2 Unix SMB/CIFS implementation.
4 Winbind daemon for ntdom nss module
6 Copyright (C) by Tim Potter 2000, 2001
7 Copyright (C) Andrew Tridgell 2002
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 /* List of all connected clients */
28 struct winbindd_cli_state *client_list;
29 static int num_clients;
30 BOOL opt_nocache = False;
31 BOOL opt_dual_daemon = False;
33 /* Reload configuration */
35 static BOOL reload_services_file(BOOL test)
43 pstrcpy(fname,lp_configfile());
44 if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) {
45 pstrcpy(dyn_CONFIGFILE,fname);
50 snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
51 lp_set_logfile(logfile);
54 ret = lp_load(dyn_CONFIGFILE,False,False,True);
56 snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
57 lp_set_logfile(logfile);
67 /**************************************************************************** **
68 Prepare to dump a core file - carefully!
69 **************************************************************************** */
71 static BOOL dump_core(void)
75 pstrcpy( dname, lp_logfile() );
76 if ((p=strrchr(dname,'/')))
78 pstrcat( dname, "/corefiles" );
80 sys_chown( dname, getuid(), getgid() );
90 getrlimit( RLIMIT_CORE, &rlp );
91 rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
92 setrlimit( RLIMIT_CORE, &rlp );
93 getrlimit( RLIMIT_CORE, &rlp );
94 DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
99 DEBUG(0,("Dumping core in %s\n",dname));
105 /**************************************************************************** **
107 **************************************************************************** */
109 static void fault_quit(void)
116 static void winbindd_status(void)
118 struct winbindd_cli_state *tmp;
120 DEBUG(0, ("winbindd status:\n"));
122 /* Print client state information */
124 DEBUG(0, ("\t%d clients currently active\n", num_clients));
126 if (DEBUGLEVEL >= 2 && num_clients) {
127 DEBUG(2, ("\tclient list:\n"));
128 for(tmp = client_list; tmp; tmp = tmp->next) {
129 DEBUG(2, ("\t\tpid %d, sock %d, rbl %d, wbl %d\n",
130 tmp->pid, tmp->sock, tmp->read_buf_len,
131 tmp->write_buf_len));
136 /* Print winbindd status to log file */
138 static void print_winbindd_status(void)
141 winbindd_idmap_status();
142 winbindd_cm_status();
145 /* Flush client cache */
147 static void flush_caches(void)
149 /* Clear cached user and group enumation info */
150 wcache_flush_cache();
153 /* Handle the signal by unlinking socket and exiting */
155 static void terminate(void)
159 winbindd_idmap_close();
161 /* Remove socket file */
162 snprintf(path, sizeof(path), "%s/%s",
163 WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
168 static BOOL do_sigterm;
170 static void termination_handler(int signum)
176 static BOOL do_sigusr2;
178 static void sigusr2_handler(int signum)
184 static BOOL do_sighup;
186 static void sighup_handler(int signum)
192 /* Create winbindd socket */
194 static int create_sock(void)
196 return create_pipe_sock( WINBINDD_SOCKET_DIR,
197 WINBINDD_SOCKET_NAME, 0755);
200 struct dispatch_table {
201 enum winbindd_cmd cmd;
202 enum winbindd_result (*fn)(struct winbindd_cli_state *state);
203 char *winbindd_cmd_name;
206 static struct dispatch_table dispatch_table[] = {
210 { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
211 { WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
213 { WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
214 { WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
215 { WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
217 { WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
219 /* Group functions */
221 { WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
222 { WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
223 { WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
224 { WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
225 { WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
226 { WINBINDD_GETGRLST, winbindd_getgrent, "GETGRLST" },
228 /* PAM auth functions */
230 { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
231 { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
