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 "services/authzone.h"
  86 #include "util/module.h"
  87 #include "util/random.h"
  88 #include "util/tube.h"
  89 #include "util/net_help.h"
  90 #include "sldns/keyraw.h"
  91 #include "respip/respip.h"
  92 #include <signal.h>
  93
  94 #ifdef HAVE_SYSTEMD
  95 #include <systemd/sd-daemon.h>
  96 #endif
  97
  98 /** How many quit requests happened. */
  99 static int sig_record_quit = 0;
 100 /** How many reload requests happened. */
 101 static int sig_record_reload = 0;
 102
 103 #if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS
 104 /** cleaner ssl memory freeup */
 105 static void* comp_meth = NULL;
 106 #endif
 107 #ifdef LEX_HAS_YYLEX_DESTROY
 108 /** remove buffers for parsing and init */
 109 int ub_c_lex_destroy(void);
 110 #endif
 111
 112 /** used when no other sighandling happens, so we don't die
 113   * when multiple signals in quick succession are sent to us.
 114   * @param sig: signal number.
 115   * @return signal handler return type (void or int).
 116   */
 117 static RETSIGTYPE record_sigh(int sig)
 118 {
 119 #ifdef LIBEVENT_SIGNAL_PROBLEM
 120         /* cannot log, verbose here because locks may be held */
 121         /* quit on signal, no cleanup and statistics,
 122            because installed libevent version is not threadsafe */
 123         exit(0);
 124 #endif
 125         switch(sig)
 126         {
 127                 case SIGTERM:
 128 #ifdef SIGQUIT
 129                 case SIGQUIT:
 130 #endif
 131 #ifdef SIGBREAK
 132                 case SIGBREAK:
 133 #endif
 134                 case SIGINT:
 135                         sig_record_quit++;
 136                         break;
 137 #ifdef SIGHUP
 138                 case SIGHUP:
 139                         sig_record_reload++;
 140                         break;
 141 #endif
 142 #ifdef SIGPIPE
 143                 case SIGPIPE:
 144                         break;
 145 #endif
 146                 default:
 147                         /* ignoring signal */
 148                         break;
 149         }
 150 }
 151
 152 /**
 153  * Signal handling during the time when netevent is disabled.
 154  * Stores signals to replay later.
 155  */
 156 static void
 157 signal_handling_record(void)
 158 {
 159         if( signal(SIGTERM, record_sigh) == SIG_ERR ||
 160 #ifdef SIGQUIT
 161                 signal(SIGQUIT, record_sigh) == SIG_ERR ||
 162 #endif
 163 #ifdef SIGBREAK
 164                 signal(SIGBREAK, record_sigh) == SIG_ERR ||
 165 #endif
 166 #ifdef SIGHUP
 167                 signal(SIGHUP, record_sigh) == SIG_ERR ||
 168 #endif
 169 #ifdef SIGPIPE
 170                 signal(SIGPIPE, SIG_IGN) == SIG_ERR ||
 171 #endif
 172                 signal(SIGINT, record_sigh) == SIG_ERR
 173                 )
 174                 log_err("install sighandler: %s", strerror(errno));
 175 }
 176
 177 /**
 178  * Replay old signals.
 179  * @param wrk: worker that handles signals.
