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/shm_side/shm_main.h"
  77 #include "util/storage/lookup3.h"
  78 #include "util/storage/slabhash.h"
  79 #include "services/listen_dnsport.h"
  80 #include "services/cache/rrset.h"
  81 #include "services/cache/infra.h"
  82 #include "services/localzone.h"
  83 #include "services/view.h"
  84 #include "services/modstack.h"
  85 #include "util/module.h"
  86 #include "util/random.h"
  87 #include "util/tube.h"
  88 #include "util/net_help.h"
  89 #include "sldns/keyraw.h"
  90 #include "respip/respip.h"
  91 #include <signal.h>
  92
  93 #ifdef HAVE_SYSTEMD
  94 #include <systemd/sd-daemon.h>
  95 #endif
  96
  97 /** How many quit requests happened. */
  98 static int sig_record_quit = 0;
  99 /** How many reload requests happened. */
 100 static int sig_record_reload = 0;
 101
 102 #if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS
 103 /** cleaner ssl memory freeup */
 104 static void* comp_meth = NULL;
 105 #endif
 106 #ifdef LEX_HAS_YYLEX_DESTROY
 107 /** remove buffers for parsing and init */
 108 int ub_c_lex_destroy(void);
 109 #endif
 110
 111 /** used when no other sighandling happens, so we don't die
 112   * when multiple signals in quick succession are sent to us.
 113   * @param sig: signal number.
 114   * @return signal handler return type (void or int).
 115   */
 116 static RETSIGTYPE record_sigh(int sig)
 117 {
 118 #ifdef LIBEVENT_SIGNAL_PROBLEM
 119         /* cannot log, verbose here because locks may be held */
 120         /* quit on signal, no cleanup and statistics,
 121            because installed libevent version is not threadsafe */
 122         exit(0);
 123 #endif
 124         switch(sig)
 125         {
 126                 case SIGTERM:
 127 #ifdef SIGQUIT
 128                 case SIGQUIT:
 129 #endif
 130 #ifdef SIGBREAK
 131                 case SIGBREAK:
 132 #endif
 133                 case SIGINT:
 134                         sig_record_quit++;
 135                         break;
 136 #ifdef SIGHUP
 137                 case SIGHUP:
 138                         sig_record_reload++;
 139                         break;
 140 #endif
 141 #ifdef SIGPIPE
 142                 case SIGPIPE:
 143                         break;
 144 #endif
 145                 default:
 146                         /* ignoring signal */
 147                         break;
 148         }
 149 }
 150
 151 /**
 152  * Signal handling during the time when netevent is disabled.
 153  * Stores signals to replay later.
 154  */
 155 static void
 156 signal_handling_record(void)
 157 {
 158         if( signal(SIGTERM, record_sigh) == SIG_ERR ||
 159 #ifdef SIGQUIT
 160                 signal(SIGQUIT, record_sigh) == SIG_ERR ||
 161 #endif
 162 #ifdef SIGBREAK
 163                 signal(SIGBREAK, record_sigh) == SIG_ERR ||
 164 #endif
 165 #ifdef SIGHUP
 166                 signal(SIGHUP, record_sigh) == SIG_ERR ||
 167 #endif
 168 #ifdef SIGPIPE
 169                 signal(SIGPIPE, SIG_IGN) == SIG_ERR ||
 170 #endif
 171                 signal(SIGINT, record_sigh) == SIG_ERR
 172                 )
 173                 log_err("install sighandler: %s", strerror(errno));
 174 }
 175
 176 /**
 177  * Replay old signals.
 178  * @param wrk: worker that handles signals.
