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"
36 static struct ldb_context *wins_config_db_connect(TALLOC_CTX *mem_ctx,
37 struct loadparm_context *lp_ctx)
39 return ldb_wrap_connect(mem_ctx, lp_ctx, private_path(mem_ctx,
40 lp_ctx, lp_wins_config_url(lp_ctx)),
41 system_session(mem_ctx, lp_ctx), NULL, 0, NULL);
44 static uint64_t wins_config_db_get_seqnumber(struct ldb_context *ldb)
48 struct ldb_result *res = NULL;
49 TALLOC_CTX *tmp_ctx = talloc_new(ldb);
50 uint64_t seqnumber = 0;
52 dn = ldb_dn_new(tmp_ctx, ldb, "@BASEINFO");
55 /* find the record in the WINS database */
56 ret = ldb_search(ldb, dn, LDB_SCOPE_BASE,
58 if (ret != LDB_SUCCESS) goto failed;
59 talloc_steal(tmp_ctx, res);
60 if (res->count > 1) goto failed;
62 if (res->count == 1) {
63 seqnumber = ldb_msg_find_attr_as_uint64(res->msgs[0], "sequenceNumber", 0);
74 static NTSTATUS wreplsrv_open_winsdb(struct wreplsrv_service *service,
75 struct loadparm_context *lp_ctx)
77 service->wins_db = winsdb_connect(service, WINSDB_HANDLE_CALLER_WREPL);
78 if (!service->wins_db) {
79 return NT_STATUS_INTERNAL_DB_ERROR;
82 service->config.ldb = wins_config_db_connect(service, lp_ctx);
83 if (!service->config.ldb) {
84 return NT_STATUS_INTERNAL_DB_ERROR;
87 /* the default renew interval is 6 days */
88 service->config.renew_interval = lp_parm_int(lp_ctx, NULL,"wreplsrv","renew_interval", 6*24*60*60);
90 /* the default tombstone (extinction) interval is 6 days */
91 service->config.tombstone_interval= lp_parm_int(lp_ctx, NULL,"wreplsrv","tombstone_interval", 6*24*60*60);
93 /* the default tombstone (extinction) timeout is 1 day */
94 service->config.tombstone_timeout = lp_parm_int(lp_ctx, NULL,"wreplsrv","tombstone_timeout", 1*24*60*60);
96 /* the default tombstone extra timeout is 3 days */
97 service->config.tombstone_extra_timeout = lp_parm_int(lp_ctx, NULL,"wreplsrv","tombstone_extra_timeout", 3*24*60*60);
99 /* the default verify interval is 24 days */
100 service->config.verify_interval = lp_parm_int(lp_ctx, NULL,"wreplsrv","verify_interval", 24*24*60*60);
102 /* the default scavenging interval is 'renew_interval/2' */
103 service->config.scavenging_interval=lp_parm_int(lp_ctx, NULL,"wreplsrv","scavenging_interval",
104 service->config.renew_interval/2);
106 /* the maximun interval to the next periodic processing event */
107 service->config.periodic_interval = lp_parm_int(lp_ctx, NULL,"wreplsrv","periodic_interval", 15);
112 struct wreplsrv_partner *wreplsrv_find_partner(struct wreplsrv_service *service, const char *peer_addr)
114 struct wreplsrv_partner *cur;
116 for (cur = service->partners; cur; cur = cur->next) {
117 if (strcmp(cur->address, peer_addr) == 0) {
126 load our replication partners
128 NTSTATUS wreplsrv_load_partners(struct wreplsrv_service *service)
130 struct wreplsrv_partner *partner;
131 struct ldb_result *res = NULL;
135 uint64_t new_seqnumber;
137 new_seqnumber = wins_config_db_get_seqnumber(service->config.ldb);
139 /* if it's not the first run and nothing changed we're done */
140 if (service->config.seqnumber != 0 && service->config.seqnumber == new_seqnumber) {
144 tmp_ctx = talloc_new(service);
145 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
147 service->config.seqnumber = new_seqnumber;
149 /* find the record in the WINS database */
150 ret = ldb_search(service->config.ldb, ldb_dn_new(tmp_ctx, service->config.ldb, "CN=PARTNERS"), LDB_SCOPE_SUBTREE,
151 "(objectClass=wreplPartner)", NULL, &res);
152 if (ret != LDB_SUCCESS) goto failed;
153 talloc_steal(tmp_ctx, res);
155 /* first disable all existing partners */
156 for (partner=service->partners; partner; partner = partner->next) {
157 partner->type = WINSREPL_PARTNER_NONE;
160 for (i=0; i < res->count; i++) {
163 address = ldb_msg_find_attr_as_string(res->msgs[i], "address", NULL);
168 partner = wreplsrv_find_partner(service, address);
170 if (partner->name != partner->address) {
171 talloc_free(discard_const(partner->name));
173 partner->name = NULL;
174 talloc_free(discard_const(partner->our_address));
175 partner->our_address = NULL;
177 /* force rescheduling of pulling */
178 partner->pull.next_run = timeval_zero();
180 partner = talloc_zero(service, struct wreplsrv_partner);
181 if (partner == NULL) goto failed;
