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 "lib/events/events.h"
26 #include "lib/socket/socket.h"
27 #include "smbd/service_task.h"
28 #include "smbd/service_stream.h"
29 #include "lib/messaging/irpc.h"
30 #include "librpc/gen_ndr/ndr_winsrepl.h"
31 #include "wrepl_server/wrepl_server.h"
32 #include "nbt_server/wins/winsdb.h"
33 #include "ldb/include/ldb.h"
38 static NTSTATUS wreplsrv_open_winsdb(struct wreplsrv_service *service)
40 service->wins_db = winsdb_connect(service);
41 if (!service->wins_db) {
42 return NT_STATUS_INTERNAL_DB_ERROR;
48 struct wreplsrv_partner *wreplsrv_find_partner(struct wreplsrv_service *service, const char *peer_addr)
50 struct wreplsrv_partner *cur;
52 for (cur = service->partners; cur; cur = cur->next) {
53 if (strcmp(cur->address, peer_addr) == 0) {
62 load our replication partners
64 static NTSTATUS wreplsrv_load_partners(struct wreplsrv_service *service)
66 struct ldb_message **res = NULL;
68 TALLOC_CTX *tmp_ctx = talloc_new(service);
71 /* find the record in the WINS database */
72 ret = ldb_search(service->wins_db, ldb_dn_explode(tmp_ctx, "CN=PARTNERS"), LDB_SCOPE_ONELEVEL,
73 "(objectClass=wreplPartner)", NULL, &res);
75 talloc_steal(tmp_ctx, res);
77 if (ret < 0) goto failed;
78 if (ret == 0) goto done;
80 for (i=0; i < ret; i++) {
81 struct wreplsrv_partner *partner;
83 partner = talloc_zero(service, struct wreplsrv_partner);
84 if (partner == NULL) goto failed;
85 partner->service = service;
87 partner->address = ldb_msg_find_string(res[i], "address", NULL);
88 if (!partner->address) goto failed;
89 partner->name = ldb_msg_find_string(res[i], "name", partner->address);
90 partner->type = ldb_msg_find_uint(res[i], "type", WINSREPL_PARTNER_BOTH);
91 partner->pull.interval = ldb_msg_find_uint(res[i], "pullInterval",
92 WINSREPL_DEFAULT_PULL_INTERVAL);
93 partner->pull.retry_interval = ldb_msg_find_uint(res[i], "pullRetryInterval",
94 WINSREPL_DEFAULT_PULL_RETRY_INTERVAL);
95 partner->our_address = ldb_msg_find_string(res[i], "ourAddress", NULL);
96 partner->push.change_count = ldb_msg_find_uint(res[i], "pushChangeCount",
97 WINSREPL_DEFAULT_PUSH_CHANGE_COUNT);
99 talloc_steal(partner, partner->address);
100 talloc_steal(partner, partner->name);
101 talloc_steal(partner, partner->our_address);
103 DLIST_ADD(service->partners, partner);
106 talloc_free(tmp_ctx);
109 talloc_free(tmp_ctx);
110 return NT_STATUS_FOOBAR;
113 BOOL wreplsrv_is_our_address(struct wreplsrv_service *service, const char *address)
115 const char *our_address;
117 if (lp_interfaces() && lp_bind_interfaces_only()) {
118 int num_interfaces = iface_count();
120 for(i = 0; i < num_interfaces; i++) {
121 our_address = iface_n_ip(i);
122 if (strcasecmp(our_address, address) == 0) {
127 our_address = lp_socket_address();
128 if (strcasecmp(our_address, address) == 0) {
136 uint64_t wreplsrv_local_max_version(struct wreplsrv_service *service)
139 struct ldb_context *ldb = service->wins_db;
141 struct ldb_message **res = NULL;
142 TALLOC_CTX *tmp_ctx = talloc_new(service);
143 uint64_t maxVersion = 0;
145 dn = ldb_dn_explode(tmp_ctx, "CN=VERSION");
146 if (!dn) goto failed;
148 /* find the record in the WINS database */
149 ret = ldb_search(ldb, dn, LDB_SCOPE_BASE,
152 talloc_steal(tmp_ctx, res);
154 if (ret < 0) goto failed;
155 if (ret > 1) goto failed;
158 maxVersion = ldb_msg_find_uint64(res[0], "maxVersion", 0);
162 talloc_free(tmp_ctx);
166 NTSTATUS wreplsrv_fill_wrepl_table(struct wreplsrv_service *service,
168 struct wrepl_table *table_out,
170 const char *initiator,
173 struct wreplsrv_owner *cur;
174 uint64_t local_max_version;
177 table_out->partner_count = 0;
178 table_out->partners = NULL;
179 table_out->initiator = initiator;
181 local_max_version = wreplsrv_local_max_version(service);
182 if (local_max_version > 0) {
183 table_out->partner_count++;
186 for (cur = service->table; full_table && cur; cur = cur->next) {
187 table_out->partner_count++;
190 table_out->partners = talloc_array(mem_ctx, struct wrepl_wins_owner, table_out->partner_count);
191 NT_STATUS_HAVE_NO_MEMORY(table_out->partners);
193 if (local_max_version > 0) {
194 table_out->partners[i].address = our_ip;
195 table_out->partners[i].min_version = 0;
196 table_out->partners[i].max_version = local_max_version;
