2 Unix SMB/CIFS implementation.
3 NBT netbios routines and daemon - version 2
4 Copyright (C) Andrew Tridgell 1994-1998
5 Copyright (C) Luke Kenneth Casson Leighton 1994-1998
6 Copyright (C) Jeremy Allison 1994-1998
9 Copyright (C) John H Terpstra 1995-1998
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 extern int updatecount
;
30 extern BOOL found_lm_clients
;
32 /****************************************************************************
33 Send a browser reset packet.
34 **************************************************************************/
36 void send_browser_reset(int reset_type
, const char *to_name
, int to_type
, struct in_addr to_ip
)
41 DEBUG(3,("send_browser_reset: sending reset request type %d to %s<%02x> IP %s.\n",
42 reset_type
, to_name
, to_type
, inet_ntoa(to_ip
) ));
44 memset(outbuf
,'\0',sizeof(outbuf
));
46 SCVAL(p
,0,ANN_ResetBrowserState
);
48 SCVAL(p
,0,reset_type
);
51 send_mailslot(True
, BROWSE_MAILSLOT
, outbuf
,PTR_DIFF(p
,outbuf
),
52 global_myname(), 0x0, to_name
, to_type
, to_ip
,
53 FIRST_SUBNET
->myip
, DGRAM_PORT
);
56 /****************************************************************************
57 Broadcast a packet to the local net requesting that all servers in this
58 workgroup announce themselves to us.
59 **************************************************************************/
61 void broadcast_announce_request(struct subnet_record
*subrec
, struct work_record
*work
)
66 work
->needannounce
= True
;
68 DEBUG(3,("broadcast_announce_request: sending announce request for workgroup %s \
69 to subnet %s\n", work
->work_group
, subrec
->subnet_name
));
71 memset(outbuf
,'\0',sizeof(outbuf
));
73 SCVAL(p
,0,ANN_AnnouncementRequest
);
76 SCVAL(p
,0,work
->token
); /* (local) Unique workgroup token id. */
78 p
+= push_string(NULL
, p
+1, global_myname(), 15, STR_ASCII
|STR_UPPER
|STR_TERMINATE
);
80 send_mailslot(False
, BROWSE_MAILSLOT
, outbuf
,PTR_DIFF(p
,outbuf
),
81 global_myname(), 0x0, work
->work_group
,0x1e, subrec
->bcast_ip
,
82 subrec
->myip
, DGRAM_PORT
);
85 /****************************************************************************
86 Broadcast an announcement.
87 **************************************************************************/
89 static void send_announcement(struct subnet_record
*subrec
, int announce_type
,
90 const char *from_name
, const char *to_name
, int to_type
, struct in_addr to_ip
,
91 time_t announce_interval
,
92 const char *server_name
, int server_type
, const char *server_comment
)
97 memset(outbuf
,'\0',sizeof(outbuf
));
100 SCVAL(outbuf
,0,announce_type
);
102 /* Announcement parameters. */
103 SCVAL(p
,0,updatecount
);
104 SIVAL(p
,1,announce_interval
*1000); /* Milliseconds - despite the spec. */
106 push_string(NULL
, p
+5, server_name
, 15, STR_ASCII
|STR_UPPER
|STR_TERMINATE
);
108 SCVAL(p
,21,lp_major_announce_version()); /* Major version. */
109 SCVAL(p
,22,lp_minor_announce_version()); /* Minor version. */
111 SIVAL(p
,23,server_type
& ~SV_TYPE_LOCAL_LIST_ONLY
);
112 /* Browse version: got from NT/AS 4.00 - Value defined in smb.h (JHT). */
113 SSVAL(p
,27,BROWSER_ELECTION_VERSION
);
114 SSVAL(p
,29,BROWSER_CONSTANT
); /* Browse signature. */
116 p
+= 31 + push_string(NULL
, p
+31, server_comment
, -1, STR_ASCII
|STR_TERMINATE
);
118 send_mailslot(False
,BROWSE_MAILSLOT
, outbuf
, PTR_DIFF(p
,outbuf
),
119 from_name
, 0x0, to_name
, to_type
, to_ip
, subrec
->myip
,
123 /****************************************************************************
