s3-lib: fix segf while reading incomplete session info (bug #10003)
[sfrench/samba-autobuild/.git] / source3 / lib / sessionid_tdb.c
1 /*
2    Unix SMB/CIFS implementation.
3    Low-level sessionid.tdb access functions
4    Copyright (C) Volker Lendecke 2010
5
6    This program is free software; you can redistribute it and/or modify
7    it under the terms of the GNU General Public License as published by
8    the Free Software Foundation; either version 3 of the License, or
9    (at your option) any later version.
10
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15
16    You should have received a copy of the GNU General Public License
17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "includes.h"
21 #include "system/filesys.h"
22 #include "dbwrap/dbwrap.h"
23 #include "dbwrap/dbwrap_open.h"
24 #include "session.h"
25 #include "util_tdb.h"
26 #include "smbd/globals.h"
27
28 struct sessionid_traverse_read_state {
29         int (*fn)(const char *key, struct sessionid *session,
30                   void *private_data);
31         void *private_data;
32 };
33
34 static int sessionid_traverse_read_fn(struct smbXsrv_session_global0 *global,
35                                       void *private_data)
36 {
37         struct sessionid_traverse_read_state *state =
38                 (struct sessionid_traverse_read_state *)private_data;
39         struct auth_session_info *session_info = global->auth_session_info;
40         struct sessionid session = {
41                 .uid = -1,
42                 .gid = -1,
43                 .id_num = global->session_global_id,
44                 .connect_start = nt_time_to_unix(global->creation_time),
45                 .pid = global->channels[0].server_id,
46         };
47
48         if (session_info != NULL) {
49                 session.uid = session_info->unix_token->uid;
50                 session.gid = session_info->unix_token->gid;
51                 strncpy(session.username,
52                         session_info->unix_info->unix_name,
53                         sizeof(fstring)-1);
54         }
55
56         strncpy(session.remote_machine,
57                 global->channels[0].remote_name,
58                 sizeof(fstring)-1);
59         strncpy(session.hostname,
60                 global->channels[0].remote_address,
61                 sizeof(fstring)-1);
62         strncpy(session.netbios_name,
63                 global->channels[0].remote_name,
64                 sizeof(fstring)-1);
65         snprintf(session.id_str, sizeof(fstring)-1,
66                  "smb/%u", global->session_global_id);
67         strncpy(session.ip_addr_str,
68                 global->channels[0].remote_address,
69                 sizeof(fstring)-1);
70
71         return state->fn(NULL, &session, state->private_data);
72 }
73
74 NTSTATUS sessionid_traverse_read(int (*fn)(const char *key,
75                                           struct sessionid *session,
76                                           void *private_data),
77                                  void *private_data)
78 {
79         struct sessionid_traverse_read_state state;
80         NTSTATUS status;
81
82         state.fn = fn;
83         state.private_data = private_data;
84         status = smbXsrv_session_global_traverse(sessionid_traverse_read_fn,
85                                                  &state);
86
87         return status;
88 }