232 { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
234 /* Enumeration functions */
236 { WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
237 { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
238 { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains, "LIST_TRUSTDOM" },
239 { WINBINDD_SHOW_SEQUENCE, winbindd_show_sequence, "SHOW_SEQUENCE" },
241 /* SID related functions */
243 { WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
244 { WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
246 /* Lookup related functions */
248 { WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
249 { WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
250 { WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
251 { WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
255 { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
256 { WINBINDD_PING, winbindd_ping, "PING" },
257 { WINBINDD_INFO, winbindd_info, "INFO" },
258 { WINBINDD_INTERFACE_VERSION, winbindd_interface_version, "INTERFACE_VERSION" },
259 { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
263 { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
264 { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
268 { WINBINDD_NUM_CMDS, NULL, "NONE" }
271 static void process_request(struct winbindd_cli_state *state)
273 struct dispatch_table *table = dispatch_table;
275 /* Free response data - we may be interrupted and receive another
276 command before being able to send this data off. */
278 SAFE_FREE(state->response.extra_data);
280 ZERO_STRUCT(state->response);
282 state->response.result = WINBINDD_ERROR;
283 state->response.length = sizeof(struct winbindd_response);
285 /* Process command */
287 for (table = dispatch_table; table->fn; table++) {
288 if (state->request.cmd == table->cmd) {
289 DEBUG(10,("process_request: request fn %s\n", table->winbindd_cmd_name ));
290 state->response.result = table->fn(state);
296 DEBUG(10,("process_request: unknown request fn number %d\n", (int)state->request.cmd ));
298 /* In case extra data pointer is NULL */
300 if (!state->response.extra_data)
301 state->response.length = sizeof(struct winbindd_response);
304 /* Process a new connection by adding it to the client connection list */
306 static void new_connection(int accept_sock)
308 struct sockaddr_un sunaddr;
309 struct winbindd_cli_state *state;
313 /* Accept connection */
315 len = sizeof(sunaddr);
318 sock = accept(accept_sock, (struct sockaddr *)&sunaddr, &len);
319 } while (sock == -1 && errno == EINTR);
324 DEBUG(6,("accepted socket %d\n", sock));
326 /* Create new connection structure */
328 if ((state = (struct winbindd_cli_state *)
329 malloc(sizeof(*state))) == NULL)
335 /* Add to connection list */
337 DLIST_ADD(client_list, state);
341 /* Remove a client connection from client connection list */
343 static void remove_client(struct winbindd_cli_state *state)
345 /* It's a dead client - hold a funeral */
353 /* Free any getent state */
355 free_getent_state(state->getpwent_state);
356 free_getent_state(state->getgrent_state);
358 /* We may have some extra data that was not freed if the
359 client was killed unexpectedly */
361 SAFE_FREE(state->response.extra_data);
363 /* Remove from list and free */
365 DLIST_REMOVE(client_list, state);
372 /* Process a complete received packet from a client */
374 void winbind_process_packet(struct winbindd_cli_state *state)
376 /* Process request */
378 state->pid = state->request.pid;
380 process_request(state);
382 /* Update client state */
384 state->read_buf_len = 0;
385 state->write_buf_len = sizeof(struct winbindd_response);
387 /* we might need to send it to the dual daemon */
388 if (opt_dual_daemon) {
389 dual_send_request(state);
393 /* Read some data from a client connection */
395 void winbind_client_read(struct winbindd_cli_state *state)
403 n = read(state->sock, state->read_buf_len +
404 (char *)&state->request,
405 sizeof(state->request) - state->read_buf_len);
407 } while (n == -1 && errno == EINTR);
409 DEBUG(10,("client_read: read %d bytes. Need %d more for a full request.\n", n, sizeof(state->request) - n - state->read_buf_len ));
411 /* Read failed, kill client */
