/*
- Unix SMB/Netbios implementation.
- Version 2.0
+ Unix SMB/CIFS implementation.
session handling for utmp and PAM
- Copyright (C) tridge@samba.org 2001
- Copyright (C) abartlet@pcug.org.au 2001
+
+ Copyright (C) tridge@samba.org 2001
+ Copyright (C) abartlet@samba.org 2001
+ Copyright (C) Gerald (Jerry) Carter 2006
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* a "session" is claimed when we do a SessionSetupX operation
#include "includes.h"
-extern fstring remote_machine;
+/********************************************************************
+********************************************************************/
+
+static struct db_context *session_db_ctx(void)
+{
+ static struct db_context *ctx;
+
+ if (ctx)
+ return ctx;
+
+ ctx = db_open(NULL, lock_path("sessionid.tdb"), 0,
+ TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
+ O_RDWR | O_CREAT, 0644);
+ return ctx;
+}
-static TDB_CONTEXT *tdb;
-/* called when a session is created */
-BOOL session_claim(uint16 vuid)
+BOOL session_init(void)
{
- user_struct *vuser = get_valid_user_struct(vuid);
- int i;
- TDB_DATA data;
+ if (session_db_ctx() == NULL) {
+ DEBUG(1,("session_init: failed to open sessionid tdb\n"));
+ return False;
+ }
+
+ return True;
+}
+
+/********************************************************************
+ called when a session is created
+********************************************************************/
+
+BOOL session_claim(user_struct *vuser)
+{
+ TDB_DATA key, data;
+ int i = 0;
struct sessionid sessionid;
- uint32 pid = (uint32)sys_getpid();
- TDB_DATA key;
+ struct server_id pid = procid_self();
fstring keystr;
char * hostname;
+ struct db_context *ctx;
+ struct db_record *rec;
+ NTSTATUS status;
- vuser->session_id = 0;
+ vuser->session_keystr = NULL;
/* don't register sessions for the guest user - its just too
expensive to go through pam session code for browsing etc */
- if (strequal(vuser->user.unix_name,lp_guestaccount(-1))) {
+ if (vuser->guest) {
return True;
}
- if (!tdb) {
- tdb = tdb_open_log(lock_path("sessionid.tdb"), 0, TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
- O_RDWR | O_CREAT, 0644);
- if (!tdb) {
- DEBUG(1,("session_claim: failed to open sessionid tdb\n"));
- return False;
- }
+ if (!(ctx = session_db_ctx())) {
+ return False;
}
ZERO_STRUCT(sessionid);
data.dptr = NULL;
data.dsize = 0;
- for (i=1;i<MAX_SESSION_ID;i++) {
- slprintf(keystr, sizeof(keystr)-1, "ID/%d", i);
- key.dptr = keystr;
- key.dsize = strlen(keystr)+1;
+ if (lp_utmp()) {
- if (tdb_store(tdb, key, data, TDB_INSERT) == 0) break;
- }
+ for (i=1;i<MAX_SESSION_ID;i++) {
- if (i == MAX_SESSION_ID) {
- DEBUG(1,("session_claim: out of session IDs (max is %d)\n",
- MAX_SESSION_ID));
- return False;
+ /*
+ * This is very inefficient and needs fixing -- vl
+ */
+
+ struct server_id sess_pid;
+
+ snprintf(keystr, sizeof(keystr), "ID/%d", i);
+ key = string_term_tdb_data(keystr);
+
+ rec = ctx->fetch_locked(ctx, NULL, key);
+
+ if (rec == NULL) {
+ DEBUG(1, ("Could not lock \"%s\"\n", keystr));
+ return False;
+ }
+
+ if (rec->value.dsize != sizeof(sessionid)) {
+ DEBUG(1, ("Re-using invalid record\n"));
+ break;
+ }
+
+ sess_pid = ((struct sessionid *)rec->value.dptr)->pid;
