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         ERR_load_crypto_strings();
 208         ERR_load_SSL_strings();
 209 #  ifdef HAVE_OPENSSL_CONFIG
 210         OPENSSL_config("unbound");
 211 #  endif
 212 #  ifdef USE_GOST
 213         (void)sldns_key_EVP_load_gost_id();
 214 #  endif
 215         OpenSSL_add_all_algorithms();
 216 #  if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS
 217         /* grab the COMP method ptr because openssl leaks it */
 218         comp_meth = (void*)SSL_COMP_get_compression_methods();
 219 #  endif
 220         (void)SSL_library_init();
 221 #  if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED)
 222         if(!ub_openssl_lock_init())
 223                 fatal_exit("could not init openssl locks");
 224 #  endif
 225 #elif defined(HAVE_NSS)
 226         if(NSS_NoDB_Init(NULL) != SECSuccess)
 227                 fatal_exit("could not init NSS");
 228 #endif /* HAVE_SSL or HAVE_NSS */
 229 #ifdef HAVE_TZSET
 230         /* init timezone info while we are not chrooted yet */
 231         tzset();
 232 #endif
 233         /* open /dev/random if needed */
 234         ub_systemseed((unsigned)time(NULL)^(unsigned)getpid()^0xe67);
 235         daemon->need_to_exit = 0;
 236         modstack_init(&daemon->mods);
 237         if(!(daemon->env = (struct module_env*)calloc(1,
 238                 sizeof(*daemon->env)))) {
 239                 free(daemon);
 240                 return NULL;
 241         }
 242         alloc_init(&daemon->superalloc, NULL, 0);
 243         daemon->acl = acl_list_create();
 244         if(!daemon->acl) {
 245                 free(daemon->env);
 246                 free(daemon);
 247                 return NULL;
 248         }
 249         if(gettimeofday(&daemon->time_boot, NULL) < 0)
 250                 log_err("gettimeofday: %s", strerror(errno));
 251         daemon->time_last_stat = daemon->time_boot;
 252         return daemon;
 253 }
 254
 255 int
 256 daemon_open_shared_ports(struct daemon* daemon)
 257 {
 258         log_assert(daemon);
 259         if(daemon->cfg->port != daemon->listening_port) {
 260                 size_t i;
 261                 struct listen_port* p0;
 262                 daemon->reuseport = 0;
 263                 /* free and close old ports */
 264                 if(daemon->ports != NULL) {
 265                         for(i=0; i<daemon->num_ports; i++)
 266                                 listening_ports_free(daemon->ports[i]);
 267                         free(daemon->ports);
 268                         daemon->ports = NULL;
 269                 }
 270                 /* see if we want to reuseport */
 271 #ifdef SO_REUSEPORT
 272                 if(daemon->cfg->so_reuseport && daemon->cfg->num_threads > 0)
 273                         daemon->reuseport = 1;
 274 #endif
 275                 /* try to use reuseport */
 276                 p0 = listening_ports_open(daemon->cfg, &daemon->reuseport);
 277                 if(!p0) {
 278                         listening_ports_free(p0);
 279                         return 0;
 280                 }
 281                 if(daemon->reuseport) {
 282                         /* reuseport was successful, allocate for it */
 283                         daemon->num_ports = (size_t)daemon->cfg->num_threads;
 284                 } else {
 285                         /* do the normal, singleportslist thing,
 286                          * reuseport not enabled or did not work */
 287                         daemon->num_ports = 1;
 288                 }
 289                 if(!(daemon->ports = (struct listen_port**)calloc(
 290                         daemon->num_ports, sizeof(*daemon->ports)))) {
 291                         listening_ports_free(p0);
 292                         return 0;
 293                 }
 294                 daemon->ports[0] = p0;
 295                 if(daemon->reuseport) {
 296                         /* continue to use reuseport */
 297                         for(i=1; i<daemon->num_ports; i++) {
 298                                 if(!(daemon->ports[i]=
 299                                         listening_ports_open(daemon->cfg,
 300                                                 &daemon->reuseport))
 301                                         || !daemon->reuseport ) {
 302                                         for(i=0; i<daemon->num_ports; i++)
 303                                                 listening_ports_free(daemon->ports[i]);
 304                                         free(daemon->ports);
 305                                         daemon->ports = NULL;
 306                                         return 0;
 307                                 }
 308                         }
 309                 }
 310                 daemon->listening_port = daemon->cfg->port;
 311         }
 312         if(!daemon->cfg->remote_control_enable && daemon->rc_port) {
 313                 listening_ports_free(daemon->rc_ports);
 314                 daemon->rc_ports = NULL;
 315                 daemon->rc_port = 0;
 316         }
 317         if(daemon->cfg->remote_control_enable &&
 318                 daemon->cfg->control_port != daemon->rc_port) {
 319                 listening_ports_free(daemon->rc_ports);
 320                 if(!(daemon->rc_ports=daemon_remote_open_ports(daemon->cfg)))
 321                         return 0;
 322                 daemon->rc_port = daemon->cfg->control_port;
 323         }
 324         return 1;
 325 }
 326
 327 /**
 328  * Setup modules. setup module stack.
