source3/winbindd/winbindd_dual.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind child daemons
   5
   6    Copyright (C) Andrew Tridgell 2002
   7    Copyright (C) Volker Lendecke 2004,2005
   8
   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 3 of the License, or
  12    (at your option) any later version.
  13
  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.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 /*
  24  * We fork a child per domain to be able to act non-blocking in the main
  25  * winbind daemon. A domain controller thousands of miles away being being
  26  * slow replying with a 10.000 user list should not hold up netlogon calls
  27  * that can be handled locally.
  28  */
  29
  30 #include "includes.h"
  31 #include "winbindd.h"
  32 #include "../../nsswitch/libwbclient/wbc_async.h"
  33
  34 #undef DBGC_CLASS
  35 #define DBGC_CLASS DBGC_WINBIND
  36
  37 extern bool override_logfile;
  38 extern struct winbindd_methods cache_methods;
  39
  40 /* Read some data from a client connection */
  41
  42 static NTSTATUS child_read_request(struct winbindd_cli_state *state)
  43 {
  44         NTSTATUS status;
  45
  46         /* Read data */
  47
  48         status = read_data(state->sock, (char *)state->request,
  49                            sizeof(*state->request));
  50
  51         if (!NT_STATUS_IS_OK(status)) {
  52                 DEBUG(3, ("child_read_request: read_data failed: %s\n",
  53                           nt_errstr(status)));
  54                 return status;
  55         }
  56
  57         if (state->request->extra_len == 0) {
  58                 state->request->extra_data.data = NULL;
  59                 return NT_STATUS_OK;
  60         }
  61
  62         DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request->extra_len));
  63
  64         state->request->extra_data.data =
  65                 SMB_MALLOC_ARRAY(char, state->request->extra_len + 1);
  66
  67         if (state->request->extra_data.data == NULL) {
  68                 DEBUG(0, ("malloc failed\n"));
  69                 return NT_STATUS_NO_MEMORY;
  70         }
  71
  72         /* Ensure null termination */
  73         state->request->extra_data.data[state->request->extra_len] = '\0';
  74
  75         status= read_data(state->sock, state->request->extra_data.data,
  76                           state->request->extra_len);
  77
  78         if (!NT_STATUS_IS_OK(status)) {
  79                 DEBUG(0, ("Could not read extra data: %s\n",
  80                           nt_errstr(status)));
  81         }
  82         return status;
  83 }
  84
  85 /*
  86  * Do winbind child async request. This is not simply wb_simple_trans. We have
  87  * to do the queueing ourselves because while a request is queued, the child
  88  * might have crashed, and we have to re-fork it in the _trigger function.
  89  */
  90
  91 struct wb_child_request_state {
  92         struct tevent_context *ev;
  93         struct winbindd_child *child;
  94         struct winbindd_request *request;
  95         struct winbindd_response *response;
  96 };
  97
  98 static bool fork_domain_child(struct winbindd_child *child);
  99
 100 static void wb_child_request_trigger(struct tevent_req *req,
 101                                             void *private_data);
 102 static void wb_child_request_done(struct tevent_req *subreq);
 103
 104 struct tevent_req *wb_child_request_send(TALLOC_CTX *mem_ctx,
 105                                          struct tevent_context *ev,
 106                                          struct winbindd_child *child,
 107                                          struct winbindd_request *request)
 108 {
 109         struct tevent_req *req;
 110         struct wb_child_request_state *state;
 111
 112         req = tevent_req_create(mem_ctx, &state,
 113                                 struct wb_child_request_state);
 114         if (req == NULL) {
 115                 return NULL;
 116         }
 117
 118         state->ev = ev;
 119         state->child = child;
 120         state->request = request;
 121
 122         if (!tevent_queue_add(child->queue, ev, req,
 123                               wb_child_request_trigger, NULL)) {
 124                 tevent_req_nomem(NULL, req);
 125                 return tevent_req_post(req, ev);
 126         }
 127         return req;
 128 }
 129
 130 static void wb_child_request_trigger(struct tevent_req *req,
 131                                      void *private_data)
 132 {
 133         struct wb_child_request_state *state = tevent_req_data(
 134                 req, struct wb_child_request_state);
 135         struct tevent_req *subreq;
 136
 137         if ((state->child->pid == 0) && (!fork_domain_child(state->child))) {
 138                 tevent_req_error(req, errno);
 139                 return;
 140         }
 141
 142         subreq = wb_simple_trans_send(state, winbind_event_context(), NULL,
 143                                       state->child->sock, state->request);
 144         if (tevent_req_nomem(subreq, req)) {
 145                 return;
 146         }
 147         tevent_req_set_callback(subreq, wb_child_request_done, req);
 148
 149         if (!tevent_req_set_endtime(req, state->ev,
 150                                     timeval_current_ofs(300, 0))) {
 151                 tevent_req_nomem(NULL, req);
 152                 return;
 153         }
 154 }
 155
 156 static void wb_child_request_done(struct tevent_req *subreq)
 157 {
 158         struct tevent_req *req = tevent_req_callback_data(
 159                 subreq, struct tevent_req);
 160         struct wb_child_request_state *state = tevent_req_data(
 161                 req, struct wb_child_request_state);
 162         int ret, err;
 163
 164         ret = wb_simple_trans_recv(subreq, state, &state->response, &err);
 165         TALLOC_FREE(subreq);
 166         if (ret == -1) {
 167                 tevent_req_error(req, err);
 168                 return;
 169         }
 170         tevent_req_done(req);
 171 }
 172
 173 int wb_child_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 174                           struct winbindd_response **presponse, int *err)
 175 {
 176         struct wb_child_request_state *state = tevent_req_data(
 177                 req, struct wb_child_request_state);
 178
 179         if (tevent_req_is_unix_error(req, err)) {
 180                 return -1;
 181         }
 182         if (state->response->result != WINBINDD_OK) {
 183                 *err = EIO; /* EIO doesn't fit, but what would be better? */
 184                 return -1;
 185         }
 186         *presponse = talloc_move(mem_ctx, &state->response);
 187         return 0;
 188 }
 189
 190 struct wb_domain_request_state {
 191         struct tevent_context *ev;
 192         struct winbindd_domain *domain;
 193         struct winbindd_request *request;
 194         struct winbindd_request *init_req;
 195         struct winbindd_response *response;
 196 };
 197
 198 static void wb_domain_request_gotdc(struct tevent_req *subreq);
 199 static void wb_domain_request_initialized(struct tevent_req *subreq);
 200 static void wb_domain_request_done(struct tevent_req *subreq);
 201
 202 struct tevent_req *wb_domain_request_send(TALLOC_CTX *mem_ctx,
 203                                           struct tevent_context *ev,
 204                                           struct winbindd_domain *domain,
