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 #include "includes.h"
  23 #include "system/filesys.h"
  24 #include "popt_common.h"
  25 #include "nmbd/nmbd.h"
  26 #include "serverid.h"
  27 #include "messages.h"
  28
  29 int ClientNMB       = -1;
  30 int ClientDGRAM     = -1;
  31 int global_nmb_port = -1;
  32
  33 extern bool rescan_listen_set;
  34 extern bool global_in_nmbd;
  35
  36 extern bool override_logfile;
  37
  38 /* have we found LanMan clients yet? */
  39 bool found_lm_clients = False;
  40
  41 /* what server type are we currently */
  42
  43 time_t StartupTime = 0;
  44
  45 struct event_context *nmbd_event_context(void)
  46 {
  47         return server_event_context();
  48 }
  49
  50 static struct messaging_context *nmbd_messaging_context(void)
  51 {
  52         struct messaging_context *msg_ctx = server_messaging_context();
  53         if (likely(msg_ctx != NULL)) {
  54                 return msg_ctx;
  55         }
  56         smb_panic("Could not init nmbd's messaging context.\n");
  57         return NULL;
  58 }
  59
  60 /**************************************************************************** **
  61  Handle a SIGTERM in band.
  62  **************************************************************************** */
  63
  64 static void terminate(void)
  65 {
  66         DEBUG(0,("Got SIGTERM: going down...\n"));
  67
  68         /* Write out wins.dat file if samba is a WINS server */
  69         wins_write_database(0,False);
  70
  71         /* Remove all SELF registered names from WINS */
  72         release_wins_names();
  73
  74         /* Announce all server entries as 0 time-to-live, 0 type. */
  75         announce_my_servers_removed();
  76
  77         /* If there was an async dns child - kill it. */
  78         kill_async_dns_child();
  79
  80         gencache_stabilize();
  81         serverid_deregister(procid_self());
  82
  83         pidfile_unlink();
  84
  85         exit(0);
  86 }
  87
  88 static void nmbd_sig_term_handler(struct tevent_context *ev,
  89                                   struct tevent_signal *se,
  90                                   int signum,
  91                                   int count,
  92                                   void *siginfo,
  93                                   void *private_data)
  94 {
  95         terminate();
  96 }
  97
  98 static bool nmbd_setup_sig_term_handler(void)
  99 {
 100         struct tevent_signal *se;
 101
 102         se = tevent_add_signal(nmbd_event_context(),
 103                                nmbd_event_context(),
 104                                SIGTERM, 0,
 105                                nmbd_sig_term_handler,
 106                                NULL);
 107         if (!se) {
 108                 DEBUG(0,("failed to setup SIGTERM handler"));
 109                 return false;
 110         }
 111
 112         return true;
 113 }
 114
 115 static void msg_reload_nmbd_services(struct messaging_context *msg,
 116                                      void *private_data,
 117                                      uint32_t msg_type,
 118                                      struct server_id server_id,
 119                                      DATA_BLOB *data);
 120
 121 static void nmbd_sig_hup_handler(struct tevent_context *ev,
 122                                  struct tevent_signal *se,
 123                                  int signum,
 124                                  int count,
 125                                  void *siginfo,
 126                                  void *private_data)
 127 {
 128         DEBUG(0,("Got SIGHUP dumping debug info.\n"));
 129         msg_reload_nmbd_services(nmbd_messaging_context(),
 130                                  NULL, MSG_SMB_CONF_UPDATED,
 131                                  procid_self(), NULL);
 132 }
 133
 134 static bool nmbd_setup_sig_hup_handler(void)
 135 {
 136         struct tevent_signal *se;
 137
 138         se = tevent_add_signal(nmbd_event_context(),
 139                                nmbd_event_context(),
 140                                SIGHUP, 0,
 141                                nmbd_sig_hup_handler,
 142                                NULL);
 143         if (!se) {
 144                 DEBUG(0,("failed to setup SIGHUP handler"));
 145                 return false;
 146         }
 147
 148         return true;
 149 }
 150
 151 /**************************************************************************** **
