source: vendor/3.5.0/source3/nmbd/nmbd.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 24.6 KB
Line 
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
25int ClientNMB = -1;
26int ClientDGRAM = -1;
27int global_nmb_port = -1;
28
29extern bool rescan_listen_set;
30extern bool global_in_nmbd;
31
32extern bool override_logfile;
33
34/* have we found LanMan clients yet? */
35bool found_lm_clients = False;
36
37/* what server type are we currently */
38
39time_t StartupTime = 0;
40
41struct 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
51struct messaging_context *nmbd_messaging_context(void)
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
69static 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
87 pidfile_unlink();
88
89 exit(0);
90}
91
92static void nmbd_sig_term_handler(struct tevent_context *ev,
93 struct tevent_signal *se,
94 int signum,
95 int count,
96 void *siginfo,
97 void *private_data)
98{
99 terminate();
100}
101
102static bool nmbd_setup_sig_term_handler(void)
103{
104 struct tevent_signal *se;
105
106 se = tevent_add_signal(nmbd_event_context(),
107 nmbd_event_context(),
108 SIGTERM, 0,
109 nmbd_sig_term_handler,
110 NULL);
111 if (!se) {
112 DEBUG(0,("failed to setup SIGTERM handler"));
113 return false;
114 }
115
116 return true;
117}
118
119static void msg_reload_nmbd_services(struct messaging_context *msg,
120 void *private_data,
121 uint32_t msg_type,
122 struct server_id server_id,
123 DATA_BLOB *data);
124
125static void nmbd_sig_hup_handler(struct tevent_context *ev,
126 struct tevent_signal *se,
127 int signum,
128 int count,
129 void *siginfo,
130 void *private_data)
131{
132 DEBUG(0,("Got SIGHUP dumping debug info.\n"));
133 msg_reload_nmbd_services(nmbd_messaging_context(),
134 NULL, MSG_SMB_CONF_UPDATED,
135 procid_self(), NULL);
136}
137
138static bool nmbd_setup_sig_hup_handler(void)
139{
140 struct tevent_signal *se;
141
142 se = tevent_add_signal(nmbd_event_context(),
143 nmbd_event_context(),
144 SIGHUP, 0,
145 nmbd_sig_hup_handler,
146 NULL);
147 if (!se) {
148 DEBUG(0,("failed to setup SIGHUP handler"));
149 return false;
150 }
151
152 return true;
153}
154
155/**************************************************************************** **
156 Handle a SHUTDOWN message from smbcontrol.
157 **************************************************************************** */
158
159static void nmbd_terminate(struct messaging_context *msg,
160 void *private_data,
161 uint32_t msg_type,
162 struct server_id server_id,
163 DATA_BLOB *data)
164{
165 terminate();
166}
167
168/**************************************************************************** **
169 Possibly continue after a fault.
170 **************************************************************************** */
171
172static void fault_continue(void)
173{
174 dump_core();
175}
176
177/**************************************************************************** **
178 Expire old names from the namelist and server list.
179 **************************************************************************** */
180
181static void expire_names_and_servers(time_t t)
182{
183 static time_t lastrun = 0;
184
185 if ( !lastrun )
186 lastrun = t;
187 if ( t < (lastrun + 5) )
188 return;
189 lastrun = t;
190
191 /*
192 * Expire any timed out names on all the broadcast
193 * subnets and those registered with the WINS server.
194 * (nmbd_namelistdb.c)
195 */
196
197 expire_names(t);
198
199 /*
200 * Go through all the broadcast subnets and for each
201 * workgroup known on that subnet remove any expired
202 * server names. If a workgroup has an empty serverlist
203 * and has itself timed out then remove the workgroup.