 329  * @param daemon: the daemon
 330  */
 331 static void daemon_setup_modules(struct daemon* daemon)
 332 {
 333         daemon->env->cfg = daemon->cfg;
 334         daemon->env->alloc = &daemon->superalloc;
 335         daemon->env->worker = NULL;
 336         daemon->env->need_to_validate = 0; /* set by module init below */
 337         if(!modstack_setup(&daemon->mods, daemon->cfg->module_conf,
 338                 daemon->env)) {
 339                 fatal_exit("failed to setup modules");
 340         }
 341 }
 342
 343 /**
 344  * Obtain allowed port numbers, concatenate the list, and shuffle them
 345  * (ready to be handed out to threads).
 346  * @param daemon: the daemon. Uses rand and cfg.
 347  * @param shufport: the portlist output.
 348  * @return number of ports available.
 349  */
 350 static int daemon_get_shufport(struct daemon* daemon, int* shufport)
 351 {
 352         int i, n, k, temp;
 353         int avail = 0;
 354         for(i=0; i<65536; i++) {
 355                 if(daemon->cfg->outgoing_avail_ports[i]) {
 356                         shufport[avail++] = daemon->cfg->
 357                                 outgoing_avail_ports[i];
 358                 }
 359         }
 360         if(avail == 0)
 361                 fatal_exit("no ports are permitted for UDP, add "
 362                         "with outgoing-port-permit");
 363         /* Knuth shuffle */
 364         n = avail;
 365         while(--n > 0) {
 366                 k = ub_random_max(daemon->rand, n+1); /* 0<= k<= n */
 367                 temp = shufport[k];
 368                 shufport[k] = shufport[n];
 369                 shufport[n] = temp;
 370         }
 371         return avail;
 372 }
 373
 374 /**
 375  * Allocate empty worker structures. With backptr and thread-number,
 376  * from 0..numthread initialised. Used as user arguments to new threads.
 377  * Creates the daemon random generator if it does not exist yet.
 378  * The random generator stays existing between reloads with a unique state.
 379  * @param daemon: the daemon with (new) config settings.