 152  Handle a SHUTDOWN message from smbcontrol.
 153  **************************************************************************** */
 154
 155 static void nmbd_terminate(struct messaging_context *msg,
 156                            void *private_data,
 157                            uint32_t msg_type,
 158                            struct server_id server_id,
 159                            DATA_BLOB *data)
 160 {
 161         terminate();
 162 }
 163
 164 /**************************************************************************** **
 165  Expire old names from the namelist and server list.
 166  **************************************************************************** */
 167
 168 static void expire_names_and_servers(time_t t)
 169 {
 170         static time_t lastrun = 0;
 171
 172         if ( !lastrun )
 173                 lastrun = t;
 174         if ( t < (lastrun + 5) )
 175                 return;
 176         lastrun = t;
 177
 178         /*
 179          * Expire any timed out names on all the broadcast
 180          * subnets and those registered with the WINS server.
 181          * (nmbd_namelistdb.c)
 182          */
 183
 184         expire_names(t);
 185
 186         /*
 187          * Go through all the broadcast subnets and for each
 188          * workgroup known on that subnet remove any expired
 189          * server names. If a workgroup has an empty serverlist
 190          * and has itself timed out then remove the workgroup.
 191          * (nmbd_workgroupdb.c)
 192          */
 193
 194         expire_workgroups_and_servers(t);
 195 }
 196
 197 /************************************************************************** **
 198  Reload the list of network interfaces.
 199  Doesn't return until a network interface is up.
 200  ************************************************************************** */
 201
 202 static void reload_interfaces(time_t t)
 203 {
 204         static time_t lastt;
 205         int n;
 206         bool print_waiting_msg = true;
 207         struct subnet_record *subrec;
 208
 209         if (t && ((t - lastt) < NMBD_INTERFACES_RELOAD)) {
 210                 return;
 211         }
 212
 213         lastt = t;
 214
 215         if (!interfaces_changed()) {
 216                 return;
 217         }
 218
 219   try_again:
 220
 221         /* the list of probed interfaces has changed, we may need to add/remove
 222            some subnets */
 223         load_interfaces();
 224
 225         /* find any interfaces that need adding */
 226         for (n=iface_count() - 1; n >= 0; n--) {
 227                 char str[INET6_ADDRSTRLEN];
 228                 const struct interface *iface = get_interface(n);
 229                 struct in_addr ip, nmask;
 230
 231                 if (!iface) {
 232                         DEBUG(2,("reload_interfaces: failed to get interface %d\n", n));
 233                         continue;
 234                 }
 235
 236                 /* Ensure we're only dealing with IPv4 here. */
 237                 if (iface->ip.ss_family != AF_INET) {
 238                         DEBUG(2,("reload_interfaces: "
 239                                 "ignoring non IPv4 interface.\n"));
 240                         continue;
 241                 }
 242
 243                 ip = ((const struct sockaddr_in *)(const void *)&iface->ip)->sin_addr;
 244                 nmask = ((const struct sockaddr_in *)(const void *)
 245                          &iface->netmask)->sin_addr;
 246
 247                 /*
 248                  * We don't want to add a loopback interface, in case
 249                  * someone has added 127.0.0.1 for smbd, nmbd needs to
 250                  * ignore it here. JRA.