204 * (nmbd_workgroupdb.c)
205 */
206
207 expire_workgroups_and_servers(t);
208}
209
210/************************************************************************** **
211 Reload the list of network interfaces.
212 Doesn't return until a network interface is up.
213 ************************************************************************** */
214
215static void reload_interfaces(time_t t)
216{
217 static time_t lastt;
218 int n;
219 bool print_waiting_msg = true;
220 struct subnet_record *subrec;
221
222 if (t && ((t - lastt) < NMBD_INTERFACES_RELOAD)) {
223 return;
224 }
225
226 lastt = t;
227
228 if (!interfaces_changed()) {
229 return;
230 }
231
232 try_again:
233
234 /* the list of probed interfaces has changed, we may need to add/remove
235 some subnets */
236 load_interfaces();
237
238 /* find any interfaces that need adding */
239 for (n=iface_count() - 1; n >= 0; n--) {
240 char str[INET6_ADDRSTRLEN];
241 const struct interface *iface = get_interface(n);
242 struct in_addr ip, nmask;
243
244 if (!iface) {
245 DEBUG(2,("reload_interfaces: failed to get interface %d\n", n));
246 continue;
247 }
248
249 /* Ensure we're only dealing with IPv4 here. */
250 if (iface->ip.ss_family != AF_INET) {
251 DEBUG(2,("reload_interfaces: "
252 "ignoring non IPv4 interface.\n"));
253 continue;
254 }
255
256 ip = ((struct sockaddr_in *)&iface->ip)->sin_addr;
257 nmask = ((struct sockaddr_in *)&iface->netmask)->sin_addr;
258
259 /*
260 * We don't want to add a loopback interface, in case
261 * someone has added 127.0.0.1 for smbd, nmbd needs to
262 * ignore it here. JRA.
263 */
264
265 if (is_loopback_addr((struct sockaddr *)&iface->ip)) {
266 DEBUG(2,("reload_interfaces: Ignoring loopback "
267 "interface %s\n",
268 print_sockaddr(str, sizeof(str), &iface->ip) ));
269 continue;
270 }
271
272 for (subrec=subnetlist; subrec; subrec=subrec->next) {
273 if (ip_equal_v4(ip, subrec->myip) &&
274 ip_equal_v4(nmask, subrec->mask_ip)) {
275 break;
276 }
277 }
278
279 if (!subrec) {
280 /* it wasn't found! add it */
281 DEBUG(2,("Found new interface %s\n",
282 print_sockaddr(str,
283 sizeof(str), &iface->ip) ));
284 subrec = make_normal_subnet(iface);
285 if (subrec)
286 register_my_workgroup_one_subnet(subrec);
287 }
288 }
289
290 /* find any interfaces that need deleting */
291 for (subrec=subnetlist; subrec; subrec=subrec->next) {
292 for (n=iface_count() - 1; n >= 0; n--) {
293 struct interface *iface = get_interface(n);
294 struct in_addr ip, nmask;
295 if (!iface) {
296 continue;
297 }
298 /* Ensure we're only dealing with IPv4 here. */
299 if (iface->ip.ss_family != AF_INET) {
300 DEBUG(2,("reload_interfaces: "
301 "ignoring non IPv4 interface.\n"));
302 continue;
303 }
304 ip = ((struct sockaddr_in *)&iface->ip)->sin_addr;
305 nmask = ((struct sockaddr_in *)&iface->netmask)->sin_addr;
306 if (ip_equal_v4(ip, subrec->myip) &&
307 ip_equal_v4(nmask, subrec->mask_ip)) {
308 break;
309 }
310 }
311 if (n == -1) {
312 /* oops, an interface has disapeared. This is
313 tricky, we don't dare actually free the
314 interface as it could be being used, so
315 instead we just wear the memory leak and
316 remove it from the list of interfaces without
317 freeing it */
318 DEBUG(2,("Deleting dead interface %s\n",
319 inet_ntoa(subrec->myip)));
320 close_subnet(subrec);
321 }
322 }
323
324 rescan_listen_set = True;
325
326 /* We need to wait if there are no subnets... */
327 if (FIRST_SUBNET == NULL) {
328 void (*saved_handler)(int);
329
330 if (print_waiting_msg) {
331 DEBUG(0,("reload_interfaces: "
332 "No subnets to listen to. Waiting..\n"));
333 print_waiting_msg = false;
334 }
335
336 /*
337 * Whilst we're waiting for an interface, allow SIGTERM to
338 * cause us to exit.
