contrib/unbound/daemon/daemon.c

   1 /*
   2  * daemon/daemon.c - collection of workers that handles requests.
   3  *
   4  * Copyright (c) 2007, 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
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * The daemon consists of global settings and a number of workers.
  40  */
  41
  42 #include "config.h"
  43 #ifdef HAVE_OPENSSL_ERR_H
  44 #include <openssl/err.h>
  45 #endif
  46
  47 #ifdef HAVE_OPENSSL_RAND_H
  48 #include <openssl/rand.h>
  49 #endif
  50
  51 #ifdef HAVE_OPENSSL_CONF_H
  52 #include <openssl/conf.h>
  53 #endif
  54
  55 #ifdef HAVE_OPENSSL_ENGINE_H
  56 #include <openssl/engine.h>
  57 #endif
  58
  59 #ifdef HAVE_TIME_H
  60 #include <time.h>
  61 #endif
  62 #include <sys/time.h>
  63
  64 #ifdef HAVE_NSS
  65 /* nss3 */
  66 #include "nss.h"
  67 #endif
  68
  69 #include "daemon/daemon.h"
  70 #include "daemon/worker.h"
  71 #include "daemon/remote.h"
  72 #include "daemon/acl_list.h"
  73 #include "util/log.h"
  74 #include "util/config_file.h"
  75 #include "util/data/msgreply.h"
  76 #include "util/storage/lookup3.h"
  77 #include "util/storage/slabhash.h"
  78 #include "services/listen_dnsport.h"
  79 #include "services/cache/rrset.h"
  80 #include "services/cache/infra.h"
  81 #include "services/localzone.h"
  82 #include "services/modstack.h"
  83 #include "util/module.h"
  84 #include "util/random.h"
  85 #include "util/tube.h"
  86 #include "util/net_help.h"
  87 #include "sldns/keyraw.h"
  88 #include <signal.h>
  89
  90 /** How many quit requests happened. */
  91 static int sig_record_quit = 0;
  92 /** How many reload requests happened. */
  93 static int sig_record_reload = 0;
  94
  95 #if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS
  96 /** cleaner ssl memory freeup */
  97 static void* comp_meth = NULL;
  98 #endif
  99 #ifdef LEX_HAS_YYLEX_DESTROY
 100 /** remove buffers for parsing and init */
 101 int ub_c_lex_destroy(void);
 102 #endif
 103
 104 /** used when no other sighandling happens, so we don't die
 105   * when multiple signals in quick succession are sent to us.
 106   * @param sig: signal number.
 107   * @return signal handler return type (void or int).
 108   */
 109 static RETSIGTYPE record_sigh(int sig)
 110 {
 111 #ifdef LIBEVENT_SIGNAL_PROBLEM
 112         /* cannot log, verbose here because locks may be held */
 113         /* quit on signal, no cleanup and statistics,
 114            because installed libevent version is not threadsafe */
 115         exit(0);
 116 #endif
 117         switch(sig)
 118         {
 119                 case SIGTERM:
 120 #ifdef SIGQUIT
 121                 case SIGQUIT:
 122 #endif
 123 #ifdef SIGBREAK
 124                 case SIGBREAK:
 125 #endif
 126                 case SIGINT:
 127                         sig_record_quit++;
 128                         break;
 129 #ifdef SIGHUP
 130                 case SIGHUP:
 131                         sig_record_reload++;
 132                         break;
 133 #endif
 134 #ifdef SIGPIPE
 135                 case SIGPIPE:
 136                         break;
 137 #endif
 138                 default:
 139                         /* ignoring signal */
 140                         break;
 141         }
 142 }
 143
 144 /**
 145  * Signal handling during the time when netevent is disabled.
 146  * Stores signals to replay later.