 251                  */
 252
 253                 if (is_loopback_addr((const struct sockaddr *)(const void *)&iface->ip)) {
 254                         DEBUG(2,("reload_interfaces: Ignoring loopback "
 255                                 "interface %s\n",
 256                                 print_sockaddr(str, sizeof(str), &iface->ip) ));
 257                         continue;
 258                 }
 259
 260                 for (subrec=subnetlist; subrec; subrec=subrec->next) {
 261                         if (ip_equal_v4(ip, subrec->myip) &&
 262                             ip_equal_v4(nmask, subrec->mask_ip)) {
 263                                 break;
 264                         }
 265                 }
 266
 267                 if (!subrec) {
 268                         /* it wasn't found! add it */
 269                         DEBUG(2,("Found new interface %s\n",
 270                                  print_sockaddr(str,
 271                                          sizeof(str), &iface->ip) ));
 272                         subrec = make_normal_subnet(iface);
 273                         if (subrec)
 274                                 register_my_workgroup_one_subnet(subrec);
 275                 }
 276         }
 277
 278         /* find any interfaces that need deleting */
 279         for (subrec=subnetlist; subrec; subrec=subrec->next) {
 280                 for (n=iface_count() - 1; n >= 0; n--) {
 281                         struct interface *iface = get_interface(n);
 282                         struct in_addr ip, nmask;
 283                         if (!iface) {
 284                                 continue;
 285                         }
 286                         /* Ensure we're only dealing with IPv4 here. */
 287                         if (iface->ip.ss_family != AF_INET) {
 288                                 DEBUG(2,("reload_interfaces: "
 289                                         "ignoring non IPv4 interface.\n"));
 290                                 continue;
 291                         }
 292                         ip = ((struct sockaddr_in *)(void *)
 293                               &iface->ip)->sin_addr;
 294                         nmask = ((struct sockaddr_in *)(void *)
 295                                  &iface->netmask)->sin_addr;
 296                         if (ip_equal_v4(ip, subrec->myip) &&
 297                             ip_equal_v4(nmask, subrec->mask_ip)) {
 298                                 break;
 299                         }
 300                 }
 301                 if (n == -1) {
 302                         /* oops, an interface has disapeared. This is
 303                          tricky, we don't dare actually free the
 304                          interface as it could be being used, so
 305                          instead we just wear the memory leak and
 306                          remove it from the list of interfaces without
 307                          freeing it */
 308                         DEBUG(2,("Deleting dead interface %s\n",
 309                                  inet_ntoa(subrec->myip)));
 310                         close_subnet(subrec);
 311                 }
 312         }
 313
 314         rescan_listen_set = True;
 315
 316         /* We need to wait if there are no subnets... */
 317         if (FIRST_SUBNET == NULL) {
 318                 void (*saved_handler)(int);
 319
 320                 if (print_waiting_msg) {
 321                         DEBUG(0,("reload_interfaces: "
 322                                 "No subnets to listen to. Waiting..\n"));
 323                         print_waiting_msg = false;
 324                 }
 325
 326                 /*
 327                  * Whilst we're waiting for an interface, allow SIGTERM to
 328                  * cause us to exit.
 329                  */
 330                 saved_handler = CatchSignal(SIGTERM, SIG_DFL);
 331
 332                 /* We only count IPv4, non-loopback interfaces here. */
 333                 while (iface_count_v4_nl() == 0) {
 334                         sleep(5);
 335                         load_interfaces();
 336                 }
 337
 338                 CatchSignal(SIGTERM, saved_handler);
 339
 340                 /*
 341                  * We got an interface, go back to blocking term.
 342                  */
 343
 344                 goto try_again;
 345         }
 346 }
 347
 348 /**************************************************************************** **
 349  Reload the services file.
 350  **************************************************************************** */
 351
 352 static bool reload_nmbd_services(bool test)
 353 {
 354         bool ret;
 355
 356         set_remote_machine_name("nmbd", False);
 357
 358         if ( lp_loaded() ) {
 359                 const char *fname = lp_configfile();
 360                 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
 361                         set_dyn_CONFIGFILE(fname);
 362                         test = False;
 363                 }
 364         }
 365
 366         if ( test && !lp_file_list_changed() )
 367                 return(True);
 368
 369         ret = lp_load_global(get_dyn_CONFIGFILE());
 370
 371         /* perhaps the config filename is now set */
 372         if ( !test ) {
 373                 DEBUG( 3, ( "services not loaded\n" ) );
 374                 reload_nmbd_services( True );
 375         }
 376
 377         return(ret);
 378 }
 379
 380 /**************************************************************************** **
 381  * React on 'smbcontrol nmbd reload-config' in the same way as to SIGHUP
 382  **************************************************************************** */