339 */
340 saved_handler = CatchSignal( SIGTERM, SIGNAL_CAST SIG_DFL );
341
342 /* We only count IPv4, non-loopback interfaces here. */
343 while (iface_count_v4_nl() == 0) {
344 sleep(5);
345 load_interfaces();
346 }
347
348 CatchSignal( SIGTERM, SIGNAL_CAST saved_handler );
349
350 /*
351 * We got an interface, go back to blocking term.
352 */
353
354 goto try_again;
355 }
356}
357
358/**************************************************************************** **
359 Reload the services file.
360 **************************************************************************** */
361
362static bool reload_nmbd_services(bool test)
363{
364 bool ret;
365
366 set_remote_machine_name("nmbd", False);
367
368 if ( lp_loaded() ) {
369 const char *fname = lp_configfile();
370 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
371 set_dyn_CONFIGFILE(fname);
372 test = False;
373 }
374 }
375
376 if ( test && !lp_file_list_changed() )
377 return(True);
378
379 ret = lp_load(get_dyn_CONFIGFILE(), True , False, False, True);
380
381 /* perhaps the config filename is now set */
382 if ( !test ) {
383 DEBUG( 3, ( "services not loaded\n" ) );
384 reload_nmbd_services( True );
385 }
386
387 return(ret);
388}
389
390/**************************************************************************** **
391 * React on 'smbcontrol nmbd reload-config' in the same way as to SIGHUP
392 **************************************************************************** */
393
394static void msg_reload_nmbd_services(struct messaging_context *msg,
395 void *private_data,
396 uint32_t msg_type,
397 struct server_id server_id,
398 DATA_BLOB *data)
399{
400 write_browse_list( 0, True );
401 dump_all_namelists();
402 reload_nmbd_services( True );
403 reopen_logs();
404 reload_interfaces(0);
405}
406
407static void msg_nmbd_send_packet(struct messaging_context *msg,
408 void *private_data,
409 uint32_t msg_type,
410 struct server_id src,
411 DATA_BLOB *data)
412{
413 struct packet_struct *p = (struct packet_struct *)data->data;
414 struct subnet_record *subrec;
415 struct sockaddr_storage ss;
416 const struct sockaddr_storage *pss;
417 const struct in_addr *local_ip;
418
419 DEBUG(10, ("Received send_packet from %u\n", (unsigned int)procid_to_pid(&src)));
420
421 if (data->length != sizeof(struct packet_struct)) {
422 DEBUG(2, ("Discarding invalid packet length from %u\n",
423 (unsigned int)procid_to_pid(&src)));
424 return;
425 }
426
427 if ((p->packet_type != NMB_PACKET) &&
428 (p->packet_type != DGRAM_PACKET)) {
429 DEBUG(2, ("Discarding invalid packet type from %u: %d\n",
430 (unsigned int)procid_to_pid(&src), p->packet_type));
431 return;
432 }
433
434 in_addr_to_sockaddr_storage(&ss, p->ip);
435 pss = iface_ip((struct sockaddr *)&ss);
436
437 if (pss == NULL) {
438 DEBUG(2, ("Could not find ip for packet from %u\n",
439 (unsigned int)procid_to_pid(&src)));
440 return;
441 }
442
443 local_ip = &((const struct sockaddr_in *)pss)->sin_addr;
444 subrec = FIRST_SUBNET;
445
446 p->recv_fd = -1;
447 p->send_fd = (p->packet_type == NMB_PACKET) ?
448 subrec->nmb_sock : subrec->dgram_sock;
449
450 for (subrec = FIRST_SUBNET; subrec != NULL;
451 subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
452 if (ip_equal_v4(*local_ip, subrec->myip)) {
453 p->send_fd = (p->packet_type == NMB_PACKET) ?
