contrib/unbound/util/config_file.c

   1 /*
   2  * util/config_file.c - reads and stores the config file for unbound.
   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  * This file contains functions for the config file.
  40  */
  41
  42 #include "config.h"
  43 #include <ctype.h>
  44 #include <stdarg.h>
  45 #ifdef HAVE_TIME_H
  46 #include <time.h>
  47 #endif
  48 #include "util/log.h"
  49 #include "util/configyyrename.h"
  50 #include "util/config_file.h"
  51 #include "configparser.h"
  52 #include "util/net_help.h"
  53 #include "util/data/msgparse.h"
  54 #include "util/module.h"
  55 #include "util/regional.h"
  56 #include "util/fptr_wlist.h"
  57 #include "util/data/dname.h"
  58 #include "util/rtt.h"
  59 #include "services/cache/infra.h"
  60 #include "sldns/wire2str.h"
  61 #include "sldns/parseutil.h"
  62 #include "iterator/iterator.h"
  63 #ifdef HAVE_GLOB_H
  64 # include <glob.h>
  65 #endif
  66 #ifdef CLIENT_SUBNET
  67 #include "edns-subnet/edns-subnet.h"
  68 #endif
  69 #ifdef HAVE_PWD_H
  70 #include <pwd.h>
  71 #endif
  72
  73 /** from cfg username, after daemonize setup performed */
  74 uid_t cfg_uid = (uid_t)-1;
  75 /** from cfg username, after daemonize setup performed */
  76 gid_t cfg_gid = (gid_t)-1;
  77 /** for debug allow small timeout values for fast rollovers */
  78 int autr_permit_small_holddown = 0;
  79 /** size (in bytes) of stream wait buffers max */
  80 size_t stream_wait_max = 4 * 1024 * 1024;
  81 size_t http2_query_buffer_max = 4 * 1024 * 1024;
  82 size_t http2_response_buffer_max = 4 * 1024 * 1024;
  83
  84 /** global config during parsing */
  85 struct config_parser_state* cfg_parser = 0;
  86
  87 /** init ports possible for use */
  88 static void init_outgoing_availports(int* array, int num);
  89
  90 struct config_file*
  91 config_create(void)
  92 {
  93         struct config_file* cfg;
  94         cfg = (struct config_file*)calloc(1, sizeof(struct config_file));
  95         if(!cfg)
  96                 return NULL;
  97         /* the defaults if no config is present */
  98         cfg->verbosity = 1;
  99         cfg->stat_interval = 0;
 100         cfg->stat_cumulative = 0;
 101         cfg->stat_extended = 0;
 102         cfg->num_threads = 1;
 103         cfg->port = UNBOUND_DNS_PORT;
 104         cfg->do_ip4 = 1;
 105         cfg->do_ip6 = 1;
 106         cfg->do_udp = 1;
 107         cfg->do_tcp = 1;
 108         cfg->tcp_upstream = 0;
 109         cfg->udp_upstream_without_downstream = 0;
 110         cfg->tcp_mss = 0;
 111         cfg->outgoing_tcp_mss = 0;
 112         cfg->tcp_idle_timeout = 30 * 1000; /* 30s in millisecs */
 113         cfg->do_tcp_keepalive = 0;
 114         cfg->tcp_keepalive_timeout = 120 * 1000; /* 120s in millisecs */
 115         cfg->ssl_service_key = NULL;
 116         cfg->ssl_service_pem = NULL;
 117         cfg->ssl_port = UNBOUND_DNS_OVER_TLS_PORT;
 118         cfg->ssl_upstream = 0;
 119         cfg->tls_cert_bundle = NULL;
 120         cfg->tls_win_cert = 0;
 121         cfg->tls_use_sni = 1;
 122         cfg->https_port = UNBOUND_DNS_OVER_HTTPS_PORT;
 123         if(!(cfg->http_endpoint = strdup("/dns-query"))) goto error_exit;
 124         cfg->http_max_streams = 100;
 125         cfg->http_query_buffer_size = 4*1024*1024;
 126         cfg->http_response_buffer_size = 4*1024*1024;
 127         cfg->http_nodelay = 1;
 128         cfg->use_syslog = 1;
 129         cfg->log_identity = NULL; /* changed later with argv[0] */
 130         cfg->log_time_ascii = 0;
 131         cfg->log_queries = 0;
 132         cfg->log_replies = 0;
 133         cfg->log_tag_queryreply = 0;
 134         cfg->log_local_actions = 0;
 135         cfg->log_servfail = 0;
 136 #ifndef USE_WINSOCK
 137 #  ifdef USE_MINI_EVENT
 138         /* select max 1024 sockets */
 139         cfg->outgoing_num_ports = 960;
 140         cfg->num_queries_per_thread = 512;
 141 #  else
 142         /* libevent can use many sockets */
 143         cfg->outgoing_num_ports = 4096;
 144         cfg->num_queries_per_thread = 1024;
 145 #  endif
 146         cfg->outgoing_num_tcp = 10;
 147         cfg->incoming_num_tcp = 10;
 148 #else
 149         cfg->outgoing_num_ports = 48; /* windows is limited in num fds */
 150         cfg->num_queries_per_thread = 24;
 151         cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */
 152         cfg->incoming_num_tcp = 2;
 153 #endif
 154         cfg->stream_wait_size = 4 * 1024 * 1024;
 155         cfg->edns_buffer_size = 1232; /* from DNS flagday recommendation */
 156         cfg->msg_buffer_size = 65552; /* 64 k + a small margin */
 157         cfg->msg_cache_size = 4 * 1024 * 1024;
 158         cfg->msg_cache_slabs = 4;
 159         cfg->jostle_time = 200;
 160         cfg->rrset_cache_size = 4 * 1024 * 1024;
 161         cfg->rrset_cache_slabs = 4;
 162         cfg->host_ttl = 900;
 163         cfg->bogus_ttl = 60;
 164         cfg->min_ttl = 0;
 165         cfg->max_ttl = 3600 * 24;
 166         cfg->max_negative_ttl = 3600;
 167         cfg->prefetch = 0;
 168         cfg->prefetch_key = 0;
 169         cfg->deny_any = 0;
 170         cfg->infra_cache_slabs = 4;
 171         cfg->infra_cache_numhosts = 10000;
 172         cfg->infra_cache_min_rtt = 50;
 173         cfg->infra_keep_probing = 0;
 174         cfg->delay_close = 0;
 175         cfg->udp_connect = 1;
 176         if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int))))
 177                 goto error_exit;
 178         init_outgoing_availports(cfg->outgoing_avail_ports, 65536);
 179         if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit;
 180 #ifdef HAVE_CHROOT
 181         if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit;
 182 #endif
 183         if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit;
 184         if(!(cfg->logfile = strdup(""))) goto error_exit;
 185         if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit;
 186         if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit;
 187         cfg->fast_server_permil = 0;
 188         cfg->fast_server_num = 3;
 189         cfg->donotqueryaddrs = NULL;
 190         cfg->donotquery_localhost = 1;
 191         cfg->root_hints = NULL;
 192         cfg->use_systemd = 0;
 193         cfg->do_daemonize = 1;
 194         cfg->if_automatic = 0;
 195         cfg->so_rcvbuf = 0;
 196         cfg->so_sndbuf = 0;
 197         cfg->so_reuseport = REUSEPORT_DEFAULT;
 198         cfg->ip_transparent = 0;
 199         cfg->ip_freebind = 0;
 200         cfg->ip_dscp = 0;
 201         cfg->num_ifs = 0;
 202         cfg->ifs = NULL;
 203         cfg->num_out_ifs = 0;
 204         cfg->out_ifs = NULL;
 205         cfg->stubs = NULL;
 206         cfg->forwards = NULL;
 207         cfg->auths = NULL;
 208 #ifdef CLIENT_SUBNET
 209         cfg->client_subnet = NULL;
 210         cfg->client_subnet_zone = NULL;
 211         cfg->client_subnet_opcode = LDNS_EDNS_CLIENT_SUBNET;
 212         cfg->client_subnet_always_forward = 0;
 213         cfg->max_client_subnet_ipv4 = 24;
 214         cfg->max_client_subnet_ipv6 = 56;
 215         cfg->min_client_subnet_ipv4 = 0;
 216         cfg->min_client_subnet_ipv6 = 0;
 217         cfg->max_ecs_tree_size_ipv4 = 100;
 218         cfg->max_ecs_tree_size_ipv6 = 100;
 219 #endif
 220         cfg->views = NULL;
 221         cfg->acls = NULL;
 222         cfg->tcp_connection_limits = NULL;
 223         cfg->harden_short_bufsize = 0;
 224         cfg->harden_large_queries = 0;
 225         cfg->harden_glue = 1;
 226         cfg->harden_dnssec_stripped = 1;
 227         cfg->harden_below_nxdomain = 1;
 228         cfg->harden_referral_path = 0;
 229         cfg->harden_algo_downgrade = 0;
 230         cfg->use_caps_bits_for_id = 0;
 231         cfg->caps_whitelist = NULL;
 232         cfg->private_address = NULL;
 233         cfg->private_domain = NULL;
 234         cfg->unwanted_threshold = 0;
 235         cfg->hide_identity = 0;
 236         cfg->hide_version = 0;
 237         cfg->hide_trustanchor = 0;
 238         cfg->identity = NULL;
 239         cfg->version = NULL;
 240         cfg->auto_trust_anchor_file_list = NULL;
 241         cfg->trust_anchor_file_list = NULL;
 242         cfg->trust_anchor_list = NULL;
 243         cfg->trusted_keys_file_list = NULL;
 244         cfg->trust_anchor_signaling = 1;
 245         cfg->root_key_sentinel = 1;
 246         cfg->domain_insecure = NULL;
 247         cfg->val_date_override = 0;
 248         cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */
 249         cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */
 250         cfg->val_clean_additional = 1;
 251         cfg->val_log_level = 0;
 252         cfg->val_log_squelch = 0;
 253         cfg->val_permissive_mode = 0;
 254         cfg->aggressive_nsec = 0;
 255         cfg->ignore_cd = 0;
 256         cfg->serve_expired = 0;
 257         cfg->serve_expired_ttl = 0;
 258         cfg->serve_expired_ttl_reset = 0;
 259         cfg->serve_expired_reply_ttl = 30;
 260         cfg->serve_expired_client_timeout = 0;
 261         cfg->add_holddown = 30*24*3600;
 262         cfg->del_holddown = 30*24*3600;
 263         cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */
 264         cfg->permit_small_holddown = 0;
 265         cfg->key_cache_size = 4 * 1024 * 1024;
 266         cfg->key_cache_slabs = 4;
 267         cfg->neg_cache_size = 1 * 1024 * 1024;
 268         cfg->local_zones = NULL;
 269         cfg->local_zones_nodefault = NULL;
 270 #ifdef USE_IPSET
 271         cfg->local_zones_ipset = NULL;
 272 #endif
 273         cfg->local_zones_disable_default = 0;
 274         cfg->local_data = NULL;
 275         cfg->local_zone_overrides = NULL;
 276         cfg->unblock_lan_zones = 0;
 277         cfg->insecure_lan_zones = 0;
 278         cfg->python_script = NULL;
 279         cfg->dynlib_file = NULL;
 280         cfg->remote_control_enable = 0;
 281         cfg->control_ifs.first = NULL;
 282         cfg->control_ifs.last = NULL;
 283         cfg->control_port = UNBOUND_CONTROL_PORT;
 284         cfg->control_use_cert = 1;
 285         cfg->minimal_responses = 1;
 286         cfg->rrset_roundrobin = 1;
 287         cfg->unknown_server_time_limit = 376;
 288         cfg->max_udp_size = 4096;
 289         if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
 290                 goto error_exit;
 291         if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
 292                 goto error_exit;
 293         if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
 294                 goto error_exit;
 295         if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
 296                 goto error_exit;
 297
 298 #ifdef CLIENT_SUBNET
 299         if(!(cfg->module_conf = strdup("subnetcache validator iterator"))) goto error_exit;
 300 #else
 301         if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
 302 #endif
 303         if(!(cfg->val_nsec3_key_iterations =
 304                 strdup("1024 150 2048 500 4096 2500"))) goto error_exit;
 305 #if defined(DNSTAP_SOCKET_PATH)
 306         if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
 307                 goto error_exit;
 308 #endif
 309         cfg->dnstap_bidirectional = 1;
 310         cfg->dnstap_tls = 1;
 311         cfg->disable_dnssec_lame_check = 0;
 312         cfg->ip_ratelimit = 0;
 313         cfg->ratelimit = 0;
 314         cfg->ip_ratelimit_slabs = 4;
 315         cfg->ratelimit_slabs = 4;
 316         cfg->ip_ratelimit_size = 4*1024*1024;
 317         cfg->ratelimit_size = 4*1024*1024;
 318         cfg->ratelimit_for_domain = NULL;
 319         cfg->ratelimit_below_domain = NULL;
 320         cfg->ip_ratelimit_factor = 10;
 321         cfg->ratelimit_factor = 10;
 322         cfg->qname_minimisation = 1;
 323         cfg->qname_minimisation_strict = 0;
 324         cfg->shm_enable = 0;
 325         cfg->shm_key = 11777;
 326         cfg->edns_client_strings = NULL;
 327         cfg->edns_client_string_opcode = 65001;
 328         cfg->dnscrypt = 0;
 329         cfg->dnscrypt_port = 0;
 330         cfg->dnscrypt_provider = NULL;
 331         cfg->dnscrypt_provider_cert = NULL;
 332         cfg->dnscrypt_provider_cert_rotated = NULL;
 333         cfg->dnscrypt_secret_key = NULL;
 334         cfg->dnscrypt_shared_secret_cache_size = 4*1024*1024;
 335         cfg->dnscrypt_shared_secret_cache_slabs = 4;
 336         cfg->dnscrypt_nonce_cache_size = 4*1024*1024;
 337         cfg->dnscrypt_nonce_cache_slabs = 4;
 338 #ifdef USE_IPSECMOD
 339         cfg->ipsecmod_enabled = 1;
 340         cfg->ipsecmod_ignore_bogus = 0;