 180  */
 181 static void
 182 signal_handling_playback(struct worker* wrk)
 183 {
 184 #ifdef SIGHUP
 185         if(sig_record_reload) {
 186 # ifdef HAVE_SYSTEMD
 187                 sd_notify(0, "RELOADING=1");
 188 # endif
 189                 worker_sighandler(SIGHUP, wrk);
 190 # ifdef HAVE_SYSTEMD
 191                 sd_notify(0, "READY=1");
 192 # endif
 193         }
 194 #endif
 195         if(sig_record_quit)
 196                 worker_sighandler(SIGTERM, wrk);
 197         sig_record_quit = 0;
 198         sig_record_reload = 0;
 199 }
 200
 201 struct daemon*
 202 daemon_init(void)
 203 {
 204         struct daemon* daemon = (struct daemon*)calloc(1,
 205                 sizeof(struct daemon));
 206 #ifdef USE_WINSOCK
 207         int r;
 208         WSADATA wsa_data;
 209 #endif
 210         if(!daemon)
 211                 return NULL;
 212 #ifdef USE_WINSOCK
 213         r = WSAStartup(MAKEWORD(2,2), &wsa_data);
 214         if(r != 0) {
 215                 fatal_exit("could not init winsock. WSAStartup: %s",
 216                         wsa_strerror(r));
 217         }
 218 #endif /* USE_WINSOCK */
 219         signal_handling_record();
 220         checklock_start();
 221 #ifdef HAVE_SSL
 222 #  ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS
 223         ERR_load_crypto_strings();
 224 #  endif
 225 #if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL)
 226         ERR_load_SSL_strings();
 227 #endif
 228 #  ifdef USE_GOST
 229         (void)sldns_key_EVP_load_gost_id();
 230 #  endif
 231 #  if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_CRYPTO)
 232         OpenSSL_add_all_algorithms();
 233 #  else
 234         OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS
 235                 | OPENSSL_INIT_ADD_ALL_DIGESTS
 236                 | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 237 #  endif
 238 #  if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS
 239         /* grab the COMP method ptr because openssl leaks it */
 240         comp_meth = (void*)SSL_COMP_get_compression_methods();
 241 #  endif
 242 #  if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL)
 243         (void)SSL_library_init();
 244 #  else
 245         (void)OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL);
 246 #  endif
 247 #  if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED)
 248         if(!ub_openssl_lock_init())
 249                 fatal_exit("could not init openssl locks");
 250 #  endif
 251 #elif defined(HAVE_NSS)
 252         if(NSS_NoDB_Init(NULL) != SECSuccess)
 253                 fatal_exit("could not init NSS");
 254 #endif /* HAVE_SSL or HAVE_NSS */
 255 #ifdef HAVE_TZSET
 256         /* init timezone info while we are not chrooted yet */
 257         tzset();
 258 #endif
 259         /* open /dev/random if needed */
 260         ub_systemseed((unsigned)time(NULL)^(unsigned)getpid()^0xe67);
 261         daemon->need_to_exit = 0;
 262         modstack_init(&daemon->mods);
 263         if(!(daemon->env = (struct module_env*)calloc(1,
 264                 sizeof(*daemon->env)))) {
 265                 free(daemon);
 266                 return NULL;
 267         }
 268         /* init edns_known_options */
 269         if(!edns_known_options_init(daemon->env)) {
 270                 free(daemon->env);
 271                 free(daemon);
 272                 return NULL;
 273         }
 274         alloc_init(&daemon->superalloc, NULL, 0);
 275         daemon->acl = acl_list_create();
 276         if(!daemon->acl) {
 277                 edns_known_options_delete(daemon->env);
 278                 free(daemon->env);
 279                 free(daemon);
 280                 return NULL;
 281         }
 282         if(gettimeofday(&daemon->time_boot, NULL) < 0)
 283                 log_err("gettimeofday: %s", strerror(errno));
 284         daemon->time_last_stat = daemon->time_boot;
 285         if((daemon->env->auth_zones = auth_zones_create()) == 0) {
 286                 acl_list_delete(daemon->acl);
 287                 edns_known_options_delete(daemon->env);
 288                 free(daemon->env);
 289                 free(daemon);
 290                 return NULL;
 291         }
 292         return daemon;
 293 }
 294
 295 int
 296 daemon_open_shared_ports(struct daemon* daemon)
 297 {
 298         log_assert(daemon);
 299         if(daemon->cfg->port != daemon->listening_port) {
 300                 size_t i;
 301                 struct listen_port* p0;
 302                 daemon->reuseport = 0;
 303                 /* free and close old ports */
 304                 if(daemon->ports != NULL) {
 305                         for(i=0; i<daemon->num_ports; i++)
 306                                 listening_ports_free(daemon->ports[i]);
 307                         free(daemon->ports);
 308                         daemon->ports = NULL;
 309                 }
 310                 /* see if we want to reuseport */
 311 #ifdef SO_REUSEPORT