 205                                           struct winbindd_request *request)
 206 {
 207         struct tevent_req *req, *subreq;
 208         struct wb_domain_request_state *state;
 209
 210         req = tevent_req_create(mem_ctx, &state,
 211                                 struct wb_domain_request_state);
 212         if (req == NULL) {
 213                 return NULL;
 214         }
 215
 216         if (domain->initialized) {
 217                 subreq = wb_child_request_send(state, ev, &domain->child,
 218                                                request);
 219                 if (tevent_req_nomem(subreq, req)) {
 220                         return tevent_req_post(req, ev);
 221                 }
 222                 tevent_req_set_callback(subreq, wb_domain_request_done, req);
 223                 return req;
 224         }
 225
 226         state->domain = domain;
 227         state->ev = ev;
 228         state->request = request;
 229
 230         state->init_req = talloc_zero(state, struct winbindd_request);
 231         if (tevent_req_nomem(state->init_req, req)) {
 232                 return tevent_req_post(req, ev);
 233         }
 234
 235         if (IS_DC || domain->primary || domain->internal) {
 236                 /* The primary domain has to find the DC name itself */
 237                 state->init_req->cmd = WINBINDD_INIT_CONNECTION;
 238                 fstrcpy(state->init_req->domain_name, domain->name);
 239                 state->init_req->data.init_conn.is_primary =
 240                         domain->primary ? true : false;
 241                 fstrcpy(state->init_req->data.init_conn.dcname, "");
 242
 243                 subreq = wb_child_request_send(state, ev, &domain->child,
 244                                                state->init_req);
 245                 if (tevent_req_nomem(subreq, req)) {
 246                         return tevent_req_post(req, ev);
 247                 }
 248                 tevent_req_set_callback(subreq, wb_domain_request_initialized,
 249                                         req);
 250                 return req;
 251         }
 252
 253         /*
 254          * Ask our DC for a DC name
 255          */
 256         domain = find_our_domain();
 257
 258         /* This is *not* the primary domain, let's ask our DC about a DC
 259          * name */
 260
 261         state->init_req->cmd = WINBINDD_GETDCNAME;
 262         fstrcpy(state->init_req->domain_name, domain->name);
 263
 264         subreq = wb_child_request_send(state, ev, &domain->child, request);
 265         if (tevent_req_nomem(subreq, req)) {
 266                 return tevent_req_post(req, ev);
 267         }
 268         tevent_req_set_callback(subreq, wb_domain_request_gotdc, req);
 269         return req;
 270 }
 271
 272 static void wb_domain_request_gotdc(struct tevent_req *subreq)
 273 {
 274         struct tevent_req *req = tevent_req_callback_data(
 275                 subreq, struct tevent_req);
 276         struct wb_domain_request_state *state = tevent_req_data(
 277                 req, struct wb_domain_request_state);
 278         struct winbindd_response *response;
 279         int ret, err;
 280
 281         ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
 282         TALLOC_FREE(subreq);
 283         if (ret == -1) {
 284                 tevent_req_error(req, err);
 285                 return;
 286         }
 287         state->init_req->cmd = WINBINDD_INIT_CONNECTION;
 288         fstrcpy(state->init_req->domain_name, state->domain->name);
 289         state->init_req->data.init_conn.is_primary = False;
 290         fstrcpy(state->init_req->data.init_conn.dcname,
 291                 response->data.dc_name);
 292
 293         TALLOC_FREE(response);
 294
 295         subreq = wb_child_request_send(state, state->ev, &state->domain->child,
 296                                        state->init_req);
 297         if (tevent_req_nomem(subreq, req)) {
 298                 return;
 299         }
 300         tevent_req_set_callback(subreq, wb_domain_request_initialized, req);
 301 }
 302
 303 static void wb_domain_request_initialized(struct tevent_req *subreq)
 304 {
 305         struct tevent_req *req = tevent_req_callback_data(
 306                 subreq, struct tevent_req);
 307         struct wb_domain_request_state *state = tevent_req_data(
 308                 req, struct wb_domain_request_state);
 309         struct winbindd_response *response;
 310         int ret, err;
 311
 312         ret = wb_child_request_recv(subreq, talloc_tos(), &response, &err);
 313         TALLOC_FREE(subreq);
 314         if (ret == -1) {
 315                 tevent_req_error(req, err);
 316                 return;
 317         }
 318
 319         if (!string_to_sid(&state->domain->sid,
 320                            response->data.domain_info.sid)) {
 321                 DEBUG(1,("init_child_recv: Could not convert sid %s "
 322                         "from string\n", response->data.domain_info.sid));
 323                 tevent_req_error(req, EINVAL);
 324                 return;
 325         }
 326         fstrcpy(state->domain->name, response->data.domain_info.name);
 327         fstrcpy(state->domain->alt_name, response->data.domain_info.alt_name);
 328         state->domain->native_mode = response->data.domain_info.native_mode;
 329         state->domain->active_directory =
 330                 response->data.domain_info.active_directory;
 331         state->domain->initialized = true;
 332
 333         TALLOC_FREE(response);
 334
 335         subreq = wb_child_request_send(state, state->ev, &state->domain->child,
 336                                        state->request);
 337         if (tevent_req_nomem(subreq, req)) {
 338                 return;
 339         }
 340         tevent_req_set_callback(subreq, wb_domain_request_done, req);
 341 }
 342
 343 static void wb_domain_request_done(struct tevent_req *subreq)
 344 {
 345         struct tevent_req *req = tevent_req_callback_data(
 346                 subreq, struct tevent_req);
 347         struct wb_domain_request_state *state = tevent_req_data(
 348                 req, struct wb_domain_request_state);
 349         int ret, err;
 350
 351         ret = wb_child_request_recv(subreq, talloc_tos(), &state->response,
 352                                     &err);
 353         TALLOC_FREE(subreq);
 354         if (ret == -1) {
 355                 tevent_req_error(req, err);
 356                 return;
 357         }
 358         tevent_req_done(req);
 359 }
 360
 361 int wb_domain_request_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 362                            struct winbindd_response **presponse, int *err)
 363 {
 364         struct wb_domain_request_state *state = tevent_req_data(
 365                 req, struct wb_domain_request_state);
 366
 367         if (tevent_req_is_unix_error(req, err)) {
 368                 return -1;
 369         }
 370         *presponse = talloc_move(mem_ctx, &state->response);
 371         return 0;
 372 }
 373
 374 /*
 375  * Machinery for async requests sent to children. You set up a
 376  * winbindd_request, select a child to query, and issue a async_request
 377  * call. When the request is completed, the callback function you specified is
 378  * called back with the private pointer you gave to async_request.
