WINS database routines
Copyright (C) Andrew Tridgell 2005
-
+ Copyright (C) Stefan Metzmacher 2005
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
#include "nbt_server/wins/winsdb.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
-#include "db_wrap.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
#include "system/time.h"
+#include "db_wrap.h"
+#include "system/network.h"
+#include "netif/netif.h"
+
+uint64_t winsdb_get_maxVersion(struct winsdb_handle *h)
+{
+ int ret;
+ struct ldb_context *ldb = h->ldb;
+ struct ldb_dn *dn;
+ struct ldb_result *res = NULL;
+ TALLOC_CTX *tmp_ctx = talloc_new(ldb);
+ uint64_t maxVersion = 0;
+
+ dn = ldb_dn_explode(tmp_ctx, "CN=VERSION");
+ if (!dn) goto failed;
+
+ /* find the record in the WINS database */
+ ret = ldb_search(ldb, dn, LDB_SCOPE_BASE,
+ NULL, NULL, &res);
+ if (ret != LDB_SUCCESS) goto failed;
+ talloc_steal(tmp_ctx, res);
+ if (res->count > 1) goto failed;
+
+ if (res->count == 1) {
+ maxVersion = ldb_msg_find_uint64(res->msgs[0], "maxVersion", 0);
+ }
+
+failed:
+ talloc_free(tmp_ctx);
+ return maxVersion;
+}
/*
- return the new maxVersion and save it
+ if newVersion == 0 return the old maxVersion + 1 and save it
+ if newVersion > 0 return MAX(oldMaxVersion, newMaxVersion) and save it
*/
-static uint64_t winsdb_allocate_version(struct wins_server *winssrv)
+uint64_t winsdb_set_maxVersion(struct winsdb_handle *h, uint64_t newMaxVersion)
{
+ int trans;
int ret;
- struct ldb_context *ldb = winssrv->wins_db;
struct ldb_dn *dn;
- struct ldb_message **res = NULL;
+ struct ldb_result *res = NULL;
struct ldb_message *msg = NULL;
- TALLOC_CTX *tmp_ctx = talloc_new(winssrv);
- uint64_t maxVersion = 0;
+ struct ldb_context *wins_db = h->ldb;
+ TALLOC_CTX *tmp_ctx = talloc_new(wins_db);
+ uint64_t oldMaxVersion = 0;
+
+ trans = ldb_transaction_start(wins_db);
+ if (trans != LDB_SUCCESS) goto failed;
dn = ldb_dn_explode(tmp_ctx, "CN=VERSION");
if (!dn) goto failed;
- ret |= ldb_msg_add_string(msg, "objectClass", "winsEntry");
- ret |= ldb_msg_add_fmt(msg, "minVersion", "%llu", winssrv->min_version);
- ret |= ldb_msg_add_fmt(msg, "maxVersion", "%llu", winssrv->max_version);
- if (ret != 0) goto failed;
+ /* find the record in the WINS database */
+ ret = ldb_search(wins_db, dn, LDB_SCOPE_BASE, NULL, NULL, &res);
+
+ if (ret != LDB_SUCCESS) goto failed;
+ if (res->count > 1) goto failed;
+
+ talloc_steal(tmp_ctx, res);
+
+ if (res->count == 1) {
+ oldMaxVersion = ldb_msg_find_uint64(res->msgs[0], "maxVersion", 0);
+ }
- if (ret == 1) {
- maxVersion = ldb_msg_find_uint64(res[0], "maxVersion", 0);
+ if (newMaxVersion == 0) {
+ newMaxVersion = oldMaxVersion + 1;
+ } else {
+ newMaxVersion = MAX(oldMaxVersion, newMaxVersion);
}
- maxVersion++;
msg = ldb_msg_new(tmp_ctx);
if (!msg) goto failed;
msg->dn = dn;
- ret = ldb_msg_add_empty(ldb, msg, "maxVersion", LDB_FLAG_MOD_REPLACE);
+ ret = ldb_msg_add_empty(msg, "objectClass", LDB_FLAG_MOD_REPLACE);
+ if (ret != 0) goto failed;
+ ret = ldb_msg_add_string(msg, "objectClass", "winsMaxVersion");
if (ret != 0) goto failed;
- ret = ldb_msg_add_fmt(ldb, msg, "maxVersion", "%llu", maxVersion);
+ ret = ldb_msg_add_empty(msg, "maxVersion", LDB_FLAG_MOD_REPLACE);
+ if (ret != 0) goto failed;
+ ret = ldb_msg_add_fmt(msg, "maxVersion", "%llu", (long long)newMaxVersion);
if (ret != 0) goto failed;
- ret = ldb_modify(ldb, msg);
- if (ret != 0) ret = ldb_add(ldb, msg);
+ ret = ldb_modify(wins_db, msg);
+ if (ret != 0) ret = ldb_add(wins_db, msg);
if (ret != 0) goto failed;
+ trans = ldb_transaction_commit(wins_db);
+ if (trans != LDB_SUCCESS) goto failed;
+
talloc_free(tmp_ctx);
- return maxVersion;
+ return newMaxVersion;
failed:
+ if (trans == LDB_SUCCESS) ldb_transaction_cancel(wins_db);
talloc_free(tmp_ctx);
return 0;
}
-/*