+
+ if (!process_exists(sess_pid)) {
+ DEBUG(5, ("%s has died -- re-using session\n",
+ procid_str_static(&sess_pid)));
+ break;
+ }
+
+ TALLOC_FREE(rec);
+ }
+
+ if (i == MAX_SESSION_ID) {
+ SMB_ASSERT(rec == NULL);
+ DEBUG(1,("session_claim: out of session IDs "
+ "(max is %d)\n", MAX_SESSION_ID));
+ return False;
+ }
+
+ snprintf(sessionid.id_str, sizeof(sessionid.id_str),
+ SESSION_UTMP_TEMPLATE, i);
+ } else
+ {
+ snprintf(keystr, sizeof(keystr), "ID/%s/%u",
+ procid_str_static(&pid), vuser->vuid);
+ key = string_term_tdb_data(keystr);
+
+ rec = ctx->fetch_locked(ctx, NULL, key);
+
+ if (rec == NULL) {
+ DEBUG(1, ("Could not lock \"%s\"\n", keystr));
+ return False;
+ }
+
+ snprintf(sessionid.id_str, sizeof(sessionid.id_str),
+ SESSION_TEMPLATE, (long unsigned int)sys_getpid(),
+ vuser->vuid);
}
+ SMB_ASSERT(rec != NULL);
+
+ /* If 'hostname lookup' == yes, then do the DNS lookup. This is
+ needed because utmp and PAM both expect DNS names
+
+ client_name() handles this case internally.
+ */
+
hostname = client_name();
- if (strequal(hostname,"UNKNOWN"))
+ if (strcmp(hostname, "UNKNOWN") == 0) {
hostname = client_addr();
+ }
fstrcpy(sessionid.username, vuser->user.unix_name);
fstrcpy(sessionid.hostname, hostname);
- slprintf(sessionid.id_str, sizeof(sessionid.id_str)-1, SESSION_TEMPLATE, i);
- sessionid.id_num = i;
+ sessionid.id_num = i; /* Only valid for utmp sessions */
sessionid.pid = pid;
sessionid.uid = vuser->uid;
sessionid.gid = vuser->gid;
- fstrcpy(sessionid.remote_machine, remote_machine);
- fstrcpy(sessionid.ip_addr, client_addr());
+ fstrcpy(sessionid.remote_machine, get_remote_machine_name());
+ fstrcpy(sessionid.ip_addr_str, client_addr());
+ sessionid.connect_start = time(NULL);
- if (!smb_pam_claim_session(sessionid.username, sessionid.id_str, sessionid.hostname)) {
+ if (!smb_pam_claim_session(sessionid.username, sessionid.id_str,
+ sessionid.hostname)) {
DEBUG(1,("pam_session rejected the session for %s [%s]\n",
sessionid.username, sessionid.id_str));
- tdb_delete(tdb, key);
+
+ TALLOC_FREE(rec);
return False;
}
- data.dptr = (char *)&sessionid;
+ data.dptr = (uint8 *)&sessionid;
data.dsize = sizeof(sessionid);
- if (tdb_store(tdb, key, data, TDB_MODIFY) != 0) {
- DEBUG(1,("session_claim: unable to create session id record\n"));
+
+ status = rec->store(rec, data, TDB_REPLACE);
+
+ TALLOC_FREE(rec);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1,("session_claim: unable to create session id "
+ "record: %s\n", nt_errstr(status)));
return False;
}
-#if WITH_UTMP
if (lp_utmp()) {
- sys_utmp_claim(sessionid.username, sessionid.hostname,
+ sys_utmp_claim(sessionid.username, sessionid.hostname,
+ sessionid.ip_addr_str,
sessionid.id_str, sessionid.id_num);
}
-#endif
- vuser->session_id = i;
+ vuser->session_keystr = talloc_strdup(vuser, keystr);
+ if (!vuser->session_keystr) {
+ DEBUG(0, ("session_claim: talloc_strdup() failed for session_keystr\n"));
+ return False;
+ }
return True;
}
-/* called when a session is destroyed */
-void session_yield(uint16 vuid)
+/********************************************************************
+ called when a session is destroyed
+********************************************************************/
+
