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(service, struct wreplsrv_partner);
84 if (partner == NULL) goto failed;
86 partner->address = ldb_msg_find_string(res[i], "address", NULL);
87 if (!partner->address) goto failed;
88 partner->name = ldb_msg_find_string(res[i], "name", partner->address);
89 partner->type = ldb_msg_find_int(res[i], "type", WINSREPL_PARTNER_BOTH);
90 partner->pull.interval = ldb_msg_find_int(res[i], "pullInterval", WINSREPL_DEFAULT_PULL_INTERVAL);
91 partner->our_address = ldb_msg_find_string(res[i], "ourAddress", NULL);
93 talloc_steal(partner, partner->address);
94 talloc_steal(partner, partner->name);
95 talloc_steal(partner, partner->our_address);
97 DLIST_ADD(service->partners, partner);
100 talloc_free(tmp_ctx);
103 talloc_free(tmp_ctx);
104 return NT_STATUS_FOOBAR;
107 uint64_t wreplsrv_local_max_version(struct wreplsrv_service *service)
110 struct ldb_context *ldb = service->wins_db;
112 struct ldb_message **res = NULL;
113 TALLOC_CTX *tmp_ctx = talloc_new(service);
114 uint64_t maxVersion = 0;
116 dn = ldb_dn_explode(tmp_ctx, "CN=VERSION");
117 if (!dn) goto failed;
119 /* find the record in the WINS database */
120 ret = ldb_search(ldb, dn, LDB_SCOPE_BASE,
123 talloc_steal(tmp_ctx, res);
125 if (ret < 0) goto failed;
126 if (ret > 1) goto failed;
129 maxVersion = ldb_msg_find_uint64(res[0], "maxVersion", 0);
133 talloc_free(tmp_ctx);
137 struct wreplsrv_owner *wreplsrv_find_owner(struct wreplsrv_owner *table, const char *wins_owner)
139 struct wreplsrv_owner *cur;
141 for (cur = table; cur; cur = cur->next) {
142 if (strcmp(cur->owner.address, wins_owner) == 0) {
151 update the wins_owner_table max_version, if the given version is the highest version
152 if no entry for the wins_owner exists yet, create one
154 static NTSTATUS wreplsrv_add_table(struct wreplsrv_service *service,
155 TALLOC_CTX *mem_ctx, struct wreplsrv_owner **_table,
156 const char *wins_owner, uint64_t version)
158 struct wreplsrv_owner *table = *_table;
159 struct wreplsrv_owner *cur;
161 if (strcmp(WINSDB_OWNER_LOCAL, wins_owner) == 0) {
165 cur = wreplsrv_find_owner(table, wins_owner);
167 /* if it doesn't exists yet, create one */
169 cur = talloc_zero(mem_ctx, struct wreplsrv_owner);
170 NT_STATUS_HAVE_NO_MEMORY(cur);
172 cur->owner.address = talloc_strdup(cur, wins_owner);
173 NT_STATUS_HAVE_NO_MEMORY(cur->owner.address);
174 cur->owner.min_version = 0;
175 cur->owner.max_version = 0;
176 cur->owner.type = 1; /* don't know why this is always 1 */
178 cur->partner = wreplsrv_find_partner(service, wins_owner);
180 DLIST_ADD(table, cur);
184 /* the min_version is always 0 here, and won't be updated */
186 /* if the given version is higher the then current nax_version, update */
187 if (cur->owner.max_version < version) {
188 cur->owner.max_version = version;
195 load the partner table
197 static NTSTATUS wreplsrv_load_table(struct wreplsrv_service *service)
199 struct ldb_message **res = NULL;
202 TALLOC_CTX *tmp_ctx = talloc_new(service);
204 const char *wins_owner;
206 const char * const attrs[] = {
212 /* find the record in the WINS database */
213 ret = ldb_search(service->wins_db, NULL, LDB_SCOPE_SUBTREE,
214 "(objectClass=winsRecord)", attrs, &res);
216 talloc_steal(tmp_ctx, res);
218 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
219 if (ret < 0) goto failed;
220 if (ret == 0) goto done;
222 for (i=0; i < ret; i++) {
223 wins_owner = ldb_msg_find_string(res[i], "winsOwner", NULL);
224 version = ldb_msg_find_uint64(res[i], "versionID", 0);
227 status = wreplsrv_add_table(service,
228 service, &service->table,
229 wins_owner, version);
230 if (!NT_STATUS_IS_OK(status)) goto failed;
234 /* TODO: what's abut the per address owners? */
237 talloc_free(tmp_ctx);
240 talloc_free(tmp_ctx);
245 setup our replication partners
247 static NTSTATUS wreplsrv_setup_partners(struct wreplsrv_service *service)
251 status = wreplsrv_load_partners(service);
252 NT_STATUS_NOT_OK_RETURN(status);
254 status = wreplsrv_load_table(service);
255 NT_STATUS_NOT_OK_RETURN(status);
257 status = wreplsrv_setup_out_connections(service);
258 NT_STATUS_NOT_OK_RETURN(status);
264 startup the wrepl task
266 static void wreplsrv_task_init(struct task_server *task)
269 struct wreplsrv_service *service;
271 service = talloc_zero(task, struct wreplsrv_service);
273 task_server_terminate(task, "wreplsrv_task_init: out of memory");
276 service->task = task;
277 task->private = service;
280 * setup up all partners, and open the winsdb
282 status = wreplsrv_open_winsdb(service);
283 if (!NT_STATUS_IS_OK(status)) {
284 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_open_winsdb() failed");
289 * setup timed events for each partner we want to pull from
291 status = wreplsrv_setup_partners(service);
292 if (!NT_STATUS_IS_OK(status)) {
293 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_partners() failed");
298 * setup listen sockets, so we can anwser requests from our partners,
301 status = wreplsrv_setup_sockets(service);
302 if (!NT_STATUS_IS_OK(status)) {
303 task_server_terminate(task, "wreplsrv_task_init: wreplsrv_setup_sockets() failed");
307 irpc_add_name(task->msg_ctx, "wrepl_server");
311 initialise the WREPL server
313 static NTSTATUS wreplsrv_init(struct event_context *event_ctx, const struct model_ops *model_ops)
315 return task_server_startup(event_ctx, model_ops, wreplsrv_task_init);
319 register ourselves as a available server
321 NTSTATUS server_service_wrepl_init(void)
323 return register_server_service("wrepl", wreplsrv_init);