- allocate a new version id for a record
-*/
-static uint64_t winsdb_allocate_version(struct wins_server *winssrv)
+uint64_t winsdb_get_seqnumber(struct winsdb_handle *h)
{
- winssrv->max_version++;
- if (!winsdb_save_version(winssrv)) {
- return 0;
- }
- return winssrv->max_version;
-}
+ int ret;
+ struct ldb_context *ldb = h->ldb;
+ struct ldb_dn *dn;
+ struct ldb_result *res = NULL;
+ TALLOC_CTX *tmp_ctx = talloc_new(ldb);
+ uint64_t seqnumber = 0;
-/*
- remove a version id
-*/
-static BOOL winsdb_remove_version(struct wins_server *winssrv, uint64_t version)
-{
- if (version == winssrv->min_version) {
- winssrv->min_version++;
- return winsdb_save_version(winssrv);
+ dn = ldb_dn_explode(tmp_ctx, "@BASEINFO");
+ if (!dn) goto failed;
+
+ /* find the record in the WINS database */
+ ret = ldb_search(ldb, dn, LDB_SCOPE_BASE,
+ NULL, NULL, &res);
+ if (ret != LDB_SUCCESS) goto failed;
+ talloc_steal(tmp_ctx, res);
+ if (res->count > 1) goto failed;
+
+ if (res->count == 1) {
+ seqnumber = ldb_msg_find_uint64(res->msgs[0], "sequenceNumber", 0);
}
- return True;
+failed:
+ talloc_free(tmp_ctx);
+ return seqnumber;
}
-
/*
return a DN for a nbt_name
*/
{
struct ldb_dn *dn;
- dn = ldb_dn_string_compose(mem_ctx, NULL, "type=%02x", name->type);
+ dn = ldb_dn_string_compose(mem_ctx, NULL, "type=0x%02X", name->type);
if (dn && name->name && *name->name) {
dn = ldb_dn_string_compose(mem_ctx, dn, "name=%s", name->name);
}
return dn;
}
-static struct winsdb_addr *winsdb_addr_decode(TALLOC_CTX *mem_ctx, struct ldb_val *val)
+static NTSTATUS winsdb_nbt_name(TALLOC_CTX *mem_ctx, struct ldb_dn *dn, struct nbt_name **_name)
{
+ NTSTATUS status;
+ struct nbt_name *name;
+ uint32_t cur = 0;
+
+ name = talloc(mem_ctx, struct nbt_name);
+ if (!name) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
+
+ if (dn->comp_num > 3) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ }
+
+ if (dn->comp_num > cur && strcasecmp("scope", dn->components[cur].name) == 0) {
+ name->scope = talloc_steal(name, dn->components[cur].value.data);
+ cur++;
+ } else {
+ name->scope = NULL;
+ }
+
+ if (dn->comp_num > cur && strcasecmp("name", dn->components[cur].name) == 0) {
+ name->name = talloc_steal(name, dn->components[cur].value.data);
+ cur++;
+ } else {
+ name->name = talloc_strdup(name, "");
+ if (!name->name) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
+ }
+
+ if (dn->comp_num > cur && strcasecmp("type", dn->components[cur].name) == 0) {
+ name->type = strtoul((char *)dn->components[cur].value.data, NULL, 0);
+ cur++;
+ } else {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ }
+
+ *_name = name;
+ return NT_STATUS_OK;
+failed:
+ talloc_free(name);
+ return status;
+}
+
+/*
+ decode the winsdb_addr("address") attribute:
+ "172.31.1.1" or
+ "172.31.1.1;winsOwner:172.31.9.202;expireTime:20050923032330.0Z;"
+ are valid records
+*/
+static NTSTATUS winsdb_addr_decode(struct winsdb_handle *h, struct winsdb_record *rec, struct ldb_val *val,
+ TALLOC_CTX *mem_ctx, struct winsdb_addr **_addr)
+{
+ NTSTATUS status;
struct winsdb_addr *addr;
+ const char *address;
+ const char *wins_owner;
+ const char *expire_time;
+ char *p;
addr = talloc(mem_ctx, struct winsdb_addr);
- if (!addr) return NULL;
+ if (!addr) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
+
+ address = (char *)val->data;
+
+ p = strchr(address, ';');
+ if (!p) {
+ /* support old entries, with only the address */
+ addr->address = talloc_steal(addr, val->data);
+ addr->wins_owner = talloc_reference(addr, rec->wins_owner);
+ if (!addr->wins_owner) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
+ addr->expire_time = rec->expire_time;
+ *_addr = addr;
+ return NT_STATUS_OK;
+ }
- addr->address = talloc_steal(addr, val->data);
+ *p = '\0';p++;
