winrc/win_svc.c

   1 /*
   2  * winrc/win_svc.c - windows services API implementation for unbound
   3  *
   4  * Copyright (c) 2009, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  26  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
  27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file contains functions to integrate with the windows services API.
  40  * This means it handles the commandline switches to install and remove
  41  * the service (via CreateService and DeleteService), it handles
  42  * the ServiceMain() main service entry point when started as a service,
  43  * and it handles the Handler[_ex]() to process requests to the service
  44  * (such as start and stop and status).
  45  */
  46 #include "config.h"
  47 #include "winrc/win_svc.h"
  48 #include "winrc/w_inst.h"
  49 #include "daemon/daemon.h"
  50 #include "daemon/worker.h"
  51 #include "daemon/remote.h"
  52 #include "util/config_file.h"
  53 #include "util/netevent.h"
  54 #include "util/winsock_event.h"
  55
  56 /** global service status */
  57 static SERVICE_STATUS   service_status;
  58 /** global service status handle */
  59 static SERVICE_STATUS_HANDLE service_status_handle;
  60 /** global service stop event */
  61 static WSAEVENT service_stop_event = NULL;
  62 /** event struct for stop callbacks */
  63 static struct event service_stop_ev;
  64 /** if stop even means shutdown or restart */
  65 static int service_stop_shutdown = 0;
  66 /** config file to open. global communication to service_main() */
  67 static char* service_cfgfile = CONFIGFILE;
  68 /** commandline verbosity. global communication to service_main() */
  69 static int service_cmdline_verbose = 0;
  70 /** the cron callback */
  71 static struct comm_timer* service_cron = NULL;
  72 /** the cron thread */
  73 static ub_thread_t cron_thread = NULL;
  74 /** if cron has already done its quick check */
  75 static int cron_was_quick = 0;
  76
  77 /**
  78  * Report current service status to service control manager
  79  * @param state: current state
  80  * @param exitcode: error code (when stopped)
  81  * @param wait: pending operation estimated time in milliseconds.
  82  */
  83 static void report_status(DWORD state, DWORD exitcode, DWORD wait)
  84 {
  85         static DWORD checkpoint = 1;
  86         service_status.dwCurrentState = state;
  87         service_status.dwWin32ExitCode = exitcode;
  88         service_status.dwWaitHint = wait;
  89         if(state == SERVICE_START_PENDING)
  90                 service_status.dwControlsAccepted = 0;
  91         else    service_status.dwControlsAccepted = SERVICE_ACCEPT_STOP;
  92         if(state == SERVICE_RUNNING || state == SERVICE_STOPPED)
  93                 service_status.dwCheckPoint = 0;
  94         else    service_status.dwCheckPoint = checkpoint++;
  95         SetServiceStatus(service_status_handle, &service_status);
  96 }
  97
  98 /**
  99  * Service control handler. Called by serviceControlManager when a control
 100  * code is sent to the service (with ControlService).
 101  * @param ctrl: control code
 102  */
 103 static void
 104 hdlr(DWORD ctrl)
 105 {
 106         if(ctrl == SERVICE_CONTROL_STOP) {
 107                 report_status(SERVICE_STOP_PENDING, NO_ERROR, 0);
 108                 service_stop_shutdown = 1;
 109                 /* send signal to stop */
 110                 if(!WSASetEvent(service_stop_event))
 111                         log_err("Could not WSASetEvent: %s",
 112                                 wsa_strerror(WSAGetLastError()));
 113                 return;
 114         } else {
 115                 /* ctrl == SERVICE_CONTROL_INTERROGATE or whatever */
 116                 /* update status */
 117                 report_status(service_status.dwCurrentState, NO_ERROR, 0);
 118         }
 119 }
 120
 121 /**
 122  * report event to system event log
 123  * For use during startup and shutdown.