 383
 384 static void msg_reload_nmbd_services(struct messaging_context *msg,
 385                                      void *private_data,
 386                                      uint32_t msg_type,
 387                                      struct server_id server_id,
 388                                      DATA_BLOB *data)
 389 {
 390         write_browse_list( 0, True );
 391         dump_all_namelists();
 392         reload_nmbd_services( True );
 393         reopen_logs();
 394         reload_interfaces(0);
 395 }
 396
 397 static void msg_nmbd_send_packet(struct messaging_context *msg,
 398                                  void *private_data,
 399                                  uint32_t msg_type,
 400                                  struct server_id src,
 401                                  DATA_BLOB *data)
 402 {
 403         struct packet_struct *p = (struct packet_struct *)data->data;
 404         struct subnet_record *subrec;
 405         struct sockaddr_storage ss;
 406         const struct sockaddr_storage *pss;
 407         const struct in_addr *local_ip;
 408
 409         DEBUG(10, ("Received send_packet from %u\n", (unsigned int)procid_to_pid(&src)));
 410
 411         if (data->length != sizeof(struct packet_struct)) {
 412                 DEBUG(2, ("Discarding invalid packet length from %u\n",
 413                           (unsigned int)procid_to_pid(&src)));
 414                 return;
 415         }
 416
 417         if ((p->packet_type != NMB_PACKET) &&
 418             (p->packet_type != DGRAM_PACKET)) {
 419                 DEBUG(2, ("Discarding invalid packet type from %u: %d\n",
 420                           (unsigned int)procid_to_pid(&src), p->packet_type));
 421                 return;
 422         }
 423
 424         in_addr_to_sockaddr_storage(&ss, p->ip);
 425         pss = iface_ip((struct sockaddr *)(void *)&ss);
 426
 427         if (pss == NULL) {
 428                 DEBUG(2, ("Could not find ip for packet from %u\n",
 429                           (unsigned int)procid_to_pid(&src)));
 430                 return;
 431         }
 432
 433         local_ip = &((const struct sockaddr_in *)pss)->sin_addr;
 434         subrec = FIRST_SUBNET;
 435
 436         p->recv_fd = -1;
 437         p->send_fd = (p->packet_type == NMB_PACKET) ?
 438                 subrec->nmb_sock : subrec->dgram_sock;
 439
 440         for (subrec = FIRST_SUBNET; subrec != NULL;
 441              subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
 442                 if (ip_equal_v4(*local_ip, subrec->myip)) {
 443                         p->send_fd = (p->packet_type == NMB_PACKET) ?
 444                                 subrec->nmb_sock : subrec->dgram_sock;
 445                         break;
 446                 }
 447         }
 448
 449         if (p->packet_type == DGRAM_PACKET) {
 450                 p->port = 138;
 451                 p->packet.dgram.header.source_ip.s_addr = local_ip->s_addr;
 452                 p->packet.dgram.header.source_port = 138;
 453         }
 454
 455         send_packet(p);
 456 }
 457
 458 /**************************************************************************** **
 459  The main select loop.
 460  **************************************************************************** */
 461
 462 static void process(void)
 463 {
 464         bool run_election;
 465
 466         while( True ) {
 467                 time_t t = time(NULL);
 468                 TALLOC_CTX *frame = talloc_stackframe();
 469
 470                 /*
 471                  * Check all broadcast subnets to see if
 472                  * we need to run an election on any of them.
 473                  * (nmbd_elections.c)
 474                  */
 475
 476                 run_election = check_elections();
 477
 478                 /*
 479                  * Read incoming UDP packets.
 480                  * (nmbd_packets.c)
 481                  */
 482
 483                 if (listen_for_packets(nmbd_messaging_context(),
 484                                        run_election)) {
 485                         TALLOC_FREE(frame);
 486                         return;
 487                 }
 488
 489                 /*
 490                  * Process all incoming packets
 491                  * read above. This calls the success and
 492                  * failure functions registered when response
 493                  * packets arrrive, and also deals with request
 494                  * packets from other sources.
 495                  * (nmbd_packets.c)
 496                  */
 497
 498                 run_packet_queue();
 499
 500                 /*
 501                  * Run any elections - initiate becoming
 502                  * a local master browser if we have won.
 503                  * (nmbd_elections.c)
 504                  */
 505
 506                 run_elections(t);
 507
 508                 /*
 509                  * Send out any broadcast announcements
 510                  * of our server names. This also announces
 511                  * the workgroup name if we are a local
 512                  * master browser.
 513                  * (nmbd_sendannounce.c)
 514                  */
 515
 516                 announce_my_server_names(t);
 517
 518                 /*
 519                  * Send out any LanMan broadcast announcements
 520                  * of our server names.
 521                  * (nmbd_sendannounce.c)
 522                  */
 523
 524                 announce_my_lm_server_names(t);
 525
 526                 /*
 527                  * If we are a local master browser, periodically
 528                  * announce ourselves to the domain master browser.