+ addr->address = talloc_strdup(addr, address);
+ if (!addr->address) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
- return addr;
+ if (strncmp("winsOwner:", p, 10) != 0) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ }
+ wins_owner = p + 10;
+ p = strchr(wins_owner, ';');
+ if (!p) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ }
+
+ *p = '\0';p++;
+ if (strcmp(wins_owner, "0.0.0.0") == 0) {
+ wins_owner = h->local_owner;
+ }
+ addr->wins_owner = talloc_strdup(addr, wins_owner);
+ if (!addr->wins_owner) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
+
+ if (strncmp("expireTime:", p, 11) != 0) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ }
+
+ expire_time = p + 11;
+ p = strchr(expire_time, ';');
+ if (!p) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ }
+
+ *p = '\0';p++;
+ addr->expire_time = ldb_string_to_time(expire_time);
+
+ *_addr = addr;
+ return NT_STATUS_OK;
+failed:
+ talloc_free(addr);
+ return status;
}
-static int ldb_msg_add_winsdb_addr(struct ldb_context *ldb, struct ldb_message *msg,
+/*
+ encode the winsdb_addr("address") attribute like this:
+ non-static record:
+ "172.31.1.1;winsOwner:172.31.9.202;expireTime:20050923032330.0Z;"
+ static record:
+ "172.31.1.1"
+*/
+static int ldb_msg_add_winsdb_addr(struct ldb_message *msg, struct winsdb_record *rec,
const char *attr_name, struct winsdb_addr *addr)
{
struct ldb_val val;
+ const char *str;
+
+ if (rec->is_static) {
+ str = talloc_strdup(msg, addr->address);
+ if (!str) return -1;
+ } else {
+ char *expire_time;
+ expire_time = ldb_timestring(msg, addr->expire_time);
+ if (!expire_time) return -1;
+ str = talloc_asprintf(msg, "%s;winsOwner:%s;expireTime:%s;",
+ addr->address, addr->wins_owner,
+ expire_time);
+ talloc_free(expire_time);
+ if (!str) return -1;
+ }
- val.data = discard_const_p(uint8_t, addr->address);
- val.length = strlen(addr->address);
+ val.data = discard_const_p(uint8_t, str);
+ val.length = strlen(str);
- return ldb_msg_add_value(ldb, msg, attr_name, &val);
+ return ldb_msg_add_value(msg, attr_name, &val);
}
struct winsdb_addr **winsdb_addr_list_make(TALLOC_CTX *mem_ctx)
return addresses;
}
-struct winsdb_addr **winsdb_addr_list_add(struct winsdb_addr **addresses, const char *address)
+static int winsdb_addr_sort_list (struct winsdb_addr **p1, struct winsdb_addr **p2, void *opaque)
{
- size_t len = winsdb_addr_list_length(addresses);
+ struct winsdb_addr *a1 = talloc_get_type(*p1, struct winsdb_addr);
+ struct winsdb_addr *a2 = talloc_get_type(*p2, struct winsdb_addr);
+ struct winsdb_handle *h= talloc_get_type(opaque, struct winsdb_handle);
+ BOOL a1_owned = False;
+ BOOL a2_owned = False;
+
+ /*
+ * first the owned addresses with the newest to the oldest address
+ * then the replica addresses with the newest to the oldest address
+ */
+ if (a2->expire_time != a1->expire_time) {
+ return a2->expire_time - a1->expire_time;
+ }
+
+ if (strcmp(a2->wins_owner, h->local_owner) == 0) {
+ a2_owned = True;
+ }
+
+ if (strcmp(a1->wins_owner, h->local_owner) == 0) {
+ a1_owned = True;
+ }
+ return a2_owned - a1_owned;
+}
+
+struct winsdb_addr **winsdb_addr_list_add(struct winsdb_handle *h, const struct winsdb_record *rec,
+ struct winsdb_addr **addresses, const char *address,
+ const char *wins_owner, time_t expire_time,
+ BOOL is_name_registration)
+{
+ struct winsdb_addr *old_addr = NULL;
+ size_t len = 0;
+ size_t i;
+ BOOL found_old_replica = False;
+
+ /*
+ * count the addresses and maybe
+ * find an old entry for the new address
+ */
+ for (i=0; addresses[i]; i++) {
+ if (old_addr) continue;
+ if (strcmp(addresses[i]->address, address) == 0) {
+ old_addr = addresses[i];
+ }
+ }
+ len = i;
+
+ /*
+ * the address is already there
+ * and we can replace it
+ */
+ if (old_addr) {
+ goto remove_old_addr;
+ }
+
+ /*