 312                 if(daemon->cfg->so_reuseport && daemon->cfg->num_threads > 0)
 313                         daemon->reuseport = 1;
 314 #endif
 315                 /* try to use reuseport */
 316                 p0 = listening_ports_open(daemon->cfg, &daemon->reuseport);
 317                 if(!p0) {
 318                         listening_ports_free(p0);
 319                         return 0;
 320                 }
 321                 if(daemon->reuseport) {
 322                         /* reuseport was successful, allocate for it */
 323                         daemon->num_ports = (size_t)daemon->cfg->num_threads;
 324                 } else {
 325                         /* do the normal, singleportslist thing,
 326                          * reuseport not enabled or did not work */
 327                         daemon->num_ports = 1;
 328                 }
 329                 if(!(daemon->ports = (struct listen_port**)calloc(
 330                         daemon->num_ports, sizeof(*daemon->ports)))) {
 331                         listening_ports_free(p0);
 332                         return 0;
 333                 }
 334                 daemon->ports[0] = p0;
 335                 if(daemon->reuseport) {
 336                         /* continue to use reuseport */
 337                         for(i=1; i<daemon->num_ports; i++) {
 338                                 if(!(daemon->ports[i]=
 339                                         listening_ports_open(daemon->cfg,
 340                                                 &daemon->reuseport))
 341                                         || !daemon->reuseport ) {
 342                                         for(i=0; i<daemon->num_ports; i++)
 343                                                 listening_ports_free(daemon->ports[i]);
 344                                         free(daemon->ports);
 345                                         daemon->ports = NULL;
 346                                         return 0;
 347                                 }
 348                         }
 349                 }
 350                 daemon->listening_port = daemon->cfg->port;
 351         }
 352         if(!daemon->cfg->remote_control_enable && daemon->rc_port) {
 353                 listening_ports_free(daemon->rc_ports);
 354                 daemon->rc_ports = NULL;
 355                 daemon->rc_port = 0;
 356         }
 357         if(daemon->cfg->remote_control_enable &&
 358                 daemon->cfg->control_port != daemon->rc_port) {
 359                 listening_ports_free(daemon->rc_ports);
 360                 if(!(daemon->rc_ports=daemon_remote_open_ports(daemon->cfg)))
 361                         return 0;
 362                 daemon->rc_port = daemon->cfg->control_port;
 363         }
 364         return 1;
 365 }
 366
 367 /**
 368  * Setup modules. setup module stack.
 369  * @param daemon: the daemon
 370  */
 371 static void daemon_setup_modules(struct daemon* daemon)
 372 {
 373         daemon->env->cfg = daemon->cfg;
 374         daemon->env->alloc = &daemon->superalloc;
 375         daemon->env->worker = NULL;
 376         daemon->env->need_to_validate = 0; /* set by module init below */
 377         if(!modstack_setup(&daemon->mods, daemon->cfg->module_conf,
 378                 daemon->env)) {
 379                 fatal_exit("failed to setup modules");
 380         }
 381         log_edns_known_options(VERB_ALGO, daemon->env);
 382 }
 383
 384 /**
 385  * Obtain allowed port numbers, concatenate the list, and shuffle them
 386  * (ready to be handed out to threads).
 387  * @param daemon: the daemon. Uses rand and cfg.
 388  * @param shufport: the portlist output.
 389  * @return number of ports available.
 390  */
 391 static int daemon_get_shufport(struct daemon* daemon, int* shufport)
 392 {
 393         int i, n, k, temp;
 394         int avail = 0;
 395         for(i=0; i<65536; i++) {
 396                 if(daemon->cfg->outgoing_avail_ports[i]) {
 397                         shufport[avail++] = daemon->cfg->
 398                                 outgoing_avail_ports[i];
 399                 }
 400         }
 401         if(avail == 0)
 402                 fatal_exit("no ports are permitted for UDP, add "
 403                         "with outgoing-port-permit");
 404         /* Knuth shuffle */
 405         n = avail;
 406         while(--n > 0) {
 407                 k = ub_random_max(daemon->rand, n+1); /* 0<= k<= n */
 408                 temp = shufport[k];
 409                 shufport[k] = shufport[n];
 410                 shufport[n] = temp;
 411         }
 412         return avail;
 413 }
 414
 415 /**
 416  * Allocate empty worker structures. With backptr and thread-number,
 417  * from 0..numthread initialised. Used as user arguments to new threads.
 418  * Creates the daemon random generator if it does not exist yet.
 419  * The random generator stays existing between reloads with a unique state.
 420  * @param daemon: the daemon with (new) config settings.
