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
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.
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.
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/>.
24 #include "../librpc/gen_ndr/svcctl.h"
28 /*******************************************************************
29 Remove all the servers in a work group.
30 ******************************************************************/
32 void remove_all_servers(struct work_record
*work
)
34 struct server_record
*servrec
;
35 struct server_record
*nexts
;
37 for (servrec
= work
->serverlist
; servrec
; servrec
= nexts
) {
38 DEBUG(7,("remove_all_servers: Removing server %s\n",servrec
->serv
.name
));
39 nexts
= servrec
->next
;
40 DLIST_REMOVE(work
->serverlist
, servrec
);
41 ZERO_STRUCTP(servrec
);
45 work
->subnet
->work_changed
= True
;
48 /***************************************************************************
49 Add a server into the a workgroup serverlist.
50 **************************************************************************/
52 static void add_server_to_workgroup(struct work_record
*work
,
53 struct server_record
*servrec
)
55 DLIST_ADD_END(work
->serverlist
, servrec
, struct server_record
*);
56 work
->subnet
->work_changed
= True
;
59 /****************************************************************************
60 Find a server in a server list.
61 **************************************************************************/
63 struct server_record
*find_server_in_workgroup(struct work_record
*work
, const char *name
)
65 struct server_record
*ret
;
67 for (ret
= work
->serverlist
; ret
; ret
= ret
->next
) {
68 if (strequal(ret
->serv
.name
,name
))
75 /****************************************************************************
76 Remove a server entry from this workgroup.
77 ****************************************************************************/
79 void remove_server_from_workgroup(struct work_record
*work
, struct server_record
*servrec
)
81 DLIST_REMOVE(work
->serverlist
, servrec
);
82 ZERO_STRUCTP(servrec
);
84 work
->subnet
->work_changed
= True
;
87 /****************************************************************************
88 Create a server entry on this workgroup.
89 ****************************************************************************/
91 struct server_record
*create_server_on_workgroup(struct work_record
*work
,
92 const char *name
,int servertype
,
93 int ttl
, const char *comment
)
95 struct server_record
*servrec
;
98 DEBUG(7,("create_server_on_workgroup: not adding name starting with '*' (%s)\n",
103 if(find_server_in_workgroup(work
, name
) != NULL
) {
104 DEBUG(0,("create_server_on_workgroup: Server %s already exists on \
105 workgroup %s. This is a bug.\n", name
, work
->work_group
));
109 if((servrec
= SMB_MALLOC_P(struct server_record
)) == NULL
) {
110 DEBUG(0,("create_server_entry_on_workgroup: malloc fail !\n"));
114 memset((char *)servrec
,'\0',sizeof(*servrec
));
116 servrec
->subnet
= work
->subnet
;
118 fstrcpy(servrec
->serv
.name
,name
);
119 fstrcpy(servrec
->serv
.comment
,comment
);
120 strupper_m(servrec
->serv
.name
);
121 servrec
->serv
.type
= servertype
;
123 update_server_ttl(servrec
, ttl
);
125 add_server_to_workgroup(work
, servrec
);
127 DEBUG(3,("create_server_on_workgroup: Created server entry %s of type %x (%s) on \
128 workgroup %s.\n", name
,servertype
,comment
, work
->work_group
));
130 work
->subnet
->work_changed
= True
;
135 /*******************************************************************
136 Update the ttl field of a server record.
137 *******************************************************************/
139 void update_server_ttl(struct server_record
*servrec
, int ttl
)
141 if(ttl
> lp_max_ttl())
144 if(is_myname(servrec
->serv
.name
))
145 servrec
->death_time
= PERMANENT_TTL
;
147 servrec
->death_time
= (ttl
!= PERMANENT_TTL
) ? time(NULL
)+(ttl
*3) : PERMANENT_TTL
;
149 servrec
->subnet
->work_changed
= True
;
152 /*******************************************************************
153 Expire old servers in the serverlist. A time of -1 indicates
154 everybody dies except those with a death_time of PERMANENT_TTL (which is 0).