 380  */
 381 static void
 382 daemon_create_workers(struct daemon* daemon)
 383 {
 384         int i, numport;
 385         int* shufport;
 386         log_assert(daemon && daemon->cfg);
 387         if(!daemon->rand) {
 388                 unsigned int seed = (unsigned int)time(NULL) ^
 389                         (unsigned int)getpid() ^ 0x438;
 390                 daemon->rand = ub_initstate(seed, NULL);
 391                 if(!daemon->rand)
 392                         fatal_exit("could not init random generator");
 393         }
 394         hash_set_raninit((uint32_t)ub_random(daemon->rand));
 395         shufport = (int*)calloc(65536, sizeof(int));
 396         if(!shufport)
 397                 fatal_exit("out of memory during daemon init");
 398         numport = daemon_get_shufport(daemon, shufport);
 399         verbose(VERB_ALGO, "total of %d outgoing ports available", numport);
 400
 401         daemon->num = (daemon->cfg->num_threads?daemon->cfg->num_threads:1);
 402         if(daemon->reuseport && (int)daemon->num < (int)daemon->num_ports) {
 403                 log_warn("cannot reduce num-threads to %d because so-reuseport "
 404                         "so continuing with %d threads.", (int)daemon->num,
 405                         (int)daemon->num_ports);
 406                 daemon->num = (int)daemon->num_ports;
 407         }
 408         daemon->workers = (struct worker**)calloc((size_t)daemon->num,
 409                 sizeof(struct worker*));
 410         if(daemon->cfg->dnstap) {
 411 #ifdef USE_DNSTAP
 412                 daemon->dtenv = dt_create(daemon->cfg->dnstap_socket_path,
 413                         (unsigned int)daemon->num);
 414                 if (!daemon->dtenv)
 415                         fatal_exit("dt_create failed");
 416                 dt_apply_cfg(daemon->dtenv, daemon->cfg);
 417 #else
 418                 fatal_exit("dnstap enabled in config but not built with dnstap support");
 419 #endif
 420         }
 421         for(i=0; i<daemon->num; i++) {
 422                 if(!(daemon->workers[i] = worker_create(daemon, i,
 423                         shufport+numport*i/daemon->num,
 424                         numport*(i+1)/daemon->num - numport*i/daemon->num)))
 425                         /* the above is not ports/numthr, due to rounding */
 426                         fatal_exit("could not create worker");
 427         }
 428         free(shufport);
 429 }
 430
 431 #ifdef THREADS_DISABLED
 432 /**
 433  * Close all pipes except for the numbered thread.
 434  * @param daemon: daemon to close pipes in.
 435  * @param thr: thread number 0..num-1 of thread to skip.
 436  */
 437 static void close_other_pipes(struct daemon* daemon, int thr)
 438 {
 439         int i;
 440         for(i=0; i<daemon->num; i++)
 441                 if(i!=thr) {
 442                         if(i==0) {
 443                                 /* only close read part, need to write stats */
 444                                 tube_close_read(daemon->workers[i]->cmd);
 445                         } else {
 446                                 /* complete close channel to others */
 447                                 tube_delete(daemon->workers[i]->cmd);
 448                                 daemon->workers[i]->cmd = NULL;
 449                         }
 450                 }
 451 }
 452 #endif /* THREADS_DISABLED */
 453
 454 /**
 455  * Function to start one thread.
 456  * @param arg: user argument.
 457  * @return: void* user return value could be used for thread_join results.
 458  */
 459 static void*
 460 thread_start(void* arg)
 461 {
 462         struct worker* worker = (struct worker*)arg;
 463         int port_num = 0;
 464         log_thread_set(&worker->thread_num);
 465         ub_thread_blocksigs();
 466 #ifdef THREADS_DISABLED
 467         /* close pipe ends used by main */
 468         tube_close_write(worker->cmd);
 469         close_other_pipes(worker->daemon, worker->thread_num);
 470 #endif
 471 #ifdef SO_REUSEPORT
 472         if(worker->daemon->cfg->so_reuseport)
 473                 port_num = worker->thread_num % worker->daemon->num_ports;
 474         else
 475                 port_num = 0;
 476 #endif
 477         if(!worker_init(worker, worker->daemon->cfg,
 478                         worker->daemon->ports[port_num], 0))
 479                 fatal_exit("Could not initialize thread");
 480
 481         worker_work(worker);
 482         return NULL;
 483 }
 484
 485 /**
 486  * Fork and init the other threads. Main thread returns for special handling.
 487  * @param daemon: the daemon with other threads to fork.
 488  */
 489 static void
 490 daemon_start_others(struct daemon* daemon)
 491 {
 492         int i;
 493         log_assert(daemon);
 494         verbose(VERB_ALGO, "start threads");
 495         /* skip i=0, is this thread */
 496         for(i=1; i<daemon->num; i++) {
 497                 ub_thread_create(&daemon->workers[i]->thr_id,
 498                         thread_start, daemon->workers[i]);
 499 #ifdef THREADS_DISABLED
 500                 /* close pipe end of child */
 501                 tube_close_read(daemon->workers[i]->cmd);
 502 #endif /* no threads */
 503         }
 504 }
 505
 506 /**
 507  * Stop the other threads.
 508  * @param daemon: the daemon with other threads.
