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 "util/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/random.h"
  59 #include "util/rtt.h"
  60 #include "services/cache/infra.h"
  61 #include "sldns/wire2str.h"
  62 #include "sldns/parseutil.h"
  63 #include "iterator/iterator.h"
  64 #ifdef HAVE_GLOB_H
  65 # include <glob.h>
  66 #endif
  67 #ifdef CLIENT_SUBNET
  68 #include "edns-subnet/edns-subnet.h"
  69 #endif
  70 #ifdef HAVE_PWD_H
  71 #include <pwd.h>
  72 #endif
  73
  74 /** from cfg username, after daemonize setup performed */
  75 uid_t cfg_uid = (uid_t)-1;
  76 /** from cfg username, after daemonize setup performed */
  77 gid_t cfg_gid = (gid_t)-1;
  78 /** for debug allow small timeout values for fast rollovers */
  79 int autr_permit_small_holddown = 0;
  80 /** size (in bytes) of stream wait buffers max */
  81 size_t stream_wait_max = 4 * 1024 * 1024;
  82 size_t http2_query_buffer_max = 4 * 1024 * 1024;
  83 size_t http2_response_buffer_max = 4 * 1024 * 1024;
  84
  85 /** global config during parsing */
  86 struct config_parser_state* cfg_parser = 0;
  87
  88 /** init ports possible for use */
  89 static void init_outgoing_availports(int* array, int num);
  90
  91 /** init cookie with random data */
  92 static void init_cookie_secret(uint8_t* cookie_secret, size_t cookie_secret_len);
  93
  94 struct config_file*
  95 config_create(void)
  96 {
  97         struct config_file* cfg;
  98         cfg = (struct config_file*)calloc(1, sizeof(struct config_file));
  99         if(!cfg)
 100                 return NULL;
 101         /* the defaults if no config is present */
 102         cfg->verbosity = 1;
 103         cfg->stat_interval = 0;
 104         cfg->stat_cumulative = 0;
 105         cfg->stat_extended = 0;
 106         cfg->stat_inhibit_zero = 1;
 107         cfg->num_threads = 1;
 108         cfg->port = UNBOUND_DNS_PORT;
 109         cfg->do_ip4 = 1;
 110         cfg->do_ip6 = 1;
 111         cfg->do_udp = 1;
 112         cfg->do_tcp = 1;
 113         cfg->tcp_reuse_timeout = 60 * 1000; /* 60s in milisecs */
 114         cfg->max_reuse_tcp_queries = 200;
 115         cfg->tcp_upstream = 0;
 116         cfg->udp_upstream_without_downstream = 0;
 117         cfg->tcp_mss = 0;
 118         cfg->outgoing_tcp_mss = 0;
 119         cfg->tcp_idle_timeout = 30 * 1000; /* 30s in millisecs */
 120         cfg->tcp_auth_query_timeout = 3 * 1000; /* 3s in millisecs */
 121         cfg->do_tcp_keepalive = 0;
 122         cfg->tcp_keepalive_timeout = 120 * 1000; /* 120s in millisecs */
 123         cfg->sock_queue_timeout = 0; /* do not check timeout */
 124         cfg->ssl_service_key = NULL;
 125         cfg->ssl_service_pem = NULL;
 126         cfg->ssl_port = UNBOUND_DNS_OVER_TLS_PORT;
 127         cfg->ssl_upstream = 0;
 128         cfg->tls_cert_bundle = NULL;
 129         cfg->tls_win_cert = 0;
 130         cfg->tls_use_sni = 1;
 131         cfg->https_port = UNBOUND_DNS_OVER_HTTPS_PORT;
 132         if(!(cfg->http_endpoint = strdup("/dns-query"))) goto error_exit;
 133         cfg->http_max_streams = 100;
 134         cfg->http_query_buffer_size = 4*1024*1024;
 135         cfg->http_response_buffer_size = 4*1024*1024;
 136         cfg->http_nodelay = 1;
 137         cfg->use_syslog = 1;
 138         cfg->log_identity = NULL; /* changed later with argv[0] */
 139         cfg->log_time_ascii = 0;
 140         cfg->log_queries = 0;
 141         cfg->log_replies = 0;
 142         cfg->log_tag_queryreply = 0;
 143         cfg->log_local_actions = 0;
 144         cfg->log_servfail = 0;
 145 #ifndef USE_WINSOCK
 146 #  ifdef USE_MINI_EVENT
 147         /* select max 1024 sockets */
 148         cfg->outgoing_num_ports = 960;
 149         cfg->num_queries_per_thread = 512;
 150 #  else
 151         /* libevent can use many sockets */
 152         cfg->outgoing_num_ports = 4096;
 153         cfg->num_queries_per_thread = 1024;
 154 #  endif
 155         cfg->outgoing_num_tcp = 10;
 156         cfg->incoming_num_tcp = 10;
 157 #else
 158         cfg->outgoing_num_ports = 48; /* windows is limited in num fds */
 159         cfg->num_queries_per_thread = 24;
 160         cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */
 161         cfg->incoming_num_tcp = 2;
 162 #endif
 163         cfg->stream_wait_size = 4 * 1024 * 1024;
 164         cfg->edns_buffer_size = 1232; /* from DNS flagday recommendation */
 165         cfg->msg_buffer_size = 65552; /* 64 k + a small margin */
 166         cfg->msg_cache_size = 4 * 1024 * 1024;
 167         cfg->msg_cache_slabs = 4;
 168         cfg->jostle_time = 200;
 169         cfg->rrset_cache_size = 4 * 1024 * 1024;
 170         cfg->rrset_cache_slabs = 4;
 171         cfg->host_ttl = 900;
 172         cfg->bogus_ttl = 60;
 173         cfg->min_ttl = 0;
 174         cfg->max_ttl = 3600 * 24;
 175         cfg->max_negative_ttl = 3600;
 176         cfg->prefetch = 0;
 177         cfg->prefetch_key = 0;
 178         cfg->deny_any = 0;
 179         cfg->infra_cache_slabs = 4;
 180         cfg->infra_cache_numhosts = 10000;
 181         cfg->infra_cache_min_rtt = 50;
 182         cfg->infra_cache_max_rtt = 120000;
 183         cfg->infra_keep_probing = 0;
 184         cfg->delay_close = 0;
 185         cfg->udp_connect = 1;
 186         if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int))))
 187                 goto error_exit;
 188         init_outgoing_availports(cfg->outgoing_avail_ports, 65536);
 189         if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit;
 190 #ifdef HAVE_CHROOT
 191         if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit;
 192 #endif
 193         if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit;
 194         if(!(cfg->logfile = strdup(""))) goto error_exit;
 195         if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit;
 196         if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit;
 197         cfg->fast_server_permil = 0;
 198         cfg->fast_server_num = 3;
 199         cfg->donotqueryaddrs = NULL;
 200         cfg->donotquery_localhost = 1;
 201         cfg->root_hints = NULL;
 202         cfg->use_systemd = 0;
 203         cfg->do_daemonize = 1;
 204         cfg->if_automatic = 0;
 205         cfg->if_automatic_ports = NULL;
 206         cfg->so_rcvbuf = 0;
 207         cfg->so_sndbuf = 0;
 208         cfg->so_reuseport = REUSEPORT_DEFAULT;
 209         cfg->ip_transparent = 0;
 210         cfg->ip_freebind = 0;
 211         cfg->ip_dscp = 0;
 212         cfg->num_ifs = 0;
 213         cfg->ifs = NULL;
 214         cfg->num_out_ifs = 0;
 215         cfg->out_ifs = NULL;
 216         cfg->stubs = NULL;
 217         cfg->forwards = NULL;
 218         cfg->auths = NULL;
 219 #ifdef CLIENT_SUBNET
 220         cfg->client_subnet = NULL;
 221         cfg->client_subnet_zone = NULL;
 222         cfg->client_subnet_opcode = LDNS_EDNS_CLIENT_SUBNET;
 223         cfg->client_subnet_always_forward = 0;
 224         cfg->max_client_subnet_ipv4 = 24;
 225         cfg->max_client_subnet_ipv6 = 56;
 226         cfg->min_client_subnet_ipv4 = 0;
 227         cfg->min_client_subnet_ipv6 = 0;
 228         cfg->max_ecs_tree_size_ipv4 = 100;
 229         cfg->max_ecs_tree_size_ipv6 = 100;
 230 #endif
 231         cfg->views = NULL;
 232         cfg->acls = NULL;
 233         cfg->tcp_connection_limits = NULL;
 234         cfg->harden_short_bufsize = 1;
 235         cfg->harden_large_queries = 0;
 236         cfg->harden_glue = 1;
 237         cfg->harden_dnssec_stripped = 1;
 238         cfg->harden_below_nxdomain = 1;
 239         cfg->harden_referral_path = 0;
 240         cfg->harden_algo_downgrade = 0;
 241         cfg->harden_unknown_additional = 0;