+ * if we don't have 25 addresses already,
+ * we can just add the new address
+ */
+ if (len < 25) {
+ goto add_new_addr;
+ }
+
+ /*
+ * if we haven't found the address,
+ * and we have already have 25 addresses
+ * if so then we need to do the following:
+ * - if it isn't a name registration, then just ignore the new address
+ * - if it is a name registration, then first search for
+ * the oldest replica and if there's no replica address
+ * search the oldest owned address
+ */
+ if (!is_name_registration) {
+ return addresses;
+ }
+
+ /*
+ * find the oldest replica address, if there's no replica
+ * record at all, find the oldest owned address
+ */
+ for (i=0; addresses[i]; i++) {
+ BOOL cur_is_replica = False;
+ /* find out if the current address is a replica */
+ if (strcmp(addresses[i]->wins_owner, h->local_owner) != 0) {
+ cur_is_replica = True;
+ }
+
+ /*
+ * if we already found a replica address and the current address
+ * is not a replica, then skip it
+ */
+ if (found_old_replica && !cur_is_replica) continue;
+
+ /*
+ * if we found the first replica address, reset the address
+ * that would be replaced
+ */
+ if (!found_old_replica && cur_is_replica) {
+ found_old_replica = True;
+ old_addr = addresses[i];
+ continue;
+ }
+
+ /*
+ * if the first address isn't a replica, just start with
+ * the first one
+ */
+ if (!old_addr) {
+ old_addr = addresses[i];
+ continue;
+ }
+
+ /*
+ * see if we find an older address
+ */
+ if (addresses[i]->expire_time < old_addr->expire_time) {
+ old_addr = addresses[i];
+ continue;
+ }
+ }
+
+remove_old_addr:
+ winsdb_addr_list_remove(addresses, old_addr->address);
+ len --;
+
+add_new_addr:
addresses = talloc_realloc(addresses, addresses, struct winsdb_addr *, len + 2);
if (!addresses) return NULL;
addresses[len]->address = talloc_strdup(addresses[len], address);
if (!addresses[len]->address) {
talloc_free(addresses);
- return NULL;
+ return NULL;
}
+ addresses[len]->wins_owner = talloc_strdup(addresses[len], wins_owner);
+ if (!addresses[len]->wins_owner) {
+ talloc_free(addresses);
+ return NULL;
+ }
+
+ addresses[len]->expire_time = expire_time;
+
addresses[len+1] = NULL;
+ ldb_qsort(addresses, len+1 , sizeof(addresses[0]), h, (ldb_qsort_cmp_fn_t)winsdb_addr_sort_list);
+
return addresses;
}
break;
}
}
- if (!addresses[i]) return;
for (; addresses[i]; i++) {
addresses[i] = addresses[i+1];
const char **winsdb_addr_string_list(TALLOC_CTX *mem_ctx, struct winsdb_addr **addresses)
{
size_t len = winsdb_addr_list_length(addresses);
- const char **str_list;
+ const char **str_list=NULL;
size_t i;
- str_list = talloc_array(mem_ctx, const char *, len + 1);
- if (!str_list) return NULL;
-
for (i=0; i < len; i++) {
- str_list[i] = talloc_strdup(str_list, addresses[i]->address);
+ str_list = str_list_add(str_list, addresses[i]->address);
if (!str_list[i]) {
- talloc_free(str_list);
return NULL;
}
}
-
- str_list[len] = NULL;
+ talloc_steal(mem_ctx, str_list);
return str_list;
}
/*
load a WINS entry from the database
*/
-struct winsdb_record *winsdb_load(struct wins_server *winssrv,
- struct nbt_name *name, TALLOC_CTX *mem_ctx)
+NTSTATUS winsdb_lookup(struct winsdb_handle *h,
+ struct nbt_name *name,
+ TALLOC_CTX *mem_ctx,
+ struct winsdb_record **_rec)
{
- struct ldb_message **res = NULL;
+ NTSTATUS status;
+ struct ldb_result *res = NULL;
int ret;
struct winsdb_record *rec;
- struct ldb_message_element *el;
+ struct ldb_context *wins_db = h->ldb;
TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
- int i;
+ time_t now = time(NULL);
/* find the record in the WINS database */
- ret = ldb_search(winssrv->wins_db, winsdb_dn(tmp_ctx, name), LDB_SCOPE_BASE,
+ ret = ldb_search(wins_db, winsdb_dn(tmp_ctx, name), LDB_SCOPE_BASE,
NULL, NULL, &res);
- if (res != NULL) {
