2 Unix SMB/Netbios implementation.
4 NBT netbios routines and daemon - version 2
5 Copyright (C) Andrew Tridgell 1994-1997
6 Copyright (C) Luke Kenneth Casson Leighton 1994-1997
7 Copyright (C) Jeremy Allison 1994-1997
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 myname;
32 extern fstring myworkgroup;
34 /* This is our local master browser list database. */
35 extern struct browse_cache_record *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;
104 DEBUG(2,("%s: sync_browse_lists: Sync browse lists with server %s<%02x> at IP %s for workgroup %s\n",
105 timestring(), name, nm_type, inet_ntoa(ip), work->work_group ));
107 /* Check we're not trying to sync with ourselves. This can happen if we are
108 a domain *and* a local master browser. */
111 DEBUG(2,("sync_browse_lists: We are both a domain and a local master browser for workgroup %s. \
112 Do not sync with ourselves.\n", work->work_group ));
116 if (!cli_initialise(&cli) || !cli_connect(&cli, name, &ip))
118 DEBUG(0,("sync_browse_lists: Failed to start browse sync with %s\n", name));
122 if (!cli_session_request(&cli, name, nm_type, local_machine))
124 DEBUG(0,("sync_browse_lists: %s rejected the browse sync session\n",name));
129 if (!cli_negprot(&cli))
131 DEBUG(0,("sync_browse_lists: %s rejected the negprot\n",name));
136 if (!cli_session_setup(&cli, "", "", 1, "", 0, work->work_group))
138 DEBUG(0,("sync_browse_lists: %s rejected the browse sync sessionsetup\n",
144 if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1))
146 DEBUG(0,("sync_browse_lists: %s refused browse sync IPC$ connect\n", name));
152 call_subrec = subrec;
154 /* Fetch a workgroup list. */
155 cli_NetServerEnum(&cli, work->work_group,
156 local_type|SV_TYPE_DOMAIN_ENUM,
159 /* Now fetch a server list. */
160 cli_NetServerEnum(&cli, work->work_group,
161 local?SV_TYPE_LOCAL_LIST_ONLY:SV_TYPE_ALL,
167 /****************************************************************************
168 As a domain master browser, do a sync with a local master browser.
169 **************************************************************************/
171 static void sync_with_lmb(struct browse_cache_record *browc)
173 struct work_record *work;
175 if (!(work = find_workgroup_on_subnet(unicast_subnet, browc->work_group))) {
176 DEBUG(0, ("sync_with_lmb: failed to get a \
177 workgroup for a local master browser cache entry workgroup %s, server %s\n",
178 browc->work_group, browc->lmb_name));
182 /* We should only be doing this if we are a domain master browser for
183 the given workgroup. Ensure this is so. */
185 if(!AM_DOMAIN_MASTER_BROWSER(work))
187 DEBUG(0,("sync_with_lmb: We are trying to sync with a local master browser %s \
188 for workgroup %s and we are not a domain master browser on this workgroup. Error !\n",
189 browc->lmb_name, browc->work_group));
193 DEBUG(2, ("sync_with_lmb: Initiating sync with local master browser %s<0x20> at IP %s for \
194 workgroup %s\n", browc->lmb_name, inet_ntoa(browc->ip), browc->work_group));
196 sync_browse_lists(unicast_subnet, work, browc->lmb_name, 0x20, browc->ip, True);
198 browc->sync_time += (CHECK_TIME_DMB_TO_LMB_SYNC * 60);
201 /****************************************************************************
202 Sync or expire any local master browsers.
203 **************************************************************************/
205 void dmb_expire_and_sync_browser_lists(time_t t)
207 static time_t last_run = 0;
208 struct browse_cache_record *browc;
210 /* Only do this every 20 seconds. */
211 if (t - last_run < 20)
216 expire_lmb_browsers(t);
218 for (browc = lmb_browserlist; browc; browc = browc->next)
220 if (browc->sync_time < t)
221 sync_with_lmb(browc);
225 /****************************************************************************
