2 Unix SMB/Netbios implementation.
4 NBT netbios routines and daemon - version 2
5 Copyright (C) Andrew Tridgell 1994-1998
6 Copyright (C) Luke Kenneth Casson Leighton 1994-1998
7 Copyright (C) Jeremy Allison 1994-1998
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 extern int DEBUGLEVEL;
30 extern struct in_addr ipzero;
31 extern pstring global_myname;
32 extern fstring global_myworkgroup;
34 /* This is our local master browser list database. */
35 extern struct ubi_dlList lmb_browserlist[];
37 static struct work_record *call_work;
38 static struct subnet_record *call_subrec;
40 /*******************************************************************
41 This is the NetServerEnum callback.
42 ******************************************************************/
44 static void callback(char *sname, uint32 stype, char *comment)
46 struct work_record *work;
48 stype &= ~SV_TYPE_LOCAL_LIST_ONLY;
50 if (stype & SV_TYPE_DOMAIN_ENUM)
52 /* See if we can find the workgroup on this subnet. */
53 if(( work = find_workgroup_on_subnet( call_subrec, sname )) != NULL)
55 /* We already know about this workgroup - update the ttl. */
56 update_workgroup_ttl( work, lp_max_ttl() );
60 /* Create the workgroup on the subnet. */
61 create_workgroup_on_subnet( call_subrec, sname, lp_max_ttl() );
67 struct server_record *servrec;
71 if(( servrec = find_server_in_workgroup( work, sname )) != NULL)
73 /* Check that this is not a locally known server - if so ignore the
75 if(!(servrec->serv.type & SV_TYPE_LOCAL_LIST_ONLY))
77 /* We already know about this server - update the ttl. */
78 update_server_ttl(servrec, lp_max_ttl() );
79 /* Update the type. */
80 servrec->serv.type = stype;
85 /* Create the server in the workgroup. */
86 create_server_on_workgroup(work, sname,stype,lp_max_ttl(),comment);
91 /*******************************************************************
92 Synchronise browse lists with another browse server.
93 Log in on the remote server's SMB port to their IPC$ service,
94 do a NetServerEnum and update our server and workgroup databases.
95 ******************************************************************/
97 static void sync_browse_lists(struct subnet_record *subrec, struct work_record *work,
98 char *name, int nm_type, struct in_addr ip, BOOL local)
100 extern fstring local_machine;
101 static struct cli_state cli;
102 uint32 local_type = local ? SV_TYPE_LOCAL_LIST_ONLY : 0;
106 dbgtext( "sync_browse_lists():\n" );
107 dbgtext( "Sync browse lists with server %s<%02x> ", name, nm_type );
108 dbgtext( "at IP %s ", inet_ntoa( ip ) );
109 dbgtext( "for workgroup %s\n", work->work_group );
112 /* Check we're not trying to sync with ourselves. This can happen if we are
113 a domain *and* a local master browser. */
116 DEBUG(2,("sync_browse_lists: We are both a domain and a local master browser for workgroup %s. \
117 Do not sync with ourselves.\n", work->work_group ));
121 if (!cli_initialise(&cli) || !cli_connect(&cli, name, &ip))
123 DEBUG(0,("sync_browse_lists: Failed to start browse sync with %s\n", name));
127 if (!cli_session_request(&cli, name, nm_type, local_machine))
129 DEBUG(0,("sync_browse_lists: %s rejected the browse sync session\n",name));
134 if (!cli_negprot(&cli))
136 DEBUG(0,("sync_browse_lists: %s rejected the negprot\n",name));
141 if (!cli_session_setup(&cli, "", "", 1, "", 0, work->work_group))
143 DEBUG(0,("sync_browse_lists: %s rejected the browse sync sessionsetup\n",
149 if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1))
151 DEBUG(0,("sync_browse_lists: %s refused browse sync IPC$ connect\n", name));
157 call_subrec = subrec;
159 /* Fetch a workgroup list. */
160 cli_NetServerEnum(&cli, work->work_group,
161 local_type|SV_TYPE_DOMAIN_ENUM,
164 /* Now fetch a server list. */
165 cli_NetServerEnum(&cli, work->work_group,
166 local?SV_TYPE_LOCAL_LIST_ONLY:SV_TYPE_ALL,
172 /****************************************************************************