124 Broadcast a LanMan announcement.
125 **************************************************************************/
127 static void send_lm_announcement(struct subnet_record
*subrec
, int announce_type
,
128 char *from_name
, char *to_name
, int to_type
, struct in_addr to_ip
,
129 time_t announce_interval
,
130 char *server_name
, int server_type
, char *server_comment
)
135 memset(outbuf
,'\0',sizeof(outbuf
));
137 SSVAL(p
,0,announce_type
);
138 SIVAL(p
,2,server_type
& ~SV_TYPE_LOCAL_LIST_ONLY
);
139 SCVAL(p
,6,lp_major_announce_version()); /* Major version. */
140 SCVAL(p
,7,lp_minor_announce_version()); /* Minor version. */
141 SSVAL(p
,8,announce_interval
); /* In seconds - according to spec. */
144 p
+= push_string(NULL
, p
, server_name
, 15, STR_ASCII
|STR_UPPER
|STR_TERMINATE
);
145 p
+= push_string(NULL
, p
, server_comment
, sizeof(pstring
)-15, STR_ASCII
|STR_UPPER
|STR_TERMINATE
);
147 send_mailslot(False
,LANMAN_MAILSLOT
, outbuf
, PTR_DIFF(p
,outbuf
),
148 from_name
, 0x0, to_name
, to_type
, to_ip
, subrec
->myip
,
152 /****************************************************************************
153 We are a local master browser. Announce this to WORKGROUP<1e>.
154 ****************************************************************************/
156 static void send_local_master_announcement(struct subnet_record
*subrec
, struct work_record
*work
,
157 struct server_record
*servrec
)
159 /* Ensure we don't have the prohibited bit set. */
160 uint32 type
= servrec
->serv
.type
& ~SV_TYPE_LOCAL_LIST_ONLY
;
162 DEBUG(3,("send_local_master_announcement: type %x for name %s on subnet %s for workgroup %s\n",
163 type
, global_myname(), subrec
->subnet_name
, work
->work_group
));
165 send_announcement(subrec
, ANN_LocalMasterAnnouncement
,
166 global_myname(), /* From nbt name. */
167 work
->work_group
, 0x1e, /* To nbt name. */
168 subrec
->bcast_ip
, /* To ip. */
169 work
->announce_interval
, /* Time until next announce. */
170 global_myname(), /* Name to announce. */
171 type
, /* Type field. */
172 servrec
->serv
.comment
);
175 /****************************************************************************
176 Announce the workgroup WORKGROUP to MSBROWSE<01>.
177 ****************************************************************************/
179 static void send_workgroup_announcement(struct subnet_record
*subrec
, struct work_record
*work
)
181 DEBUG(3,("send_workgroup_announcement: on subnet %s for workgroup %s\n",
182 subrec
->subnet_name
, work
->work_group
));
184 send_announcement(subrec
, ANN_DomainAnnouncement
,
185 global_myname(), /* From nbt name. */
186 MSBROWSE
, 0x1, /* To nbt name. */
187 subrec
->bcast_ip
, /* To ip. */
188 work
->announce_interval
, /* Time until next announce. */
189 work
->work_group
, /* Name to announce. */
190 SV_TYPE_DOMAIN_ENUM
|SV_TYPE_NT
, /* workgroup announce flags. */
191 global_myname()); /* From name as comment. */
194 /****************************************************************************