 379  */
 380
 381 struct winbindd_async_request {
 382         struct winbindd_async_request *next, *prev;
 383         TALLOC_CTX *mem_ctx;
 384         struct winbindd_child *child;
 385         struct winbindd_response *response;
 386         void (*continuation)(void *private_data, bool success);
 387         struct timed_event *reply_timeout_event;
 388         pid_t child_pid; /* pid of the child we're waiting on. Used to detect
 389                             a restart of the child (child->pid != child_pid). */
 390         void *private_data;
 391 };
 392
 393 static bool fork_domain_child(struct winbindd_child *child);
 394 static void async_request_done(struct tevent_req *req);
 395
 396 void async_request(TALLOC_CTX *mem_ctx, struct winbindd_child *child,
 397                    struct winbindd_request *request,
 398                    struct winbindd_response *response,
 399                    void (*continuation)(void *private_data, bool success),
 400                    void *private_data)
 401 {
 402         struct winbindd_async_request *state;
 403         struct tevent_req *req;
 404
 405         DEBUG(10, ("Sending request to child pid %d (domain=%s)\n",
 406                    (int)child->pid,
 407                    (child->domain != NULL) ? child->domain->name : "''"));
 408
 409         state = talloc(mem_ctx, struct winbindd_async_request);
 410         if (state == NULL) {
 411                 DEBUG(0, ("talloc failed\n"));
 412                 continuation(private_data, False);
 413                 return;
 414         }
 415
 416         state->mem_ctx = mem_ctx;
 417         state->child = child;
 418         state->reply_timeout_event = NULL;
 419         state->response = response;
 420         state->continuation = continuation;
 421         state->private_data = private_data;
 422
 423         request->pid = child->pid;
 424
 425         req = wb_child_request_send(state, winbind_event_context(),
 426                                            child, request);
 427         if (req == NULL) {
 428                 DEBUG(0, ("wb_child_request_send failed\n"));
 429                 continuation(private_data, false);
 430                 return;
 431         }
 432         tevent_req_set_callback(req, async_request_done, state);
 433 }
 434
 435 static void async_request_done(struct tevent_req *req)
 436 {
 437         struct winbindd_async_request *state = tevent_req_callback_data(
 438                 req, struct winbindd_async_request);
 439         struct winbindd_response *response;
 440         int ret, err;
 441
 442         ret = wb_child_request_recv(req, state, &response, &err);
 443         TALLOC_FREE(req);
 444         if (ret == -1) {
 445                 DEBUG(2, ("wb_child_request_recv failed: %s\n",
 446                           strerror(err)));
 447                 state->continuation(state->private_data, false);
 448                 return;
 449         }
 450         *state->response = *response;
 451         state->continuation(state->private_data, true);
 452 }
 453
 454 struct domain_request_state {
 455         struct winbindd_domain *domain;
 456         struct winbindd_request *request;
 457         struct winbindd_response *response;
 458         void (*continuation)(void *private_data_data, bool success);
 459         void *private_data_data;
 460 };
 461
 462 static void async_domain_request_done(struct tevent_req *req);
 463
 464 void async_domain_request(TALLOC_CTX *mem_ctx,
 465                           struct winbindd_domain *domain,
 466                           struct winbindd_request *request,
 467                           struct winbindd_response *response,
 468                           void (*continuation)(void *private_data_data, bool success),
 469                           void *private_data_data)
 470 {
 471         struct tevent_req *subreq;
 472         struct domain_request_state *state;
 473
 474         state = TALLOC_P(mem_ctx, struct domain_request_state);
 475         if (state == NULL) {
 476                 DEBUG(0, ("talloc failed\n"));
 477                 continuation(private_data_data, False);
 478                 return;
 479         }
 480
 481         state->domain = domain;
 482         state->request = request;
 483         state->response = response;
 484         state->continuation = continuation;
 485         state->private_data_data = private_data_data;
 486
 487         subreq = wb_domain_request_send(state, winbind_event_context(),
 488                                         domain, request);
 489         if (subreq == NULL) {
 490                 DEBUG(5, ("wb_domain_request_send failed\n"));
 491                 continuation(private_data_data, false);
 492                 return;
 493         }
 494         tevent_req_set_callback(subreq, async_domain_request_done, state);
 495 }
 496
 497 static void async_domain_request_done(struct tevent_req *req)
 498 {
 499         struct domain_request_state *state = tevent_req_callback_data(
 500                 req, struct domain_request_state);
 501         struct winbindd_response *response;
 502         int ret, err;
 503
 504         ret = wb_domain_request_recv(req, state, &response, &err);
 505         TALLOC_FREE(req);
 506         if (ret == -1) {
 507                 DEBUG(5, ("wb_domain_request returned %s\n", strerror(err)));
 508                 state->continuation(state->private_data_data, false);
 509                 return;
 510         }
 511         *(state->response) = *response;
 512         state->continuation(state->private_data_data, true);
 513 }
 514
 515 static void recvfrom_child(void *private_data_data, bool success)
 516 {
 517         struct winbindd_cli_state *state =
 518                 talloc_get_type_abort(private_data_data, struct winbindd_cli_state);
 519         enum winbindd_result result = state->response->result;
 520
 521         /* This is an optimization: The child has written directly to the
 522          * response buffer. The request itself is still in pending state,
 523          * state that in the result code. */
 524
 525         state->response->result = WINBINDD_PENDING;
 526
 527         if ((!success) || (result != WINBINDD_OK)) {
 528                 request_error(state);
 529                 return;
 530         }
 531
 532         request_ok(state);
 533 }
 534
 535 void sendto_child(struct winbindd_cli_state *state,
 536                   struct winbindd_child *child)
 537 {
 538         async_request(state->mem_ctx, child, state->request,
 539                       state->response, recvfrom_child, state);
 540 }
 541
 542 void sendto_domain(struct winbindd_cli_state *state,
 543                    struct winbindd_domain *domain)
 544 {
 545         async_domain_request(state->mem_ctx, domain,
 546                              state->request, state->response,
 547                              recvfrom_child, state);
 548 }
 549
 550 static void child_process_request(struct winbindd_child *child,
 551                                   struct winbindd_cli_state *state)
 552 {
 553         struct winbindd_domain *domain = child->domain;
 554         const struct winbindd_child_dispatch_table *table = child->table;
 555
 556         /* Free response data - we may be interrupted and receive another
 557            command before being able to send this data off. */
 558
 559         state->response->result = WINBINDD_ERROR;
 560         state->response->length = sizeof(struct winbindd_response);
 561
 562         /* as all requests in the child are sync, we can use talloc_tos() */
 563         state->mem_ctx = talloc_tos();
 564
 565         /* Process command */
 566
 567         for (; table->name; table++) {
 568                 if (state->request->cmd == table->struct_cmd) {
 569                         DEBUG(10,("child_process_request: request fn %s\n",
 570                                   table->name));
 571                         state->response->result = table->struct_fn(domain, state);
 572                         return;
 573                 }
 574         }
 575
 576         DEBUG(1 ,("child_process_request: unknown request fn number %d\n",
 577                   (int)state->request->cmd));
 578         state->response->result = WINBINDD_ERROR;
 579 }
 580
 581 void setup_child(struct winbindd_child *child,
 582                  const struct winbindd_child_dispatch_table *table,
 583                  const char *logprefix,
 584                  const char *logname)
 585 {
 586         if (logprefix && logname) {
 587                 if (asprintf(&child->logfilename, "%s/%s-%s",
 588                              get_dyn_LOGFILEBASE(), logprefix, logname) < 0) {
