2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Tridgell 2005
7 Copyright (C) Stefan Metzmacher 2005
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include "nbt_server/nbt_server.h"
26 #include "nbt_server/wins/winsdb.h"
27 #include "lib/ldb/include/ldb.h"
28 #include "lib/ldb/include/ldb_errors.h"
30 #include "system/time.h"
31 #include "auth/auth.h"
34 return the new maxVersion and save it
36 static uint64_t winsdb_allocate_version(struct ldb_context *wins_db)
41 struct ldb_result *res = NULL;
42 struct ldb_message *msg = NULL;
43 TALLOC_CTX *tmp_ctx = talloc_new(wins_db);
44 uint64_t maxVersion = 0;
46 trans = ldb_transaction_start(wins_db);
47 if (trans != LDB_SUCCESS) goto failed;
49 dn = ldb_dn_explode(tmp_ctx, "CN=VERSION");
52 /* find the record in the WINS database */
53 ret = ldb_search(wins_db, dn, LDB_SCOPE_BASE, NULL, NULL, &res);
55 if (ret != LDB_SUCCESS) goto failed;
56 if (res->count > 1) goto failed;
58 talloc_steal(tmp_ctx, res);
60 if (res->count == 1) {
61 maxVersion = ldb_msg_find_uint64(res->msgs[0], "maxVersion", 0);
65 msg = ldb_msg_new(tmp_ctx);
66 if (!msg) goto failed;
70 ret = ldb_msg_add_empty(msg, "objectClass", LDB_FLAG_MOD_REPLACE);
71 if (ret != 0) goto failed;
72 ret = ldb_msg_add_string(msg, "objectClass", "winsMaxVersion");
73 if (ret != 0) goto failed;
74 ret = ldb_msg_add_empty(msg, "maxVersion", LDB_FLAG_MOD_REPLACE);
75 if (ret != 0) goto failed;
76 ret = ldb_msg_add_fmt(msg, "maxVersion", "%llu", (long long)maxVersion);
77 if (ret != 0) goto failed;
79 ret = ldb_modify(wins_db, msg);
80 if (ret != 0) ret = ldb_add(wins_db, msg);
81 if (ret != 0) goto failed;
83 trans = ldb_transaction_commit(wins_db);
84 if (trans != LDB_SUCCESS) goto failed;
90 if (trans == LDB_SUCCESS) ldb_transaction_cancel(wins_db);
96 return a DN for a nbt_name
98 static struct ldb_dn *winsdb_dn(TALLOC_CTX *mem_ctx, struct nbt_name *name)
102 dn = ldb_dn_string_compose(mem_ctx, NULL, "type=0x%02X", name->type);
103 if (dn && name->name && *name->name) {
104 dn = ldb_dn_string_compose(mem_ctx, dn, "name=%s", name->name);
106 if (dn && name->scope && *name->scope) {
107 dn = ldb_dn_string_compose(mem_ctx, dn, "scope=%s", name->scope);
112 static NTSTATUS winsdb_nbt_name(TALLOC_CTX *mem_ctx, struct ldb_dn *dn, struct nbt_name **_name)
115 struct nbt_name *name;
118 name = talloc(mem_ctx, struct nbt_name);
120 status = NT_STATUS_NO_MEMORY;
124 if (dn->comp_num > 3) {
125 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
129 if (dn->comp_num > cur && strcasecmp("scope", dn->components[cur].name) == 0) {
130 name->scope = talloc_steal(name, dn->components[cur].value.data);
136 if (dn->comp_num > cur && strcasecmp("name", dn->components[cur].name) == 0) {
137 name->name = talloc_steal(name, dn->components[cur].value.data);
140 name->name = talloc_strdup(name, "");
142 status = NT_STATUS_NO_MEMORY;
147 if (dn->comp_num > cur && strcasecmp("type", dn->components[cur].name) == 0) {
148 name->type = strtoul((char *)dn->components[cur].value.data, NULL, 0);
151 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
