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 USE_GOST
 210         (void)sldns_key_EVP_load_gost_id();
 211 #  endif
 212         OpenSSL_add_all_algorithms();
 213 #  if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS
 214         /* grab the COMP method ptr because openssl leaks it */
 215         comp_meth = (void*)SSL_COMP_get_compression_methods();
 216 #  endif
 217         (void)SSL_library_init();
 218 #  if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED)
 219         if(!ub_openssl_lock_init())
 220                 fatal_exit("could not init openssl locks");
 221 #  endif
 222 #elif defined(HAVE_NSS)
 223         if(NSS_NoDB_Init(NULL) != SECSuccess)
 224                 fatal_exit("could not init NSS");
 225 #endif /* HAVE_SSL or HAVE_NSS */
 226 #ifdef HAVE_TZSET
 227         /* init timezone info while we are not chrooted yet */
 228         tzset();
 229 #endif
 230         /* open /dev/random if needed */
 231         ub_systemseed((unsigned)time(NULL)^(unsigned)getpid()^0xe67);
 232         daemon->need_to_exit = 0;
 233         modstack_init(&daemon->mods);
 234         if(!(daemon->env = (struct module_env*)calloc(1,
 235                 sizeof(*daemon->env)))) {
 236                 free(daemon);
 237                 return NULL;
 238         }
 239         alloc_init(&daemon->superalloc, NULL, 0);
 240         daemon->acl = acl_list_create();
 241         if(!daemon->acl) {
 242                 free(daemon->env);
 243                 free(daemon);
 244                 return NULL;
 245         }
 246         if(gettimeofday(&daemon->time_boot, NULL) < 0)
 247                 log_err("gettimeofday: %s", strerror(errno));
 248         daemon->time_last_stat = daemon->time_boot;
 249         return daemon;
 250 }
 251
 252 int
 253 daemon_open_shared_ports(struct daemon* daemon)
 254 {
 255         log_assert(daemon);
 256         if(daemon->cfg->port != daemon->listening_port) {
 257                 size_t i;
 258                 struct listen_port* p0;
 259                 daemon->reuseport = 0;
 260                 /* free and close old ports */
 261                 if(daemon->ports != NULL) {
 262                         for(i=0; i<daemon->num_ports; i++)
 263                                 listening_ports_free(daemon->ports[i]);
 264                         free(daemon->ports);
 265                         daemon->ports = NULL;
 266                 }
 267                 /* see if we want to reuseport */
 268 #ifdef SO_REUSEPORT
 269                 if(daemon->cfg->so_reuseport && daemon->cfg->num_threads > 0)
 270                         daemon->reuseport = 1;
 271 #endif
 272                 /* try to use reuseport */
 273                 p0 = listening_ports_open(daemon->cfg, &daemon->reuseport);
 274                 if(!p0) {
 275                         listening_ports_free(p0);
 276                         return 0;
 277                 }
 278                 if(daemon->reuseport) {
 279                         /* reuseport was successful, allocate for it */
 280                         daemon->num_ports = (size_t)daemon->cfg->num_threads;
 281                 } else {
 282                         /* do the normal, singleportslist thing,
 283                          * reuseport not enabled or did not work */
 284                         daemon->num_ports = 1;
 285                 }
 286                 if(!(daemon->ports = (struct listen_port**)calloc(
 287                         daemon->num_ports, sizeof(*daemon->ports)))) {
 288                         listening_ports_free(p0);
 289                         return 0;
 290                 }
 291                 daemon->ports[0] = p0;
 292                 if(daemon->reuseport) {
 293                         /* continue to use reuseport */
 294                         for(i=1; i<daemon->num_ports; i++) {
 295                                 if(!(daemon->ports[i]=
 296                                         listening_ports_open(daemon->cfg,
 297                                                 &daemon->reuseport))
 298                                         || !daemon->reuseport ) {
 299                                         for(i=0; i<daemon->num_ports; i++)
 300                                                 listening_ports_free(daemon->ports[i]);
 301                                         free(daemon->ports);
 302                                         daemon->ports = NULL;
 303                                         return 0;
 304                                 }
 305                         }
 306                 }
 307                 daemon->listening_port = daemon->cfg->port;
 308         }
 309         if(!daemon->cfg->remote_control_enable && daemon->rc_port) {
 310                 listening_ports_free(daemon->rc_ports);
 311                 daemon->rc_ports = NULL;
 312                 daemon->rc_port = 0;
 313         }
 314         if(daemon->cfg->remote_control_enable &&
 315                 daemon->cfg->control_port != daemon->rc_port) {
 316                 listening_ports_free(daemon->rc_ports);
 317                 if(!(daemon->rc_ports=daemon_remote_open_ports(daemon->cfg)))
 318                         return 0;
 319                 daemon->rc_port = daemon->cfg->control_port;
 320         }
 321         return 1;
 322 }
 323
 324 /**
 325  * Setup modules. setup module stack.
