source3/winbindd/winbindd.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon for ntdom nss module
   5
   6    Copyright (C) by Tim Potter 2000-2002
   7    Copyright (C) Andrew Tridgell 2002
   8    Copyright (C) Jelmer Vernooij 2003
   9    Copyright (C) Volker Lendecke 2004
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "popt_common.h"
  27 #include "winbindd.h"
  28 #include "nsswitch/winbind_client.h"
  29 #include "../../nsswitch/libwbclient/wbc_async.h"
  30 #include "librpc/gen_ndr/messaging.h"
  31 #include "../librpc/gen_ndr/srv_lsa.h"
  32 #include "../librpc/gen_ndr/srv_samr.h"
  33 #include "secrets.h"
  34 #include "idmap.h"
  35
  36 #undef DBGC_CLASS
  37 #define DBGC_CLASS DBGC_WINBIND
  38
  39 static bool opt_nocache = False;
  40 static bool interactive = False;
  41
  42 extern bool override_logfile;
  43
  44 /* Reload configuration */
  45
  46 static bool reload_services_file(const char *lfile)
  47 {
  48         bool ret;
  49
  50         if (lp_loaded()) {
  51                 const char *fname = lp_configfile();
  52
  53                 if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
  54                         set_dyn_CONFIGFILE(fname);
  55                 }
  56         }
  57
  58         /* if this is a child, restore the logfile to the special
  59            name - <domain>, idmap, etc. */
  60         if (lfile && *lfile) {
  61                 lp_set_logfile(lfile);
  62         }
  63
  64         reopen_logs();
  65         ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
  66
  67         reopen_logs();
  68         load_interfaces();
  69
  70         return(ret);
  71 }
  72
  73
  74 /**************************************************************************** **
  75  Handle a fault..
  76  **************************************************************************** */
  77
  78 static void fault_quit(void)
  79 {
  80         dump_core();
  81 }
  82
  83 static void winbindd_status(void)
  84 {
  85         struct winbindd_cli_state *tmp;
  86
  87         DEBUG(0, ("winbindd status:\n"));
  88
  89         /* Print client state information */
  90
  91         DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
  92
  93         if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
  94                 DEBUG(2, ("\tclient list:\n"));
  95                 for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
  96                         DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
  97                                      (unsigned long)tmp->pid, tmp->sock,
  98                                      client_is_idle(tmp) ? "idle" : "active"));
  99                 }
 100         }
 101 }
 102
 103 /* Flush client cache */
 104
 105 static void flush_caches(void)
 106 {
 107         /* We need to invalidate cached user list entries on a SIGHUP
 108            otherwise cached access denied errors due to restrict anonymous
 109            hang around until the sequence number changes. */
 110
 111         if (!wcache_invalidate_cache()) {
 112                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 113                 if (!winbindd_cache_validate_and_initialize()) {
 114                         exit(1);
 115                 }
 116         }
 117 }
 118
 119 static void flush_caches_noinit(void)
 120 {
 121         /*
 122          * We need to invalidate cached user list entries on a SIGHUP
 123          * otherwise cached access denied errors due to restrict anonymous
 124          * hang around until the sequence number changes.
 125          * NB
 126          * Skip uninitialized domains when flush cache.
 127          * If domain is not initialized, it means it is never
 128          * used or never become online. look, wcache_invalidate_cache()
 129          * -> get_cache() -> init_dc_connection(). It causes a lot of traffic
 130          * for unused domains and large traffic for primay domain's DC if there
 131          * are many domains..
 132          */
 133
 134         if (!wcache_invalidate_cache_noinit()) {
 135                 DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
 136                 if (!winbindd_cache_validate_and_initialize()) {
 137                         exit(1);
 138                 }
 139         }
 140 }
 141
 142 /* Handle the signal by unlinking socket and exiting */
 143
 144 static void terminate(bool is_parent)
 145 {
 146         if (is_parent) {
 147                 /* When parent goes away we should
 148                  * remove the socket file. Not so
 149                  * when children terminate.