 179  */
 180 static void
 181 signal_handling_playback(struct worker* wrk)
 182 {
 183 #ifdef SIGHUP
 184         if(sig_record_reload) {
 185 # ifdef HAVE_SYSTEMD
 186                 sd_notify(0, "RELOADING=1");
 187 # endif
 188                 worker_sighandler(SIGHUP, wrk);
 189 # ifdef HAVE_SYSTEMD
 190                 sd_notify(0, "READY=1");
 191 # endif
 192         }
 193 #endif
 194         if(sig_record_quit)
 195                 worker_sighandler(SIGTERM, wrk);
 196         sig_record_quit = 0;
 197         sig_record_reload = 0;
 198 }
 199
 200 struct daemon*
 201 daemon_init(void)
 202 {
 203         struct daemon* daemon = (struct daemon*)calloc(1,
 204                 sizeof(struct daemon));
 205 #ifdef USE_WINSOCK
 206         int r;
 207         WSADATA wsa_data;
 208 #endif
 209         if(!daemon)
 210                 return NULL;
 211 #ifdef USE_WINSOCK
 212         r = WSAStartup(MAKEWORD(2,2), &wsa_data);
 213         if(r != 0) {
 214                 fatal_exit("could not init winsock. WSAStartup: %s",
 215                         wsa_strerror(r));
 216         }
 217 #endif /* USE_WINSOCK */
 218         signal_handling_record();
 219         checklock_start();
 220 #ifdef HAVE_SSL
 221 #  ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS
 222         ERR_load_crypto_strings();
 223 #  endif
 224         ERR_load_SSL_strings();
 225 #  ifdef USE_GOST
 226         (void)sldns_key_EVP_load_gost_id();
 227 #  endif
 228 #  if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_CRYPTO)
 229         OpenSSL_add_all_algorithms();
 230 #  else
 231         OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS
 232                 | OPENSSL_INIT_ADD_ALL_DIGESTS
 233                 | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 234 #  endif
 235 #  if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS
 236         /* grab the COMP method ptr because openssl leaks it */
 237         comp_meth = (void*)SSL_COMP_get_compression_methods();
 238 #  endif
 239 #  if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL)
 240         (void)SSL_library_init();
 241 #  else
 242         (void)OPENSSL_init_ssl(0, NULL);
 243 #  endif
 244 #  if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED)
 245         if(!ub_openssl_lock_init())
 246                 fatal_exit("could not init openssl locks");
 247 #  endif
 248 #elif defined(HAVE_NSS)
 249         if(NSS_NoDB_Init(NULL) != SECSuccess)
 250                 fatal_exit("could not init NSS");
 251 #endif /* HAVE_SSL or HAVE_NSS */
 252 #ifdef HAVE_TZSET
 253         /* init timezone info while we are not chrooted yet */
 254         tzset();
 255 #endif
 256         /* open /dev/random if needed */
 257         ub_systemseed((unsigned)time(NULL)^(unsigned)getpid()^0xe67);
 258         daemon->need_to_exit = 0;
 259         modstack_init(&daemon->mods);
 260         if(!(daemon->env = (struct module_env*)calloc(1,
 261                 sizeof(*daemon->env)))) {
 262                 free(daemon);
 263                 return NULL;
 264         }
 265         /* init edns_known_options */
 266         if(!edns_known_options_init(daemon->env)) {
 267                 free(daemon->env);
 268                 free(daemon);
 269                 return NULL;
 270         }
 271         alloc_init(&daemon->superalloc, NULL, 0);
 272         daemon->acl = acl_list_create();
 273         if(!daemon->acl) {
 274                 edns_known_options_delete(daemon->env);
 275                 free(daemon->env);
 276                 free(daemon);
 277                 return NULL;
 278         }
 279         if(gettimeofday(&daemon->time_boot, NULL) < 0)
 280                 log_err("gettimeofday: %s", strerror(errno));
 281         daemon->time_last_stat = daemon->time_boot;
 282         return daemon;
 283 }
 284
 285 int
 286 daemon_open_shared_ports(struct daemon* daemon)
 287 {
 288         log_assert(daemon);
 289         if(daemon->cfg->port != daemon->listening_port) {
 290                 size_t i;
 291                 struct listen_port* p0;
 292                 daemon->reuseport = 0;
 293                 /* free and close old ports */
 294                 if(daemon->ports != NULL) {
 295                         for(i=0; i<daemon->num_ports; i++)
 296                                 listening_ports_free(daemon->ports[i]);
 297                         free(daemon->ports);
 298                         daemon->ports = NULL;
 299                 }
 300                 /* see if we want to reuseport */
 301 #ifdef SO_REUSEPORT
 302                 if(daemon->cfg->so_reuseport && daemon->cfg->num_threads > 0)
 303                         daemon->reuseport = 1;
