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/>.
22 /* this file handles asynchronous browse synchronisation requests. The
23 requests are done by forking and putting the result in a file in the
24 locks directory. We do it this way because we don't want nmbd to be
25 blocked waiting for some server to respond on a TCP connection. This
26 also allows us to have more than 1 sync going at once (tridge) */
29 #include "system/filesys.h"
30 #include "../librpc/gen_ndr/svcctl.h"
31 #include "nmbd/nmbd.h"
32 #include "libsmb/libsmb.h"
33 #include "libsmb/clirap.h"
34 #include "../libcli/smb/smbXcli_base.h"
37 struct sync_record *next, *prev;
45 /* a linked list of current sync connections */
46 static struct sync_record *syncs;
50 /*******************************************************************
51 This is the NetServerEnum callback.
52 Note sname and comment are in UNIX codepage format.
53 ******************************************************************/
55 static void callback(const char *sname, uint32_t stype,
56 const char *comment, void *state)
58 x_fprintf(fp,"\"%s\" %08X \"%s\"\n", sname, stype, comment);
61 /*******************************************************************
62 Synchronise browse lists with another browse server.
63 Log in on the remote server's SMB port to their IPC$ service,
64 do a NetServerEnum and record the results in fname
65 ******************************************************************/
67 static void sync_child(char *name, int nm_type,
69 struct in_addr ip, bool local, bool servers,
72 fstring unix_workgroup;
73 struct cli_state *cli;
74 uint32_t local_type = local ? SV_TYPE_LOCAL_LIST_ONLY : 0;
75 struct sockaddr_storage ss;
78 /* W2K DMB's return empty browse lists on port 445. Use 139.
79 * Patch from Andy Levine andyl@epicrealm.com.
82 in_addr_to_sockaddr_storage(&ss, ip);
84 status = cli_connect_nb(name, &ss, NBT_SMB_PORT, nm_type,
85 get_local_machine_name(), SMB_SIGNING_DEFAULT,
87 if (!NT_STATUS_IS_OK(status)) {
91 status = smbXcli_negprot(cli->conn, cli->timeout, PROTOCOL_CORE,
93 if (!NT_STATUS_IS_OK(status)) {
98 if (!NT_STATUS_IS_OK(cli_session_setup(cli, "", "", 1, "", 0,
104 if (!NT_STATUS_IS_OK(cli_tree_connect(cli, "IPC$", "IPC", "", 1))) {
109 /* All the cli_XX functions take UNIX character set. */
110 fstrcpy(unix_workgroup, cli->server_domain ? cli->server_domain : workgroup);
112 /* Fetch a workgroup list. */
113 cli_NetServerEnum(cli, unix_workgroup,
114 local_type|SV_TYPE_DOMAIN_ENUM,
117 /* Now fetch a server list. */
119 fstrcpy(unix_workgroup, workgroup);
120 cli_NetServerEnum(cli, unix_workgroup,
121 local?SV_TYPE_LOCAL_LIST_ONLY:SV_TYPE_ALL,
128 /*******************************************************************
129 initialise a browse sync with another browse server. Log in on the
130 remote server's SMB port to their IPC$ service, do a NetServerEnum
131 and record the results
132 ******************************************************************/
134 void sync_browse_lists(struct work_record *work,
135 char *name, int nm_type,
136 struct in_addr ip, bool local, bool servers)
138 struct sync_record *s;
141 /* Check we're not trying to sync with ourselves. This can
142 happen if we are a domain *and* a local master browser. */
148 s = SMB_MALLOC_P(struct sync_record);
153 unstrcpy(s->workgroup, work->work_group);
154 unstrcpy(s->server, name);
157 if (asprintf(&s->fname, "%s/sync.%d", lp_lock_directory(), counter++) < 0) {
161 /* Safe to use as 0 means no size change. */
162 all_string_sub(s->fname,"//", "/", 0);
166 /* the parent forks and returns, leaving the child to do the
169 if ((s->pid = fork())) return;
171 BlockSignals( False, SIGTERM );
173 DEBUG(2,("Initiating browse sync for %s to %s(%s)\n",
174 work->work_group, name, inet_ntoa(ip)));
176 fp = x_fopen(s->fname,O_WRONLY|O_CREAT|O_TRUNC, 0644);
181 sync_child(name, nm_type, work->work_group, ip, local, servers,
188 /**********************************************************************
189 Handle one line from a completed sync file.
190 **********************************************************************/
192 static void complete_one(struct sync_record *s,
193 char *sname, uint32_t stype, char *comment)
195 struct work_record *work;
196 struct server_record *servrec;
198 stype &= ~SV_TYPE_LOCAL_LIST_ONLY;
200 if (stype & SV_TYPE_DOMAIN_ENUM) {
201 /* See if we can find the workgroup on this subnet. */
202 if((work=find_workgroup_on_subnet(unicast_subnet, sname))) {
203 /* We already know about this workgroup -
205 update_workgroup_ttl(work,lp_max_ttl());
207 /* Create the workgroup on the subnet. */
208 work = create_workgroup_on_subnet(unicast_subnet,
209 sname, lp_max_ttl());
211 /* remember who the master is */
212 unstrcpy(work->local_master_browser_name, comment);
218 work = find_workgroup_on_subnet(unicast_subnet, s->workgroup);
220 DEBUG(3,("workgroup %s doesn't exist on unicast subnet?\n",
225 if ((servrec = find_server_in_workgroup( work, sname))) {
226 /* Check that this is not a locally known
227 server - if so ignore the entry. */
228 if(!(servrec->serv.type & SV_TYPE_LOCAL_LIST_ONLY)) {
229 /* We already know about this server - update
231 update_server_ttl(servrec, lp_max_ttl());
232 /* Update the type. */
233 servrec->serv.type = stype;
238 /* Create the server in the workgroup. */
239 create_server_on_workgroup(work, sname,stype, lp_max_ttl(), comment);
242 /**********************************************************************
243 Read the completed sync info.
244 **********************************************************************/
246 static void complete_sync(struct sync_record *s)
257 f = x_fopen(s->fname,O_RDONLY, 0);
263 TALLOC_CTX *frame = NULL;
265 if (!fgets_slash(line,sizeof(line),f))
270 frame = talloc_stackframe();
271 if (!next_token_talloc(frame,&ptr,&server,NULL) ||
272 !next_token_talloc(frame,&ptr,&type_str,NULL) ||
273 !next_token_talloc(frame,&ptr,&comment,NULL)) {
278 sscanf(type_str, "%X", &type);
280 complete_one(s, server, type, comment);
289 DEBUG(2,("sync with %s(%s) for workgroup %s completed (%d records)\n",
290 s->server, inet_ntoa(s->ip), s->workgroup, count));
293 /**********************************************************************
294 Check for completion of any of the child processes.
295 **********************************************************************/
297 void sync_check_completion(void)
299 struct sync_record *s, *next;
301 for (s=syncs;s;s=next) {
303 if (!process_exists_by_pid(s->pid)) {
304 /* it has completed - grab the info */
306 DLIST_REMOVE(syncs, s);