163 decode the winsdb_addr("address") attribute:
165 "172.31.1.1;winsOwner:172.31.9.202;expireTime:20050923032330.0Z;"
168 static NTSTATUS winsdb_addr_decode(struct winsdb_record *rec, struct ldb_val *val,
169 TALLOC_CTX *mem_ctx, struct winsdb_addr **_addr)
172 struct winsdb_addr *addr;
178 addr = talloc(mem_ctx, struct winsdb_addr);
180 status = NT_STATUS_NO_MEMORY;
184 address = (char *)val->data;
186 p = strchr(address, ';');
188 /* support old entries, with only the address */
189 addr->address = talloc_steal(addr, val->data);
190 addr->wins_owner = talloc_reference(addr, rec->wins_owner);
191 if (!addr->wins_owner) {
192 status = NT_STATUS_NO_MEMORY;
195 addr->expire_time = rec->expire_time;
201 addr->address = talloc_strdup(addr, address);
202 if (!addr->address) {
203 status = NT_STATUS_NO_MEMORY;
207 if (strncmp("winsOwner:", p, 10) != 0) {
208 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
212 p = strchr(wins_owner, ';');
214 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
219 addr->wins_owner = talloc_strdup(addr, wins_owner);
220 if (!addr->wins_owner) {
221 status = NT_STATUS_NO_MEMORY;
225 if (strncmp("expireTime:", p, 11) != 0) {
226 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
230 expire_time = p + 11;
231 p = strchr(expire_time, ';');
233 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
238 addr->expire_time = ldb_string_to_time(expire_time);
248 encode the winsdb_addr("address") attribute like this:
249 "172.31.1.1;winsOwner:172.31.9.202;expireTime:20050923032330.0Z;"
251 static int ldb_msg_add_winsdb_addr(struct ldb_message *msg,
252 const char *attr_name, struct winsdb_addr *addr)
257 str = talloc_asprintf(msg, "%s;winsOwner:%s;expireTime:%s;",
258 addr->address, addr->wins_owner,
259 ldb_timestring(msg, addr->expire_time));
262 val.data = discard_const_p(uint8_t, str);
263 val.length = strlen(str);
265 return ldb_msg_add_value(msg, attr_name, &val);
268 struct winsdb_addr **winsdb_addr_list_make(TALLOC_CTX *mem_ctx)
270 struct winsdb_addr **addresses;
272 addresses = talloc_array(mem_ctx, struct winsdb_addr *, 1);
273 if (!addresses) return NULL;
280 struct winsdb_addr **winsdb_addr_list_add(struct winsdb_addr **addresses, const char *address,
281 const char *wins_owner, time_t expire_time)
283 size_t len = winsdb_addr_list_length(addresses);
285 addresses = talloc_realloc(addresses, addresses, struct winsdb_addr *, len + 2);
286 if (!addresses) return NULL;
288 addresses[len] = talloc(addresses, struct winsdb_addr);
289 if (!addresses[len]) {
290 talloc_free(addresses);
294 addresses[len]->address = talloc_strdup(addresses[len], address);
295 if (!addresses[len]->address) {
296 talloc_free(addresses);
300 addresses[len]->wins_owner = talloc_strdup(addresses[len], wins_owner);
301 if (!addresses[len]->wins_owner) {
302 talloc_free(addresses);
306 addresses[len]->expire_time = expire_time;
308 addresses[len+1] = NULL;
313 void winsdb_addr_list_remove(struct winsdb_addr **addresses, const char *address)
317 for (i=0; addresses[i]; i++) {
318 if (strcmp(addresses[i]->address, address) == 0) {