 304 #endif
 305                 /* try to use reuseport */
 306                 p0 = listening_ports_open(daemon->cfg, &daemon->reuseport);
 307                 if(!p0) {
 308                         listening_ports_free(p0);
 309                         return 0;
 310                 }
 311                 if(daemon->reuseport) {
 312                         /* reuseport was successful, allocate for it */
 313                         daemon->num_ports = (size_t)daemon->cfg->num_threads;
 314                 } else {
 315                         /* do the normal, singleportslist thing,
 316                          * reuseport not enabled or did not work */
 317                         daemon->num_ports = 1;
 318                 }
 319                 if(!(daemon->ports = (struct listen_port**)calloc(
 320                         daemon->num_ports, sizeof(*daemon->ports)))) {
 321                         listening_ports_free(p0);
 322                         return 0;
 323                 }
 324                 daemon->ports[0] = p0;
 325                 if(daemon->reuseport) {
 326                         /* continue to use reuseport */
 327                         for(i=1; i<daemon->num_ports; i++) {
 328                                 if(!(daemon->ports[i]=
 329                                         listening_ports_open(daemon->cfg,
 330                                                 &daemon->reuseport))
 331                                         || !daemon->reuseport ) {
 332                                         for(i=0; i<daemon->num_ports; i++)
 333                                                 listening_ports_free(daemon->ports[i]);
 334                                         free(daemon->ports);
 335                                         daemon->ports = NULL;
 336                                         return 0;
 337                                 }
 338                         }
 339                 }
 340                 daemon->listening_port = daemon->cfg->port;
 341         }
 342         if(!daemon->cfg->remote_control_enable && daemon->rc_port) {
 343                 listening_ports_free(daemon->rc_ports);
 344                 daemon->rc_ports = NULL;
 345                 daemon->rc_port = 0;
 346         }
 347         if(daemon->cfg->remote_control_enable &&
 348                 daemon->cfg->control_port != daemon->rc_port) {
 349                 listening_ports_free(daemon->rc_ports);
 350                 if(!(daemon->rc_ports=daemon_remote_open_ports(daemon->cfg)))
 351                         return 0;
 352                 daemon->rc_port = daemon->cfg->control_port;
 353         }
 354         return 1;
 355 }
 356
 357 /**
 358  * Setup modules. setup module stack.
 359  * @param daemon: the daemon
 360  */
 361 static void daemon_setup_modules(struct daemon* daemon)
 362 {
 363         daemon->env->cfg = daemon->cfg;
 364         daemon->env->alloc = &daemon->superalloc;
 365         daemon->env->worker = NULL;
 366         daemon->env->need_to_validate = 0; /* set by module init below */
 367         if(!modstack_setup(&daemon->mods, daemon->cfg->module_conf,
 368                 daemon->env)) {
 369                 fatal_exit("failed to setup modules");
 370         }
 371         log_edns_known_options(VERB_ALGO, daemon->env);
 372 }
 373
 374 /**
 375  * Obtain allowed port numbers, concatenate the list, and shuffle them
 376  * (ready to be handed out to threads).
 377  * @param daemon: the daemon. Uses rand and cfg.
 378  * @param shufport: the portlist output.
 379  * @return number of ports available.
 380  */
 381 static int daemon_get_shufport(struct daemon* daemon, int* shufport)
 382 {
 383         int i, n, k, temp;
 384         int avail = 0;
 385         for(i=0; i<65536; i++) {
 386                 if(daemon->cfg->outgoing_avail_ports[i]) {
 387                         shufport[avail++] = daemon->cfg->
 388                                 outgoing_avail_ports[i];
 389                 }
 390         }
 391         if(avail == 0)
 392                 fatal_exit("no ports are permitted for UDP, add "
 393                         "with outgoing-port-permit");
 394         /* Knuth shuffle */
 395         n = avail;
 396         while(--n > 0) {
 397                 k = ub_random_max(daemon->rand, n+1); /* 0<= k<= n */
 398                 temp = shufport[k];
 399                 shufport[k] = shufport[n];
 400                 shufport[n] = temp;
 401         }
 402         return avail;
 403 }
 404
 405 /**
 406  * Allocate empty worker structures. With backptr and thread-number,
 407  * from 0..numthread initialised. Used as user arguments to new threads.