195 Announce the given host to WORKGROUP<1d>.
196 ****************************************************************************/
198 static void send_host_announcement(struct subnet_record
*subrec
, struct work_record
*work
,
199 struct server_record
*servrec
)
201 /* Ensure we don't have the prohibited bits set. */
202 uint32 type
= servrec
->serv
.type
& ~SV_TYPE_LOCAL_LIST_ONLY
;
204 DEBUG(3,("send_host_announcement: type %x for host %s on subnet %s for workgroup %s\n",
205 type
, servrec
->serv
.name
, subrec
->subnet_name
, work
->work_group
));
207 send_announcement(subrec
, ANN_HostAnnouncement
,
208 servrec
->serv
.name
, /* From nbt name. */
209 work
->work_group
, 0x1d, /* To nbt name. */
210 subrec
->bcast_ip
, /* To ip. */
211 work
->announce_interval
, /* Time until next announce. */
212 servrec
->serv
.name
, /* Name to announce. */
213 type
, /* Type field. */
214 servrec
->serv
.comment
);
217 /****************************************************************************
218 Announce the given LanMan host
219 ****************************************************************************/
221 static void send_lm_host_announcement(struct subnet_record
*subrec
, struct work_record
*work
,
222 struct server_record
*servrec
, int lm_interval
)
224 /* Ensure we don't have the prohibited bits set. */
225 uint32 type
= servrec
->serv
.type
& ~SV_TYPE_LOCAL_LIST_ONLY
;
227 DEBUG(3,("send_lm_host_announcement: type %x for host %s on subnet %s for workgroup %s, ttl: %d\n",
228 type
, servrec
->serv
.name
, subrec
->subnet_name
, work
->work_group
, lm_interval
));
230 send_lm_announcement(subrec
, ANN_HostAnnouncement
,
231 servrec
->serv
.name
, /* From nbt name. */
232 work
->work_group
, 0x00, /* To nbt name. */
233 subrec
->bcast_ip
, /* To ip. */
234 lm_interval
, /* Time until next announce. */
235 servrec
->serv
.name
, /* Name to announce (fstring not netbios name struct). */
236 type
, /* Type field. */
237 servrec
->serv
.comment
);
240 /****************************************************************************
241 Announce a server record.
242 ****************************************************************************/
244 static void announce_server(struct subnet_record
*subrec
, struct work_record
*work
,
245 struct server_record
*servrec
)
247 /* Only do domain announcements if we are a master and it's
248 our primary name we're being asked to announce. */
250 if (AM_LOCAL_MASTER_BROWSER(work
) && strequal(global_myname(),servrec
->serv
.name
)) {
251 send_local_master_announcement(subrec
, work
, servrec
);
252 send_workgroup_announcement(subrec
, work
);
254 send_host_announcement(subrec
, work
, servrec
);
258 /****************************************************************************
259 Go through all my registered names on all broadcast subnets and announce
260 them if the timeout requires it.
261 **************************************************************************/
263 void announce_my_server_names(time_t t
)
265 struct subnet_record
*subrec
;
267 for (subrec
= FIRST_SUBNET
; subrec
; subrec
= NEXT_SUBNET_EXCLUDING_UNICAST(subrec
)) {
268 struct work_record
*work
= find_workgroup_on_subnet(subrec
, lp_workgroup());
271 struct server_record
*servrec
;
273 if (work
->needannounce
) {
274 /* Drop back to a max 3 minute announce. This is to prevent a
275 single lost packet from breaking things for too long. */
277 work
->announce_interval
= MIN(work
->announce_interval
,
278 CHECK_TIME_MIN_HOST_ANNCE
*60);
279 work
->lastannounce_time
= t
- (work
->announce_interval
+1);
280 work
->needannounce
= False
;
283 /* Announce every minute at first then progress to every 12 mins */
284 if ((t
- work
->lastannounce_time
) < work
->announce_interval
)
287 if (work
->announce_interval
< (CHECK_TIME_MAX_HOST_ANNCE
* 60))
288 work
->announce_interval
+= 60;
290 work
->lastannounce_time
= t
;
292 for (servrec
= work
->serverlist
; servrec
; servrec
= servrec
->next
) {
293 if (is_myname(servrec
->serv
.name
))
294 announce_server(subrec
, work
, servrec
);
300 /****************************************************************************
301 Go through all my registered names on all broadcast subnets and announce
302 them as a LanMan server if the timeout requires it.
