2 Unix SMB/Netbios implementation.
4 session handling for utmp and PAM
5 Copyright (C) tridge@samba.org 2001
6 Copyright (C) abartlet@pcug.org.au 2001
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 2 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 /* a "session" is claimed when we do a SessionSetupX operation
24 and is yielded when the corresponding vuid is destroyed.
26 sessions are used to populate utmp and PAM session structures
31 #if defined(WITH_PAM) || defined(WITH_UTMP)
33 static TDB_CONTEXT *tdb;
42 /* called when a session is created */
43 BOOL session_claim(uint16 vuid)
45 user_struct *vuser = get_valid_user_struct(vuid);
48 struct sessionid sessionid;
51 uint32 pid = (uint32)sys_getpid();
56 vuser->session_id = 0;
58 /* don't register sessions for the guest user - its just too
59 expensive to go through pam session code for browsing etc */
60 if (strequal(vuser->user.unix_name,lp_guestaccount(-1))) {
65 tdb = tdb_open_log(lock_path("sessionid.tdb"), 0, TDB_CLEAR_IF_FIRST|USE_TDB_MMAP_FLAG,
66 O_RDWR | O_CREAT, 0644);
68 DEBUG(1,("session_claim: failed to open sessionid tdb\n"));
73 ZERO_STRUCT(sessionid);
78 for (i=1;i<MAX_SESSION_ID;i++) {
79 slprintf(keystr, sizeof(keystr)-1, "ID/%d", i);
81 key.dsize = strlen(keystr)+1;
83 if (tdb_store(tdb, key, data, TDB_INSERT) == 0) break;
86 if (i == MAX_SESSION_ID) {
87 DEBUG(1,("session_claim: out of session IDs (max is %d)\n",
92 hostname = client_name();
93 if (strequal(hostname,"UNKNOWN"))
94 hostname = client_addr();
96 fstrcpy(sessionid.username, vuser->user.unix_name);
97 fstrcpy(sessionid.hostname, hostname);
98 slprintf(sessionid.id_str, sizeof(sessionid.id_str)-1, SESSION_TEMPLATE, i);
102 if (!smb_pam_claim_session(sessionid.username, sessionid.id_str, sessionid.hostname)) {
103 DEBUG(1,("pam_session rejected the session for %s [%s]\n",
104 sessionid.username, sessionid.id_str));
105 tdb_delete(tdb, key);
109 dlen = tdb_pack(dbuf, sizeof(dbuf), "fffdd",
110 sessionid.username, sessionid.hostname, sessionid.id_str,
111 sessionid.id_num, sessionid.pid);
115 if (tdb_store(tdb, key, data, TDB_MODIFY) != 0) {
116 DEBUG(1,("session_claim: unable to create session id record\n"));
122 sys_utmp_claim(sessionid.username, sessionid.hostname,
123 sessionid.id_str, sessionid.id_num);
127 vuser->session_id = i;
131 /* called when a session is destroyed */
132 void session_yield(uint16 vuid)
134 user_struct *vuser = get_valid_user_struct(vuid);
136 struct sessionid sessionid;
142 if (vuser->session_id == 0) {
146 slprintf(keystr, sizeof(keystr)-1, "ID/%d", vuser->session_id);
149 key.dsize = strlen(keystr)+1;
151 data = tdb_fetch(tdb, key);
152 if (data.dptr == NULL) {
156 tdb_unpack(data.dptr, data.dsize, "fffdd",
157 &sessionid.username, &sessionid.hostname, &sessionid.id_str,
158 &sessionid.id_num, &sessionid.pid);
160 safe_free(data.dptr);
165 sys_utmp_yield(sessionid.username, sessionid.hostname,
166 sessionid.id_str, sessionid.id_num);
170 smb_pam_close_session(sessionid.username, sessionid.id_str, sessionid.hostname);
172 tdb_delete(tdb, key);
176 /* null functions - no session support needed */
177 BOOL session_claim(uint16 vuid) { return True; }
178 void session_yield(uint16 vuid) {}