source: vendor/3.5.7/source4/smb_server/session.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 4.7 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Andrew Tridgell 1992-2005
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
6 Copyright (C) Stefan Metzmacher 2005-2006
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20*/
21
22#include "includes.h"
23#include "smb_server/smb_server.h"
24
25
26/*
27 * init the sessions structures
28 */
29NTSTATUS smbsrv_init_sessions(struct smbsrv_connection *smb_conn, uint64_t limit)
30{
31 /*
32 * the idr_* functions take 'int' as limit,
33 * and only work with a max limit 0x00FFFFFF
34 */
35 limit &= 0x00FFFFFF;
36
37 smb_conn->sessions.idtree_vuid = idr_init(smb_conn);
38 NT_STATUS_HAVE_NO_MEMORY(smb_conn->sessions.idtree_vuid);
39 smb_conn->sessions.idtree_limit = limit;
40 smb_conn->sessions.list = NULL;
41
42 return NT_STATUS_OK;
43}
44
45/*
46 * Find the session structure assoicated with a VUID
47 * (not one from an in-progress session setup)
48 */
49struct smbsrv_session *smbsrv_session_find(struct smbsrv_connection *smb_conn,
50 uint64_t vuid, struct timeval request_time)
51{
52 void *p;
53 struct smbsrv_session *sess;
54
55 if (vuid == 0) return NULL;
56
57 if (vuid > smb_conn->sessions.idtree_limit) return NULL;
58
59 p = idr_find(smb_conn->sessions.idtree_vuid, vuid);
60 if (!p) return NULL;
61
62 /* only return a finished session */
63 sess = talloc_get_type(p, struct smbsrv_session);
64 if (sess && sess->session_info) {
65 sess->statistics.last_request_time = request_time;
66 return sess;
67 }
68
69 return NULL;
70}
71
72/*
73 * Find the session structure assoicated with a VUID
74 * (assoicated with an in-progress session setup)
75 */
76struct smbsrv_session *smbsrv_session_find_sesssetup(struct smbsrv_connection *smb_conn, uint64_t vuid)
77{
78 void *p;
79 struct smbsrv_session *sess;
80
81 if (vuid == 0) return NULL;
82
83 if (vuid > smb_conn->sessions.idtree_limit) return NULL;
84
85 p = idr_find(smb_conn->sessions.idtree_vuid, vuid);
86 if (!p) return NULL;
87
88 /* only return an unfinished session */
89 sess = talloc_get_type(p, struct smbsrv_session);
90 if (sess && !sess->session_info) {
91 return sess;
92 }
93 return NULL;
94}
95
96/*
97 * the session will be marked as valid for usage
98 * by attaching a auth_session_info to the session.
99 *
100 * session_info will be talloc_stealed
101 */
102NTSTATUS smbsrv_session_sesssetup_finished(struct smbsrv_session *sess,
103 struct auth_session_info *session_info)
104{
105 /* this check is to catch programmer errors */
106 if (!session_info) {
107 talloc_free(sess);
108 return NT_STATUS_ACCESS_DENIED;
109 }
110
111 /* mark the session as successful authenticated */
112 sess->session_info = talloc_steal(sess, session_info);
113
114 /* now fill in some statistics */
115 sess->statistics.auth_time = timeval_current();
116
117 return NT_STATUS_OK;
118}
119
120/****************************************************************************
121destroy a session structure
122****************************************************************************/
123static int smbsrv_session_destructor(struct smbsrv_session *sess)
124{
125 struct smbsrv_connection *smb_conn = sess->smb_conn;
126
127 idr_remove(smb_conn->sessions.idtree_vuid, sess->vuid);
128 DLIST_REMOVE(smb_conn->sessions.list, sess);
129 return 0;
130}
131
132/*
133 * allocate a new session structure with a VUID.
134 * gensec_ctx is optional, but talloc_steal'ed when present
135 */
136struct smbsrv_session *smbsrv_session_new(struct smbsrv_connection *smb_conn,
137 TALLOC_CTX *mem_ctx,
138 struct gensec_security *gensec_ctx)
139{
140 struct smbsrv_session *sess = NULL;
141 int i;
142
143 /* Ensure no vuid gets registered in share level security. */
144 if (smb_conn->config.security == SEC_SHARE) return NULL;
145
146 sess = talloc_zero(mem_ctx, struct smbsrv_session);
147 if (!sess) return NULL;
148 sess->smb_conn = smb_conn;
149
150 i = idr_get_new_random(smb_conn->sessions.idtree_vuid, sess, smb_conn->sessions.idtree_limit);
151 if (i == -1) {
152 DEBUG(1,("ERROR! Out of connection structures\n"));
153 talloc_free(sess);
154 return NULL;
155 }
156 sess->vuid = i;
157
158 /* use this to keep tabs on all our info from the authentication */
159 sess->gensec_ctx = talloc_steal(sess, gensec_ctx);
160
161 DLIST_ADD(smb_conn->sessions.list, sess);
162 talloc_set_destructor(sess, smbsrv_session_destructor);
163
164 /* now fill in some statistics */
165 sess->statistics.connect_time = timeval_current();
166
167 return sess;
168}
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