183 partner->service = service;
184 partner->address = address;
185 talloc_steal(partner, partner->address);
187 DLIST_ADD_END(service->partners, partner, struct wreplsrv_partner *);
190 partner->name = ldb_msg_find_attr_as_string(res->msgs[i], "name", partner->address);
191 talloc_steal(partner, partner->name);
192 partner->our_address = ldb_msg_find_attr_as_string(res->msgs[i], "ourAddress", NULL);
193 talloc_steal(partner, partner->our_address);
195 partner->type = ldb_msg_find_attr_as_uint(res->msgs[i], "type", WINSREPL_PARTNER_BOTH);
196 partner->pull.interval = ldb_msg_find_attr_as_uint(res->msgs[i], "pullInterval",
197 WINSREPL_DEFAULT_PULL_INTERVAL);
198 partner->pull.retry_interval = ldb_msg_find_attr_as_uint(res->msgs[i], "pullRetryInterval",
199 WINSREPL_DEFAULT_PULL_RETRY_INTERVAL);
200 partner->push.change_count = ldb_msg_find_attr_as_uint(res->msgs[i], "pushChangeCount",
201 WINSREPL_DEFAULT_PUSH_CHANGE_COUNT);
202 partner->push.use_inform = ldb_msg_find_attr_as_uint(res->msgs[i], "pushUseInform", false);
204 DEBUG(3,("wreplsrv_load_partners: found partner: %s type: 0x%X\n",
205 partner->address, partner->type));
208 DEBUG(2,("wreplsrv_load_partners: %u partners found: wins_config_db seqnumber %llu\n",
209 res->count, (unsigned long long)service->config.seqnumber));
211 talloc_free(tmp_ctx);
214 talloc_free(tmp_ctx);
215 return NT_STATUS_FOOBAR;
218 NTSTATUS wreplsrv_fill_wrepl_table(struct wreplsrv_service *service,
220 struct wrepl_table *table_out,
221 const char *initiator,
224 struct wreplsrv_owner *cur;
227 table_out->partner_count = 0;
228 table_out->partners = NULL;
229 table_out->initiator = initiator;
231 for (cur = service->table; cur; cur = cur->next) {
233 table_out->partner_count++;
237 if (strcmp(initiator, cur->owner.address) != 0) continue;
239 table_out->partner_count++;
243 table_out->partners = talloc_array(mem_ctx, struct wrepl_wins_owner, table_out->partner_count);
244 NT_STATUS_HAVE_NO_MEMORY(table_out->partners);
246 for (cur = service->table; cur && i < table_out->partner_count; cur = cur->next) {
248 * if it's our local entry
249 * update the max version
251 if (cur == service->owner) {
252 cur->owner.max_version = winsdb_get_maxVersion(service->wins_db);
256 table_out->partners[i] = cur->owner;
261 if (strcmp(initiator, cur->owner.address) != 0) continue;
263 table_out->partners[i] = cur->owner;
271 struct wreplsrv_owner *wreplsrv_find_owner(struct wreplsrv_service *service,
272 struct wreplsrv_owner *table,
273 const char *wins_owner)
275 struct wreplsrv_owner *cur;
277 for (cur = table; cur; cur = cur->next) {
278 if (strcmp(cur->owner.address, wins_owner) == 0) {
280 * if it's our local entry
281 * update the max version
283 if (cur == service->owner) {
284 cur->owner.max_version = winsdb_get_maxVersion(service->wins_db);
294 update the wins_owner_table max_version, if the given version is the highest version
295 if no entry for the wins_owner exists yet, create one
297 NTSTATUS wreplsrv_add_table(struct wreplsrv_service *service,
298 TALLOC_CTX *mem_ctx, struct wreplsrv_owner **_table,
299 const char *wins_owner, uint64_t version)
301 struct wreplsrv_owner *table = *_table;
302 struct wreplsrv_owner *cur;
304 if (!wins_owner || strcmp(wins_owner, "0.0.0.0") == 0) {
305 wins_owner = service->wins_db->local_owner;
308 cur = wreplsrv_find_owner(service, table, wins_owner);
310 /* if it doesn't exists yet, create one */
312 cur = talloc_zero(mem_ctx, struct wreplsrv_owner);
313 NT_STATUS_HAVE_NO_MEMORY(cur);
315 cur->owner.address = talloc_strdup(cur, wins_owner);
316 NT_STATUS_HAVE_NO_MEMORY(cur->owner.address);
317 cur->owner.min_version = 0;
318 cur->owner.max_version = 0;
319 cur->owner.type = 1; /* don't know why this is always 1 */
321 cur->partner = wreplsrv_find_partner(service, wins_owner);
323 DLIST_ADD_END(table, cur, struct wreplsrv_owner *);
327 /* the min_version is always 0 here, and won't be updated */
329 /* if the given version is higher than the current max_version, update */
330 if (cur->owner.max_version < version) {
331 cur->owner.max_version = version;
332 /* if it's for our local db, we need to update the wins.ldb too */
333 if (cur == service->owner) {
