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.
25 /* this file handles asynchronous browse synchronisation requests. The
26 requests are done by forking and putting the result in a file in the
27 locks directory. We do it this way because we don't want nmbd to be
28 blocked waiting for some server to respond on a TCP connection. This
29 also allows us to have more than 1 sync going at once (tridge) */
34 extern int DEBUGLEVEL;
38 struct sync_record *next, *prev;
46 /* a linked list of current sync connections */
47 static struct sync_record *syncs;
51 /*******************************************************************
52 This is the NetServerEnum callback.
53 ******************************************************************/
54 static void callback(const char *sname, uint32 stype, const char *comment)
56 fprintf(fp,"\"%s\" %08X \"%s\"\n", sname, stype, comment);
60 /*******************************************************************
61 Synchronise browse lists with another browse server.
62 Log in on the remote server's SMB port to their IPC$ service,
63 do a NetServerEnum and record the results in fname
64 ******************************************************************/
65 static void sync_child(char *name, int nm_type,
67 struct in_addr ip, BOOL local, BOOL servers,
70 extern fstring local_machine;
71 static struct cli_state cli;
72 uint32 local_type = local ? SV_TYPE_LOCAL_LIST_ONLY : 0;
73 struct nmb_name called, calling;
75 if (!cli_initialise(&cli) || !cli_connect(&cli, name, &ip)) {
80 make_nmb_name(&calling, local_machine, 0x0 , scope);
81 make_nmb_name(&called , name , nm_type, scope);
83 if (!cli_session_request(&cli, &calling, &called))
90 if (!cli_negprot(&cli)) {
95 if (!cli_session_setup(&cli, "", "", 1, "", 0, workgroup)) {
100 if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
105 /* Fetch a workgroup list. */
106 cli_NetServerEnum(&cli, workgroup,
107 local_type|SV_TYPE_DOMAIN_ENUM,
110 /* Now fetch a server list. */
112 cli_NetServerEnum(&cli, workgroup,
113 local?SV_TYPE_LOCAL_LIST_ONLY:SV_TYPE_ALL,
121 /*******************************************************************
122 initialise a browse sync with another browse server. Log in on the
123 remote server's SMB port to their IPC$ service, do a NetServerEnum
124 and record the results
125 ******************************************************************/
126 void sync_browse_lists(struct work_record *work,
127 char *name, int nm_type,
128 struct in_addr ip, BOOL local, BOOL servers)
130 struct sync_record *s;
133 /* Check we're not trying to sync with ourselves. This can
134 happen if we are a domain *and* a local master browser. */
139 s = (struct sync_record *)malloc(sizeof(*s));
144 fstrcpy(s->workgroup, work->work_group);
145 fstrcpy(s->server, name);
148 slprintf(s->fname, sizeof(pstring)-1,
149 "%s/sync.%d", lp_lockdir(), counter++);
150 string_sub(s->fname,"//", "/");
154 /* the parent forks and returns, leaving the child to do the
157 if ((s->pid = fork())) return;
159 BlockSignals( False, SIGTERM );
161 DEBUG(2,("Initiating browse sync for %s to %s(%s)\n",
162 work->work_group, name, inet_ntoa(ip)));
164 fp = sys_fopen(s->fname,"w");
167 sync_child(name, nm_type, work->work_group, ip, local, servers,
174 /**********************************************************************
175 handle one line from a completed sync file
176 **********************************************************************/
177 static void complete_one(struct sync_record *s,
178 char *sname, uint32 stype, char *comment)
180 struct work_record *work;
181 struct server_record *servrec;
183 stype &= ~SV_TYPE_LOCAL_LIST_ONLY;
185 if (stype & SV_TYPE_DOMAIN_ENUM) {
186 /* See if we can find the workgroup on this subnet. */
187 if((work=find_workgroup_on_subnet(unicast_subnet, sname))) {
188 /* We already know about this workgroup -
190 update_workgroup_ttl(work,lp_max_ttl());
192 /* Create the workgroup on the subnet. */
193 work = create_workgroup_on_subnet(unicast_subnet,
194 sname, lp_max_ttl());
196 /* remember who the master is */
197 fstrcpy(work->local_master_browser_name,
204 work = find_workgroup_on_subnet(unicast_subnet, s->workgroup);
206 DEBUG(3,("workgroup %s doesn't exist on unicast subnet?\n",
211 if ((servrec = find_server_in_workgroup( work, sname))) {
212 /* Check that this is not a locally known
213 server - if so ignore the entry. */
214 if(!(servrec->serv.type & SV_TYPE_LOCAL_LIST_ONLY)) {
215 /* We already know about this server - update
217 update_server_ttl(servrec, lp_max_ttl());
218 /* Update the type. */
219 servrec->serv.type = stype;
224 /* Create the server in the workgroup. */
225 create_server_on_workgroup(work, sname,stype, lp_max_ttl(), comment);
229 /**********************************************************************
230 read the completed sync info
231 **********************************************************************/
232 static void complete_sync(struct sync_record *s)
235 fstring server, type_str;
242 f = sys_fopen(s->fname,"r");
248 if (!fgets_slash(line,sizeof(pstring),f)) continue;
252 if (!next_token(&ptr,server,NULL,sizeof(server)) ||
253 !next_token(&ptr,type_str,NULL, sizeof(type_str)) ||
254 !next_token(&ptr,comment,NULL, sizeof(comment))) {
258 sscanf(type_str, "%X", &type);
260 complete_one(s, server, type, comment);
269 DEBUG(2,("sync with %s(%s) for workgroup %s completed (%d records)\n",
270 s->server, inet_ntoa(s->ip), s->workgroup, count));
273 /**********************************************************************
274 check for completion of any of the child processes
275 **********************************************************************/
276 void sync_check_completion(void)
278 struct sync_record *s, *next;
280 for (s=syncs;s;s=next) {
282 if (!process_exists(s->pid)) {
283 /* it has completed - grab the info */
285 DLIST_REMOVE(syncs, s);