 326  * @param daemon: the daemon
 327  */
 328 static void daemon_setup_modules(struct daemon* daemon)
 329 {
 330         daemon->env->cfg = daemon->cfg;
 331         daemon->env->alloc = &daemon->superalloc;
 332         daemon->env->worker = NULL;
 333         daemon->env->need_to_validate = 0; /* set by module init below */
 334         if(!modstack_setup(&daemon->mods, daemon->cfg->module_conf,
 335                 daemon->env)) {
 336                 fatal_exit("failed to setup modules");
 337         }
 338 }
 339
 340 /**
 341  * Obtain allowed port numbers, concatenate the list, and shuffle them
 342  * (ready to be handed out to threads).
 343  * @param daemon: the daemon. Uses rand and cfg.
 344  * @param shufport: the portlist output.
 345  * @return number of ports available.
 346  */
 347 static int daemon_get_shufport(struct daemon* daemon, int* shufport)
 348 {
 349         int i, n, k, temp;
 350         int avail = 0;
 351         for(i=0; i<65536; i++) {
 352                 if(daemon->cfg->outgoing_avail_ports[i]) {
 353                         shufport[avail++] = daemon->cfg->
 354                                 outgoing_avail_ports[i];
 355                 }
 356         }
 357         if(avail == 0)
 358                 fatal_exit("no ports are permitted for UDP, add "
 359                         "with outgoing-port-permit");
 360         /* Knuth shuffle */
 361         n = avail;
 362         while(--n > 0) {
 363                 k = ub_random_max(daemon->rand, n+1); /* 0<= k<= n */
 364                 temp = shufport[k];
 365                 shufport[k] = shufport[n];
 366                 shufport[n] = temp;
 367         }
 368         return avail;
 369 }
 370
 371 /**
 372  * Allocate empty worker structures. With backptr and thread-number,
 373  * from 0..numthread initialised. Used as user arguments to new threads.
 374  * Creates the daemon random generator if it does not exist yet.
 375  * The random generator stays existing between reloads with a unique state.
 376  * @param daemon: the daemon with (new) config settings.
 377  */
 378 static void
 379 daemon_create_workers(struct daemon* daemon)
 380 {
 381         int i, numport;
 382         int* shufport;
 383         log_assert(daemon && daemon->cfg);
 384         if(!daemon->rand) {
 385                 unsigned int seed = (unsigned int)time(NULL) ^
 386                         (unsigned int)getpid() ^ 0x438;
 387                 daemon->rand = ub_initstate(seed, NULL);
 388                 if(!daemon->rand)
 389                         fatal_exit("could not init random generator");
 390         }
 391         hash_set_raninit((uint32_t)ub_random(daemon->rand));
 392         shufport = (int*)calloc(65536, sizeof(int));
 393         if(!shufport)
 394                 fatal_exit("out of memory during daemon init");
 395         numport = daemon_get_shufport(daemon, shufport);
 396         verbose(VERB_ALGO, "total of %d outgoing ports available", numport);
 397
 398         daemon->num = (daemon->cfg->num_threads?daemon->cfg->num_threads:1);
 399         if(daemon->reuseport && (int)daemon->num < (int)daemon->num_ports) {
 400                 log_warn("cannot reduce num-threads to %d because so-reuseport "
 401                         "so continuing with %d threads.", (int)daemon->num,
 402                         (int)daemon->num_ports);
 403                 daemon->num = (int)daemon->num_ports;
 404         }
 405         daemon->workers = (struct worker**)calloc((size_t)daemon->num,
 406                 sizeof(struct worker*));
 407         if(daemon->cfg->dnstap) {
 408 #ifdef USE_DNSTAP
 409                 daemon->dtenv = dt_create(daemon->cfg->dnstap_socket_path,
 410                         (unsigned int)daemon->num);
 411                 if (!daemon->dtenv)
 412                         fatal_exit("dt_create failed");
 413                 dt_apply_cfg(daemon->dtenv, daemon->cfg);
 414 #else
 415                 fatal_exit("dnstap enabled in config but not built with dnstap support");
 416 #endif
 417         }
 418         for(i=0; i<daemon->num; i++) {
 419                 if(!(daemon->workers[i] = worker_create(daemon, i,
 420                         shufport+numport*i/daemon->num,
 421                         numport*(i+1)/daemon->num - numport*i/daemon->num)))
 422                         /* the above is not ports/numthr, due to rounding */
 423                         fatal_exit("could not create worker");
 424         }
 425         free(shufport);
 426 }
 427
 428 #ifdef THREADS_DISABLED
 429 /**
 430  * Close all pipes except for the numbered thread.