 147  */
 148 static void
 149 signal_handling_record(void)
 150 {
 151         if( signal(SIGTERM, record_sigh) == SIG_ERR ||
 152 #ifdef SIGQUIT
 153                 signal(SIGQUIT, record_sigh) == SIG_ERR ||
 154 #endif
 155 #ifdef SIGBREAK
 156                 signal(SIGBREAK, record_sigh) == SIG_ERR ||
 157 #endif
 158 #ifdef SIGHUP
 159                 signal(SIGHUP, record_sigh) == SIG_ERR ||
 160 #endif
 161 #ifdef SIGPIPE
 162                 signal(SIGPIPE, SIG_IGN) == SIG_ERR ||
 163 #endif
 164                 signal(SIGINT, record_sigh) == SIG_ERR
 165                 )
 166                 log_err("install sighandler: %s", strerror(errno));
 167 }
 168
 169 /**
 170  * Replay old signals.
 171  * @param wrk: worker that handles signals.
 172  */
 173 static void
 174 signal_handling_playback(struct worker* wrk)
 175 {
 176 #ifdef SIGHUP
 177         if(sig_record_reload)
 178                 worker_sighandler(SIGHUP, wrk);
 179 #endif
 180         if(sig_record_quit)
 181                 worker_sighandler(SIGTERM, wrk);
 182         sig_record_quit = 0;
 183         sig_record_reload = 0;
 184 }
 185
 186 struct daemon*
 187 daemon_init(void)
 188 {
 189         struct daemon* daemon = (struct daemon*)calloc(1,
 190                 sizeof(struct daemon));
 191 #ifdef USE_WINSOCK
 192         int r;
 193         WSADATA wsa_data;
 194 #endif
 195         if(!daemon)
 196                 return NULL;
 197 #ifdef USE_WINSOCK
 198         r = WSAStartup(MAKEWORD(2,2), &wsa_data);
 199         if(r != 0) {
 200                 fatal_exit("could not init winsock. WSAStartup: %s",
 201                         wsa_strerror(r));
 202         }
 203 #endif /* USE_WINSOCK */
 204         signal_handling_record();
 205         checklock_start();
 206 #ifdef HAVE_SSL
 207 #  ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS
 208         ERR_load_crypto_strings();
 209 #  endif
 210         ERR_load_SSL_strings();
 211 #  ifdef USE_GOST
 212         (void)sldns_key_EVP_load_gost_id();
 213 #  endif
 214 #  if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_CRYPTO)
 215         OpenSSL_add_all_algorithms();
 216 #  else
 217         OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS
 218                 | OPENSSL_INIT_ADD_ALL_DIGESTS
 219                 | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 220 #  endif
 221 #  if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS
 222         /* grab the COMP method ptr because openssl leaks it */
 223         comp_meth = (void*)SSL_COMP_get_compression_methods();
 224 #  endif
 225 #  if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL)
 226         (void)SSL_library_init();
 227 #  else
 228         (void)OPENSSL_init_ssl(0, NULL);
 229 #  endif
 230 #  if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED)
 231         if(!ub_openssl_lock_init())
 232                 fatal_exit("could not init openssl locks");
 233 #  endif
 234 #elif defined(HAVE_NSS)
 235         if(NSS_NoDB_Init(NULL) != SECSuccess)
 236                 fatal_exit("could not init NSS");
 237 #endif /* HAVE_SSL or HAVE_NSS */
 238 #ifdef HAVE_TZSET
 239         /* init timezone info while we are not chrooted yet */
 240         tzset();
 241 #endif
 242         /* open /dev/random if needed */
 243         ub_systemseed((unsigned)time(NULL)^(unsigned)getpid()^0xe67);
 244         daemon->need_to_exit = 0;
 245         modstack_init(&daemon->mods);
 246         if(!(daemon->env = (struct module_env*)calloc(1,
 247                 sizeof(*daemon->env)))) {
 248                 free(daemon);
 249                 return NULL;
 250         }
 251         alloc_init(&daemon->superalloc, NULL, 0);
 252         daemon->acl = acl_list_create();
 253         if(!daemon->acl) {
 254                 free(daemon->env);
 255                 free(daemon);
 256                 return NULL;
 257         }
 258         if(gettimeofday(&daemon->time_boot, NULL) < 0)
 259                 log_err("gettimeofday: %s", strerror(errno));
 260         daemon->time_last_stat = daemon->time_boot;
 261         return daemon;
 262 }
 263
 264 int
 265 daemon_open_shared_ports(struct daemon* daemon)
 266 {