413 if (n == -1 || n == 0) {
414 DEBUG(5,("read failed on sock %d, pid %d: %s\n",
415 state->sock, state->pid,
416 (n == -1) ? strerror(errno) : "EOF"));
418 state->finished = True;
422 /* Update client state */
424 state->read_buf_len += n;
427 /* Write some data to a client connection */
429 static void client_write(struct winbindd_cli_state *state)
434 /* Write some data */
436 if (!state->write_extra_data) {
438 /* Write response structure */
440 data = (char *)&state->response + sizeof(state->response) -
441 state->write_buf_len;
445 /* Write extra data */
447 data = (char *)state->response.extra_data +
448 state->response.length -
449 sizeof(struct winbindd_response) -
450 state->write_buf_len;
454 num_written = write(state->sock, data, state->write_buf_len);
455 } while (num_written == -1 && errno == EINTR);
457 DEBUG(10,("client_write: wrote %d bytes.\n", num_written ));
459 /* Write failed, kill cilent */
461 if (num_written == -1 || num_written == 0) {
463 DEBUG(3,("write failed on sock %d, pid %d: %s\n",
464 state->sock, state->pid,
465 (num_written == -1) ? strerror(errno) : "EOF"));
467 state->finished = True;
469 SAFE_FREE(state->response.extra_data);
474 /* Update client state */
476 state->write_buf_len -= num_written;
478 /* Have we written all data? */
480 if (state->write_buf_len == 0) {
482 /* Take care of extra data */
484 if (state->write_extra_data) {
486 SAFE_FREE(state->response.extra_data);
488 state->write_extra_data = False;
490 DEBUG(10,("client_write: client_write: complete response written.\n"));
492 } else if (state->response.length >
493 sizeof(struct winbindd_response)) {
495 /* Start writing extra data */
497 state->write_buf_len =
498 state->response.length -
499 sizeof(struct winbindd_response);
501 DEBUG(10,("client_write: need to write %d extra data bytes.\n", (int)state->write_buf_len));
503 state->write_extra_data = True;
508 /* Process incoming clients on accept_sock. We use a tricky non-blocking,
509 non-forking, non-threaded model which allows us to handle many
510 simultaneous connections while remaining impervious to many denial of
513 static void process_loop(int accept_sock)
515 /* We'll be doing this a lot */
518 struct winbindd_cli_state *state;
520 int maxfd = accept_sock, selret;
521 struct timeval timeout;
523 /* Handle messages */
527 /* Free up temporary memory */
530 main_loop_talloc_free();
532 /* Initialise fd lists for select() */
536 FD_SET(accept_sock, &r_fds);
538 timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
541 if (opt_dual_daemon) {
542 maxfd = dual_select_setup(&w_fds, maxfd);
545 /* Set up client readers and writers */
551 /* Dispose of client connection if it is marked as
554 if (state->finished) {
555 struct winbindd_cli_state *next = state->next;
557 remove_client(state);
562 /* Select requires we know the highest fd used */
564 if (state->sock > maxfd)
567 /* Add fd for reading */
569 if (state->read_buf_len != sizeof(state->request))
570 FD_SET(state->sock, &r_fds);
572 /* Add fd for writing */
574 if (state->write_buf_len)
575 FD_SET(state->sock, &w_fds);
582 selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
587 if ((selret == -1 && errno != EINTR) || selret == 0) {
589 /* Select error, something is badly wrong */
595 /* Create a new connection if accept_sock readable */
599 if (opt_dual_daemon) {
603 if (FD_ISSET(accept_sock, &r_fds))
604 new_connection(accept_sock);
606 /* Process activity on client connections */
608 for (state = client_list; state; state = state->next) {
610 /* Data available for reading */
612 if (FD_ISSET(state->sock, &r_fds)) {
616 winbind_client_read(state);
619 * If we have the start of a
620 * packet, then check the
621 * length field to make sure
622 * the client's not talking
626 if (state->read_buf_len >= sizeof(uint32)
627 && *(uint32 *) &state->request != sizeof(state->request)) {
628 DEBUG(0,("process_loop: Invalid request size (%d) send, should be (%d)\n",
629 *(uint32 *) &state->request, sizeof(state->request)));
631 remove_client(state);
635 /* A request packet might be
638 if (state->read_buf_len ==
639 sizeof(state->request)) {