- talloc_steal(tmp_ctx, res);
+
+ if (ret != LDB_SUCCESS || res->count > 1) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ } else if (res->count== 0) {
+ status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ goto failed;
}
- if (ret != 1) goto failed;
- rec = talloc(tmp_ctx, struct winsdb_record);
- if (rec == NULL) goto failed;
+ talloc_steal(tmp_ctx, res);
+
+ status = winsdb_record(h, res->msgs[0], tmp_ctx, now, &rec);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ talloc_steal(mem_ctx, rec);
+ talloc_free(tmp_ctx);
+ *_rec = rec;
+ return NT_STATUS_OK;
+
+failed:
+ talloc_free(tmp_ctx);
+ return status;
+}
+
+NTSTATUS winsdb_record(struct winsdb_handle *h, struct ldb_message *msg, TALLOC_CTX *mem_ctx, time_t now, struct winsdb_record **_rec)
+{
+ NTSTATUS status;
+ struct winsdb_record *rec;
+ struct ldb_message_element *el;
+ struct nbt_name *name;
+ uint32_t i, j, num_values;
+
+ rec = talloc(mem_ctx, struct winsdb_record);
+ if (rec == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
+
+ status = winsdb_nbt_name(rec, msg->dn, &name);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ if (strlen(name->name) > 15) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ }
+ if (name->scope && strlen(name->scope) > 238) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ }
/* parse it into a more convenient winsdb_record structure */
- rec->name = name;
- rec->state = ldb_msg_find_int(res[0], "active", WINS_REC_RELEASED);
- rec->nb_flags = ldb_msg_find_int(res[0], "nbFlags", 0);
- rec->expire_time = ldb_string_to_time(ldb_msg_find_string(res[0], "expires", NULL));
- rec->registered_by = ldb_msg_find_string(res[0], "registeredBy", NULL);
- rec->version = ldb_msg_find_uint64(res[0], "version", 0);
+ rec->name = name;
+ rec->type = ldb_msg_find_int(msg, "recordType", WREPL_TYPE_UNIQUE);
+ rec->state = ldb_msg_find_int(msg, "recordState", WREPL_STATE_RELEASED);
+ rec->node = ldb_msg_find_int(msg, "nodeType", WREPL_NODE_B);
+ rec->is_static = ldb_msg_find_int(msg, "isStatic", 0);
+ rec->expire_time = ldb_string_to_time(ldb_msg_find_string(msg, "expireTime", NULL));
+ rec->version = ldb_msg_find_uint64(msg, "versionID", 0);
+ rec->wins_owner = ldb_msg_find_string(msg, "winsOwner", NULL);
+ rec->registered_by = ldb_msg_find_string(msg, "registeredBy", NULL);
+ talloc_steal(rec, rec->wins_owner);
talloc_steal(rec, rec->registered_by);
- el = ldb_msg_find_element(res[0], "address");
- if (el == NULL) goto failed;
+ if (!rec->wins_owner || strcmp(rec->wins_owner, "0.0.0.0") == 0) {
+ rec->wins_owner = h->local_owner;
+ }
- rec->addresses = talloc_array(rec, struct winsdb_addr *, el->num_values+1);
- if (rec->addresses == NULL) goto failed;
+ el = ldb_msg_find_element(msg, "address");
+ if (el) {
+ num_values = el->num_values;
+ } else {
+ num_values = 0;
+ }
- for (i=0;i<el->num_values;i++) {
- rec->addresses[i] = winsdb_addr_decode(rec->addresses, &el->values[i]);
- if (rec->addresses[i] == NULL) goto failed;
+ if (rec->type == WREPL_TYPE_UNIQUE || rec->type == WREPL_TYPE_GROUP) {
+ if (num_values != 1) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ }
+ }
+ if (rec->state == WREPL_STATE_ACTIVE) {
+ if (num_values < 1) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
+ }
+ }
+ if (num_values > 25) {
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto failed;
}
- rec->addresses[i] = NULL;
/* see if it has already expired */
- if (rec->state == WINS_REC_ACTIVE &&
- rec->expire_time <= time(NULL)) {
+ if (!rec->is_static &&
+ rec->expire_time <= now &&
+ rec->state == WREPL_STATE_ACTIVE) {
DEBUG(5,("WINS: expiring name %s (expired at %s)\n",
- nbt_name_string(tmp_ctx, rec->name), timestring(tmp_ctx, rec->expire_time)));
- rec->state = WINS_REC_RELEASED;
+ nbt_name_string(mem_ctx, rec->name), timestring(mem_ctx, rec->expire_time)));