 150                  */
 151                 char *path = NULL;
 152
 153                 if (asprintf(&path, "%s/%s",
 154                         get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
 155                         unlink(path);
 156                         SAFE_FREE(path);
 157                 }
 158         }
 159
 160         idmap_close();
 161
 162         trustdom_cache_shutdown();
 163
 164         gencache_stabilize();
 165
 166 #if 0
 167         if (interactive) {
 168                 TALLOC_CTX *mem_ctx = talloc_init("end_description");
 169                 char *description = talloc_describe_all(mem_ctx);
 170
 171                 DEBUG(3, ("tallocs left:\n%s\n", description));
 172                 talloc_destroy(mem_ctx);
 173         }
 174 #endif
 175
 176         if (is_parent) {
 177                 serverid_deregister(procid_self());
 178                 pidfile_unlink();
 179         }
 180
 181         exit(0);
 182 }
 183
 184 static void winbindd_sig_term_handler(struct tevent_context *ev,
 185                                       struct tevent_signal *se,
 186                                       int signum,
 187                                       int count,
 188                                       void *siginfo,
 189                                       void *private_data)
 190 {
 191         bool *is_parent = talloc_get_type_abort(private_data, bool);
 192
 193         DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
 194                  signum, (int)*is_parent));
 195         terminate(*is_parent);
 196 }
 197
 198 bool winbindd_setup_sig_term_handler(bool parent)
 199 {
 200         struct tevent_signal *se;
 201         bool *is_parent;
 202
 203         is_parent = talloc(winbind_event_context(), bool);
 204         if (!is_parent) {
 205                 return false;
 206         }
 207
 208         *is_parent = parent;
 209
 210         se = tevent_add_signal(winbind_event_context(),
 211                                is_parent,
 212                                SIGTERM, 0,
 213                                winbindd_sig_term_handler,
 214                                is_parent);
 215         if (!se) {
 216                 DEBUG(0,("failed to setup SIGTERM handler"));
 217                 talloc_free(is_parent);
 218                 return false;
 219         }
 220
 221         se = tevent_add_signal(winbind_event_context(),
 222                                is_parent,
 223                                SIGINT, 0,
 224                                winbindd_sig_term_handler,
 225                                is_parent);
 226         if (!se) {
 227                 DEBUG(0,("failed to setup SIGINT handler"));
 228                 talloc_free(is_parent);
 229                 return false;
 230         }
 231
 232         se = tevent_add_signal(winbind_event_context(),
 233                                is_parent,
 234                                SIGQUIT, 0,
 235                                winbindd_sig_term_handler,
 236                                is_parent);
 237         if (!se) {
 238                 DEBUG(0,("failed to setup SIGINT handler"));
 239                 talloc_free(is_parent);
 240                 return false;
 241         }
 242
 243         return true;
 244 }
 245
 246 static void winbindd_sig_hup_handler(struct tevent_context *ev,
 247                                      struct tevent_signal *se,
 248                                      int signum,
 249                                      int count,
 250                                      void *siginfo,
 251                                      void *private_data)
 252 {
 253         const char *file = (const char *)private_data;
 254
 255         DEBUG(1,("Reloading services after SIGHUP\n"));
 256         flush_caches_noinit();
 257         reload_services_file(file);
 258 }
 259
 260 bool winbindd_setup_sig_hup_handler(const char *lfile)
 261 {
 262         struct tevent_signal *se;
 263         char *file = NULL;
 264
 265         if (lfile) {
 266                 file = talloc_strdup(winbind_event_context(),
 267                                      lfile);
 268                 if (!file) {
 269                         return false;
 270                 }
 271         }
 272
 273         se = tevent_add_signal(winbind_event_context(),
 274                                winbind_event_context(),
 275                                SIGHUP, 0,
 276                                winbindd_sig_hup_handler,
 277                                file);
 278         if (!se) {
 279                 return false;
 280         }
 281
 282         return true;
 283 }
 284
 285 static void winbindd_sig_chld_handler(struct tevent_context *ev,