 529                  * This also deals with syncronising the domain master
 530                  * browser server lists with ourselves as a local
 531                  * master browser.
 532                  * (nmbd_sendannounce.c)
 533                  */
 534
 535                 announce_myself_to_domain_master_browser(t);
 536
 537                 /*
 538                  * Fullfill any remote announce requests.
 539                  * (nmbd_sendannounce.c)
 540                  */
 541
 542                 announce_remote(t);
 543
 544                 /*
 545                  * Fullfill any remote browse sync announce requests.
 546                  * (nmbd_sendannounce.c)
 547                  */
 548
 549                 browse_sync_remote(t);
 550
 551                 /*
 552                  * Scan the broadcast subnets, and WINS client
 553                  * namelists and refresh any that need refreshing.
 554                  * (nmbd_mynames.c)
 555                  */
 556
 557                 refresh_my_names(t);
 558
 559                 /*
 560                  * Scan the subnet namelists and server lists and
 561                  * expire thos that have timed out.
 562                  * (nmbd.c)
 563                  */
 564
 565                 expire_names_and_servers(t);
 566
 567                 /*
 568                  * Write out a snapshot of our current browse list into
 569                  * the browse.dat file. This is used by smbd to service
 570                  * incoming NetServerEnum calls - used to synchronise
 571                  * browse lists over subnets.
 572                  * (nmbd_serverlistdb.c)
 573                  */
 574
 575                 write_browse_list(t, False);
 576
 577                 /*
 578                  * If we are a domain master browser, we have a list of
 579                  * local master browsers we should synchronise browse
 580                  * lists with (these are added by an incoming local
 581                  * master browser announcement packet). Expire any of
 582                  * these that are no longer current, and pull the server
 583                  * lists from each of these known local master browsers.
 584                  * (nmbd_browsesync.c)
 585                  */
 586
 587                 dmb_expire_and_sync_browser_lists(t);
 588
 589                 /*
 590                  * Check that there is a local master browser for our
 591                  * workgroup for all our broadcast subnets. If one
 592                  * is not found, start an election (which we ourselves
 593                  * may or may not participate in, depending on the
 594                  * setting of the 'local master' parameter.
 595                  * (nmbd_elections.c)
 596                  */
 597
 598                 check_master_browser_exists(t);
 599
 600                 /*
 601                  * If we are configured as a logon server, attempt to
 602                  * register the special NetBIOS names to become such
 603                  * (WORKGROUP<1c> name) on all broadcast subnets and
 604                  * with the WINS server (if used). If we are configured
 605                  * to become a domain master browser, attempt to register
 606                  * the special NetBIOS name (WORKGROUP<1b> name) to
 607                  * become such.
 608                  * (nmbd_become_dmb.c)
 609                  */
 610
 611                 add_domain_names(t);
 612
 613                 /*
 614                  * If we are a WINS server, do any timer dependent
 615                  * processing required.
 616                  * (nmbd_winsserver.c)
 617                  */
 618
 619                 initiate_wins_processing(t);
 620
 621                 /*
 622                  * If we are a domain master browser, attempt to contact the
 623                  * WINS server to get a list of all known WORKGROUPS/DOMAINS.
 624                  * This will only work to a Samba WINS server.
 625                  * (nmbd_browsesync.c)
 626                  */
 627
 628                 if (lp_enhanced_browsing())
 629                         collect_all_workgroup_names_from_wins_server(t);
 630
 631                 /*
 632                  * Go through the response record queue and time out or re-transmit
 633                  * and expired entries.
 634                  * (nmbd_packets.c)
 635                  */
 636
 637                 retransmit_or_expire_response_records(t);
 638
 639                 /*
 640                  * check to see if any remote browse sync child processes have completed
 641                  */
 642
 643                 sync_check_completion();
 644
 645                 /*
 646                  * regularly sync with any other DMBs we know about
 647                  */
 648
 649                 if (lp_enhanced_browsing())
 650                         sync_all_dmbs(t);
 651
 652                 /* check for new network interfaces */
 653
 654                 reload_interfaces(t);
 655
 656                 /* free up temp memory */
 657                 TALLOC_FREE(frame);
 658         }
 659 }
 660
 661 /**************************************************************************** **
 662  Open the socket communication.
 663  **************************************************************************** */
 664
 665 static bool open_sockets(bool isdaemon, int port)
 666 {
 667         struct sockaddr_storage ss;
 668         const char *sock_addr = lp_socket_address();
 669
 670         /*
 671          * The sockets opened here will be used to receive broadcast
 672          * packets *only*. Interface specific sockets are opened in
 673          * make_subnet() in namedbsubnet.c. Thus we bind to the
 674          * address "0.0.0.0". The parameter 'socket address' is
 675          * now deprecated.
