2 Unix SMB/CIFS implementation.
4 Winbind daemon for ntdom nss module
6 Copyright (C) by Tim Potter 2000-2002
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 BOOL opt_nocache = False;
27 BOOL opt_dual_daemon = False;
29 /* Reload configuration */
31 static BOOL reload_services_file(BOOL test)
39 pstrcpy(fname,lp_configfile());
40 if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) {
41 pstrcpy(dyn_CONFIGFILE,fname);
46 snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
47 lp_set_logfile(logfile);
50 ret = lp_load(dyn_CONFIGFILE,False,False,True);
52 snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
53 lp_set_logfile(logfile);
63 /**************************************************************************** **
64 Prepare to dump a core file - carefully!
65 **************************************************************************** */
67 static BOOL dump_core(void)
71 pstrcpy( dname, lp_logfile() );
72 if ((p=strrchr(dname,'/')))
74 pstrcat( dname, "/corefiles" );
76 sys_chown( dname, getuid(), getgid() );
86 getrlimit( RLIMIT_CORE, &rlp );
87 rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
88 setrlimit( RLIMIT_CORE, &rlp );
89 getrlimit( RLIMIT_CORE, &rlp );
90 DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
95 DEBUG(0,("Dumping core in %s\n",dname));
101 /**************************************************************************** **
103 **************************************************************************** */
105 static void fault_quit(void)
112 static void winbindd_status(void)
114 struct winbindd_cli_state *tmp;
116 DEBUG(0, ("winbindd status:\n"));
118 /* Print client state information */
120 DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
122 if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
123 DEBUG(2, ("\tclient list:\n"));
124 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
125 DEBUG(2, ("\t\tpid %d, sock %d, rbl %d, wbl %d\n",
126 tmp->pid, tmp->sock, tmp->read_buf_len,
127 tmp->write_buf_len));
132 /* Print winbindd status to log file */
134 static void print_winbindd_status(void)
137 winbindd_idmap_status();
138 winbindd_cm_status();
141 /* Flush client cache */
143 static void flush_caches(void)
145 /* Clear cached user and group enumation info */
146 wcache_flush_cache();
149 /* Handle the signal by unlinking socket and exiting */
151 static void terminate(void)
155 winbindd_idmap_close();
157 /* Remove socket file */
158 snprintf(path, sizeof(path), "%s/%s",
159 WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
164 static BOOL do_sigterm;
166 static void termination_handler(int signum)
172 static BOOL do_sigusr2;
174 static void sigusr2_handler(int signum)
180 static BOOL do_sighup;
182 static void sighup_handler(int signum)
188 struct dispatch_table {
189 enum winbindd_cmd cmd;
190 enum winbindd_result (*fn)(struct winbindd_cli_state *state);
191 char *winbindd_cmd_name;
194 static struct dispatch_table dispatch_table[] = {
198 { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
199 { WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
201 { WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
202 { WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
203 { WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
205 { WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
207 /* Group functions */
209 { WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
210 { WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
211 { WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
212 { WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
213 { WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
214 { WINBINDD_GETGRLST, winbindd_getgrent, "GETGRLST" },
216 /* PAM auth functions */
218 { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
219 { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
220 { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
222 /* Enumeration functions */
224 { WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
225 { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