 421  */
 422 static void
 423 daemon_create_workers(struct daemon* daemon)
 424 {
 425         int i, numport;
 426         int* shufport;
 427         log_assert(daemon && daemon->cfg);
 428         if(!daemon->rand) {
 429                 unsigned int seed = (unsigned int)time(NULL) ^
 430                         (unsigned int)getpid() ^ 0x438;
 431                 daemon->rand = ub_initstate(seed, NULL);
 432                 if(!daemon->rand)
 433                         fatal_exit("could not init random generator");
 434                 hash_set_raninit((uint32_t)ub_random(daemon->rand));
 435         }
 436         shufport = (int*)calloc(65536, sizeof(int));
 437         if(!shufport)
 438                 fatal_exit("out of memory during daemon init");
 439         numport = daemon_get_shufport(daemon, shufport);
 440         verbose(VERB_ALGO, "total of %d outgoing ports available", numport);
 441
 442         daemon->num = (daemon->cfg->num_threads?daemon->cfg->num_threads:1);
 443         if(daemon->reuseport && (int)daemon->num < (int)daemon->num_ports) {
 444                 log_warn("cannot reduce num-threads to %d because so-reuseport "
 445                         "so continuing with %d threads.", (int)daemon->num,
 446                         (int)daemon->num_ports);
 447                 daemon->num = (int)daemon->num_ports;
 448         }
 449         daemon->workers = (struct worker**)calloc((size_t)daemon->num,
 450                 sizeof(struct worker*));
 451         if(!daemon->workers)
 452                 fatal_exit("out of memory during daemon init");
 453         if(daemon->cfg->dnstap) {
 454 #ifdef USE_DNSTAP
 455                 daemon->dtenv = dt_create(daemon->cfg->dnstap_socket_path,
 456                         (unsigned int)daemon->num);
 457                 if (!daemon->dtenv)
 458                         fatal_exit("dt_create failed");
 459                 dt_apply_cfg(daemon->dtenv, daemon->cfg);
 460 #else
 461                 fatal_exit("dnstap enabled in config but not built with dnstap support");
 462 #endif
 463         }
 464         for(i=0; i<daemon->num; i++) {
 465                 if(!(daemon->workers[i] = worker_create(daemon, i,
 466                         shufport+numport*i/daemon->num,
 467                         numport*(i+1)/daemon->num - numport*i/daemon->num)))
 468                         /* the above is not ports/numthr, due to rounding */
 469                         fatal_exit("could not create worker");
 470         }
 471         free(shufport);
 472 }
 473
 474 #ifdef THREADS_DISABLED
 475 /**
 476  * Close all pipes except for the numbered thread.
 477  * @param daemon: daemon to close pipes in.
 478  * @param thr: thread number 0..num-1 of thread to skip.
 479  */
 480 static void close_other_pipes(struct daemon* daemon, int thr)
 481 {
 482         int i;
 483         for(i=0; i<daemon->num; i++)
 484                 if(i!=thr) {
 485                         if(i==0) {
 486                                 /* only close read part, need to write stats */
 487                                 tube_close_read(daemon->workers[i]->cmd);
 488                         } else {
 489                                 /* complete close channel to others */
 490                                 tube_delete(daemon->workers[i]->cmd);
 491                                 daemon->workers[i]->cmd = NULL;
 492                         }
 493                 }
 494 }
 495 #endif /* THREADS_DISABLED */
 496
 497 /**
 498  * Function to start one thread.
 499  * @param arg: user argument.
 500  * @return: void* user return value could be used for thread_join results.
 501  */
 502 static void*
 503 thread_start(void* arg)
 504 {
 505         struct worker* worker = (struct worker*)arg;
 506         int port_num = 0;
 507         log_thread_set(&worker->thread_num);
 508         ub_thread_blocksigs();
 509 #ifdef THREADS_DISABLED
 510         /* close pipe ends used by main */
 511         tube_close_write(worker->cmd);
 512         close_other_pipes(worker->daemon, worker->thread_num);
 513 #endif
 514 #ifdef SO_REUSEPORT
 515         if(worker->daemon->cfg->so_reuseport)
 516                 port_num = worker->thread_num % worker->daemon->num_ports;
 517         else
 518                 port_num = 0;
 519 #endif
 520         if(!worker_init(worker, worker->daemon->cfg,
 521                         worker->daemon->ports[port_num], 0))
 522                 fatal_exit("Could not initialize thread");
 523
 524         worker_work(worker);
 525         return NULL;
 526 }
 527
 528 /**
 529  * Fork and init the other threads. Main thread returns for special handling.
 530  * @param daemon: the daemon with other threads to fork.