+ rec->state = WREPL_STATE_RELEASED;
}
- talloc_steal(mem_ctx, rec);
- talloc_free(tmp_ctx);
- return rec;
+ rec->addresses = talloc_array(rec, struct winsdb_addr *, num_values+1);
+ if (rec->addresses == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
+ for (i=0,j=0;i<num_values;i++) {
+ status = winsdb_addr_decode(h, rec, &el->values[i], rec->addresses, &rec->addresses[j]);
+ if (!NT_STATUS_IS_OK(status)) goto failed;
+
+ /*
+ * the record isn't static and is active
+ * then don't add the address if it's expired
+ */
+ if (!rec->is_static &&
+ rec->addresses[j]->expire_time <= now &&
+ rec->state == WREPL_STATE_ACTIVE) {
+ DEBUG(5,("WINS: expiring name addr %s of %s (expired at %s)\n",
+ rec->addresses[j]->address, nbt_name_string(rec->addresses[j], rec->name),
+ timestring(rec->addresses[j], rec->addresses[j]->expire_time)));
+ talloc_free(rec->addresses[j]);
+ rec->addresses[j] = NULL;
+ continue;
+ }
+ j++;
+ }
+ rec->addresses[j] = NULL;
+ num_values = j;
+
+ if (rec->is_static && rec->state == WREPL_STATE_ACTIVE) {
+ rec->expire_time = get_time_t_max();
+ for (i=0;rec->addresses[i];i++) {
+ rec->addresses[i]->expire_time = rec->expire_time;
+ }
+ }
+
+ if (rec->state == WREPL_STATE_ACTIVE) {
+ if (num_values < 1) {
+ DEBUG(5,("WINS: expiring name %s (because it has no active addresses)\n",
+ nbt_name_string(mem_ctx, rec->name)));
+ rec->state = WREPL_STATE_RELEASED;
+ }
+ }
+
+ *_rec = rec;
+ return NT_STATUS_OK;
failed:
- talloc_free(tmp_ctx);
- return NULL;
+ if (NT_STATUS_EQUAL(NT_STATUS_INTERNAL_DB_CORRUPTION, status)) {
+ DEBUG(1,("winsdb_record: corrupted record: %s\n", ldb_dn_linearize(rec, msg->dn)));
+ }
+ talloc_free(rec);
+ return status;
}
-
/*
form a ldb_message from a winsdb_record
*/
-static struct ldb_message *winsdb_message(struct wins_server *winssrv,
- struct winsdb_record *rec, TALLOC_CTX *mem_ctx)
+struct ldb_message *winsdb_message(struct ldb_context *ldb,
+ struct winsdb_record *rec, TALLOC_CTX *mem_ctx)
{
int i, ret=0;
+ size_t addr_count;
+ const char *expire_time;
struct ldb_message *msg = ldb_msg_new(mem_ctx);
if (msg == NULL) goto failed;
+ /* make sure we don't put in corrupted records */
+ addr_count = winsdb_addr_list_length(rec->addresses);
+ if (rec->state == WREPL_STATE_ACTIVE && addr_count == 0) {
+ rec->state = WREPL_STATE_RELEASED;
+ }
+ if (rec->type == WREPL_TYPE_UNIQUE && addr_count > 1) {
+ rec->type = WREPL_TYPE_MHOMED;
+ }
+
+ expire_time = ldb_timestring(msg, rec->expire_time);
+ if (!expire_time) {
+ goto failed;
+ }
+
msg->dn = winsdb_dn(msg, rec->name);
if (msg->dn == NULL) goto failed;
- ret |= ldb_msg_add_fmt(msg, "objectClass", "wins");
- ret |= ldb_msg_add_fmt(msg, "active", "%u", rec->state);
- ret |= ldb_msg_add_fmt(msg, "nbFlags", "0x%04x", rec->nb_flags);
- ret |= ldb_msg_add_string(msg, "registeredBy", rec->registered_by);
- ret |= ldb_msg_add_string(msg, "expires",
- ldb_timestring(msg, rec->expire_time));
- ret |= ldb_msg_add_fmt(msg, "version", "%llu", rec->version);
+ ret |= ldb_msg_add_fmt(msg, "type", "0x%02X", rec->name->type);
+ if (rec->name->name && *rec->name->name) {
+ ret |= ldb_msg_add_string(msg, "name", rec->name->name);
+ }
+ if (rec->name->scope && *rec->name->scope) {
+ ret |= ldb_msg_add_string(msg, "scope", rec->name->scope);
+ }
+ ret |= ldb_msg_add_fmt(msg, "objectClass", "winsRecord");
+ ret |= ldb_msg_add_fmt(msg, "recordType", "%u", rec->type);
+ ret |= ldb_msg_add_fmt(msg, "recordState", "%u", rec->state);
+ ret |= ldb_msg_add_fmt(msg, "nodeType", "%u", rec->node);
+ ret |= ldb_msg_add_fmt(msg, "isStatic", "%u", rec->is_static);
+ ret |= ldb_msg_add_empty(msg, "expireTime", 0);
+ if (!(rec->is_static && rec->state == WREPL_STATE_ACTIVE)) {
+ ret |= ldb_msg_add_string(msg, "expireTime", expire_time);