 286                                       struct tevent_signal *se,
 287                                       int signum,
 288                                       int count,
 289                                       void *siginfo,
 290                                       void *private_data)
 291 {
 292         pid_t pid;
 293
 294         while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
 295                 winbind_child_died(pid);
 296         }
 297 }
 298
 299 static bool winbindd_setup_sig_chld_handler(void)
 300 {
 301         struct tevent_signal *se;
 302
 303         se = tevent_add_signal(winbind_event_context(),
 304                                winbind_event_context(),
 305                                SIGCHLD, 0,
 306                                winbindd_sig_chld_handler,
 307                                NULL);
 308         if (!se) {
 309                 return false;
 310         }
 311
 312         return true;
 313 }
 314
 315 static void winbindd_sig_usr2_handler(struct tevent_context *ev,
 316                                       struct tevent_signal *se,
 317                                       int signum,
 318                                       int count,
 319                                       void *siginfo,
 320                                       void *private_data)
 321 {
 322         winbindd_status();
 323 }
 324
 325 static bool winbindd_setup_sig_usr2_handler(void)
 326 {
 327         struct tevent_signal *se;
 328
 329         se = tevent_add_signal(winbind_event_context(),
 330                                winbind_event_context(),
 331                                SIGUSR2, 0,
 332                                winbindd_sig_usr2_handler,
 333                                NULL);
 334         if (!se) {
 335                 return false;
 336         }
 337
 338         return true;
 339 }
 340
 341 /* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
 342 static void msg_reload_services(struct messaging_context *msg,
 343                                 void *private_data,
 344                                 uint32_t msg_type,
 345                                 struct server_id server_id,
 346                                 DATA_BLOB *data)
 347 {
 348         /* Flush various caches */
 349         flush_caches();
 350         reload_services_file((const char *) private_data);
 351 }
 352
 353 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
 354 static void msg_shutdown(struct messaging_context *msg,
 355                          void *private_data,
 356                          uint32_t msg_type,
 357                          struct server_id server_id,
 358                          DATA_BLOB *data)
 359 {
 360         /* only the parent waits for this message */
 361         DEBUG(0,("Got shutdown message\n"));
 362         terminate(true);
 363 }
 364
 365
 366 static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 367                                        void *private_data,
 368                                        uint32_t msg_type,
 369                                        struct server_id server_id,
 370                                        DATA_BLOB *data)
 371 {
 372         uint8 ret;
 373         pid_t child_pid;
 374
 375         DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
 376                    "message.\n"));
 377
 378         /*
 379          * call the validation code from a child:
 380          * so we don't block the main winbindd and the validation
 381          * code can safely use fork/waitpid...
 382          */
 383         child_pid = sys_fork();
 384
 385         if (child_pid == -1) {
 386                 DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
 387                           strerror(errno)));
 388                 return;
 389         }
 390
 391         if (child_pid != 0) {
 392                 /* parent */
 393                 DEBUG(5, ("winbind_msg_validate_cache: child created with "
 394                           "pid %d.\n", (int)child_pid));
 395                 return;
 396         }
 397
 398         /* child */
 399
 400         if (!winbindd_reinit_after_fork(NULL)) {
 401                 _exit(0);
 402         }
 403
 404         /* install default SIGCHLD handler: validation code uses fork/waitpid */
 405         CatchSignal(SIGCHLD, SIG_DFL);
 406
 407         ret = (uint8)winbindd_validate_cache_nobackup();
 408         DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
 409         messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
 410                            (size_t)1);
 411         _exit(0);
 412 }
 413
 414 static struct winbindd_dispatch_table {