 531  */
 532 static void
 533 daemon_start_others(struct daemon* daemon)
 534 {
 535         int i;
 536         log_assert(daemon);
 537         verbose(VERB_ALGO, "start threads");
 538         /* skip i=0, is this thread */
 539         for(i=1; i<daemon->num; i++) {
 540                 ub_thread_create(&daemon->workers[i]->thr_id,
 541                         thread_start, daemon->workers[i]);
 542 #ifdef THREADS_DISABLED
 543                 /* close pipe end of child */
 544                 tube_close_read(daemon->workers[i]->cmd);
 545 #endif /* no threads */
 546         }
 547 }
 548
 549 /**
 550  * Stop the other threads.
 551  * @param daemon: the daemon with other threads.
 552  */
 553 static void
 554 daemon_stop_others(struct daemon* daemon)
 555 {
 556         int i;
 557         log_assert(daemon);
 558         verbose(VERB_ALGO, "stop threads");
 559         /* skip i=0, is this thread */
 560         /* use i=0 buffer for sending cmds; because we are #0 */
 561         for(i=1; i<daemon->num; i++) {
 562                 worker_send_cmd(daemon->workers[i], worker_cmd_quit);
 563         }
 564         /* wait for them to quit */
 565         for(i=1; i<daemon->num; i++) {
 566                 /* join it to make sure its dead */
 567                 verbose(VERB_ALGO, "join %d", i);
 568                 ub_thread_join(daemon->workers[i]->thr_id);
 569                 verbose(VERB_ALGO, "join success %d", i);
 570         }
 571 }
 572
 573 void
 574 daemon_fork(struct daemon* daemon)
 575 {
 576         int have_view_respip_cfg = 0;
 577
 578         log_assert(daemon);
 579         if(!(daemon->views = views_create()))
 580                 fatal_exit("Could not create views: out of memory");
 581         /* create individual views and their localzone/data trees */
 582         if(!views_apply_cfg(daemon->views, daemon->cfg))
 583                 fatal_exit("Could not set up views");
 584
 585         if(!acl_list_apply_cfg(daemon->acl, daemon->cfg, daemon->views))
 586                 fatal_exit("Could not setup access control list");
 587         if(daemon->cfg->dnscrypt) {
 588 #ifdef USE_DNSCRYPT
 589                 daemon->dnscenv = dnsc_create();
 590                 if (!daemon->dnscenv)
 591                         fatal_exit("dnsc_create failed");
 592                 dnsc_apply_cfg(daemon->dnscenv, daemon->cfg);
 593 #else
 594                 fatal_exit("dnscrypt enabled in config but unbound was not built with "
 595                                    "dnscrypt support");
 596 #endif
 597         }
 598         /* create global local_zones */
 599         if(!(daemon->local_zones = local_zones_create()))
 600                 fatal_exit("Could not create local zones: out of memory");
 601         if(!local_zones_apply_cfg(daemon->local_zones, daemon->cfg))
 602                 fatal_exit("Could not set up local zones");
 603
 604         /* process raw response-ip configuration data */
 605         if(!(daemon->respip_set = respip_set_create()))
 606                 fatal_exit("Could not create response IP set");
 607         if(!respip_global_apply_cfg(daemon->respip_set, daemon->cfg))
 608                 fatal_exit("Could not set up response IP set");
 609         if(!respip_views_apply_cfg(daemon->views, daemon->cfg,
 610                 &have_view_respip_cfg))
 611                 fatal_exit("Could not set up per-view response IP sets");
 612         daemon->use_response_ip = !respip_set_is_empty(daemon->respip_set) ||
 613                 have_view_respip_cfg;
 614
 615         /* read auth zonefiles */
 616         if(!auth_zones_apply_cfg(daemon->env->auth_zones, daemon->cfg, 1))
 617                 fatal_exit("auth_zones could not be setup");
 618
 619         /* setup modules */
 620         daemon_setup_modules(daemon);
 621
 622         /* response-ip-xxx options don't work as expected without the respip
 623          * module.  To avoid run-time operational surprise we reject such
 624          * configuration. */
 625         if(daemon->use_response_ip &&
 626                 modstack_find(&daemon->mods, "respip") < 0)
 627                 fatal_exit("response-ip options require respip module");
 628
 629         /* first create all the worker structures, so we can pass
 630          * them to the newly created threads.
