source: branches/samba-3.5.x/source3/nmbd/nmbd_workgroupdb.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 10.6 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) Luke Kenneth Casson Leighton 1994-1998
6 Copyright (C) Jeremy Allison 1994-1998
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
25extern uint16 samba_nb_type;
26
27int workgroup_count = 0; /* unique index key: one for each workgroup */
28
29/****************************************************************************
30 Add a workgroup into the list.
31**************************************************************************/
32
33static void add_workgroup(struct subnet_record *subrec, struct work_record *work)
34{
35 work->subnet = subrec;
36 DLIST_ADD(subrec->workgrouplist, work);
37 subrec->work_changed = True;
38}
39
40/****************************************************************************
41 Copy name to unstring. Used by create_workgroup() and find_workgroup_on_subnet().
42**************************************************************************/
43
44static void name_to_unstring(unstring unname, const char *name)
45{
46 nstring nname;
47
48 errno = 0;
49 push_ascii_nstring(nname, name);
50 if (errno == E2BIG) {
51 unstring tname;
52 pull_ascii_nstring(tname, sizeof(tname), nname);
53 unstrcpy(unname, tname);
54 DEBUG(0,("name_to_nstring: workgroup name %s is too long. Truncating to %s\n",
55 name, tname));
56 } else {
57 unstrcpy(unname, name);
58 }
59}
60
61/****************************************************************************
62 Create an empty workgroup.
63**************************************************************************/
64
65static struct work_record *create_workgroup(const char *name, int ttl)
66{
67 struct work_record *work;
68 struct subnet_record *subrec;
69 int t = -1;
70
71 if((work = SMB_MALLOC_P(struct work_record)) == NULL) {
72 DEBUG(0,("create_workgroup: malloc fail !\n"));
73 return NULL;
74 }
75 memset((char *)work, '\0', sizeof(*work));
76
77 name_to_unstring(work->work_group, name);
78
79 work->serverlist = NULL;
80
81 work->RunningElection = False;
82 work->ElectionCount = 0;
83 work->announce_interval = 0;
84 work->needelection = False;
85 work->needannounce = True;
86 work->lastannounce_time = time(NULL);
87 work->mst_state = lp_local_master() ? MST_POTENTIAL : MST_NONE;
88 work->dom_state = DOMAIN_NONE;
89 work->log_state = LOGON_NONE;
90
91 work->death_time = (ttl != PERMANENT_TTL) ? time(NULL)+(ttl*3) : PERMANENT_TTL;
92
93 /* Make sure all token representations of workgroups are unique. */
94
95 for (subrec = FIRST_SUBNET; subrec && (t == -1); subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
96 struct work_record *w;
97 for (w = subrec->workgrouplist; w && t == -1; w = w->next) {
98 if (strequal(w->work_group, work->work_group))
99 t = w->token;
100 }
101 }
102
103 if (t == -1)
104 work->token = ++workgroup_count;
105 else
106 work->token = t;
107
108 /* No known local master browser as yet. */
109 *work->local_master_browser_name = '\0';
110
111 /* No known domain master browser as yet. */
112 *work->dmb_name.name = '\0';
113 zero_ip_v4(&work->dmb_addr);
114
115 /* WfWg uses 01040b01 */
116 /* Win95 uses 01041501 */
117 /* NTAS uses ???????? */
118 work->ElectionCriterion = (MAINTAIN_LIST)|(BROWSER_ELECTION_VERSION<<8);
119 work->ElectionCriterion |= (lp_os_level() << 24);
120 if (lp_domain_master())
121 work->ElectionCriterion |= 0x80;
122
123 return work;
124}
125
126/*******************************************************************
127 Remove a workgroup.
128******************************************************************/
129
130static struct work_record *remove_workgroup_from_subnet(struct subnet_record *subrec,
131 struct work_record *work)
132{
133 struct work_record *ret_work = NULL;
134
135 DEBUG(3,("remove_workgroup: Removing workgroup %s\n", work->work_group));
136
137 ret_work = work->next;
138
139 remove_all_servers(work);
140
141 if (!work->serverlist) {
142 if (work->prev)
143 work->prev->next = work->next;
144 if (work->next)
145 work->next->prev = work->prev;
146
147 if (subrec->workgrouplist == work)
148 subrec->workgrouplist = work->next;
149
150 ZERO_STRUCTP(work);
151 SAFE_FREE(work);
152 }
153
154 subrec->work_changed = True;
155
156 return ret_work;
157}
158
159/****************************************************************************
160 Find a workgroup in the workgroup list of a subnet.
161**************************************************************************/
162
163struct work_record *find_workgroup_on_subnet(struct subnet_record *subrec,
164 const char *name)
165{
166 struct work_record *ret;
167 unstring un_name;
168
169 DEBUG(4, ("find_workgroup_on_subnet: workgroup search for %s on subnet %s: ",
170 name, subrec->subnet_name));
171
172 name_to_unstring(un_name, name);
173
174 for (ret = subrec->workgrouplist; ret; ret = ret->next) {
175 if (strequal(ret->work_group,un_name)) {
176 DEBUGADD(4, ("found.\n"));
177 return(ret);
178 }
179 }
180 DEBUGADD(4, ("not found.\n"));
181 return NULL;