 415         enum winbindd_cmd cmd;
 416         void (*fn)(struct winbindd_cli_state *state);
 417         const char *winbindd_cmd_name;
 418 } dispatch_table[] = {
 419
 420         /* Enumeration functions */
 421
 422         { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
 423           "LIST_TRUSTDOM" },
 424
 425         /* Miscellaneous */
 426
 427         { WINBINDD_INFO, winbindd_info, "INFO" },
 428         { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
 429           "INTERFACE_VERSION" },
 430         { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
 431         { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
 432         { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
 433         { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
 434           "WINBINDD_PRIV_PIPE_DIR" },
 435
 436         /* Credential cache access */
 437         { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
 438         { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 439
 440         /* WINS functions */
 441
 442         { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
 443         { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
 444
 445         /* End of list */
 446
 447         { WINBINDD_NUM_CMDS, NULL, "NONE" }
 448 };
 449
 450 struct winbindd_async_dispatch_table {
 451         enum winbindd_cmd cmd;
 452         const char *cmd_name;
 453         struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
 454                                        struct tevent_context *ev,
 455                                        struct winbindd_cli_state *cli,
 456                                        struct winbindd_request *request);
 457         NTSTATUS (*recv_req)(struct tevent_req *req,
 458                              struct winbindd_response *presp);
 459 };
 460
 461 static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
 462         { WINBINDD_PING, "PING",
 463           wb_ping_send, wb_ping_recv },
 464         { WINBINDD_LOOKUPSID, "LOOKUPSID",
 465           winbindd_lookupsid_send, winbindd_lookupsid_recv },
 466         { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
 467           winbindd_lookupname_send, winbindd_lookupname_recv },
 468         { WINBINDD_SID_TO_UID, "SID_TO_UID",
 469           winbindd_sid_to_uid_send, winbindd_sid_to_uid_recv },
 470         { WINBINDD_SID_TO_GID, "SID_TO_GID",
 471           winbindd_sid_to_gid_send, winbindd_sid_to_gid_recv },
 472         { WINBINDD_UID_TO_SID, "UID_TO_SID",
 473           winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
 474         { WINBINDD_GID_TO_SID, "GID_TO_SID",
 475           winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
 476         { WINBINDD_GETPWSID, "GETPWSID",
 477           winbindd_getpwsid_send, winbindd_getpwsid_recv },
 478         { WINBINDD_GETPWNAM, "GETPWNAM",
 479           winbindd_getpwnam_send, winbindd_getpwnam_recv },
 480         { WINBINDD_GETPWUID, "GETPWUID",
 481           winbindd_getpwuid_send, winbindd_getpwuid_recv },
 482         { WINBINDD_GETSIDALIASES, "GETSIDALIASES",
 483           winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
 484         { WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
 485           winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
 486         { WINBINDD_GETGROUPS, "GETGROUPS",
 487           winbindd_getgroups_send, winbindd_getgroups_recv },
 488         { WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
 489           winbindd_show_sequence_send, winbindd_show_sequence_recv },
 490         { WINBINDD_GETGRGID, "GETGRGID",
 491           winbindd_getgrgid_send, winbindd_getgrgid_recv },
 492         { WINBINDD_GETGRNAM, "GETGRNAM",
 493           winbindd_getgrnam_send, winbindd_getgrnam_recv },
 494         { WINBINDD_GETUSERSIDS, "GETUSERSIDS",
 495           winbindd_getusersids_send, winbindd_getusersids_recv },
 496         { WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
 497           winbindd_lookuprids_send, winbindd_lookuprids_recv },
 498         { WINBINDD_SETPWENT, "SETPWENT",
 499           winbindd_setpwent_send, winbindd_setpwent_recv },
 500         { WINBINDD_GETPWENT, "GETPWENT",
 501           winbindd_getpwent_send, winbindd_getpwent_recv },
 502         { WINBINDD_ENDPWENT, "ENDPWENT",
 503           winbindd_endpwent_send, winbindd_endpwent_recv },
 504         { WINBINDD_DSGETDCNAME, "DSGETDCNAME",
 505           winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
 506         { WINBINDD_GETDCNAME, "GETDCNAME",
 507           winbindd_getdcname_send, winbindd_getdcname_recv },
 508         { WINBINDD_SETGRENT, "SETGRENT",
 509           winbindd_setgrent_send, winbindd_setgrent_recv },