 589                         smb_panic("Internal error: asprintf failed");
 590                 }
 591         } else {
 592                 smb_panic("Internal error: logprefix == NULL && "
 593                           "logname == NULL");
 594         }
 595
 596         child->domain = NULL;
 597         child->table = table;
 598         child->queue = tevent_queue_create(NULL, "winbind_child");
 599         SMB_ASSERT(child->queue != NULL);
 600 }
 601
 602 struct winbindd_child *children = NULL;
 603
 604 void winbind_child_died(pid_t pid)
 605 {
 606         struct winbindd_child *child;
 607
 608         for (child = children; child != NULL; child = child->next) {
 609                 if (child->pid == pid) {
 610                         break;
 611                 }
 612         }
 613
 614         if (child == NULL) {
 615                 DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid));
 616                 return;
 617         }
 618
 619         /* This will be re-added in fork_domain_child() */
 620
 621         DLIST_REMOVE(children, child);
 622
 623         close(child->sock);
 624         child->sock = -1;
 625         child->pid = 0;
 626 }
 627
 628 /* Ensure any negative cache entries with the netbios or realm names are removed. */
 629
 630 void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
 631 {
 632         flush_negative_conn_cache_for_domain(domain->name);
 633         if (*domain->alt_name) {
 634                 flush_negative_conn_cache_for_domain(domain->alt_name);
 635         }
 636 }
 637
 638 /*
 639  * Parent winbindd process sets its own debug level first and then
 640  * sends a message to all the winbindd children to adjust their debug
 641  * level to that of parents.
 642  */
 643
 644 void winbind_msg_debug(struct messaging_context *msg_ctx,
 645                          void *private_data,
 646                          uint32_t msg_type,
 647                          struct server_id server_id,
 648                          DATA_BLOB *data)
 649 {
 650         struct winbindd_child *child;
 651
 652         DEBUG(10,("winbind_msg_debug: got debug message.\n"));
 653
 654         debug_message(msg_ctx, private_data, MSG_DEBUG, server_id, data);
 655
 656         for (child = children; child != NULL; child = child->next) {
 657
 658                 DEBUG(10,("winbind_msg_debug: sending message to pid %u.\n",
 659                         (unsigned int)child->pid));
 660
 661                 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
 662                            MSG_DEBUG,
 663                            data->data,
 664                            strlen((char *) data->data) + 1);
 665         }
 666 }
 667
 668 /* Set our domains as offline and forward the offline message to our children. */
 669
 670 void winbind_msg_offline(struct messaging_context *msg_ctx,
 671                          void *private_data,
 672                          uint32_t msg_type,
 673                          struct server_id server_id,
 674                          DATA_BLOB *data)
 675 {
 676         struct winbindd_child *child;
 677         struct winbindd_domain *domain;
 678
 679         DEBUG(10,("winbind_msg_offline: got offline message.\n"));
 680
 681         if (!lp_winbind_offline_logon()) {
 682                 DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
 683                 return;
 684         }
 685
 686         /* Set our global state as offline. */
 687         if (!set_global_winbindd_state_offline()) {
 688                 DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
 689                 return;
 690         }
 691
 692         /* Set all our domains as offline. */
 693         for (domain = domain_list(); domain; domain = domain->next) {
 694                 if (domain->internal) {
 695                         continue;
 696                 }
 697                 DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
 698                 set_domain_offline(domain);
 699         }
 700
 701         for (child = children; child != NULL; child = child->next) {
 702                 /* Don't send message to internal childs.  We've already
 703                    done so above. */
 704                 if (!child->domain || winbindd_internal_child(child)) {
 705                         continue;
 706                 }
 707
 708                 /* Or internal domains (this should not be possible....) */
 709                 if (child->domain->internal) {
 710                         continue;
 711                 }
 712
 713                 /* Each winbindd child should only process requests for one domain - make sure
 714                    we only set it online / offline for that domain. */
 715
 716                 DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
 717                         (unsigned int)child->pid, domain->name ));
 718
 719                 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
 720                                    MSG_WINBIND_OFFLINE,
 721                                    (uint8 *)child->domain->name,
 722                                    strlen(child->domain->name)+1);
 723         }
 724 }
 725
 726 /* Set our domains as online and forward the online message to our children. */
 727
 728 void winbind_msg_online(struct messaging_context *msg_ctx,
 729                         void *private_data,
 730                         uint32_t msg_type,
 731                         struct server_id server_id,
 732                         DATA_BLOB *data)
 733 {
 734         struct winbindd_child *child;
 735         struct winbindd_domain *domain;
 736
 737         DEBUG(10,("winbind_msg_online: got online message.\n"));
 738
 739         if (!lp_winbind_offline_logon()) {
 740                 DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
 741                 return;
 742         }
 743
 744         /* Set our global state as online. */
 745         set_global_winbindd_state_online();
 746
 747         smb_nscd_flush_user_cache();
 748         smb_nscd_flush_group_cache();
 749
 750         /* Set all our domains as online. */
 751         for (domain = domain_list(); domain; domain = domain->next) {
 752                 if (domain->internal) {
 753                         continue;
 754                 }
 755                 DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
 756
 757                 winbindd_flush_negative_conn_cache(domain);
 758                 set_domain_online_request(domain);
 759
 760                 /* Send an online message to the idmap child when our
 761                    primary domain comes back online */
 762
 763                 if ( domain->primary ) {
 764                         struct winbindd_child *idmap = idmap_child();
 765
 766                         if ( idmap->pid != 0 ) {
 767                                 messaging_send_buf(msg_ctx,
 768                                                    pid_to_procid(idmap->pid),
 769                                                    MSG_WINBIND_ONLINE,
 770                                                    (uint8 *)domain->name,
 771                                                    strlen(domain->name)+1);
 772                         }
 773                 }
 774         }
 775
 776         for (child = children; child != NULL; child = child->next) {
 777                 /* Don't send message to internal childs. */
 778                 if (!child->domain || winbindd_internal_child(child)) {
 779                         continue;
 780                 }
 781
 782                 /* Or internal domains (this should not be possible....) */
 783                 if (child->domain->internal) {
 784                         continue;
 785                 }
 786
 787                 /* Each winbindd child should only process requests for one domain - make sure
 788                    we only set it online / offline for that domain. */
 789
 790                 DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
 791                         (unsigned int)child->pid, child->domain->name ));
 792
 793                 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
 794                                    MSG_WINBIND_ONLINE,
 795                                    (uint8 *)child->domain->name,
 796                                    strlen(child->domain->name)+1);
 797         }
 798 }
 799
 800 static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
 801 {
 802         struct winbindd_domain *domain;
 803         char *buf = NULL;
 804
 805         if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
 806                                    get_global_winbindd_state_offline() ?