322 if (!addresses[i]) return;
324 for (; addresses[i]; i++) {
325 addresses[i] = addresses[i+1];
331 struct winsdb_addr *winsdb_addr_list_check(struct winsdb_addr **addresses, const char *address)
335 for (i=0; addresses[i]; i++) {
336 if (strcmp(addresses[i]->address, address) == 0) {
344 size_t winsdb_addr_list_length(struct winsdb_addr **addresses)
347 for (i=0; addresses[i]; i++);
351 const char **winsdb_addr_string_list(TALLOC_CTX *mem_ctx, struct winsdb_addr **addresses)
353 size_t len = winsdb_addr_list_length(addresses);
354 const char **str_list=NULL;
357 for (i=0; i < len; i++) {
358 str_list = str_list_add(str_list, addresses[i]->address);
363 talloc_steal(mem_ctx, str_list);
368 load a WINS entry from the database
370 NTSTATUS winsdb_lookup(struct ldb_context *wins_db,
371 struct nbt_name *name,
373 struct winsdb_record **_rec)
376 struct ldb_result *res = NULL;
378 struct winsdb_record *rec;
379 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
381 /* find the record in the WINS database */
382 ret = ldb_search(wins_db, winsdb_dn(tmp_ctx, name), LDB_SCOPE_BASE,
385 if (ret != LDB_SUCCESS || res->count > 1) {
386 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
388 } else if (res->count== 0) {
389 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
393 talloc_steal(tmp_ctx, res);
395 status = winsdb_record(res->msgs[0], tmp_ctx, &rec);
396 if (!NT_STATUS_IS_OK(status)) goto failed;
398 /* see if it has already expired */
399 if (rec->state == WREPL_STATE_ACTIVE &&
400 rec->expire_time <= time(NULL)) {
401 DEBUG(5,("WINS: expiring name %s (expired at %s)\n",
402 nbt_name_string(tmp_ctx, rec->name), timestring(tmp_ctx, rec->expire_time)));
403 rec->state = WREPL_STATE_RELEASED;
406 talloc_steal(mem_ctx, rec);
407 talloc_free(tmp_ctx);
412 talloc_free(tmp_ctx);
416 NTSTATUS winsdb_record(struct ldb_message *msg, TALLOC_CTX *mem_ctx, struct winsdb_record **_rec)
419 struct winsdb_record *rec;
420 struct ldb_message_element *el;
421 struct nbt_name *name;
422 uint32_t i, num_values;
424 rec = talloc(mem_ctx, struct winsdb_record);
426 status = NT_STATUS_NO_MEMORY;
430 status = winsdb_nbt_name(rec, msg->dn, &name);
431 if (!NT_STATUS_IS_OK(status)) goto failed;
433 if (strlen(name->name) > 15) {
434 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
437 if (name->scope && strlen(name->scope) > 238) {
438 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
442 /* parse it into a more convenient winsdb_record structure */
444 rec->type = ldb_msg_find_int(msg, "recordType", WREPL_TYPE_UNIQUE);
445 rec->state = ldb_msg_find_int(msg, "recordState", WREPL_STATE_RELEASED);
446 rec->node = ldb_msg_find_int(msg, "nodeType", WREPL_NODE_B);
447 rec->is_static = ldb_msg_find_int(msg, "isStatic", 0);
448 rec->expire_time = ldb_string_to_time(ldb_msg_find_string(msg, "expireTime", NULL));
449 rec->version = ldb_msg_find_uint64(msg, "versionID", 0);
450 rec->wins_owner = ldb_msg_find_string(msg, "winsOwner", NULL);
451 rec->registered_by = ldb_msg_find_string(msg, "registeredBy", NULL);