+ }
+ ret |= ldb_msg_add_fmt(msg, "versionID", "%llu", (long long)rec->version);
+ ret |= ldb_msg_add_string(msg, "winsOwner", rec->wins_owner);
+ ret |= ldb_msg_add_empty(msg, "address", 0);
for (i=0;rec->addresses[i];i++) {
- ret |= ldb_msg_add_string(msg, "address", rec->addresses[i]);
+ ret |= ldb_msg_add_winsdb_addr(msg, rec, "address", rec->addresses[i]);
+ }
+ ret |= ldb_msg_add_empty(msg, "registeredBy", 0);
+ if (rec->registered_by) {
+ ret |= ldb_msg_add_string(msg, "registeredBy", rec->registered_by);
+ if (ret != 0) goto failed;
}
- if (ret != 0) goto failed;
return msg;
failed:
/*
save a WINS record into the database
*/
-uint8_t winsdb_add(struct wins_server *winssrv, struct winsdb_record *rec)
+uint8_t winsdb_add(struct winsdb_handle *h, struct winsdb_record *rec, uint32_t flags)
{
- struct ldb_context *ldb = winssrv->wins_db;
struct ldb_message *msg;
- TALLOC_CTX *tmp_ctx = talloc_new(winssrv);
+ struct ldb_context *wins_db = h->ldb;
+ TALLOC_CTX *tmp_ctx = talloc_new(wins_db);
int trans = -1;
int ret = 0;
-
- trans = ldb_transaction_start(ldb);
+ trans = ldb_transaction_start(wins_db);
if (trans != LDB_SUCCESS) goto failed;
- rec->version = winsdb_allocate_version(winssrv);
- if (rec->version == 0) goto failed;
+ if (flags & WINSDB_FLAG_ALLOC_VERSION) {
+ /* passing '0' means auto-allocate a new one */
+ rec->version = winsdb_set_maxVersion(h, 0);
+ if (rec->version == 0) goto failed;
+ }
+ if (flags & WINSDB_FLAG_TAKE_OWNERSHIP) {
+ rec->wins_owner = h->local_owner;
+ }
- msg = winsdb_message(winssrv, rec, tmp_ctx);
+ msg = winsdb_message(wins_db, rec, tmp_ctx);
if (msg == NULL) goto failed;
- ret = ldb_add(ldb, msg);
+ ret = ldb_add(wins_db, msg);
if (ret != 0) goto failed;
- trans = ldb_transaction_commit(ldb);
+ trans = ldb_transaction_commit(wins_db);
if (trans != LDB_SUCCESS) goto failed;
+ wins_hook(h, rec, WINS_HOOK_ADD);
+
talloc_free(tmp_ctx);
return NBT_RCODE_OK;
failed:
- if (trans == LDB_SUCCESS) ldb_transaction_cancel(ldb);
+ if (trans == LDB_SUCCESS) ldb_transaction_cancel(wins_db);
talloc_free(tmp_ctx);
return NBT_RCODE_SVR;
}
/*
modify a WINS record in the database
*/
-uint8_t winsdb_modify(struct wins_server *winssrv, struct winsdb_record *rec)
+uint8_t winsdb_modify(struct winsdb_handle *h, struct winsdb_record *rec, uint32_t flags)
{
- struct ldb_context *ldb = winssrv->wins_db;
struct ldb_message *msg;
- TALLOC_CTX *tmp_ctx = talloc_new(winssrv);
+ struct ldb_context *wins_db = h->ldb;
+ TALLOC_CTX *tmp_ctx = talloc_new(wins_db);
int trans;
int ret;
int i;
- trans = ldb_transaction_start(ldb);
+ trans = ldb_transaction_start(wins_db);
if (trans != LDB_SUCCESS) goto failed;
- rec->version = winsdb_allocate_version(winssrv);
- if (rec->version == 0) goto failed;
+ if (flags & WINSDB_FLAG_ALLOC_VERSION) {
+ /* passing '0' means auto-allocate a new one */
+ rec->version = winsdb_set_maxVersion(h, 0);
+ if (rec->version == 0) goto failed;
+ }
+ if (flags & WINSDB_FLAG_TAKE_OWNERSHIP) {
+ rec->wins_owner = h->local_owner;
+ }
- msg = winsdb_message(winssrv, rec, tmp_ctx);
+ msg = winsdb_message(wins_db, rec, tmp_ctx);
if (msg == NULL) goto failed;
for (i=0;i<msg->num_elements;i++) {
msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
}
- ret = ldb_modify(ldb, msg);
+ ret = ldb_modify(wins_db, msg);
if (ret != 0) goto failed;
- trans = ldb_transaction_commit(ldb);
+ trans = ldb_transaction_commit(wins_db);
if (trans != LDB_SUCCESS) goto failed;
+ wins_hook(h, rec, WINS_HOOK_MODIFY);
+
talloc_free(tmp_ctx);
return NBT_RCODE_OK;
failed:
- if (trans == LDB_SUCCESS) ldb_transaction_cancel(ldb);
+ if (trans == LDB_SUCCESS) ldb_transaction_cancel(wins_db);
talloc_free(tmp_ctx);
return NBT_RCODE_SVR;
}
/*
delete a WINS record from the database
*/