 341         cfg->ipsecmod_hook = NULL;
 342         cfg->ipsecmod_max_ttl = 3600;
 343         cfg->ipsecmod_whitelist = NULL;
 344         cfg->ipsecmod_strict = 0;
 345 #endif
 346 #ifdef USE_CACHEDB
 347         if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit;
 348         if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit;
 349 #ifdef USE_REDIS
 350         if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit;
 351         cfg->redis_timeout = 100;
 352         cfg->redis_server_port = 6379;
 353         cfg->redis_expire_records = 0;
 354 #endif  /* USE_REDIS */
 355 #endif  /* USE_CACHEDB */
 356 #ifdef USE_IPSET
 357         cfg->ipset_name_v4 = NULL;
 358         cfg->ipset_name_v6 = NULL;
 359 #endif
 360         return cfg;
 361 error_exit:
 362         config_delete(cfg);
 363         return NULL;
 364 }
 365
 366 struct config_file* config_create_forlib(void)
 367 {
 368         struct config_file* cfg = config_create();
 369         if(!cfg) return NULL;
 370         /* modifications for library use, less verbose, less memory */
 371         free(cfg->chrootdir);
 372         cfg->chrootdir = NULL;
 373         cfg->verbosity = 0;
 374         cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable'
 375                 and probably within the ulimit(maxfds) of the user */
 376         cfg->outgoing_num_tcp = 2;
 377         cfg->msg_cache_size = 1024*1024;
 378         cfg->msg_cache_slabs = 1;
 379         cfg->rrset_cache_size = 1024*1024;
 380         cfg->rrset_cache_slabs = 1;
 381         cfg->infra_cache_slabs = 1;
 382         cfg->use_syslog = 0;
 383         cfg->key_cache_size = 1024*1024;
 384         cfg->key_cache_slabs = 1;
 385         cfg->neg_cache_size = 100 * 1024;
 386         cfg->donotquery_localhost = 0; /* allow, so that you can ask a
 387                 forward nameserver running on localhost */
 388         cfg->val_log_level = 2; /* to fill why_bogus with */
 389         cfg->val_log_squelch = 1;
 390         cfg->minimal_responses = 0;
 391         return cfg;
 392 }
 393
 394 /** check that the value passed is >= 0 */
 395 #define IS_NUMBER_OR_ZERO \
 396         if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0
 397 /** check that the value passed is > 0 */
 398 #define IS_NONZERO_NUMBER \
 399         if(atoi(val) == 0) return 0
 400 /** check that the value passed is not 0 and a power of 2 */
 401 #define IS_POW2_NUMBER \
 402         if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0
 403 /** check that the value passed is yes or no */
 404 #define IS_YES_OR_NO \
 405         if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0
 406 /** put integer_or_zero into variable */
 407 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 408         { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); }
 409 /** put integer_nonzero into variable */
 410 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 411         { IS_NONZERO_NUMBER; cfg->var = atoi(val); }
 412 /** put integer_or_zero into unsigned */
 413 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 414         { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); }
 415 /** put integer_or_zero into size_t */
 416 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 417         { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); }
 418 /** put integer_nonzero into size_t */
 419 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 420         { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); }
 421 /** put yesno into variable */
 422 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \
 423         { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); }
 424 /** put memsize into variable */
 425 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \
 426         { return cfg_parse_memsize(val, &cfg->var); }
 427 /** put pow2 number into variable */
 428 #define S_POW2(str, var) if(strcmp(opt, str)==0) \
 429         { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); }
 430 /** put string into variable */
 431 #define S_STR(str, var) if(strcmp(opt, str)==0) \
 432         { free(cfg->var); return (cfg->var = strdup(val)) != NULL; }
 433 /** put string into strlist */
 434 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \
 435         { return cfg_strlist_insert(&cfg->var, strdup(val)); }
 436 /** put string into strlist if not present yet*/
 437 #define S_STRLIST_UNIQ(str, var) if(strcmp(opt, str)==0) \
 438         { if(cfg_strlist_find(cfg->var, val)) { return 0;} \
 439           return cfg_strlist_insert(&cfg->var, strdup(val)); }
 440 /** append string to strlist */
 441 #define S_STRLIST_APPEND(str, var) if(strcmp(opt, str)==0) \
 442         { return cfg_strlist_append(&cfg->var, strdup(val)); }
 443
 444 int config_set_option(struct config_file* cfg, const char* opt,
 445         const char* val)
 446 {
 447         char buf[64];
 448         if(!opt) return 0;
 449         if(opt[strlen(opt)-1] != ':' && strlen(opt)+2<sizeof(buf)) {
 450                 snprintf(buf, sizeof(buf), "%s:", opt);
 451                 opt = buf;
 452         }
 453         S_NUMBER_OR_ZERO("verbosity:", verbosity)
 454         else if(strcmp(opt, "statistics-interval:") == 0) {
 455                 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
 456                         cfg->stat_interval = 0;
 457                 else if(atoi(val) == 0)
 458                         return 0;
 459                 else cfg->stat_interval = atoi(val);
 460         } else if(strcmp(opt, "num_threads:") == 0) {
 461                 /* not supported, library must have 1 thread in bgworker */
 462                 return 0;
 463         } else if(strcmp(opt, "outgoing-port-permit:") == 0) {
 464                 return cfg_mark_ports(val, 1,
 465                         cfg->outgoing_avail_ports, 65536);
 466         } else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
 467                 return cfg_mark_ports(val, 0,
 468                         cfg->outgoing_avail_ports, 65536);
 469         } else if(strcmp(opt, "local-zone:") == 0) {
 470                 return cfg_parse_local_zone(cfg, val);
 471         } else if(strcmp(opt, "val-override-date:") == 0) {
 472                 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) {
 473                         cfg->val_date_override = 0;
 474                 } else if(strlen(val) == 14) {
 475                         cfg->val_date_override = cfg_convert_timeval(val);
 476                         return cfg->val_date_override != 0;
 477                 } else {
 478                         if(atoi(val) == 0) return 0;
 479                         cfg->val_date_override = (uint32_t)atoi(val);
 480                 }
 481         } else if(strcmp(opt, "local-data-ptr:") == 0) {
 482                 char* ptr = cfg_ptr_reverse((char*)opt);
 483                 return cfg_strlist_insert(&cfg->local_data, ptr);
 484         } else if(strcmp(opt, "logfile:") == 0) {
 485                 cfg->use_syslog = 0;
 486                 free(cfg->logfile);
 487                 return (cfg->logfile = strdup(val)) != NULL;
 488         }
 489         else if(strcmp(opt, "log-time-ascii:") == 0)
 490         { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0);
 491           log_set_time_asc(cfg->log_time_ascii); }
 492         else S_SIZET_NONZERO("max-udp-size:", max_udp_size)
 493         else S_YNO("use-syslog:", use_syslog)
 494         else S_STR("log-identity:", log_identity)
 495         else S_YNO("extended-statistics:", stat_extended)
 496         else S_YNO("statistics-cumulative:", stat_cumulative)
 497         else S_YNO("shm-enable:", shm_enable)
 498         else S_NUMBER_OR_ZERO("shm-key:", shm_key)
 499         else S_YNO("do-ip4:", do_ip4)
 500         else S_YNO("do-ip6:", do_ip6)
 501         else S_YNO("do-udp:", do_udp)
 502         else S_YNO("do-tcp:", do_tcp)
 503         else S_YNO("prefer-ip4:", prefer_ip4)
 504         else S_YNO("prefer-ip6:", prefer_ip6)
 505         else S_YNO("tcp-upstream:", tcp_upstream)
 506         else S_YNO("udp-upstream-without-downstream:",
 507                 udp_upstream_without_downstream)
 508         else S_NUMBER_NONZERO("tcp-mss:", tcp_mss)
 509         else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss)
 510         else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout)
 511         else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive)
 512         else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout)
 513         else S_YNO("ssl-upstream:", ssl_upstream)
 514         else S_STR("ssl-service-key:", ssl_service_key)
 515         else S_STR("ssl-service-pem:", ssl_service_pem)
 516         else S_NUMBER_NONZERO("ssl-port:", ssl_port)
 517         else S_STR("tls-cert-bundle:", tls_cert_bundle)
 518         else S_YNO("tls-win-cert:", tls_win_cert)
 519         else S_STRLIST("additional-tls-port:", tls_additional_port)
 520         else S_STRLIST("tls-additional-ports:", tls_additional_port)
 521         else S_STRLIST("tls-additional-port:", tls_additional_port)
 522         else S_STRLIST_APPEND("tls-session-ticket-keys:", tls_session_ticket_keys)
 523         else S_STR("tls-ciphers:", tls_ciphers)
 524         else S_STR("tls-ciphersuites:", tls_ciphersuites)
 525         else S_YNO("tls-use-sni:", tls_use_sni)
 526         else S_NUMBER_NONZERO("https-port:", https_port)
 527         else S_STR("http-endpoint:", http_endpoint)
 528         else S_NUMBER_NONZERO("http-max-streams:", http_max_streams)
 529         else S_MEMSIZE("http-query-buffer-size:", http_query_buffer_size)
 530         else S_MEMSIZE("http-response-buffer-size:", http_response_buffer_size)
 531         else S_YNO("http-nodelay:", http_nodelay)
 532         else S_YNO("http-notls-downstream:", http_notls_downstream)
 533         else S_YNO("interface-automatic:", if_automatic)
 534         else S_YNO("use-systemd:", use_systemd)
 535         else S_YNO("do-daemonize:", do_daemonize)
 536         else S_NUMBER_NONZERO("port:", port)
 537         else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports)
 538         else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp)
 539         else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp)
 540         else S_MEMSIZE("stream-wait-size:", stream_wait_size)
 541         else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size)
 542         else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size)
 543         else S_MEMSIZE("msg-cache-size:", msg_cache_size)
 544         else S_POW2("msg-cache-slabs:", msg_cache_slabs)
 545         else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread)
 546         else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time)
 547         else S_MEMSIZE("so-rcvbuf:", so_rcvbuf)
 548         else S_MEMSIZE("so-sndbuf:", so_sndbuf)
 549         else S_YNO("so-reuseport:", so_reuseport)
 550         else S_YNO("ip-transparent:", ip_transparent)
 551         else S_YNO("ip-freebind:", ip_freebind)
 552         else S_NUMBER_OR_ZERO("ip-dscp:", ip_dscp)
 553         else S_MEMSIZE("rrset-cache-size:", rrset_cache_size)
 554         else S_POW2("rrset-cache-slabs:", rrset_cache_slabs)
 555         else S_YNO("prefetch:", prefetch)
 556         else S_YNO("prefetch-key:", prefetch_key)
 557         else S_YNO("deny-any:", deny_any)
 558         else if(strcmp(opt, "cache-max-ttl:") == 0)
 559         { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
 560         else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
 561         { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
 562         else if(strcmp(opt, "cache-min-ttl:") == 0)
 563         { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
 564         else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
 565             IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val);
 566             RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt;
 567         }
 568         else S_YNO("infra-keep-probing:", infra_keep_probing)
 569         else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl)
 570         else S_POW2("infra-cache-slabs:", infra_cache_slabs)
 571         else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts)
 572         else S_NUMBER_OR_ZERO("delay-close:", delay_close)
 573         else S_YNO("udp-connect:", udp_connect)
 574         else S_STR("chroot:", chrootdir)
 575         else S_STR("username:", username)
 576         else S_STR("directory:", directory)
 577         else S_STR("pidfile:", pidfile)