 267         log_assert(daemon);
 268         if(daemon->cfg->port != daemon->listening_port) {
 269                 size_t i;
 270                 struct listen_port* p0;
 271                 daemon->reuseport = 0;
 272                 /* free and close old ports */
 273                 if(daemon->ports != NULL) {
 274                         for(i=0; i<daemon->num_ports; i++)
 275                                 listening_ports_free(daemon->ports[i]);
 276                         free(daemon->ports);
 277                         daemon->ports = NULL;
 278                 }
 279                 /* see if we want to reuseport */
 280 #ifdef SO_REUSEPORT
 281                 if(daemon->cfg->so_reuseport && daemon->cfg->num_threads > 0)
 282                         daemon->reuseport = 1;
 283 #endif
 284                 /* try to use reuseport */
 285                 p0 = listening_ports_open(daemon->cfg, &daemon->reuseport);
 286                 if(!p0) {
 287                         listening_ports_free(p0);
 288                         return 0;
 289                 }
 290                 if(daemon->reuseport) {
 291                         /* reuseport was successful, allocate for it */
 292                         daemon->num_ports = (size_t)daemon->cfg->num_threads;
 293                 } else {
 294                         /* do the normal, singleportslist thing,
 295                          * reuseport not enabled or did not work */
 296                         daemon->num_ports = 1;
 297                 }
 298                 if(!(daemon->ports = (struct listen_port**)calloc(
 299                         daemon->num_ports, sizeof(*daemon->ports)))) {
 300                         listening_ports_free(p0);
 301                         return 0;
 302                 }
 303                 daemon->ports[0] = p0;
 304                 if(daemon->reuseport) {
 305                         /* continue to use reuseport */
 306                         for(i=1; i<daemon->num_ports; i++) {
 307                                 if(!(daemon->ports[i]=
 308                                         listening_ports_open(daemon->cfg,
 309                                                 &daemon->reuseport))
 310                                         || !daemon->reuseport ) {
 311                                         for(i=0; i<daemon->num_ports; i++)
 312                                                 listening_ports_free(daemon->ports[i]);
 313                                         free(daemon->ports);
 314                                         daemon->ports = NULL;
 315                                         return 0;
 316                                 }
 317                         }
 318                 }
 319                 daemon->listening_port = daemon->cfg->port;
 320         }
 321         if(!daemon->cfg->remote_control_enable && daemon->rc_port) {
 322                 listening_ports_free(daemon->rc_ports);
 323                 daemon->rc_ports = NULL;
 324                 daemon->rc_port = 0;
 325         }
 326         if(daemon->cfg->remote_control_enable &&
 327                 daemon->cfg->control_port != daemon->rc_port) {
 328                 listening_ports_free(daemon->rc_ports);
 329                 if(!(daemon->rc_ports=daemon_remote_open_ports(daemon->cfg)))
 330                         return 0;
 331                 daemon->rc_port = daemon->cfg->control_port;
 332         }
 333         return 1;
 334 }
 335
 336 /**
 337  * Setup modules. setup module stack.
 338  * @param daemon: the daemon
 339  */
 340 static void daemon_setup_modules(struct daemon* daemon)
 341 {
 342         daemon->env->cfg = daemon->cfg;
 343         daemon->env->alloc = &daemon->superalloc;
 344         daemon->env->worker = NULL;
 345         daemon->env->need_to_validate = 0; /* set by module init below */
 346         if(!modstack_setup(&daemon->mods, daemon->cfg->module_conf,
 347                 daemon->env)) {
 348                 fatal_exit("failed to setup modules");
 349         }
 350 }
 351
 352 /**
 353  * Obtain allowed port numbers, concatenate the list, and shuffle them
 354  * (ready to be handed out to threads).