 807                                    "Offline":"Online")) == NULL) {
 808                 return NULL;
 809         }
 810
 811         for (domain = domain_list(); domain; domain = domain->next) {
 812                 if ((buf = talloc_asprintf_append_buffer(buf, "%s:%s ",
 813                                                   domain->name,
 814                                                   domain->online ?
 815                                                   "Online":"Offline")) == NULL) {
 816                         return NULL;
 817                 }
 818         }
 819
 820         buf = talloc_asprintf_append_buffer(buf, "\n");
 821
 822         DEBUG(5,("collect_onlinestatus: %s", buf));
 823
 824         return buf;
 825 }
 826
 827 void winbind_msg_onlinestatus(struct messaging_context *msg_ctx,
 828                               void *private_data,
 829                               uint32_t msg_type,
 830                               struct server_id server_id,
 831                               DATA_BLOB *data)
 832 {
 833         TALLOC_CTX *mem_ctx;
 834         const char *message;
 835         struct server_id *sender;
 836
 837         DEBUG(5,("winbind_msg_onlinestatus received.\n"));
 838
 839         if (!data->data) {
 840                 return;
 841         }
 842
 843         sender = (struct server_id *)data->data;
 844
 845         mem_ctx = talloc_init("winbind_msg_onlinestatus");
 846         if (mem_ctx == NULL) {
 847                 return;
 848         }
 849
 850         message = collect_onlinestatus(mem_ctx);
 851         if (message == NULL) {
 852                 talloc_destroy(mem_ctx);
 853                 return;
 854         }
 855
 856         messaging_send_buf(msg_ctx, *sender, MSG_WINBIND_ONLINESTATUS,
 857                            (uint8 *)message, strlen(message) + 1);
 858
 859         talloc_destroy(mem_ctx);
 860 }
 861
 862 void winbind_msg_dump_event_list(struct messaging_context *msg_ctx,
 863                                  void *private_data,
 864                                  uint32_t msg_type,
 865                                  struct server_id server_id,
 866                                  DATA_BLOB *data)
 867 {
 868         struct winbindd_child *child;
 869
 870         DEBUG(10,("winbind_msg_dump_event_list received\n"));
 871
 872         dump_event_list(winbind_event_context());
 873
 874         for (child = children; child != NULL; child = child->next) {
 875
 876                 DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
 877                         (unsigned int)child->pid));
 878
 879                 messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
 880                                    MSG_DUMP_EVENT_LIST,
 881                                    NULL, 0);
 882         }
 883
 884 }
 885
 886 void winbind_msg_dump_domain_list(struct messaging_context *msg_ctx,
 887                                   void *private_data,
 888                                   uint32_t msg_type,
 889                                   struct server_id server_id,
 890                                   DATA_BLOB *data)
 891 {
 892         TALLOC_CTX *mem_ctx;
 893         const char *message = NULL;
 894         struct server_id *sender = NULL;
 895         const char *domain = NULL;
 896         char *s = NULL;
 897         NTSTATUS status;
 898         struct winbindd_domain *dom = NULL;
 899
 900         DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
 901
 902         if (!data || !data->data) {
 903                 return;
 904         }
 905
 906         if (data->length < sizeof(struct server_id)) {
 907                 return;
 908         }
 909
 910         mem_ctx = talloc_init("winbind_msg_dump_domain_list");
 911         if (!mem_ctx) {
 912                 return;
 913         }
 914
 915         sender = (struct server_id *)data->data;
 916         if (data->length > sizeof(struct server_id)) {
 917                 domain = (const char *)data->data+sizeof(struct server_id);
 918         }
 919
 920         if (domain) {
 921
 922                 DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
 923                         domain));
 924
 925                 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain,
 926                                                   find_domain_from_name_noinit(domain));
 927                 if (!message) {
 928                         talloc_destroy(mem_ctx);
 929                         return;
 930                 }
 931
 932                 messaging_send_buf(msg_ctx, *sender,
 933                                    MSG_WINBIND_DUMP_DOMAIN_LIST,
 934                                    (uint8_t *)message, strlen(message) + 1);
 935
 936                 talloc_destroy(mem_ctx);
 937
 938                 return;
 939         }
 940
 941         DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
 942
 943         for (dom = domain_list(); dom; dom=dom->next) {
 944                 message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain, dom);
 945                 if (!message) {
 946                         talloc_destroy(mem_ctx);
 947                         return;
 948                 }
 949
 950                 s = talloc_asprintf_append(s, "%s\n", message);
 951                 if (!s) {
 952                         talloc_destroy(mem_ctx);
 953                         return;
 954                 }
 955         }
 956
 957         status = messaging_send_buf(msg_ctx, *sender,
 958                                     MSG_WINBIND_DUMP_DOMAIN_LIST,
 959                                     (uint8_t *)s, strlen(s) + 1);
 960         if (!NT_STATUS_IS_OK(status)) {
 961                 DEBUG(0,("failed to send message: %s\n",
 962                 nt_errstr(status)));
 963         }
 964
 965         talloc_destroy(mem_ctx);
 966 }
 967
 968 static void account_lockout_policy_handler(struct event_context *ctx,
 969                                            struct timed_event *te,
 970                                            struct timeval now,
 971                                            void *private_data)
 972 {
 973         struct winbindd_child *child =
 974                 (struct winbindd_child *)private_data;
 975         TALLOC_CTX *mem_ctx = NULL;
 976         struct winbindd_methods *methods;
 977         struct samr_DomInfo12 lockout_policy;
 978         NTSTATUS result;
 979
 980         DEBUG(10,("account_lockout_policy_handler called\n"));
 981
 982         TALLOC_FREE(child->lockout_policy_event);
 983
 984         if ( !winbindd_can_contact_domain( child->domain ) ) {
 985                 DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
 986                           "do not have an incoming trust to domain %s\n",
 987                           child->domain->name));
 988
 989                 return;
 990         }
 991
 992         methods = child->domain->methods;
 993
 994         mem_ctx = talloc_init("account_lockout_policy_handler ctx");
 995         if (!mem_ctx) {
 996                 result = NT_STATUS_NO_MEMORY;
 997         } else {
 998                 result = methods->lockout_policy(child->domain, mem_ctx, &lockout_policy);
 999         }
1000         TALLOC_FREE(mem_ctx);
1001
1002         if (!NT_STATUS_IS_OK(result)) {
1003                 DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
1004                          nt_errstr(result)));
1005         }
1006
1007         child->lockout_policy_event = event_add_timed(winbind_event_context(), NULL,
1008                                                       timeval_current_ofs(3600, 0),
1009                                                       account_lockout_policy_handler,
1010                                                       child);
1011 }
1012
1013 static time_t get_machine_password_timeout(void)
1014 {
1015         /* until we have gpo support use lp setting */
1016         return lp_machine_password_timeout();
1017 }
1018
1019 static bool calculate_next_machine_pwd_change(const char *domain,
1020                                               struct timeval *t)
1021 {
