2 Unix SMB/CIFS implementation.
4 WINS Replication server
6 Copyright (C) Stefan Metzmacher 2005
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 #include "lib/util/dlinklist.h"
24 #include "smbd/service_task.h"
25 #include "smbd/service.h"
26 #include "lib/messaging/irpc.h"
27 #include "librpc/gen_ndr/winsrepl.h"
28 #include "wrepl_server/wrepl_server.h"
29 #include "nbt_server/wins/winsdb.h"
30 #include "ldb/include/ldb.h"
31 #include "ldb/include/ldb_errors.h"
32 #include "auth/auth.h"
34 #include "param/param.h"
35 #include "lib/socket/netif.h"
37 static struct ldb_context *wins_config_db_connect(TALLOC_CTX *mem_ctx,
38 struct loadparm_context *lp_ctx)
40 return ldb_wrap_connect(mem_ctx, lp_ctx, private_path(mem_ctx,
41 lp_ctx, lp_wins_config_url(lp_ctx)),
42 system_session(mem_ctx, lp_ctx), NULL, 0, NULL);
45 static uint64_t wins_config_db_get_seqnumber(struct ldb_context *ldb)
49 struct ldb_result *res = NULL;
50 TALLOC_CTX *tmp_ctx = talloc_new(ldb);
51 uint64_t seqnumber = 0;
53 dn = ldb_dn_new(tmp_ctx, ldb, "@BASEINFO");
56 /* find the record in the WINS database */
57 ret = ldb_search(ldb, dn, LDB_SCOPE_BASE,
59 if (ret != LDB_SUCCESS) goto failed;
60 talloc_steal(tmp_ctx, res);
61 if (res->count > 1) goto failed;
63 if (res->count == 1) {
64 seqnumber = ldb_msg_find_attr_as_uint64(res->msgs[0], "sequenceNumber", 0);
75 static NTSTATUS wreplsrv_open_winsdb(struct wreplsrv_service *service,
76 struct loadparm_context *lp_ctx)
78 const char *owner = lp_parm_string(lp_ctx, NULL, "winsdb", "local_owner");
81 struct interface *ifaces;
82 load_interfaces(lp_interfaces(lp_ctx), &ifaces);
83 owner = iface_n_ip(ifaces, 0);
86 service->wins_db = winsdb_connect(service, lp_ctx, owner, WINSDB_HANDLE_CALLER_WREPL);
87 if (!service->wins_db) {
88 return NT_STATUS_INTERNAL_DB_ERROR;
91 service->config.ldb = wins_config_db_connect(service, lp_ctx);
92 if (!service->config.ldb) {
93 return NT_STATUS_INTERNAL_DB_ERROR;
96 /* the default renew interval is 6 days */
97 service->config.renew_interval = lp_parm_int(lp_ctx, NULL,"wreplsrv","renew_interval", 6*24*60*60);
99 /* the default tombstone (extinction) interval is 6 days */
100 service->config.tombstone_interval= lp_parm_int(lp_ctx, NULL,"wreplsrv","tombstone_interval", 6*24*60*60);
102 /* the default tombstone (extinction) timeout is 1 day */
103 service->config.tombstone_timeout = lp_parm_int(lp_ctx, NULL,"wreplsrv","tombstone_timeout", 1*24*60*60);
105 /* the default tombstone extra timeout is 3 days */
106 service->config.tombstone_extra_timeout = lp_parm_int(lp_ctx, NULL,"wreplsrv","tombstone_extra_timeout", 3*24*60*60);
108 /* the default verify interval is 24 days */
109 service->config.verify_interval = lp_parm_int(lp_ctx, NULL,"wreplsrv","verify_interval", 24*24*60*60);
111 /* the default scavenging interval is 'renew_interval/2' */
112 service->config.scavenging_interval=lp_parm_int(lp_ctx, NULL,"wreplsrv","scavenging_interval",
113 service->config.renew_interval/2);
115 /* the maximun interval to the next periodic processing event */
116 service->config.periodic_interval = lp_parm_int(lp_ctx, NULL,"wreplsrv","periodic_interval", 15);
121 struct wreplsrv_partner *wreplsrv_find_partner(struct wreplsrv_service *service, const char *peer_addr)
123 struct wreplsrv_partner *cur;
125 for (cur = service->partners; cur; cur = cur->next) {