 355  * @param daemon: the daemon. Uses rand and cfg.
 356  * @param shufport: the portlist output.
 357  * @return number of ports available.
 358  */
 359 static int daemon_get_shufport(struct daemon* daemon, int* shufport)
 360 {
 361         int i, n, k, temp;
 362         int avail = 0;
 363         for(i=0; i<65536; i++) {
 364                 if(daemon->cfg->outgoing_avail_ports[i]) {
 365                         shufport[avail++] = daemon->cfg->
 366                                 outgoing_avail_ports[i];
 367                 }
 368         }
 369         if(avail == 0)
 370                 fatal_exit("no ports are permitted for UDP, add "
 371                         "with outgoing-port-permit");
 372         /* Knuth shuffle */
 373         n = avail;
 374         while(--n > 0) {
 375                 k = ub_random_max(daemon->rand, n+1); /* 0<= k<= n */
 376                 temp = shufport[k];
 377                 shufport[k] = shufport[n];
 378                 shufport[n] = temp;
 379         }
 380         return avail;
 381 }
 382
 383 /**
 384  * Allocate empty worker structures. With backptr and thread-number,
 385  * from 0..numthread initialised. Used as user arguments to new threads.
 386  * Creates the daemon random generator if it does not exist yet.
 387  * The random generator stays existing between reloads with a unique state.
 388  * @param daemon: the daemon with (new) config settings.
 389  */
 390 static void
 391 daemon_create_workers(struct daemon* daemon)
 392 {
 393         int i, numport;
 394         int* shufport;
 395         log_assert(daemon && daemon->cfg);
 396         if(!daemon->rand) {
 397                 unsigned int seed = (unsigned int)time(NULL) ^
 398                         (unsigned int)getpid() ^ 0x438;
 399                 daemon->rand = ub_initstate(seed, NULL);
 400                 if(!daemon->rand)
 401                         fatal_exit("could not init random generator");
 402         }
 403         hash_set_raninit((uint32_t)ub_random(daemon->rand));
 404         shufport = (int*)calloc(65536, sizeof(int));
 405         if(!shufport)
 406                 fatal_exit("out of memory during daemon init");
 407         numport = daemon_get_shufport(daemon, shufport);
 408         verbose(VERB_ALGO, "total of %d outgoing ports available", numport);
 409
 410         daemon->num = (daemon->cfg->num_threads?daemon->cfg->num_threads:1);
 411         if(daemon->reuseport && (int)daemon->num < (int)daemon->num_ports) {
 412                 log_warn("cannot reduce num-threads to %d because so-reuseport "
 413                         "so continuing with %d threads.", (int)daemon->num,
 414                         (int)daemon->num_ports);
 415                 daemon->num = (int)daemon->num_ports;
 416         }
 417         daemon->workers = (struct worker**)calloc((size_t)daemon->num,
 418                 sizeof(struct worker*));
 419         if(!daemon->workers)
 420                 fatal_exit("out of memory during daemon init");
 421         if(daemon->cfg->dnstap) {
 422 #ifdef USE_DNSTAP
 423                 daemon->dtenv = dt_create(daemon->cfg->dnstap_socket_path,
 424                         (unsigned int)daemon->num);
 425                 if (!daemon->dtenv)
 426                         fatal_exit("dt_create failed");
 427                 dt_apply_cfg(daemon->dtenv, daemon->cfg);
 428 #else
 429                 fatal_exit("dnstap enabled in config but not built with dnstap support");
 430 #endif
 431         }
 432         for(i=0; i<daemon->num; i++) {
 433                 if(!(daemon->workers[i] = worker_create(daemon, i,
 434                         shufport+numport*i/daemon->num,
 435                         numport*(i+1)/daemon->num - numport*i/daemon->num)))
 436                         /* the above is not ports/numthr, due to rounding */
 437                         fatal_exit("could not create worker");
 438         }
 439         free(shufport);
 440 }
 441
 442 #ifdef THREADS_DISABLED
 443 /**
 444  * Close all pipes except for the numbered thread.