303 **************************************************************************/
305 void announce_my_lm_server_names(time_t t
)
307 struct subnet_record
*subrec
;
308 static time_t last_lm_announce_time
=0;
309 int announce_interval
= lp_lm_interval();
310 int lm_announce
= lp_lm_announce();
312 if ((announce_interval
<= 0) || (lm_announce
<= 0)) {
313 /* user absolutely does not want LM announcements to be sent. */
317 if ((lm_announce
>= 2) && (!found_lm_clients
)) {
318 /* has been set to 2 (Auto) but no LM clients detected (yet). */
322 /* Otherwise: must have been set to 1 (Yes), or LM clients *have*
325 for (subrec
= FIRST_SUBNET
; subrec
; subrec
= NEXT_SUBNET_EXCLUDING_UNICAST(subrec
)) {
326 struct work_record
*work
= find_workgroup_on_subnet(subrec
, lp_workgroup());
329 struct server_record
*servrec
;
331 if (last_lm_announce_time
&& ((t
- last_lm_announce_time
) < announce_interval
))
334 last_lm_announce_time
= t
;
336 for (servrec
= work
->serverlist
; servrec
; servrec
= servrec
->next
) {
337 if (is_myname(servrec
->serv
.name
))
338 /* skipping equivalent of announce_server() */
339 send_lm_host_announcement(subrec
, work
, servrec
, announce_interval
);
345 /* Announce timer. Moved into global static so it can be reset
346 when a machine becomes a local master browser. */
347 static time_t announce_timer_last
=0;
349 /****************************************************************************
350 Reset the announce_timer so that a local master browser announce will be done
352 ****************************************************************************/
354 void reset_announce_timer(void)
356 announce_timer_last
= time(NULL
) - (CHECK_TIME_MST_ANNOUNCE
* 60);
359 /****************************************************************************
360 Announce myself as a local master browser to a domain master browser.
361 **************************************************************************/
363 void announce_myself_to_domain_master_browser(time_t t
)
365 struct subnet_record
*subrec
;
366 struct work_record
*work
;
368 if(!we_are_a_wins_client()) {
369 DEBUG(10,("announce_myself_to_domain_master_browser: no unicast subnet, ignoring.\n"));
373 if (!announce_timer_last
)
374 announce_timer_last
= t
;
376 if ((t
-announce_timer_last
) < (CHECK_TIME_MST_ANNOUNCE
* 60)) {
377 DEBUG(10,("announce_myself_to_domain_master_browser: t (%d) - last(%d) < %d\n",
378 (int)t
, (int)announce_timer_last
,
379 CHECK_TIME_MST_ANNOUNCE
* 60 ));
383 announce_timer_last
= t
;
385 /* Look over all our broadcast subnets to see if any of them
386 has the state set as local master browser. */
388 for (subrec
= FIRST_SUBNET
; subrec
; subrec
= NEXT_SUBNET_EXCLUDING_UNICAST(subrec
)) {
389 for (work
= subrec
->workgrouplist
; work
; work
= work
->next
) {
390 if (AM_LOCAL_MASTER_BROWSER(work
)) {
391 DEBUG(4,( "announce_myself_to_domain_master_browser: I am a local master browser for \
392 workgroup %s on subnet %s\n", work
->work_group
, subrec
->subnet_name
));
394 /* Look in nmbd_browsersync.c for the rest of this code. */
395 announce_and_sync_with_domain_master_browser(subrec
, work
);
401 /****************************************************************************
402 Announce all samba's server entries as 'gone'.
403 This must *only* be called on shutdown.
404 ****************************************************************************/
406 void announce_my_servers_removed(void)
408 int announce_interval
= lp_lm_interval();
409 int lm_announce
= lp_lm_announce();
410 struct subnet_record
*subrec
;
412 for (subrec
= FIRST_SUBNET
; subrec
; subrec
= NEXT_SUBNET_EXCLUDING_UNICAST(subrec
)) {
413 struct work_record
*work
;
414 for (work
= subrec
->workgrouplist
; work
; work
= work
->next
) {
415 struct server_record
*servrec
;
417 work
->announce_interval
= 0;
418 for (servrec
= work
->serverlist
; servrec
; servrec
= servrec
->next
) {
419 if (!is_myname(servrec
->serv
.name
))
421 servrec
->serv
.type
= 0;
422 if(AM_LOCAL_MASTER_BROWSER(work
))
423 send_local_master_announcement(subrec
, work
, servrec
);
424 send_host_announcement(subrec
, work
, servrec
);
426 if ((announce_interval
<= 0) || (lm_announce
<= 0)) {
427 /* user absolutely does not want LM announcements to be sent. */
431 if ((lm_announce
>= 2) && (!found_lm_clients
)) {
432 /* has been set to 2 (Auto) but no LM clients detected (yet). */
437 * lm announce was set or we have seen lm announcements, so do
438 * a lm announcement of host removed.