226 As a local master browser, send an announce packet to the domain master browser.
227 **************************************************************************/
229 static void announce_local_master_browser_to_domain_master_browser( struct work_record *work)
234 if(ismyip(work->dmb_addr))
236 DEBUG(2,("announce_local_master_browser_to_domain_master_browser: We are both a domain \
237 and a local master browser for workgroup %s. \
238 Do not announce to ourselves.\n", work->work_group ));
242 bzero(outbuf,sizeof(outbuf));
244 CVAL(p,0) = ANN_MasterAnnouncement;
247 StrnCpy(p,myname,15);
249 p = skip_string(p,1);
251 DEBUG(4,("announce_local_master_browser_to_domain_master_browser: Sending local master announce \
252 to %s for workgroup %s.\n", namestr(&work->dmb_name), work->work_group ));
254 send_mailslot(True, BROWSE_MAILSLOT, outbuf,PTR_DIFF(p,outbuf),
255 myname, 0x0, work->dmb_name.name, 0x20, work->dmb_addr, FIRST_SUBNET->myip);
259 /****************************************************************************
260 As a local master browser, do a sync with a domain master browser.
261 **************************************************************************/
263 static void sync_with_dmb(struct work_record *work)
265 DEBUG(2, ("sync_with_dmb: Initiating sync with domain master browser %s at IP %s for \
266 workgroup %s\n", namestr(&work->dmb_name), inet_ntoa(work->dmb_addr), work->work_group));
268 sync_browse_lists(unicast_subnet, work, work->dmb_name.name, work->dmb_name.name_type,
269 work->dmb_addr, False);
272 /****************************************************************************
273 Function called when a node status query to a domain master browser IP succeeds.
274 ****************************************************************************/
276 static void domain_master_node_status_success(struct subnet_record *subrec,
277 struct userdata_struct *userdata,
278 struct res_rec *answers,
279 struct in_addr from_ip)
281 struct work_record *work = find_workgroup_on_subnet( subrec, userdata->data);
285 DEBUG(0,("domain_master_node_status_success: Unable to find workgroup %s on subnet %s.\n",
286 userdata->data, subrec->subnet_name));
290 DEBUG(3,("domain_master_node_status_success: Success in node status for workgroup %s from ip %s\n",
291 work->work_group, inet_ntoa(from_ip) ));
293 /* Go through the list of names found at answers->rdata and look for
294 the first SERVER<0x20> name. */
296 if(answers->rdata != NULL)
298 char *p = answers->rdata;
299 int numnames = CVAL(p, 0);
310 name_type = CVAL(p,15);
311 nb_flags = get_nb_flags(&p[16]);
312 trim_string(qname,NULL," ");
316 if(!(nb_flags & NB_GROUP) && (name_type == 0x20))
318 struct nmb_name nmbname;
320 make_nmb_name(&nmbname, qname, name_type, scope);
322 /* Copy the dmb name and IP address
323 into the workgroup struct. */
325 work->dmb_name = nmbname;
326 putip((char *)&work->dmb_addr, &from_ip);
328 /* Do the local master browser announcement to the domain
329 master browser name and IP. */
330 announce_local_master_browser_to_domain_master_browser( work );
332 /* Now synchronise lists with the domain master browser. */
339 DEBUG(0,("domain_master_node_status_success: Failed to find a SERVER<0x20> \
340 name in reply from IP %s.\n", inet_ntoa(from_ip) ));
343 /****************************************************************************
344 Function called when a node status query to a domain master browser IP fails.
345 ****************************************************************************/
347 static void domain_master_node_status_fail(struct subnet_record *subrec,
348 struct response_record *rrec)
350 struct userdata_struct *userdata = rrec->userdata;
352 DEBUG(0,("domain_master_node_status_fail: Doing a node status request to \
353 the domain master browser for workgroup %s at IP %s failed. Cannot sync browser \
354 lists.\n", userdata->data, inet_ntoa(rrec->packet->ip) ));
358 /****************************************************************************
359 Function called when a query for a WORKGROUP<1b> name succeeds.
360 ****************************************************************************/
362 static void find_domain_master_name_query_success(struct subnet_record *subrec,
363 struct userdata_struct *userdata_in,
364 struct nmb_name *q_name, struct in_addr answer_ip, struct res_rec *rrec)
367 * Unfortunately, finding the IP address of the Domain Master Browser,
368 * as we have here, is not enough. We need to now do a sync to the
369 * SERVERNAME<0x20> NetBIOS name, as only recent NT servers will
370 * respond to the SMBSERVER name. To get this name from IP
371 * address we do a Node status request, and look for the first
372 * NAME<0x20> in the response, and take that as the server name.