 445  * @param daemon: daemon to close pipes in.
 446  * @param thr: thread number 0..num-1 of thread to skip.
 447  */
 448 static void close_other_pipes(struct daemon* daemon, int thr)
 449 {
 450         int i;
 451         for(i=0; i<daemon->num; i++)
 452                 if(i!=thr) {
 453                         if(i==0) {
 454                                 /* only close read part, need to write stats */
 455                                 tube_close_read(daemon->workers[i]->cmd);
 456                         } else {
 457                                 /* complete close channel to others */
 458                                 tube_delete(daemon->workers[i]->cmd);
 459                                 daemon->workers[i]->cmd = NULL;
 460                         }
 461                 }
 462 }
 463 #endif /* THREADS_DISABLED */
 464
 465 /**
 466  * Function to start one thread.
 467  * @param arg: user argument.
 468  * @return: void* user return value could be used for thread_join results.
 469  */
 470 static void*
 471 thread_start(void* arg)
 472 {
 473         struct worker* worker = (struct worker*)arg;
 474         int port_num = 0;
 475         log_thread_set(&worker->thread_num);
 476         ub_thread_blocksigs();
 477 #ifdef THREADS_DISABLED
 478         /* close pipe ends used by main */
 479         tube_close_write(worker->cmd);
 480         close_other_pipes(worker->daemon, worker->thread_num);
 481 #endif
 482 #ifdef SO_REUSEPORT
 483         if(worker->daemon->cfg->so_reuseport)
 484                 port_num = worker->thread_num % worker->daemon->num_ports;
 485         else
 486                 port_num = 0;
 487 #endif
 488         if(!worker_init(worker, worker->daemon->cfg,
 489                         worker->daemon->ports[port_num], 0))
 490                 fatal_exit("Could not initialize thread");
 491
 492         worker_work(worker);
 493         return NULL;
 494 }
 495
 496 /**
 497  * Fork and init the other threads. Main thread returns for special handling.
 498  * @param daemon: the daemon with other threads to fork.
 499  */
 500 static void
 501 daemon_start_others(struct daemon* daemon)
 502 {
 503         int i;
 504         log_assert(daemon);
 505         verbose(VERB_ALGO, "start threads");
 506         /* skip i=0, is this thread */
 507         for(i=1; i<daemon->num; i++) {
 508                 ub_thread_create(&daemon->workers[i]->thr_id,
 509                         thread_start, daemon->workers[i]);
 510 #ifdef THREADS_DISABLED
 511                 /* close pipe end of child */
 512                 tube_close_read(daemon->workers[i]->cmd);
 513 #endif /* no threads */
 514         }
 515 }
 516
 517 /**
 518  * Stop the other threads.
 519  * @param daemon: the daemon with other threads.
 520  */
 521 static void
 522 daemon_stop_others(struct daemon* daemon)
 523 {
 524         int i;
 525         log_assert(daemon);
 526         verbose(VERB_ALGO, "stop threads");
 527         /* skip i=0, is this thread */
 528         /* use i=0 buffer for sending cmds; because we are #0 */
 529         for(i=1; i<daemon->num; i++) {
 530                 worker_send_cmd(daemon->workers[i], worker_cmd_quit);
 531         }
 532         /* wait for them to quit */
 533         for(i=1; i<daemon->num; i++) {
 534                 /* join it to make sure its dead */
 535                 verbose(VERB_ALGO, "join %d", i);
 536                 ub_thread_join(daemon->workers[i]->thr_id);
 537                 verbose(VERB_ALGO, "join success %d", i);
 538         }
 539 }
 540
 541 void
 542 daemon_fork(struct daemon* daemon)
 543 {
 544         log_assert(daemon);
 545         if(!acl_list_apply_cfg(daemon->acl, daemon->cfg))
 546                 fatal_exit("Could not setup access control list");
 547         if(!(daemon->local_zones = local_zones_create()))
 548                 fatal_exit("Could not create local zones: out of memory");
 549         if(!local_zones_apply_cfg(daemon->local_zones, daemon->cfg))
 550                 fatal_exit("Could not set up local zones");
 551
 552         /* setup modules */
 553         daemon_setup_modules(daemon);
 554
 555         /* first create all the worker structures, so we can pass
 556          * them to the newly created threads.