226 { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains, "LIST_TRUSTDOM" },
227 { WINBINDD_SHOW_SEQUENCE, winbindd_show_sequence, "SHOW_SEQUENCE" },
229 /* SID related functions */
231 { WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
232 { WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
234 /* Lookup related functions */
236 { WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
237 { WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
238 { WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
239 { WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
243 { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
244 { WINBINDD_PING, winbindd_ping, "PING" },
245 { WINBINDD_INFO, winbindd_info, "INFO" },
246 { WINBINDD_INTERFACE_VERSION, winbindd_interface_version, "INTERFACE_VERSION" },
247 { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
251 { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
252 { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
256 { WINBINDD_NUM_CMDS, NULL, "NONE" }
259 static void process_request(struct winbindd_cli_state *state)
261 struct dispatch_table *table = dispatch_table;
263 /* Free response data - we may be interrupted and receive another
264 command before being able to send this data off. */
266 SAFE_FREE(state->response.extra_data);
268 ZERO_STRUCT(state->response);
270 state->response.result = WINBINDD_ERROR;
271 state->response.length = sizeof(struct winbindd_response);
273 /* Process command */
275 for (table = dispatch_table; table->fn; table++) {
276 if (state->request.cmd == table->cmd) {
277 DEBUG(10,("process_request: request fn %s\n", table->winbindd_cmd_name ));
278 state->response.result = table->fn(state);
284 DEBUG(10,("process_request: unknown request fn number %d\n", (int)state->request.cmd ));
286 /* In case extra data pointer is NULL */
288 if (!state->response.extra_data)
289 state->response.length = sizeof(struct winbindd_response);
292 /* Process a new connection by adding it to the client connection list */
294 static void new_connection(int listen_sock)
296 struct sockaddr_un sunaddr;
297 struct winbindd_cli_state *state;
301 /* Accept connection */
303 len = sizeof(sunaddr);
306 sock = accept(listen_sock, (struct sockaddr *)&sunaddr, &len);
307 } while (sock == -1 && errno == EINTR);
312 DEBUG(6,("accepted socket %d\n", sock));
314 /* Create new connection structure */
316 if ((state = (struct winbindd_cli_state *)
317 malloc(sizeof(*state))) == NULL)
323 /* Add to connection list */
325 winbindd_add_client(state);
328 /* Remove a client connection from client connection list */
330 static void remove_client(struct winbindd_cli_state *state)
332 /* It's a dead client - hold a funeral */
340 /* Free any getent state */
342 free_getent_state(state->getpwent_state);
343 free_getent_state(state->getgrent_state);
345 /* We may have some extra data that was not freed if the
346 client was killed unexpectedly */
348 SAFE_FREE(state->response.extra_data);
350 /* Remove from list and free */
352 winbindd_remove_client(state);
358 /* Process a complete received packet from a client */
360 void winbind_process_packet(struct winbindd_cli_state *state)
362 /* Process request */
364 /* Ensure null termination of entire request */
365 state->request.domain[sizeof(state->request.domain)-1]='\0';
367 state->pid = state->request.pid;
369 process_request(state);
371 /* Update client state */
373 state->read_buf_len = 0;
374 state->write_buf_len = sizeof(struct winbindd_response);
376 /* we might need to send it to the dual daemon */
377 if (opt_dual_daemon) {
378 dual_send_request(state);
382 /* Read some data from a client connection */
384 void winbind_client_read(struct winbindd_cli_state *state)
390 n = sys_read(state->sock, state->read_buf_len +
391 (char *)&state->request,
392 sizeof(state->request) - state->read_buf_len);
394 DEBUG(10,("client_read: read %d bytes. Need %d more for a full request.\n", n, sizeof(state->request) - n - state->read_buf_len ));
396 /* Read failed, kill client */
398 if (n == -1 || n == 0) {