1022         time_t pass_last_set_time;
1023         time_t timeout;
1024         time_t next_change;
1025         char *pw;
1026
1027         pw = secrets_fetch_machine_password(domain,
1028                                             &pass_last_set_time,
1029                                             NULL);
1030
1031         if (pw == NULL) {
1032                 DEBUG(0,("cannot fetch own machine password ????"));
1033                 return false;
1034         }
1035
1036         SAFE_FREE(pw);
1037
1038         timeout = get_machine_password_timeout();
1039         if (timeout == 0) {
1040                 DEBUG(10,("machine password never expires\n"));
1041                 return false;
1042         }
1043
1044         if (time(NULL) < (pass_last_set_time + timeout)) {
1045                 next_change = pass_last_set_time + timeout;
1046                 DEBUG(10,("machine password still valid until: %s\n",
1047                         http_timestring(talloc_tos(), next_change)));
1048                 *t = timeval_set(next_change, 0);
1049                 return true;
1050         }
1051
1052         DEBUG(10,("machine password expired, needs immediate change\n"));
1053
1054         *t = timeval_zero();
1055
1056         return true;
1057 }
1058
1059 static void machine_password_change_handler(struct event_context *ctx,
1060                                             struct timed_event *te,
1061                                             struct timeval now,
1062                                             void *private_data)
1063 {
1064         struct winbindd_child *child =
1065                 (struct winbindd_child *)private_data;
1066         struct rpc_pipe_client *netlogon_pipe = NULL;
1067         TALLOC_CTX *frame;
1068         NTSTATUS result;
1069         struct timeval next_change;
1070
1071         DEBUG(10,("machine_password_change_handler called\n"));
1072
1073         TALLOC_FREE(child->machine_password_change_event);
1074
1075         if (!calculate_next_machine_pwd_change(child->domain->name,
1076                                                &next_change)) {
1077                 return;
1078         }
1079
1080         if (!winbindd_can_contact_domain(child->domain)) {
1081                 DEBUG(10,("machine_password_change_handler: Removing myself since I "
1082                           "do not have an incoming trust to domain %s\n",
1083                           child->domain->name));
1084                 return;
1085         }
1086
1087         result = cm_connect_netlogon(child->domain, &netlogon_pipe);
1088         if (!NT_STATUS_IS_OK(result)) {
1089                 DEBUG(10,("machine_password_change_handler: "
1090                         "failed to connect netlogon pipe: %s\n",
1091                          nt_errstr(result)));
1092                 return;
1093         }
1094
1095         frame = talloc_stackframe();
1096
1097         result = trust_pw_find_change_and_store_it(netlogon_pipe,
1098                                                    frame,
1099                                                    child->domain->name);
1100         TALLOC_FREE(frame);
1101
1102         if (!NT_STATUS_IS_OK(result)) {
1103                 DEBUG(10,("machine_password_change_handler: "
1104                         "failed to change machine password: %s\n",
1105                          nt_errstr(result)));
1106         } else {
1107                 DEBUG(10,("machine_password_change_handler: "
1108                         "successfully changed machine password\n"));
1109         }
1110
1111         child->machine_password_change_event = event_add_timed(winbind_event_context(), NULL,
1112                                                               next_change,
1113                                                               machine_password_change_handler,
1114                                                               child);
1115 }
1116
1117 /* Deal with a request to go offline. */
1118
1119 static void child_msg_offline(struct messaging_context *msg,
1120                               void *private_data,
1121                               uint32_t msg_type,
1122                               struct server_id server_id,
1123                               DATA_BLOB *data)
1124 {
1125         struct winbindd_domain *domain;
1126         struct winbindd_domain *primary_domain = NULL;
1127         const char *domainname = (const char *)data->data;
1128
1129         if (data->data == NULL || data->length == 0) {
1130                 return;
1131         }
1132
1133         DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
1134
1135         if (!lp_winbind_offline_logon()) {
1136                 DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
1137                 return;
1138         }
1139
1140         primary_domain = find_our_domain();
1141
1142         /* Mark the requested domain offline. */
1143
1144         for (domain = domain_list(); domain; domain = domain->next) {
1145                 if (domain->internal) {
1146                         continue;
1147                 }
1148                 if (strequal(domain->name, domainname)) {
1149                         DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
1150                         set_domain_offline(domain);
1151                         /* we are in the trusted domain, set the primary domain
1152                          * offline too */
1153                         if (domain != primary_domain) {
1154                                 set_domain_offline(primary_domain);
1155                         }
1156                 }
1157         }
1158 }
1159
1160 /* Deal with a request to go online. */
1161
1162 static void child_msg_online(struct messaging_context *msg,
1163                              void *private_data,
1164                              uint32_t msg_type,
1165                              struct server_id server_id,
1166                              DATA_BLOB *data)
1167 {
1168         struct winbindd_domain *domain;
1169         struct winbindd_domain *primary_domain = NULL;
1170         const char *domainname = (const char *)data->data;
1171
1172         if (data->data == NULL || data->length == 0) {
1173                 return;
1174         }
1175
1176         DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
1177
1178         if (!lp_winbind_offline_logon()) {
1179                 DEBUG(10,("child_msg_online: rejecting online message.\n"));
1180                 return;
1181         }
1182
1183         primary_domain = find_our_domain();
1184
1185         /* Set our global state as online. */
1186         set_global_winbindd_state_online();
1187
1188         /* Try and mark everything online - delete any negative cache entries
1189            to force a reconnect now. */
1190
1191         for (domain = domain_list(); domain; domain = domain->next) {
1192                 if (domain->internal) {
1193                         continue;
1194                 }
1195                 if (strequal(domain->name, domainname)) {
1196                         DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain->name));
1197                         winbindd_flush_negative_conn_cache(domain);
1198                         set_domain_online_request(domain);
1199
1200                         /* we can be in trusted domain, which will contact primary domain
1201                          * we have to bring primary domain online in trusted domain process
1202                          * see, winbindd_dual_pam_auth() --> winbindd_dual_pam_auth_samlogon()
1203                          * --> contact_domain = find_our_domain()
1204                          * */
1205                         if (domain != primary_domain) {
1206                                 winbindd_flush_negative_conn_cache(primary_domain);
1207                                 set_domain_online_request(primary_domain);
1208                         }
1209                 }
1210         }
1211 }
1212
1213 static void child_msg_dump_event_list(struct messaging_context *msg,
1214                                       void *private_data,
1215                                       uint32_t msg_type,