 631          */
 632         daemon_create_workers(daemon);
 633
 634 #if defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP)
 635         /* in libev the first inited base gets signals */
 636         if(!worker_init(daemon->workers[0], daemon->cfg, daemon->ports[0], 1))
 637                 fatal_exit("Could not initialize main thread");
 638 #endif
 639
 640         /* Now create the threads and init the workers.
 641          * By the way, this is thread #0 (the main thread).
 642          */
 643         daemon_start_others(daemon);
 644
 645         /* Special handling for the main thread. This is the thread
 646          * that handles signals and remote control.
 647          */
 648 #if !(defined(HAVE_EV_LOOP) || defined(HAVE_EV_DEFAULT_LOOP))
 649         /* libevent has the last inited base get signals (or any base) */
 650         if(!worker_init(daemon->workers[0], daemon->cfg, daemon->ports[0], 1))
 651                 fatal_exit("Could not initialize main thread");
 652 #endif
 653         signal_handling_playback(daemon->workers[0]);
 654
 655         if (!shm_main_init(daemon))
 656                 log_warn("SHM has failed");
 657
 658         /* Start resolver service on main thread. */
 659 #ifdef HAVE_SYSTEMD
 660         sd_notify(0, "READY=1");
 661 #endif
 662         log_info("start of service (%s).", PACKAGE_STRING);
 663         worker_work(daemon->workers[0]);
 664 #ifdef HAVE_SYSTEMD
 665         sd_notify(0, "STOPPING=1");
 666 #endif
 667         log_info("service stopped (%s).", PACKAGE_STRING);
 668
 669         /* we exited! a signal happened! Stop other threads */
 670         daemon_stop_others(daemon);
 671
 672         /* Shutdown SHM */
 673         shm_main_shutdown(daemon);
 674
 675         daemon->need_to_exit = daemon->workers[0]->need_to_exit;
 676 }
 677
 678 void
 679 daemon_cleanup(struct daemon* daemon)
 680 {
 681         int i;
 682         log_assert(daemon);
 683         /* before stopping main worker, handle signals ourselves, so we
 684            don't die on multiple reload signals for example. */
 685         signal_handling_record();
 686         log_thread_set(NULL);
 687         /* clean up caches because
 688          * a) RRset IDs will be recycled after a reload, causing collisions
 689          * b) validation config can change, thus rrset, msg, keycache clear */
 690         slabhash_clear(&daemon->env->rrset_cache->table);
 691         slabhash_clear(daemon->env->msg_cache);
 692         local_zones_delete(daemon->local_zones);
 693         daemon->local_zones = NULL;
 694         respip_set_delete(daemon->respip_set);
 695         daemon->respip_set = NULL;
 696         views_delete(daemon->views);
 697         daemon->views = NULL;
 698         if(daemon->env->auth_zones)
 699                 auth_zones_cleanup(daemon->env->auth_zones);
 700         /* key cache is cleared by module desetup during next daemon_fork() */
 701         daemon_remote_clear(daemon->rc);
 702         for(i=0; i<daemon->num; i++)
 703                 worker_delete(daemon->workers[i]);
 704         free(daemon->workers);
 705         daemon->workers = NULL;
 706         daemon->num = 0;
 707         alloc_clear_special(&daemon->superalloc);
 708 #ifdef USE_DNSTAP
 709         dt_delete(daemon->dtenv);
 710         daemon->dtenv = NULL;
 711 #endif
 712 #ifdef USE_DNSCRYPT
 713         dnsc_delete(daemon->dnscenv);
 714         daemon->dnscenv = NULL;
 715 #endif
 716         daemon->cfg = NULL;
 717 }
 718
 719 void
 720 daemon_delete(struct daemon* daemon)
 721 {
 722         size_t i;
 723         if(!daemon)
 724                 return;
 725         modstack_desetup(&daemon->mods, daemon->env);
 726         daemon_remote_delete(daemon->rc);
 727         for(i = 0; i < daemon->num_ports; i++)
 728                 listening_ports_free(daemon->ports[i]);