 557          */
 558         daemon_create_workers(daemon);
 559
 560 #if defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)
 561         /* in libev the first inited base gets signals */
 562         if(!worker_init(daemon->workers[0], daemon->cfg, daemon->ports[0], 1))
 563                 fatal_exit("Could not initialize main thread");
 564 #endif
 565
 566         /* Now create the threads and init the workers.
 567          * By the way, this is thread #0 (the main thread).
 568          */
 569         daemon_start_others(daemon);
 570
 571         /* Special handling for the main thread. This is the thread
 572          * that handles signals and remote control.
 573          */
 574 #if !(defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP))
 575         /* libevent has the last inited base get signals (or any base) */
 576         if(!worker_init(daemon->workers[0], daemon->cfg, daemon->ports[0], 1))
 577                 fatal_exit("Could not initialize main thread");
 578 #endif
 579         signal_handling_playback(daemon->workers[0]);
 580
 581         /* Start resolver service on main thread. */
 582         log_info("start of service (%s).", PACKAGE_STRING);
 583         worker_work(daemon->workers[0]);
 584         log_info("service stopped (%s).", PACKAGE_STRING);
 585
 586         /* we exited! a signal happened! Stop other threads */
 587         daemon_stop_others(daemon);
 588
 589         daemon->need_to_exit = daemon->workers[0]->need_to_exit;
 590 }
 591
 592 void
 593 daemon_cleanup(struct daemon* daemon)
 594 {
 595         int i;
 596         log_assert(daemon);
 597         /* before stopping main worker, handle signals ourselves, so we
 598            don't die on multiple reload signals for example. */
 599         signal_handling_record();
 600         log_thread_set(NULL);
 601         /* clean up caches because
 602          * a) RRset IDs will be recycled after a reload, causing collisions
 603          * b) validation config can change, thus rrset, msg, keycache clear */
 604         slabhash_clear(&daemon->env->rrset_cache->table);
 605         slabhash_clear(daemon->env->msg_cache);
 606         local_zones_delete(daemon->local_zones);
 607         daemon->local_zones = NULL;
 608         /* key cache is cleared by module desetup during next daemon_fork() */
 609         daemon_remote_clear(daemon->rc);
 610         for(i=0; i<daemon->num; i++)
 611                 worker_delete(daemon->workers[i]);
 612         free(daemon->workers);
 613         daemon->workers = NULL;
 614         daemon->num = 0;
 615 #ifdef USE_DNSTAP
 616         dt_delete(daemon->dtenv);
 617 #endif
 618         daemon->cfg = NULL;
 619 }
 620
 621 void
 622 daemon_delete(struct daemon* daemon)
 623 {
 624         size_t i;
 625         if(!daemon)
 626                 return;
 627         modstack_desetup(&daemon->mods, daemon->env);
 628         daemon_remote_delete(daemon->rc);
 629         for(i = 0; i < daemon->num_ports; i++)
 630                 listening_ports_free(daemon->ports[i]);
 631         free(daemon->ports);
 632         listening_ports_free(daemon->rc_ports);
 633         if(daemon->env) {
 634                 slabhash_delete(daemon->env->msg_cache);
 635                 rrset_cache_delete(daemon->env->rrset_cache);