173 As a domain master browser, do a sync with a local master browser.
174 **************************************************************************/
176 static void sync_with_lmb(struct browse_cache_record *browc)
178 struct work_record *work;
180 if (!(work = find_workgroup_on_subnet(unicast_subnet, browc->work_group))) {
181 DEBUG(0, ("sync_with_lmb: failed to get a \
182 workgroup for a local master browser cache entry workgroup %s, server %s\n",
183 browc->work_group, browc->lmb_name));
187 /* We should only be doing this if we are a domain master browser for
188 the given workgroup. Ensure this is so. */
190 if(!AM_DOMAIN_MASTER_BROWSER(work))
192 DEBUG(0,("sync_with_lmb: We are trying to sync with a local master browser %s \
193 for workgroup %s and we are not a domain master browser on this workgroup. Error !\n",
194 browc->lmb_name, browc->work_group));
198 DEBUG(2, ("sync_with_lmb: Initiating sync with local master browser %s<0x20> at IP %s for \
199 workgroup %s\n", browc->lmb_name, inet_ntoa(browc->ip), browc->work_group));
201 sync_browse_lists(unicast_subnet, work, browc->lmb_name, 0x20, browc->ip, True);
203 browc->sync_time += (CHECK_TIME_DMB_TO_LMB_SYNC * 60);
206 /****************************************************************************
207 Sync or expire any local master browsers.
208 **************************************************************************/
210 void dmb_expire_and_sync_browser_lists(time_t t)
212 static time_t last_run = 0;
213 struct browse_cache_record *browc;
215 /* Only do this every 20 seconds. */
216 if (t - last_run < 20)
221 expire_lmb_browsers(t);
223 for( browc = (struct browse_cache_record *)ubi_dlFirst( lmb_browserlist );
225 browc = (struct browse_cache_record *)ubi_dlNext( browc ) )
227 if (browc->sync_time < t)
228 sync_with_lmb(browc);
232 /****************************************************************************
233 As a local master browser, send an announce packet to the domain master browser.
234 **************************************************************************/
236 static void announce_local_master_browser_to_domain_master_browser( struct work_record *work)
241 if(ismyip(work->dmb_addr))
243 DEBUG(2,("announce_local_master_browser_to_domain_master_browser: We are both a domain \
244 and a local master browser for workgroup %s. \
245 Do not announce to ourselves.\n", work->work_group ));
249 bzero(outbuf,sizeof(outbuf));
251 CVAL(p,0) = ANN_MasterAnnouncement;
254 StrnCpy(p,global_myname,15);
256 p = skip_string(p,1);
258 DEBUG(4,("announce_local_master_browser_to_domain_master_browser: Sending local master announce \
259 to %s for workgroup %s.\n", namestr(&work->dmb_name), work->work_group ));
261 send_mailslot(True, BROWSE_MAILSLOT, outbuf,PTR_DIFF(p,outbuf),
262 global_myname, 0x0, work->dmb_name.name, 0x0, work->dmb_addr, FIRST_SUBNET->myip);
266 /****************************************************************************
267 As a local master browser, do a sync with a domain master browser.
268 **************************************************************************/
270 static void sync_with_dmb(struct work_record *work)
272 DEBUG(2, ("sync_with_dmb: Initiating sync with domain master browser %s at IP %s for \
273 workgroup %s\n", namestr(&work->dmb_name), inet_ntoa(work->dmb_addr), work->work_group));
275 sync_browse_lists(unicast_subnet, work, work->dmb_name.name, work->dmb_name.name_type,
276 work->dmb_addr, False);
279 /****************************************************************************
