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 2 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, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "dlinklist.h"
25 #include "smbd/service_task.h"
26 #include "lib/messaging/irpc.h"
27 #include "librpc/gen_ndr/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 static struct ldb_context *wins_config_db_connect(TALLOC_CTX *mem_ctx)
36 return ldb_wrap_connect(mem_ctx, private_path(mem_ctx, lp_wins_config_url()),
37 system_session(mem_ctx), NULL, 0, NULL);
40 static uint64_t wins_config_db_get_seqnumber(struct ldb_context *ldb)
44 struct ldb_result *res = NULL;
45 TALLOC_CTX *tmp_ctx = talloc_new(ldb);
46 uint64_t seqnumber = 0;
48 dn = ldb_dn_explode(tmp_ctx, "@BASEINFO");
51 /* find the record in the WINS database */
52 ret = ldb_search(ldb, dn, LDB_SCOPE_BASE,
54 if (ret != LDB_SUCCESS) goto failed;
55 talloc_steal(tmp_ctx, res);
56 if (res->count > 1) goto failed;
58 if (res->count == 1) {
59 seqnumber = ldb_msg_find_uint64(res->msgs[0], "sequenceNumber", 0);
70 static NTSTATUS wreplsrv_open_winsdb(struct wreplsrv_service *service)
72 service->wins_db = winsdb_connect(service, WINSDB_HANDLE_CALLER_WREPL);
73 if (!service->wins_db) {
74 return NT_STATUS_INTERNAL_DB_ERROR;
77 service->config.ldb = wins_config_db_connect(service);
78 if (!service->config.ldb) {
79 return NT_STATUS_INTERNAL_DB_ERROR;
82 /* the default renew interval is 6 days */
83 service->config.renew_interval = lp_parm_int(-1,"wreplsrv","renew_interval", 6*24*60*60);
85 /* the default tombstone (extinction) interval is 6 days */
86 service->config.tombstone_interval= lp_parm_int(-1,"wreplsrv","tombstone_interval", 6*24*60*60);
88 /* the default tombstone (extinction) timeout is 1 day */
89 service->config.tombstone_timeout = lp_parm_int(-1,"wreplsrv","tombstone_timeout", 1*24*60*60);
91 /* the default tombstone extra timeout is 3 days */
92 service->config.tombstone_extra_timeout = lp_parm_int(-1,"wreplsrv","tombstone_extra_timeout", 3*24*60*60);
94 /* the default verify interval is 24 days */
95 service->config.verify_interval = lp_parm_int(-1,"wreplsrv","verify_interval", 24*24*60*60);
97 /* the default scavenging interval is 'renew_interval/2' */
98 service->config.scavenging_interval=lp_parm_int(-1,"wreplsrv","scavenging_interval",
99 service->config.renew_interval/2);
101 /* the maximun interval to the next periodic processing event */
102 service->config.periodic_interval = lp_parm_int(-1,"wreplsrv","periodic_interval", 15);
107 struct wreplsrv_partner *wreplsrv_find_partner(struct wreplsrv_service *service, const char *peer_addr)
109 struct wreplsrv_partner *cur;
111 for (cur = service->partners; cur; cur = cur->next) {
112 if (strcmp(cur->address, peer_addr) == 0) {
121 load our replication partners
123 NTSTATUS wreplsrv_load_partners(struct wreplsrv_service *service)
125 struct wreplsrv_partner *partner;
126 struct ldb_result *res = NULL;
128 TALLOC_CTX *tmp_ctx = talloc_new(service);
130 uint64_t new_seqnumber;
132 new_seqnumber = wins_config_db_get_seqnumber(service->config.ldb);
134 /* if it's not the first run and nothing changed we're done */
135 if (service->config.seqnumber != 0 && service->config.seqnumber == new_seqnumber) {
139 service->config.seqnumber = new_seqnumber;
141 /* find the record in the WINS database */
142 ret = ldb_search(service->config.ldb, ldb_dn_explode(tmp_ctx, "CN=PARTNERS"), LDB_SCOPE_SUBTREE,
143 "(objectClass=wreplPartner)", NULL, &res);
144 if (ret != LDB_SUCCESS) goto failed;
145 talloc_steal(tmp_ctx, res);
147 /* first disable all existing partners */
148 for (partner=service->partners; partner; partner = partner->next) {
149 partner->type = WINSREPL_PARTNER_NONE;
152 for (i=0; i < res->count; i++) {
155 address = ldb_msg_find_string(res->msgs[i], "address", NULL);
160 partner = wreplsrv_find_partner(service, address);
162 if (partner->name != partner->address) {
163 talloc_free(discard_const(partner->name));
165 partner->name = NULL;
166 talloc_free(discard_const(partner->our_address));
167 partner->our_address = NULL;
169 /* force rescheduling of pulling */