335 ret = winsdb_set_maxVersion(service->wins_db, cur->owner.max_version);
336 if (ret != cur->owner.max_version) {
337 DEBUG(0,("winsdb_set_maxVersion(%llu) failed: %llu\n",
338 (unsigned long long)cur->owner.max_version,
339 (unsigned long long)ret));
340 return NT_STATUS_INTERNAL_DB_CORRUPTION;
349 load the partner table
351 static NTSTATUS wreplsrv_load_table(struct wreplsrv_service *service)
353 struct ldb_result *res = NULL;
356 TALLOC_CTX *tmp_ctx = talloc_new(service);
357 struct ldb_context *ldb = service->wins_db->ldb;
359 struct wreplsrv_owner *local_owner;
360 const char *wins_owner;
362 const char * const attrs[] = {
369 * make sure we have our local entry in the list,
370 * but we set service->owner when we're done
371 * to avoid to many calls to wreplsrv_local_max_version()
373 status = wreplsrv_add_table(service,
374 service, &service->table,
375 service->wins_db->local_owner, 0);
376 if (!NT_STATUS_IS_OK(status)) goto failed;
377 local_owner = wreplsrv_find_owner(service, service->table, service->wins_db->local_owner);
379 status = NT_STATUS_INTERNAL_ERROR;
383 /* find the record in the WINS database */
384 ret = ldb_search(ldb, NULL, LDB_SCOPE_SUBTREE,
385 "(objectClass=winsRecord)", attrs, &res);
386 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
387 if (ret != LDB_SUCCESS) goto failed;
388 talloc_steal(tmp_ctx, res);
390 for (i=0; i < res->count; i++) {
391 wins_owner = ldb_msg_find_attr_as_string(res->msgs[i], "winsOwner", NULL);
392 version = ldb_msg_find_attr_as_uint64(res->msgs[i], "versionID", 0);
394 status = wreplsrv_add_table(service,
395 service, &service->table,
396 wins_owner, version);
397 if (!NT_STATUS_IS_OK(status)) goto failed;
398 talloc_free(res->msgs[i]);
402 * this makes sure we call wreplsrv_local_max_version() before returning in
403 * wreplsrv_find_owner()
405 service->owner = local_owner;
408 * this makes sure the maxVersion in the database is updated,
409 * with the highest version we found, if this is higher than the current stored one
411 status = wreplsrv_add_table(service,
412 service, &service->table,
413 service->wins_db->local_owner, local_owner->owner.max_version);
414 if (!NT_STATUS_IS_OK(status)) goto failed;
416 talloc_free(tmp_ctx);
419 talloc_free(tmp_ctx);
424 setup our replication partners
426 static NTSTATUS wreplsrv_setup_partners(struct wreplsrv_service *service)
430 status = wreplsrv_load_partners(service);
431 NT_STATUS_NOT_OK_RETURN(status);
433 status = wreplsrv_load_table(service);
434 NT_STATUS_NOT_OK_RETURN(status);
440 startup the wrepl task
442 static void wreplsrv_task_init(struct task_server *task)
445 struct wreplsrv_service *service;
447 task_server_set_title(task, "task[wreplsrv]");
449 service = talloc_zero(task, struct wreplsrv_service);
451 task_server_terminate(task, "wreplsrv_task_init: out of memory");
454 service->task = task;
455 service->startup_time = timeval_current();
456 task->private = service;
459 * setup up all partners, and open the winsdb
461 status = wreplsrv_open_winsdb(service, task->lp_ctx);
462 if (!NT_STATUS_IS_OK(status)) {
463 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_open_winsdb() failed");
468 * setup timed events for each partner we want to pull from
470 status = wreplsrv_setup_partners(service);
471 if (!NT_STATUS_IS_OK(status)) {
472 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_partners() failed");
477 * setup listen sockets, so we can anwser requests from our partners,
480 status = wreplsrv_setup_sockets(service, task->lp_ctx);
481 if (!NT_STATUS_IS_OK(status)) {
482 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_sockets() failed");
486 status = wreplsrv_setup_periodic(service);
487 if (!NT_STATUS_IS_OK(status)) {
488 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_periodic() failed");
492 irpc_add_name(task->msg_ctx, "wrepl_server");
496 initialise the WREPL server
498 static NTSTATUS wreplsrv_init(struct event_context *event_ctx, struct loadparm_context *lp_ctx, const struct model_ops *model_ops)
500 if (!lp_wins_support(lp_ctx)) {
504 return task_server_startup(event_ctx, model_ops, wreplsrv_task_init);
508 register ourselves as a available server
510 NTSTATUS server_service_wrepl_init(void)
512 return register_server_service("wrepl", wreplsrv_init);