 509  */
 510 static void
 511 daemon_stop_others(struct daemon* daemon)
 512 {
 513         int i;
 514         log_assert(daemon);
 515         verbose(VERB_ALGO, "stop threads");
 516         /* skip i=0, is this thread */
 517         /* use i=0 buffer for sending cmds; because we are #0 */
 518         for(i=1; i<daemon->num; i++) {
 519                 worker_send_cmd(daemon->workers[i], worker_cmd_quit);
 520         }
 521         /* wait for them to quit */
 522         for(i=1; i<daemon->num; i++) {
 523                 /* join it to make sure its dead */
 524                 verbose(VERB_ALGO, "join %d", i);
 525                 ub_thread_join(daemon->workers[i]->thr_id);
 526                 verbose(VERB_ALGO, "join success %d", i);
 527         }
 528 }
 529
 530 void
 531 daemon_fork(struct daemon* daemon)
 532 {
 533         log_assert(daemon);
 534         if(!acl_list_apply_cfg(daemon->acl, daemon->cfg))
 535                 fatal_exit("Could not setup access control list");
 536         if(!(daemon->local_zones = local_zones_create()))
 537                 fatal_exit("Could not create local zones: out of memory");
 538         if(!local_zones_apply_cfg(daemon->local_zones, daemon->cfg))
 539                 fatal_exit("Could not set up local zones");
 540
 541         /* setup modules */
 542         daemon_setup_modules(daemon);
 543
 544         /* first create all the worker structures, so we can pass
 545          * them to the newly created threads.
 546          */
 547         daemon_create_workers(daemon);
 548
 549 #if defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)
 550         /* in libev the first inited base gets signals */
 551         if(!worker_init(daemon->workers[0], daemon->cfg, daemon->ports[0], 1))
 552                 fatal_exit("Could not initialize main thread");
 553 #endif
 554
 555         /* Now create the threads and init the workers.
 556          * By the way, this is thread #0 (the main thread).
 557          */
 558         daemon_start_others(daemon);
 559
 560         /* Special handling for the main thread. This is the thread
 561          * that handles signals and remote control.
 562          */
 563 #if !(defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP))
 564         /* libevent has the last inited base get signals (or any base) */
 565         if(!worker_init(daemon->workers[0], daemon->cfg, daemon->ports[0], 1))
 566                 fatal_exit("Could not initialize main thread");
 567 #endif
 568         signal_handling_playback(daemon->workers[0]);
 569
 570         /* Start resolver service on main thread. */
 571         log_info("start of service (%s).", PACKAGE_STRING);
 572         worker_work(daemon->workers[0]);
 573         log_info("service stopped (%s).", PACKAGE_STRING);
 574
 575         /* we exited! a signal happened! Stop other threads */
 576         daemon_stop_others(daemon);
 577
 578         daemon->need_to_exit = daemon->workers[0]->need_to_exit;
 579 }
 580
 581 void
 582 daemon_cleanup(struct daemon* daemon)
 583 {
 584         int i;
 585         log_assert(daemon);
 586         /* before stopping main worker, handle signals ourselves, so we
 587            don't die on multiple reload signals for example. */
 588         signal_handling_record();
 589         log_thread_set(NULL);
 590         /* clean up caches because
 591          * a) RRset IDs will be recycled after a reload, causing collisions
 592          * b) validation config can change, thus rrset, msg, keycache clear
 593          * The infra cache is kept, the timing and edns info is still valid */
 594         slabhash_clear(&daemon->env->rrset_cache->table);
 595         slabhash_clear(daemon->env->msg_cache);
 596         local_zones_delete(daemon->local_zones);
 597         daemon->local_zones = NULL;
 598         /* key cache is cleared by module desetup during next daemon_init() */
 599         daemon_remote_clear(daemon->rc);
 600         for(i=0; i<daemon->num; i++)