 408  * Creates the daemon random generator if it does not exist yet.
 409  * The random generator stays existing between reloads with a unique state.
 410  * @param daemon: the daemon with (new) config settings.
 411  */
 412 static void
 413 daemon_create_workers(struct daemon* daemon)
 414 {
 415         int i, numport;
 416         int* shufport;
 417         log_assert(daemon && daemon->cfg);
 418         if(!daemon->rand) {
 419                 unsigned int seed = (unsigned int)time(NULL) ^
 420                         (unsigned int)getpid() ^ 0x438;
 421                 daemon->rand = ub_initstate(seed, NULL);
 422                 if(!daemon->rand)
 423                         fatal_exit("could not init random generator");
 424         }
 425         hash_set_raninit((uint32_t)ub_random(daemon->rand));
 426         shufport = (int*)calloc(65536, sizeof(int));
 427         if(!shufport)
 428                 fatal_exit("out of memory during daemon init");
 429         numport = daemon_get_shufport(daemon, shufport);
 430         verbose(VERB_ALGO, "total of %d outgoing ports available", numport);
 431
 432         daemon->num = (daemon->cfg->num_threads?daemon->cfg->num_threads:1);
 433         if(daemon->reuseport && (int)daemon->num < (int)daemon->num_ports) {
 434                 log_warn("cannot reduce num-threads to %d because so-reuseport "
 435                         "so continuing with %d threads.", (int)daemon->num,
 436                         (int)daemon->num_ports);
 437                 daemon->num = (int)daemon->num_ports;
 438         }
 439         daemon->workers = (struct worker**)calloc((size_t)daemon->num,
 440                 sizeof(struct worker*));
 441         if(!daemon->workers)
 442                 fatal_exit("out of memory during daemon init");
 443         if(daemon->cfg->dnstap) {
 444 #ifdef USE_DNSTAP
 445                 daemon->dtenv = dt_create(daemon->cfg->dnstap_socket_path,
 446                         (unsigned int)daemon->num);
 447                 if (!daemon->dtenv)
 448                         fatal_exit("dt_create failed");
 449                 dt_apply_cfg(daemon->dtenv, daemon->cfg);
 450 #else
 451                 fatal_exit("dnstap enabled in config but not built with dnstap support");
 452 #endif
 453         }
 454         for(i=0; i<daemon->num; i++) {
 455                 if(!(daemon->workers[i] = worker_create(daemon, i,
 456                         shufport+numport*i/daemon->num,
 457                         numport*(i+1)/daemon->num - numport*i/daemon->num)))
 458                         /* the above is not ports/numthr, due to rounding */
 459                         fatal_exit("could not create worker");
 460         }
 461         free(shufport);
 462 }
 463
 464 #ifdef THREADS_DISABLED
 465 /**
 466  * Close all pipes except for the numbered thread.
 467  * @param daemon: daemon to close pipes in.
 468  * @param thr: thread number 0..num-1 of thread to skip.
 469  */
 470 static void close_other_pipes(struct daemon* daemon, int thr)
 471 {
 472         int i;
 473         for(i=0; i<daemon->num; i++)
 474                 if(i!=thr) {
 475                         if(i==0) {
 476                                 /* only close read part, need to write stats */
 477                                 tube_close_read(daemon->workers[i]->cmd);
 478                         } else {
 479                                 /* complete close channel to others */
 480                                 tube_delete(daemon->workers[i]->cmd);
 481                                 daemon->workers[i]->cmd = NULL;
 482                         }
 483                 }
 484 }
 485 #endif /* THREADS_DISABLED */
 486
 487 /**
 488  * Function to start one thread.
 489  * @param arg: user argument.
 490  * @return: void* user return value could be used for thread_join results.