 578         else S_YNO("hide-identity:", hide_identity)
 579         else S_YNO("hide-version:", hide_version)
 580         else S_YNO("hide-trustanchor:", hide_trustanchor)
 581         else S_STR("identity:", identity)
 582         else S_STR("version:", version)
 583         else S_STRLIST("root-hints:", root_hints)
 584         else S_STR("target-fetch-policy:", target_fetch_policy)
 585         else S_YNO("harden-glue:", harden_glue)
 586         else S_YNO("harden-short-bufsize:", harden_short_bufsize)
 587         else S_YNO("harden-large-queries:", harden_large_queries)
 588         else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
 589         else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
 590         else S_YNO("harden-referral-path:", harden_referral_path)
 591         else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
 592         else S_YNO("use-caps-for-id:", use_caps_bits_for_id)
 593         else S_STRLIST("caps-whitelist:", caps_whitelist)
 594         else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
 595         else S_STRLIST("private-address:", private_address)
 596         else S_STRLIST("private-domain:", private_domain)
 597         else S_YNO("do-not-query-localhost:", donotquery_localhost)
 598         else S_STRLIST("do-not-query-address:", donotqueryaddrs)
 599         else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list)
 600         else S_STRLIST("trust-anchor-file:", trust_anchor_file_list)
 601         else S_STRLIST("trust-anchor:", trust_anchor_list)
 602         else S_STRLIST("trusted-keys-file:", trusted_keys_file_list)
 603         else S_YNO("trust-anchor-signaling:", trust_anchor_signaling)
 604         else S_YNO("root-key-sentinel:", root_key_sentinel)
 605         else S_STRLIST("domain-insecure:", domain_insecure)
 606         else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl)
 607         else S_YNO("val-clean-additional:", val_clean_additional)
 608         else S_NUMBER_OR_ZERO("val-log-level:", val_log_level)
 609         else S_YNO("val-log-squelch:", val_log_squelch)
 610         else S_YNO("log-queries:", log_queries)
 611         else S_YNO("log-replies:", log_replies)
 612         else S_YNO("log-tag-queryreply:", log_tag_queryreply)
 613         else S_YNO("log-local-actions:", log_local_actions)
 614         else S_YNO("log-servfail:", log_servfail)
 615         else S_YNO("val-permissive-mode:", val_permissive_mode)
 616         else S_YNO("aggressive-nsec:", aggressive_nsec)
 617         else S_YNO("ignore-cd-flag:", ignore_cd)
 618         else if(strcmp(opt, "serve-expired:") == 0)
 619         { IS_YES_OR_NO; cfg->serve_expired = (strcmp(val, "yes") == 0);
 620           SERVE_EXPIRED = cfg->serve_expired; }
 621         else if(strcmp(opt, "serve-expired-ttl:") == 0)
 622         { IS_NUMBER_OR_ZERO; cfg->serve_expired_ttl = atoi(val); SERVE_EXPIRED_TTL=(time_t)cfg->serve_expired_ttl;}
 623         else S_YNO("serve-expired-ttl-reset:", serve_expired_ttl_reset)
 624         else if(strcmp(opt, "serve-expired-reply-ttl:") == 0)
 625         { IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;}
 626         else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout)
 627         else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
 628         else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown)
 629         else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown)
 630         else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing)
 631         else if(strcmp(opt, "permit-small-holddown:") == 0)
 632         { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0);
 633           autr_permit_small_holddown = cfg->permit_small_holddown; }
 634         else S_MEMSIZE("key-cache-size:", key_cache_size)
 635         else S_POW2("key-cache-slabs:", key_cache_slabs)
 636         else S_MEMSIZE("neg-cache-size:", neg_cache_size)
 637         else S_YNO("minimal-responses:", minimal_responses)
 638         else S_YNO("rrset-roundrobin:", rrset_roundrobin)
 639         else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit)
 640         else S_STRLIST("local-data:", local_data)
 641         else S_YNO("unblock-lan-zones:", unblock_lan_zones)
 642         else S_YNO("insecure-lan-zones:", insecure_lan_zones)
 643         else S_YNO("control-enable:", remote_control_enable)
 644         else S_STRLIST_APPEND("control-interface:", control_ifs)
 645         else S_NUMBER_NONZERO("control-port:", control_port)
 646         else S_STR("server-key-file:", server_key_file)
 647         else S_STR("server-cert-file:", server_cert_file)
 648         else S_STR("control-key-file:", control_key_file)
 649         else S_STR("control-cert-file:", control_cert_file)
 650         else S_STR("module-config:", module_conf)
 651         else S_STRLIST("python-script:", python_script)
 652         else S_STRLIST("dynlib-file:", dynlib_file)
 653         else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check)
 654 #ifdef CLIENT_SUBNET
 655         /* Can't set max subnet prefix here, since that value is used when
 656          * generating the address tree. */
 657         /* No client-subnet-always-forward here, module registration depends on
 658          * this option. */
 659 #endif
 660 #ifdef USE_DNSTAP
 661         else S_YNO("dnstap-enable:", dnstap)
 662         else S_YNO("dnstap-bidirectional:", dnstap_bidirectional)
 663         else S_STR("dnstap-socket-path:", dnstap_socket_path)
 664         else S_STR("dnstap-ip:", dnstap_ip)
 665         else S_YNO("dnstap-tls:", dnstap_tls)
 666         else S_STR("dnstap-tls-server-name:", dnstap_tls_server_name)
 667         else S_STR("dnstap-tls-cert-bundle:", dnstap_tls_cert_bundle)
 668         else S_STR("dnstap-tls-client-key-file:", dnstap_tls_client_key_file)
 669         else S_STR("dnstap-tls-client-cert-file:",
 670                 dnstap_tls_client_cert_file)
 671         else S_YNO("dnstap-send-identity:", dnstap_send_identity)
 672         else S_YNO("dnstap-send-version:", dnstap_send_version)
 673         else S_STR("dnstap-identity:", dnstap_identity)
 674         else S_STR("dnstap-version:", dnstap_version)
 675         else S_YNO("dnstap-log-resolver-query-messages:",
 676                 dnstap_log_resolver_query_messages)
 677         else S_YNO("dnstap-log-resolver-response-messages:",
 678                 dnstap_log_resolver_response_messages)
 679         else S_YNO("dnstap-log-client-query-messages:",
 680                 dnstap_log_client_query_messages)
 681         else S_YNO("dnstap-log-client-response-messages:",
 682                 dnstap_log_client_response_messages)
 683         else S_YNO("dnstap-log-forwarder-query-messages:",
 684                 dnstap_log_forwarder_query_messages)
 685         else S_YNO("dnstap-log-forwarder-response-messages:",
 686                 dnstap_log_forwarder_response_messages)
 687 #endif
 688 #ifdef USE_DNSCRYPT
 689         else S_YNO("dnscrypt-enable:", dnscrypt)
 690         else S_NUMBER_NONZERO("dnscrypt-port:", dnscrypt_port)
 691         else S_STR("dnscrypt-provider:", dnscrypt_provider)
 692         else S_STRLIST_UNIQ("dnscrypt-provider-cert:", dnscrypt_provider_cert)
 693         else S_STRLIST("dnscrypt-provider-cert-rotated:", dnscrypt_provider_cert_rotated)
 694         else S_STRLIST_UNIQ("dnscrypt-secret-key:", dnscrypt_secret_key)
 695         else S_MEMSIZE("dnscrypt-shared-secret-cache-size:",
 696                 dnscrypt_shared_secret_cache_size)
 697         else S_POW2("dnscrypt-shared-secret-cache-slabs:",
 698                 dnscrypt_shared_secret_cache_slabs)
 699         else S_MEMSIZE("dnscrypt-nonce-cache-size:",
 700                 dnscrypt_nonce_cache_size)
 701         else S_POW2("dnscrypt-nonce-cache-slabs:",
 702                 dnscrypt_nonce_cache_slabs)
 703 #endif
 704         else if(strcmp(opt, "ip-ratelimit:") == 0) {
 705             IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val);
 706             infra_ip_ratelimit=cfg->ip_ratelimit;
 707         }
 708         else if(strcmp(opt, "ratelimit:") == 0) {
 709             IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val);
 710             infra_dp_ratelimit=cfg->ratelimit;
 711         }
 712         else S_MEMSIZE("ip-ratelimit-size:", ip_ratelimit_size)
 713         else S_MEMSIZE("ratelimit-size:", ratelimit_size)
 714         else S_POW2("ip-ratelimit-slabs:", ip_ratelimit_slabs)
 715         else S_POW2("ratelimit-slabs:", ratelimit_slabs)
 716         else S_NUMBER_OR_ZERO("ip-ratelimit-factor:", ip_ratelimit_factor)
 717         else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor)
 718         else S_SIZET_NONZERO("fast-server-num:", fast_server_num)
 719         else S_NUMBER_OR_ZERO("fast-server-permil:", fast_server_permil)
 720         else S_YNO("qname-minimisation:", qname_minimisation)
 721         else S_YNO("qname-minimisation-strict:", qname_minimisation_strict)
 722 #ifdef USE_IPSECMOD
 723         else S_YNO("ipsecmod-enabled:", ipsecmod_enabled)
 724         else S_YNO("ipsecmod-ignore-bogus:", ipsecmod_ignore_bogus)
 725         else if(strcmp(opt, "ipsecmod-max-ttl:") == 0)
 726         { IS_NUMBER_OR_ZERO; cfg->ipsecmod_max_ttl = atoi(val); }
 727         else S_YNO("ipsecmod-strict:", ipsecmod_strict)
 728 #endif
 729         else if(strcmp(opt, "define-tag:") ==0) {
 730                 return config_add_tag(cfg, val);
 731         /* val_sig_skew_min and max are copied into val_env during init,
 732          * so this does not update val_env with set_option */
 733         } else if(strcmp(opt, "val-sig-skew-min:") == 0)
 734         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); }
 735         else if(strcmp(opt, "val-sig-skew-max:") == 0)
 736         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); }
 737         else if (strcmp(opt, "outgoing-interface:") == 0) {
 738                 char* d = strdup(val);
 739                 char** oi =
 740                 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
 741                 if(!d || !oi) { free(d); free(oi); return -1; }
 742                 if(cfg->out_ifs && cfg->num_out_ifs) {
 743                         memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*));
 744                         free(cfg->out_ifs);
 745                 }
 746                 oi[cfg->num_out_ifs++] = d;
 747                 cfg->out_ifs = oi;
 748         } else {
 749                 /* unknown or unsupported (from the set_option interface):
 750                  * interface, outgoing-interface, access-control,
 751                  * stub-zone, name, stub-addr, stub-host, stub-prime
 752                  * forward-first, stub-first, forward-ssl-upstream,
 753                  * stub-ssl-upstream, forward-zone, auth-zone
 754                  * name, forward-addr, forward-host,
 755                  * ratelimit-for-domain, ratelimit-below-domain,
 756                  * local-zone-tag, access-control-view,
 757                  * send-client-subnet, client-subnet-always-forward,
 758                  * max-client-subnet-ipv4, max-client-subnet-ipv6,
 759                  * min-client-subnet-ipv4, min-client-subnet-ipv6,
 760                  * max-ecs-tree-size-ipv4, max-ecs-tree-size-ipv6, ipsecmod_hook,
 761                  * ipsecmod_whitelist. */
 762                 return 0;
 763         }
 764         return 1;
 765 }
 766
 767 void config_print_func(char* line, void* arg)
 768 {
 769         FILE* f = (FILE*)arg;
 770         (void)fprintf(f, "%s\n", line);
 771 }
 772
 773 /** collate func arg */
 774 struct config_collate_arg {
 775         /** list of result items */
 776         struct config_strlist_head list;
 777         /** if a malloc error occurred, 0 is OK */
 778         int status;
 779 };
 780
 781 void config_collate_func(char* line, void* arg)
 782 {
 783         struct config_collate_arg* m = (struct config_collate_arg*)arg;
 784         if(m->status)
 785                 return;
 786         if(!cfg_strlist_append(&m->list, strdup(line)))
 787                 m->status = 1;
 788 }
 789
 790 int config_get_option_list(struct config_file* cfg, const char* opt,
 791         struct config_strlist** list)
 792 {
 793         struct config_collate_arg m;
 794         memset(&m, 0, sizeof(m));
 795         *list = NULL;
 796         if(!config_get_option(cfg, opt, config_collate_func, &m))
 797                 return 1;
 798         if(m.status) {
 799                 config_delstrlist(m.list.first);