454 subrec->nmb_sock : subrec->dgram_sock;
455 break;
456 }
457 }
458
459 if (p->packet_type == DGRAM_PACKET) {
460 p->port = 138;
461 p->packet.dgram.header.source_ip.s_addr = local_ip->s_addr;
462 p->packet.dgram.header.source_port = 138;
463 }
464
465 send_packet(p);
466}
467
468/**************************************************************************** **
469 The main select loop.
470 **************************************************************************** */
471
472static void process(void)
473{
474 bool run_election;
475
476 while( True ) {
477 time_t t = time(NULL);
478 TALLOC_CTX *frame = talloc_stackframe();
479
480 /*
481 * Check all broadcast subnets to see if
482 * we need to run an election on any of them.
483 * (nmbd_elections.c)
484 */
485
486 run_election = check_elections();
487
488 /*
489 * Read incoming UDP packets.
490 * (nmbd_packets.c)
491 */
492
493 if(listen_for_packets(run_election)) {
494 TALLOC_FREE(frame);
495 return;
496 }
497
498 /*
499 * Process all incoming packets
500 * read above. This calls the success and
501 * failure functions registered when response
502 * packets arrrive, and also deals with request
503 * packets from other sources.
504 * (nmbd_packets.c)
505 */
506
507 run_packet_queue();
508
509 /*
510 * Run any elections - initiate becoming
511 * a local master browser if we have won.
512 * (nmbd_elections.c)
513 */
514
515 run_elections(t);
516
517 /*
518 * Send out any broadcast announcements
519 * of our server names. This also announces
520 * the workgroup name if we are a local
521 * master browser.
522 * (nmbd_sendannounce.c)
523 */
524
525 announce_my_server_names(t);
526
527 /*
528 * Send out any LanMan broadcast announcements
529 * of our server names.
530 * (nmbd_sendannounce.c)
531 */
532
533 announce_my_lm_server_names(t);
534
535 /*
536 * If we are a local master browser, periodically
537 * announce ourselves to the domain master browser.
538 * This also deals with syncronising the domain master
539 * browser server lists with ourselves as a local
540 * master browser.
541 * (nmbd_sendannounce.c)
542 */
543
544 announce_myself_to_domain_master_browser(t);
545
546 /*
547 * Fullfill any remote announce requests.
548 * (nmbd_sendannounce.c)
549 */
550
551 announce_remote(t);
552
553 /*
554 * Fullfill any remote browse sync announce requests.
555 * (nmbd_sendannounce.c)
556 */
557
558 browse_sync_remote(t);
559
560 /*
561 * Scan the broadcast subnets, and WINS client
562 * namelists and refresh any that need refreshing.
563 * (nmbd_mynames.c)
564 */
565
566 refresh_my_names(t);
567
568 /*
569 * Scan the subnet namelists and server lists and
570 * expire thos that have timed out.
571 * (nmbd.c)
572 */
573
574 expire_names_and_servers(t);
575
576 /*
577 * Write out a snapshot of our current browse list into
578 * the browse.dat file. This is used by smbd to service
579 * incoming NetServerEnum calls - used to synchronise
580 * browse lists over subnets.
581 * (nmbd_serverlistdb.c)
582 */
583
584 write_browse_list(t, False);
585
586 /*
587 * If we are a domain master browser, we have a list of
588 * local master browsers we should synchronise browse
589 * lists with (these are added by an incoming local
590 * master browser announcement packet). Expire any of
591 * these that are no longer current, and pull the server
592 * lists from each of these known local master browsers.
593 * (nmbd_browsesync.c)
594 */
595
596 dmb_expire_and_sync_browser_lists(t);
597
598 /*
599 * Check that there is a local master browser for our
600 * workgroup for all our broadcast subnets. If one
601 * is not found, start an election (which we ourselves
602 * may or may not participate in, depending on the
603 * setting of the 'local master' parameter.
604 * (nmbd_elections.c)
605 */
606
607 check_master_browser_exists(t);
608
609 /*
610 * If we are configured as a logon server, attempt to
611 * register the special NetBIOS names to become such
612 * (WORKGROUP<1c> name) on all broadcast subnets and
613 * with the WINS server (if used). If we are configured
614 * to become a domain master browser, attempt to register
615 * the special NetBIOS name (WORKGROUP<1b> name) to
616 * become such.