 242         cfg->use_caps_bits_for_id = 0;
 243         cfg->caps_whitelist = NULL;
 244         cfg->private_address = NULL;
 245         cfg->private_domain = NULL;
 246         cfg->unwanted_threshold = 0;
 247         cfg->hide_identity = 0;
 248         cfg->hide_version = 0;
 249         cfg->hide_trustanchor = 0;
 250         cfg->hide_http_user_agent = 0;
 251         cfg->identity = NULL;
 252         cfg->version = NULL;
 253         cfg->http_user_agent = NULL;
 254         cfg->nsid_cfg_str = NULL;
 255         cfg->nsid = NULL;
 256         cfg->nsid_len = 0;
 257         cfg->auto_trust_anchor_file_list = NULL;
 258         cfg->trust_anchor_file_list = NULL;
 259         cfg->trust_anchor_list = NULL;
 260         cfg->trusted_keys_file_list = NULL;
 261         cfg->trust_anchor_signaling = 1;
 262         cfg->root_key_sentinel = 1;
 263         cfg->domain_insecure = NULL;
 264         cfg->val_date_override = 0;
 265         cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */
 266         cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */
 267         cfg->val_max_restart = 5;
 268         cfg->val_clean_additional = 1;
 269         cfg->val_log_level = 0;
 270         cfg->val_log_squelch = 0;
 271         cfg->val_permissive_mode = 0;
 272         cfg->aggressive_nsec = 1;
 273         cfg->ignore_cd = 0;
 274         cfg->disable_edns_do = 0;
 275         cfg->serve_expired = 0;
 276         cfg->serve_expired_ttl = 0;
 277         cfg->serve_expired_ttl_reset = 0;
 278         cfg->serve_expired_reply_ttl = 30;
 279         cfg->serve_expired_client_timeout = 0;
 280         cfg->ede_serve_expired = 0;
 281         cfg->serve_original_ttl = 0;
 282         cfg->zonemd_permissive_mode = 0;
 283         cfg->add_holddown = 30*24*3600;
 284         cfg->del_holddown = 30*24*3600;
 285         cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */
 286         cfg->permit_small_holddown = 0;
 287         cfg->key_cache_size = 4 * 1024 * 1024;
 288         cfg->key_cache_slabs = 4;
 289         cfg->neg_cache_size = 1 * 1024 * 1024;
 290         cfg->local_zones = NULL;
 291         cfg->local_zones_nodefault = NULL;
 292 #ifdef USE_IPSET
 293         cfg->local_zones_ipset = NULL;
 294 #endif
 295         cfg->local_zones_disable_default = 0;
 296         cfg->local_data = NULL;
 297         cfg->local_zone_overrides = NULL;
 298         cfg->unblock_lan_zones = 0;
 299         cfg->insecure_lan_zones = 0;
 300         cfg->python_script = NULL;
 301         cfg->dynlib_file = NULL;
 302         cfg->remote_control_enable = 0;
 303         cfg->control_ifs.first = NULL;
 304         cfg->control_ifs.last = NULL;
 305         cfg->control_port = UNBOUND_CONTROL_PORT;
 306         cfg->control_use_cert = 1;
 307         cfg->minimal_responses = 1;
 308         cfg->rrset_roundrobin = 1;
 309         cfg->unknown_server_time_limit = 376;
 310         cfg->max_udp_size = 1232; /* value taken from edns_buffer_size */
 311         if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
 312                 goto error_exit;
 313         if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
 314                 goto error_exit;
 315         if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
 316                 goto error_exit;
 317         if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
 318                 goto error_exit;
 319
 320 #ifdef CLIENT_SUBNET
 321         if(!(cfg->module_conf = strdup("subnetcache validator iterator"))) goto error_exit;
 322 #else
 323         if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
 324 #endif
 325         if(!(cfg->val_nsec3_key_iterations =
 326                 strdup("1024 150 2048 150 4096 150"))) goto error_exit;
 327 #if defined(DNSTAP_SOCKET_PATH)
 328         if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
 329                 goto error_exit;
 330 #endif
 331         cfg->dnstap_bidirectional = 1;
 332         cfg->dnstap_tls = 1;
 333         cfg->disable_dnssec_lame_check = 0;
 334         cfg->ip_ratelimit_cookie = 0;
 335         cfg->ip_ratelimit = 0;
 336         cfg->ratelimit = 0;
 337         cfg->ip_ratelimit_slabs = 4;
 338         cfg->ratelimit_slabs = 4;
 339         cfg->ip_ratelimit_size = 4*1024*1024;
 340         cfg->ratelimit_size = 4*1024*1024;
 341         cfg->ratelimit_for_domain = NULL;
 342         cfg->ratelimit_below_domain = NULL;
 343         cfg->ip_ratelimit_factor = 10;
 344         cfg->ratelimit_factor = 10;
 345         cfg->ip_ratelimit_backoff = 0;
 346         cfg->ratelimit_backoff = 0;
 347         cfg->outbound_msg_retry = 5;
 348         cfg->max_sent_count = 32;
 349         cfg->max_query_restarts = 11;
 350         cfg->qname_minimisation = 1;
 351         cfg->qname_minimisation_strict = 0;
 352         cfg->shm_enable = 0;
 353         cfg->shm_key = 11777;
 354         cfg->edns_client_strings = NULL;
 355         cfg->edns_client_string_opcode = 65001;
 356         cfg->dnscrypt = 0;
 357         cfg->dnscrypt_port = 0;
 358         cfg->dnscrypt_provider = NULL;
 359         cfg->dnscrypt_provider_cert = NULL;
 360         cfg->dnscrypt_provider_cert_rotated = NULL;
 361         cfg->dnscrypt_secret_key = NULL;
 362         cfg->dnscrypt_shared_secret_cache_size = 4*1024*1024;
 363         cfg->dnscrypt_shared_secret_cache_slabs = 4;
 364         cfg->dnscrypt_nonce_cache_size = 4*1024*1024;
 365         cfg->dnscrypt_nonce_cache_slabs = 4;
 366         cfg->pad_responses = 1;
 367         cfg->pad_responses_block_size = 468; /* from RFC8467 */
 368         cfg->pad_queries = 1;
 369         cfg->pad_queries_block_size = 128; /* from RFC8467 */
 370 #ifdef USE_IPSECMOD
 371         cfg->ipsecmod_enabled = 1;
 372         cfg->ipsecmod_ignore_bogus = 0;
 373         cfg->ipsecmod_hook = NULL;
 374         cfg->ipsecmod_max_ttl = 3600;
 375         cfg->ipsecmod_whitelist = NULL;
 376         cfg->ipsecmod_strict = 0;
 377 #endif
 378         cfg->do_answer_cookie = 0;
 379         memset(cfg->cookie_secret, 0, sizeof(cfg->cookie_secret));
 380         cfg->cookie_secret_len = 16;
 381         init_cookie_secret(cfg->cookie_secret, cfg->cookie_secret_len);
 382 #ifdef USE_CACHEDB
 383         if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit;
 384         if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit;
 385         cfg->cachedb_no_store = 0;
 386 #ifdef USE_REDIS
 387         if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit;
 388         cfg->redis_server_path = NULL;
 389         cfg->redis_server_password = NULL;
 390         cfg->redis_timeout = 100;
 391         cfg->redis_server_port = 6379;
 392         cfg->redis_expire_records = 0;
 393         cfg->redis_logical_db = 0;
 394 #endif  /* USE_REDIS */
 395 #endif  /* USE_CACHEDB */
 396 #ifdef USE_IPSET
 397         cfg->ipset_name_v4 = NULL;
 398         cfg->ipset_name_v6 = NULL;
 399 #endif
 400         cfg->ede = 0;
 401         return cfg;
 402 error_exit:
 403         config_delete(cfg);
 404         return NULL;
 405 }
 406
 407 struct config_file* config_create_forlib(void)
 408 {
 409         struct config_file* cfg = config_create();
 410         if(!cfg) return NULL;
 411         /* modifications for library use, less verbose, less memory */
 412         free(cfg->chrootdir);
 413         cfg->chrootdir = NULL;
 414         cfg->verbosity = 0;
 415         cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable'
 416                 and probably within the ulimit(maxfds) of the user */
 417         cfg->outgoing_num_tcp = 2;
 418         cfg->msg_cache_size = 1024*1024;
 419         cfg->msg_cache_slabs = 1;