 676          */
 677
 678         if (!interpret_string_addr(&ss, sock_addr,
 679                                 AI_NUMERICHOST|AI_PASSIVE)) {
 680                 DEBUG(0,("open_sockets: unable to get socket address "
 681                         "from string %s", sock_addr));
 682                 return false;
 683         }
 684         if (ss.ss_family != AF_INET) {
 685                 DEBUG(0,("open_sockets: unable to use IPv6 socket"
 686                         "%s in nmbd\n",
 687                         sock_addr));
 688                 return false;
 689         }
 690
 691         if (isdaemon) {
 692                 ClientNMB = open_socket_in(SOCK_DGRAM, port,
 693                                            0, &ss,
 694                                            true);
 695         } else {
 696                 ClientNMB = 0;
 697         }
 698
 699         if (ClientNMB == -1) {
 700                 return false;
 701         }
 702
 703         ClientDGRAM = open_socket_in(SOCK_DGRAM, DGRAM_PORT,
 704                                            3, &ss,
 705                                            true);
 706
 707         if (ClientDGRAM == -1) {
 708                 if (ClientNMB != 0) {
 709                         close(ClientNMB);
 710                 }
 711                 return false;
 712         }
 713
 714         /* we are never interested in SIGPIPE */
 715         BlockSignals(True,SIGPIPE);
 716
 717         set_socket_options( ClientNMB,   "SO_BROADCAST" );
 718         set_socket_options( ClientDGRAM, "SO_BROADCAST" );
 719
 720         /* Ensure we're non-blocking. */
 721         set_blocking( ClientNMB, False);
 722         set_blocking( ClientDGRAM, False);
 723
 724         DEBUG( 3, ( "open_sockets: Broadcast sockets opened.\n" ) );
 725         return( True );
 726 }
 727
 728 /**************************************************************************** **
 729  main program
 730  **************************************************************************** */
 731
 732  int main(int argc, const char *argv[])
 733 {
 734         static bool is_daemon;
 735         static bool opt_interactive;
 736         static bool Fork = true;
 737         static bool no_process_group;
 738         static bool log_stdout;
 739         poptContext pc;
 740         char *p_lmhosts = NULL;
 741         int opt;
 742         enum {
 743                 OPT_DAEMON = 1000,
 744                 OPT_INTERACTIVE,
 745                 OPT_FORK,
 746                 OPT_NO_PROCESS_GROUP,
 747                 OPT_LOG_STDOUT
 748         };
 749         struct poptOption long_options[] = {
 750         POPT_AUTOHELP
 751         {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon(default)" },
 752         {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)" },
 753         {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools & etc)" },
 754         {"no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
 755         {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
 756         {"hosts", 'H', POPT_ARG_STRING, &p_lmhosts, 0, "Load a netbios hosts file"},
 757         {"port", 'p', POPT_ARG_INT, &global_nmb_port, 0, "Listen on the specified port" },
 758         POPT_COMMON_SAMBA
 759         { NULL }
 760         };
 761         TALLOC_CTX *frame;
 762         NTSTATUS status;
 763
 764         /*
 765          * Do this before any other talloc operation
 766          */
 767         talloc_enable_null_tracking();
 768         frame = talloc_stackframe();
 769
 770         setup_logging(argv[0], DEBUG_DEFAULT_STDOUT);
 771
 772         load_case_tables();
 773
 774         global_nmb_port = NMB_PORT;
 775
 776         pc = poptGetContext("nmbd", argc, argv, long_options, 0);
 777         while ((opt = poptGetNextOpt(pc)) != -1) {
 778                 switch (opt) {
 779                 case OPT_DAEMON:
 780                         is_daemon = true;