640 winbind_process_packet(state);
644 /* Data available for writing */
646 if (FD_ISSET(state->sock, &w_fds))
652 winbindd_check_cache_size(time(NULL));
655 /* Check signal handling things */
662 /* Flush winbindd cache */
665 reload_services_file(True);
670 print_winbindd_status();
678 these are split out from the main winbindd for use by the background daemon
680 int winbind_setup_common(void)
684 if (!secrets_init()) {
686 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
691 /* Get list of domains we look up requests for. This includes the
692 domain which we are a member of as well as any trusted
697 ZERO_STRUCT(server_state);
699 /* Winbind daemon initialisation */
701 if (!winbindd_param_init())
704 if (!winbindd_idmap_init())
707 /* Unblock all signals we are interested in as they may have been
708 blocked by the parent process. */
710 BlockSignals(False, SIGINT);
711 BlockSignals(False, SIGQUIT);
712 BlockSignals(False, SIGTERM);
713 BlockSignals(False, SIGUSR1);
714 BlockSignals(False, SIGUSR2);
715 BlockSignals(False, SIGHUP);
717 /* Setup signal handlers */
719 CatchSignal(SIGINT, termination_handler); /* Exit on these sigs */
720 CatchSignal(SIGQUIT, termination_handler);
721 CatchSignal(SIGTERM, termination_handler);
723 CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
725 CatchSignal(SIGUSR2, sigusr2_handler); /* Debugging sigs */
726 CatchSignal(SIGHUP, sighup_handler);
734 struct winbindd_state server_state; /* Server state information */
737 static void usage(void)
739 printf("Usage: winbindd [options]\n");
740 printf("\t-i interactive mode\n");
741 printf("\t-B dual daemon mode\n");
742 printf("\t-n disable cacheing\n");
743 printf("\t-d level set debug level\n");
744 printf("\t-s configfile choose smb.conf location\n");
745 printf("\t-h show this help message\n");
748 int main(int argc, char **argv)
750 extern BOOL AllowDebugChange;
751 extern pstring global_myname;
752 extern fstring global_myworkgroup;
753 extern BOOL append_log;
756 BOOL interactive = False;
759 /* glibc (?) likes to print "User defined signal 1" and exit if a
760 SIGUSR[12] is received before a handler is installed */
762 CatchSignal(SIGUSR1, SIG_IGN);
763 CatchSignal(SIGUSR2, SIG_IGN);
765 fault_setup((void (*)(void *))fault_quit );
767 /* Append to log file by default as we are a single process daemon
772 snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
773 lp_set_logfile(logfile);
775 /* Initialise for running in non-root mode */
779 /* Set environment variable so we don't recursively call ourselves.
780 This may also be useful interactively. */
782 SETENV(WINBINDD_DONT_ENV, "1", 1);
784 /* Initialise samba/rpc client stuff */
786 while ((opt = getopt(argc, argv, "id:s:nhB")) != EOF) {
789 /* Don't become a daemon */
794 /* dual daemon system */
796 opt_dual_daemon = True;
799 /* disable cacheing */
804 /* Run with specified debug level */
806 DEBUGLEVEL = atoi(optarg);
807 AllowDebugChange = False;
810 /* Load a different smb.conf file */
812 pstrcpy(dyn_CONFIGFILE,optarg);
820 printf("Unknown option %c\n", (char)opt);
825 snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
826 lp_set_logfile(logfile);
827 setup_logging("winbindd", interactive);
830 DEBUG(1, ("winbindd version %s started.\n", VERSION ) );
831 DEBUGADD( 1, ( "Copyright The Samba Team 2000-2001\n" ) );
833 if (!reload_services_file(False)) {
834 DEBUG(0, ("error opening config file\n"));
840 if (!*global_myname) {
843 fstrcpy(global_myname, myhostname());
844 p = strchr(global_myname, '.');
849 fstrcpy(global_myworkgroup, lp_workgroup());
853 pidfile_create("winbindd");
858 * If we're interactive we want to set our own process group for
862 setpgid( (pid_t)0, (pid_t)0);
865 if (opt_dual_daemon) {
869 if (winbind_setup_common() != 0) {
873 /* Initialise messaging system */
875 if (!message_init()) {
876 DEBUG(0, ("unable to initialise messaging system\n"));
880 register_msg_pool_usage();
882 /* Create UNIX domain socket */
884 if ((accept_sock = create_sock()) == -1) {
885 DEBUG(0, ("failed to create socket\n"));
889 /* Loop waiting for requests */
891 process_loop(accept_sock);
893 uni_group_cache_shutdown();