 420         cfg->rrset_cache_size = 1024*1024;
 421         cfg->rrset_cache_slabs = 1;
 422         cfg->infra_cache_slabs = 1;
 423         cfg->use_syslog = 0;
 424         cfg->key_cache_size = 1024*1024;
 425         cfg->key_cache_slabs = 1;
 426         cfg->neg_cache_size = 100 * 1024;
 427         cfg->donotquery_localhost = 0; /* allow, so that you can ask a
 428                 forward nameserver running on localhost */
 429         cfg->val_log_level = 2; /* to fill why_bogus with */
 430         cfg->val_log_squelch = 1;
 431         cfg->minimal_responses = 0;
 432         cfg->harden_short_bufsize = 1;
 433         return cfg;
 434 }
 435
 436 /** check that the value passed is >= 0 */
 437 #define IS_NUMBER_OR_ZERO \
 438         if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0
 439 /** check that the value passed is > 0 */
 440 #define IS_NONZERO_NUMBER \
 441         if(atoi(val) == 0) return 0
 442 /** check that the value passed is not 0 and a power of 2 */
 443 #define IS_POW2_NUMBER \
 444         if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0
 445 /** check that the value passed is yes or no */
 446 #define IS_YES_OR_NO \
 447         if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0
 448 /** put integer_or_zero into variable */
 449 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 450         { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); }
 451 /** put integer_nonzero into variable */
 452 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 453         { IS_NONZERO_NUMBER; cfg->var = atoi(val); }
 454 /** put integer_or_zero into unsigned */
 455 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 456         { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); }
 457 /** put integer_or_zero into size_t */
 458 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 459         { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); }
 460 /** put integer_nonzero into size_t */
 461 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 462         { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); }
 463 /** put yesno into variable */
 464 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \
 465         { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); }
 466 /** put memsize into variable */
 467 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \
 468         { return cfg_parse_memsize(val, &cfg->var); }
 469 /** put pow2 number into variable */
 470 #define S_POW2(str, var) if(strcmp(opt, str)==0) \
 471         { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); }
 472 /** put string into variable */
 473 #define S_STR(str, var) if(strcmp(opt, str)==0) \
 474         { free(cfg->var); return (cfg->var = strdup(val)) != NULL; }
 475 /** put string into strlist */
 476 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \
 477         { return cfg_strlist_insert(&cfg->var, strdup(val)); }
 478 /** put string into strlist if not present yet*/
 479 #define S_STRLIST_UNIQ(str, var) if(strcmp(opt, str)==0) \
 480         { if(cfg_strlist_find(cfg->var, val)) { return 0;} \
 481           return cfg_strlist_insert(&cfg->var, strdup(val)); }
 482 /** append string to strlist */
 483 #define S_STRLIST_APPEND(str, var) if(strcmp(opt, str)==0) \
 484         { return cfg_strlist_append(&cfg->var, strdup(val)); }
 485
 486 int config_set_option(struct config_file* cfg, const char* opt,
 487         const char* val)
 488 {
 489         char buf[64];
 490         if(!opt) return 0;
 491         if(opt[strlen(opt)-1] != ':' && strlen(opt)+2<sizeof(buf)) {
 492                 snprintf(buf, sizeof(buf), "%s:", opt);
 493                 opt = buf;
 494         }
 495         S_NUMBER_OR_ZERO("verbosity:", verbosity)
 496         else if(strcmp(opt, "statistics-interval:") == 0) {
 497                 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
 498                         cfg->stat_interval = 0;
 499                 else if(atoi(val) == 0)
 500                         return 0;
 501                 else cfg->stat_interval = atoi(val);
 502         } else if(strcmp(opt, "num-threads:") == 0) {
 503                 /* not supported, library must have 1 thread in bgworker */
 504                 return 0;
 505         } else if(strcmp(opt, "outgoing-port-permit:") == 0) {
 506                 return cfg_mark_ports(val, 1,
 507                         cfg->outgoing_avail_ports, 65536);
 508         } else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
 509                 return cfg_mark_ports(val, 0,
 510                         cfg->outgoing_avail_ports, 65536);
 511         } else if(strcmp(opt, "local-zone:") == 0) {
 512                 return cfg_parse_local_zone(cfg, val);
 513         } else if(strcmp(opt, "val-override-date:") == 0) {
 514                 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) {
 515                         cfg->val_date_override = 0;
 516                 } else if(strlen(val) == 14) {
 517                         cfg->val_date_override = cfg_convert_timeval(val);
 518                         return cfg->val_date_override != 0;
 519                 } else {
 520                         if(atoi(val) == 0) return 0;
 521                         cfg->val_date_override = (uint32_t)atoi(val);
 522                 }
 523         } else if(strcmp(opt, "local-data-ptr:") == 0) {
 524                 char* ptr = cfg_ptr_reverse((char*)opt);
 525                 return cfg_strlist_insert(&cfg->local_data, ptr);
 526         } else if(strcmp(opt, "logfile:") == 0) {
 527                 cfg->use_syslog = 0;
 528                 free(cfg->logfile);
 529                 return (cfg->logfile = strdup(val)) != NULL;
 530         }
 531         else if(strcmp(opt, "log-time-ascii:") == 0)
 532         { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0);
 533           log_set_time_asc(cfg->log_time_ascii); }
 534         else S_SIZET_NONZERO("max-udp-size:", max_udp_size)
 535         else S_YNO("use-syslog:", use_syslog)
 536         else S_STR("log-identity:", log_identity)
 537         else S_YNO("extended-statistics:", stat_extended)
 538         else S_YNO("statistics-inhibit-zero:", stat_inhibit_zero)
 539         else S_YNO("statistics-cumulative:", stat_cumulative)
 540         else S_YNO("shm-enable:", shm_enable)
 541         else S_NUMBER_OR_ZERO("shm-key:", shm_key)
 542         else S_YNO("do-ip4:", do_ip4)
 543         else S_YNO("do-ip6:", do_ip6)
 544         else S_YNO("do-udp:", do_udp)
 545         else S_YNO("do-tcp:", do_tcp)
 546         else S_YNO("prefer-ip4:", prefer_ip4)
 547         else S_YNO("prefer-ip6:", prefer_ip6)
 548         else S_YNO("tcp-upstream:", tcp_upstream)
 549         else S_YNO("udp-upstream-without-downstream:",
 550                 udp_upstream_without_downstream)
 551         else S_NUMBER_NONZERO("tcp-mss:", tcp_mss)
 552         else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss)
 553         else S_NUMBER_NONZERO("tcp-auth-query-timeout:", tcp_auth_query_timeout)
 554         else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout)
 555         else S_NUMBER_NONZERO("max-reuse-tcp-queries:", max_reuse_tcp_queries)
 556         else S_NUMBER_NONZERO("tcp-reuse-timeout:", tcp_reuse_timeout)
 557         else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive)
 558         else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout)
 559         else S_NUMBER_OR_ZERO("sock-queue-timeout:", sock_queue_timeout)
 560         else S_YNO("ssl-upstream:", ssl_upstream)
 561         else S_YNO("tls-upstream:", ssl_upstream)
 562         else S_STR("ssl-service-key:", ssl_service_key)