1216                                       struct server_id server_id,
1217                                       DATA_BLOB *data)
1218 {
1219         DEBUG(5,("child_msg_dump_event_list received\n"));
1220
1221         dump_event_list(winbind_event_context());
1222 }
1223
1224 bool winbindd_reinit_after_fork(const char *logfilename)
1225 {
1226         struct winbindd_domain *domain;
1227         struct winbindd_child *cl;
1228
1229         if (!NT_STATUS_IS_OK(reinit_after_fork(winbind_messaging_context(),
1230                                                winbind_event_context(),
1231                                                true))) {
1232                 DEBUG(0,("reinit_after_fork() failed\n"));
1233                 return false;
1234         }
1235
1236         close_conns_after_fork();
1237
1238         if (!override_logfile && logfilename) {
1239                 lp_set_logfile(logfilename);
1240                 reopen_logs();
1241         }
1242
1243         if (!winbindd_setup_sig_term_handler(false))
1244                 return false;
1245         if (!winbindd_setup_sig_hup_handler(override_logfile ? NULL :
1246                                             logfilename))
1247                 return false;
1248
1249         /* Don't handle the same messages as our parent. */
1250         messaging_deregister(winbind_messaging_context(),
1251                              MSG_SMB_CONF_UPDATED, NULL);
1252         messaging_deregister(winbind_messaging_context(),
1253                              MSG_SHUTDOWN, NULL);
1254         messaging_deregister(winbind_messaging_context(),
1255                              MSG_WINBIND_OFFLINE, NULL);
1256         messaging_deregister(winbind_messaging_context(),
1257                              MSG_WINBIND_ONLINE, NULL);
1258         messaging_deregister(winbind_messaging_context(),
1259                              MSG_WINBIND_ONLINESTATUS, NULL);
1260         messaging_deregister(winbind_messaging_context(),
1261                              MSG_DUMP_EVENT_LIST, NULL);
1262         messaging_deregister(winbind_messaging_context(),
1263                              MSG_WINBIND_DUMP_DOMAIN_LIST, NULL);
1264         messaging_deregister(winbind_messaging_context(),
1265                              MSG_DEBUG, NULL);
1266
1267         /* We have destroyed all events in the winbindd_event_context
1268          * in reinit_after_fork(), so clean out all possible pending
1269          * event pointers. */
1270
1271         /* Deal with check_online_events. */
1272
1273         for (domain = domain_list(); domain; domain = domain->next) {
1274                 TALLOC_FREE(domain->check_online_event);
1275         }
1276
1277         /* Ensure we're not handling a credential cache event inherited
1278          * from our parent. */
1279
1280         ccache_remove_all_after_fork();
1281
1282         /* Destroy all possible events in child list. */
1283         for (cl = children; cl != NULL; cl = cl->next) {
1284                 TALLOC_FREE(cl->lockout_policy_event);
1285                 TALLOC_FREE(cl->machine_password_change_event);
1286
1287                 /* Children should never be able to send
1288                  * each other messages, all messages must
1289                  * go through the parent.
1290                  */
1291                 cl->pid = (pid_t)0;
1292         }
1293         /*
1294          * This is a little tricky, children must not
1295          * send an MSG_WINBIND_ONLINE message to idmap_child().
1296          * If we are in a child of our primary domain or
1297          * in the process created by fork_child_dc_connect(),
1298          * and the primary domain cannot go online,
1299          * fork_child_dc_connection() sends MSG_WINBIND_ONLINE
1300          * periodically to idmap_child().
1301          *
1302          * The sequence is, fork_child_dc_connect() ---> getdcs() --->
1303          * get_dc_name_via_netlogon() ---> cm_connect_netlogon()
1304          * ---> init_dc_connection() ---> cm_open_connection --->
1305          * set_domain_online(), sends MSG_WINBIND_ONLINE to
1306          * idmap_child(). Disallow children sending messages
1307          * to each other, all messages must go through the parent.
1308          */
1309         cl = idmap_child();
1310         cl->pid = (pid_t)0;
1311
1312         return true;
1313 }
1314
1315 static bool fork_domain_child(struct winbindd_child *child)
1316 {
1317         int fdpair[2];
1318         struct winbindd_cli_state state;
1319         struct winbindd_request request;
1320         struct winbindd_response response;
1321         struct winbindd_domain *primary_domain = NULL;
1322
1323         if (child->domain) {
1324                 DEBUG(10, ("fork_domain_child called for domain '%s'\n",
1325                            child->domain->name));
1326         } else {
1327                 DEBUG(10, ("fork_domain_child called without domain.\n"));
1328         }
1329
1330         if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
1331                 DEBUG(0, ("Could not open child pipe: %s\n",
1332                           strerror(errno)));
1333                 return False;
1334         }
1335
1336         ZERO_STRUCT(state);
1337         state.pid = sys_getpid();
1338         state.request = &request;
1339         state.response = &response;
1340
1341         child->pid = sys_fork();
1342
1343         if (child->pid == -1) {
1344                 DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
1345                 return False;
1346         }
1347
1348         if (child->pid != 0) {
1349                 /* Parent */
1350                 close(fdpair[0]);
1351                 child->next = child->prev = NULL;
1352                 DLIST_ADD(children, child);
1353                 child->sock = fdpair[1];
1354                 return True;
1355         }
1356
1357         /* Child */
1358
1359         DEBUG(10, ("Child process %d\n", (int)sys_getpid()));
1360
1361         /* Stop zombies in children */
1362         CatchChild();
1363
1364         state.sock = fdpair[0];
1365         close(fdpair[1]);
1366
1367         if (!winbindd_reinit_after_fork(child->logfilename)) {
1368                 _exit(0);
1369         }
1370
1371         /* Handle online/offline messages. */
1372         messaging_register(winbind_messaging_context(), NULL,
1373                            MSG_WINBIND_OFFLINE, child_msg_offline);
1374         messaging_register(winbind_messaging_context(), NULL,
1375                            MSG_WINBIND_ONLINE, child_msg_online);
1376         messaging_register(winbind_messaging_context(), NULL,
1377                            MSG_DUMP_EVENT_LIST, child_msg_dump_event_list);
1378         messaging_register(winbind_messaging_context(), NULL,
1379                            MSG_DEBUG, debug_message);
1380
1381         primary_domain = find_our_domain();
1382
1383         if (primary_domain == NULL) {
1384                 smb_panic("no primary domain found");
1385         }
1386
1387         /* It doesn't matter if we allow cache login,
1388          * try to bring domain online after fork. */
1389         if ( child->domain ) {
1390                 child->domain->startup = True;
1391                 child->domain->startup_time = time(NULL);
1392                 /* we can be in primary domain or in trusted domain
1393                  * If we are in trusted domain, set the primary domain
1394                  * in start-up mode */
1395                 if (!(child->domain->internal)) {
1396                         set_domain_online_request(child->domain);
1397                         if (!(child->domain->primary)) {
1398                                 primary_domain->startup = True;
1399                                 primary_domain->startup_time = time(NULL);
1400                                 set_domain_online_request(primary_domain);
1401                         }
1402                 }
1403         }
1404
1405         /*
1406          * We are in idmap child, make sure that we set the
1407          * check_online_event to bring primary domain online.