 781                         break;
 782                 case OPT_INTERACTIVE:
 783                         opt_interactive = true;
 784                         break;
 785                 case OPT_FORK:
 786                         Fork = false;
 787                         break;
 788                 case OPT_NO_PROCESS_GROUP:
 789                         no_process_group = true;
 790                         break;
 791                 case OPT_LOG_STDOUT:
 792                         log_stdout = true;
 793                         break;
 794                 default:
 795                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
 796                                   poptBadOption(pc, 0), poptStrerror(opt));
 797                         poptPrintUsage(pc, stderr, 0);
 798                         exit(1);
 799                 }
 800         };
 801         poptFreeContext(pc);
 802
 803         global_in_nmbd = true;
 804
 805         StartupTime = time(NULL);
 806
 807         sys_srandom(time(NULL) ^ sys_getpid());
 808
 809         if (!override_logfile) {
 810                 char *lfile = NULL;
 811                 if (asprintf(&lfile, "%s/log.nmbd", get_dyn_LOGFILEBASE()) < 0) {
 812                         exit(1);
 813                 }
 814                 lp_set_logfile(lfile);
 815                 SAFE_FREE(lfile);
 816         }
 817
 818         fault_setup();
 819         dump_core_setup("nmbd", lp_logfile());
 820
 821         /* POSIX demands that signals are inherited. If the invoking process has
 822          * these signals masked, we will have problems, as we won't receive them. */
 823         BlockSignals(False, SIGHUP);
 824         BlockSignals(False, SIGUSR1);
 825         BlockSignals(False, SIGTERM);
 826
 827 #if defined(SIGFPE)
 828         /* we are never interested in SIGFPE */
 829         BlockSignals(True,SIGFPE);
 830 #endif
 831
 832         /* We no longer use USR2... */
 833 #if defined(SIGUSR2)
 834         BlockSignals(True, SIGUSR2);
 835 #endif
 836
 837         if ( opt_interactive ) {
 838                 Fork = False;
 839                 log_stdout = True;
 840         }
 841
 842         if ( log_stdout && Fork ) {
 843                 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
 844                 exit(1);
 845         }
 846
 847         if (log_stdout) {
 848                 setup_logging(argv[0], DEBUG_STDOUT);
 849         } else {
 850                 setup_logging( argv[0], DEBUG_FILE);
 851         }
 852
 853         reopen_logs();
 854
 855         DEBUG(0,("nmbd version %s started.\n", samba_version_string()));
 856         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
 857
 858         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
 859                 DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
 860                 exit(1);
 861         }
 862
 863         if (nmbd_messaging_context() == NULL) {
 864                 return 1;
 865         }
 866
 867         if ( !reload_nmbd_services(False) )
 868                 return(-1);
 869
 870         if(!init_names())
 871                 return -1;
 872
 873         reload_nmbd_services( True );
 874
 875         if (strequal(lp_workgroup(),"*")) {
 876                 DEBUG(0,("ERROR: a workgroup name of * is no longer supported\n"));
 877                 exit(1);
 878         }
 879
 880         set_samba_nb_type();
 881
 882         if (!is_daemon && !is_a_socket(0)) {
 883                 DEBUG(0,("standard input is not a socket, assuming -D option\n"));
 884                 is_daemon = True;
 885         }
 886
 887         if (is_daemon && !opt_interactive) {
 888                 DEBUG( 2, ( "Becoming a daemon.\n" ) );
 889                 become_daemon(Fork, no_process_group, log_stdout);
 890         }
 891
 892 #if HAVE_SETPGID
 893         /*
 894          * If we're interactive we want to set our own process group for
 895          * signal management.