 491  */
 492 static void*
 493 thread_start(void* arg)
 494 {
 495         struct worker* worker = (struct worker*)arg;
 496         int port_num = 0;
 497         log_thread_set(&worker->thread_num);
 498         ub_thread_blocksigs();
 499 #ifdef THREADS_DISABLED
 500         /* close pipe ends used by main */
 501         tube_close_write(worker->cmd);
 502         close_other_pipes(worker->daemon, worker->thread_num);
 503 #endif
 504 #ifdef SO_REUSEPORT
 505         if(worker->daemon->cfg->so_reuseport)
 506                 port_num = worker->thread_num % worker->daemon->num_ports;
 507         else
 508                 port_num = 0;
 509 #endif
 510         if(!worker_init(worker, worker->daemon->cfg,
 511                         worker->daemon->ports[port_num], 0))
 512                 fatal_exit("Could not initialize thread");
 513
 514         worker_work(worker);
 515         return NULL;
 516 }
 517
 518 /**
 519  * Fork and init the other threads. Main thread returns for special handling.
 520  * @param daemon: the daemon with other threads to fork.
 521  */
 522 static void
 523 daemon_start_others(struct daemon* daemon)
 524 {
 525         int i;
 526         log_assert(daemon);
 527         verbose(VERB_ALGO, "start threads");
 528         /* skip i=0, is this thread */
 529         for(i=1; i<daemon->num; i++) {
 530                 ub_thread_create(&daemon->workers[i]->thr_id,
 531                         thread_start, daemon->workers[i]);
 532 #ifdef THREADS_DISABLED
 533                 /* close pipe end of child */
 534                 tube_close_read(daemon->workers[i]->cmd);
 535 #endif /* no threads */
 536         }
 537 }
 538
 539 /**
 540  * Stop the other threads.
 541  * @param daemon: the daemon with other threads.
 542  */
 543 static void
 544 daemon_stop_others(struct daemon* daemon)
 545 {
 546         int i;
 547         log_assert(daemon);
 548         verbose(VERB_ALGO, "stop threads");
 549         /* skip i=0, is this thread */
 550         /* use i=0 buffer for sending cmds; because we are #0 */
 551         for(i=1; i<daemon->num; i++) {
 552                 worker_send_cmd(daemon->workers[i], worker_cmd_quit);
 553         }
 554         /* wait for them to quit */
 555         for(i=1; i<daemon->num; i++) {
 556                 /* join it to make sure its dead */
 557                 verbose(VERB_ALGO, "join %d", i);
 558                 ub_thread_join(daemon->workers[i]->thr_id);
 559                 verbose(VERB_ALGO, "join success %d", i);
 560         }
 561 }
 562
 563 void
 564 daemon_fork(struct daemon* daemon)
 565 {
 566         int have_view_respip_cfg = 0;
 567
 568         log_assert(daemon);
 569         if(!(daemon->views = views_create()))
 570                 fatal_exit("Could not create views: out of memory");
 571         /* create individual views and their localzone/data trees */
 572         if(!views_apply_cfg(daemon->views, daemon->cfg))
 573                 fatal_exit("Could not set up views");
 574
 575         if(!acl_list_apply_cfg(daemon->acl, daemon->cfg, daemon->views))
 576                 fatal_exit("Could not setup access control list");
 577         if(daemon->cfg->dnscrypt) {
 578 #ifdef USE_DNSCRYPT
 579                 daemon->dnscenv = dnsc_create();
 580                 if (!daemon->dnscenv)
 581                         fatal_exit("dnsc_create failed");
 582                 dnsc_apply_cfg(daemon->dnscenv, daemon->cfg);
 583 #else
 584                 fatal_exit("dnscrypt enabled in config but unbound was not built with "
 585                                    "dnscrypt support");
 586 #endif
 587         }
 588         /* create global local_zones */
 589         if(!(daemon->local_zones = local_zones_create()))
 590                 fatal_exit("Could not create local zones: out of memory");
 591         if(!local_zones_apply_cfg(daemon->local_zones, daemon->cfg))
 592                 fatal_exit("Could not set up local zones");
 593
 594         /* process raw response-ip configuration data */
 595         if(!(daemon->respip_set = respip_set_create()))
 596                 fatal_exit("Could not create response IP set");
 597         if(!respip_global_apply_cfg(daemon->respip_set, daemon->cfg))
 598                 fatal_exit("Could not set up response IP set");
 599         if(!respip_views_apply_cfg(daemon->views, daemon->cfg,
 600                 &have_view_respip_cfg))
 601                 fatal_exit("Could not set up per-view response IP sets");
 602         daemon->use_response_ip = !respip_set_is_empty(daemon->respip_set) ||
 603                 have_view_respip_cfg;
 604
 605         /* setup modules */
 606         daemon_setup_modules(daemon);
 607
 608         /* response-ip-xxx options don't work as expected without the respip
 609          * module.  To avoid run-time operational surprise we reject such
 610          * configuration. */
 611         if(daemon->use_response_ip &&
 612                 modstack_find(&daemon->mods, "respip") < 0)
 613                 fatal_exit("response-ip options require respip module");
 614
 615         /* first create all the worker structures, so we can pass
 616          * them to the newly created threads.
