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.
30 extern int DEBUGLEVEL;
32 extern pstring global_myname;
33 extern fstring global_myworkgroup;
34 extern char **my_netbios_names;
35 extern uint16 samba_nb_type;
36 extern struct in_addr ipzero;
38 int workgroup_count = 0; /* unique index key: one for each workgroup */
40 /****************************************************************************
41 Add a workgroup into the list.
42 **************************************************************************/
44 static void add_workgroup(struct subnet_record *subrec, struct work_record *work)
46 struct work_record *w2;
48 work->subnet = subrec;
50 if (!subrec->workgrouplist)
52 subrec->workgrouplist = work;
58 for (w2 = subrec->workgrouplist; w2->next; w2 = w2->next)
65 subrec->work_changed = True;
68 /****************************************************************************
69 Create an empty workgroup.
70 **************************************************************************/
72 static struct work_record *create_workgroup(char *name, int ttl)
74 struct work_record *work;
75 struct subnet_record *subrec;
78 if((work = (struct work_record *)malloc(sizeof(*work))) == NULL)
80 DEBUG(0,("create_workgroup: malloc fail !\n"));
83 bzero((char *)work, sizeof(*work));
85 StrnCpy(work->work_group,name,sizeof(work->work_group)-1);
86 work->serverlist = NULL;
88 work->RunningElection = False;
89 work->ElectionCount = 0;
90 work->announce_interval = 0;
91 work->needelection = False;
92 work->needannounce = True;
93 work->lastannounce_time = time(NULL);
94 work->mst_state = lp_local_master() ? MST_POTENTIAL : MST_NONE;
95 work->dom_state = DOMAIN_NONE;
96 work->log_state = LOGON_NONE;
98 work->death_time = (ttl != PERMANENT_TTL) ? time(NULL)+(ttl*3) : PERMANENT_TTL;
100 /* Make sure all token representations of workgroups are unique. */
102 for (subrec = FIRST_SUBNET; subrec && (t == -1);
103 subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
105 struct work_record *w;
106 for (w = subrec->workgrouplist; w && t == -1; w = w->next)
108 if (strequal(w->work_group, work->work_group))
114 work->token = ++workgroup_count;
118 /* No known local master browser as yet. */
119 *work->local_master_browser_name = '\0';
121 /* No known domain master browser as yet. */
122 *work->dmb_name.name = '\0';
123 putip((char *)&work->dmb_addr, &ipzero);
125 /* WfWg uses 01040b01 */
126 /* Win95 uses 01041501 */
127 /* NTAS uses ???????? */
128 work->ElectionCriterion = (MAINTAIN_LIST)|(BROWSER_ELECTION_VERSION<<8);
129 work->ElectionCriterion |= (lp_os_level() << 24);
130 if (lp_domain_master())
131 work->ElectionCriterion |= 0x80;
136 /*******************************************************************
138 ******************************************************************/
140 static struct work_record *remove_workgroup_from_subnet(struct subnet_record *subrec,
141 struct work_record *work)
143 struct work_record *ret_work = NULL;
145 DEBUG(3,("remove_workgroup: Removing workgroup %s\n", work->work_group));
147 ret_work = work->next;
149 remove_all_servers(work);
151 if (!work->serverlist)
154 work->prev->next = work->next;
156 work->next->prev = work->prev;
158 if (subrec->workgrouplist == work)
159 subrec->workgrouplist = work->next;
165 subrec->work_changed = True;
171 /****************************************************************************
172 Find a workgroup in the workgroup list of a subnet.
173 **************************************************************************/
175 struct work_record *find_workgroup_on_subnet(struct subnet_record *subrec,
178 struct work_record *ret;
180 DEBUG(4, ("find_workgroup_on_subnet: workgroup search for %s on subnet %s: ",
181 name, subrec->subnet_name));
183 for (ret = subrec->workgrouplist; ret; ret = ret->next)
185 if (!strcmp(ret->work_group,name))
187 DEBUGADD(4, ("found.\n"));
191 DEBUGADD(4, ("not found.\n"));
195 /****************************************************************************
196 Create a workgroup in the workgroup list of the subnet.
197 **************************************************************************/
199 struct work_record *create_workgroup_on_subnet(struct subnet_record *subrec,
200 fstring name, int ttl)
202 struct work_record *work = NULL;
204 DEBUG(4,("create_workgroup_on_subnet: creating group %s on subnet %s\n",
205 name, subrec->subnet_name));
207 if ((work = create_workgroup(name, ttl)))
209 add_workgroup(subrec, work);
211 subrec->work_changed = True;
219 /****************************************************************************