 431  * @param daemon: daemon to close pipes in.
 432  * @param thr: thread number 0..num-1 of thread to skip.
 433  */
 434 static void close_other_pipes(struct daemon* daemon, int thr)
 435 {
 436         int i;
 437         for(i=0; i<daemon->num; i++)
 438                 if(i!=thr) {
 439                         if(i==0) {
 440                                 /* only close read part, need to write stats */
 441                                 tube_close_read(daemon->workers[i]->cmd);
 442                         } else {
 443                                 /* complete close channel to others */
 444                                 tube_delete(daemon->workers[i]->cmd);
 445                                 daemon->workers[i]->cmd = NULL;
 446                         }
 447                 }
 448 }
 449 #endif /* THREADS_DISABLED */
 450
 451 /**
 452  * Function to start one thread.
 453  * @param arg: user argument.
 454  * @return: void* user return value could be used for thread_join results.
 455  */
 456 static void*
 457 thread_start(void* arg)
 458 {
 459         struct worker* worker = (struct worker*)arg;
 460         int port_num = 0;
 461         log_thread_set(&worker->thread_num);
 462         ub_thread_blocksigs();
 463 #ifdef THREADS_DISABLED
 464         /* close pipe ends used by main */
 465         tube_close_write(worker->cmd);
 466         close_other_pipes(worker->daemon, worker->thread_num);
 467 #endif
 468 #ifdef SO_REUSEPORT
 469         if(worker->daemon->cfg->so_reuseport)
 470                 port_num = worker->thread_num % worker->daemon->num_ports;
 471         else
 472                 port_num = 0;
 473 #endif
 474         if(!worker_init(worker, worker->daemon->cfg,
 475                         worker->daemon->ports[port_num], 0))
 476                 fatal_exit("Could not initialize thread");
 477
 478         worker_work(worker);
 479         return NULL;
 480 }
 481
 482 /**
 483  * Fork and init the other threads. Main thread returns for special handling.
 484  * @param daemon: the daemon with other threads to fork.
 485  */
 486 static void
 487 daemon_start_others(struct daemon* daemon)
 488 {
 489         int i;
 490         log_assert(daemon);
 491         verbose(VERB_ALGO, "start threads");
 492         /* skip i=0, is this thread */
 493         for(i=1; i<daemon->num; i++) {
 494                 ub_thread_create(&daemon->workers[i]->thr_id,
 495                         thread_start, daemon->workers[i]);
 496 #ifdef THREADS_DISABLED
 497                 /* close pipe end of child */
 498                 tube_close_read(daemon->workers[i]->cmd);
 499 #endif /* no threads */
 500         }
 501 }
 502
 503 /**
 504  * Stop the other threads.
 505  * @param daemon: the daemon with other threads.