126 if (strcmp(cur->address, peer_addr) == 0) {
135 load our replication partners
137 NTSTATUS wreplsrv_load_partners(struct wreplsrv_service *service)
139 struct wreplsrv_partner *partner;
140 struct ldb_result *res = NULL;
144 uint64_t new_seqnumber;
146 new_seqnumber = wins_config_db_get_seqnumber(service->config.ldb);
148 /* if it's not the first run and nothing changed we're done */
149 if (service->config.seqnumber != 0 && service->config.seqnumber == new_seqnumber) {
153 tmp_ctx = talloc_new(service);
154 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
156 service->config.seqnumber = new_seqnumber;
158 /* find the record in the WINS database */
159 ret = ldb_search(service->config.ldb, ldb_dn_new(tmp_ctx, service->config.ldb, "CN=PARTNERS"), LDB_SCOPE_SUBTREE,
160 "(objectClass=wreplPartner)", NULL, &res);
161 if (ret != LDB_SUCCESS) goto failed;
162 talloc_steal(tmp_ctx, res);
164 /* first disable all existing partners */
165 for (partner=service->partners; partner; partner = partner->next) {
166 partner->type = WINSREPL_PARTNER_NONE;
169 for (i=0; i < res->count; i++) {
172 address = ldb_msg_find_attr_as_string(res->msgs[i], "address", NULL);
177 partner = wreplsrv_find_partner(service, address);
179 if (partner->name != partner->address) {
180 talloc_free(discard_const(partner->name));
182 partner->name = NULL;
183 talloc_free(discard_const(partner->our_address));
184 partner->our_address = NULL;
186 /* force rescheduling of pulling */
187 partner->pull.next_run = timeval_zero();
189 partner = talloc_zero(service, struct wreplsrv_partner);
190 if (partner == NULL) goto failed;
192 partner->service = service;
193 partner->address = address;
194 talloc_steal(partner, partner->address);
196 DLIST_ADD_END(service->partners, partner, struct wreplsrv_partner *);
199 partner->name = ldb_msg_find_attr_as_string(res->msgs[i], "name", partner->address);
200 talloc_steal(partner, partner->name);
201 partner->our_address = ldb_msg_find_attr_as_string(res->msgs[i], "ourAddress", NULL);
202 talloc_steal(partner, partner->our_address);
204 partner->type = ldb_msg_find_attr_as_uint(res->msgs[i], "type", WINSREPL_PARTNER_BOTH);
205 partner->pull.interval = ldb_msg_find_attr_as_uint(res->msgs[i], "pullInterval",
206 WINSREPL_DEFAULT_PULL_INTERVAL);
207 partner->pull.retry_interval = ldb_msg_find_attr_as_uint(res->msgs[i], "pullRetryInterval",
208 WINSREPL_DEFAULT_PULL_RETRY_INTERVAL);
209 partner->push.change_count = ldb_msg_find_attr_as_uint(res->msgs[i], "pushChangeCount",
210 WINSREPL_DEFAULT_PUSH_CHANGE_COUNT);
211 partner->push.use_inform = ldb_msg_find_attr_as_uint(res->msgs[i], "pushUseInform", false);
213 DEBUG(3,("wreplsrv_load_partners: found partner: %s type: 0x%X\n",
214 partner->address, partner->type));
217 DEBUG(2,("wreplsrv_load_partners: %u partners found: wins_config_db seqnumber %llu\n",
218 res->count, (unsigned long long)service->config.seqnumber));
220 talloc_free(tmp_ctx);
223 talloc_free(tmp_ctx);
224 return NT_STATUS_FOOBAR;
227 NTSTATUS wreplsrv_fill_wrepl_table(struct wreplsrv_service *service,
229 struct wrepl_table *table_out,
230 const char *initiator,
233 struct wreplsrv_owner *cur;
236 table_out->partner_count = 0;
237 table_out->partners = NULL;
238 table_out->initiator = initiator;
240 for (cur = service->table; cur; cur = cur->next) {
242 table_out->partner_count++;