617 * (nmbd_become_dmb.c)
618 */
619
620 add_domain_names(t);
621
622 /*
623 * If we are a WINS server, do any timer dependent
624 * processing required.
625 * (nmbd_winsserver.c)
626 */
627
628 initiate_wins_processing(t);
629
630 /*
631 * If we are a domain master browser, attempt to contact the
632 * WINS server to get a list of all known WORKGROUPS/DOMAINS.
633 * This will only work to a Samba WINS server.
634 * (nmbd_browsesync.c)
635 */
636
637 if (lp_enhanced_browsing())
638 collect_all_workgroup_names_from_wins_server(t);
639
640 /*
641 * Go through the response record queue and time out or re-transmit
642 * and expired entries.
643 * (nmbd_packets.c)
644 */
645
646 retransmit_or_expire_response_records(t);
647
648 /*
649 * check to see if any remote browse sync child processes have completed
650 */
651
652 sync_check_completion();
653
654 /*
655 * regularly sync with any other DMBs we know about
656 */
657
658 if (lp_enhanced_browsing())
659 sync_all_dmbs(t);
660
661 /*
662 * clear the unexpected packet queue
663 */
664
665 clear_unexpected(t);
666
667 /* check for new network interfaces */
668
669 reload_interfaces(t);
670
671 /* free up temp memory */
672 TALLOC_FREE(frame);
673 }
674}
675
676/**************************************************************************** **
677 Open the socket communication.
678 **************************************************************************** */
679
680static bool open_sockets(bool isdaemon, int port)
681{
682 struct sockaddr_storage ss;
683 const char *sock_addr = lp_socket_address();
684
685 /*
686 * The sockets opened here will be used to receive broadcast
687 * packets *only*. Interface specific sockets are opened in
688 * make_subnet() in namedbsubnet.c. Thus we bind to the
689 * address "0.0.0.0". The parameter 'socket address' is
690 * now deprecated.
691 */
692
693 if (!interpret_string_addr(&ss, sock_addr,
694 AI_NUMERICHOST|AI_PASSIVE)) {
695 DEBUG(0,("open_sockets: unable to get socket address "
696 "from string %s", sock_addr));
697 return false;
698 }
699 if (ss.ss_family != AF_INET) {
700 DEBUG(0,("open_sockets: unable to use IPv6 socket"
701 "%s in nmbd\n",
702 sock_addr));
703 return false;
704 }
705
706 if (isdaemon) {
707 ClientNMB = open_socket_in(SOCK_DGRAM, port,
708 0, &ss,
709 true);
710 } else {
711 ClientNMB = 0;
712 }
713
714 if (ClientNMB == -1) {
715 return false;
716 }
717
718 ClientDGRAM = open_socket_in(SOCK_DGRAM, DGRAM_PORT,
719 3, &ss,
720 true);
721
722 if (ClientDGRAM == -1) {
723 if (ClientNMB != 0) {
724 close(ClientNMB);
725 }
726 return false;
727 }
728
729 /* we are never interested in SIGPIPE */
730 BlockSignals(True,SIGPIPE);
731
732 set_socket_options( ClientNMB, "SO_BROADCAST" );
733 set_socket_options( ClientDGRAM, "SO_BROADCAST" );
734
735 /* Ensure we're non-blocking. */
736 set_blocking( ClientNMB, False);
737 set_blocking( ClientDGRAM, False);
738
739 DEBUG( 3, ( "open_sockets: Broadcast sockets opened.\n" ) );
740 return( True );
741}
742
743/**************************************************************************** **
744 main program
745 **************************************************************************** */
746
747 int main(int argc, const char *argv[])
748{
749 static bool is_daemon;
750 static bool opt_interactive;
751 static bool Fork = true;
752 static bool no_process_group;
753 static bool log_stdout;
754 poptContext pc;
755 char *p_lmhosts = NULL;
756 int opt;
757 enum {
758 OPT_DAEMON = 1000,
759 OPT_INTERACTIVE,
760 OPT_FORK,
761 OPT_NO_PROCESS_GROUP,
762 OPT_LOG_STDOUT
763 };
764 struct poptOption long_options[] = {