 506  */
 507 static void
 508 daemon_stop_others(struct daemon* daemon)
 509 {
 510         int i;
 511         log_assert(daemon);
 512         verbose(VERB_ALGO, "stop threads");
 513         /* skip i=0, is this thread */
 514         /* use i=0 buffer for sending cmds; because we are #0 */
 515         for(i=1; i<daemon->num; i++) {
 516                 worker_send_cmd(daemon->workers[i], worker_cmd_quit);
 517         }
 518         /* wait for them to quit */
 519         for(i=1; i<daemon->num; i++) {
 520                 /* join it to make sure its dead */
 521                 verbose(VERB_ALGO, "join %d", i);
 522                 ub_thread_join(daemon->workers[i]->thr_id);
 523                 verbose(VERB_ALGO, "join success %d", i);
 524         }
 525 }
 526
 527 void
 528 daemon_fork(struct daemon* daemon)
 529 {
 530         log_assert(daemon);
 531         if(!acl_list_apply_cfg(daemon->acl, daemon->cfg))
 532                 fatal_exit("Could not setup access control list");
 533         if(!(daemon->local_zones = local_zones_create()))
 534                 fatal_exit("Could not create local zones: out of memory");
 535         if(!local_zones_apply_cfg(daemon->local_zones, daemon->cfg))
 536                 fatal_exit("Could not set up local zones");
 537
 538         /* setup modules */
 539         daemon_setup_modules(daemon);
 540
 541         /* first create all the worker structures, so we can pass
 542          * them to the newly created threads.
 543          */
 544         daemon_create_workers(daemon);
 545
 546 #if defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)
 547         /* in libev the first inited base gets signals */
 548         if(!worker_init(daemon->workers[0], daemon->cfg, daemon->ports[0], 1))
 549                 fatal_exit("Could not initialize main thread");
 550 #endif
 551
 552         /* Now create the threads and init the workers.
 553          * By the way, this is thread #0 (the main thread).
 554          */
 555         daemon_start_others(daemon);
 556
 557         /* Special handling for the main thread. This is the thread
 558          * that handles signals and remote control.
 559          */
 560 #if !(defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP))
 561         /* libevent has the last inited base get signals (or any base) */
 562         if(!worker_init(daemon->workers[0], daemon->cfg, daemon->ports[0], 1))
 563                 fatal_exit("Could not initialize main thread");
 564 #endif
 565         signal_handling_playback(daemon->workers[0]);
 566
 567         /* Start resolver service on main thread. */
 568         log_info("start of service (%s).", PACKAGE_STRING);
 569         worker_work(daemon->workers[0]);
 570         log_info("service stopped (%s).", PACKAGE_STRING);
 571
 572         /* we exited! a signal happened! Stop other threads */
 573         daemon_stop_others(daemon);
 574
 575         daemon->need_to_exit = daemon->workers[0]->need_to_exit;
 576 }
 577
 578 void
 579 daemon_cleanup(struct daemon* daemon)
 580 {
 581         int i;
 582         log_assert(daemon);
 583         /* before stopping main worker, handle signals ourselves, so we
 584            don't die on multiple reload signals for example. */
 585         signal_handling_record();
 586         log_thread_set(NULL);
 587         /* clean up caches because
 588          * a) RRset IDs will be recycled after a reload, causing collisions
 589          * b) validation config can change, thus rrset, msg, keycache clear
 590          * The infra cache is kept, the timing and edns info is still valid */
 591         slabhash_clear(&daemon->env->rrset_cache->table);
 592         slabhash_clear(daemon->env->msg_cache);
 593         local_zones_delete(daemon->local_zones);
 594         daemon->local_zones = NULL;
 595         /* key cache is cleared by module desetup during next daemon_init() */
 596         daemon_remote_clear(daemon->rc);
 597         for(i=0; i<daemon->num; i++)
 598                 worker_delete(daemon->workers[i]);
