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-rw-r--r--source4/nbt_server/wins/winsdb.c82
1 files changed, 73 insertions, 9 deletions
diff --git a/source4/nbt_server/wins/winsdb.c b/source4/nbt_server/wins/winsdb.c
index 9131a70c07..e64ebdd60a 100644
--- a/source4/nbt_server/wins/winsdb.c
+++ b/source4/nbt_server/wins/winsdb.c
@@ -29,10 +29,39 @@
#include "system/time.h"
#include "auth/auth.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 winsdb_handle *h)
+uint64_t winsdb_set_maxVersion(struct winsdb_handle *h, uint64_t newMaxVersion)
{
int trans;
int ret;
@@ -41,7 +70,7 @@ static uint64_t winsdb_allocate_version(struct winsdb_handle *h)
struct ldb_message *msg = NULL;
struct ldb_context *wins_db = h->ldb;
TALLOC_CTX *tmp_ctx = talloc_new(wins_db);
- uint64_t maxVersion = 0;
+ uint64_t oldMaxVersion = 0;
trans = ldb_transaction_start(wins_db);
if (trans != LDB_SUCCESS) goto failed;
@@ -58,9 +87,14 @@ static uint64_t winsdb_allocate_version(struct winsdb_handle *h)
talloc_steal(tmp_ctx, res);
if (res->count == 1) {
- maxVersion = ldb_msg_find_uint64(res->msgs[0], "maxVersion", 0);
+ oldMaxVersion = ldb_msg_find_uint64(res->msgs[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;
@@ -73,7 +107,7 @@ static uint64_t winsdb_allocate_version(struct winsdb_handle *h)
if (ret != 0) goto failed;
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)maxVersion);
+ ret = ldb_msg_add_fmt(msg, "maxVersion", "%llu", (long long)newMaxVersion);
if (ret != 0) goto failed;
ret = ldb_modify(wins_db, msg);
@@ -84,7 +118,7 @@ static uint64_t winsdb_allocate_version(struct winsdb_handle *h)
if (trans != LDB_SUCCESS) goto failed;
talloc_free(tmp_ctx);
- return maxVersion;
+ return newMaxVersion;
failed:
if (trans == LDB_SUCCESS) ldb_transaction_cancel(wins_db);
@@ -92,6 +126,34 @@ failed:
return 0;
}
+uint64_t winsdb_get_seqnumber(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 seqnumber = 0;
+
+ 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);
+ }
+
+failed:
+ talloc_free(tmp_ctx);
+ return seqnumber;
+}
+
/*
return a DN for a nbt_name
*/
@@ -595,7 +657,8 @@ uint8_t winsdb_add(struct winsdb_handle *h, struct winsdb_record *rec, uint32_t
if (trans != LDB_SUCCESS) goto failed;
if (flags & WINSDB_FLAG_ALLOC_VERSION) {
- rec->version = winsdb_allocate_version(h);
+ /* 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) {
@@ -636,7 +699,8 @@ uint8_t winsdb_modify(struct winsdb_handle *h, struct winsdb_record *rec, uint32
if (trans != LDB_SUCCESS) goto failed;
if (flags & WINSDB_FLAG_ALLOC_VERSION) {
- rec->version = winsdb_allocate_version(h);
+ /* 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) {