182}
183
184/****************************************************************************
185 Create a workgroup in the workgroup list of the subnet.
186**************************************************************************/
187
188struct work_record *create_workgroup_on_subnet(struct subnet_record *subrec,
189 const char *name, int ttl)
190{
191 struct work_record *work = NULL;
192
193 DEBUG(4,("create_workgroup_on_subnet: creating group %s on subnet %s\n",
194 name, subrec->subnet_name));
195
196 if ((work = create_workgroup(name, ttl))) {
197 add_workgroup(subrec, work);
198 subrec->work_changed = True;
199 return(work);
200 }
201
202 return NULL;
203}
204
205/****************************************************************************
206 Update a workgroup ttl.
207**************************************************************************/
208
209void update_workgroup_ttl(struct work_record *work, int ttl)
210{
211 if(work->death_time != PERMANENT_TTL)
212 work->death_time = time(NULL)+(ttl*3);
213 work->subnet->work_changed = True;
214}
215
216/****************************************************************************
217 Fail function called if we cannot register the WORKGROUP<0> and
218 WORKGROUP<1e> names on the net.
219**************************************************************************/
220
221static void fail_register(struct subnet_record *subrec, struct response_record *rrec,
222 struct nmb_name *nmbname)
223{
224 DEBUG(0,("fail_register: Failed to register name %s on subnet %s.\n",
225 nmb_namestr(nmbname), subrec->subnet_name));
226}
227
228/****************************************************************************
229 If the workgroup is our primary workgroup, add the required names to it.
230**************************************************************************/
231
232void initiate_myworkgroup_startup(struct subnet_record *subrec, struct work_record *work)
233{
234 int i;
235
236 if(!strequal(lp_workgroup(), work->work_group))
237 return;
238
239 /* If this is a broadcast subnet then start elections on it if we are so configured. */
240
241 if ((subrec != unicast_subnet) && (subrec != remote_broadcast_subnet) &&
242 (subrec != wins_server_subnet) && lp_preferred_master() && lp_local_master()) {
243 DEBUG(3, ("initiate_myworkgroup_startup: preferred master startup for \
244workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
245 work->needelection = True;
246 work->ElectionCriterion |= (1<<3);
247 }
248
249 /* Register the WORKGROUP<0> and WORKGROUP<1e> names on the network. */
250
251 register_name(subrec,lp_workgroup(),0x0,samba_nb_type|NB_GROUP, NULL, fail_register,NULL);
252 register_name(subrec,lp_workgroup(),0x1e,samba_nb_type|NB_GROUP, NULL, fail_register,NULL);
253
254 for( i = 0; my_netbios_names(i); i++) {
255 const char *name = my_netbios_names(i);
256 int stype = lp_default_server_announce() | (lp_local_master() ? SV_TYPE_POTENTIAL_BROWSER : 0 );
257
258 if(!strequal(global_myname(), name))
259 stype &= ~(SV_TYPE_MASTER_BROWSER|SV_TYPE_POTENTIAL_BROWSER|SV_TYPE_DOMAIN_MASTER|SV_TYPE_DOMAIN_MEMBER);
260
261 create_server_on_workgroup(work,name,stype|SV_TYPE_LOCAL_LIST_ONLY, PERMANENT_TTL,
262 string_truncate(lp_serverstring(), MAX_SERVER_STRING_LENGTH));
263 DEBUG(3,("initiate_myworkgroup_startup: Added server name entry %s \
264on subnet %s\n", name, subrec->subnet_name));
265 }
266}
267
268/****************************************************************************
269 Dump a copy of the workgroup database into the log file.
270 **************************************************************************/
271
272void dump_workgroups(bool force_write)
273{
274 struct subnet_record *subrec;
275 int debuglevel = force_write ? 0 : 4;
276
277 for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
278 if (subrec->workgrouplist) {
279 struct work_record *work;
280
281 if( DEBUGLVL( debuglevel ) ) {
282 dbgtext( "dump_workgroups()\n " );
283 dbgtext( "dump workgroup on subnet %15s: ", subrec->subnet_name );
284 dbgtext( "netmask=%15s:\n", inet_ntoa(subrec->mask_ip) );
285 }
286
287 for (work = subrec->workgrouplist; work; work = work->next) {
288 DEBUGADD( debuglevel, ( "\t%s(%d) current master browser = %s\n", work->work_group,
289 work->token, *work->local_master_browser_name ? work->local_master_browser_name : "UNKNOWN" ) );
290 if (work->serverlist) {
291 struct server_record *servrec;
292 for (servrec = work->serverlist; servrec; servrec = servrec->next) {
293 DEBUGADD( debuglevel, ( "\t\t%s %8x (%s)\n",
294 servrec->serv.name,
295 servrec->serv.type,
296 servrec->serv.comment ) );
297 }
298 }
299 }
300 }
301 }
302}
303
304/****************************************************************************
305 Expire any dead servers on all workgroups. If the workgroup has expired
306 remove it.
307 **************************************************************************/
308
309void expire_workgroups_and_servers(time_t t)
310{
311 struct subnet_record *subrec;
312
313 for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
314 struct work_record *work;
315 struct work_record *nextwork;
316
317 for (work = subrec->workgrouplist; work; work = nextwork) {
318 nextwork = work->next;
319 expire_servers(work, t);
320
321 if ((work->serverlist == NULL) && (work->death_time != PERMANENT_TTL) &&
322 ((t == (time_t)-1) || (work->death_time < t))) {
323 DEBUG(3,("expire_workgroups_and_servers: Removing timed out workgroup %s\n",
324 work->work_group));
325 remove_workgroup_from_subnet(subrec, work);
326 }
327 }
328 }
329}
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