 510         { WINBINDD_GETGRENT, "GETGRENT",
 511           winbindd_getgrent_send, winbindd_getgrent_recv },
 512         { WINBINDD_ENDGRENT, "ENDGRENT",
 513           winbindd_endgrent_send, winbindd_endgrent_recv },
 514         { WINBINDD_LIST_USERS, "LIST_USERS",
 515           winbindd_list_users_send, winbindd_list_users_recv },
 516         { WINBINDD_LIST_GROUPS, "LIST_GROUPS",
 517           winbindd_list_groups_send, winbindd_list_groups_recv },
 518         { WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
 519           winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
 520         { WINBINDD_PING_DC, "PING_DC",
 521           winbindd_ping_dc_send, winbindd_ping_dc_recv },
 522         { WINBINDD_PAM_AUTH, "PAM_AUTH",
 523           winbindd_pam_auth_send, winbindd_pam_auth_recv },
 524         { WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
 525           winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
 526         { WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
 527           winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
 528         { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
 529           winbindd_pam_chng_pswd_auth_crap_send,
 530           winbindd_pam_chng_pswd_auth_crap_recv },
 531
 532         { 0, NULL, NULL, NULL }
 533 };
 534
 535 static struct winbindd_async_dispatch_table async_priv_table[] = {
 536         { WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
 537           winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
 538         { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
 539           winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
 540         { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
 541           winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
 542         { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
 543           winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
 544
 545         { 0, NULL, NULL, NULL }
 546 };
 547
 548 static void wb_request_done(struct tevent_req *req);
 549
 550 void wb_process_request(struct winbindd_cli_state *state)
 551 {
 552         struct winbindd_dispatch_table *table = dispatch_table;
 553         struct winbindd_async_dispatch_table *atable;
 554
 555         state->mem_ctx = talloc_named(state, 0, "winbind request");
 556         if (state->mem_ctx == NULL)
 557                 return;
 558
 559         /* Remember who asked us. */
 560         state->pid = state->request->pid;
 561
 562         state->cmd_name = "unknown request";
 563         state->recv_fn = NULL;
 564
 565         /* Process command */
 566
 567         for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
 568                 if (state->request->cmd == atable->cmd) {
 569                         break;
 570                 }
 571         }
 572
 573         if ((atable->send_req == NULL) && state->privileged) {
 574                 for (atable = async_priv_table; atable->send_req;
 575                      atable += 1) {
 576                         if (state->request->cmd == atable->cmd) {
 577                                 break;
 578                         }
 579                 }
 580         }
 581
 582         if (atable->send_req != NULL) {
 583                 struct tevent_req *req;
 584
 585                 state->cmd_name = atable->cmd_name;
 586                 state->recv_fn = atable->recv_req;
 587
 588                 DEBUG(10, ("wb_process_request: Handling async request %d:%s\n",
 589                            (int)state->pid, state->cmd_name));
 590
 591                 req = atable->send_req(state->mem_ctx, winbind_event_context(),
 592                                        state, state->request);
 593                 if (req == NULL) {
 594                         DEBUG(0, ("wb_process_request: atable->send failed for "
 595                                   "%s\n", atable->cmd_name));
 596                         request_error(state);
 597                         return;
 598                 }
 599                 tevent_req_set_callback(req, wb_request_done, state);
 600                 return;
 601         }
 602
 603         state->response = talloc_zero(state->mem_ctx,
 604                                       struct winbindd_response);
 605         if (state->response == NULL) {
 606                 DEBUG(10, ("talloc failed\n"));
 607                 winbindd_remove_client(state);
 608                 return;
 609         }
 610         state->response->result = WINBINDD_PENDING;
 611         state->response->length = sizeof(struct winbindd_response);
 612
 613         for (table = dispatch_table; table->fn; table++) {