765 POPT_AUTOHELP
766 {"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon(default)" },
767 {"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE, "Run interactive (not a daemon)" },
768 {"foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Run daemon in foreground (for daemontools & etc)" },
769 {"no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
770 {"log-stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
771 {"hosts", 'H', POPT_ARG_STRING, &p_lmhosts, 'H', "Load a netbios hosts file"},
772 {"port", 'p', POPT_ARG_INT, &global_nmb_port, NMB_PORT, "Listen on the specified port" },
773 POPT_COMMON_SAMBA
774 { NULL }
775 };
776 TALLOC_CTX *frame = talloc_stackframe(); /* Setup tos. */
777
778 load_case_tables();
779
780 global_nmb_port = NMB_PORT;
781
782 pc = poptGetContext("nmbd", argc, argv, long_options, 0);
783 while ((opt = poptGetNextOpt(pc)) != -1) {
784 switch (opt) {
785 case OPT_DAEMON:
786 is_daemon = true;
787 break;
788 case OPT_INTERACTIVE:
789 opt_interactive = true;
790 break;
791 case OPT_FORK:
792 Fork = false;
793 break;
794 case OPT_NO_PROCESS_GROUP:
795 no_process_group = true;
796 break;
797 case OPT_LOG_STDOUT:
798 log_stdout = true;
799 break;
800 default:
801 d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
802 poptBadOption(pc, 0), poptStrerror(opt));
803 poptPrintUsage(pc, stderr, 0);
804 exit(1);
805 }
806 };
807 poptFreeContext(pc);
808
809 global_in_nmbd = true;
810
811 StartupTime = time(NULL);
812
813 sys_srandom(time(NULL) ^ sys_getpid());
814
815 if (!override_logfile) {
816 char *lfile = NULL;
817 if (asprintf(&lfile, "%s/log.nmbd", get_dyn_LOGFILEBASE()) < 0) {
818 exit(1);
819 }
820 lp_set_logfile(lfile);
821 SAFE_FREE(lfile);
822 }
823
824 fault_setup((void (*)(void *))fault_continue );
825 dump_core_setup("nmbd");
826
827 /* POSIX demands that signals are inherited. If the invoking process has
828 * these signals masked, we will have problems, as we won't receive them. */
829 BlockSignals(False, SIGHUP);
830 BlockSignals(False, SIGUSR1);
831 BlockSignals(False, SIGTERM);
832
833#if defined(SIGFPE)
834 /* we are never interested in SIGFPE */
835 BlockSignals(True,SIGFPE);
836#endif
837
838 /* We no longer use USR2... */
839#if defined(SIGUSR2)
840 BlockSignals(True, SIGUSR2);
841#endif
842
843 if ( opt_interactive ) {
844 Fork = False;
845 log_stdout = True;
846 }
847
848 if ( log_stdout && Fork ) {
849 DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
850 exit(1);
851 }
852
853 setup_logging( argv[0], log_stdout );
854
855 reopen_logs();
856
857 DEBUG(0,("nmbd version %s started.\n", samba_version_string()));
858 DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
859
860 if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
861 DEBUG(0, ("error opening config file\n"));
862 exit(1);
863 }
864
865 if (nmbd_messaging_context() == NULL) {
866 return 1;
867 }
868
869 if ( !reload_nmbd_services(False) )
870 return(-1);
871
872 if(!init_names())
873 return -1;
874
875 reload_nmbd_services( True );
876
877 if (strequal(lp_workgroup(),"*")) {
878 DEBUG(0,("ERROR: a workgroup name of * is no longer supported\n"));
879 exit(1);
880 }
881
882 set_samba_nb_type();
883
884 if (!is_daemon && !is_a_socket(0)) {
885 DEBUG(0,("standard input is not a socket, assuming -D option\n"));
886 is_daemon = True;
887 }
888
889 if (is_daemon && !opt_interactive) {
890 DEBUG( 2, ( "Becoming a daemon.\n" ) );
891 become_daemon(Fork, no_process_group);
892 }
893
894#if HAVE_SETPGID
895 /*
896 * If we're interactive we want to set our own process group for
897 * signal management.