452 talloc_steal(rec, rec->wins_owner);
453 talloc_steal(rec, rec->registered_by);
455 if (!rec->wins_owner) {
456 rec->wins_owner = talloc_strdup(rec, WINSDB_OWNER_LOCAL);
457 if (rec->wins_owner == NULL) {
458 status = NT_STATUS_NO_MEMORY;
463 el = ldb_msg_find_element(msg, "address");
465 num_values = el->num_values;
470 if (rec->type == WREPL_TYPE_UNIQUE || rec->type == WREPL_TYPE_GROUP) {
471 if (num_values != 1) {
472 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
476 if (rec->state == WREPL_STATE_ACTIVE) {
477 if (num_values < 1) {
478 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
483 rec->addresses = talloc_array(rec, struct winsdb_addr *, num_values+1);
484 if (rec->addresses == NULL) {
485 status = NT_STATUS_NO_MEMORY;
489 for (i=0;i<num_values;i++) {
490 status = winsdb_addr_decode(rec, &el->values[i], rec->addresses, &rec->addresses[i]);
491 if (!NT_STATUS_IS_OK(status)) goto failed;
493 rec->addresses[i] = NULL;
495 if (rec->is_static) {
496 if (num_values < 1) {
497 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
500 rec->state = WREPL_STATE_ACTIVE;
501 rec->expire_time = get_time_t_max();
502 for (i=0;rec->addresses[i];i++) {
503 rec->addresses[i]->expire_time = rec->expire_time;
510 if (NT_STATUS_EQUAL(NT_STATUS_INTERNAL_DB_CORRUPTION, status)) {
511 DEBUG(1,("winsdb_record: corrupted record: %s\n", ldb_dn_linearize(rec, msg->dn)));
518 form a ldb_message from a winsdb_record
520 struct ldb_message *winsdb_message(struct ldb_context *ldb,
521 struct winsdb_record *rec, TALLOC_CTX *mem_ctx)
525 struct ldb_message *msg = ldb_msg_new(mem_ctx);
526 if (msg == NULL) goto failed;
528 if (rec->is_static) {
529 rec->state = WREPL_STATE_ACTIVE;
530 rec->expire_time = get_time_t_max();
531 for (i=0;rec->addresses[i];i++) {
532 rec->addresses[i]->expire_time = rec->expire_time;
536 /* make sure we don't put in corrupted records */
537 addr_count = winsdb_addr_list_length(rec->addresses);
538 if (rec->state == WREPL_STATE_ACTIVE && addr_count == 0) {
539 rec->state = WREPL_STATE_RELEASED;
541 if (rec->type == WREPL_TYPE_UNIQUE && addr_count > 1) {
542 rec->type = WREPL_TYPE_MHOMED;
545 msg->dn = winsdb_dn(msg, rec->name);
546 if (msg->dn == NULL) goto failed;
547 ret |= ldb_msg_add_fmt(msg, "type", "0x%02X", rec->name->type);
548 if (rec->name->name && *rec->name->name) {
549 ret |= ldb_msg_add_string(msg, "name", rec->name->name);
551 if (rec->name->scope && *rec->name->scope) {
552 ret |= ldb_msg_add_string(msg, "scope", rec->name->scope);
554 ret |= ldb_msg_add_fmt(msg, "objectClass", "winsRecord");
555 ret |= ldb_msg_add_fmt(msg, "recordType", "%u", rec->type);
556 ret |= ldb_msg_add_fmt(msg, "recordState", "%u", rec->state);
557 ret |= ldb_msg_add_fmt(msg, "nodeType", "%u", rec->node);
558 ret |= ldb_msg_add_fmt(msg, "isStatic", "%u", rec->is_static);
559 ret |= ldb_msg_add_string(msg, "expireTime",
560 ldb_timestring(msg, rec->expire_time));
561 ret |= ldb_msg_add_fmt(msg, "versionID", "%llu", (long long)rec->version);
562 ret |= ldb_msg_add_string(msg, "winsOwner", rec->wins_owner);