 636                 infra_delete(daemon->env->infra_cache);
 637         }
 638         ub_randfree(daemon->rand);
 639         alloc_clear(&daemon->superalloc);
 640         acl_list_delete(daemon->acl);
 641         free(daemon->chroot);
 642         free(daemon->pidfile);
 643         free(daemon->env);
 644 #ifdef HAVE_SSL
 645         SSL_CTX_free((SSL_CTX*)daemon->listen_sslctx);
 646         SSL_CTX_free((SSL_CTX*)daemon->connect_sslctx);
 647 #endif
 648         free(daemon);
 649 #ifdef LEX_HAS_YYLEX_DESTROY
 650         /* lex cleanup */
 651         ub_c_lex_destroy();
 652 #endif
 653         /* libcrypto cleanup */
 654 #ifdef HAVE_SSL
 655 #  if defined(USE_GOST) && defined(HAVE_LDNS_KEY_EVP_UNLOAD_GOST)
 656         sldns_key_EVP_unload_gost();
 657 #  endif
 658 #  if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS && HAVE_DECL_SK_SSL_COMP_POP_FREE
 659 #    ifndef S_SPLINT_S
 660 #      if OPENSSL_VERSION_NUMBER < 0x10100000
 661         sk_SSL_COMP_pop_free(comp_meth, (void(*)())CRYPTO_free);
 662 #      endif
 663 #    endif
 664 #  endif
 665 #  ifdef HAVE_OPENSSL_CONFIG
 666         EVP_cleanup();
 667 #  if OPENSSL_VERSION_NUMBER < 0x10100000
 668         ENGINE_cleanup();
 669 #  endif
 670         CONF_modules_free();
 671 #  endif
 672 #  ifdef HAVE_CRYPTO_CLEANUP_ALL_EX_DATA
 673         CRYPTO_cleanup_all_ex_data(); /* safe, no more threads right now */
 674 #  endif
 675 #  ifdef HAVE_ERR_FREE_STRINGS
 676         ERR_free_strings();
 677 #  endif
 678 #  if OPENSSL_VERSION_NUMBER < 0x10100000
 679         RAND_cleanup();
 680 #  endif
 681 #  if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED)
 682         ub_openssl_lock_delete();
 683 #  endif
 684 #elif defined(HAVE_NSS)
 685         NSS_Shutdown();
 686 #endif /* HAVE_SSL or HAVE_NSS */
 687         checklock_stop();
 688 #ifdef USE_WINSOCK
 689         if(WSACleanup() != 0) {
 690                 log_err("Could not WSACleanup: %s",
 691                         wsa_strerror(WSAGetLastError()));
 692         }
 693 #endif
 694 }
 695
 696 void daemon_apply_cfg(struct daemon* daemon, struct config_file* cfg)
 697 {
 698         daemon->cfg = cfg;
 699         config_apply(cfg);
 700         if(!daemon->env->msg_cache ||
 701            cfg->msg_cache_size != slabhash_get_size(daemon->env->msg_cache) ||
 702            cfg->msg_cache_slabs != daemon->env->msg_cache->size) {
 703                 slabhash_delete(daemon->env->msg_cache);
 704                 daemon->env->msg_cache = slabhash_create(cfg->msg_cache_slabs,
 705                         HASH_DEFAULT_STARTARRAY, cfg->msg_cache_size,
 706                         msgreply_sizefunc, query_info_compare,
 707                         query_entry_delete, reply_info_delete, NULL);
 708                 if(!daemon->env->msg_cache) {
 709                         fatal_exit("malloc failure updating config settings");
 710                 }
 711         }
 712         if((daemon->env->rrset_cache = rrset_cache_adjust(
 713                 daemon->env->rrset_cache, cfg, &daemon->superalloc)) == 0)
 714                 fatal_exit("malloc failure updating config settings");
 715         if((daemon->env->infra_cache = infra_adjust(daemon->env->infra_cache,
 716                 cfg))==0)
 717                 fatal_exit("malloc failure updating config settings");
 718 }