 563         else S_STR("tls-service-key:", ssl_service_key)
 564         else S_STR("ssl-service-pem:", ssl_service_pem)
 565         else S_STR("tls-service-pem:", ssl_service_pem)
 566         else S_NUMBER_NONZERO("ssl-port:", ssl_port)
 567         else S_NUMBER_NONZERO("tls-port:", ssl_port)
 568         else S_STR("ssl-cert-bundle:", tls_cert_bundle)
 569         else S_STR("tls-cert-bundle:", tls_cert_bundle)
 570         else S_YNO("tls-win-cert:", tls_win_cert)
 571         else S_YNO("tls-system-cert:", tls_win_cert)
 572         else S_STRLIST("additional-ssl-port:", tls_additional_port)
 573         else S_STRLIST("additional-tls-port:", tls_additional_port)
 574         else S_STRLIST("tls-additional-ports:", tls_additional_port)
 575         else S_STRLIST("tls-additional-port:", tls_additional_port)
 576         else S_STRLIST_APPEND("tls-session-ticket-keys:", tls_session_ticket_keys)
 577         else S_STR("tls-ciphers:", tls_ciphers)
 578         else S_STR("tls-ciphersuites:", tls_ciphersuites)
 579         else S_YNO("tls-use-sni:", tls_use_sni)
 580         else S_NUMBER_NONZERO("https-port:", https_port)
 581         else S_STR("http-endpoint:", http_endpoint)
 582         else S_NUMBER_NONZERO("http-max-streams:", http_max_streams)
 583         else S_MEMSIZE("http-query-buffer-size:", http_query_buffer_size)
 584         else S_MEMSIZE("http-response-buffer-size:", http_response_buffer_size)
 585         else S_YNO("http-nodelay:", http_nodelay)
 586         else S_YNO("http-notls-downstream:", http_notls_downstream)
 587         else S_YNO("interface-automatic:", if_automatic)
 588         else S_STR("interface-automatic-ports:", if_automatic_ports)
 589         else S_YNO("use-systemd:", use_systemd)
 590         else S_YNO("do-daemonize:", do_daemonize)
 591         else S_NUMBER_NONZERO("port:", port)
 592         else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports)
 593         else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp)
 594         else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp)
 595         else S_MEMSIZE("stream-wait-size:", stream_wait_size)
 596         else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size)
 597         else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size)
 598         else S_MEMSIZE("msg-cache-size:", msg_cache_size)
 599         else S_POW2("msg-cache-slabs:", msg_cache_slabs)
 600         else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread)
 601         else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time)
 602         else S_MEMSIZE("so-rcvbuf:", so_rcvbuf)
 603         else S_MEMSIZE("so-sndbuf:", so_sndbuf)
 604         else S_YNO("so-reuseport:", so_reuseport)
 605         else S_YNO("ip-transparent:", ip_transparent)
 606         else S_YNO("ip-freebind:", ip_freebind)
 607         else S_NUMBER_OR_ZERO("ip-dscp:", ip_dscp)
 608         else S_MEMSIZE("rrset-cache-size:", rrset_cache_size)
 609         else S_POW2("rrset-cache-slabs:", rrset_cache_slabs)
 610         else S_YNO("prefetch:", prefetch)
 611         else S_YNO("prefetch-key:", prefetch_key)
 612         else S_YNO("deny-any:", deny_any)
 613         else if(strcmp(opt, "cache-max-ttl:") == 0)
 614         { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
 615         else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
 616         { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
 617         else if(strcmp(opt, "cache-min-ttl:") == 0)
 618         { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
 619         else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
 620                 IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val);
 621                 RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt;
 622         }
 623         else if(strcmp(opt, "infra-cache-max-rtt:") == 0) {
 624                 IS_NUMBER_OR_ZERO; cfg->infra_cache_max_rtt = atoi(val);
 625                 RTT_MAX_TIMEOUT=cfg->infra_cache_max_rtt;
 626                 USEFUL_SERVER_TOP_TIMEOUT = RTT_MAX_TIMEOUT;
 627                 BLACKLIST_PENALTY = USEFUL_SERVER_TOP_TIMEOUT*4;
 628         }
 629         else S_YNO("infra-keep-probing:", infra_keep_probing)
 630         else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl)
 631         else S_POW2("infra-cache-slabs:", infra_cache_slabs)
 632         else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts)
 633         else S_NUMBER_OR_ZERO("delay-close:", delay_close)
 634         else S_YNO("udp-connect:", udp_connect)
 635         else S_STR("chroot:", chrootdir)
 636         else S_STR("username:", username)
 637         else S_STR("directory:", directory)
 638         else S_STR("pidfile:", pidfile)
 639         else S_YNO("hide-identity:", hide_identity)
 640         else S_YNO("hide-version:", hide_version)
 641         else S_YNO("hide-trustanchor:", hide_trustanchor)
 642         else S_YNO("hide-http-user-agent:", hide_http_user_agent)
 643         else S_STR("identity:", identity)
 644         else S_STR("version:", version)
 645         else S_STR("http-user-agent:", http_user_agent)
 646         else if(strcmp(opt, "nsid:") == 0) {
 647                 free(cfg->nsid_cfg_str);
 648                 if (!(cfg->nsid_cfg_str = strdup(val)))
 649                         return 0;
 650                 /* Empty string is just validly unsetting nsid */
 651                 if (*val == 0) {
 652                         free(cfg->nsid);
 653                         cfg->nsid = NULL;
 654                         cfg->nsid_len = 0;
 655                         return 1;
 656                 }
 657                 cfg->nsid = cfg_parse_nsid(val, &cfg->nsid_len);
 658                 return cfg->nsid != NULL;
 659         }
 660         else S_STRLIST("root-hints:", root_hints)
 661         else S_STR("target-fetch-policy:", target_fetch_policy)
 662         else S_YNO("harden-glue:", harden_glue)
 663         else S_YNO("harden-short-bufsize:", harden_short_bufsize)
 664         else S_YNO("harden-large-queries:", harden_large_queries)
 665         else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
 666         else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
 667         else S_YNO("harden-referral-path:", harden_referral_path)
 668         else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
 669         else S_YNO("harden-unknown-additional:", harden_unknown_additional)
 670         else S_YNO("use-caps-for-id:", use_caps_bits_for_id)
 671         else S_STRLIST("caps-whitelist:", caps_whitelist)
 672         else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
 673         else S_STRLIST("private-address:", private_address)
 674         else S_STRLIST("private-domain:", private_domain)
 675         else S_YNO("do-not-query-localhost:", donotquery_localhost)
 676         else S_STRLIST("do-not-query-address:", donotqueryaddrs)
 677         else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list)
 678         else S_STRLIST("trust-anchor-file:", trust_anchor_file_list)
 679         else S_STRLIST("trust-anchor:", trust_anchor_list)
 680         else S_STRLIST("trusted-keys-file:", trusted_keys_file_list)
 681         else S_YNO("trust-anchor-signaling:", trust_anchor_signaling)
 682         else S_YNO("root-key-sentinel:", root_key_sentinel)
 683         else S_STRLIST("domain-insecure:", domain_insecure)
 684         else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl)
 685         else S_YNO("val-clean-additional:", val_clean_additional)
 686         else S_NUMBER_OR_ZERO("val-log-level:", val_log_level)
 687         else S_YNO("val-log-squelch:", val_log_squelch)