563 ret |= ldb_msg_add_empty(msg, "address", 0);
564 for (i=0;rec->addresses[i];i++) {
565 ret |= ldb_msg_add_winsdb_addr(msg, "address", rec->addresses[i]);
567 ret |= ldb_msg_add_empty(msg, "registeredBy", 0);
568 if (rec->registered_by) {
569 ret |= ldb_msg_add_string(msg, "registeredBy", rec->registered_by);
570 if (ret != 0) goto failed;
580 save a WINS record into the database
582 uint8_t winsdb_add(struct ldb_context *wins_db, struct winsdb_record *rec, uint32_t flags)
584 struct ldb_message *msg;
585 TALLOC_CTX *tmp_ctx = talloc_new(wins_db);
589 trans = ldb_transaction_start(wins_db);
590 if (trans != LDB_SUCCESS) goto failed;
592 if (flags & WINSDB_FLAG_ALLOC_VERSION) {
593 rec->version = winsdb_allocate_version(wins_db);
594 if (rec->version == 0) goto failed;
596 if (flags & WINSDB_FLAG_TAKE_OWNERSHIP) {
597 rec->wins_owner = WINSDB_OWNER_LOCAL;
600 msg = winsdb_message(wins_db, rec, tmp_ctx);
601 if (msg == NULL) goto failed;
602 ret = ldb_add(wins_db, msg);
603 if (ret != 0) goto failed;
605 trans = ldb_transaction_commit(wins_db);
606 if (trans != LDB_SUCCESS) goto failed;
608 talloc_free(tmp_ctx);
612 if (trans == LDB_SUCCESS) ldb_transaction_cancel(wins_db);
613 talloc_free(tmp_ctx);
614 return NBT_RCODE_SVR;
619 modify a WINS record in the database
621 uint8_t winsdb_modify(struct ldb_context *wins_db, struct winsdb_record *rec, uint32_t flags)
623 struct ldb_message *msg;
624 TALLOC_CTX *tmp_ctx = talloc_new(wins_db);
629 trans = ldb_transaction_start(wins_db);
630 if (trans != LDB_SUCCESS) goto failed;
632 if (flags & WINSDB_FLAG_ALLOC_VERSION) {
633 rec->version = winsdb_allocate_version(wins_db);
634 if (rec->version == 0) goto failed;
636 if (flags & WINSDB_FLAG_TAKE_OWNERSHIP) {
637 rec->wins_owner = WINSDB_OWNER_LOCAL;
640 msg = winsdb_message(wins_db, rec, tmp_ctx);
641 if (msg == NULL) goto failed;
643 for (i=0;i<msg->num_elements;i++) {
644 msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
647 ret = ldb_modify(wins_db, msg);
648 if (ret != 0) goto failed;
650 trans = ldb_transaction_commit(wins_db);
651 if (trans != LDB_SUCCESS) goto failed;
653 talloc_free(tmp_ctx);
657 if (trans == LDB_SUCCESS) ldb_transaction_cancel(wins_db);
658 talloc_free(tmp_ctx);
659 return NBT_RCODE_SVR;
664 delete a WINS record from the database
666 uint8_t winsdb_delete(struct ldb_context *wins_db, struct winsdb_record *rec)
668 TALLOC_CTX *tmp_ctx = talloc_new(wins_db);
669 const struct ldb_dn *dn;
673 trans = ldb_transaction_start(wins_db);
674 if (trans != LDB_SUCCESS) goto failed;
676 dn = winsdb_dn(tmp_ctx, rec->name);
677 if (dn == NULL) goto failed;
679 ret = ldb_delete(wins_db, dn);
680 if (ret != 0) goto failed;
682 trans = ldb_transaction_commit(wins_db);
683 if (trans != LDB_SUCCESS) goto failed;
685 talloc_free(tmp_ctx);
689 if (trans == LDB_SUCCESS) ldb_transaction_cancel(wins_db);
690 talloc_free(tmp_ctx);
691 return NBT_RCODE_SVR;
694 struct ldb_context *winsdb_connect(TALLOC_CTX *mem_ctx)
696 return ldb_wrap_connect(mem_ctx, lock_path(mem_ctx, lp_wins_url()),
697 system_session(mem_ctx), NULL, 0, NULL);