 800                 return 2;
 801         }
 802         *list = m.list.first;
 803         return 0;
 804 }
 805
 806 int
 807 config_get_option_collate(struct config_file* cfg, const char* opt, char** str)
 808 {
 809         struct config_strlist* list = NULL;
 810         int r;
 811         *str = NULL;
 812         if((r = config_get_option_list(cfg, opt, &list)) != 0)
 813                 return r;
 814         *str = config_collate_cat(list);
 815         config_delstrlist(list);
 816         if(!*str) return 2;
 817         return 0;
 818 }
 819
 820 char*
 821 config_collate_cat(struct config_strlist* list)
 822 {
 823         size_t total = 0, left;
 824         struct config_strlist* s;
 825         char *r, *w;
 826         if(!list) /* no elements */
 827                 return strdup("");
 828         if(list->next == NULL) /* one element , no newline at end. */
 829                 return strdup(list->str);
 830         /* count total length */
 831         for(s=list; s; s=s->next)
 832                 total += strlen(s->str) + 1; /* len + newline */
 833         left = total+1; /* one extra for nul at end */
 834         r = malloc(left);
 835         if(!r)
 836                 return NULL;
 837         w = r;
 838         for(s=list; s; s=s->next) {
 839                 size_t this = strlen(s->str);
 840                 if(this+2 > left) { /* sanity check */
 841                         free(r);
 842                         return NULL;
 843                 }
 844                 snprintf(w, left, "%s\n", s->str);
 845                 this = strlen(w);
 846                 w += this;
 847                 left -= this;
 848         }
 849         return r;
 850 }
 851
 852 /** compare and print decimal option */
 853 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \
 854         {snprintf(buf, len, "%d", (int)cfg->var); \
 855         func(buf, arg);}
 856 /** compare and print unsigned option */
 857 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \
 858         {snprintf(buf, len, "%u", (unsigned)cfg->var); \
 859         func(buf, arg);}
 860 /** compare and print yesno option */
 861 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \
 862         {func(cfg->var?"yes":"no", arg);}
 863 /** compare and print string option */
 864 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \
 865         {func(cfg->var?cfg->var:"", arg);}
 866 /** compare and print array option */
 867 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \
 868         {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);}
 869 /** compare and print memorysize option */
 870 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \
 871         if(cfg->var > 1024*1024*1024) { \
 872           size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \
 873           snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \
 874         } else snprintf(buf, len, "%u", (unsigned)cfg->var); \
 875         func(buf, arg);}
 876 /** compare and print list option */
 877 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \
 878         struct config_strlist* p = cfg->lst; \
 879         for(p = cfg->lst; p; p = p->next) \
 880                 func(p->str, arg); \
 881         }
 882 /** compare and print list option */
 883 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \
 884         struct config_str2list* p = cfg->lst; \
 885         for(p = cfg->lst; p; p = p->next) { \
 886                 snprintf(buf, len, "%s %s", p->str, p->str2); \
 887                 func(buf, arg); \
 888         } \
 889         }
 890 /** compare and print list option */
 891 #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \
 892         struct config_str3list* p = cfg->lst; \
 893         for(p = cfg->lst; p; p = p->next) { \
 894                 snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \
 895                 func(buf, arg); \
 896         } \
 897         }
 898 /** compare and print taglist option */
 899 #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \
 900         char* tmpstr = NULL; \
 901         struct config_strbytelist *p = cfg->lst; \
 902         for(p = cfg->lst; p; p = p->next) {\
 903                 tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \
 904                 if(tmpstr) {\
 905                         snprintf(buf, len, "%s %s", p->str, tmpstr); \
 906                         func(buf, arg); \
 907                         free(tmpstr); \
 908                 } \
 909         } \
 910         }
 911
 912 int
 913 config_get_option(struct config_file* cfg, const char* opt,
 914         void (*func)(char*,void*), void* arg)
 915 {
 916         char buf[1024], nopt[64];
 917         size_t len = sizeof(buf);
 918         if(!opt) return 0;
 919         if(opt && opt[strlen(opt)-1] == ':' && strlen(opt)<sizeof(nopt)) {
 920                 memmove(nopt, opt, strlen(opt));
 921                 nopt[strlen(opt)-1] = 0;
 922                 opt = nopt;
 923         }
 924         fptr_ok(fptr_whitelist_print_func(func));
 925         O_DEC(opt, "verbosity", verbosity)
 926         else O_DEC(opt, "statistics-interval", stat_interval)
 927         else O_YNO(opt, "statistics-cumulative", stat_cumulative)
 928         else O_YNO(opt, "extended-statistics", stat_extended)
 929         else O_YNO(opt, "shm-enable", shm_enable)
 930         else O_DEC(opt, "shm-key", shm_key)
 931         else O_YNO(opt, "use-syslog", use_syslog)
 932         else O_STR(opt, "log-identity", log_identity)
 933         else O_YNO(opt, "log-time-ascii", log_time_ascii)
 934         else O_DEC(opt, "num-threads", num_threads)
 935         else O_IFC(opt, "interface", num_ifs, ifs)
 936         else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
 937         else O_YNO(opt, "interface-automatic", if_automatic)
 938         else O_DEC(opt, "port", port)
 939         else O_DEC(opt, "outgoing-range", outgoing_num_ports)
 940         else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
 941         else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
 942         else O_MEM(opt, "stream-wait-size", stream_wait_size)
 943         else O_DEC(opt, "edns-buffer-size", edns_buffer_size)
 944         else O_DEC(opt, "msg-buffer-size", msg_buffer_size)
 945         else O_MEM(opt, "msg-cache-size", msg_cache_size)
 946         else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs)
 947         else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread)
 948         else O_UNS(opt, "jostle-timeout", jostle_time)
 949         else O_MEM(opt, "so-rcvbuf", so_rcvbuf)
 950         else O_MEM(opt, "so-sndbuf", so_sndbuf)
 951         else O_YNO(opt, "so-reuseport", so_reuseport)
 952         else O_YNO(opt, "ip-transparent", ip_transparent)
 953         else O_YNO(opt, "ip-freebind", ip_freebind)
 954         else O_DEC(opt, "ip-dscp", ip_dscp)
 955         else O_MEM(opt, "rrset-cache-size", rrset_cache_size)
 956         else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs)
 957         else O_YNO(opt, "prefetch-key", prefetch_key)
 958         else O_YNO(opt, "prefetch", prefetch)
 959         else O_YNO(opt, "deny-any", deny_any)
 960         else O_DEC(opt, "cache-max-ttl", max_ttl)
 961         else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
 962         else O_DEC(opt, "cache-min-ttl", min_ttl)
 963         else O_DEC(opt, "infra-host-ttl", host_ttl)
 964         else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
 965         else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt)
 966         else O_YNO(opt, "infra-keep-probing", infra_keep_probing)
 967         else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts)
 968         else O_UNS(opt, "delay-close", delay_close)
 969         else O_YNO(opt, "udp-connect", udp_connect)
 970         else O_YNO(opt, "do-ip4", do_ip4)
 971         else O_YNO(opt, "do-ip6", do_ip6)
 972         else O_YNO(opt, "do-udp", do_udp)
 973         else O_YNO(opt, "do-tcp", do_tcp)
 974         else O_YNO(opt, "prefer-ip4", prefer_ip4)
 975         else O_YNO(opt, "prefer-ip6", prefer_ip6)
 976         else O_YNO(opt, "tcp-upstream", tcp_upstream)
 977         else O_YNO(opt, "udp-upstream-without-downstream", udp_upstream_without_downstream)
 978         else O_DEC(opt, "tcp-mss", tcp_mss)
 979         else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss)
 980         else O_DEC(opt, "tcp-idle-timeout", tcp_idle_timeout)
 981         else O_YNO(opt, "edns-tcp-keepalive", do_tcp_keepalive)
 982         else O_DEC(opt, "edns-tcp-keepalive-timeout", tcp_keepalive_timeout)
 983         else O_YNO(opt, "ssl-upstream", ssl_upstream)
 984         else O_STR(opt, "ssl-service-key", ssl_service_key)
 985         else O_STR(opt, "ssl-service-pem", ssl_service_pem)
 986         else O_DEC(opt, "ssl-port", ssl_port)
 987         else O_STR(opt, "tls-cert-bundle", tls_cert_bundle)
 988         else O_YNO(opt, "tls-win-cert", tls_win_cert)
 989         else O_LST(opt, "tls-additional-port", tls_additional_port)
 990         else O_LST(opt, "tls-session-ticket-keys", tls_session_ticket_keys.first)
 991         else O_STR(opt, "tls-ciphers", tls_ciphers)
 992         else O_STR(opt, "tls-ciphersuites", tls_ciphersuites)
 993         else O_YNO(opt, "tls-use-sni", tls_use_sni)
 994         else O_DEC(opt, "https-port", https_port)
 995         else O_STR(opt, "http-endpoint", http_endpoint)
 996         else O_UNS(opt, "http-max-streams", http_max_streams)
 997         else O_MEM(opt, "http-query-buffer-size", http_query_buffer_size)
 998         else O_MEM(opt, "http-response-buffer-size", http_response_buffer_size)
 999         else O_YNO(opt, "http-nodelay", http_nodelay)
1000         else O_YNO(opt, "http-notls-downstream", http_notls_downstream)
1001         else O_YNO(opt, "use-systemd", use_systemd)
1002         else O_YNO(opt, "do-daemonize", do_daemonize)
1003         else O_STR(opt, "chroot", chrootdir)
1004         else O_STR(opt, "username", username)
1005         else O_STR(opt, "directory", directory)
1006         else O_STR(opt, "logfile", logfile)
1007         else O_YNO(opt, "log-queries", log_queries)
1008         else O_YNO(opt, "log-replies", log_replies)
1009         else O_YNO(opt, "log-tag-queryreply", log_tag_queryreply)
1010         else O_YNO(opt, "log-local-actions", log_local_actions)
1011         else O_YNO(opt, "log-servfail", log_servfail)
1012         else O_STR(opt, "pidfile", pidfile)
1013         else O_YNO(opt, "hide-identity", hide_identity)
1014         else O_YNO(opt, "hide-version", hide_version)
1015         else O_YNO(opt, "hide-trustanchor", hide_trustanchor)
1016         else O_STR(opt, "identity", identity)
1017         else O_STR(opt, "version", version)
1018         else O_STR(opt, "target-fetch-policy", target_fetch_policy)
1019         else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize)
1020         else O_YNO(opt, "harden-large-queries", harden_large_queries)
1021         else O_YNO(opt, "harden-glue", harden_glue)
1022         else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
1023         else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
1024         else O_YNO(opt, "harden-referral-path", harden_referral_path)
1025         else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
1026         else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
1027         else O_LST(opt, "caps-whitelist", caps_whitelist)
1028         else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
1029         else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)
1030         else O_STR(opt, "module-config", module_conf)
1031         else O_DEC(opt, "val-bogus-ttl", bogus_ttl)
1032         else O_YNO(opt, "val-clean-additional", val_clean_additional)
1033         else O_DEC(opt, "val-log-level", val_log_level)
1034         else O_YNO(opt, "val-permissive-mode", val_permissive_mode)
1035         else O_YNO(opt, "aggressive-nsec", aggressive_nsec)
1036         else O_YNO(opt, "ignore-cd-flag", ignore_cd)
1037         else O_YNO(opt, "serve-expired", serve_expired)
1038         else O_DEC(opt, "serve-expired-ttl", serve_expired_ttl)
1039         else O_YNO(opt, "serve-expired-ttl-reset", serve_expired_ttl_reset)
1040         else O_DEC(opt, "serve-expired-reply-ttl", serve_expired_reply_ttl)
1041         else O_DEC(opt, "serve-expired-client-timeout", serve_expired_client_timeout)
1042         else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations)
1043         else O_UNS(opt, "add-holddown", add_holddown)
1044         else O_UNS(opt, "del-holddown", del_holddown)