 688         else S_YNO("log-queries:", log_queries)
 689         else S_YNO("log-replies:", log_replies)
 690         else S_YNO("log-tag-queryreply:", log_tag_queryreply)
 691         else S_YNO("log-local-actions:", log_local_actions)
 692         else S_YNO("log-servfail:", log_servfail)
 693         else S_YNO("val-permissive-mode:", val_permissive_mode)
 694         else S_YNO("aggressive-nsec:", aggressive_nsec)
 695         else S_YNO("ignore-cd-flag:", ignore_cd)
 696         else S_YNO("disable-edns-do:", disable_edns_do)
 697         else if(strcmp(opt, "serve-expired:") == 0)
 698         { IS_YES_OR_NO; cfg->serve_expired = (strcmp(val, "yes") == 0);
 699           SERVE_EXPIRED = cfg->serve_expired; }
 700         else if(strcmp(opt, "serve-expired-ttl:") == 0)
 701         { IS_NUMBER_OR_ZERO; cfg->serve_expired_ttl = atoi(val); SERVE_EXPIRED_TTL=(time_t)cfg->serve_expired_ttl;}
 702         else S_YNO("serve-expired-ttl-reset:", serve_expired_ttl_reset)
 703         else if(strcmp(opt, "serve-expired-reply-ttl:") == 0)
 704         { IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;}
 705         else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout)
 706         else S_YNO("ede:", ede)
 707         else S_YNO("ede-serve-expired:", ede_serve_expired)
 708         else S_YNO("serve-original-ttl:", serve_original_ttl)
 709         else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
 710         else S_YNO("zonemd-permissive-mode:", zonemd_permissive_mode)
 711         else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown)
 712         else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown)
 713         else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing)
 714         else if(strcmp(opt, "permit-small-holddown:") == 0)
 715         { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0);
 716           autr_permit_small_holddown = cfg->permit_small_holddown; }
 717         else S_MEMSIZE("key-cache-size:", key_cache_size)
 718         else S_POW2("key-cache-slabs:", key_cache_slabs)
 719         else S_MEMSIZE("neg-cache-size:", neg_cache_size)
 720         else S_YNO("minimal-responses:", minimal_responses)
 721         else S_YNO("rrset-roundrobin:", rrset_roundrobin)
 722         else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit)
 723         else S_STRLIST("local-data:", local_data)
 724         else S_YNO("unblock-lan-zones:", unblock_lan_zones)
 725         else S_YNO("insecure-lan-zones:", insecure_lan_zones)
 726         else S_YNO("control-enable:", remote_control_enable)
 727         else S_STRLIST_APPEND("control-interface:", control_ifs)
 728         else S_NUMBER_NONZERO("control-port:", control_port)
 729         else S_STR("server-key-file:", server_key_file)
 730         else S_STR("server-cert-file:", server_cert_file)
 731         else S_STR("control-key-file:", control_key_file)
 732         else S_STR("control-cert-file:", control_cert_file)
 733         else S_STR("module-config:", module_conf)
 734         else S_STRLIST("python-script:", python_script)
 735         else S_STRLIST("dynlib-file:", dynlib_file)
 736         else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check)
 737 #ifdef CLIENT_SUBNET
 738         /* Can't set max subnet prefix here, since that value is used when
 739          * generating the address tree. */
 740         /* No client-subnet-always-forward here, module registration depends on
 741          * this option. */
 742 #endif
 743 #ifdef USE_DNSTAP
 744         else S_YNO("dnstap-enable:", dnstap)
 745         else S_YNO("dnstap-bidirectional:", dnstap_bidirectional)
 746         else S_STR("dnstap-socket-path:", dnstap_socket_path)
 747         else S_STR("dnstap-ip:", dnstap_ip)
 748         else S_YNO("dnstap-tls:", dnstap_tls)
 749         else S_STR("dnstap-tls-server-name:", dnstap_tls_server_name)
 750         else S_STR("dnstap-tls-cert-bundle:", dnstap_tls_cert_bundle)
 751         else S_STR("dnstap-tls-client-key-file:", dnstap_tls_client_key_file)
 752         else S_STR("dnstap-tls-client-cert-file:",
 753                 dnstap_tls_client_cert_file)
 754         else S_YNO("dnstap-send-identity:", dnstap_send_identity)
 755         else S_YNO("dnstap-send-version:", dnstap_send_version)
 756         else S_STR("dnstap-identity:", dnstap_identity)
 757         else S_STR("dnstap-version:", dnstap_version)
 758         else S_YNO("dnstap-log-resolver-query-messages:",
 759                 dnstap_log_resolver_query_messages)
 760         else S_YNO("dnstap-log-resolver-response-messages:",
 761                 dnstap_log_resolver_response_messages)
 762         else S_YNO("dnstap-log-client-query-messages:",
 763                 dnstap_log_client_query_messages)
 764         else S_YNO("dnstap-log-client-response-messages:",
 765                 dnstap_log_client_response_messages)
 766         else S_YNO("dnstap-log-forwarder-query-messages:",
 767                 dnstap_log_forwarder_query_messages)
 768         else S_YNO("dnstap-log-forwarder-response-messages:",
 769                 dnstap_log_forwarder_response_messages)
 770 #endif
 771 #ifdef USE_DNSCRYPT
 772         else S_YNO("dnscrypt-enable:", dnscrypt)
 773         else S_NUMBER_NONZERO("dnscrypt-port:", dnscrypt_port)
 774         else S_STR("dnscrypt-provider:", dnscrypt_provider)
 775         else S_STRLIST_UNIQ("dnscrypt-provider-cert:", dnscrypt_provider_cert)
 776         else S_STRLIST("dnscrypt-provider-cert-rotated:", dnscrypt_provider_cert_rotated)
 777         else S_STRLIST_UNIQ("dnscrypt-secret-key:", dnscrypt_secret_key)
 778         else S_MEMSIZE("dnscrypt-shared-secret-cache-size:",
 779                 dnscrypt_shared_secret_cache_size)
 780         else S_POW2("dnscrypt-shared-secret-cache-slabs:",
 781                 dnscrypt_shared_secret_cache_slabs)
 782         else S_MEMSIZE("dnscrypt-nonce-cache-size:",
 783                 dnscrypt_nonce_cache_size)
 784         else S_POW2("dnscrypt-nonce-cache-slabs:",
 785                 dnscrypt_nonce_cache_slabs)
 786 #endif
 787         else if(strcmp(opt, "ip-ratelimit-cookie:") == 0) {
 788             IS_NUMBER_OR_ZERO; cfg->ip_ratelimit_cookie = atoi(val);
 789             infra_ip_ratelimit_cookie=cfg->ip_ratelimit_cookie;
 790         }
 791         else if(strcmp(opt, "ip-ratelimit:") == 0) {
 792             IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val);
 793             infra_ip_ratelimit=cfg->ip_ratelimit;
 794         }
 795         else if(strcmp(opt, "ratelimit:") == 0) {
 796             IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val);
 797             infra_dp_ratelimit=cfg->ratelimit;
 798         }
 799         else S_MEMSIZE("ip-ratelimit-size:", ip_ratelimit_size)
 800         else S_MEMSIZE("ratelimit-size:", ratelimit_size)
 801         else S_POW2("ip-ratelimit-slabs:", ip_ratelimit_slabs)
 802         else S_POW2("ratelimit-slabs:", ratelimit_slabs)
 803         else S_NUMBER_OR_ZERO("ip-ratelimit-factor:", ip_ratelimit_factor)
 804         else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor)
 805         else S_YNO("ip-ratelimit-backoff:", ip_ratelimit_backoff)
 806         else S_YNO("ratelimit-backoff:", ratelimit_backoff)
 807         else S_NUMBER_NONZERO("outbound-msg-retry:", outbound_msg_retry)
 808         else S_NUMBER_NONZERO("max-sent-count:", max_sent_count)
 809         else S_NUMBER_NONZERO("max-query-restarts:", max_query_restarts)
 810         else S_SIZET_NONZERO("fast-server-num:", fast_server_num)
 811         else S_NUMBER_OR_ZERO("fast-server-permil:", fast_server_permil)
 812         else S_YNO("qname-minimisation:", qname_minimisation)