 601                 worker_delete(daemon->workers[i]);
 602         free(daemon->workers);
 603         daemon->workers = NULL;
 604         daemon->num = 0;
 605 #ifdef USE_DNSTAP
 606         dt_delete(daemon->dtenv);
 607 #endif
 608         daemon->cfg = NULL;
 609 }
 610
 611 void
 612 daemon_delete(struct daemon* daemon)
 613 {
 614         size_t i;
 615         if(!daemon)
 616                 return;
 617         modstack_desetup(&daemon->mods, daemon->env);
 618         daemon_remote_delete(daemon->rc);
 619         for(i = 0; i < daemon->num_ports; i++)
 620                 listening_ports_free(daemon->ports[i]);
 621         free(daemon->ports);
 622         listening_ports_free(daemon->rc_ports);
 623         if(daemon->env) {
 624                 slabhash_delete(daemon->env->msg_cache);
 625                 rrset_cache_delete(daemon->env->rrset_cache);
 626                 infra_delete(daemon->env->infra_cache);
 627         }
 628         ub_randfree(daemon->rand);
 629         alloc_clear(&daemon->superalloc);
 630         acl_list_delete(daemon->acl);
 631         free(daemon->chroot);
 632         free(daemon->pidfile);
 633         free(daemon->env);
 634 #ifdef HAVE_SSL
 635         SSL_CTX_free((SSL_CTX*)daemon->listen_sslctx);
 636         SSL_CTX_free((SSL_CTX*)daemon->connect_sslctx);
 637 #endif
 638         free(daemon);
 639 #ifdef LEX_HAS_YYLEX_DESTROY
 640         /* lex cleanup */
 641         ub_c_lex_destroy();
 642 #endif
 643         /* libcrypto cleanup */
 644 #ifdef HAVE_SSL
 645 #  if defined(USE_GOST) && defined(HAVE_LDNS_KEY_EVP_UNLOAD_GOST)
 646         sldns_key_EVP_unload_gost();
 647 #  endif
 648 #  if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS && HAVE_DECL_SK_SSL_COMP_POP_FREE
 649 #    ifndef S_SPLINT_S
 650         sk_SSL_COMP_pop_free(comp_meth, (void(*)())CRYPTO_free);
 651 #    endif
 652 #  endif
 653 #  ifdef HAVE_OPENSSL_CONFIG
 654         EVP_cleanup();
 655         ENGINE_cleanup();
 656         CONF_modules_free();
 657 #  endif
 658         CRYPTO_cleanup_all_ex_data(); /* safe, no more threads right now */
 659         ERR_remove_state(0);
 660         ERR_free_strings();
 661         RAND_cleanup();
 662 #  if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED)
 663         ub_openssl_lock_delete();
 664 #  endif
 665 #elif defined(HAVE_NSS)
 666         NSS_Shutdown();
 667 #endif /* HAVE_SSL or HAVE_NSS */
 668         checklock_stop();
 669 #ifdef USE_WINSOCK
 670         if(WSACleanup() != 0) {
 671                 log_err("Could not WSACleanup: %s",
 672                         wsa_strerror(WSAGetLastError()));
 673         }
 674 #endif
 675 }
 676
 677 void daemon_apply_cfg(struct daemon* daemon, struct config_file* cfg)
 678 {
 679         daemon->cfg = cfg;
 680         config_apply(cfg);
 681         if(!daemon->env->msg_cache ||
 682            cfg->msg_cache_size != slabhash_get_size(daemon->env->msg_cache) ||
 683            cfg->msg_cache_slabs != daemon->env->msg_cache->size) {
 684                 slabhash_delete(daemon->env->msg_cache);
 685                 daemon->env->msg_cache = slabhash_create(cfg->msg_cache_slabs,
 686                         HASH_DEFAULT_STARTARRAY, cfg->msg_cache_size,
 687                         msgreply_sizefunc, query_info_compare,
 688                         query_entry_delete, reply_info_delete, NULL);
 689                 if(!daemon->env->msg_cache) {
 690                         fatal_exit("malloc failure updating config settings");
 691                 }
 692         }
 693         if((daemon->env->rrset_cache = rrset_cache_adjust(
 694                 daemon->env->rrset_cache, cfg, &daemon->superalloc)) == 0)
 695                 fatal_exit("malloc failure updating config settings");
 696         if((daemon->env->infra_cache = infra_adjust(daemon->env->infra_cache,
 697                 cfg))==0)
 698                 fatal_exit("malloc failure updating config settings");
 699 }