                 DEBUG(0, ("error opening config file\n"));
 868                 exit(1);
 869         }
 870
 871         if (nmbd_messaging_context() == NULL) {
 872                 return 1;
 873         }
 874
 875         if ( !reload_nmbd_services(False) )
 876                 return(-1);
 877
 878         if(!init_names())
 879                 return -1;
 880
 881         reload_nmbd_services( True );
 882
 883         if (strequal(lp_workgroup(),"*")) {
 884                 DEBUG(0,("ERROR: a workgroup name of * is no longer supported\n"));
 885                 exit(1);
 886         }
 887
 888         set_samba_nb_type();
 889
 890         if (!is_daemon && !is_a_socket(0)) {
 891                 DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 892                 is_daemon = True;
 893         }
 894
 895         if (is_daemon && !opt_interactive) {
 896                 DEBUG( 2, ( "Becoming a daemon.\n" ) );
 897                 become_daemon(Fork, no_process_group, log_stdout);
 898         }
 899
 900 #if HAVE_SETPGID
 901         /*
 902          * If we're interactive we want to set our own process group for
 903          * signal management.
 904          */
 905         if (opt_interactive && !no_process_group)
 906                 setpgid( (pid_t)0, (pid_t)0 );
 907 #endif
 908
 909         if (nmbd_messaging_context() == NULL) {
 910                 return 1;
 911         }
 912
 913 #ifndef SYNC_DNS
 914         /* Setup the async dns. We do it here so it doesn't have all the other
 915                 stuff initialised and thus chewing memory and sockets */
 916         if(lp_we_are_a_wins_server() && lp_dns_proxy()) {
 917                 start_async_dns();
 918         }
 919 #endif
 920
 921         if (!directory_exist(lp_lockdir())) {
 922                 mkdir(lp_lockdir(), 0755);
 923         }
 924
 925         pidfile_create("nmbd");
 926
 927         status = reinit_after_fork(nmbd_messaging_context(),
 928                                    nmbd_event_context(),
 929                                    procid_self(), false);
 930
 931         if (!NT_STATUS_IS_OK(status)) {
 932                 DEBUG(0,("reinit_after_fork() failed\n"));
 933                 exit(1);
 934         }
 935
 936         if (!nmbd_setup_sig_term_handler())
 937                 exit(1);
 938         if (!nmbd_setup_sig_hup_handler())
 939                 exit(1);
 940
 941         /* get broadcast messages */
 942
 943         if (!serverid_register(procid_self(),
 944                                FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
 945                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
 946                 exit(1);
 947         }
 948
 949         messaging_register(nmbd_messaging_context(), NULL,
 950                            MSG_FORCE_ELECTION, nmbd_message_election);
 951 #if 0
 952         /* Until winsrepl is done. */
 953         messaging_register(nmbd_messaging_context(), NULL,
 954                            MSG_WINS_NEW_ENTRY, nmbd_wins_new_entry);
 955 #endif
 956         messaging_register(nmbd_messaging_context(), NULL,
 957                            MSG_SHUTDOWN, nmbd_terminate);
 958         messaging_register(nmbd_messaging_context(), NULL,
 959                            MSG_SMB_CONF_UPDATED, msg_reload_nmbd_services);
 960         messaging_register(nmbd_messaging_context(), NULL,
 961                            MSG_SEND_PACKET, msg_nmbd_send_packet);
 962
 963         TimeInit();
 964
 965         DEBUG( 3, ( "Opening sockets %d\n", global_nmb_port ) );
 966
 967         if ( !open_sockets( is_daemon, global_nmb_port ) ) {
 968                 kill_async_dns_child();
 969                 return 1;
 970         }
 971
 972         /* Determine all the IP addresses we have. */
 973         load_interfaces();
 974
 975         /* Create an nmbd subnet record for each of the above. */
 976         if( False == create_subnets() ) {
 977                 DEBUG(0,("ERROR: Failed when creating subnet lists. Exiting.\n"));
 978                 kill_async_dns_child();
 979                 exit(1);
 980         }
 981
 982         /* Load in any static local names. */
 983         if (p_lmhosts) {
 984                 set_dyn_LMHOSTSFILE(p_lmhosts);
 985         }
 986         load_lmhosts_file(get_dyn_LMHOSTSFILE());
 987         DEBUG(3,("Loaded hosts file %s\n", get_dyn_LMHOSTSFILE()));
 988
 989         /* If we are acting as a WINS server, initialise data structures. */
 990         if( !initialise_wins() ) {
 991                 DEBUG( 0, ( "nmbd: Failed when initialising WINS server.\n" ) );
 992                 kill_async_dns_child();
 993                 exit(1);
 994         }
 995
 996         /*
 997          * Register nmbd primary workgroup and nmbd names on all
 998          * the broadcast subnets, and on the WINS server (if specified).
 999          * Also initiate the startup of our primary workgroup (start
1000          * elections if we are setup as being able to be a local
1001          * master browser.
1002          */
1003
1004         if( False == register_my_workgroup_and_names() ) {
1005                 DEBUG(0,("ERROR: Failed when creating my my workgroup. Exiting.\n"));
1006                 kill_async_dns_child();
1007                 exit(1);
1008         }
1009
1010         if (!initialize_nmbd_proxy_logon()) {
1011                 DEBUG(0,("ERROR: Failed setup nmbd_proxy_logon.\n"));
1012                 kill_async_dns_child();
1013                 exit(1);
1014         }
1015
1016         TALLOC_FREE(frame);
1017         process();
1018
1019         if (dbf)
1020                 x_fclose(dbf);
1021         kill_async_dns_child();
1022         return(0);
1023 }