1045         else O_UNS(opt, "keep-missing", keep_missing)
1046         else O_YNO(opt, "permit-small-holddown", permit_small_holddown)
1047         else O_MEM(opt, "key-cache-size", key_cache_size)
1048         else O_DEC(opt, "key-cache-slabs", key_cache_slabs)
1049         else O_MEM(opt, "neg-cache-size", neg_cache_size)
1050         else O_YNO(opt, "control-enable", remote_control_enable)
1051         else O_DEC(opt, "control-port", control_port)
1052         else O_STR(opt, "server-key-file", server_key_file)
1053         else O_STR(opt, "server-cert-file", server_cert_file)
1054         else O_STR(opt, "control-key-file", control_key_file)
1055         else O_STR(opt, "control-cert-file", control_cert_file)
1056         else O_LST(opt, "root-hints", root_hints)
1057         else O_LS2(opt, "access-control", acls)
1058         else O_LS2(opt, "tcp-connection-limit", tcp_connection_limits)
1059         else O_LST(opt, "do-not-query-address", donotqueryaddrs)
1060         else O_LST(opt, "private-address", private_address)
1061         else O_LST(opt, "private-domain", private_domain)
1062         else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list)
1063         else O_LST(opt, "trust-anchor-file", trust_anchor_file_list)
1064         else O_LST(opt, "trust-anchor", trust_anchor_list)
1065         else O_LST(opt, "trusted-keys-file", trusted_keys_file_list)
1066         else O_YNO(opt, "trust-anchor-signaling", trust_anchor_signaling)
1067         else O_YNO(opt, "root-key-sentinel", root_key_sentinel)
1068         else O_LST(opt, "control-interface", control_ifs.first)
1069         else O_LST(opt, "domain-insecure", domain_insecure)
1070         else O_UNS(opt, "val-override-date", val_date_override)
1071         else O_YNO(opt, "minimal-responses", minimal_responses)
1072         else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
1073         else O_DEC(opt, "unknown-server-time-limit", unknown_server_time_limit)
1074 #ifdef CLIENT_SUBNET
1075         else O_LST(opt, "send-client-subnet", client_subnet)
1076         else O_LST(opt, "client-subnet-zone", client_subnet_zone)
1077         else O_DEC(opt, "max-client-subnet-ipv4", max_client_subnet_ipv4)
1078         else O_DEC(opt, "max-client-subnet-ipv6", max_client_subnet_ipv6)
1079         else O_DEC(opt, "min-client-subnet-ipv4", min_client_subnet_ipv4)
1080         else O_DEC(opt, "min-client-subnet-ipv6", min_client_subnet_ipv6)
1081         else O_DEC(opt, "max-ecs-tree-size-ipv4", max_ecs_tree_size_ipv4)
1082         else O_DEC(opt, "max-ecs-tree-size-ipv6", max_ecs_tree_size_ipv6)
1083         else O_YNO(opt, "client-subnet-always-forward:",
1084                 client_subnet_always_forward)
1085 #endif
1086 #ifdef USE_DNSTAP
1087         else O_YNO(opt, "dnstap-enable", dnstap)
1088         else O_YNO(opt, "dnstap-bidirectional", dnstap_bidirectional)
1089         else O_STR(opt, "dnstap-socket-path", dnstap_socket_path)
1090         else O_STR(opt, "dnstap-ip", dnstap_ip)
1091         else O_YNO(opt, "dnstap-tls", dnstap_tls)
1092         else O_STR(opt, "dnstap-tls-server-name", dnstap_tls_server_name)
1093         else O_STR(opt, "dnstap-tls-cert-bundle", dnstap_tls_cert_bundle)
1094         else O_STR(opt, "dnstap-tls-client-key-file",
1095                 dnstap_tls_client_key_file)
1096         else O_STR(opt, "dnstap-tls-client-cert-file",
1097                 dnstap_tls_client_cert_file)
1098         else O_YNO(opt, "dnstap-send-identity", dnstap_send_identity)
1099         else O_YNO(opt, "dnstap-send-version", dnstap_send_version)
1100         else O_STR(opt, "dnstap-identity", dnstap_identity)
1101         else O_STR(opt, "dnstap-version", dnstap_version)
1102         else O_YNO(opt, "dnstap-log-resolver-query-messages",
1103                 dnstap_log_resolver_query_messages)
1104         else O_YNO(opt, "dnstap-log-resolver-response-messages",
1105                 dnstap_log_resolver_response_messages)
1106         else O_YNO(opt, "dnstap-log-client-query-messages",
1107                 dnstap_log_client_query_messages)
1108         else O_YNO(opt, "dnstap-log-client-response-messages",
1109                 dnstap_log_client_response_messages)
1110         else O_YNO(opt, "dnstap-log-forwarder-query-messages",
1111                 dnstap_log_forwarder_query_messages)
1112         else O_YNO(opt, "dnstap-log-forwarder-response-messages",
1113                 dnstap_log_forwarder_response_messages)
1114 #endif
1115 #ifdef USE_DNSCRYPT
1116         else O_YNO(opt, "dnscrypt-enable", dnscrypt)
1117         else O_DEC(opt, "dnscrypt-port", dnscrypt_port)
1118         else O_STR(opt, "dnscrypt-provider", dnscrypt_provider)
1119         else O_LST(opt, "dnscrypt-provider-cert", dnscrypt_provider_cert)
1120         else O_LST(opt, "dnscrypt-provider-cert-rotated", dnscrypt_provider_cert_rotated)
1121         else O_LST(opt, "dnscrypt-secret-key", dnscrypt_secret_key)
1122         else O_MEM(opt, "dnscrypt-shared-secret-cache-size",
1123                 dnscrypt_shared_secret_cache_size)
1124         else O_DEC(opt, "dnscrypt-shared-secret-cache-slabs",
1125                 dnscrypt_shared_secret_cache_slabs)
1126         else O_MEM(opt, "dnscrypt-nonce-cache-size",
1127                 dnscrypt_nonce_cache_size)
1128         else O_DEC(opt, "dnscrypt-nonce-cache-slabs",
1129                 dnscrypt_nonce_cache_slabs)
1130 #endif
1131         else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones)
1132         else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones)
1133         else O_DEC(opt, "max-udp-size", max_udp_size)
1134         else O_LST(opt, "python-script", python_script)
1135         else O_LST(opt, "dynlib-file", dynlib_file)
1136         else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check)
1137         else O_DEC(opt, "ip-ratelimit", ip_ratelimit)
1138         else O_DEC(opt, "ratelimit", ratelimit)
1139         else O_MEM(opt, "ip-ratelimit-size", ip_ratelimit_size)
1140         else O_MEM(opt, "ratelimit-size", ratelimit_size)
1141         else O_DEC(opt, "ip-ratelimit-slabs", ip_ratelimit_slabs)
1142         else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs)
1143         else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain)
1144         else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain)
1145         else O_DEC(opt, "ip-ratelimit-factor", ip_ratelimit_factor)
1146         else O_DEC(opt, "ratelimit-factor", ratelimit_factor)
1147         else O_DEC(opt, "fast-server-num", fast_server_num)
1148         else O_DEC(opt, "fast-server-permil", fast_server_permil)
1149         else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min)
1150         else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max)
1151         else O_YNO(opt, "qname-minimisation", qname_minimisation)
1152         else O_YNO(opt, "qname-minimisation-strict", qname_minimisation_strict)
1153         else O_IFC(opt, "define-tag", num_tags, tagname)
1154         else O_LTG(opt, "local-zone-tag", local_zone_tags)
1155         else O_LTG(opt, "access-control-tag", acl_tags)
1156         else O_LTG(opt, "response-ip-tag", respip_tags)
1157         else O_LS3(opt, "local-zone-override", local_zone_overrides)
1158         else O_LS3(opt, "access-control-tag-action", acl_tag_actions)
1159         else O_LS3(opt, "access-control-tag-data", acl_tag_datas)
1160         else O_LS2(opt, "access-control-view", acl_view)
1161         else O_LS2(opt, "edns-client-strings", edns_client_strings)
1162 #ifdef USE_IPSECMOD
1163         else O_YNO(opt, "ipsecmod-enabled", ipsecmod_enabled)
1164         else O_YNO(opt, "ipsecmod-ignore-bogus", ipsecmod_ignore_bogus)
1165         else O_STR(opt, "ipsecmod-hook", ipsecmod_hook)
1166         else O_DEC(opt, "ipsecmod-max-ttl", ipsecmod_max_ttl)
1167         else O_LST(opt, "ipsecmod-whitelist", ipsecmod_whitelist)
1168         else O_YNO(opt, "ipsecmod-strict", ipsecmod_strict)
1169 #endif
1170 #ifdef USE_CACHEDB
1171         else O_STR(opt, "backend", cachedb_backend)
1172         else O_STR(opt, "secret-seed", cachedb_secret)
1173 #ifdef USE_REDIS
1174         else O_STR(opt, "redis-server-host", redis_server_host)
1175         else O_DEC(opt, "redis-server-port", redis_server_port)
1176         else O_DEC(opt, "redis-timeout", redis_timeout)
1177         else O_YNO(opt, "redis-expire-records", redis_expire_records)
1178 #endif  /* USE_REDIS */
1179 #endif  /* USE_CACHEDB */
1180 #ifdef USE_IPSET
1181         else O_STR(opt, "name-v4", ipset_name_v4)
1182         else O_STR(opt, "name-v6", ipset_name_v6)
1183 #endif
1184         /* not here:
1185          * outgoing-permit, outgoing-avoid - have list of ports
1186          * local-zone - zones and nodefault variables
1187          * local-data - see below
1188          * local-data-ptr - converted to local-data entries
1189          * stub-zone, name, stub-addr, stub-host, stub-prime
1190          * forward-zone, name, forward-addr, forward-host
1191          */
1192         else return 0;
1193         return 1;
1194 }
1195
1196 /** initialize the global cfg_parser object */
1197 static void
1198 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
1199 {
1200         static struct config_parser_state st;
1201         cfg_parser = &st;
1202         cfg_parser->filename = filename;
1203         cfg_parser->line = 1;
1204         cfg_parser->errors = 0;
1205         cfg_parser->cfg = cfg;
1206         cfg_parser->chroot = chroot;
1207         init_cfg_parse();
1208 }
1209
1210 int
1211 config_read(struct config_file* cfg, const char* filename, const char* chroot)
1212 {
1213         FILE *in;
1214         char *fname = (char*)filename;
1215 #ifdef HAVE_GLOB
1216         glob_t g;
1217         size_t i;
1218         int r, flags;
1219 #endif
1220         if(!fname)
1221                 return 1;
1222
1223         /* check for wildcards */
1224 #ifdef HAVE_GLOB
1225         if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') &&
1226                 !strchr(fname, '{') && !strchr(fname, '~'))) {
1227                 verbose(VERB_QUERY, "wildcard found, processing %s", fname);
1228                 flags = 0
1229 #ifdef GLOB_ERR
1230                         | GLOB_ERR
1231 #endif
1232 #ifdef GLOB_NOSORT
1233                         | GLOB_NOSORT
1234 #endif
1235 #ifdef GLOB_BRACE
1236                         | GLOB_BRACE
1237 #endif
1238 #ifdef GLOB_TILDE
1239                         | GLOB_TILDE
1240 #endif
1241                 ;
1242                 memset(&g, 0, sizeof(g));
1243                 r = glob(fname, flags, NULL, &g);
1244                 if(r) {
1245                         /* some error */
1246                         globfree(&g);
1247                         if(r == GLOB_NOMATCH) {
1248                                 verbose(VERB_QUERY, "include: "
1249                                 "no matches for %s", fname);
1250                                 return 1;
1251                         } else if(r == GLOB_NOSPACE) {
1252                                 log_err("include: %s: "
1253                                         "fnametern out of memory", fname);
1254                         } else if(r == GLOB_ABORTED) {
1255                                 log_err("wildcard include: %s: expansion "
1256                                         "aborted (%s)", fname, strerror(errno));
1257                         } else {
1258                                 log_err("wildcard include: %s: expansion "
1259                                         "failed (%s)", fname, strerror(errno));
1260                         }
1261                         /* ignore globs that yield no files */
1262                         return 1;
1263                 }
1264                 /* process files found, if any */
1265                 for(i=0; i<(size_t)g.gl_pathc; i++) {
1266                         if(!config_read(cfg, g.gl_pathv[i], chroot)) {
1267                                 log_err("error reading wildcard "
1268                                         "include: %s", g.gl_pathv[i]);
1269                                 globfree(&g);
1270                                 return 0;
1271                         }
1272                 }
1273                 globfree(&g);
1274                 return 1;
1275         }
1276 #endif /* HAVE_GLOB */
1277
1278         in = fopen(fname, "r");
1279         if(!in) {
1280                 log_err("Could not open %s: %s", fname, strerror(errno));
1281                 return 0;
1282         }
1283         create_cfg_parser(cfg, fname, chroot);
