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DEFINITIONS
This source file includes following definitions.
- smbsrv_init_sessions
- smbsrv_session_find
- smbsrv_session_find_sesssetup
- smbsrv_session_sesssetup_finished
- smbsrv_session_destructor
- smbsrv_session_new
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 #include "../lib/util/dlinklist.h"
25
26
27 /*
28 * init the sessions structures
29 */
30 NTSTATUS smbsrv_init_sessions(struct smbsrv_connection *smb_conn, uint64_t limit)
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31 {
32 /*
33 * the idr_* functions take 'int' as limit,
34 * and only work with a max limit 0x00FFFFFF
35 */
36 limit &= 0x00FFFFFF;
37
38 smb_conn->sessions.idtree_vuid = idr_init(smb_conn);
39 NT_STATUS_HAVE_NO_MEMORY(smb_conn->sessions.idtree_vuid);
40 smb_conn->sessions.idtree_limit = limit;
41 smb_conn->sessions.list = NULL;
42
43 return NT_STATUS_OK;
44 }
45
46 /*
47 * Find the session structure assoicated with a VUID
48 * (not one from an in-progress session setup)
49 */
50 struct smbsrv_session *smbsrv_session_find(struct smbsrv_connection *smb_conn,
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51 uint64_t vuid, struct timeval request_time)
52 {
53 void *p;
54 struct smbsrv_session *sess;
55
56 if (vuid == 0) return NULL;
57
58 if (vuid > smb_conn->sessions.idtree_limit) return NULL;
59
60 p = idr_find(smb_conn->sessions.idtree_vuid, vuid);
61 if (!p) return NULL;
62
63 /* only return a finished session */
64 sess = talloc_get_type(p, struct smbsrv_session);
65 if (sess && sess->session_info) {
66 sess->statistics.last_request_time = request_time;
67 return sess;
68 }
69
70 return NULL;
71 }
72
73 /*
74 * Find the session structure assoicated with a VUID
75 * (assoicated with an in-progress session setup)
76 */
77 struct smbsrv_session *smbsrv_session_find_sesssetup(struct smbsrv_connection *smb_conn, uint64_t vuid)
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78 {
79 void *p;
80 struct smbsrv_session *sess;
81
82 if (vuid == 0) return NULL;
83
84 if (vuid > smb_conn->sessions.idtree_limit) return NULL;
85
86 p = idr_find(smb_conn->sessions.idtree_vuid, vuid);
87 if (!p) return NULL;
88
89 /* only return an unfinished session */
90 sess = talloc_get_type(p, struct smbsrv_session);
91 if (sess && !sess->session_info) {
92 return sess;
93 }
94 return NULL;
95 }
96
97 /*
98 * the session will be marked as valid for usage
99 * by attaching a auth_session_info to the session.
100 *
101 * session_info will be talloc_stealed
102 */
103 NTSTATUS smbsrv_session_sesssetup_finished(struct smbsrv_session *sess,
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104 struct auth_session_info *session_info)
105 {
106 /* this check is to catch programmer errors */
107 if (!session_info) {
108 talloc_free(sess);
109 return NT_STATUS_ACCESS_DENIED;
110 }
111
112 /* mark the session as successful authenticated */
113 sess->session_info = talloc_steal(sess, session_info);
114
115 /* now fill in some statistics */
116 sess->statistics.auth_time = timeval_current();
117
118 return NT_STATUS_OK;
119 }
120
121 /****************************************************************************
122 destroy a session structure
123 ****************************************************************************/
124 static int smbsrv_session_destructor(struct smbsrv_session *sess)
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125 {
126 struct smbsrv_connection *smb_conn = sess->smb_conn;
127
128 idr_remove(smb_conn->sessions.idtree_vuid, sess->vuid);
129 DLIST_REMOVE(smb_conn->sessions.list, sess);
130 return 0;
131 }
132
133 /*
134 * allocate a new session structure with a VUID.
135 * gensec_ctx is optional, but talloc_steal'ed when present
136 */
137 struct smbsrv_session *smbsrv_session_new(struct smbsrv_connection *smb_conn,
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138 TALLOC_CTX *mem_ctx,
139 struct gensec_security *gensec_ctx)
140 {
141 struct smbsrv_session *sess = NULL;
142 int i;
143
144 /* Ensure no vuid gets registered in share level security. */
145 if (smb_conn->config.security == SEC_SHARE) return NULL;
146
147 sess = talloc_zero(mem_ctx, struct smbsrv_session);
148 if (!sess) return NULL;
149 sess->smb_conn = smb_conn;
150
151 i = idr_get_new_random(smb_conn->sessions.idtree_vuid, sess, smb_conn->sessions.idtree_limit);
152 if (i == -1) {
153 DEBUG(1,("ERROR! Out of connection structures\n"));
154 talloc_free(sess);
155 return NULL;
156 }
157 sess->vuid = i;
158
159 /* use this to keep tabs on all our info from the authentication */
160 sess->gensec_ctx = talloc_steal(sess, gensec_ctx);
161
162 DLIST_ADD(smb_conn->sessions.list, sess);
163 talloc_set_destructor(sess, smbsrv_session_destructor);
164
165 /* now fill in some statistics */
166 sess->statistics.connect_time = timeval_current();
167
168 return sess;
169 }