155 This should only be called from expire_workgroups_and_servers().
156 ******************************************************************/
158 void expire_servers(struct work_record
*work
, time_t t
)
160 struct server_record
*servrec
;
161 struct server_record
*nexts
;
163 for (servrec
= work
->serverlist
; servrec
; servrec
= nexts
) {
164 nexts
= servrec
->next
;
166 if ((servrec
->death_time
!= PERMANENT_TTL
) && ((t
== -1) || (servrec
->death_time
< t
))) {
167 DEBUG(3,("expire_old_servers: Removing timed out server %s\n",servrec
->serv
.name
));
168 remove_server_from_workgroup(work
, servrec
);
169 work
->subnet
->work_changed
= True
;
174 /*******************************************************************
175 Decide if we should write out a server record for this server.
176 We return zero if we should not. Check if we've already written
177 out this server record from an earlier subnet.
178 ******************************************************************/
180 static uint32
write_this_server_name( struct subnet_record
*subrec
,
181 struct work_record
*work
,
182 struct server_record
*servrec
)
184 struct subnet_record
*ssub
;
185 struct work_record
*iwork
;
187 /* Go through all the subnets we have already seen. */
188 for (ssub
= FIRST_SUBNET
; ssub
&& (ssub
!= subrec
); ssub
= NEXT_SUBNET_INCLUDING_UNICAST(ssub
)) {
189 for(iwork
= ssub
->workgrouplist
; iwork
; iwork
= iwork
->next
) {
190 if(find_server_in_workgroup( iwork
, servrec
->serv
.name
) != NULL
) {
192 * We have already written out this server record, don't
193 * do it again. This gives precedence to servers we have seen
194 * on the broadcast subnets over servers that may have been
195 * added via a sync on the unicast_subet.
197 * The correct way to do this is to have a serverlist file
198 * per subnet - this means changes to smbd as well. I may
199 * add this at a later date (JRA).
207 return servrec
->serv
.type
;
210 /*******************************************************************
211 Decide if we should write out a workgroup record for this workgroup.
212 We return zero if we should not. Don't write out lp_workgroup() (we've
213 already done it) and also don't write out a second workgroup record
214 on the unicast subnet that we've already written out on one of the
216 ******************************************************************/
218 static uint32
write_this_workgroup_name( struct subnet_record
*subrec
,
219 struct work_record
*work
)
221 struct subnet_record
*ssub
;
223 if(strequal(lp_workgroup(), work
->work_group
))
226 /* This is a workgroup we have seen on a broadcast subnet. All
227 these have the same type. */
229 if(subrec
!= unicast_subnet
)
230 return (SV_TYPE_DOMAIN_ENUM
|SV_TYPE_NT
|SV_TYPE_LOCAL_LIST_ONLY
);
232 for(ssub
= FIRST_SUBNET
; ssub
; ssub
= NEXT_SUBNET_EXCLUDING_UNICAST(ssub
)) {
233 /* This is the unicast subnet so check if we've already written out
234 this subnet when we passed over the broadcast subnets. */
236 if(find_workgroup_on_subnet( ssub
, work
->work_group
) != NULL
)
240 /* All workgroups on the unicast subnet (except our own, which we
241 have already written out) cannot be local. */
243 return (SV_TYPE_DOMAIN_ENUM
|SV_TYPE_NT
);