 614                 if (state->request->cmd == table->cmd) {
 615                         DEBUG(10,("wb_process_request: request fn %s\n",
 616                                   table->winbindd_cmd_name ));
 617                         state->cmd_name = table->winbindd_cmd_name;
 618                         table->fn(state);
 619                         break;
 620                 }
 621         }
 622
 623         if (!table->fn) {
 624                 DEBUG(10,("wb_process_request: unknown request fn number %d\n",
 625                           (int)state->request->cmd ));
 626                 request_error(state);
 627         }
 628 }
 629
 630 static void wb_request_done(struct tevent_req *req)
 631 {
 632         struct winbindd_cli_state *state = tevent_req_callback_data(
 633                 req, struct winbindd_cli_state);
 634         NTSTATUS status;
 635
 636         state->response = talloc_zero(state->mem_ctx,
 637                                       struct winbindd_response);
 638         if (state->response == NULL) {
 639                 DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
 640                           (int)state->pid, state->cmd_name));
 641                 winbindd_remove_client(state);
 642                 return;
 643         }
 644         state->response->result = WINBINDD_PENDING;
 645         state->response->length = sizeof(struct winbindd_response);
 646
 647         status = state->recv_fn(req, state->response);
 648         TALLOC_FREE(req);
 649
 650         DEBUG(10,("wb_request_done[%d:%s]: %s\n",
 651                   (int)state->pid, state->cmd_name, nt_errstr(status)));
 652
 653         if (!NT_STATUS_IS_OK(status)) {
 654                 request_error(state);
 655                 return;
 656         }
 657         request_ok(state);
 658 }
 659
 660 void request_error(struct winbindd_cli_state *state)
 661 {
 662         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 663         state->response->result = WINBINDD_ERROR;
 664         request_finished(state);
 665 }
 666
 667 void request_ok(struct winbindd_cli_state *state)
 668 {
 669         SMB_ASSERT(state->response->result == WINBINDD_PENDING);
 670         state->response->result = WINBINDD_OK;
 671         request_finished(state);
 672 }
 673
 674 bool winbindd_use_idmap_cache(void)
 675 {
 676         return !opt_nocache;
 677 }
 678
 679 bool winbindd_use_cache(void)
 680 {
 681         return !opt_nocache;
 682 }
 683
 684 void winbindd_register_handlers(void)
 685 {
 686         struct tevent_timer *te;
 687         /* Setup signal handlers */
 688
 689         if (!winbindd_setup_sig_term_handler(true))
 690                 exit(1);
 691         if (!winbindd_setup_sig_hup_handler(NULL))
 692                 exit(1);
 693         if (!winbindd_setup_sig_chld_handler())
 694                 exit(1);
 695         if (!winbindd_setup_sig_usr2_handler())
 696                 exit(1);
 697
 698         CatchSignal(SIGPIPE, SIG_IGN);                 /* Ignore sigpipe */
 699
 700         /*
 701          * Ensure all cache and idmap caches are consistent
 702          * and initialized before we startup.
 703          */
 704         if (!winbindd_cache_validate_and_initialize()) {
 705                 exit(1);
 706         }
 707
 708         /* get broadcast messages */
 709
 710         if (!serverid_register(procid_self(),
 711                                FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
 712                 DEBUG(1, ("Could not register myself in serverid.tdb\n"));
 713                 exit(1);
 714         }
 715
 716         /* React on 'smbcontrol winbindd reload-config' in the same way
 717            as to SIGHUP signal */
 718         messaging_register(winbind_messaging_context(), NULL,
 719                            MSG_SMB_CONF_UPDATED, msg_reload_services);
 720         messaging_register(winbind_messaging_context(), NULL,
 721                            MSG_SHUTDOWN, msg_shutdown);
 722
 723         /* Handle online/offline messages. */
 724         messaging_register(winbind_messaging_context(), NULL,
 725                            MSG_WINBIND_OFFLINE, winbind_msg_offline);
 726         messaging_register(winbind_messaging_context(), NULL,
 727                            MSG_WINBIND_ONLINE, winbind_msg_online);
 728         messaging_register(winbind_messaging_context(), NULL,
 729                            MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
 730
 731         messaging_register(winbind_messaging_context(), NULL,
 732                            MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
 733
 734         messaging_register(winbind_messaging_context(), NULL,