 617          */
 618         daemon_create_workers(daemon);
 619
 620 #if defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)
 621         /* in libev the first inited base gets signals */
 622         if(!worker_init(daemon->workers[0], daemon->cfg, daemon->ports[0], 1))
 623                 fatal_exit("Could not initialize main thread");
 624 #endif
 625
 626         /* Now create the threads and init the workers.
 627          * By the way, this is thread #0 (the main thread).
 628          */
 629         daemon_start_others(daemon);
 630
 631         /* Special handling for the main thread. This is the thread
 632          * that handles signals and remote control.
 633          */
 634 #if !(defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP))
 635         /* libevent has the last inited base get signals (or any base) */
 636         if(!worker_init(daemon->workers[0], daemon->cfg, daemon->ports[0], 1))
 637                 fatal_exit("Could not initialize main thread");
 638 #endif
 639         signal_handling_playback(daemon->workers[0]);
 640
 641         if (!shm_main_init(daemon))
 642                 log_warn("SHM has failed");
 643
 644         /* Start resolver service on main thread. */
 645 #ifdef HAVE_SYSTEMD
 646         sd_notify(0, "READY=1");
 647 #endif
 648         log_info("start of service (%s).", PACKAGE_STRING);
 649         worker_work(daemon->workers[0]);
 650 #ifdef HAVE_SYSTEMD
 651         sd_notify(0, "STOPPING=1");
 652 #endif
 653         log_info("service stopped (%s).", PACKAGE_STRING);
 654
 655         /* we exited! a signal happened! Stop other threads */
 656         daemon_stop_others(daemon);
 657
 658         /* Shutdown SHM */
 659         shm_main_shutdown(daemon);
 660
 661         daemon->need_to_exit = daemon->workers[0]->need_to_exit;
 662 }
 663
 664 void
 665 daemon_cleanup(struct daemon* daemon)
 666 {
 667         int i;
 668         log_assert(daemon);
 669         /* before stopping main worker, handle signals ourselves, so we
 670            don't die on multiple reload signals for example. */
 671         signal_handling_record();
 672         log_thread_set(NULL);
 673         /* clean up caches because
 674          * a) RRset IDs will be recycled after a reload, causing collisions
 675          * b) validation config can change, thus rrset, msg, keycache clear */
 676         slabhash_clear(&daemon->env->rrset_cache->table);
 677         slabhash_clear(daemon->env->msg_cache);
 678         local_zones_delete(daemon->local_zones);
 679         daemon->local_zones = NULL;
 680         respip_set_delete(daemon->respip_set);
 681         daemon->respip_set = NULL;
 682         views_delete(daemon->views);
 683         daemon->views = NULL;
 684         /* key cache is cleared by module desetup during next daemon_fork() */
 685         daemon_remote_clear(daemon->rc);
 686         for(i=0; i<daemon->num; i++)
 687                 worker_delete(daemon->workers[i]);
 688         free(daemon->workers);
 689         daemon->workers = NULL;
 690         daemon->num = 0;
 691 #ifdef USE_DNSTAP
 692         dt_delete(daemon->dtenv);
 693 #endif
 694         daemon->cfg = NULL;
 695 }
 696
 697 void
 698 daemon_delete(struct daemon* daemon)
 699 {
 700         size_t i;
 701         if(!daemon)
 702                 return;
 703         modstack_desetup(&daemon->mods, daemon->env);
 704         daemon_remote_delete(daemon->rc);
 705         for(i = 0; i < daemon->num_ports; i++)
 706                 listening_ports_free(daemon->ports[i]);
 707         free(daemon->ports);