399 DEBUG(5,("read failed on sock %d, pid %d: %s\n",
400 state->sock, state->pid,
401 (n == -1) ? strerror(errno) : "EOF"));
403 state->finished = True;
407 /* Update client state */
409 state->read_buf_len += n;
412 /* Write some data to a client connection */
414 static void client_write(struct winbindd_cli_state *state)
419 /* Write some data */
421 if (!state->write_extra_data) {
423 /* Write response structure */
425 data = (char *)&state->response + sizeof(state->response) -
426 state->write_buf_len;
430 /* Write extra data */
432 data = (char *)state->response.extra_data +
433 state->response.length -
434 sizeof(struct winbindd_response) -
435 state->write_buf_len;
438 num_written = sys_write(state->sock, data, state->write_buf_len);
440 DEBUG(10,("client_write: wrote %d bytes.\n", num_written ));
442 /* Write failed, kill cilent */
444 if (num_written == -1 || num_written == 0) {
446 DEBUG(3,("write failed on sock %d, pid %d: %s\n",
447 state->sock, state->pid,
448 (num_written == -1) ? strerror(errno) : "EOF"));
450 state->finished = True;
452 SAFE_FREE(state->response.extra_data);
457 /* Update client state */
459 state->write_buf_len -= num_written;
461 /* Have we written all data? */
463 if (state->write_buf_len == 0) {
465 /* Take care of extra data */
467 if (state->write_extra_data) {
469 SAFE_FREE(state->response.extra_data);
471 state->write_extra_data = False;
473 DEBUG(10,("client_write: client_write: complete response written.\n"));
475 } else if (state->response.length >
476 sizeof(struct winbindd_response)) {
478 /* Start writing extra data */
480 state->write_buf_len =
481 state->response.length -
482 sizeof(struct winbindd_response);
484 DEBUG(10,("client_write: need to write %d extra data bytes.\n", (int)state->write_buf_len));
486 state->write_extra_data = True;
491 /* Process incoming clients on accept_sock. We use a tricky non-blocking,
492 non-forking, non-threaded model which allows us to handle many
493 simultaneous connections while remaining impervious to many denial of
496 static void process_loop(void)
498 /* We'll be doing this a lot */
501 struct winbindd_cli_state *state;
503 int maxfd, listen_sock, selret;
504 struct timeval timeout;
506 /* Handle messages */
510 /* rescan the trusted domains list. This must be done
511 regularly to cope with transitive trusts */
512 rescan_trusted_domains();
514 /* Free up temporary memory */
517 main_loop_talloc_free();
519 /* Initialise fd lists for select() */
521 listen_sock = open_winbindd_socket();
526 FD_SET(listen_sock, &r_fds);
528 timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
531 if (opt_dual_daemon) {
532 maxfd = dual_select_setup(&w_fds, maxfd);
535 /* Set up client readers and writers */
537 state = winbindd_client_list();
541 /* Dispose of client connection if it is marked as
544 if (state->finished) {
545 struct winbindd_cli_state *next = state->next;
547 remove_client(state);
552 /* Select requires we know the highest fd used */
554 if (state->sock > maxfd)
557 /* Add fd for reading */
559 if (state->read_buf_len != sizeof(state->request))
560 FD_SET(state->sock, &r_fds);
562 /* Add fd for writing */
564 if (state->write_buf_len)
565 FD_SET(state->sock, &w_fds);
572 selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
577 if ((selret == -1 && errno != EINTR) || selret == 0) {
579 /* Select error, something is badly wrong */
585 /* Create a new connection if accept_sock readable */
589 if (opt_dual_daemon) {
593 if (FD_ISSET(listen_sock, &r_fds))
594 new_connection(listen_sock);
596 /* Process activity on client connections */
598 for (state = winbindd_client_list(); state;
599 state = state->next) {
601 /* Data available for reading */
603 if (FD_ISSET(state->sock, &r_fds)) {
607 winbind_client_read(state);
610 * If we have the start of a
611 * packet, then check the
612 * length field to make sure
613 * the client's not talking
617 if (state->read_buf_len >= sizeof(uint32)
618 && *(uint32 *) &state->request != sizeof(state->request)) {
619 DEBUG(0,("process_loop: Invalid request size from pid %d: %d bytes sent, should be %d\n",
