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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 "dbwrap/dbwrap_rbt.h"
#include "messages.h"
#include "lib/conn_tdb.h"
#include "util_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 connections_forall_state {
struct db_context *session_by_pid;
int (*fn)(const struct connections_key *key,
const struct connections_data *data,
void *private_data);
void *private_data;
int count;
};
struct connections_forall_session {
uid_t uid;
gid_t gid;
char machine[FSTRING_LEN];
char addr[FSTRING_LEN];
};
static int collect_sessions_fn(struct smbXsrv_session_global0 *global,
void *connections_forall_state)
{
NTSTATUS status;
struct connections_forall_state *state =
(struct connections_forall_state*)connections_forall_state;
uint32_t id = global->session_global_id;
struct connections_forall_session sess;
sess.uid = global->auth_session_info->unix_token->uid;
sess.gid = global->auth_session_info->unix_token->gid;
strncpy(sess.machine, global->channels[0].remote_name, sizeof(sess.machine));
strncpy(sess.addr, global->channels[0].remote_address, sizeof(sess.addr));
status = dbwrap_store(state->session_by_pid,
make_tdb_data((void*)&id, sizeof(id)),
make_tdb_data((void*)&sess, sizeof(sess)),
TDB_INSERT);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to store record: %s\n", nt_errstr(status)));
}
return 0;
}
static int traverse_tcon_fn(struct smbXsrv_tcon_global0 *global,
void *connections_forall_state)
{
NTSTATUS status;
struct connections_forall_state *state =
(struct connections_forall_state*)connections_forall_state;
struct connections_key key;
struct connections_data data;
uint32_t sess_id = global->session_global_id;
struct connections_forall_session sess = {
.uid = -1,
.gid = -1,
};
TDB_DATA val = tdb_null;
status = dbwrap_fetch(state->session_by_pid, state,
make_tdb_data((void*)&sess_id, sizeof(sess_id)),
&val);
if (NT_STATUS_IS_OK(status)) {
memcpy((uint8_t *)&sess, val.dptr, val.dsize);
}
ZERO_STRUCT(key);
ZERO_STRUCT(data);
key.pid = data.pid = global->server_id;
key.cnum = data.cnum = global->tcon_global_id;
strncpy(key.name, global->share_name, sizeof(key.name));
strncpy(data.servicename, global->share_name, sizeof(data.servicename));
data.uid = sess.uid;
data.gid = sess.gid;
strncpy(data.addr, sess.addr, sizeof(data.addr));
strncpy(data.machine, sess.machine, sizeof(data.machine));
data.start = nt_time_to_unix(global->creation_time);
state->count++;
return state->fn(&key, &data, 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)
{
TALLOC_CTX *frame = talloc_stackframe();
struct connections_forall_state *state =
talloc_zero(talloc_tos(), struct connections_forall_state);
NTSTATUS status;
int ret = -1;
state->session_by_pid = db_open_rbt(state);
state->fn = fn;
state->private_data = private_data;
status = smbXsrv_session_global_traverse(collect_sessions_fn, state);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to traverse sessions: %s\n",
nt_errstr(status)));
goto done;
}
status = smbXsrv_tcon_global_traverse(traverse_tcon_fn, state);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to traverse tree connects: %s\n",
nt_errstr(status)));
goto done;
}
ret = state->count;
done:
talloc_free(frame);
return ret;
}
bool connections_init(bool rw)
{
return (connections_db_ctx(rw) != NULL);
}
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