373 * We also keep a cache of the Domain Master Browser name for this
374 * workgroup in the Workgroup struct, so that if the same IP addess
375 * is returned every time, we don't need to do the node status
379 struct work_record *work;
380 struct nmb_name nmbname;
381 struct userdata_struct *userdata;
382 char ud[sizeof(struct userdata_struct) + sizeof(fstring)+1];
384 if (!(work = find_workgroup_on_subnet(subrec, q_name->name))) {
385 DEBUG(0, ("find_domain_master_name_query_success: failed to find \
386 workgroup %s\n", q_name->name ));
390 /* First check if we already have a dmb for this workgroup. */
392 if(!ip_equal(work->dmb_addr, ipzero) && ip_equal(work->dmb_addr, answer_ip))
394 /* Do the local master browser announcement to the domain
395 master browser name and IP. */
396 announce_local_master_browser_to_domain_master_browser( work );
398 /* Now synchronise lists with the domain master browser. */
403 putip((char *)&work->dmb_addr, &ipzero);
405 /* Now initiate the node status request. */
406 bzero((char *)&nmbname, sizeof(nmbname));
407 nmbname.name[0] = '*';
409 /* Put the workgroup name into the userdata so we know
410 what workgroup we're talking to when the reply comes
413 /* Setup the userdata_struct - this is copied so we can use
414 a stack variable for this. */
415 userdata = (struct userdata_struct *)ud;
417 userdata->copy_fn = NULL;
418 userdata->free_fn = NULL;
419 userdata->userdata_len = strlen(work->work_group)+1;
420 strcpy(userdata->data, work->work_group);
422 node_status( subrec, &nmbname, answer_ip,
423 domain_master_node_status_success,
424 domain_master_node_status_fail,
428 /****************************************************************************
429 Function called when a query for a WORKGROUP<1b> name fails.
430 ****************************************************************************/
431 static void find_domain_master_name_query_fail(struct subnet_record *subrec,
432 struct response_record *rrec,
433 struct nmb_name *question_name, int fail_code)
435 DEBUG(0,("find_domain_master_name_query_fail: Unable to find the Domain Master \
436 Browser name %s for the workgroup %s. Unable to sync browse lists in this workgroup.\n",
437 namestr(question_name), question_name->name ));
440 /****************************************************************************
441 As a local master browser for a workgroup find the domain master browser
442 name, announce ourselves as local master browser to it and then pull the
443 full domain browse lists from it onto the given subnet.
444 **************************************************************************/
446 void announce_and_sync_with_domain_master_browser( struct subnet_record *subrec,
447 struct work_record *work)
449 struct nmb_name nmbname;
451 /* Only do this if we are using a WINS server. */
452 if(we_are_a_wins_client() == False)
454 DEBUG(10,("announce_and_sync_with_domain_master_browser: Ignoring as we are not a WINS client.\n"));
458 make_nmb_name(&nmbname,work->work_group,0x1b,scope);
460 /* First, query for the WORKGROUP<1b> name from the WINS server. */
461 query_name(unicast_subnet, nmbname.name, nmbname.name_type,
462 find_domain_master_name_query_success,
463 find_domain_master_name_query_fail,
468 /****************************************************************************
469 Function called when a node status query to a domain master browser IP succeeds.
470 This function is only called on query to a Samba 1.9.18 or above WINS server.
472 Note that adding the workgroup name is enough for this workgroup to be
473 browsable by clients, as clients query the WINS server or broadcast
474 nets for the WORKGROUP<1b> name when they want to browse a workgroup
475 they are not in. We do not need to do a sync with this Domain Master
476 Browser in order for our browse clients to see machines in this workgroup.
478 ****************************************************************************/
480 static void get_domain_master_name_node_status_success(struct subnet_record *subrec,
481 struct userdata_struct *userdata,
482 struct res_rec *answers,
483 struct in_addr from_ip)
485 struct work_record *work;
487 DEBUG(3,("get_domain_master_name_node_status_success: Success in node status from ip %s\n",
488 inet_ntoa(from_ip) ));
491 * Go through the list of names found at answers->rdata and look for
492 * the first WORKGROUP<0x1b> name.
495 if(answers->rdata != NULL)
497 char *p = answers->rdata;
498 int numnames = CVAL(p, 0);
509 name_type = CVAL(p,15);
510 nb_flags = get_nb_flags(&p[16]);
511 trim_string(qname,NULL," ");
515 if(!(nb_flags & NB_GROUP) && (name_type == 0x1b))
518 DEBUG(5,("get_domain_master_name_node_status_success: IP %s is a domain \
519 master browser for workgroup %s. Adding this name.\n", inet_ntoa(from_ip), qname ));
522 * If we don't already know about this workgroup, add it
523 * to the workgroup list on the unicast_subnet.
525 if((work = find_workgroup_on_subnet( subrec, qname)) == NULL)
528 * Add it - with an hour in the cache.