898 */
899 if (opt_interactive && !no_process_group)
900 setpgid( (pid_t)0, (pid_t)0 );
901#endif
902
903 if (nmbd_messaging_context() == NULL) {
904 return 1;
905 }
906
907#ifndef SYNC_DNS
908 /* Setup the async dns. We do it here so it doesn't have all the other
909 stuff initialised and thus chewing memory and sockets */
910 if(lp_we_are_a_wins_server() && lp_dns_proxy()) {
911 start_async_dns();
912 }
913#endif
914
915 if (!directory_exist(lp_lockdir())) {
916 mkdir(lp_lockdir(), 0755);
917 }
918
919 pidfile_create("nmbd");
920
921 if (!NT_STATUS_IS_OK(reinit_after_fork(nmbd_messaging_context(),
922 nmbd_event_context(), false))) {
923 DEBUG(0,("reinit_after_fork() failed\n"));
924 exit(1);
925 }
926
927 if (!nmbd_setup_sig_term_handler())
928 exit(1);
929 if (!nmbd_setup_sig_hup_handler())
930 exit(1);
931
932 /* get broadcast messages */
933 claim_connection(NULL,"",FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP);
934
935 messaging_register(nmbd_messaging_context(), NULL,
936 MSG_FORCE_ELECTION, nmbd_message_election);
937#if 0
938 /* Until winsrepl is done. */
939 messaging_register(nmbd_messaging_context(), NULL,
940 MSG_WINS_NEW_ENTRY, nmbd_wins_new_entry);
941#endif
942 messaging_register(nmbd_messaging_context(), NULL,
943 MSG_SHUTDOWN, nmbd_terminate);
944 messaging_register(nmbd_messaging_context(), NULL,
945 MSG_SMB_CONF_UPDATED, msg_reload_nmbd_services);
946 messaging_register(nmbd_messaging_context(), NULL,
947 MSG_SEND_PACKET, msg_nmbd_send_packet);
948
949 TimeInit();
950
951 DEBUG( 3, ( "Opening sockets %d\n", global_nmb_port ) );
952
953 if ( !open_sockets( is_daemon, global_nmb_port ) ) {
954 kill_async_dns_child();
955 return 1;
956 }
957
958 /* Determine all the IP addresses we have. */
959 load_interfaces();
960
961 /* Create an nmbd subnet record for each of the above. */
962 if( False == create_subnets() ) {
963 DEBUG(0,("ERROR: Failed when creating subnet lists. Exiting.\n"));
964 kill_async_dns_child();
965 exit(1);
966 }
967
968 /* Load in any static local names. */
969 if (p_lmhosts) {
970 set_dyn_LMHOSTSFILE(p_lmhosts);
971 }
972 load_lmhosts_file(get_dyn_LMHOSTSFILE());
973 DEBUG(3,("Loaded hosts file %s\n", get_dyn_LMHOSTSFILE()));
974
975 /* If we are acting as a WINS server, initialise data structures. */
976 if( !initialise_wins() ) {
977 DEBUG( 0, ( "nmbd: Failed when initialising WINS server.\n" ) );
978 kill_async_dns_child();
979 exit(1);
980 }
981
982 /*
983 * Register nmbd primary workgroup and nmbd names on all
984 * the broadcast subnets, and on the WINS server (if specified).
985 * Also initiate the startup of our primary workgroup (start
986 * elections if we are setup as being able to be a local
987 * master browser.
988 */
989
990 if( False == register_my_workgroup_and_names() ) {
991 DEBUG(0,("ERROR: Failed when creating my my workgroup. Exiting.\n"));
992 kill_async_dns_child();
993 exit(1);
994 }
995
996 if (!initialize_nmbd_proxy_logon()) {
997 DEBUG(0,("ERROR: Failed setup nmbd_proxy_logon.\n"));
998 kill_async_dns_child();
999 exit(1);
1000 }
1001
1002 TALLOC_FREE(frame);
1003 process();
1004
1005 if (dbf)
1006 x_fclose(dbf);
1007 kill_async_dns_child();
1008 return(0);
1009}
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