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/*
Unix SMB/CIFS implementation.
Low-level connections.tdb access functions
Copyright (C) Volker Lendecke 2007
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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "system/filesys.h"
#include "smbd/globals.h"
#include "dbwrap/dbwrap.h"
#include "dbwrap/dbwrap_open.h"
#include "messages.h"
#include "lib/conn_tdb.h"
static struct db_context *connections_db_ctx(bool rw)
{
static struct db_context *db_ctx;
int open_flags;
if (db_ctx != NULL) {
return db_ctx;
}
open_flags = rw ? (O_RDWR|O_CREAT) : O_RDONLY;
db_ctx = db_open(NULL, lock_path("connections.tdb"), 0,
TDB_CLEAR_IF_FIRST|TDB_INCOMPATIBLE_HASH|TDB_DEFAULT,
open_flags, 0644, DBWRAP_LOCK_ORDER_1);
return db_ctx;
}
static struct db_record *connections_fetch_record(TALLOC_CTX *mem_ctx,
TDB_DATA key)
{
struct db_context *ctx = connections_db_ctx(True);
if (ctx == NULL) {
return NULL;
}
return dbwrap_fetch_locked(ctx, mem_ctx, key);
}
struct db_record *connections_fetch_entry_ext(TALLOC_CTX *mem_ctx,
struct server_id id,
int cnum,
const char *name)
{
struct connections_key ckey;
TDB_DATA key;
ZERO_STRUCT(ckey);
ckey.pid = id;
ckey.cnum = cnum;
strlcpy(ckey.name, name, sizeof(ckey.name));
key.dsize = sizeof(ckey);
key.dptr = (uint8 *)&ckey;
return connections_fetch_record(mem_ctx, key);
}
struct db_record *connections_fetch_entry(TALLOC_CTX *mem_ctx,
connection_struct *conn,
const char *name)
{
struct server_id id = messaging_server_id(conn->sconn->msg_ctx);
return connections_fetch_entry_ext(mem_ctx, id, conn->cnum, name);
}
struct conn_traverse_state {
int (*fn)(struct db_record *rec,
const struct connections_key *key,
const struct connections_data *data,
void *private_data);
void *private_data;
};
static int conn_traverse_fn(struct db_record *rec, void *private_data)
{
TDB_DATA key;
TDB_DATA value;
struct conn_traverse_state *state =
(struct conn_traverse_state *)private_data;
key = dbwrap_record_get_key(rec);
value = dbwrap_record_get_value(rec);
if ((key.dsize != sizeof(struct connections_key))
|| (value.dsize != sizeof(struct connections_data))) {
return 0;
}
return state->fn(rec, (const struct connections_key *)key.dptr,
(const struct connections_data *)value.dptr,
state->private_data);
}
int connections_forall(int (*fn)(struct db_record *rec,
const struct connections_key *key,
const struct connections_data *data,
void *private_data),
void *private_data)
{
struct db_context *ctx;
struct conn_traverse_state state;
NTSTATUS status;
int count;
ctx = connections_db_ctx(true);
if (ctx == NULL) {
return -1;
}
state.fn = fn;
state.private_data = private_data;
status = dbwrap_traverse(ctx, conn_traverse_fn, (void *)&state, &count);
if (!NT_STATUS_IS_OK(status)) {
return -1;
}
return count;
}
struct conn_traverse_read_state {
int (*fn)(const struct connections_key *key,
const struct connections_data *data,
void *private_data);
void *private_data;
};
static int connections_forall_read_fn(struct db_record *rec,
void *private_data)
{
TDB_DATA key;
TDB_DATA value;
struct conn_traverse_read_state *state =
(struct conn_traverse_read_state *)private_data;
key = dbwrap_record_get_key(rec);
value = dbwrap_record_get_value(rec);
if ((key.dsize != sizeof(struct connections_key))
|| (value.dsize != sizeof(struct connections_data))) {
return 0;
}
return state->fn((const struct connections_key *)key.dptr,
(const struct connections_data *)value.dptr,
state->private_data);
}
int connections_forall_read(int (*fn)(const struct connections_key *key,
const struct connections_data *data,
void *private_data),
void *private_data)
{
struct db_context *ctx;
struct conn_traverse_read_state state;
NTSTATUS status;
int count;
ctx = connections_db_ctx(false);
if (ctx == NULL) {
return -1;
}
state.fn = fn;
state.private_data = private_data;
status = dbwrap_traverse_read(ctx, connections_forall_read_fn,
(void *)&state, &count);
if (!NT_STATUS_IS_OK(status)) {
return -1;
}
return count;
}
bool connections_init(bool rw)
{
return (connections_db_ctx(rw) != NULL);
}
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