1284         ub_c_in = in;
1285         ub_c_parse();
1286         fclose(in);
1287
1288         if(!cfg->dnscrypt) cfg->dnscrypt_port = 0;
1289
1290         if(cfg_parser->errors != 0) {
1291                 fprintf(stderr, "read %s failed: %d errors in configuration file\n",
1292                         fname, cfg_parser->errors);
1293                 errno=EINVAL;
1294                 return 0;
1295         }
1296
1297         return 1;
1298 }
1299
1300 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm)
1301 {
1302         struct config_stub* p = *(*pp);
1303         while(p) {
1304                 if(strcmp(p->name, nm) == 0)
1305                         return p;
1306                 (*pp) = &p->next;
1307                 p = p->next;
1308         }
1309         return NULL;
1310 }
1311
1312 void
1313 config_delstrlist(struct config_strlist* p)
1314 {
1315         struct config_strlist *np;
1316         while(p) {
1317                 np = p->next;
1318                 free(p->str);
1319                 free(p);
1320                 p = np;
1321         }
1322 }
1323
1324 void
1325 config_deldblstrlist(struct config_str2list* p)
1326 {
1327         struct config_str2list *np;
1328         while(p) {
1329                 np = p->next;
1330                 free(p->str);
1331                 free(p->str2);
1332                 free(p);
1333                 p = np;
1334         }
1335 }
1336
1337 void
1338 config_deltrplstrlist(struct config_str3list* p)
1339 {
1340         struct config_str3list *np;
1341         while(p) {
1342                 np = p->next;
1343                 free(p->str);
1344                 free(p->str2);
1345                 free(p->str3);
1346                 free(p);
1347                 p = np;
1348         }
1349 }
1350
1351 void
1352 config_delauth(struct config_auth* p)
1353 {
1354         if(!p) return;
1355         free(p->name);
1356         config_delstrlist(p->masters);
1357         config_delstrlist(p->urls);
1358         config_delstrlist(p->allow_notify);
1359         free(p->zonefile);
1360         free(p->rpz_taglist);
1361         free(p->rpz_action_override);
1362         free(p->rpz_cname);
1363         free(p->rpz_log_name);
1364         free(p);
1365 }
1366
1367 void
1368 config_delauths(struct config_auth* p)
1369 {
1370         struct config_auth* np;
1371         while(p) {
1372                 np = p->next;
1373                 config_delauth(p);
1374                 p = np;
1375         }
1376 }
1377
1378 void
1379 config_delstub(struct config_stub* p)
1380 {
1381         if(!p) return;
1382         free(p->name);
1383         config_delstrlist(p->hosts);
1384         config_delstrlist(p->addrs);
1385         free(p);
1386 }
1387
1388 void
1389 config_delstubs(struct config_stub* p)
1390 {
1391         struct config_stub* np;
1392         while(p) {
1393                 np = p->next;
1394                 config_delstub(p);
1395                 p = np;
1396         }
1397 }
1398
1399 void
1400 config_delview(struct config_view* p)
1401 {
1402         if(!p) return;
1403         free(p->name);
1404         config_deldblstrlist(p->local_zones);
1405         config_delstrlist(p->local_zones_nodefault);
1406 #ifdef USE_IPSET
1407         config_delstrlist(p->local_zones_ipset);
1408 #endif
1409         config_delstrlist(p->local_data);
1410         free(p);
1411 }
1412
1413 void
1414 config_delviews(struct config_view* p)
1415 {
1416         struct config_view* np;
1417         while(p) {
1418                 np = p->next;
1419                 config_delview(p);
1420                 p = np;
1421         }
1422 }
1423
1424 void
1425 config_del_strarray(char** array, int num)
1426 {
1427         int i;
1428         if(!array)
1429                 return;
1430         for(i=0; i<num; i++) {
1431                 free(array[i]);
1432         }
1433         free(array);
1434 }
1435
1436 void
1437 config_del_strbytelist(struct config_strbytelist* p)
1438 {
1439         struct config_strbytelist* np;
1440         while(p) {
1441                 np = p->next;
1442                 free(p->str);
1443                 free(p->str2);
1444                 free(p);
1445                 p = np;
1446         }
1447 }
1448
1449 void
1450 config_delete(struct config_file* cfg)
1451 {
1452         if(!cfg) return;
1453         free(cfg->username);
1454         free(cfg->chrootdir);
1455         free(cfg->directory);
1456         free(cfg->logfile);
1457         free(cfg->pidfile);
1458         free(cfg->target_fetch_policy);
1459         free(cfg->ssl_service_key);
1460         free(cfg->ssl_service_pem);
1461         free(cfg->tls_cert_bundle);
1462         config_delstrlist(cfg->tls_additional_port);
1463         config_delstrlist(cfg->tls_session_ticket_keys.first);
1464         free(cfg->tls_ciphers);
1465         free(cfg->tls_ciphersuites);
1466         free(cfg->http_endpoint);
1467         if(cfg->log_identity) {
1468                 log_ident_revert_to_default();
1469                 free(cfg->log_identity);
1470         }
1471         config_del_strarray(cfg->ifs, cfg->num_ifs);
1472         config_del_strarray(cfg->out_ifs, cfg->num_out_ifs);
1473         config_delstubs(cfg->stubs);
1474         config_delstubs(cfg->forwards);
1475         config_delauths(cfg->auths);
1476         config_delviews(cfg->views);
1477         config_delstrlist(cfg->donotqueryaddrs);
1478         config_delstrlist(cfg->root_hints);
1479 #ifdef CLIENT_SUBNET
1480         config_delstrlist(cfg->client_subnet);
1481         config_delstrlist(cfg->client_subnet_zone);
1482 #endif
1483         free(cfg->identity);
1484         free(cfg->version);
1485         free(cfg->module_conf);
1486         free(cfg->outgoing_avail_ports);
1487         config_delstrlist(cfg->caps_whitelist);
1488         config_delstrlist(cfg->private_address);
1489         config_delstrlist(cfg->private_domain);
1490         config_delstrlist(cfg->auto_trust_anchor_file_list);
1491         config_delstrlist(cfg->trust_anchor_file_list);
1492         config_delstrlist(cfg->trusted_keys_file_list);
1493         config_delstrlist(cfg->trust_anchor_list);
1494         config_delstrlist(cfg->domain_insecure);
1495         config_deldblstrlist(cfg->acls);
1496         config_deldblstrlist(cfg->tcp_connection_limits);
1497         free(cfg->val_nsec3_key_iterations);
1498         config_deldblstrlist(cfg->local_zones);
1499         config_delstrlist(cfg->local_zones_nodefault);
1500 #ifdef USE_IPSET
1501         config_delstrlist(cfg->local_zones_ipset);
1502 #endif
1503         config_delstrlist(cfg->local_data);
1504         config_deltrplstrlist(cfg->local_zone_overrides);
1505         config_del_strarray(cfg->tagname, cfg->num_tags);
1506         config_del_strbytelist(cfg->local_zone_tags);
1507         config_del_strbytelist(cfg->acl_tags);
1508         config_del_strbytelist(cfg->respip_tags);
1509         config_deltrplstrlist(cfg->acl_tag_actions);
1510         config_deltrplstrlist(cfg->acl_tag_datas);
1511         config_delstrlist(cfg->control_ifs.first);
1512         free(cfg->server_key_file);
1513         free(cfg->server_cert_file);
1514         free(cfg->control_key_file);
1515         free(cfg->control_cert_file);
1516         free(cfg->dns64_prefix);
1517         config_delstrlist(cfg->dns64_ignore_aaaa);
1518         free(cfg->dnstap_socket_path);
1519         free(cfg->dnstap_ip);
1520         free(cfg->dnstap_tls_server_name);
1521         free(cfg->dnstap_tls_cert_bundle);
1522         free(cfg->dnstap_tls_client_key_file);
1523         free(cfg->dnstap_tls_client_cert_file);
1524         free(cfg->dnstap_identity);
1525         free(cfg->dnstap_version);
1526         config_deldblstrlist(cfg->ratelimit_for_domain);
1527         config_deldblstrlist(cfg->ratelimit_below_domain);
1528         config_delstrlist(cfg->python_script);
1529         config_delstrlist(cfg->dynlib_file);
1530         config_deldblstrlist(cfg->edns_client_strings);
1531 #ifdef USE_IPSECMOD
1532         free(cfg->ipsecmod_hook);
1533         config_delstrlist(cfg->ipsecmod_whitelist);
1534 #endif
1535 #ifdef USE_CACHEDB
1536         free(cfg->cachedb_backend);
1537         free(cfg->cachedb_secret);
1538 #ifdef USE_REDIS
1539         free(cfg->redis_server_host);
1540 #endif  /* USE_REDIS */
1541 #endif  /* USE_CACHEDB */
1542 #ifdef USE_IPSET
1543         free(cfg->ipset_name_v4);
1544         free(cfg->ipset_name_v6);
1545 #endif
1546         free(cfg);
1547 }
1548
1549 static void
1550 init_outgoing_availports(int* a, int num)
1551 {
1552         /* generated with make iana_update */
1553         const int iana_assigned[] = {
1554 #include "util/iana_ports.inc"
1555                 -1 }; /* end marker to put behind trailing comma */
1556
1557         int i;
1558         /* do not use <1024, that could be trouble with the system, privs */
1559         for(i=1024; i<num; i++) {
1560                 a[i] = i;
1561         }
1562         /* create empty spot at 49152 to keep ephemeral ports available
1563          * to other programs */
1564         for(i=49152; i<49152+256; i++)
1565                 a[i] = 0;
1566         /* pick out all the IANA assigned ports */
1567         for(i=0; iana_assigned[i]!=-1; i++) {
1568                 if(iana_assigned[i] < num)
1569                         a[iana_assigned[i]] = 0;
1570         }
1571 }
1572
1573 int
1574 cfg_mark_ports(const char* str, int allow, int* avail, int num)
1575 {
1576         char* mid = strchr(str, '-');
1577 #ifdef DISABLE_EXPLICIT_PORT_RANDOMISATION
1578         log_warn("Explicit port randomisation disabled, ignoring "
1579                 "outgoing-port-permit and outgoing-port-avoid configuration "
1580                 "options");
1581 #endif
1582         if(!mid) {
1583                 int port = atoi(str);
1584                 if(port == 0 && strcmp(str, "0") != 0) {
1585                         log_err("cannot parse port number '%s'", str);
1586                         return 0;
1587                 }
1588                 if(port < num)
1589                         avail[port] = (allow?port:0);
1590         } else {
1591                 int i, low, high = atoi(mid+1);
1592                 char buf[16];
1593                 if(high == 0 && strcmp(mid+1, "0") != 0) {
1594                         log_err("cannot parse port number '%s'", mid+1);
1595                         return 0;
1596                 }
1597                 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) {
1598                         log_err("cannot parse port number '%s'", str);
1599                         return 0;
1600                 }
1601                 if(mid > str)
1602                         memcpy(buf, str, (size_t)(mid-str));
1603                 buf[mid-str] = 0;
1604                 low = atoi(buf);
1605                 if(low == 0 && strcmp(buf, "0") != 0) {
1606                         log_err("cannot parse port number '%s'", buf);
1607                         return 0;
1608                 }
1609                 for(i=low; i<=high; i++) {
1610                         if(i < num)
1611                                 avail[i] = (allow?i:0);
1612                 }
1613                 return 1;
1614         }
1615         return 1;
1616 }
1617
1618 int
1619 cfg_scan_ports(int* avail, int num)
1620 {
1621         int i;
1622         int count = 0;
1623         for(i=0; i<num; i++) {
1624                 if(avail[i])
1625                         count++;
1626         }
1627         return count;
1628 }
1629
1630 int cfg_condense_ports(struct config_file* cfg, int** avail)
1631 {
1632         int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536);
1633         int i, at = 0;
1634         *avail = NULL;
1635         if(num == 0)
1636                 return 0;
1637         *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int));
1638         if(!*avail)
1639                 return 0;
1640         for(i=0; i<65536; i++) {
1641                 if(cfg->outgoing_avail_ports[i])
1642                         (*avail)[at++] = cfg->outgoing_avail_ports[i];
1643         }
1644         log_assert(at == num);
1645         return num;
1646 }
1647
1648 /** print error with file and line number */
1649 static void ub_c_error_va_list(const char *fmt, va_list args)
1650 {
1651         cfg_parser->errors++;
1652         fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
1653         cfg_parser->line);
1654         vfprintf(stderr, fmt, args);
1655         fprintf(stderr, "\n");
1656 }
1657
1658 /** print error with file and line number */
1659 void ub_c_error_msg(const char* fmt, ...)