 813         else S_YNO("qname-minimisation-strict:", qname_minimisation_strict)
 814         else S_YNO("pad-responses:", pad_responses)
 815         else S_SIZET_NONZERO("pad-responses-block-size:", pad_responses_block_size)
 816         else S_YNO("pad-queries:", pad_queries)
 817         else S_SIZET_NONZERO("pad-queries-block-size:", pad_queries_block_size)
 818         else S_STRLIST("proxy-protocol-port:", proxy_protocol_port)
 819 #ifdef USE_IPSECMOD
 820         else S_YNO("ipsecmod-enabled:", ipsecmod_enabled)
 821         else S_YNO("ipsecmod-ignore-bogus:", ipsecmod_ignore_bogus)
 822         else if(strcmp(opt, "ipsecmod-max-ttl:") == 0)
 823         { IS_NUMBER_OR_ZERO; cfg->ipsecmod_max_ttl = atoi(val); }
 824         else S_YNO("ipsecmod-strict:", ipsecmod_strict)
 825 #endif
 826 #ifdef USE_CACHEDB
 827         else S_YNO("cachedb-no-store:", cachedb_no_store)
 828 #endif /* USE_CACHEDB */
 829         else if(strcmp(opt, "define-tag:") ==0) {
 830                 return config_add_tag(cfg, val);
 831         /* val_sig_skew_min, max and val_max_restart are copied into val_env
 832          * during init so this does not update val_env with set_option */
 833         } else if(strcmp(opt, "val-sig-skew-min:") == 0)
 834         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); }
 835         else if(strcmp(opt, "val-sig-skew-max:") == 0)
 836         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); }
 837         else if(strcmp(opt, "val-max-restart:") == 0)
 838         { IS_NUMBER_OR_ZERO; cfg->val_max_restart = (int32_t)atoi(val); }
 839         else if (strcmp(opt, "outgoing-interface:") == 0) {
 840                 char* d = strdup(val);
 841                 char** oi =
 842                 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
 843                 if(!d || !oi) { free(d); free(oi); return -1; }
 844                 if(cfg->out_ifs && cfg->num_out_ifs) {
 845                         memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*));
 846                         free(cfg->out_ifs);
 847                 }
 848                 oi[cfg->num_out_ifs++] = d;
 849                 cfg->out_ifs = oi;
 850         } else {
 851                 /* unknown or unsupported (from the set_option interface):
 852                  * interface, outgoing-interface, access-control,
 853                  * stub-zone, name, stub-addr, stub-host, stub-prime
 854                  * forward-first, stub-first, forward-ssl-upstream,
 855                  * stub-ssl-upstream, forward-zone, auth-zone
 856                  * name, forward-addr, forward-host,
 857                  * ratelimit-for-domain, ratelimit-below-domain,
 858                  * local-zone-tag, access-control-view, interface-*,
 859                  * send-client-subnet, client-subnet-always-forward,
 860                  * max-client-subnet-ipv4, max-client-subnet-ipv6,
 861                  * min-client-subnet-ipv4, min-client-subnet-ipv6,
 862                  * max-ecs-tree-size-ipv4, max-ecs-tree-size-ipv6, ipsecmod_hook,
 863                  * ipsecmod_whitelist. */
 864                 return 0;
 865         }
 866         return 1;
 867 }
 868
 869 void config_print_func(char* line, void* arg)
 870 {
 871         FILE* f = (FILE*)arg;
 872         (void)fprintf(f, "%s\n", line);
 873 }
 874
 875 /** collate func arg */
 876 struct config_collate_arg {
 877         /** list of result items */
 878         struct config_strlist_head list;
 879         /** if a malloc error occurred, 0 is OK */
 880         int status;
 881 };
 882
 883 void config_collate_func(char* line, void* arg)
 884 {
 885         struct config_collate_arg* m = (struct config_collate_arg*)arg;
 886         if(m->status)
 887                 return;
 888         if(!cfg_strlist_append(&m->list, strdup(line)))
 889                 m->status = 1;
 890 }
 891
 892 int config_get_option_list(struct config_file* cfg, const char* opt,
 893         struct config_strlist** list)
 894 {
 895         struct config_collate_arg m;
 896         memset(&m, 0, sizeof(m));
 897         *list = NULL;
 898         if(!config_get_option(cfg, opt, config_collate_func, &m))
 899                 return 1;
 900         if(m.status) {
 901                 config_delstrlist(m.list.first);
 902                 return 2;
 903         }
 904         *list = m.list.first;
 905         return 0;
 906 }
 907
 908 int
 909 config_get_option_collate(struct config_file* cfg, const char* opt, char** str)
 910 {
 911         struct config_strlist* list = NULL;
 912         int r;
 913         *str = NULL;
 914         if((r = config_get_option_list(cfg, opt, &list)) != 0)
 915                 return r;
 916         *str = config_collate_cat(list);
 917         config_delstrlist(list);
 918         if(!*str) return 2;
 919         return 0;
 920 }
 921
 922 char*
 923 config_collate_cat(struct config_strlist* list)
 924 {
 925         size_t total = 0, left;
 926         struct config_strlist* s;
 927         char *r, *w;
 928         if(!list) /* no elements */
 929                 return strdup("");
 930         if(list->next == NULL) /* one element , no newline at end. */
 931                 return strdup(list->str);
 932         /* count total length */
 933         for(s=list; s; s=s->next)
 934                 total += strlen(s->str) + 1; /* len + newline */
 935         left = total+1; /* one extra for nul at end */
 936         r = malloc(left);
 937         if(!r)
 938                 return NULL;
 939         w = r;
 940         for(s=list; s; s=s->next) {
 941                 size_t this = strlen(s->str);
 942                 if(this+2 > left) { /* sanity check */
 943                         free(r);
 944                         return NULL;
 945                 }
 946                 snprintf(w, left, "%s\n", s->str);
 947                 this = strlen(w);
 948                 w += this;
 949                 left -= this;
 950         }
 951         return r;
 952 }
 953
 954 /** compare and print decimal option */
 955 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \
 956         {snprintf(buf, len, "%d", (int)cfg->var); \
 957         func(buf, arg);}
 958 /** compare and print unsigned option */
 959 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \
 960         {snprintf(buf, len, "%u", (unsigned)cfg->var); \
 961         func(buf, arg);}
 962 /** compare and print yesno option */
 963 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \
 964         {func(cfg->var?"yes":"no", arg);}
 965 /** compare and print string option */
 966 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \
 967         {func(cfg->var?cfg->var:"", arg);}
 968 /** compare and print array option */
 969 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \
 970         {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);}
 971 /** compare and print memorysize option */
 972 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \
 973         if(cfg->var > 1024*1024*1024) { \
 974           size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \
 975           snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \
 976         } else snprintf(buf, len, "%u", (unsigned)cfg->var); \
 977         func(buf, arg);}
 978 /** compare and print list option */
 979 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \
 980         struct config_strlist* p = cfg->lst; \
 981         for(p = cfg->lst; p; p = p->next) \
 982                 func(p->str, arg); \
 983         }
 984 /** compare and print list option */
 985 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \
 986         struct config_str2list* p = cfg->lst; \