-uint8_t winsdb_delete(struct wins_server *winssrv, struct winsdb_record *rec)
+uint8_t winsdb_delete(struct winsdb_handle *h, struct winsdb_record *rec)
{
- struct ldb_context *ldb = winssrv->wins_db;
- TALLOC_CTX *tmp_ctx = talloc_new(winssrv);
+ struct ldb_context *wins_db = h->ldb;
+ TALLOC_CTX *tmp_ctx = talloc_new(wins_db);
const struct ldb_dn *dn;
int trans;
int ret;
- trans = ldb_transaction_start(ldb);
+ trans = ldb_transaction_start(wins_db);
if (trans != LDB_SUCCESS) goto failed;
- if(!winsdb_remove_version(winssrv, rec->version))
- goto failed;
-
dn = winsdb_dn(tmp_ctx, rec->name);
if (dn == NULL) goto failed;
- ret = ldb_delete(ldb, dn);
+ ret = ldb_delete(wins_db, dn);
if (ret != 0) goto failed;
- trans = ldb_transaction_commit(ldb);
+ trans = ldb_transaction_commit(wins_db);
if (trans != LDB_SUCCESS) goto failed;
+ wins_hook(h, rec, WINS_HOOK_DELETE);
+
talloc_free(tmp_ctx);
return NBT_RCODE_OK;
failed:
- if (trans == LDB_SUCCESS) ldb_transaction_cancel(ldb);
+ if (trans == LDB_SUCCESS) ldb_transaction_cancel(wins_db);
talloc_free(tmp_ctx);
return NBT_RCODE_SVR;
}
-struct ldb_context *winsdb_connect(TALLOC_CTX *mem_ctx)
+static BOOL winsdb_check_or_add_module_list(struct winsdb_handle *h)
+{
+ int trans;
+ int ret;
+ struct ldb_dn *dn;
+ struct ldb_result *res = NULL;
+ struct ldb_message *msg = NULL;
+ TALLOC_CTX *tmp_ctx = talloc_new(h);
+ unsigned int flags = 0;
+
+ trans = ldb_transaction_start(h->ldb);
+ if (trans != LDB_SUCCESS) goto failed;
+
+ /* check if we have a special @MODULES record already */
+ dn = ldb_dn_explode(tmp_ctx, "@MODULES");
+ if (!dn) goto failed;
+
+ /* find the record in the WINS database */
+ ret = ldb_search(h->ldb, dn, LDB_SCOPE_BASE, NULL, NULL, &res);
+ if (ret != LDB_SUCCESS) goto failed;
+ talloc_steal(tmp_ctx, res);
+
+ if (res->count > 0) goto skip;
+
+ /* if there's no record, add one */
+ msg = ldb_msg_new(tmp_ctx);
+ if (!msg) goto failed;
+ msg->dn = dn;
+
+ ret = ldb_msg_add_string(msg, "@LIST", "wins_ldb");
+ if (ret != 0) goto failed;
+
+ ret = ldb_add(h->ldb, msg);
+ if (ret != 0) goto failed;
+
+ trans = ldb_transaction_commit(h->ldb);
+ if (trans != LDB_SUCCESS) goto failed;
+
+ /* close and reopen the database, with the modules */
+ trans = LDB_ERR_OTHER;
+ talloc_free(h->ldb);
+ h->ldb = NULL;
+
+ if (lp_parm_bool(-1,"winsdb", "nosync", False)) {
+ flags |= LDB_FLG_NOSYNC;
+ }
+
+ h->ldb = ldb_wrap_connect(h, lock_path(h, lp_wins_url()),
+ NULL, NULL, flags, NULL);
+ if (!h->ldb) goto failed;
+
+ talloc_free(tmp_ctx);
+ return True;
+
+skip:
+ if (trans == LDB_SUCCESS) ldb_transaction_cancel(h->ldb);
+ talloc_free(tmp_ctx);
+ return True;
+
+failed:
+ if (trans == LDB_SUCCESS) ldb_transaction_cancel(h->ldb);
+ talloc_free(tmp_ctx);
+ return False;
+}
+
+struct winsdb_handle *winsdb_connect(TALLOC_CTX *mem_ctx, enum winsdb_handle_caller caller)
{
- return ldb_wrap_connect(mem_ctx, lp_wins_url(), 0, NULL);
+ struct winsdb_handle *h = NULL;
+ const char *owner;
+ unsigned int flags = 0;
+ BOOL ret;
+ int ldb_err;
+
+ h = talloc(mem_ctx, struct winsdb_handle);
+ if (!h) return NULL;
+
+ if (lp_parm_bool(-1,"winsdb", "nosync", False)) {
+ flags |= LDB_FLG_NOSYNC;
+ }
+
+ h->ldb = ldb_wrap_connect(h, lock_path(h, lp_wins_url()),
+ NULL, NULL, flags, NULL);
+ if (!h->ldb) goto failed;
+
+ h->caller = caller;
+
+ owner = lp_parm_string(-1, "winsdb", "local_owner");
+ if (!owner) {
+ owner = iface_n_ip(0);
+ }
+
+ h->local_owner = talloc_strdup(h, owner);
+ if (!h->local_owner) goto failed;
+
+ /* make sure the module list is available and used */
+ ret = winsdb_check_or_add_module_list(h);
+ if (!ret) goto failed;
+
+ ldb_err = ldb_set_opaque(h->ldb, "winsdb_handle", h);
+ if (ldb_err != LDB_SUCCESS) goto failed;
+
+ return h;
+failed:
+ talloc_free(h);
+ return NULL;
}