1660 {
1661         va_list args;
1662         va_start(args, fmt);
1663         ub_c_error_va_list(fmt, args);
1664         va_end(args);
1665 }
1666
1667 void ub_c_error(const char *str)
1668 {
1669         cfg_parser->errors++;
1670         fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
1671                 cfg_parser->line, str);
1672 }
1673
1674 int ub_c_wrap(void)
1675 {
1676         return 1;
1677 }
1678
1679 int cfg_strlist_append(struct config_strlist_head* list, char* item)
1680 {
1681         struct config_strlist *s;
1682         if(!item || !list) {
1683                 free(item);
1684                 return 0;
1685         }
1686         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1687         if(!s) {
1688                 free(item);
1689                 return 0;
1690         }
1691         s->str = item;
1692         s->next = NULL;
1693         if(list->last)
1694                 list->last->next = s;
1695         else
1696                 list->first = s;
1697         list->last = s;
1698         return 1;
1699 }
1700
1701 int
1702 cfg_region_strlist_insert(struct regional* region,
1703         struct config_strlist** head, char* item)
1704 {
1705         struct config_strlist *s;
1706         if(!item || !head)
1707                 return 0;
1708         s = (struct config_strlist*)regional_alloc_zero(region,
1709                 sizeof(struct config_strlist));
1710         if(!s)
1711                 return 0;
1712         s->str = item;
1713         s->next = *head;
1714         *head = s;
1715         return 1;
1716 }
1717
1718 struct config_strlist*
1719 cfg_strlist_find(struct config_strlist* head, const char *item)
1720 {
1721         struct config_strlist *s = head;
1722         if(!head){
1723                 return NULL;
1724         }
1725         while(s) {
1726                 if(strcmp(s->str, item) == 0) {
1727                         return s;
1728                 }
1729                 s = s->next;
1730         }
1731         return NULL;
1732 }
1733
1734 int
1735 cfg_strlist_insert(struct config_strlist** head, char* item)
1736 {
1737         struct config_strlist *s;
1738         if(!item || !head) {
1739                 free(item);
1740                 return 0;
1741         }
1742         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1743         if(!s) {
1744                 free(item);
1745                 return 0;
1746         }
1747         s->str = item;
1748         s->next = *head;
1749         *head = s;
1750         return 1;
1751 }
1752
1753 int
1754 cfg_strlist_append_ex(struct config_strlist** head, char* item)
1755 {
1756         struct config_strlist *s;
1757         if(!item || !head)
1758                 return 0;
1759         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1760         if(!s)
1761                 return 0;
1762         s->str = item;
1763         s->next = NULL;
1764
1765         if (*head==NULL) {
1766                 *head = s;
1767         } else {
1768                 struct config_strlist *last = *head;
1769                 while (last->next!=NULL) {
1770                     last = last->next;
1771                 }
1772                 last->next = s;
1773         }
1774
1775         return 1;
1776 }
1777
1778 int
1779 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
1780 {
1781         struct config_str2list *s;
1782         if(!item || !i2 || !head) {
1783                 free(item);
1784                 free(i2);
1785                 return 0;
1786         }
1787         s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
1788         if(!s) {
1789                 free(item);
1790                 free(i2);
1791                 return 0;
1792         }
1793         s->str = item;
1794         s->str2 = i2;
1795         s->next = *head;
1796         *head = s;
1797         return 1;
1798 }
1799
1800 int
1801 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2,
1802         char* i3)
1803 {
1804         struct config_str3list *s;
1805         if(!item || !i2 || !i3 || !head)
1806                 return 0;
1807         s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list));
1808         if(!s)
1809                 return 0;
1810         s->str = item;
1811         s->str2 = i2;
1812         s->str3 = i3;
1813         s->next = *head;
1814         *head = s;
1815         return 1;
1816 }
1817
1818 int
1819 cfg_strbytelist_insert(struct config_strbytelist** head, char* item,
1820         uint8_t* i2, size_t i2len)
1821 {
1822         struct config_strbytelist* s;
1823         if(!item || !i2 || !head)
1824                 return 0;
1825         s = (struct config_strbytelist*)calloc(1, sizeof(*s));
1826         if(!s)
1827                 return 0;
1828         s->str = item;
1829         s->str2 = i2;
1830         s->str2len = i2len;
1831         s->next = *head;
1832         *head = s;
1833         return 1;
1834 }
1835
1836 time_t
1837 cfg_convert_timeval(const char* str)
1838 {
1839         time_t t;
1840         struct tm tm;
1841         memset(&tm, 0, sizeof(tm));
1842         if(strlen(str) < 14)
1843                 return 0;
1844         if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
1845                 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
1846                 return 0;
1847         tm.tm_year -= 1900;
1848         tm.tm_mon--;
1849         /* Check values */
1850         if (tm.tm_year < 70)    return 0;
1851         if (tm.tm_mon < 0 || tm.tm_mon > 11)    return 0;
1852         if (tm.tm_mday < 1 || tm.tm_mday > 31)  return 0;
1853         if (tm.tm_hour < 0 || tm.tm_hour > 23)  return 0;
1854         if (tm.tm_min < 0 || tm.tm_min > 59)    return 0;
1855         if (tm.tm_sec < 0 || tm.tm_sec > 59)    return 0;
1856         /* call ldns conversion function */
1857         t = sldns_mktime_from_utc(&tm);
1858         return t;
1859 }
1860
1861 int
1862 cfg_count_numbers(const char* s)
1863 {
1864         /* format ::= (sp num)+ sp  */
1865         /* num ::= [-](0-9)+        */
1866         /* sp ::= (space|tab)*      */
1867         int num = 0;
1868         while(*s) {
1869                 while(*s && isspace((unsigned char)*s))
1870                         s++;
1871                 if(!*s) /* end of string */
1872                         break;
1873                 if(*s == '-')
1874                         s++;
1875                 if(!*s) /* only - not allowed */
1876                         return 0;
1877                 if(!isdigit((unsigned char)*s)) /* bad character */
1878                         return 0;
1879                 while(*s && isdigit((unsigned char)*s))
1880                         s++;
1881                 num++;
1882         }
1883         return num;
1884 }
1885
1886 /** all digit number */
1887 static int isalldigit(const char* str, size_t l)
1888 {
1889         size_t i;
1890         for(i=0; i<l; i++)
1891                 if(!isdigit((unsigned char)str[i]))
1892                         return 0;
1893         return 1;
1894 }
1895
1896 int
1897 cfg_parse_memsize(const char* str, size_t* res)
1898 {
1899         size_t len;
1900         size_t mult = 1;
1901         if(!str || (len=(size_t)strlen(str)) == 0) {
1902                 log_err("not a size: '%s'", str);
1903                 return 0;
1904         }
1905         if(isalldigit(str, len)) {
1906                 *res = (size_t)atol(str);
1907                 return 1;
1908         }
1909         /* check appended num */
1910         while(len>0 && str[len-1]==' ')
1911                 len--;
1912         if(len > 1 && str[len-1] == 'b')
1913                 len--;
1914         else if(len > 1 && str[len-1] == 'B')
1915                 len--;
1916
1917         if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
1918                 mult = 1024*1024*1024;
1919         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
1920                 mult = 1024*1024;
1921         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k')
1922                 mult = 1024;
1923         else if(len > 0 && isdigit((unsigned char)str[len-1]))
1924                 mult = 1;
1925         else {
1926                 log_err("unknown size specifier: '%s'", str);
1927                 return 0;
1928         }
1929         while(len>1 && str[len-2]==' ')
1930                 len--;
1931
1932         if(!isalldigit(str, len-1)) {
1933                 log_err("unknown size specifier: '%s'", str);
1934                 return 0;
1935         }
1936         *res = ((size_t)atol(str)) * mult;
1937         return 1;
1938 }
1939
1940 int
1941 find_tag_id(struct config_file* cfg, const char* tag)
1942 {
1943         int i;
1944         for(i=0; i<cfg->num_tags; i++) {
1945                 if(strcmp(cfg->tagname[i], tag) == 0)
1946                         return i;
1947         }
1948         return -1;
1949 }
1950
1951 int
1952 config_add_tag(struct config_file* cfg, const char* tag)
1953 {
1954         char** newarray;
1955         char* newtag;
1956         if(find_tag_id(cfg, tag) != -1)
1957                 return 1; /* nothing to do */
1958         newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1));
1959         if(!newarray)
1960                 return 0;
1961         newtag = strdup(tag);
1962         if(!newtag) {
1963                 free(newarray);
1964                 return 0;
1965         }
1966         if(cfg->tagname) {
1967                 memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags);
1968                 free(cfg->tagname);
1969         }
1970         newarray[cfg->num_tags++] = newtag;
1971         cfg->tagname = newarray;
1972         return 1;
1973 }
1974
1975 /** set a bit in a bit array */
1976 static void
1977 cfg_set_bit(uint8_t* bitlist, size_t len, int id)
1978 {
1979         int pos = id/8;
1980         log_assert((size_t)pos < len);
1981         (void)len;
1982         bitlist[pos] |= 1<<(id%8);
1983 }
1984
1985 uint8_t* config_parse_taglist(struct config_file* cfg, char* str,
1986         size_t* listlen)
1987 {
1988         uint8_t* taglist = NULL;
1989         size_t len = 0;
1990         char* p, *s;
1991
1992         /* allocate */
1993         if(cfg->num_tags == 0) {
1994                 log_err("parse taglist, but no tags defined");
1995                 return 0;
1996         }
1997         len = (size_t)(cfg->num_tags+7)/8;
1998         taglist = calloc(1, len);
1999         if(!taglist) {
2000                 log_err("out of memory");
2001                 return 0;
2002         }
2003
2004         /* parse */
2005         s = str;
2006         while((p=strsep(&s, " \t\n")) != NULL) {
2007                 if(*p) {
2008                         int id = find_tag_id(cfg, p);
2009                         /* set this bit in the bitlist */
2010                         if(id == -1) {
2011                                 log_err("unknown tag: %s", p);
2012                                 free(taglist);
2013                                 return 0;
2014                         }
2015                         cfg_set_bit(taglist, len, id);
2016                 }
2017         }
2018
2019         *listlen = len;
2020         return taglist;
2021 }
2022
2023 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist,
2024         size_t taglen)
2025 {
2026         char buf[10240];
2027         size_t i, j, len = 0;
2028         buf[0] = 0;
2029         for(i=0; i<taglen; i++) {
2030                 if(taglist[i] == 0)
2031                         continue;
2032                 for(j=0; j<8; j++) {
2033                         if((taglist[i] & (1<<j)) != 0) {
2034                                 size_t id = i*8 + j;
2035                                 snprintf(buf+len, sizeof(buf)-len, "%s%s",
2036                                         (len==0?"":" "), cfg->tagname[id]);
2037                                 len += strlen(buf+len);
2038                         }
2039                 }
2040         }
2041         return strdup(buf);
2042 }
2043
2044 int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2,
2045         size_t list2len)
2046 {
2047         size_t i;
2048         if(!list1 || !list2)
2049                 return 0;
2050         for(i=0; i<list1len && i<list2len; i++) {
2051                 if((list1[i] & list2[i]) != 0)
2052                         return 1;
2053         }
2054         return 0;
2055 }
2056
2057 void
2058 config_apply(struct config_file* config)
2059 {
2060         MAX_TTL = (time_t)config->max_ttl;
2061         MIN_TTL = (time_t)config->min_ttl;
2062         SERVE_EXPIRED = config->serve_expired;
2063         SERVE_EXPIRED_TTL = (time_t)config->serve_expired_ttl;
2064         SERVE_EXPIRED_REPLY_TTL = (time_t)config->serve_expired_reply_ttl;
2065         MAX_NEG_TTL = (time_t)config->max_negative_ttl;
2066         RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
2067         EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
2068         MINIMAL_RESPONSES = config->minimal_responses;
2069         RRSET_ROUNDROBIN = config->rrset_roundrobin;
2070         LOG_TAG_QUERYREPLY = config->log_tag_queryreply;
2071         UNKNOWN_SERVER_NICENESS = config->unknown_server_time_limit;
2072         log_set_time_asc(config->log_time_ascii);
2073         autr_permit_small_holddown = config->permit_small_holddown;
2074         stream_wait_max = config->stream_wait_size;
2075         http2_query_buffer_max = config->http_query_buffer_size;
2076         http2_response_buffer_max = config->http_response_buffer_size;
2077 }
2078
2079 void config_lookup_uid(struct config_file* cfg)
2080 {
2081 #ifdef HAVE_GETPWNAM
2082         /* translate username into uid and gid */
2083         if(cfg->username && cfg->username[0]) {
2084                 struct passwd *pwd;
2085                 if((pwd = getpwnam(cfg->username)) != NULL) {
2086                         cfg_uid = pwd->pw_uid;
2087                         cfg_gid = pwd->pw_gid;
2088                 }
2089         }
2090 #else
2091         (void)cfg;
2092 #endif
2093 }
2094
2095 /**
2096  * Calculate string length of full pathname in original filesys
2097  * @param fname: the path name to convert.
2098  *      Must not be null or empty.
2099  * @param cfg: config struct for chroot and chdir (if set).
2100  * @param use_chdir: if false, only chroot is applied.
2101  * @return length of string.
2102  *      remember to allocate one more for 0 at end in mallocs.