220 Update a workgroup ttl.
221 **************************************************************************/
223 void update_workgroup_ttl(struct work_record *work, int ttl)
225 if(work->death_time != PERMANENT_TTL)
226 work->death_time = time(NULL)+(ttl*3);
227 work->subnet->work_changed = True;
230 /****************************************************************************
231 Fail function called if we cannot register the WORKGROUP<0> and
232 WORKGROUP<1e> names on the net.
233 **************************************************************************/
235 static void fail_register(struct subnet_record *subrec, struct response_record *rrec,
236 struct nmb_name *nmbname)
238 DEBUG(0,("fail_register: Failed to register name %s on subnet %s.\n",
239 namestr(nmbname), subrec->subnet_name));
242 /****************************************************************************
243 If the workgroup is our primary workgroup, add the required names to it.
244 **************************************************************************/
246 void initiate_myworkgroup_startup(struct subnet_record *subrec, struct work_record *work)
250 if(!strequal(global_myworkgroup, work->work_group))
253 /* If this is a broadcast subnet then start elections on it
254 if we are so configured. */
256 if ((subrec != unicast_subnet) && (subrec != remote_broadcast_subnet) &&
257 (subrec != wins_server_subnet) && lp_preferred_master() &&
260 DEBUG(3, ("initiate_myworkgroup_startup: preferred master startup for \
261 workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
262 work->needelection = True;
263 work->ElectionCriterion |= (1<<3);
266 /* Register the WORKGROUP<0> and WORKGROUP<1e> names on the network. */
268 register_name(subrec,global_myworkgroup,0x0,samba_nb_type|NB_GROUP,
272 register_name(subrec,global_myworkgroup,0x1e,samba_nb_type|NB_GROUP,
276 for( i = 0; my_netbios_names[i]; i++)
278 char *name = my_netbios_names[i];
279 int stype = lp_default_server_announce() | (lp_local_master() ?
280 SV_TYPE_POTENTIAL_BROWSER : 0 );
282 if(!strequal(global_myname, name))
283 stype &= ~(SV_TYPE_MASTER_BROWSER|SV_TYPE_POTENTIAL_BROWSER|
284 SV_TYPE_DOMAIN_MASTER|SV_TYPE_DOMAIN_MEMBER);
286 create_server_on_workgroup(work,name,stype|SV_TYPE_LOCAL_LIST_ONLY,
287 PERMANENT_TTL, lp_serverstring());
288 DEBUG(3,("initiate_myworkgroup_startup: Added server name entry %s \
289 on subnet %s\n", name, subrec->subnet_name));
293 /****************************************************************************
294 Dump a copy of the workgroup database into the log file.
295 **************************************************************************/
297 void dump_workgroups(BOOL force_write)
299 struct subnet_record *subrec;
300 int debuglevel = force_write ? 0 : 4;
302 for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
304 if (subrec->workgrouplist)
306 struct work_record *work;
308 if( DEBUGLVL( debuglevel ) )
310 dbgtext( "dump_workgroups()\n " );
311 dbgtext( "dump workgroup on subnet %15s: ", subrec->subnet_name );
312 dbgtext( "netmask=%15s:\n", inet_ntoa(subrec->mask_ip) );
315 for (work = subrec->workgrouplist; work; work = work->next)
317 DEBUGADD( debuglevel, ( "\t%s(%d) current master browser = %s\n",
320 *work->local_master_browser_name
321 ? work->local_master_browser_name : "UNKNOWN" ) );
322 if (work->serverlist)
324 struct server_record *servrec;
325 for (servrec = work->serverlist; servrec; servrec = servrec->next)
327 DEBUGADD( debuglevel, ( "\t\t%s %8x (%s)\n",
330 servrec->serv.comment ) );
338 /****************************************************************************
339 Expire any dead servers on all workgroups. If the workgroup has expired
341 **************************************************************************/
343 void expire_workgroups_and_servers(time_t t)
345 struct subnet_record *subrec;
347 for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec))
349 struct work_record *work;
350 struct work_record *nextwork;
352 for (work = subrec->workgrouplist; work; work = nextwork)
354 nextwork = work->next;
355 expire_servers(work, t);
357 if ((work->serverlist == NULL) && (work->death_time != PERMANENT_TTL) &&
358 ((t == -1) || (work->death_time < t)))
360 DEBUG(3,("expire_workgroups_and_servers: Removing timed out workgroup %s\n",
362 remove_workgroup_from_subnet(subrec, work);