1408          */
1409         if (child == idmap_child()) {
1410                 set_domain_online_request(primary_domain);
1411         }
1412
1413         /* We might be in the idmap child...*/
1414         if (child->domain && !(child->domain->internal) &&
1415             lp_winbind_offline_logon()) {
1416
1417                 set_domain_online_request(child->domain);
1418
1419                 if (primary_domain && (primary_domain != child->domain)) {
1420                         /* We need to talk to the primary
1421                          * domain as well as the trusted
1422                          * domain inside a trusted domain
1423                          * child.
1424                          * See the code in :
1425                          * set_dc_type_and_flags_trustinfo()
1426                          * for details.
1427                          */
1428                         set_domain_online_request(primary_domain);
1429                 }
1430
1431                 child->lockout_policy_event = event_add_timed(
1432                         winbind_event_context(), NULL, timeval_zero(),
1433                         account_lockout_policy_handler,
1434                         child);
1435         }
1436
1437         if (child->domain && child->domain->primary &&
1438             !USE_KERBEROS_KEYTAB &&
1439             lp_server_role() == ROLE_DOMAIN_MEMBER) {
1440
1441                 struct timeval next_change;
1442
1443                 if (calculate_next_machine_pwd_change(child->domain->name,
1444                                                        &next_change)) {
1445                         child->machine_password_change_event = event_add_timed(
1446                                 winbind_event_context(), NULL, next_change,
1447                                 machine_password_change_handler,
1448                                 child);
1449                 }
1450         }
1451
1452         while (1) {
1453
1454                 int ret;
1455                 fd_set r_fds;
1456                 fd_set w_fds;
1457                 int maxfd;
1458                 struct timeval t;
1459                 struct timeval *tp;
1460                 struct timeval now;
1461                 TALLOC_CTX *frame = talloc_stackframe();
1462                 struct iovec iov[2];
1463                 int iov_count;
1464                 NTSTATUS status;
1465
1466                 if (run_events(winbind_event_context(), 0, NULL, NULL)) {
1467                         TALLOC_FREE(frame);
1468                         continue;
1469                 }
1470
1471                 GetTimeOfDay(&now);
1472
1473                 if (child->domain && child->domain->startup &&
1474                                 (now.tv_sec > child->domain->startup_time + 30)) {
1475                         /* No longer in "startup" mode. */
1476                         DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
1477                                 child->domain->name ));
1478                         child->domain->startup = False;
1479                 }
1480
1481                 FD_ZERO(&r_fds);
1482                 FD_ZERO(&w_fds);
1483                 FD_SET(state.sock, &r_fds);
1484                 maxfd = state.sock;
1485
1486                 event_add_to_select_args(winbind_event_context(), &now,
1487                                          &r_fds, &w_fds, &t, &maxfd);
1488                 tp = get_timed_events_timeout(winbind_event_context(), &t);
1489                 if (tp) {
1490                         DEBUG(11,("select will use timeout of %u.%u seconds\n",
1491                                 (unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
1492                 }
1493
1494                 ret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, tp);
1495
1496                 if (run_events(winbind_event_context(), ret, &r_fds, &w_fds)) {
1497                         /* We got a signal - continue. */
1498                         TALLOC_FREE(frame);
1499                         continue;
1500                 }
1501
1502                 if (ret == 0) {
1503                         DEBUG(11,("nothing is ready yet, continue\n"));
1504                         TALLOC_FREE(frame);
1505                         continue;
1506                 }
1507
1508                 if (ret == -1 && errno == EINTR) {
1509                         /* We got a signal - continue. */
1510                         TALLOC_FREE(frame);
1511                         continue;
1512                 }
1513
1514                 if (ret == -1 && errno != EINTR) {
1515                         DEBUG(0,("select error occured\n"));
1516                         TALLOC_FREE(frame);
1517                         perror("select");
1518                         _exit(1);
1519                 }
1520
1521                 /* fetch a request from the main daemon */
1522                 status = child_read_request(&state);
1523
1524                 if (!NT_STATUS_IS_OK(status)) {
1525                         /* we lost contact with our parent */
1526                         _exit(0);
1527                 }
1528
1529                 DEBUG(4,("child daemon request %d\n", (int)state.request->cmd));
1530
1531                 ZERO_STRUCTP(state.response);
1532                 state.request->null_term = '\0';
1533                 child_process_request(child, &state);
1534
1535                 DEBUG(4, ("Finished processing child request %d\n",
1536                           (int)state.request->cmd));
1537
1538                 SAFE_FREE(state.request->extra_data.data);
1539
1540                 iov[0].iov_base = (void *)state.response;
1541                 iov[0].iov_len = sizeof(struct winbindd_response);
1542                 iov_count = 1;
1543
1544                 if (state.response->length > sizeof(struct winbindd_response)) {
1545                         iov[1].iov_base =
1546                                 (void *)state.response->extra_data.data;
1547                         iov[1].iov_len = state.response->length-iov[0].iov_len;
1548                         iov_count = 2;
1549                 }
1550
1551                 DEBUG(10, ("Writing %d bytes to parent\n",
1552                            (int)state.response->length));
1553
1554                 if (write_data_iov(state.sock, iov, iov_count) !=
1555                     state.response->length) {
1556                         DEBUG(0, ("Could not write result\n"));
1557                         exit(1);
1558                 }
1559                 TALLOC_FREE(frame);
1560         }
1561 }