246 if (strcmp(initiator, cur->owner.address) != 0) continue;
248 table_out->partner_count++;
252 table_out->partners = talloc_array(mem_ctx, struct wrepl_wins_owner, table_out->partner_count);
253 NT_STATUS_HAVE_NO_MEMORY(table_out->partners);
255 for (cur = service->table; cur && i < table_out->partner_count; cur = cur->next) {
257 * if it's our local entry
258 * update the max version
260 if (cur == service->owner) {
261 cur->owner.max_version = winsdb_get_maxVersion(service->wins_db);
265 table_out->partners[i] = cur->owner;
270 if (strcmp(initiator, cur->owner.address) != 0) continue;
272 table_out->partners[i] = cur->owner;
280 struct wreplsrv_owner *wreplsrv_find_owner(struct wreplsrv_service *service,
281 struct wreplsrv_owner *table,
282 const char *wins_owner)
284 struct wreplsrv_owner *cur;
286 for (cur = table; cur; cur = cur->next) {
287 if (strcmp(cur->owner.address, wins_owner) == 0) {
289 * if it's our local entry
290 * update the max version
292 if (cur == service->owner) {
293 cur->owner.max_version = winsdb_get_maxVersion(service->wins_db);
303 update the wins_owner_table max_version, if the given version is the highest version
304 if no entry for the wins_owner exists yet, create one
306 NTSTATUS wreplsrv_add_table(struct wreplsrv_service *service,
307 TALLOC_CTX *mem_ctx, struct wreplsrv_owner **_table,
308 const char *wins_owner, uint64_t version)
310 struct wreplsrv_owner *table = *_table;
311 struct wreplsrv_owner *cur;
313 if (!wins_owner || strcmp(wins_owner, "0.0.0.0") == 0) {
314 wins_owner = service->wins_db->local_owner;
317 cur = wreplsrv_find_owner(service, table, wins_owner);
319 /* if it doesn't exists yet, create one */
321 cur = talloc_zero(mem_ctx, struct wreplsrv_owner);
322 NT_STATUS_HAVE_NO_MEMORY(cur);
324 cur->owner.address = talloc_strdup(cur, wins_owner);
325 NT_STATUS_HAVE_NO_MEMORY(cur->owner.address);
326 cur->owner.min_version = 0;
327 cur->owner.max_version = 0;
328 cur->owner.type = 1; /* don't know why this is always 1 */
330 cur->partner = wreplsrv_find_partner(service, wins_owner);
332 DLIST_ADD_END(table, cur, struct wreplsrv_owner *);
336 /* the min_version is always 0 here, and won't be updated */
338 /* if the given version is higher than the current max_version, update */
339 if (cur->owner.max_version < version) {
340 cur->owner.max_version = version;
341 /* if it's for our local db, we need to update the wins.ldb too */
342 if (cur == service->owner) {
344 ret = winsdb_set_maxVersion(service->wins_db, cur->owner.max_version);
345 if (ret != cur->owner.max_version) {
346 DEBUG(0,("winsdb_set_maxVersion(%llu) failed: %llu\n",
347 (unsigned long long)cur->owner.max_version,
348 (unsigned long long)ret));
349 return NT_STATUS_INTERNAL_DB_CORRUPTION;
358 load the partner table
360 static NTSTATUS wreplsrv_load_table(struct wreplsrv_service *service)
362 struct ldb_result *res = NULL;
365 TALLOC_CTX *tmp_ctx = talloc_new(service);
366 struct ldb_context *ldb = service->wins_db->ldb;
368 struct wreplsrv_owner *local_owner;
369 const char *wins_owner;
371 const char * const attrs[] = {
378 * make sure we have our local entry in the list,
379 * but we set service->owner when we're done
380 * to avoid to many calls to wreplsrv_local_max_version()
382 status = wreplsrv_add_table(service,
383 service, &service->table,
384 service->wins_db->local_owner, 0);