 987         for(p = cfg->lst; p; p = p->next) { \
 988                 snprintf(buf, len, "%s %s", p->str, p->str2); \
 989                 func(buf, arg); \
 990         } \
 991         }
 992 /** compare and print list option */
 993 #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \
 994         struct config_str3list* p = cfg->lst; \
 995         for(p = cfg->lst; p; p = p->next) { \
 996                 snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \
 997                 func(buf, arg); \
 998         } \
 999         }
1000 /** compare and print taglist option */
1001 #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \
1002         char* tmpstr = NULL; \
1003         struct config_strbytelist *p = cfg->lst; \
1004         for(p = cfg->lst; p; p = p->next) {\
1005                 tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \
1006                 if(tmpstr) {\
1007                         snprintf(buf, len, "%s %s", p->str, tmpstr); \
1008                         func(buf, arg); \
1009                         free(tmpstr); \
1010                 } \
1011         } \
1012         }
1013
1014 int
1015 config_get_option(struct config_file* cfg, const char* opt,
1016         void (*func)(char*,void*), void* arg)
1017 {
1018         char buf[1024], nopt[64];
1019         size_t len = sizeof(buf);
1020         if(!opt) return 0;
1021         if(opt && opt[strlen(opt)-1] == ':' && strlen(opt)<sizeof(nopt)) {
1022                 memmove(nopt, opt, strlen(opt));
1023                 nopt[strlen(opt)-1] = 0;
1024                 opt = nopt;
1025         }
1026         fptr_ok(fptr_whitelist_print_func(func));
1027         O_DEC(opt, "verbosity", verbosity)
1028         else O_DEC(opt, "statistics-interval", stat_interval)
1029         else O_YNO(opt, "statistics-cumulative", stat_cumulative)
1030         else O_YNO(opt, "extended-statistics", stat_extended)
1031         else O_YNO(opt, "statistics-inhibit-zero", stat_inhibit_zero)
1032         else O_YNO(opt, "shm-enable", shm_enable)
1033         else O_DEC(opt, "shm-key", shm_key)
1034         else O_YNO(opt, "use-syslog", use_syslog)
1035         else O_STR(opt, "log-identity", log_identity)
1036         else O_YNO(opt, "log-time-ascii", log_time_ascii)
1037         else O_DEC(opt, "num-threads", num_threads)
1038         else O_IFC(opt, "interface", num_ifs, ifs)
1039         else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
1040         else O_YNO(opt, "interface-automatic", if_automatic)
1041         else O_STR(opt, "interface-automatic-ports", if_automatic_ports)
1042         else O_DEC(opt, "port", port)
1043         else O_DEC(opt, "outgoing-range", outgoing_num_ports)
1044         else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
1045         else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
1046         else O_MEM(opt, "stream-wait-size", stream_wait_size)
1047         else O_DEC(opt, "edns-buffer-size", edns_buffer_size)
1048         else O_DEC(opt, "msg-buffer-size", msg_buffer_size)
1049         else O_MEM(opt, "msg-cache-size", msg_cache_size)
1050         else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs)
1051         else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread)
1052         else O_UNS(opt, "jostle-timeout", jostle_time)
1053         else O_MEM(opt, "so-rcvbuf", so_rcvbuf)
1054         else O_MEM(opt, "so-sndbuf", so_sndbuf)
1055         else O_YNO(opt, "so-reuseport", so_reuseport)
1056         else O_YNO(opt, "ip-transparent", ip_transparent)
1057         else O_YNO(opt, "ip-freebind", ip_freebind)
1058         else O_DEC(opt, "ip-dscp", ip_dscp)
1059         else O_MEM(opt, "rrset-cache-size", rrset_cache_size)
1060         else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs)
1061         else O_YNO(opt, "prefetch-key", prefetch_key)
1062         else O_YNO(opt, "prefetch", prefetch)
1063         else O_YNO(opt, "deny-any", deny_any)
1064         else O_DEC(opt, "cache-max-ttl", max_ttl)
1065         else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
1066         else O_DEC(opt, "cache-min-ttl", min_ttl)
1067         else O_DEC(opt, "infra-host-ttl", host_ttl)
1068         else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
1069         else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt)
1070         else O_UNS(opt, "infra-cache-max-rtt", infra_cache_max_rtt)
1071         else O_YNO(opt, "infra-keep-probing", infra_keep_probing)
1072         else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts)
1073         else O_UNS(opt, "delay-close", delay_close)
1074         else O_YNO(opt, "udp-connect", udp_connect)
1075         else O_YNO(opt, "do-ip4", do_ip4)
1076         else O_YNO(opt, "do-ip6", do_ip6)
1077         else O_YNO(opt, "do-udp", do_udp)
1078         else O_YNO(opt, "do-tcp", do_tcp)
1079         else O_YNO(opt, "prefer-ip4", prefer_ip4)
1080         else O_YNO(opt, "prefer-ip6", prefer_ip6)
1081         else O_YNO(opt, "tcp-upstream", tcp_upstream)
1082         else O_YNO(opt, "udp-upstream-without-downstream", udp_upstream_without_downstream)
1083         else O_DEC(opt, "tcp-mss", tcp_mss)
1084         else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss)
1085         else O_DEC(opt, "tcp-auth-query-timeout", tcp_auth_query_timeout)
1086         else O_DEC(opt, "tcp-idle-timeout", tcp_idle_timeout)
1087         else O_DEC(opt, "max-reuse-tcp-queries", max_reuse_tcp_queries)
1088         else O_DEC(opt, "tcp-reuse-timeout", tcp_reuse_timeout)
1089         else O_YNO(opt, "edns-tcp-keepalive", do_tcp_keepalive)
1090         else O_DEC(opt, "edns-tcp-keepalive-timeout", tcp_keepalive_timeout)
1091         else O_DEC(opt, "sock-queue-timeout", sock_queue_timeout)
1092         else O_YNO(opt, "ssl-upstream", ssl_upstream)
1093         else O_YNO(opt, "tls-upstream", ssl_upstream)
1094         else O_STR(opt, "ssl-service-key", ssl_service_key)
1095         else O_STR(opt, "tls-service-key", ssl_service_key)
1096         else O_STR(opt, "ssl-service-pem", ssl_service_pem)
1097         else O_STR(opt, "tls-service-pem", ssl_service_pem)
1098         else O_DEC(opt, "ssl-port", ssl_port)
1099         else O_DEC(opt, "tls-port", ssl_port)
1100         else O_STR(opt, "ssl-cert-bundle", tls_cert_bundle)
1101         else O_STR(opt, "tls-cert-bundle", tls_cert_bundle)
1102         else O_YNO(opt, "tls-win-cert", tls_win_cert)
1103         else O_YNO(opt, "tls-system-cert", tls_win_cert)
1104         else O_LST(opt, "additional-ssl-port", tls_additional_port)
1105         else O_LST(opt, "additional-tls-port", tls_additional_port)
1106         else O_LST(opt, "tls-additional-ports", tls_additional_port)
1107         else O_LST(opt, "tls-additional-port", tls_additional_port)
1108         else O_LST(opt, "tls-session-ticket-keys", tls_session_ticket_keys.first)
1109         else O_STR(opt, "tls-ciphers", tls_ciphers)
1110         else O_STR(opt, "tls-ciphersuites", tls_ciphersuites)
1111         else O_YNO(opt, "tls-use-sni", tls_use_sni)
1112         else O_DEC(opt, "https-port", https_port)
1113         else O_STR(opt, "http-endpoint", http_endpoint)
1114         else O_UNS(opt, "http-max-streams", http_max_streams)
1115         else O_MEM(opt, "http-query-buffer-size", http_query_buffer_size)
1116         else O_MEM(opt, "http-response-buffer-size", http_response_buffer_size)
1117         else O_YNO(opt, "http-nodelay", http_nodelay)
1118         else O_YNO(opt, "http-notls-downstream", http_notls_downstream)
1119         else O_YNO(opt, "use-systemd", use_systemd)
1120         else O_YNO(opt, "do-daemonize", do_daemonize)
1121         else O_STR(opt, "chroot", chrootdir)
1122         else O_STR(opt, "username", username)
