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/>.
23 /* this file handles asynchronous browse synchronisation requests. The
24 requests are done by forking and putting the result in a file in the
25 locks directory. We do it this way because we don't want nmbd to be
26 blocked waiting for some server to respond on a TCP connection. This
27 also allows us to have more than 1 sync going at once (tridge) */
32 struct sync_record *next, *prev;
40 /* a linked list of current sync connections */
41 static struct sync_record *syncs;
45 /*******************************************************************
46 This is the NetServerEnum callback.
47 Note sname and comment are in UNIX codepage format.
48 ******************************************************************/
50 static void callback(const char *sname, uint32 stype,
51 const char *comment, void *state)
53 x_fprintf(fp,"\"%s\" %08X \"%s\"\n", sname, stype, comment);
56 /*******************************************************************
57 Synchronise browse lists with another browse server.
58 Log in on the remote server's SMB port to their IPC$ service,
59 do a NetServerEnum and record the results in fname
60 ******************************************************************/
62 static void sync_child(char *name, int nm_type,
64 struct in_addr ip, bool local, bool servers,
67 fstring unix_workgroup;
68 struct cli_state *cli;
69 uint32 local_type = local ? SV_TYPE_LOCAL_LIST_ONLY : 0;
70 struct nmb_name called, calling;
71 struct sockaddr_storage ss;
74 /* W2K DMB's return empty browse lists on port 445. Use 139.
75 * Patch from Andy Levine andyl@epicrealm.com.
78 cli = cli_initialise();
83 if (!cli_set_port(cli, 139)) {
87 in_addr_to_sockaddr_storage(&ss, ip);
88 status = cli_connect(cli, name, &ss);
89 if (!NT_STATUS_IS_OK(status)) {
93 make_nmb_name(&calling, get_local_machine_name(), 0x0);
94 make_nmb_name(&called , name, nm_type);
96 if (!cli_session_request(cli, &calling, &called)) {
101 if (!cli_negprot(cli)) {
106 if (!NT_STATUS_IS_OK(cli_session_setup(cli, "", "", 1, "", 0,
112 if (!cli_send_tconX(cli, "IPC$", "IPC", "", 1)) {
117 /* All the cli_XX functions take UNIX character set. */
118 fstrcpy(unix_workgroup, cli->server_domain ? cli->server_domain : workgroup);
120 /* Fetch a workgroup list. */
121 cli_NetServerEnum(cli, unix_workgroup,
122 local_type|SV_TYPE_DOMAIN_ENUM,
125 /* Now fetch a server list. */
127 fstrcpy(unix_workgroup, workgroup);
128 cli_NetServerEnum(cli, unix_workgroup,
129 local?SV_TYPE_LOCAL_LIST_ONLY:SV_TYPE_ALL,
136 /*******************************************************************
137 initialise a browse sync with another browse server. Log in on the
138 remote server's SMB port to their IPC$ service, do a NetServerEnum
139 and record the results
140 ******************************************************************/
142 void sync_browse_lists(struct work_record *work,
143 char *name, int nm_type,
144 struct in_addr ip, bool local, bool servers)
146 struct sync_record *s;
149 START_PROFILE(sync_browse_lists);
150 /* Check we're not trying to sync with ourselves. This can
151 happen if we are a domain *and* a local master browser. */
154 END_PROFILE(sync_browse_lists);
158 s = SMB_MALLOC_P(struct sync_record);
163 unstrcpy(s->workgroup, work->work_group);
164 unstrcpy(s->server, name);
167 if (asprintf(&s->fname, "%s/sync.%d", lp_lockdir(), counter++) < 0) {
171 /* Safe to use as 0 means no size change. */
172 all_string_sub(s->fname,"//", "/", 0);
176 /* the parent forks and returns, leaving the child to do the
177 actual sync and call END_PROFILE*/
179 if ((s->pid = sys_fork())) return;
181 BlockSignals( False, SIGTERM );
183 DEBUG(2,("Initiating browse sync for %s to %s(%s)\n",
184 work->work_group, name, inet_ntoa(ip)));
186 fp = x_fopen(s->fname,O_WRONLY|O_CREAT|O_TRUNC, 0644);
188 END_PROFILE(sync_browse_lists);
192 sync_child(name, nm_type, work->work_group, ip, local, servers,
196 END_PROFILE(sync_browse_lists);
200 /**********************************************************************
201 Handle one line from a completed sync file.
202 **********************************************************************/
204 static void complete_one(struct sync_record *s,
205 char *sname, uint32 stype, char *comment)
207 struct work_record *work;
208 struct server_record *servrec;
210 stype &= ~SV_TYPE_LOCAL_LIST_ONLY;
212 if (stype & SV_TYPE_DOMAIN_ENUM) {
213 /* See if we can find the workgroup on this subnet. */
214 if((work=find_workgroup_on_subnet(unicast_subnet, sname))) {
215 /* We already know about this workgroup -
217 update_workgroup_ttl(work,lp_max_ttl());
219 /* Create the workgroup on the subnet. */
220 work = create_workgroup_on_subnet(unicast_subnet,
221 sname, lp_max_ttl());
223 /* remember who the master is */
224 unstrcpy(work->local_master_browser_name, comment);
230 work = find_workgroup_on_subnet(unicast_subnet, s->workgroup);
232 DEBUG(3,("workgroup %s doesn't exist on unicast subnet?\n",
237 if ((servrec = find_server_in_workgroup( work, sname))) {
238 /* Check that this is not a locally known
239 server - if so ignore the entry. */
240 if(!(servrec->serv.type & SV_TYPE_LOCAL_LIST_ONLY)) {
241 /* We already know about this server - update
243 update_server_ttl(servrec, lp_max_ttl());
244 /* Update the type. */
245 servrec->serv.type = stype;
250 /* Create the server in the workgroup. */
251 create_server_on_workgroup(work, sname,stype, lp_max_ttl(), comment);
254 /**********************************************************************
255 Read the completed sync info.
256 **********************************************************************/
258 static void complete_sync(struct sync_record *s)
261 unstring server, type_str;
268 f = x_fopen(s->fname,O_RDONLY, 0);
275 if (!fgets_slash(line,sizeof(line),f))
280 if (!next_token(&ptr,server,NULL,sizeof(server)) ||
281 !next_token(&ptr,type_str,NULL, sizeof(type_str)) ||
282 !next_token(&ptr,comment,NULL, sizeof(comment))) {
286 sscanf(type_str, "%X", &type);
288 complete_one(s, server, type, comment);
297 DEBUG(2,("sync with %s(%s) for workgroup %s completed (%d records)\n",
298 s->server, inet_ntoa(s->ip), s->workgroup, count));
301 /**********************************************************************
302 Check for completion of any of the child processes.
303 **********************************************************************/
305 void sync_check_completion(void)
307 struct sync_record *s, *next;
309 for (s=syncs;s;s=next) {
311 if (!process_exists_by_pid(s->pid)) {
312 /* it has completed - grab the info */
314 DLIST_REMOVE(syncs, s);