280 Function called when a node status query to a domain master browser IP succeeds.
281 ****************************************************************************/
283 static void domain_master_node_status_success(struct subnet_record *subrec,
284 struct userdata_struct *userdata,
285 struct res_rec *answers,
286 struct in_addr from_ip)
288 struct work_record *work = find_workgroup_on_subnet( subrec, userdata->data);
292 DEBUG(0,("domain_master_node_status_success: Unable to find workgroup %s on subnet %s.\n",
293 userdata->data, subrec->subnet_name));
297 DEBUG(3,("domain_master_node_status_success: Success in node status for workgroup %s from ip %s\n",
298 work->work_group, inet_ntoa(from_ip) ));
300 /* Go through the list of names found at answers->rdata and look for
301 the first SERVER<0x20> name. */
303 if(answers->rdata != NULL)
305 char *p = answers->rdata;
306 int numnames = CVAL(p, 0);
317 name_type = CVAL(p,15);
318 nb_flags = get_nb_flags(&p[16]);
319 trim_string(qname,NULL," ");
323 if(!(nb_flags & NB_GROUP) && (name_type == 0x20))
325 struct nmb_name nmbname;
327 make_nmb_name(&nmbname, qname, name_type, scope);
329 /* Copy the dmb name and IP address
330 into the workgroup struct. */
332 work->dmb_name = nmbname;
333 putip((char *)&work->dmb_addr, &from_ip);
335 /* Do the local master browser announcement to the domain
336 master browser name and IP. */
337 announce_local_master_browser_to_domain_master_browser( work );
339 /* Now synchronise lists with the domain master browser. */
346 DEBUG(0,("domain_master_node_status_success: Failed to find a SERVER<0x20> \
347 name in reply from IP %s.\n", inet_ntoa(from_ip) ));
350 /****************************************************************************
351 Function called when a node status query to a domain master browser IP fails.
352 ****************************************************************************/
354 static void domain_master_node_status_fail(struct subnet_record *subrec,
355 struct response_record *rrec)
357 struct userdata_struct *userdata = rrec->userdata;
359 DEBUG(0,("domain_master_node_status_fail: Doing a node status request to \
360 the domain master browser for workgroup %s at IP %s failed. Cannot sync browser \
361 lists.\n", userdata->data, inet_ntoa(rrec->packet->ip) ));
365 /****************************************************************************
366 Function called when a query for a WORKGROUP<1b> name succeeds.
367 ****************************************************************************/
369 static void find_domain_master_name_query_success(struct subnet_record *subrec,
370 struct userdata_struct *userdata_in,
371 struct nmb_name *q_name, struct in_addr answer_ip, struct res_rec *rrec)
374 * Unfortunately, finding the IP address of the Domain Master Browser,
375 * as we have here, is not enough. We need to now do a sync to the
376 * SERVERNAME<0x20> NetBIOS name, as only recent NT servers will
377 * respond to the SMBSERVER name. To get this name from IP
378 * address we do a Node status request, and look for the first
379 * NAME<0x20> in the response, and take that as the server name.
380 * We also keep a cache of the Domain Master Browser name for this
381 * workgroup in the Workgroup struct, so that if the same IP addess
382 * is returned every time, we don't need to do the node status
386 struct work_record *work;
387 struct nmb_name nmbname;
388 struct userdata_struct *userdata;
390 if (!(work = find_workgroup_on_subnet(subrec, q_name->name))) {
391 DEBUG(0, ("find_domain_master_name_query_success: failed to find \
392 workgroup %s\n", q_name->name ));
396 /* First check if we already have a dmb for this workgroup. */
398 if(!ip_equal(work->dmb_addr, ipzero) && ip_equal(work->dmb_addr, answer_ip))
400 /* Do the local master browser announcement to the domain
401 master browser name and IP. */
402 announce_local_master_browser_to_domain_master_browser( work );
404 /* Now synchronise lists with the domain master browser. */
409 putip((char *)&work->dmb_addr, &ipzero);
411 /* Now initiate the node status request. */
412 bzero((char *)&nmbname, sizeof(nmbname));
413 nmbname.name[0] = '*';
415 /* Put the workgroup name into the userdata so we know
416 what workgroup we're talking to when the reply comes
419 /* Setup the userdata_struct - this is copied so we can use
420 a stack variable for this. */
421 if((userdata = (struct userdata_struct *)malloc(sizeof(struct userdata_struct) + sizeof(fstring)+1)) == NULL)
423 DEBUG(0, ("find_domain_master_name_query_success: malloc fail.\n"));
427 userdata->copy_fn = NULL;
428 userdata->free_fn = NULL;
429 userdata->userdata_len = strlen(work->work_group)+1;
430 pstrcpy(userdata->data, work->work_group);
432 node_status( subrec, &nmbname, answer_ip,
433 domain_master_node_status_success,
434 domain_master_node_status_fail,
437 free((char *)userdata);
440 /****************************************************************************