197 table_out->partners[i].type = 1;
201 for (cur = service->table; full_table && cur; cur = cur->next) {
202 table_out->partners[i] = cur->owner;
209 struct wreplsrv_owner *wreplsrv_find_owner(struct wreplsrv_owner *table, const char *wins_owner)
211 struct wreplsrv_owner *cur;
213 for (cur = table; cur; cur = cur->next) {
214 if (strcmp(cur->owner.address, wins_owner) == 0) {
223 update the wins_owner_table max_version, if the given version is the highest version
224 if no entry for the wins_owner exists yet, create one
226 NTSTATUS wreplsrv_add_table(struct wreplsrv_service *service,
227 TALLOC_CTX *mem_ctx, struct wreplsrv_owner **_table,
228 const char *wins_owner, uint64_t version)
230 struct wreplsrv_owner *table = *_table;
231 struct wreplsrv_owner *cur;
233 if (strcmp(WINSDB_OWNER_LOCAL, wins_owner) == 0) {
237 cur = wreplsrv_find_owner(table, wins_owner);
239 /* if it doesn't exists yet, create one */
241 cur = talloc_zero(mem_ctx, struct wreplsrv_owner);
242 NT_STATUS_HAVE_NO_MEMORY(cur);
244 cur->owner.address = talloc_strdup(cur, wins_owner);
245 NT_STATUS_HAVE_NO_MEMORY(cur->owner.address);
246 cur->owner.min_version = 0;
247 cur->owner.max_version = 0;
248 cur->owner.type = 1; /* don't know why this is always 1 */
250 cur->partner = wreplsrv_find_partner(service, wins_owner);
252 DLIST_ADD(table, cur);
256 /* the min_version is always 0 here, and won't be updated */
258 /* if the given version is higher the then current nax_version, update */
259 if (cur->owner.max_version < version) {
260 cur->owner.max_version = version;
267 load the partner table
269 static NTSTATUS wreplsrv_load_table(struct wreplsrv_service *service)
271 struct ldb_message **res = NULL;
274 TALLOC_CTX *tmp_ctx = talloc_new(service);
276 const char *wins_owner;
278 const char * const attrs[] = {
284 /* find the record in the WINS database */
285 ret = ldb_search(service->wins_db, NULL, LDB_SCOPE_SUBTREE,
286 "(objectClass=winsRecord)", attrs, &res);
288 talloc_steal(tmp_ctx, res);
290 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
291 if (ret < 0) goto failed;
292 if (ret == 0) goto done;
294 for (i=0; i < ret; i++) {
295 wins_owner = ldb_msg_find_string(res[i], "winsOwner", NULL);
296 version = ldb_msg_find_uint64(res[i], "versionID", 0);
299 status = wreplsrv_add_table(service,
300 service, &service->table,
301 wins_owner, version);
302 if (!NT_STATUS_IS_OK(status)) goto failed;
306 /* TODO: what's abut the per address owners? */
309 talloc_free(tmp_ctx);
312 talloc_free(tmp_ctx);
317 setup our replication partners
319 static NTSTATUS wreplsrv_setup_partners(struct wreplsrv_service *service)
323 status = wreplsrv_load_partners(service);
324 NT_STATUS_NOT_OK_RETURN(status);
326 status = wreplsrv_load_table(service);
327 NT_STATUS_NOT_OK_RETURN(status);
329 status = wreplsrv_setup_out_connections(service);
330 NT_STATUS_NOT_OK_RETURN(status);
336 startup the wrepl task
338 static void wreplsrv_task_init(struct task_server *task)
341 struct wreplsrv_service *service;
343 service = talloc_zero(task, struct wreplsrv_service);
345 task_server_terminate(task, "wreplsrv_task_init: out of memory");
348 service->task = task;
349 task->private = service;
352 * setup up all partners, and open the winsdb
354 status = wreplsrv_open_winsdb(service);
355 if (!NT_STATUS_IS_OK(status)) {
356 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_open_winsdb() failed");
361 * setup timed events for each partner we want to pull from
363 status = wreplsrv_setup_partners(service);
364 if (!NT_STATUS_IS_OK(status)) {
365 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_partners() failed");
370 * setup listen sockets, so we can anwser requests from our partners,
373 status = wreplsrv_setup_sockets(service);
374 if (!NT_STATUS_IS_OK(status)) {
375 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_sockets() failed");
379 irpc_add_name(task->msg_ctx, "wrepl_server");
383 initialise the WREPL server
385 static NTSTATUS wreplsrv_init(struct event_context *event_ctx, const struct model_ops *model_ops)
387 if (!lp_wins_support()) {
391 return task_server_startup(event_ctx, model_ops, wreplsrv_task_init);
395 register ourselves as a available server
397 NTSTATUS server_service_wrepl_init(void)
399 return register_server_service("wrepl", wreplsrv_init);