 599         free(daemon->workers);
 600         daemon->workers = NULL;
 601         daemon->num = 0;
 602 #ifdef USE_DNSTAP
 603         dt_delete(daemon->dtenv);
 604 #endif
 605         daemon->cfg = NULL;
 606 }
 607
 608 void
 609 daemon_delete(struct daemon* daemon)
 610 {
 611         size_t i;
 612         if(!daemon)
 613                 return;
 614         modstack_desetup(&daemon->mods, daemon->env);
 615         daemon_remote_delete(daemon->rc);
 616         for(i = 0; i < daemon->num_ports; i++)
 617                 listening_ports_free(daemon->ports[i]);
 618         free(daemon->ports);
 619         listening_ports_free(daemon->rc_ports);
 620         if(daemon->env) {
 621                 slabhash_delete(daemon->env->msg_cache);
 622                 rrset_cache_delete(daemon->env->rrset_cache);
 623                 infra_delete(daemon->env->infra_cache);
 624         }
 625         ub_randfree(daemon->rand);
 626         alloc_clear(&daemon->superalloc);
 627         acl_list_delete(daemon->acl);
 628         free(daemon->chroot);
 629         free(daemon->pidfile);
 630         free(daemon->env);
 631 #ifdef HAVE_SSL
 632         SSL_CTX_free((SSL_CTX*)daemon->listen_sslctx);
 633         SSL_CTX_free((SSL_CTX*)daemon->connect_sslctx);
 634 #endif
 635         free(daemon);
 636 #ifdef LEX_HAS_YYLEX_DESTROY
 637         /* lex cleanup */
 638         ub_c_lex_destroy();
 639 #endif
 640         /* libcrypto cleanup */
 641 #ifdef HAVE_SSL
 642 #  if defined(USE_GOST) && defined(HAVE_LDNS_KEY_EVP_UNLOAD_GOST)
 643         sldns_key_EVP_unload_gost();
 644 #  endif
 645 #  if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS && HAVE_DECL_SK_SSL_COMP_POP_FREE
 646 #    ifndef S_SPLINT_S
 647 #      if OPENSSL_VERSION_NUMBER < 0x10100000
 648         sk_SSL_COMP_pop_free(comp_meth, (void(*)())CRYPTO_free);
 649 #      endif
 650 #    endif
 651 #  endif
 652 #  ifdef HAVE_OPENSSL_CONFIG
 653         EVP_cleanup();
 654 #  if OPENSSL_VERSION_NUMBER < 0x10100000
 655         ENGINE_cleanup();
 656 #  endif
 657         CONF_modules_free();
 658 #  endif
 659         CRYPTO_cleanup_all_ex_data(); /* safe, no more threads right now */
 660         ERR_free_strings();
 661 #  if OPENSSL_VERSION_NUMBER < 0x10100000
 662         RAND_cleanup();
 663 #  endif
 664 #  if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED)
 665         ub_openssl_lock_delete();
 666 #  endif
 667 #elif defined(HAVE_NSS)
 668         NSS_Shutdown();
 669 #endif /* HAVE_SSL or HAVE_NSS */
 670         checklock_stop();
 671 #ifdef USE_WINSOCK
 672         if(WSACleanup() != 0) {
 673                 log_err("Could not WSACleanup: %s",
 674                         wsa_strerror(WSAGetLastError()));
 675         }
 676 #endif
 677 }
 678
 679 void daemon_apply_cfg(struct daemon* daemon, struct config_file* cfg)
 680 {
 681         daemon->cfg = cfg;
 682         config_apply(cfg);
 683         if(!daemon->env->msg_cache ||
 684            cfg->msg_cache_size != slabhash_get_size(daemon->env->msg_cache) ||
 685            cfg->msg_cache_slabs != daemon->env->msg_cache->size) {
 686                 slabhash_delete(daemon->env->msg_cache);
 687                 daemon->env->msg_cache = slabhash_create(cfg->msg_cache_slabs,
 688                         HASH_DEFAULT_STARTARRAY, cfg->msg_cache_size,
 689                         msgreply_sizefunc, query_info_compare,
 690                         query_entry_delete, reply_info_delete, NULL);
 691                 if(!daemon->env->msg_cache) {
 692                         fatal_exit("malloc failure updating config settings");
 693                 }
 694         }
 695         if((daemon->env->rrset_cache = rrset_cache_adjust(
 696                 daemon->env->rrset_cache, cfg, &daemon->superalloc)) == 0)
 697                 fatal_exit("malloc failure updating config settings");
 698         if((daemon->env->infra_cache = infra_adjust(daemon->env->infra_cache,
 699                 cfg))==0)
 700                 fatal_exit("malloc failure updating config settings");
 701 }