 896          */
 897         if (opt_interactive && !no_process_group)
 898                 setpgid( (pid_t)0, (pid_t)0 );
 899 #endif
 900
 901         if (nmbd_messaging_context() == NULL) {
 902                 return 1;
 903         }
 904
 905 #ifndef SYNC_DNS
 906         /* Setup the async dns. We do it here so it doesn't have all the other
 907                 stuff initialised and thus chewing memory and sockets */
 908         if(lp_we_are_a_wins_server() && lp_dns_proxy()) {
 909                 start_async_dns(nmbd_messaging_context());
 910         }
 911 #endif
 912
 913         if (!directory_exist(lp_lockdir())) {
 914                 mkdir(lp_lockdir(), 0755);
 915         }
 916
 917         pidfile_create("nmbd");
 918
 919         status = reinit_after_fork(nmbd_messaging_context(),
 920                                    nmbd_event_context(),
 921                                    false);
 922
 923         if (!NT_STATUS_IS_OK(status)) {
 924                 DEBUG(0,("reinit_after_fork() failed\n"));
 925                 exit(1);
 926         }
 927
 928         if (!nmbd_setup_sig_term_handler())
 929                 exit(1);
 930         if (!nmbd_setup_sig_hup_handler())
 931                 exit(1);
 932
 933         /* get broadcast messages */
 934
 935         if (!serverid_register(procid_self(),
 936                                 FLAG_MSG_GENERAL |
 937                                 FLAG_MSG_NMBD |
 938                                 FLAG_MSG_DBWRAP)) {
 939                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
 940                 exit(1);
 941         }
 942
 943         messaging_register(nmbd_messaging_context(), NULL,
 944                            MSG_FORCE_ELECTION, nmbd_message_election);
 945 #if 0
 946         /* Until winsrepl is done. */
 947         messaging_register(nmbd_messaging_context(), NULL,
 948                            MSG_WINS_NEW_ENTRY, nmbd_wins_new_entry);
 949 #endif
 950         messaging_register(nmbd_messaging_context(), NULL,
 951                            MSG_SHUTDOWN, nmbd_terminate);
 952         messaging_register(nmbd_messaging_context(), NULL,
 953                            MSG_SMB_CONF_UPDATED, msg_reload_nmbd_services);
 954         messaging_register(nmbd_messaging_context(), NULL,
 955                            MSG_SEND_PACKET, msg_nmbd_send_packet);
 956
 957         TimeInit();
 958
 959         DEBUG( 3, ( "Opening sockets %d\n", global_nmb_port ) );
 960
 961         if ( !open_sockets( is_daemon, global_nmb_port ) ) {
 962                 kill_async_dns_child();
 963                 return 1;
 964         }
 965
 966         /* Determine all the IP addresses we have. */
 967         load_interfaces();
 968
 969         /* Create an nmbd subnet record for each of the above. */
 970         if( False == create_subnets() ) {
 971                 DEBUG(0,("ERROR: Failed when creating subnet lists. Exiting.\n"));
 972                 kill_async_dns_child();
 973                 exit(1);
 974         }
 975
 976         /* Load in any static local names. */
 977         if (p_lmhosts) {
 978                 set_dyn_LMHOSTSFILE(p_lmhosts);
 979         }
 980         load_lmhosts_file(get_dyn_LMHOSTSFILE());
 981         DEBUG(3,("Loaded hosts file %s\n", get_dyn_LMHOSTSFILE()));
 982
 983         /* If we are acting as a WINS server, initialise data structures. */
 984         if( !initialise_wins() ) {
 985                 DEBUG( 0, ( "nmbd: Failed when initialising WINS server.\n" ) );
 986                 kill_async_dns_child();
 987                 exit(1);
 988         }
 989
 990         /*
 991          * Register nmbd primary workgroup and nmbd names on all
 992          * the broadcast subnets, and on the WINS server (if specified).
 993          * Also initiate the startup of our primary workgroup (start
 994          * elections if we are setup as being able to be a local
 995          * master browser.
 996          */
 997
 998         if( False == register_my_workgroup_and_names() ) {
 999                 DEBUG(0,("ERROR: Failed when creating my my workgroup. Exiting.\n"));
1000                 kill_async_dns_child();
1001                 exit(1);
1002         }
1003
1004         if (!initialize_nmbd_proxy_logon()) {
1005                 DEBUG(0,("ERROR: Failed setup nmbd_proxy_logon.\n"));
1006                 kill_async_dns_child();
1007                 exit(1);
1008         }
1009
1010         if (!nmbd_init_packet_server()) {
1011                 kill_async_dns_child();
1012                 exit(1);
1013         }
1014
1015         TALLOC_FREE(frame);
1016         process();
1017
1018         kill_async_dns_child();
1019         return(0);
1020 }