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