 124  * @param str: the error
 125  */
 126 static void
 127 reportev(const char* str)
 128 {
 129         char b[256];
 130         char e[256];
 131         HANDLE* s;
 132         LPCTSTR msg = b;
 133         /* print quickly to keep GetLastError value */
 134         wsvc_err2str(e, sizeof(e), str, GetLastError());
 135         snprintf(b, sizeof(b), "%s: %s", SERVICE_NAME, e);
 136         s = RegisterEventSource(NULL, SERVICE_NAME);
 137         if(!s) return;
 138         ReportEvent(s, /* event log */
 139                 EVENTLOG_ERROR_TYPE, /* event type */
 140                 0, /* event category */
 141                 MSG_GENERIC_ERR, /* event ID (from gen_msg.mc) */
 142                 NULL, /* user security context */
 143                 1, /* numstrings */
 144                 0, /* binary size */
 145                 &msg, /* strings */
 146                 NULL); /* binary data */
 147         DeregisterEventSource(s);
 148 }
 149
 150 /**
 151  * Obtain registry string (if it exists).
 152  * @param key: key string
 153  * @param name: name of value to fetch.
 154  * @return malloced string with the result or NULL if it did not
 155  * exist on an error (logged) was encountered.
 156  */
 157 static char*
 158 lookup_reg_str(const char* key, const char* name)
 159 {
 160         HKEY hk = NULL;
 161         DWORD type = 0;
 162         BYTE buf[1024];
 163         DWORD len = (DWORD)sizeof(buf);
 164         LONG ret;
 165         char* result = NULL;
 166         ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
 167         if(ret == ERROR_FILE_NOT_FOUND)
 168                 return NULL; /* key does not exist */
 169         else if(ret != ERROR_SUCCESS) {
 170                 reportev("RegOpenKeyEx failed");
 171                 return NULL;
 172         }
 173         ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
 174         if(RegCloseKey(hk))
 175                 reportev("RegCloseKey");
 176         if(ret == ERROR_FILE_NOT_FOUND)
 177                 return NULL; /* name does not exist */
 178         else if(ret != ERROR_SUCCESS) {
 179                 reportev("RegQueryValueEx failed");
 180                 return NULL;
 181         }
 182         if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
 183                 buf[sizeof(buf)-1] = 0;
 184                 buf[sizeof(buf)-2] = 0; /* for multi_sz */
 185                 result = strdup((char*)buf);
 186                 if(!result) reportev("out of memory");
 187         }
 188         return result;
 189 }
 190
 191 /**
 192  * Obtain registry integer (if it exists).
 193  * @param key: key string
 194  * @param name: name of value to fetch.
 195  * @return integer value (if it exists), or 0 on error.
 196  */
 197 static int
 198 lookup_reg_int(const char* key, const char* name)
 199 {
 200         HKEY hk = NULL;
 201         DWORD type = 0;
 202         BYTE buf[1024];
 203         DWORD len = (DWORD)sizeof(buf);
 204         LONG ret;
 205         int result = 0;
 206         ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
 207         if(ret == ERROR_FILE_NOT_FOUND)
 208                 return 0; /* key does not exist */
 209         else if(ret != ERROR_SUCCESS) {
 210                 reportev("RegOpenKeyEx failed");
 211                 return 0;
 212         }
 213         ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
 214         if(RegCloseKey(hk))
 215                 reportev("RegCloseKey");
 216         if(ret == ERROR_FILE_NOT_FOUND)