246 /*******************************************************************
247 Write out the browse.dat file.
248 ******************************************************************/
250 void write_browse_list_entry(XFILE
*fp
, const char *name
, uint32 rec_type
,
251 const char *local_master_browser_name
, const char *description
)
255 slprintf(tmp
,sizeof(tmp
)-1, "\"%s\"", name
);
256 x_fprintf(fp
, "%-25s ", tmp
);
257 x_fprintf(fp
, "%08x ", rec_type
);
258 slprintf(tmp
, sizeof(tmp
)-1, "\"%s\" ", local_master_browser_name
);
259 x_fprintf(fp
, "%-30s", tmp
);
260 x_fprintf(fp
, "\"%s\"\n", description
);
263 void write_browse_list(time_t t
, bool force_write
)
265 struct subnet_record
*subrec
;
266 struct work_record
*work
;
267 struct server_record
*servrec
;
273 bool list_changed
= force_write
;
274 static time_t lasttime
= 0;
275 TALLOC_CTX
*ctx
= talloc_tos();
277 /* Always dump if we're being told to by a signal. */
278 if(force_write
== False
) {
281 if (t
- lasttime
< 5)
287 dump_workgroups(force_write
);
289 for (subrec
= FIRST_SUBNET
; subrec
; subrec
= NEXT_SUBNET_INCLUDING_UNICAST(subrec
)) {
290 if(subrec
->work_changed
) {
301 fname
= cache_path(SERVER_LIST
);
305 fnamenew
= talloc_asprintf(ctx
, "%s.",
311 fp
= x_fopen(fnamenew
,O_WRONLY
|O_CREAT
|O_TRUNC
, 0644);
314 DEBUG(0,("write_browse_list: Can't open file %s. Error was %s\n",
315 fnamenew
,strerror(errno
)));
320 * Write out a record for our workgroup. Use the record from the first
324 if((work
= find_workgroup_on_subnet(FIRST_SUBNET
, lp_workgroup())) == NULL
) {
325 DEBUG(0,("write_browse_list: Fatal error - cannot find my workgroup %s\n",
331 write_browse_list_entry(fp
, work
->work_group
,
332 SV_TYPE_DOMAIN_ENUM
|SV_TYPE_NT
|SV_TYPE_LOCAL_LIST_ONLY
,
333 work
->local_master_browser_name
, work
->work_group
);
336 * We need to do something special for our own names.
337 * This is due to the fact that we may be a local master browser on
338 * one of our broadcast subnets, and a domain master on the unicast
339 * subnet. We iterate over the subnets and only write out the name
343 for (i
=0; my_netbios_names(i
); i
++) {
345 for (subrec
= FIRST_SUBNET
; subrec
; subrec
= NEXT_SUBNET_INCLUDING_UNICAST(subrec
)) {
346 if((work
= find_workgroup_on_subnet( subrec
, lp_workgroup() )) == NULL
)
348 if((servrec
= find_server_in_workgroup( work
, my_netbios_names(i
))) == NULL
)
351 stype
|= servrec
->serv
.type
;
354 /* Output server details, plus what workgroup they're in. */
355 write_browse_list_entry(fp
, my_netbios_names(i
), stype
,
356 string_truncate(lp_serverstring(), MAX_SERVER_STRING_LENGTH
), lp_workgroup());
359 for (subrec
= FIRST_SUBNET
; subrec
; subrec
= NEXT_SUBNET_INCLUDING_UNICAST(subrec
)) {
360 subrec
->work_changed
= False
;
362 for (work
= subrec
->workgrouplist
; work
; work
= work
->next
) {
363 /* Write out a workgroup record for a workgroup. */
364 uint32 wg_type
= write_this_workgroup_name( subrec
, work
);
367 write_browse_list_entry(fp
, work
->work_group
, wg_type
,
368 work
->local_master_browser_name
,
372 /* Now write out any server records a workgroup may have. */
374 for (servrec
= work
->serverlist
; servrec
; servrec
= servrec
->next
) {
377 /* We have already written our names here. */
378 if(is_myname(servrec
->serv
.name
))
381 serv_type
= write_this_server_name(subrec
, work
, servrec
);
383 /* Output server details, plus what workgroup they're in. */
384 write_browse_list_entry(fp
, servrec
->serv
.name
, serv_type
,
385 servrec
->serv
.comment
, work
->work_group
);
393 chmod(fnamenew
,0644);
394 rename(fnamenew
,fname
);
395 DEBUG(3,("write_browse_list: Wrote browse list into file %s\n",fname
));