+void session_yield(user_struct *vuser)
{
- user_struct *vuser = get_valid_user_struct(vuid);
- TDB_DATA dbuf;
+ TDB_DATA key;
struct sessionid sessionid;
- TDB_DATA key;
- fstring keystr;
+ struct db_context *ctx;
+ struct db_record *rec;
- if (!tdb) return;
+ if (!(ctx = session_db_ctx())) return;
- if (vuser->session_id == 0) {
+ if (!vuser->session_keystr) {
return;
}
- slprintf(keystr, sizeof(keystr)-1, "ID/%d", vuser->session_id);
-
- key.dptr = keystr;
- key.dsize = strlen(keystr)+1;
+ key = string_term_tdb_data(vuser->session_keystr);
- dbuf = tdb_fetch(tdb, key);
-
- if (dbuf.dsize != sizeof(sessionid))
+ if (!(rec = ctx->fetch_locked(ctx, NULL, key))) {
return;
+ }
- memcpy(&sessionid, dbuf.dptr, sizeof(sessionid));
+ if (rec->value.dsize != sizeof(sessionid))
+ return;
- SAFE_FREE(dbuf.dptr);
+ memcpy(&sessionid, rec->value.dptr, sizeof(sessionid));
-#if WITH_UTMP
if (lp_utmp()) {
sys_utmp_yield(sessionid.username, sessionid.hostname,
+ sessionid.ip_addr_str,
sessionid.id_str, sessionid.id_num);
}
-#endif
- smb_pam_close_session(sessionid.username, sessionid.id_str, sessionid.hostname);
+ smb_pam_close_session(sessionid.username, sessionid.id_str,
+ sessionid.hostname);
+
+ rec->delete_rec(rec);
+
+ TALLOC_FREE(rec);
+}
+
+/********************************************************************
+********************************************************************/
+
+static BOOL session_traverse(int (*fn)(struct db_record *db,
+ void *private_data),
+ void *private_data)
+{
+ struct db_context *ctx;
+
+ if (!(ctx = session_db_ctx())) {
+ DEBUG(3, ("No tdb opened\n"));
+ return False;
+ }
+
+ ctx->traverse_read(ctx, fn, private_data);
+ return True;
+}
+
+/********************************************************************
+********************************************************************/
+
+struct session_list {
+ TALLOC_CTX *mem_ctx;
+ int count;
+ struct sessionid *sessions;
+};
+
+static int gather_sessioninfo(struct db_record *rec, void *state)
+{
+ struct session_list *sesslist = (struct session_list *) state;
+ const struct sessionid *current =
+ (const struct sessionid *) rec->value.dptr;
+
+ sesslist->sessions = TALLOC_REALLOC_ARRAY(
+ sesslist->mem_ctx, sesslist->sessions, struct sessionid,
+ sesslist->count+1);
+
+ if (!sesslist->sessions) {
+ sesslist->count = 0;
+ return -1;
+ }
+
+ memcpy(&sesslist->sessions[sesslist->count], current,
+ sizeof(struct sessionid));
+
+ sesslist->count++;
+
+ DEBUG(7,("gather_sessioninfo session from %s@%s\n",
+ current->username, current->remote_machine));
- tdb_delete(tdb, key);
+ return 0;
}
+/********************************************************************
+********************************************************************/
+
+int list_sessions(TALLOC_CTX *mem_ctx, struct sessionid **session_list)
+{
+ struct session_list sesslist;
+
+ sesslist.mem_ctx = mem_ctx;
+ sesslist.count = 0;
+ sesslist.sessions = NULL;
+
+ if (!session_traverse(gather_sessioninfo, (void *) &sesslist)) {
+ DEBUG(3, ("Session traverse failed\n"));
+ SAFE_FREE(sesslist.sessions);
+ *session_list = NULL;
+ return 0;
+ }
+
+ *session_list = sesslist.sessions;
+ return sesslist.count;
+}
git.samba.org / samba.git / blobdiff