 217                 return 0; /* name does not exist */
 218         else if(ret != ERROR_SUCCESS) {
 219                 reportev("RegQueryValueEx failed");
 220                 return 0;
 221         }
 222         if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
 223                 buf[sizeof(buf)-1] = 0;
 224                 buf[sizeof(buf)-2] = 0; /* for multi_sz */
 225                 result = atoi((char*)buf);
 226         } else if(type == REG_DWORD) {
 227                 DWORD r;
 228                 memmove(&r, buf, sizeof(r));
 229                 result = r;
 230         }
 231         return result;
 232 }
 233
 234 /** wait for unbound-anchor process to finish */
 235 static void
 236 waitforubanchor(PROCESS_INFORMATION* pinfo)
 237 {
 238         /* we have 5 seconds scheduled for it, usually it will be very fast,
 239          * with only a UDP message or two (100 msec or so), but the https
 240          * connections could take some time */
 241         DWORD count = 7900;
 242         DWORD ret = WAIT_TIMEOUT;
 243         /* decrease timer every 1/10 second, we are still starting up */
 244         while(ret == WAIT_TIMEOUT) {
 245                 ret = WaitForSingleObject(pinfo->hProcess, 100);
 246                 if(count > 4000) count -= 100;
 247                 else count--; /* go slow, it is taking long */
 248                 if(count > 3000)
 249                         report_status(SERVICE_START_PENDING, NO_ERROR, count);
 250         }
 251         verbose(VERB_ALGO, "unbound-anchor done");
 252         if(ret != WAIT_OBJECT_0) {
 253                 return; /* did not end successfully */
 254         }
 255         if(!GetExitCodeProcess(pinfo->hProcess, &ret)) {
 256                 log_err("GetExitCodeProcess failed");
 257                 return;
 258         }
 259         verbose(VERB_ALGO, "unbound-anchor exit code is %d", (int)ret);
 260         if(ret != 0) {
 261                 log_info("The root trust anchor has been updated.");
 262         }
 263 }
 264
 265
 266 /**
 267  * Perform root anchor update if so configured, by calling that process
 268  */
 269 static void
 270 call_root_update(void)
 271 {
 272         char* rootanchor;
 273         rootanchor = lookup_reg_str("Software\\Unbound", "RootAnchor");
 274         if(rootanchor && strlen(rootanchor)>0) {
 275                 STARTUPINFO sinfo;
 276                 PROCESS_INFORMATION pinfo;
 277                 memset(&pinfo, 0, sizeof(pinfo));
 278                 memset(&sinfo, 0, sizeof(sinfo));
 279                 sinfo.cb = sizeof(sinfo);
 280                 verbose(VERB_ALGO, "rootanchor: %s", rootanchor);
 281                 report_status(SERVICE_START_PENDING, NO_ERROR, 8000);
 282                 if(!CreateProcess(NULL, rootanchor, NULL, NULL, 0,
 283                         CREATE_NO_WINDOW, NULL, NULL, &sinfo, &pinfo))
 284                         log_err("CreateProcess error for unbound-anchor.exe");
 285                 else {
 286                         waitforubanchor(&pinfo);
 287                         CloseHandle(pinfo.hProcess);
 288                         CloseHandle(pinfo.hThread);
 289                 }
 290         }
 291         free(rootanchor);
 292 }
 293
 294 /**
 295  * Init service. Keeps calling status pending to tell service control
 296  * manager that this process is not hanging.
 297  * @param r: restart, true on restart
 298  * @param d: daemon returned here.
 299  * @param c: config file returned here.
 300  * @return false if failed.