620 state->request.pid, *(uint32 *) &state->request, sizeof(state->request)));
622 remove_client(state);
626 /* A request packet might be
629 if (state->read_buf_len ==
630 sizeof(state->request)) {
631 winbind_process_packet(state);
635 /* Data available for writing */
637 if (FD_ISSET(state->sock, &w_fds))
643 winbindd_check_cache_size(time(NULL));
646 /* Check signal handling things */
653 DEBUG(3, ("got SIGHUP\n"));
655 /* Flush various caches */
658 reload_services_file(True);
663 print_winbindd_status();
671 these are split out from the main winbindd for use by the background daemon
673 BOOL winbind_setup_common(void)
677 if (!secrets_init()) {
679 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
683 namecache_enable(); /* Enable netbios namecache */
685 /* Check winbindd parameters are valid */
687 if (!winbindd_param_init())
690 /* Get list of domains we look up requests for. This includes the
691 domain which we are a member of as well as any trusted
696 ZERO_STRUCT(server_state);
698 /* Winbind daemon initialisation */
700 if (!winbindd_idmap_init())
703 /* Unblock all signals we are interested in as they may have been
704 blocked by the parent process. */
706 BlockSignals(False, SIGINT);
707 BlockSignals(False, SIGQUIT);
708 BlockSignals(False, SIGTERM);
709 BlockSignals(False, SIGUSR1);
710 BlockSignals(False, SIGUSR2);
711 BlockSignals(False, SIGHUP);
713 /* Setup signal handlers */
715 CatchSignal(SIGINT, termination_handler); /* Exit on these sigs */
716 CatchSignal(SIGQUIT, termination_handler);
717 CatchSignal(SIGTERM, termination_handler);
719 CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
721 CatchSignal(SIGUSR2, sigusr2_handler); /* Debugging sigs */
722 CatchSignal(SIGHUP, sighup_handler);
730 struct winbindd_state server_state; /* Server state information */
733 static void usage(void)
735 printf("Usage: winbindd [options]\n");
736 printf("\t-i interactive mode\n");
737 printf("\t-B dual daemon mode\n");
738 printf("\t-n disable cacheing\n");
739 printf("\t-d level set debug level\n");
740 printf("\t-s configfile choose smb.conf location\n");
741 printf("\t-h show this help message\n");
744 int main(int argc, char **argv)
746 extern BOOL AllowDebugChange;
748 BOOL interactive = False;
751 /* glibc (?) likes to print "User defined signal 1" and exit if a
752 SIGUSR[12] is received before a handler is installed */
754 CatchSignal(SIGUSR1, SIG_IGN);
755 CatchSignal(SIGUSR2, SIG_IGN);
757 fault_setup((void (*)(void *))fault_quit );
759 snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
760 lp_set_logfile(logfile);
762 /* Initialise for running in non-root mode */
766 /* Set environment variable so we don't recursively call ourselves.
767 This may also be useful interactively. */
769 SETENV(WINBINDD_DONT_ENV, "1", 1);
771 /* Initialise samba/rpc client stuff */
773 while ((opt = getopt(argc, argv, "id:s:nhB")) != EOF) {
776 /* Don't become a daemon */
781 /* dual daemon system */
783 opt_dual_daemon = True;
786 /* disable cacheing */
791 /* Run with specified debug level */
793 DEBUGLEVEL = atoi(optarg);
794 AllowDebugChange = False;
797 /* Load a different smb.conf file */
799 pstrcpy(dyn_CONFIGFILE,optarg);
807 printf("Unknown option %c\n", (char)opt);
812 snprintf(logfile, sizeof(logfile), "%s/log.winbindd", dyn_LOGFILEBASE);
813 lp_set_logfile(logfile);
814 setup_logging("winbindd", interactive);
817 DEBUG(1, ("winbindd version %s started.\n", VERSION ) );
818 DEBUGADD( 1, ( "Copyright The Samba Team 2000-2001\n" ) );
820 if (!reload_services_file(False)) {
821 DEBUG(0, ("error opening config file\n"));
832 pidfile_create("winbindd");
838 * If we're interactive we want to set our own process group for
842 setpgid( (pid_t)0, (pid_t)0);
845 if (!winbind_setup_common()) {
849 if (opt_dual_daemon) {
853 /* Initialise messaging system */
855 if (!message_init()) {
856 DEBUG(0, ("unable to initialise messaging system\n"));
860 register_msg_pool_usage();
862 /* Loop waiting for requests */
866 uni_group_cache_shutdown();