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 extern fstring remote_machine;
33 static TDB_CONTEXT *tdb;
34 /* called when a session is created */
35 BOOL session_claim(uint16 vuid)
37 user_struct *vuser = get_valid_user_struct(vuid);
40 struct sessionid sessionid;
41 uint32 pid = (uint32)sys_getpid();
46 vuser->session_id = 0;
48 /* don't register sessions for the guest user - its just too
49 expensive to go through pam session code for browsing etc */
50 if (strequal(vuser->user.unix_name,lp_guestaccount(-1))) {
55 tdb = tdb_open_log(lock_path("sessionid.tdb"), 0, TDB_CLEAR_IF_FIRST|USE_TDB_MMAP_FLAG,
56 O_RDWR | O_CREAT, 0644);
58 DEBUG(1,("session_claim: failed to open sessionid tdb\n"));
63 ZERO_STRUCT(sessionid);
68 for (i=1;i<MAX_SESSION_ID;i++) {
69 slprintf(keystr, sizeof(keystr)-1, "ID/%d", i);
71 key.dsize = strlen(keystr)+1;
73 if (tdb_store(tdb, key, data, TDB_INSERT) == 0) break;
76 if (i == MAX_SESSION_ID) {
77 DEBUG(1,("session_claim: out of session IDs (max is %d)\n",
82 hostname = client_name();
83 if (strequal(hostname,"UNKNOWN"))
84 hostname = client_addr();
86 fstrcpy(sessionid.username, vuser->user.unix_name);
87 fstrcpy(sessionid.hostname, hostname);
88 slprintf(sessionid.id_str, sizeof(sessionid.id_str)-1, SESSION_TEMPLATE, i);
91 sessionid.uid = vuser->uid;
92 sessionid.gid = vuser->gid;
93 fstrcpy(sessionid.remote_machine, remote_machine);
94 fstrcpy(sessionid.ip_addr, client_addr());
96 if (!smb_pam_claim_session(sessionid.username, sessionid.id_str, sessionid.hostname)) {
97 DEBUG(1,("pam_session rejected the session for %s [%s]\n",
98 sessionid.username, sessionid.id_str));
103 data.dptr = (char *)&sessionid;
104 data.dsize = sizeof(sessionid);
105 if (tdb_store(tdb, key, data, TDB_MODIFY) != 0) {
106 DEBUG(1,("session_claim: unable to create session id record\n"));
112 sys_utmp_claim(sessionid.username, sessionid.hostname,
113 sessionid.id_str, sessionid.id_num);
117 vuser->session_id = i;
121 /* called when a session is destroyed */
122 void session_yield(uint16 vuid)
124 user_struct *vuser = get_valid_user_struct(vuid);
126 struct sessionid sessionid;
132 if (vuser->session_id == 0) {
136 slprintf(keystr, sizeof(keystr)-1, "ID/%d", vuser->session_id);
139 key.dsize = strlen(keystr)+1;
141 dbuf = tdb_fetch(tdb, key);
143 if (dbuf.dsize != sizeof(sessionid))
146 memcpy(&sessionid, dbuf.dptr, sizeof(sessionid));
148 safe_free(dbuf.dptr);
153 sys_utmp_yield(sessionid.username, sessionid.hostname,
154 sessionid.id_str, sessionid.id_num);
158 smb_pam_close_session(sessionid.username, sessionid.id_str, sessionid.hostname);
160 tdb_delete(tdb, key);