 708         listening_ports_free(daemon->rc_ports);
 709         if(daemon->env) {
 710                 slabhash_delete(daemon->env->msg_cache);
 711                 rrset_cache_delete(daemon->env->rrset_cache);
 712                 infra_delete(daemon->env->infra_cache);
 713                 edns_known_options_delete(daemon->env);
 714         }
 715         ub_randfree(daemon->rand);
 716         alloc_clear(&daemon->superalloc);
 717         acl_list_delete(daemon->acl);
 718         free(daemon->chroot);
 719         free(daemon->pidfile);
 720         free(daemon->env);
 721 #ifdef HAVE_SSL
 722         SSL_CTX_free((SSL_CTX*)daemon->listen_sslctx);
 723         SSL_CTX_free((SSL_CTX*)daemon->connect_sslctx);
 724 #endif
 725         free(daemon);
 726 #ifdef LEX_HAS_YYLEX_DESTROY
 727         /* lex cleanup */
 728         ub_c_lex_destroy();
 729 #endif
 730         /* libcrypto cleanup */
 731 #ifdef HAVE_SSL
 732 #  if defined(USE_GOST) && defined(HAVE_LDNS_KEY_EVP_UNLOAD_GOST)
 733         sldns_key_EVP_unload_gost();
 734 #  endif
 735 #  if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS && HAVE_DECL_SK_SSL_COMP_POP_FREE
 736 #    ifndef S_SPLINT_S
 737 #      if OPENSSL_VERSION_NUMBER < 0x10100000
 738         sk_SSL_COMP_pop_free(comp_meth, (void(*)())CRYPTO_free);
 739 #      endif
 740 #    endif
 741 #  endif
 742 #  ifdef HAVE_OPENSSL_CONFIG
 743         EVP_cleanup();
 744 #  if OPENSSL_VERSION_NUMBER < 0x10100000
 745         ENGINE_cleanup();
 746 #  endif
 747         CONF_modules_free();
 748 #  endif
 749 #  ifdef HAVE_CRYPTO_CLEANUP_ALL_EX_DATA
 750         CRYPTO_cleanup_all_ex_data(); /* safe, no more threads right now */
 751 #  endif
 752 #  ifdef HAVE_ERR_FREE_STRINGS
 753         ERR_free_strings();
 754 #  endif
 755 #  if OPENSSL_VERSION_NUMBER < 0x10100000
 756         RAND_cleanup();
 757 #  endif
 758 #  if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED)
 759         ub_openssl_lock_delete();
 760 #  endif
 761 #elif defined(HAVE_NSS)
 762         NSS_Shutdown();
 763 #endif /* HAVE_SSL or HAVE_NSS */
 764         checklock_stop();
 765 #ifdef USE_WINSOCK
 766         if(WSACleanup() != 0) {
 767                 log_err("Could not WSACleanup: %s",
 768                         wsa_strerror(WSAGetLastError()));
 769         }
 770 #endif
 771 }
 772
 773 void daemon_apply_cfg(struct daemon* daemon, struct config_file* cfg)
 774 {
 775         daemon->cfg = cfg;
 776         config_apply(cfg);
 777         if(!daemon->env->msg_cache ||
 778            cfg->msg_cache_size != slabhash_get_size(daemon->env->msg_cache) ||
 779            cfg->msg_cache_slabs != daemon->env->msg_cache->size) {
 780                 slabhash_delete(daemon->env->msg_cache);
 781                 daemon->env->msg_cache = slabhash_create(cfg->msg_cache_slabs,
 782                         HASH_DEFAULT_STARTARRAY, cfg->msg_cache_size,
 783                         msgreply_sizefunc, query_info_compare,
 784                         query_entry_delete, reply_info_delete, NULL);
 785                 if(!daemon->env->msg_cache) {
 786                         fatal_exit("malloc failure updating config settings");
 787                 }
 788         }
 789         if((daemon->env->rrset_cache = rrset_cache_adjust(
 790                 daemon->env->rrset_cache, cfg, &daemon->superalloc)) == 0)
 791                 fatal_exit("malloc failure updating config settings");
 792         if((daemon->env->infra_cache = infra_adjust(daemon->env->infra_cache,
 793                 cfg))==0)
 794                 fatal_exit("malloc failure updating config settings");
 795 }