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/*
Unix SMB/CIFS implementation.
Password and authentication handling
Copyright (C) Andrew Tridgell 1992-2005
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
Copyright (C) Stefan Metzmacher 2005-2006
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 "smb_server/smb_server.h"
#include "lib/util/dlinklist.h"
/*
* init the sessions structures
*/
NTSTATUS smbsrv_init_sessions(struct smbsrv_connection *smb_conn, uint64_t limit)
{
/*
* the idr_* functions take 'int' as limit,
* and only work with a max limit 0x00FFFFFF
*/
limit &= 0x00FFFFFF;
smb_conn->sessions.idtree_vuid = idr_init(smb_conn);
NT_STATUS_HAVE_NO_MEMORY(smb_conn->sessions.idtree_vuid);
smb_conn->sessions.idtree_limit = limit;
smb_conn->sessions.list = NULL;
return NT_STATUS_OK;
}
/*
* Find the session structure assoicated with a VUID
* (not one from an in-progress session setup)
*/
struct smbsrv_session *smbsrv_session_find(struct smbsrv_connection *smb_conn,
uint64_t vuid, struct timeval request_time)
{
void *p;
struct smbsrv_session *sess;
if (vuid == 0) return NULL;
if (vuid > smb_conn->sessions.idtree_limit) return NULL;
p = idr_find(smb_conn->sessions.idtree_vuid, vuid);
if (!p) return NULL;
/* only return a finished session */
sess = talloc_get_type(p, struct smbsrv_session);
if (sess && sess->session_info) {
sess->statistics.last_request_time = request_time;
return sess;
}
return NULL;
}
/*
* Find the session structure assoicated with a VUID
* (assoicated with an in-progress session setup)
*/
struct smbsrv_session *smbsrv_session_find_sesssetup(struct smbsrv_connection *smb_conn, uint64_t vuid)
{
void *p;
struct smbsrv_session *sess;
if (vuid == 0) return NULL;
if (vuid > smb_conn->sessions.idtree_limit) return NULL;
p = idr_find(smb_conn->sessions.idtree_vuid, vuid);
if (!p) return NULL;
/* only return an unfinished session */
sess = talloc_get_type(p, struct smbsrv_session);
if (sess && !sess->session_info) {
return sess;
}
return NULL;
}
/*
* the session will be marked as valid for usage
* by attaching a auth_session_info to the session.
*
* session_info will be talloc_stealed
*/
NTSTATUS smbsrv_session_sesssetup_finished(struct smbsrv_session *sess,
struct auth_session_info *session_info)
{
/* this check is to catch programmer errors */
if (!session_info) {
talloc_free(sess);
return NT_STATUS_ACCESS_DENIED;
}
/* mark the session as successful authenticated */
sess->session_info = talloc_steal(sess, session_info);
/* now fill in some statistics */
sess->statistics.auth_time = timeval_current();
return NT_STATUS_OK;
}
/****************************************************************************
destroy a session structure
****************************************************************************/
static int smbsrv_session_destructor(struct smbsrv_session *sess)
{
struct smbsrv_connection *smb_conn = sess->smb_conn;
idr_remove(smb_conn->sessions.idtree_vuid, sess->vuid);
DLIST_REMOVE(smb_conn->sessions.list, sess);
return 0;
}
/*
* allocate a new session structure with a VUID.
* gensec_ctx is optional, but talloc_steal'ed when present
*/
struct smbsrv_session *smbsrv_session_new(struct smbsrv_connection *smb_conn,
TALLOC_CTX *mem_ctx,
struct gensec_security *gensec_ctx)
{
struct smbsrv_session *sess = NULL;
int i;
/* Ensure no vuid gets registered in share level security. */
if (smb_conn->config.security == SEC_SHARE) return NULL;
sess = talloc_zero(mem_ctx, struct smbsrv_session);
if (!sess) return NULL;
sess->smb_conn = smb_conn;
i = idr_get_new_random(smb_conn->sessions.idtree_vuid, sess, smb_conn->sessions.idtree_limit);
if (i == -1) {
DEBUG(1,("ERROR! Out of connection structures\n"));
talloc_free(sess);
return NULL;
}
sess->vuid = i;
/* use this to keep tabs on all our info from the authentication */
sess->gensec_ctx = talloc_steal(sess, gensec_ctx);
DLIST_ADD(smb_conn->sessions.list, sess);
talloc_set_destructor(sess, smbsrv_session_destructor);
/* now fill in some statistics */
sess->statistics.connect_time = timeval_current();
return sess;
}
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