170 partner->pull.next_run = timeval_zero();
172 partner = talloc_zero(service, struct wreplsrv_partner);
173 if (partner == NULL) goto failed;
175 partner->service = service;
176 partner->address = address;
177 talloc_steal(partner, partner->address);
179 DLIST_ADD_END(service->partners, partner, struct wreplsrv_partner *);
182 partner->name = ldb_msg_find_string(res->msgs[i], "name", partner->address);
183 talloc_steal(partner, partner->name);
184 partner->our_address = ldb_msg_find_string(res->msgs[i], "ourAddress", NULL);
185 talloc_steal(partner, partner->our_address);
187 partner->type = ldb_msg_find_uint(res->msgs[i], "type", WINSREPL_PARTNER_BOTH);
188 partner->pull.interval = ldb_msg_find_uint(res->msgs[i], "pullInterval",
189 WINSREPL_DEFAULT_PULL_INTERVAL);
190 partner->pull.retry_interval = ldb_msg_find_uint(res->msgs[i], "pullRetryInterval",
191 WINSREPL_DEFAULT_PULL_RETRY_INTERVAL);
192 partner->push.change_count = ldb_msg_find_uint(res->msgs[i], "pushChangeCount",
193 WINSREPL_DEFAULT_PUSH_CHANGE_COUNT);
194 partner->push.use_inform = ldb_msg_find_uint(res->msgs[i], "pushUseInform", False);
196 DEBUG(3,("wreplsrv_load_partners: found partner: %s type: 0x%X\n",
197 partner->address, partner->type));
200 DEBUG(2,("wreplsrv_load_partners: %u partners found: wins_config_db seqnumber %llu\n",
201 res->count, service->config.seqnumber));
203 talloc_free(tmp_ctx);
206 talloc_free(tmp_ctx);
207 return NT_STATUS_FOOBAR;
210 NTSTATUS wreplsrv_fill_wrepl_table(struct wreplsrv_service *service,
212 struct wrepl_table *table_out,
213 const char *initiator,
216 struct wreplsrv_owner *cur;
219 table_out->partner_count = 0;
220 table_out->partners = NULL;
221 table_out->initiator = initiator;
223 for (cur = service->table; cur; cur = cur->next) {
225 table_out->partner_count++;
229 if (strcmp(initiator, cur->owner.address) != 0) continue;
231 table_out->partner_count++;
235 table_out->partners = talloc_array(mem_ctx, struct wrepl_wins_owner, table_out->partner_count);
236 NT_STATUS_HAVE_NO_MEMORY(table_out->partners);
238 for (cur = service->table; cur && i < table_out->partner_count; cur = cur->next) {
240 table_out->partners[i] = cur->owner;
245 if (strcmp(initiator, cur->owner.address) != 0) continue;
247 table_out->partners[i] = cur->owner;
255 struct wreplsrv_owner *wreplsrv_find_owner(struct wreplsrv_service *service,
256 struct wreplsrv_owner *table,
257 const char *wins_owner)
259 struct wreplsrv_owner *cur;
261 for (cur = table; cur; cur = cur->next) {
262 if (strcmp(cur->owner.address, wins_owner) == 0) {
264 * if it's our local entry
265 * update the max version
267 if (cur == service->owner) {
268 cur->owner.max_version = winsdb_get_maxVersion(service->wins_db);
278 update the wins_owner_table max_version, if the given version is the highest version
279 if no entry for the wins_owner exists yet, create one
281 NTSTATUS wreplsrv_add_table(struct wreplsrv_service *service,
282 TALLOC_CTX *mem_ctx, struct wreplsrv_owner **_table,
283 const char *wins_owner, uint64_t version)
285 struct wreplsrv_owner *table = *_table;
286 struct wreplsrv_owner *cur;
288 if (!wins_owner || strcmp(wins_owner, "0.0.0.0") == 0) {
289 wins_owner = service->wins_db->local_owner;
292 cur = wreplsrv_find_owner(service, table, wins_owner);
294 /* if it doesn't exists yet, create one */
296 cur = talloc_zero(mem_ctx, struct wreplsrv_owner);
297 NT_STATUS_HAVE_NO_MEMORY(cur);
299 cur->owner.address = talloc_strdup(cur, wins_owner);
300 NT_STATUS_HAVE_NO_MEMORY(cur->owner.address);
301 cur->owner.min_version = 0;
302 cur->owner.max_version = 0;
303 cur->owner.type = 1; /* don't know why this is always 1 */
305 cur->partner = wreplsrv_find_partner(service, wins_owner);
307 DLIST_ADD_END(table, cur, struct wreplsrv_owner *);
311 /* the min_version is always 0 here, and won't be updated */
313 /* if the given version is higher the then current nax_version, update */
314 if (cur->owner.max_version < version) {
315 cur->owner.max_version = version;
316 /* if it's for our local db, we need to update the wins.ldb too */
317 if (cur == service->owner) {