 729         free(daemon->ports);
 730         listening_ports_free(daemon->rc_ports);
 731         if(daemon->env) {
 732                 slabhash_delete(daemon->env->msg_cache);
 733                 rrset_cache_delete(daemon->env->rrset_cache);
 734                 infra_delete(daemon->env->infra_cache);
 735                 edns_known_options_delete(daemon->env);
 736                 auth_zones_delete(daemon->env->auth_zones);
 737         }
 738         ub_randfree(daemon->rand);
 739         alloc_clear(&daemon->superalloc);
 740         acl_list_delete(daemon->acl);
 741         free(daemon->chroot);
 742         free(daemon->pidfile);
 743         free(daemon->env);
 744 #ifdef HAVE_SSL
 745         SSL_CTX_free((SSL_CTX*)daemon->listen_sslctx);
 746         SSL_CTX_free((SSL_CTX*)daemon->connect_sslctx);
 747 #endif
 748         free(daemon);
 749 #ifdef LEX_HAS_YYLEX_DESTROY
 750         /* lex cleanup */
 751         ub_c_lex_destroy();
 752 #endif
 753         /* libcrypto cleanup */
 754 #ifdef HAVE_SSL
 755 #  if defined(USE_GOST) && defined(HAVE_LDNS_KEY_EVP_UNLOAD_GOST)
 756         sldns_key_EVP_unload_gost();
 757 #  endif
 758 #  if HAVE_DECL_SSL_COMP_GET_COMPRESSION_METHODS && HAVE_DECL_SK_SSL_COMP_POP_FREE
 759 #    ifndef S_SPLINT_S
 760 #      if OPENSSL_VERSION_NUMBER < 0x10100000
 761         sk_SSL_COMP_pop_free(comp_meth, (void(*)())CRYPTO_free);
 762 #      endif
 763 #    endif
 764 #  endif
 765 #  ifdef HAVE_OPENSSL_CONFIG
 766         EVP_cleanup();
 767 #  if OPENSSL_VERSION_NUMBER < 0x10100000
 768         ENGINE_cleanup();
 769 #  endif
 770         CONF_modules_free();
 771 #  endif
 772 #  ifdef HAVE_CRYPTO_CLEANUP_ALL_EX_DATA
 773         CRYPTO_cleanup_all_ex_data(); /* safe, no more threads right now */
 774 #  endif
 775 #  ifdef HAVE_ERR_FREE_STRINGS
 776         ERR_free_strings();
 777 #  endif
 778 #  if OPENSSL_VERSION_NUMBER < 0x10100000
 779         RAND_cleanup();
 780 #  endif
 781 #  if defined(HAVE_SSL) && defined(OPENSSL_THREADS) && !defined(THREADS_DISABLED)
 782         ub_openssl_lock_delete();
 783 #  endif
 784 #ifndef HAVE_ARC4RANDOM
 785         _ARC4_LOCK_DESTROY();
 786 #endif
 787 #elif defined(HAVE_NSS)
 788         NSS_Shutdown();
 789 #endif /* HAVE_SSL or HAVE_NSS */
 790         checklock_stop();
 791 #ifdef USE_WINSOCK
 792         if(WSACleanup() != 0) {
 793                 log_err("Could not WSACleanup: %s",
 794                         wsa_strerror(WSAGetLastError()));
 795         }
 796 #endif
 797 }
 798
 799 void daemon_apply_cfg(struct daemon* daemon, struct config_file* cfg)
 800 {
 801         daemon->cfg = cfg;
 802         config_apply(cfg);
 803         if(!daemon->env->msg_cache ||
 804            cfg->msg_cache_size != slabhash_get_size(daemon->env->msg_cache) ||
 805            cfg->msg_cache_slabs != daemon->env->msg_cache->size) {
 806                 slabhash_delete(daemon->env->msg_cache);
 807                 daemon->env->msg_cache = slabhash_create(cfg->msg_cache_slabs,
 808                         HASH_DEFAULT_STARTARRAY, cfg->msg_cache_size,
 809                         msgreply_sizefunc, query_info_compare,
 810                         query_entry_delete, reply_info_delete, NULL);
 811                 if(!daemon->env->msg_cache) {
 812                         fatal_exit("malloc failure updating config settings");
 813                 }
 814         }
 815         if((daemon->env->rrset_cache = rrset_cache_adjust(
 816                 daemon->env->rrset_cache, cfg, &daemon->superalloc)) == 0)
 817                 fatal_exit("malloc failure updating config settings");
 818         if((daemon->env->infra_cache = infra_adjust(daemon->env->infra_cache,
 819                 cfg))==0)
 820                 fatal_exit("malloc failure updating config settings");
 821 }