530 if((work = create_workgroup_on_subnet(subrec, qname, 60*60))==NULL)
538 DEBUG(0,("get_domain_master_name_node_status_success: Failed to find a WORKGROUP<0x1b> \
539 name in reply from IP %s.\n", inet_ntoa(from_ip) ));
542 /****************************************************************************
543 Function called when a node status query to a domain master browser IP fails.
544 ****************************************************************************/
546 static void get_domain_master_name_node_status_fail(struct subnet_record *subrec,
547 struct response_record *rrec)
549 DEBUG(0,("get_domain_master_name_node_status_fail: Doing a node status request to \
550 the domain master browser at IP %s failed. Cannot get workgroup name.\n",
551 inet_ntoa(rrec->packet->ip) ));
554 /****************************************************************************
555 Function called when a query for *<1b> name succeeds.
556 ****************************************************************************/
558 static void find_all_domain_master_names_query_success(struct subnet_record *subrec,
559 struct userdata_struct *userdata_in,
560 struct nmb_name *q_name, struct in_addr answer_ip, struct res_rec *rrec)
563 * We now have a list of all the domain master browsers for all workgroups
564 * that have registered with the WINS server. Now do a node status request
565 * to each one and look for the first 1b name in the reply. This will be
566 * the workgroup name that we will add to the unicast subnet as a 'non-local'
570 struct nmb_name nmbname;
571 struct in_addr send_ip;
574 DEBUG(5,("find_all_domain_master_names_query_succes: Got answer from WINS server of %d \
575 IP addresses for Domain Master Browsers.\n", rrec->rdlength / 6 ));
577 for(i = 0; i < rrec->rdlength / 6; i++)
579 /* Initiate the node status requests. */
580 bzero((char *)&nmbname, sizeof(nmbname));
581 nmbname.name[0] = '*';
583 putip((char *)&send_ip, (char *)&rrec->rdata[(i*6) + 2]);
586 * Don't send node status requests to ourself.
589 if(ismyip( send_ip ))
591 DEBUG(5,("find_all_domain_master_names_query_succes: Not sending node status \
592 to our own IP %s.\n", inet_ntoa(send_ip) ));
596 DEBUG(5,("find_all_domain_master_names_query_succes: sending node status request to \
597 IP %s.\n", inet_ntoa(send_ip) ));
599 node_status( subrec, &nmbname, send_ip,
600 get_domain_master_name_node_status_success,
601 get_domain_master_name_node_status_fail,
606 /****************************************************************************
607 Function called when a query for *<1b> name fails.
608 ****************************************************************************/
609 static void find_all_domain_master_names_query_fail(struct subnet_record *subrec,
610 struct response_record *rrec,
611 struct nmb_name *question_name, int fail_code)
613 DEBUG(10,("find_domain_master_name_query_fail: WINS server did not reply to a query \
614 for name %s. This means it is probably not a Samba 1.9.18 or above WINS server.\n",
615 namestr(question_name) ));
618 /****************************************************************************
619 If we are a domain master browser on the unicast subnet, do a query to the
620 WINS server for the *<1b> name. This will only work to a Samba WINS server,
621 so ignore it if we fail. If we succeed, contact each of the IP addresses in
622 turn and do a node status request to them. If this succeeds then look for a
623 <1b> name in the reply - this is the workgroup name. Add this to the unicast
624 subnet. This is expensive, so we only do this every 15 minutes.
625 **************************************************************************/
627 void collect_all_workgroup_names_from_wins_server(time_t t)
629 static time_t lastrun = 0;
630 struct work_record *work;
631 struct nmb_name nmbname;
633 /* Only do this if we are using a WINS server. */
634 if(we_are_a_wins_client() == False)
637 /* Check to see if we are a domain master browser on the unicast subnet. */
638 if((work = find_workgroup_on_subnet( unicast_subnet, myworkgroup)) == NULL)
640 DEBUG(0,("collect_all_workgroup_names_from_wins_server: Cannot find my workgroup %s on subnet %s.\n",
641 myworkgroup, unicast_subnet->subnet_name ));
645 if(!AM_DOMAIN_MASTER_BROWSER(work))
648 if ((lastrun != 0) && (t < lastrun + (15 * 60)))
653 make_nmb_name(&nmbname,"*",0x1b,scope);
655 /* First, query for the *<1b> name from the WINS server. */
656 query_name(unicast_subnet, nmbname.name, nmbname.name_type,
657 find_all_domain_master_names_query_success,
658 find_all_domain_master_names_query_fail,