2103  */
2104 static size_t
2105 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2106 {
2107         size_t len = 0;
2108         int slashit = 0;
2109         if(cfg->chrootdir && cfg->chrootdir[0] &&
2110                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2111                 /* already full pathname, return it */
2112                 return strlen(fname);
2113         }
2114         /* chroot */
2115         if(cfg->chrootdir && cfg->chrootdir[0]) {
2116                 /* start with chrootdir */
2117                 len += strlen(cfg->chrootdir);
2118                 slashit = 1;
2119         }
2120         /* chdir */
2121 #ifdef UB_ON_WINDOWS
2122         if(fname[0] != 0 && fname[1] == ':') {
2123                 /* full path, no chdir */
2124         } else
2125 #endif
2126         if(fname[0] == '/' || !use_chdir) {
2127                 /* full path, no chdir */
2128         } else if(cfg->directory && cfg->directory[0]) {
2129                 /* prepend chdir */
2130                 if(slashit && cfg->directory[0] != '/')
2131                         len++;
2132                 if(cfg->chrootdir && cfg->chrootdir[0] &&
2133                         strncmp(cfg->chrootdir, cfg->directory,
2134                         strlen(cfg->chrootdir)) == 0)
2135                         len += strlen(cfg->directory)-strlen(cfg->chrootdir);
2136                 else    len += strlen(cfg->directory);
2137                 slashit = 1;
2138         }
2139         /* fname */
2140         if(slashit && fname[0] != '/')
2141                 len++;
2142         len += strlen(fname);
2143         return len;
2144 }
2145
2146 char*
2147 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2148 {
2149         size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1;
2150         int slashit = 0;
2151         char* buf = (char*)malloc(len);
2152         if(!buf)
2153                 return NULL;
2154         buf[0] = 0;
2155         /* is fname already in chroot ? */
2156         if(cfg->chrootdir && cfg->chrootdir[0] &&
2157                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2158                 /* already full pathname, return it */
2159                 (void)strlcpy(buf, fname, len);
2160                 buf[len-1] = 0;
2161                 return buf;
2162         }
2163         /* chroot */
2164         if(cfg->chrootdir && cfg->chrootdir[0]) {
2165                 /* start with chrootdir */
2166                 (void)strlcpy(buf, cfg->chrootdir, len);
2167                 slashit = 1;
2168         }
2169 #ifdef UB_ON_WINDOWS
2170         if(fname[0] != 0 && fname[1] == ':') {
2171                 /* full path, no chdir */
2172         } else
2173 #endif
2174         /* chdir */
2175         if(fname[0] == '/' || !use_chdir) {
2176                 /* full path, no chdir */
2177         } else if(cfg->directory && cfg->directory[0]) {
2178                 /* prepend chdir */
2179                 if(slashit && cfg->directory[0] != '/')
2180                         (void)strlcat(buf, "/", len);
2181                 /* is the directory already in the chroot? */
2182                 if(cfg->chrootdir && cfg->chrootdir[0] &&
2183                         strncmp(cfg->chrootdir, cfg->directory,
2184                         strlen(cfg->chrootdir)) == 0)
2185                         (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
2186                                    len);
2187                 else (void)strlcat(buf, cfg->directory, len);
2188                 slashit = 1;
2189         }
2190         /* fname */
2191         if(slashit && fname[0] != '/')
2192                 (void)strlcat(buf, "/", len);
2193         (void)strlcat(buf, fname, len);
2194         buf[len-1] = 0;
2195         return buf;
2196 }
2197
2198 /** return next space character in string */
2199 static char* next_space_pos(const char* str)
2200 {
2201         char* sp = strchr(str, ' ');
2202         char* tab = strchr(str, '\t');
2203         if(!tab && !sp)
2204                 return NULL;
2205         if(!sp) return tab;
2206         if(!tab) return sp;
2207         return (sp<tab)?sp:tab;
2208 }
2209
2210 /** return last space character in string */
2211 static char* last_space_pos(const char* str)
2212 {
2213         char* sp = strrchr(str, ' ');
2214         char* tab = strrchr(str, '\t');
2215         if(!tab && !sp)
2216                 return NULL;
2217         if(!sp) return tab;
2218         if(!tab) return sp;
2219         return (sp>tab)?sp:tab;
2220 }
2221
2222 int
2223 cfg_parse_local_zone(struct config_file* cfg, const char* val)
2224 {
2225         const char *type, *name_end, *name;
2226         char buf[256];
2227
2228         /* parse it as: [zone_name] [between stuff] [zone_type] */
2229         name = val;
2230         while(*name && isspace((unsigned char)*name))
2231                 name++;
2232         if(!*name) {
2233                 log_err("syntax error: too short: %s", val);
2234                 return 0;
2235         }
2236         name_end = next_space_pos(name);
2237         if(!name_end || !*name_end) {
2238                 log_err("syntax error: expected zone type: %s", val);
2239                 return 0;
2240         }
2241         if (name_end - name > 255) {
2242                 log_err("syntax error: bad zone name: %s", val);
2243                 return 0;
2244         }
2245         (void)strlcpy(buf, name, sizeof(buf));
2246         buf[name_end-name] = '\0';
2247
2248         type = last_space_pos(name_end);
2249         while(type && *type && isspace((unsigned char)*type))
2250                 type++;
2251         if(!type || !*type) {
2252                 log_err("syntax error: expected zone type: %s", val);
2253                 return 0;
2254         }
2255
2256         if(strcmp(type, "nodefault")==0) {
2257                 return cfg_strlist_insert(&cfg->local_zones_nodefault,
2258                         strdup(name));
2259 #ifdef USE_IPSET
2260         } else if(strcmp(type, "ipset")==0) {
2261                 return cfg_strlist_insert(&cfg->local_zones_ipset,
2262                         strdup(name));
2263 #endif
2264         } else {
2265                 return cfg_str2list_insert(&cfg->local_zones, strdup(buf),
2266                         strdup(type));
2267         }
2268 }
2269
2270 char* cfg_ptr_reverse(char* str)
2271 {
2272         char* ip, *ip_end;
2273         char* name;
2274         char* result;
2275         char buf[1024];
2276         struct sockaddr_storage addr;
2277         socklen_t addrlen;
2278
2279         /* parse it as: [IP] [between stuff] [name] */
2280         ip = str;
2281         while(*ip && isspace((unsigned char)*ip))
2282                 ip++;
2283         if(!*ip) {
2284                 log_err("syntax error: too short: %s", str);
2285                 return NULL;
2286         }
2287         ip_end = next_space_pos(ip);
2288         if(!ip_end || !*ip_end) {
2289                 log_err("syntax error: expected name: %s", str);
2290                 return NULL;
2291         }
2292
2293         name = last_space_pos(ip_end);
2294         if(!name || !*name) {
2295                 log_err("syntax error: expected name: %s", str);
2296                 return NULL;
2297         }
2298
2299         sscanf(ip, "%100s", buf);
2300         buf[sizeof(buf)-1]=0;
2301
2302         if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) {
2303                 log_err("syntax error: cannot parse address: %s", str);
2304                 return NULL;
2305         }
2306
2307         /* reverse IPv4:
2308          * ddd.ddd.ddd.ddd.in-addr-arpa.
2309          * IPv6: (h.){32}.ip6.arpa.  */
2310
2311         if(addr_is_ip6(&addr, addrlen)) {
2312                 uint8_t ad[16];
2313                 const char* hex = "0123456789abcdef";
2314                 char *p = buf;
2315                 int i;
2316                 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
2317                         sizeof(ad));
2318                 for(i=15; i>=0; i--) {
2319                         uint8_t b = ad[i];
2320                         *p++ = hex[ (b&0x0f) ];
2321                         *p++ = '.';
2322                         *p++ = hex[ (b&0xf0) >> 4 ];
2323                         *p++ = '.';
2324                 }
2325                 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
2326         } else {
2327                 uint8_t ad[4];
2328                 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
2329                         sizeof(ad));
2330                 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
2331                         (unsigned)ad[3], (unsigned)ad[2],
2332                         (unsigned)ad[1], (unsigned)ad[0]);
2333         }
2334
2335         /* printed the reverse address, now the between goop and name on end */
2336         while(*ip_end && isspace((unsigned char)*ip_end))
2337                 ip_end++;
2338         if(name>ip_end) {
2339                 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s",
2340                         (int)(name-ip_end), ip_end);
2341         }
2342         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name);
2343
2344         result = strdup(buf);
2345         if(!result) {
2346                 log_err("out of memory parsing %s", str);
2347                 return NULL;
2348         }
2349         return result;
2350 }
2351
2352 #ifdef UB_ON_WINDOWS
2353 char*
2354 w_lookup_reg_str(const char* key, const char* name)
2355 {
2356         HKEY hk = NULL;
2357         DWORD type = 0;
2358         BYTE buf[1024];
2359         DWORD len = (DWORD)sizeof(buf);
2360         LONG ret;
2361         char* result = NULL;
2362         ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
2363         if(ret == ERROR_FILE_NOT_FOUND)
2364                 return NULL; /* key does not exist */
2365         else if(ret != ERROR_SUCCESS) {
2366                 log_err("RegOpenKeyEx failed");
2367                 return NULL;
2368         }
2369         ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
2370         if(RegCloseKey(hk))
2371                 log_err("RegCloseKey");
2372         if(ret == ERROR_FILE_NOT_FOUND)
2373                 return NULL; /* name does not exist */
2374         else if(ret != ERROR_SUCCESS) {
2375                 log_err("RegQueryValueEx failed");
2376                 return NULL;
2377         }
2378         if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
2379                 buf[sizeof(buf)-1] = 0;
2380                 buf[sizeof(buf)-2] = 0; /* for multi_sz */
2381                 result = strdup((char*)buf);
2382                 if(!result) log_err("out of memory");
2383         }
2384         return result;
2385 }
2386
2387 void w_config_adjust_directory(struct config_file* cfg)
2388 {
2389         if(cfg->directory && cfg->directory[0]) {
2390                 TCHAR dirbuf[2*MAX_PATH+4];
2391                 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) {
2392                         /* get executable path, and if that contains
2393                          * directories, snip off the filename part */
2394                         dirbuf[0] = 0;
2395                         if(!GetModuleFileName(NULL, dirbuf, MAX_PATH))
2396                                 log_err("could not GetModuleFileName");
2397                         if(strrchr(dirbuf, '\\')) {
2398                                 (strrchr(dirbuf, '\\'))[0] = 0;
2399                         } else log_err("GetModuleFileName had no path");
2400                         if(dirbuf[0]) {
2401                                 /* adjust directory for later lookups to work*/
2402                                 free(cfg->directory);
2403                                 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1);
2404                         }
2405                 }
2406         }
2407 }
2408 #endif /* UB_ON_WINDOWS */
2409
2410 void errinf(struct module_qstate* qstate, const char* str)
2411 {
2412         struct config_strlist* p;
2413         if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str)
2414                 return;
2415         p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p));
2416         if(!p) {
2417                 log_err("malloc failure in validator-error-info string");
2418                 return;
2419         }
2420         p->next = NULL;
2421         p->str = regional_strdup(qstate->region, str);
2422         if(!p->str) {
2423                 log_err("malloc failure in validator-error-info string");
2424                 return;
2425         }
2426         /* add at end */
2427         if(qstate->errinf) {
2428                 struct config_strlist* q = qstate->errinf;
2429                 while(q->next)
2430                         q = q->next;
2431                 q->next = p;
2432         } else  qstate->errinf = p;
2433 }
2434
2435 void errinf_origin(struct module_qstate* qstate, struct sock_list *origin)
2436 {
2437         struct sock_list* p;
2438         if(qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail)
2439                 return;
2440         for(p=origin; p; p=p->next) {
2441                 char buf[256];
2442                 if(p == origin)
2443                         snprintf(buf, sizeof(buf), "from ");
2444                 else    snprintf(buf, sizeof(buf), "and ");
2445                 if(p->len == 0)
2446                         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf),
2447                                 "cache");
2448                 else
2449                         addr_to_str(&p->addr, p->len, buf+strlen(buf),
2450                                 sizeof(buf)-strlen(buf));
2451                 errinf(qstate, buf);
2452         }
2453 }
2454
2455 char* errinf_to_str_bogus(struct module_qstate* qstate)
2456 {
2457         char buf[20480];
2458         char* p = buf;
2459         size_t left = sizeof(buf);
2460         struct config_strlist* s;
2461         char dname[LDNS_MAX_DOMAINLEN+1];
2462         char t[16], c[16];
2463         sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t));
2464         sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c));
2465         dname_str(qstate->qinfo.qname, dname);
2466         snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c);
2467         left -= strlen(p); p += strlen(p);
2468         if(!qstate->errinf)
2469                 snprintf(p, left, " misc failure");
2470         else for(s=qstate->errinf; s; s=s->next) {
2471                 snprintf(p, left, " %s", s->str);
2472                 left -= strlen(p); p += strlen(p);
2473         }
2474         p = strdup(buf);
2475         if(!p)
2476                 log_err("malloc failure in errinf_to_str");
2477         return p;
2478 }
2479
2480 char* errinf_to_str_servfail(struct module_qstate* qstate)
2481 {
2482         char buf[20480];
2483         char* p = buf;
2484         size_t left = sizeof(buf);
2485         struct config_strlist* s;
2486         char dname[LDNS_MAX_DOMAINLEN+1];
2487         char t[16], c[16];
2488         sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t));
2489         sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c));
2490         dname_str(qstate->qinfo.qname, dname);
2491         snprintf(p, left, "SERVFAIL <%s %s %s>:", dname, t, c);
2492         left -= strlen(p); p += strlen(p);
2493         if(!qstate->errinf)
2494                 snprintf(p, left, " misc failure");
2495         else for(s=qstate->errinf; s; s=s->next) {
2496                 snprintf(p, left, " %s", s->str);
2497                 left -= strlen(p); p += strlen(p);
2498         }
2499         p = strdup(buf);
2500         if(!p)
2501                 log_err("malloc failure in errinf_to_str");
2502         return p;
2503 }
2504
2505 void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr)
2506 {
2507         char buf[1024];
2508         char dname[LDNS_MAX_DOMAINLEN+1];
2509         char t[16], c[16];
2510         if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !rr)
2511                 return;
2512         sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t));
2513         sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c));
2514         dname_str(rr->rk.dname, dname);
2515         snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c);
2516         errinf(qstate, buf);
2517 }
2518
2519 void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname)
2520 {
2521         char b[1024];
2522         char buf[LDNS_MAX_DOMAINLEN+1];
2523         if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str || !dname)
2524                 return;
2525         dname_str(dname, buf);
2526         snprintf(b, sizeof(b), "%s %s", str, buf);
2527         errinf(qstate, b);
2528 }
2529
2530 int options_remote_is_address(struct config_file* cfg)
2531 {
2532         if(!cfg->remote_control_enable) return 0;
2533         if(!cfg->control_ifs.first) return 1;
2534         if(!cfg->control_ifs.first->str) return 1;
2535         if(cfg->control_ifs.first->str[0] == 0) return 1;
2536         return (cfg->control_ifs.first->str[0] != '/');
2537 }
2538