385 if (!NT_STATUS_IS_OK(status)) goto failed;
386 local_owner = wreplsrv_find_owner(service, service->table, service->wins_db->local_owner);
388 status = NT_STATUS_INTERNAL_ERROR;
392 /* find the record in the WINS database */
393 ret = ldb_search(ldb, NULL, LDB_SCOPE_SUBTREE,
394 "(objectClass=winsRecord)", attrs, &res);
395 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
396 if (ret != LDB_SUCCESS) goto failed;
397 talloc_steal(tmp_ctx, res);
399 for (i=0; i < res->count; i++) {
400 wins_owner = ldb_msg_find_attr_as_string(res->msgs[i], "winsOwner", NULL);
401 version = ldb_msg_find_attr_as_uint64(res->msgs[i], "versionID", 0);
403 status = wreplsrv_add_table(service,
404 service, &service->table,
405 wins_owner, version);
406 if (!NT_STATUS_IS_OK(status)) goto failed;
407 talloc_free(res->msgs[i]);
411 * this makes sure we call wreplsrv_local_max_version() before returning in
412 * wreplsrv_find_owner()
414 service->owner = local_owner;
417 * this makes sure the maxVersion in the database is updated,
418 * with the highest version we found, if this is higher than the current stored one
420 status = wreplsrv_add_table(service,
421 service, &service->table,
422 service->wins_db->local_owner, local_owner->owner.max_version);
423 if (!NT_STATUS_IS_OK(status)) goto failed;
425 talloc_free(tmp_ctx);
428 talloc_free(tmp_ctx);
433 setup our replication partners
435 static NTSTATUS wreplsrv_setup_partners(struct wreplsrv_service *service)
439 status = wreplsrv_load_partners(service);
440 NT_STATUS_NOT_OK_RETURN(status);
442 status = wreplsrv_load_table(service);
443 NT_STATUS_NOT_OK_RETURN(status);
449 startup the wrepl task
451 static void wreplsrv_task_init(struct task_server *task)
454 struct wreplsrv_service *service;
456 task_server_set_title(task, "task[wreplsrv]");
458 service = talloc_zero(task, struct wreplsrv_service);
460 task_server_terminate(task, "wreplsrv_task_init: out of memory");
463 service->task = task;
464 service->startup_time = timeval_current();
465 task->private = service;
468 * setup up all partners, and open the winsdb
470 status = wreplsrv_open_winsdb(service, task->lp_ctx);
471 if (!NT_STATUS_IS_OK(status)) {
472 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_open_winsdb() failed");
477 * setup timed events for each partner we want to pull from
479 status = wreplsrv_setup_partners(service);
480 if (!NT_STATUS_IS_OK(status)) {
481 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_partners() failed");
486 * setup listen sockets, so we can anwser requests from our partners,
489 status = wreplsrv_setup_sockets(service, task->lp_ctx);
490 if (!NT_STATUS_IS_OK(status)) {
491 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_sockets() failed");
495 status = wreplsrv_setup_periodic(service);
496 if (!NT_STATUS_IS_OK(status)) {
497 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_periodic() failed");
501 irpc_add_name(task->msg_ctx, "wrepl_server");
505 initialise the WREPL server
507 static NTSTATUS wreplsrv_init(struct event_context *event_ctx, struct loadparm_context *lp_ctx, const struct model_ops *model_ops)
509 if (!lp_wins_support(lp_ctx)) {
513 return task_server_startup(event_ctx, model_ops, wreplsrv_task_init);
517 register ourselves as a available server
519 NTSTATUS server_service_wrepl_init(void)
521 return register_server_service("wrepl", wreplsrv_init);