 735                            MSG_WINBIND_VALIDATE_CACHE,
 736                            winbind_msg_validate_cache);
 737
 738         messaging_register(winbind_messaging_context(), NULL,
 739                            MSG_WINBIND_DUMP_DOMAIN_LIST,
 740                            winbind_msg_dump_domain_list);
 741
 742         /* Register handler for MSG_DEBUG. */
 743         messaging_register(winbind_messaging_context(), NULL,
 744                            MSG_DEBUG,
 745                            winbind_msg_debug);
 746
 747         netsamlogon_cache_init(); /* Non-critical */
 748
 749         /* clear the cached list of trusted domains */
 750
 751         wcache_tdc_clear();
 752
 753         if (!init_domain_list()) {
 754                 DEBUG(0,("unable to initialize domain list\n"));
 755                 exit(1);
 756         }
 757
 758         init_idmap_child();
 759         init_locator_child();
 760
 761         smb_nscd_flush_user_cache();
 762         smb_nscd_flush_group_cache();
 763
 764         te = tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
 765                               rescan_trusted_domains, NULL);
 766         if (te == NULL) {
 767                 DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
 768                 exit(1);
 769         }
 770
 771 }
 772
 773 /* Main function */
 774
 775 int main(int argc, char **argv, char **envp)
 776 {
 777         static bool is_daemon = False;
 778         static bool Fork = True;
 779         static bool log_stdout = False;
 780         static bool no_process_group = False;
 781         enum {
 782                 OPT_DAEMON = 1000,
 783                 OPT_FORK,
 784                 OPT_NO_PROCESS_GROUP,
 785                 OPT_LOG_STDOUT
 786         };
 787         struct poptOption long_options[] = {
 788                 POPT_AUTOHELP
 789                 { "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
 790                 { "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
 791                 { "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
 792                 { "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
 793                 { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
 794                 { "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
 795                 POPT_COMMON_SAMBA
 796                 POPT_TABLEEND
 797         };
 798         poptContext pc;
 799         int opt;
 800         TALLOC_CTX *frame = talloc_stackframe();
 801         NTSTATUS status;
 802
 803         /* glibc (?) likes to print "User defined signal 1" and exit if a
 804            SIGUSR[12] is received before a handler is installed */
 805
 806         CatchSignal(SIGUSR1, SIG_IGN);
 807         CatchSignal(SIGUSR2, SIG_IGN);
 808
 809         fault_setup((void (*)(void *))fault_quit );
 810         dump_core_setup("winbindd");
 811
 812         load_case_tables();
 813
 814         /* Initialise for running in non-root mode */
 815
 816         sec_init();
 817
 818         set_remote_machine_name("winbindd", False);
 819
 820         /* Set environment variable so we don't recursively call ourselves.
 821            This may also be useful interactively. */
 822
 823         if ( !winbind_off() ) {
 824                 DEBUG(0,("Failed to disable recusive winbindd calls.  Exiting.\n"));
 825                 exit(1);
 826         }
 827
 828         /* Initialise samba/rpc client stuff */
 829
 830         pc = poptGetContext("winbindd", argc, (const char **)argv, long_options, 0);
 831
 832         while ((opt = poptGetNextOpt(pc)) != -1) {
 833                 switch (opt) {
 834                         /* Don't become a daemon */
 835                 case OPT_DAEMON:
 836                         is_daemon = True;
 837                         break;
 838                 case 'i':
 839                         interactive = True;
 840                         log_stdout = True;
 841                         Fork = False;
 842                         break;
 843                 case OPT_FORK:
 844                         Fork = false;
 845                         break;
 846                 case OPT_NO_PROCESS_GROUP:
 847                         no_process_group = true;
 848                         break;
 849                 case OPT_LOG_STDOUT:
 850                         log_stdout = true;
 851                         break;
 852                 case 'n':
 853                         opt_nocache = true;
 854                         break;
 855                 default:
 856                         d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
 857                                   poptBadOption(pc, 0), poptStrerror(opt));
