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