441 Function called when a query for a WORKGROUP<1b> name fails.
442 ****************************************************************************/
443 static void find_domain_master_name_query_fail(struct subnet_record *subrec,
444 struct response_record *rrec,
445 struct nmb_name *question_name, int fail_code)
447 DEBUG(0,("find_domain_master_name_query_fail: Unable to find the Domain Master \
448 Browser name %s for the workgroup %s. Unable to sync browse lists in this workgroup.\n",
449 namestr(question_name), question_name->name ));
452 /****************************************************************************
453 As a local master browser for a workgroup find the domain master browser
454 name, announce ourselves as local master browser to it and then pull the
455 full domain browse lists from it onto the given subnet.
456 **************************************************************************/
458 void announce_and_sync_with_domain_master_browser( struct subnet_record *subrec,
459 struct work_record *work)
461 struct nmb_name nmbname;
463 /* Only do this if we are using a WINS server. */
464 if(we_are_a_wins_client() == False)
466 DEBUG(10,("announce_and_sync_with_domain_master_browser: Ignoring as we are not a WINS client.\n"));
470 make_nmb_name(&nmbname,work->work_group,0x1b,scope);
472 /* First, query for the WORKGROUP<1b> name from the WINS server. */
473 query_name(unicast_subnet, nmbname.name, nmbname.name_type,
474 find_domain_master_name_query_success,
475 find_domain_master_name_query_fail,
480 /****************************************************************************
481 Function called when a node status query to a domain master browser IP succeeds.
482 This function is only called on query to a Samba 1.9.18 or above WINS server.
484 Note that adding the workgroup name is enough for this workgroup to be
485 browsable by clients, as clients query the WINS server or broadcast
486 nets for the WORKGROUP<1b> name when they want to browse a workgroup
487 they are not in. We do not need to do a sync with this Domain Master
488 Browser in order for our browse clients to see machines in this workgroup.
490 ****************************************************************************/
492 static void get_domain_master_name_node_status_success(struct subnet_record *subrec,
493 struct userdata_struct *userdata,
494 struct res_rec *answers,
495 struct in_addr from_ip)
497 struct work_record *work;
499 DEBUG(3,("get_domain_master_name_node_status_success: Success in node status from ip %s\n",
500 inet_ntoa(from_ip) ));
503 * Go through the list of names found at answers->rdata and look for
504 * the first WORKGROUP<0x1b> name.
507 if(answers->rdata != NULL)
509 char *p = answers->rdata;
510 int numnames = CVAL(p, 0);
521 name_type = CVAL(p,15);
522 nb_flags = get_nb_flags(&p[16]);
523 trim_string(qname,NULL," ");
527 if(!(nb_flags & NB_GROUP) && (name_type == 0x1b))
530 DEBUG(5,("get_domain_master_name_node_status_success: IP %s is a domain \
531 master browser for workgroup %s. Adding this name.\n", inet_ntoa(from_ip), qname ));
534 * If we don't already know about this workgroup, add it
535 * to the workgroup list on the unicast_subnet.
537 if((work = find_workgroup_on_subnet( subrec, qname)) == NULL)
540 * Add it - with an hour in the cache.