 858                         poptPrintUsage(pc, stderr, 0);
 859                         exit(1);
 860                 }
 861         }
 862
 863         if (is_daemon && interactive) {
 864                 d_fprintf(stderr,"\nERROR: "
 865                           "Option -i|--interactive is not allowed together with -D|--daemon\n\n");
 866                 poptPrintUsage(pc, stderr, 0);
 867                 exit(1);
 868         }
 869
 870         if (log_stdout && Fork) {
 871                 d_fprintf(stderr, "\nERROR: "
 872                           "Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
 873                 poptPrintUsage(pc, stderr, 0);
 874                 exit(1);
 875         }
 876
 877         poptFreeContext(pc);
 878
 879         if (!override_logfile) {
 880                 char *lfile = NULL;
 881                 if (asprintf(&lfile,"%s/log.winbindd",
 882                                 get_dyn_LOGFILEBASE()) > 0) {
 883                         lp_set_logfile(lfile);
 884                         SAFE_FREE(lfile);
 885                 }
 886         }
 887         setup_logging("winbindd", log_stdout);
 888         reopen_logs();
 889
 890         DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
 891         DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
 892
 893         if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
 894                 DEBUG(0, ("error opening config file\n"));
 895                 exit(1);
 896         }
 897
 898         /* Initialise messaging system */
 899
 900         if (winbind_messaging_context() == NULL) {
 901                 exit(1);
 902         }
 903
 904         if (!reload_services_file(NULL)) {
 905                 DEBUG(0, ("error opening config file\n"));
 906                 exit(1);
 907         }
 908
 909         if (!directory_exist(lp_lockdir())) {
 910                 mkdir(lp_lockdir(), 0755);
 911         }
 912
 913         /* Setup names. */
 914
 915         if (!init_names())
 916                 exit(1);
 917
 918         load_interfaces();
 919
 920         if (!secrets_init()) {
 921
 922                 DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
 923                 return False;
 924         }
 925
 926         /* Unblock all signals we are interested in as they may have been
 927            blocked by the parent process. */
 928
 929         BlockSignals(False, SIGINT);
 930         BlockSignals(False, SIGQUIT);
 931         BlockSignals(False, SIGTERM);
 932         BlockSignals(False, SIGUSR1);
 933         BlockSignals(False, SIGUSR2);
 934         BlockSignals(False, SIGHUP);
 935         BlockSignals(False, SIGCHLD);
 936
 937         if (!interactive)
 938                 become_daemon(Fork, no_process_group, log_stdout);
 939
 940         pidfile_create("winbindd");
 941
 942 #if HAVE_SETPGID
 943         /*
 944          * If we're interactive we want to set our own process group for
 945          * signal management.
 946          */
 947         if (interactive && !no_process_group)
 948                 setpgid( (pid_t)0, (pid_t)0);
 949 #endif
 950
 951         TimeInit();
 952
 953         /* Don't use winbindd_reinit_after_fork here as
 954          * we're just starting up and haven't created any
 955          * winbindd-specific resources we must free yet. JRA.
 956          */
 957
 958         status = reinit_after_fork(winbind_messaging_context(),
 959                                    winbind_event_context(),
 960                                    procid_self(), false);
 961         if (!NT_STATUS_IS_OK(status)) {
 962                 DEBUG(0,("reinit_after_fork() failed\n"));
 963                 exit(1);
 964         }
 965
 966         winbindd_register_handlers();
 967
 968         rpc_lsarpc_init(NULL);
 969         rpc_samr_init(NULL);
 970
 971         if (!init_system_info()) {
 972                 DEBUG(0,("ERROR: failed to setup system user info.\n"));
 973                 exit(1);
 974         }
 975
 976         /* setup listen sockets */
 977
 978         if (!winbindd_setup_listeners()) {
 979                 DEBUG(0,("winbindd_setup_listeners() failed\n"));
 980                 exit(1);
 981         }
 982
 983         TALLOC_FREE(frame);
 984         /* Loop waiting for requests */
 985         while (1) {
 986                 frame = talloc_stackframe();
 987
 988                 if (tevent_loop_once(winbind_event_context()) == -1) {
 989                         DEBUG(1, ("tevent_loop_once() failed: %s\n",
 990                                   strerror(errno)));
 991                         return 1;
 992                 }
 993
 994                 TALLOC_FREE(frame);
 995         }
 996
 997         return 0;
 998 }