 301  */
 302 static int
 303 service_init(int r, struct daemon** d, struct config_file** c)
 304 {
 305         struct config_file* cfg = NULL;
 306         struct daemon* daemon = NULL;
 307
 308         if(!service_cfgfile) {
 309                 char* newf = lookup_reg_str("Software\\Unbound", "ConfigFile");
 310                 if(newf) service_cfgfile = newf;
 311                 else    service_cfgfile = strdup(CONFIGFILE);
 312                 if(!service_cfgfile) fatal_exit("out of memory");
 313         }
 314
 315         /* create daemon */
 316         if(r)   daemon = *d;
 317         else    daemon = daemon_init();
 318         if(!daemon) return 0;
 319         if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2800);
 320
 321         /* read config */
 322         cfg = config_create();
 323         if(!cfg) return 0;
 324         if(!config_read(cfg, service_cfgfile, daemon->chroot)) {
 325                 if(errno != ENOENT) {
 326                         log_err("error in config file");
 327                         return 0;
 328                 }
 329                 log_warn("could not open config file, using defaults");
 330         }
 331         if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2600);
 332
 333         verbose(VERB_QUERY, "winservice - apply settings");
 334         /* apply settings and init */
 335         verbosity = cfg->verbosity + service_cmdline_verbose;
 336         if(cfg->directory && cfg->directory[0]) {
 337                 if(chdir(cfg->directory)) {
 338                         log_err("could not chdir to %s: %s",
 339                                 cfg->directory, strerror(errno));
 340                         if(errno != ENOENT)
 341                                 return 0;
 342                         log_warn("could not change directory - continuing");
 343                 } else
 344                         verbose(VERB_QUERY, "chdir to %s", cfg->directory);
 345         }
 346         log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
 347         if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2400);
 348         verbose(VERB_QUERY, "winservice - apply cfg");
 349         daemon_apply_cfg(daemon, cfg);
 350
 351         if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2300);
 352         if(!(daemon->rc = daemon_remote_create(cfg))) {
 353                 log_err("could not set up remote-control");
 354                 daemon_delete(daemon);
 355                 config_delete(cfg);
 356                 return 0;
 357         }
 358
 359         /* open ports */
 360         /* keep reporting that we are busy starting */
 361         if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2200);
 362         verbose(VERB_QUERY, "winservice - open ports");
 363         if(!daemon_open_shared_ports(daemon)) return 0;
 364         verbose(VERB_QUERY, "winservice - ports opened");
 365         if(!r) report_status(SERVICE_START_PENDING, NO_ERROR, 2000);
 366
 367         *d = daemon;
 368         *c = cfg;
 369         return 1;
 370 }
 371
 372 /**
 373  * Deinit the service
 374  */
 375 static void
 376 service_deinit(struct daemon* daemon, struct config_file* cfg)
 377 {
 378         daemon_cleanup(daemon);
 379         config_delete(cfg);
 380         daemon_delete(daemon);
 381 }
 382
 383 /**
 384  * The main function for the service.
 385  * Called by the services API when starting unbound on windows in background.
 386  * Arguments could have been present in the string 'path'.
 387  * @param argc: nr args
 388  * @param argv: arg text.
 389  */
 390 static void
 391 service_main(DWORD ATTR_UNUSED(argc), LPTSTR* ATTR_UNUSED(argv))
 392 {
 393         struct config_file* cfg = NULL;
 394         struct daemon* daemon = NULL;
 395
 396         service_status_handle = RegisterServiceCtrlHandler(SERVICE_NAME,
 397                 (LPHANDLER_FUNCTION)hdlr);
 398         if(!service_status_handle) {
 399                 reportev("Could not RegisterServiceCtrlHandler");
 400                 return;
 401         }
 402
 403         service_status.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
 404         service_status.dwServiceSpecificExitCode = 0;
 405
 406         /* see if we have root anchor update enabled */