542 if((work = create_workgroup_on_subnet(subrec, qname, 60*60))==NULL)
550 DEBUG(0,("get_domain_master_name_node_status_success: Failed to find a WORKGROUP<0x1b> \
551 name in reply from IP %s.\n", inet_ntoa(from_ip) ));
554 /****************************************************************************
555 Function called when a node status query to a domain master browser IP fails.
556 ****************************************************************************/
558 static void get_domain_master_name_node_status_fail(struct subnet_record *subrec,
559 struct response_record *rrec)
561 DEBUG(0,("get_domain_master_name_node_status_fail: Doing a node status request to \
562 the domain master browser at IP %s failed. Cannot get workgroup name.\n",
563 inet_ntoa(rrec->packet->ip) ));
566 /****************************************************************************
567 Function called when a query for *<1b> name succeeds.
568 ****************************************************************************/
570 static void find_all_domain_master_names_query_success(struct subnet_record *subrec,
571 struct userdata_struct *userdata_in,
572 struct nmb_name *q_name, struct in_addr answer_ip, struct res_rec *rrec)
575 * We now have a list of all the domain master browsers for all workgroups
576 * that have registered with the WINS server. Now do a node status request
577 * to each one and look for the first 1b name in the reply. This will be
578 * the workgroup name that we will add to the unicast subnet as a 'non-local'
582 struct nmb_name nmbname;
583 struct in_addr send_ip;
586 DEBUG(5,("find_all_domain_master_names_query_succes: Got answer from WINS server of %d \
587 IP addresses for Domain Master Browsers.\n", rrec->rdlength / 6 ));
589 for(i = 0; i < rrec->rdlength / 6; i++)
591 /* Initiate the node status requests. */
592 bzero((char *)&nmbname, sizeof(nmbname));
593 nmbname.name[0] = '*';
595 putip((char *)&send_ip, (char *)&rrec->rdata[(i*6) + 2]);
598 * Don't send node status requests to ourself.
601 if(ismyip( send_ip ))
603 DEBUG(5,("find_all_domain_master_names_query_succes: Not sending node status \
604 to our own IP %s.\n", inet_ntoa(send_ip) ));
608 DEBUG(5,("find_all_domain_master_names_query_succes: sending node status request to \
609 IP %s.\n", inet_ntoa(send_ip) ));
611 node_status( subrec, &nmbname, send_ip,
612 get_domain_master_name_node_status_success,
613 get_domain_master_name_node_status_fail,
618 /****************************************************************************
619 Function called when a query for *<1b> name fails.
620 ****************************************************************************/
621 static void find_all_domain_master_names_query_fail(struct subnet_record *subrec,
622 struct response_record *rrec,
623 struct nmb_name *question_name, int fail_code)
625 DEBUG(10,("find_domain_master_name_query_fail: WINS server did not reply to a query \
626 for name %s. This means it is probably not a Samba 1.9.18 or above WINS server.\n",
627 namestr(question_name) ));
630 /****************************************************************************
631 If we are a domain master browser on the unicast subnet, do a query to the
632 WINS server for the *<1b> name. This will only work to a Samba WINS server,
633 so ignore it if we fail. If we succeed, contact each of the IP addresses in
634 turn and do a node status request to them. If this succeeds then look for a
635 <1b> name in the reply - this is the workgroup name. Add this to the unicast
636 subnet. This is expensive, so we only do this every 15 minutes.
637 **************************************************************************/
639 void collect_all_workgroup_names_from_wins_server(time_t t)
641 static time_t lastrun = 0;
642 struct work_record *work;
643 struct nmb_name nmbname;
645 /* Only do this if we are using a WINS server. */
646 if(we_are_a_wins_client() == False)
649 /* Check to see if we are a domain master browser on the unicast subnet. */
650 if((work = find_workgroup_on_subnet( unicast_subnet, global_myworkgroup)) == NULL)
652 DEBUG(0,("collect_all_workgroup_names_from_wins_server: Cannot find my workgroup %s on subnet %s.\n",
653 global_myworkgroup, unicast_subnet->subnet_name ));
657 if(!AM_DOMAIN_MASTER_BROWSER(work))
660 if ((lastrun != 0) && (t < lastrun + (15 * 60)))
665 make_nmb_name(&nmbname,"*",0x1b,scope);
667 /* First, query for the *<1b> name from the WINS server. */
668 query_name(unicast_subnet, nmbname.name, nmbname.name_type,
669 find_all_domain_master_names_query_success,
670 find_all_domain_master_names_query_fail,