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