 407         call_root_update();
 408
 409         /* we are now starting up */
 410         report_status(SERVICE_START_PENDING, NO_ERROR, 3000);
 411         if(!service_init(0, &daemon, &cfg)) {
 412                 reportev("Could not service_init");
 413                 report_status(SERVICE_STOPPED, NO_ERROR, 0);
 414                 return;
 415         }
 416
 417         /* event that gets signalled when we want to quit; it
 418          * should get registered in the worker-0 waiting loop. */
 419         service_stop_event = WSACreateEvent();
 420         if(service_stop_event == WSA_INVALID_EVENT) {
 421                 log_err("WSACreateEvent: %s", wsa_strerror(WSAGetLastError()));
 422                 reportev("Could not WSACreateEvent");
 423                 report_status(SERVICE_STOPPED, NO_ERROR, 0);
 424                 return;
 425         }
 426         if(!WSAResetEvent(service_stop_event)) {
 427                 log_err("WSAResetEvent: %s", wsa_strerror(WSAGetLastError()));
 428         }
 429
 430         /* SetServiceStatus SERVICE_RUNNING;*/
 431         report_status(SERVICE_RUNNING, NO_ERROR, 0);
 432         verbose(VERB_QUERY, "winservice - init complete");
 433
 434         /* daemon performs work */
 435         while(!service_stop_shutdown) {
 436                 daemon_fork(daemon);
 437                 if(!service_stop_shutdown) {
 438                         daemon_cleanup(daemon);
 439                         config_delete(cfg); cfg=NULL;
 440                         if(!service_init(1, &daemon, &cfg)) {
 441                                 reportev("Could not service_init");
 442                                 report_status(SERVICE_STOPPED, NO_ERROR, 0);
 443                                 return;
 444                         }
 445                 }
 446         }
 447
 448         /* exit */
 449         verbose(VERB_ALGO, "winservice - cleanup.");
 450         report_status(SERVICE_STOP_PENDING, NO_ERROR, 0);
 451         service_deinit(daemon, cfg);
 452         free(service_cfgfile);
 453         if(service_stop_event) (void)WSACloseEvent(service_stop_event);
 454         verbose(VERB_QUERY, "winservice - full stop");
 455         report_status(SERVICE_STOPPED, NO_ERROR, 0);
 456 }
 457
 458 /** start the service */
 459 static void
 460 service_start(const char* cfgfile, int v, int c)
 461 {
 462         SERVICE_TABLE_ENTRY myservices[2] = {
 463                 {SERVICE_NAME, (LPSERVICE_MAIN_FUNCTION)service_main},
 464                 {NULL, NULL} };
 465         verbosity=v;
 466         if(verbosity >= VERB_QUERY) {
 467                 /* log to file about start sequence */
 468                 fclose(fopen("C:\\unbound.log", "w"));
 469                 log_init("C:\\unbound.log", 0, 0);
 470                 verbose(VERB_QUERY, "open logfile");
 471         } else log_init(0, 1, 0); /* otherwise, use Application log */
 472         if(c) {
 473                 service_cfgfile = strdup(cfgfile);
 474                 if(!service_cfgfile) fatal_exit("out of memory");
 475         } else  service_cfgfile = NULL;
 476         service_cmdline_verbose = v;
 477         /* this call returns when service has stopped. */
 478         if(!StartServiceCtrlDispatcher(myservices)) {
 479                 reportev("Could not StartServiceCtrlDispatcher");
 480         }
 481 }
 482
 483 void
 484 wsvc_command_option(const char* wopt, const char* cfgfile, int v, int c)
 485 {
 486         if(strcmp(wopt, "install") == 0)
 487                 wsvc_install(stdout, NULL);
 488         else if(strcmp(wopt, "remove") == 0)
 489                 wsvc_remove(stdout);
 490         else if(strcmp(wopt, "service") == 0)
 491                 service_start(cfgfile, v, c);
 492         else if(strcmp(wopt, "start") == 0)
 493                 wsvc_rc_start(stdout);
 494         else if(strcmp(wopt, "stop") == 0)
 495                 wsvc_rc_stop(stdout);
 496         else fatal_exit("unknown option: %s", wopt);
 497         exit(0);
 498 }
 499
 500 void
 501 worker_win_stop_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev), void* arg)
 502 {
 503         struct worker* worker = (struct worker*)arg;
 504         verbose(VERB_QUERY, "caught stop signal (wsaevent)");