319 ret = winsdb_set_maxVersion(service->wins_db, cur->owner.max_version);
320 if (ret != cur->owner.max_version) {
321 DEBUG(0,("winsdb_set_maxVersion(%llu) failed: %llu\n",
322 cur->owner.max_version, ret));
323 return NT_STATUS_INTERNAL_DB_CORRUPTION;
332 load the partner table
334 static NTSTATUS wreplsrv_load_table(struct wreplsrv_service *service)
336 struct ldb_result *res = NULL;
339 TALLOC_CTX *tmp_ctx = talloc_new(service);
340 struct ldb_context *ldb = service->wins_db->ldb;
342 struct wreplsrv_owner *local_owner;
343 const char *wins_owner;
345 const char * const attrs[] = {
352 * make sure we have our local entry in the list,
353 * but we set service->owner when we're done
354 * to avoid to many calls to wreplsrv_local_max_version()
356 status = wreplsrv_add_table(service,
357 service, &service->table,
358 service->wins_db->local_owner, 0);
359 if (!NT_STATUS_IS_OK(status)) goto failed;
360 local_owner = wreplsrv_find_owner(service, service->table, service->wins_db->local_owner);
362 status = NT_STATUS_INTERNAL_ERROR;
366 /* find the record in the WINS database */
367 ret = ldb_search(ldb, NULL, LDB_SCOPE_SUBTREE,
368 "(objectClass=winsRecord)", attrs, &res);
369 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
370 if (ret != LDB_SUCCESS) goto failed;
371 talloc_steal(tmp_ctx, res);
373 for (i=0; i < res->count; i++) {
374 wins_owner = ldb_msg_find_string(res->msgs[i], "winsOwner", NULL);
375 version = ldb_msg_find_uint64(res->msgs[i], "versionID", 0);
377 status = wreplsrv_add_table(service,
378 service, &service->table,
379 wins_owner, version);
380 if (!NT_STATUS_IS_OK(status)) goto failed;
381 talloc_free(res->msgs[i]);
385 * this makes sure we call wreplsrv_local_max_version() before returning in
386 * wreplsrv_find_owner()
388 service->owner = local_owner;
391 * this makes sure the maxVersion in the database is updated,
392 * with the highest version we found, if this is higher than the current stored one
394 status = wreplsrv_add_table(service,
395 service, &service->table,
396 service->wins_db->local_owner, local_owner->owner.max_version);
397 if (!NT_STATUS_IS_OK(status)) goto failed;
399 talloc_free(tmp_ctx);
402 talloc_free(tmp_ctx);
407 setup our replication partners
409 static NTSTATUS wreplsrv_setup_partners(struct wreplsrv_service *service)
413 status = wreplsrv_load_partners(service);
414 NT_STATUS_NOT_OK_RETURN(status);
416 status = wreplsrv_load_table(service);
417 NT_STATUS_NOT_OK_RETURN(status);
423 startup the wrepl task
425 static void wreplsrv_task_init(struct task_server *task)
428 struct wreplsrv_service *service;
430 service = talloc_zero(task, struct wreplsrv_service);
432 task_server_terminate(task, "wreplsrv_task_init: out of memory");
435 service->task = task;
436 service->startup_time = timeval_current();
437 task->private = service;
440 * setup up all partners, and open the winsdb
442 status = wreplsrv_open_winsdb(service);
443 if (!NT_STATUS_IS_OK(status)) {
444 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_open_winsdb() failed");
449 * setup timed events for each partner we want to pull from
451 status = wreplsrv_setup_partners(service);
452 if (!NT_STATUS_IS_OK(status)) {
453 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_partners() failed");
458 * setup listen sockets, so we can anwser requests from our partners,
461 status = wreplsrv_setup_sockets(service);
462 if (!NT_STATUS_IS_OK(status)) {
463 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_sockets() failed");
467 status = wreplsrv_setup_periodic(service);
468 if (!NT_STATUS_IS_OK(status)) {
469 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_periodic() failed");
473 irpc_add_name(task->msg_ctx, "wrepl_server");
477 initialise the WREPL server
479 static NTSTATUS wreplsrv_init(struct event_context *event_ctx, const struct model_ops *model_ops)
481 if (!lp_wins_support()) {
485 return task_server_startup(event_ctx, model_ops, wreplsrv_task_init);
489 register ourselves as a available server
491 NTSTATUS server_service_wrepl_init(void)
493 return register_server_service("wrepl", wreplsrv_init);