441 send_lm_host_announcement(subrec
, work
, servrec
, 0);
447 /****************************************************************************
448 Do all the "remote" announcements. These are used to put ourselves
449 on a remote browse list. They are done blind, no checking is done to
450 see if there is actually a local master browser at the other end.
451 **************************************************************************/
453 void announce_remote(time_t t
)
457 static time_t last_time
= 0;
461 int stype
= lp_default_server_announce();
463 if (last_time
&& (t
< (last_time
+ REMOTE_ANNOUNCE_INTERVAL
)))
468 s
= lp_remote_announce();
472 comment
= string_truncate(lp_serverstring(), MAX_SERVER_STRING_LENGTH
);
474 for (ptr
=s
; next_token(&ptr
,s2
,NULL
,sizeof(s2
)); ) {
475 /* The entries are of the form a.b.c.d/WORKGROUP with
476 WORKGROUP being optional */
481 pwgroup
= strchr_m(s2
,'/');
484 if (!pwgroup
|| !*pwgroup
)
485 wgroup
= lp_workgroup();
489 addr
= *interpret_addr2(s2
);
491 /* Announce all our names including aliases */
492 /* Give the ip address as the address of our first
495 for(i
=0; my_netbios_names(i
); i
++) {
496 const char *name
= my_netbios_names(i
);
498 DEBUG(5,("announce_remote: Doing remote announce for server %s to IP %s.\n",
499 name
, inet_ntoa(addr
) ));
501 send_announcement(FIRST_SUBNET
, ANN_HostAnnouncement
,
502 name
, /* From nbt name. */
503 wgroup
, 0x1d, /* To nbt name. */
505 REMOTE_ANNOUNCE_INTERVAL
, /* Time until next announce. */
506 name
, /* Name to announce. */
507 stype
, /* Type field. */
513 /****************************************************************************
514 Implement the 'remote browse sync' feature Andrew added.
515 These are used to put our browse lists into remote browse lists.
516 **************************************************************************/
518 void browse_sync_remote(time_t t
)
522 static time_t last_time
= 0;
525 struct work_record
*work
;
530 if (last_time
&& (t
< (last_time
+ REMOTE_ANNOUNCE_INTERVAL
)))
535 s
= lp_remote_browse_sync();
540 * We only do this if we are the local master browser
541 * for our workgroup on the firsst subnet.
544 if((work
= find_workgroup_on_subnet(FIRST_SUBNET
, lp_workgroup())) == NULL
) {
545 DEBUG(0,("browse_sync_remote: Cannot find workgroup %s on subnet %s\n",
546 lp_workgroup(), FIRST_SUBNET
->subnet_name
));
550 if(!AM_LOCAL_MASTER_BROWSER(work
)) {
551 DEBUG(5,("browse_sync_remote: We can only do this if we are a local master browser \
552 for workgroup %s on subnet %s.\n", lp_workgroup(), FIRST_SUBNET
->subnet_name
));
556 memset(outbuf
,'\0',sizeof(outbuf
));
558 SCVAL(p
,0,ANN_MasterAnnouncement
);
561 unstrcpy(myname
, global_myname());
564 push_pstring_base(p
, myname
, outbuf
);
566 p
= skip_string(p
,1);
568 for (ptr
=s
; next_token(&ptr
,s2
,NULL
,sizeof(s2
)); ) {
569 /* The entries are of the form a.b.c.d */
570 addr
= *interpret_addr2(s2
);
572 DEBUG(5,("announce_remote: Doing remote browse sync announce for server %s to IP %s.\n",
573 global_myname(), inet_ntoa(addr
) ));
575 send_mailslot(True
, BROWSE_MAILSLOT
, outbuf
,PTR_DIFF(p
,outbuf
),
576 global_myname(), 0x0, "*", 0x0, addr
, FIRST_SUBNET
->myip
, DGRAM_PORT
);