 505         worker->need_to_exit = 1;
 506         comm_base_exit(worker->base);
 507 }
 508
 509 /** wait for cron process to finish */
 510 static void
 511 waitforit(PROCESS_INFORMATION* pinfo)
 512 {
 513         DWORD ret = WaitForSingleObject(pinfo->hProcess, INFINITE);
 514         verbose(VERB_ALGO, "cronaction done");
 515         if(ret != WAIT_OBJECT_0) {
 516                 return; /* did not end successfully */
 517         }
 518         if(!GetExitCodeProcess(pinfo->hProcess, &ret)) {
 519                 log_err("GetExitCodeProcess failed");
 520                 return;
 521         }
 522         verbose(VERB_ALGO, "exit code is %d", (int)ret);
 523         if(ret != 1) {
 524                 if(!WSASetEvent(service_stop_event))
 525                         log_err("Could not WSASetEvent: %s",
 526                         wsa_strerror(WSAGetLastError()));
 527         }
 528 }
 529
 530 /** Do the cron action and wait for result exit value */
 531 static void*
 532 win_do_cron(void* ATTR_UNUSED(arg))
 533 {
 534         int mynum=65;
 535         char* cronaction;
 536         log_thread_set(&mynum);
 537         cronaction = lookup_reg_str("Software\\Unbound", "CronAction");
 538         if(cronaction && strlen(cronaction)>0) {
 539                 STARTUPINFO sinfo;
 540                 PROCESS_INFORMATION pinfo;
 541                 memset(&pinfo, 0, sizeof(pinfo));
 542                 memset(&sinfo, 0, sizeof(sinfo));
 543                 sinfo.cb = sizeof(sinfo);
 544                 verbose(VERB_ALGO, "cronaction: %s", cronaction);
 545                 if(!CreateProcess(NULL, cronaction, NULL, NULL, 0,
 546                         CREATE_NO_WINDOW, NULL, NULL, &sinfo, &pinfo))
 547                         log_err("CreateProcess error");
 548                 else {
 549                         waitforit(&pinfo);
 550                         CloseHandle(pinfo.hProcess);
 551                         CloseHandle(pinfo.hThread);
 552                 }
 553         }
 554         free(cronaction);
 555         /* stop self */
 556         CloseHandle(cron_thread);
 557         cron_thread = NULL;
 558         return NULL;
 559 }
 560
 561 /** Set the timer for cron for the next wake up */
 562 static void
 563 set_cron_timer()
 564 {
 565         struct timeval tv;
 566         int crontime;
 567         if(cron_was_quick == 0) {
 568                 cron_was_quick = 1;
 569                 crontime = 3600; /* first update some time after boot */
 570         } else {
 571                 crontime = lookup_reg_int("Software\\Unbound", "CronTime");
 572                 if(crontime == 0) crontime = 60*60*24; /* 24 hours */
 573         }
 574         memset(&tv, 0, sizeof(tv));
 575         tv.tv_sec = (time_t)crontime;
 576         comm_timer_set(service_cron, &tv);
 577 }
 578
 579 void
 580 wsvc_cron_cb(void* arg)
 581 {
 582         struct worker* worker = (struct worker*)arg;
 583         /* perform cronned operation */
 584         verbose(VERB_ALGO, "cron timer callback");
 585         if(cron_thread == NULL) {
 586                 /* create new thread to do it */
 587                 ub_thread_create(&cron_thread, win_do_cron, worker);
 588         }
 589         /* reschedule */
 590         set_cron_timer();
 591 }
 592
 593 void wsvc_setup_worker(struct worker* worker)
 594 {
 595         /* if not started with -w service, do nothing */
 596         if(!service_stop_event)
 597                 return;
 598         if(!winsock_register_wsaevent(comm_base_internal(worker->base),
 599                 &service_stop_ev, service_stop_event,
 600                 &worker_win_stop_cb, worker)) {
 601                 fatal_exit("could not register wsaevent");
 602                 return;
 603         }
 604         if(!service_cron) {
 605                 service_cron = comm_timer_create(worker->base,
 606                         wsvc_cron_cb, worker);
 607                 if(!service_cron)
 608                         fatal_exit("could not create cron timer");
 609                 set_cron_timer();
 610         }
 611 }
 612
 613 void wsvc_desetup_worker(struct worker* ATTR_UNUSED(worker))
 614 {
 615         comm_timer_delete(service_cron);
 616         service_cron = NULL;
 617 }