1123         else O_STR(opt, "directory", directory)
1124         else O_STR(opt, "logfile", logfile)
1125         else O_YNO(opt, "log-queries", log_queries)
1126         else O_YNO(opt, "log-replies", log_replies)
1127         else O_YNO(opt, "log-tag-queryreply", log_tag_queryreply)
1128         else O_YNO(opt, "log-local-actions", log_local_actions)
1129         else O_YNO(opt, "log-servfail", log_servfail)
1130         else O_STR(opt, "pidfile", pidfile)
1131         else O_YNO(opt, "hide-identity", hide_identity)
1132         else O_YNO(opt, "hide-version", hide_version)
1133         else O_YNO(opt, "hide-trustanchor", hide_trustanchor)
1134         else O_YNO(opt, "hide-http-user-agent", hide_http_user_agent)
1135         else O_STR(opt, "identity", identity)
1136         else O_STR(opt, "version", version)
1137         else O_STR(opt, "http-user-agent", http_user_agent)
1138         else O_STR(opt, "nsid", nsid_cfg_str)
1139         else O_STR(opt, "target-fetch-policy", target_fetch_policy)
1140         else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize)
1141         else O_YNO(opt, "harden-large-queries", harden_large_queries)
1142         else O_YNO(opt, "harden-glue", harden_glue)
1143         else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
1144         else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
1145         else O_YNO(opt, "harden-referral-path", harden_referral_path)
1146         else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
1147         else O_YNO(opt, "harden-unknown-additional", harden_unknown_additional)
1148         else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
1149         else O_LST(opt, "caps-whitelist", caps_whitelist)
1150         else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
1151         else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)
1152         else O_STR(opt, "module-config", module_conf)
1153         else O_DEC(opt, "val-bogus-ttl", bogus_ttl)
1154         else O_YNO(opt, "val-clean-additional", val_clean_additional)
1155         else O_DEC(opt, "val-log-level", val_log_level)
1156         else O_YNO(opt, "val-permissive-mode", val_permissive_mode)
1157         else O_YNO(opt, "aggressive-nsec", aggressive_nsec)
1158         else O_YNO(opt, "ignore-cd-flag", ignore_cd)
1159         else O_YNO(opt, "disable-edns-do", disable_edns_do)
1160         else O_YNO(opt, "serve-expired", serve_expired)
1161         else O_DEC(opt, "serve-expired-ttl", serve_expired_ttl)
1162         else O_YNO(opt, "serve-expired-ttl-reset", serve_expired_ttl_reset)
1163         else O_DEC(opt, "serve-expired-reply-ttl", serve_expired_reply_ttl)
1164         else O_DEC(opt, "serve-expired-client-timeout", serve_expired_client_timeout)
1165         else O_YNO(opt, "ede", ede)
1166         else O_YNO(opt, "ede-serve-expired", ede_serve_expired)
1167         else O_YNO(opt, "serve-original-ttl", serve_original_ttl)
1168         else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations)
1169         else O_YNO(opt, "zonemd-permissive-mode", zonemd_permissive_mode)
1170         else O_UNS(opt, "add-holddown", add_holddown)
1171         else O_UNS(opt, "del-holddown", del_holddown)
1172         else O_UNS(opt, "keep-missing", keep_missing)
1173         else O_YNO(opt, "permit-small-holddown", permit_small_holddown)
1174         else O_MEM(opt, "key-cache-size", key_cache_size)
1175         else O_DEC(opt, "key-cache-slabs", key_cache_slabs)
1176         else O_MEM(opt, "neg-cache-size", neg_cache_size)
1177         else O_YNO(opt, "control-enable", remote_control_enable)
1178         else O_DEC(opt, "control-port", control_port)
1179         else O_STR(opt, "server-key-file", server_key_file)
1180         else O_STR(opt, "server-cert-file", server_cert_file)
1181         else O_STR(opt, "control-key-file", control_key_file)
1182         else O_STR(opt, "control-cert-file", control_cert_file)
1183         else O_LST(opt, "root-hints", root_hints)
1184         else O_LS2(opt, "access-control", acls)
1185         else O_LS2(opt, "tcp-connection-limit", tcp_connection_limits)
1186         else O_LST(opt, "do-not-query-address", donotqueryaddrs)
1187         else O_LST(opt, "private-address", private_address)
1188         else O_LST(opt, "private-domain", private_domain)
1189         else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list)
1190         else O_LST(opt, "trust-anchor-file", trust_anchor_file_list)
1191         else O_LST(opt, "trust-anchor", trust_anchor_list)
1192         else O_LST(opt, "trusted-keys-file", trusted_keys_file_list)
1193         else O_YNO(opt, "trust-anchor-signaling", trust_anchor_signaling)
1194         else O_YNO(opt, "root-key-sentinel", root_key_sentinel)
1195         else O_LST(opt, "control-interface", control_ifs.first)
1196         else O_LST(opt, "domain-insecure", domain_insecure)
1197         else O_UNS(opt, "val-override-date", val_date_override)
1198         else O_YNO(opt, "minimal-responses", minimal_responses)
1199         else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
1200         else O_DEC(opt, "unknown-server-time-limit", unknown_server_time_limit)
1201 #ifdef CLIENT_SUBNET
1202         else O_LST(opt, "send-client-subnet", client_subnet)
1203         else O_LST(opt, "client-subnet-zone", client_subnet_zone)
1204         else O_DEC(opt, "max-client-subnet-ipv4", max_client_subnet_ipv4)
1205         else O_DEC(opt, "max-client-subnet-ipv6", max_client_subnet_ipv6)
1206         else O_DEC(opt, "min-client-subnet-ipv4", min_client_subnet_ipv4)
1207         else O_DEC(opt, "min-client-subnet-ipv6", min_client_subnet_ipv6)
1208         else O_DEC(opt, "max-ecs-tree-size-ipv4", max_ecs_tree_size_ipv4)
1209         else O_DEC(opt, "max-ecs-tree-size-ipv6", max_ecs_tree_size_ipv6)
1210         else O_YNO(opt, "client-subnet-always-forward:",
1211                 client_subnet_always_forward)
1212 #endif
1213 #ifdef USE_DNSTAP
1214         else O_YNO(opt, "dnstap-enable", dnstap)
1215         else O_YNO(opt, "dnstap-bidirectional", dnstap_bidirectional)
1216         else O_STR(opt, "dnstap-socket-path", dnstap_socket_path)
1217         else O_STR(opt, "dnstap-ip", dnstap_ip)
1218         else O_YNO(opt, "dnstap-tls", dnstap_tls)
1219         else O_STR(opt, "dnstap-tls-server-name", dnstap_tls_server_name)
1220         else O_STR(opt, "dnstap-tls-cert-bundle", dnstap_tls_cert_bundle)
1221         else O_STR(opt, "dnstap-tls-client-key-file",
1222                 dnstap_tls_client_key_file)
1223         else O_STR(opt, "dnstap-tls-client-cert-file",
1224                 dnstap_tls_client_cert_file)
1225         else O_YNO(opt, "dnstap-send-identity", dnstap_send_identity)
1226         else O_YNO(opt, "dnstap-send-version", dnstap_send_version)
1227         else O_STR(opt, "dnstap-identity", dnstap_identity)
1228         else O_STR(opt, "dnstap-version", dnstap_version)
1229         else O_YNO(opt, "dnstap-log-resolver-query-messages",
1230                 dnstap_log_resolver_query_messages)
1231         else O_YNO(opt, "dnstap-log-resolver-response-messages",
1232                 dnstap_log_resolver_response_messages)
1233         else O_YNO(opt, "dnstap-log-client-query-messages",
1234                 dnstap_log_client_query_messages)
1235         else O_YNO(opt, "dnstap-log-client-response-messages",
1236                 dnstap_log_client_response_messages)
1237         else O_YNO(opt, "dnstap-log-forwarder-query-messages",
1238                 dnstap_log_forwarder_query_messages)
1239         else O_YNO(opt, "dnstap-log-forwarder-response-messages",
1240                 dnstap_log_forwarder_response_messages)
1241 #endif
1242 #ifdef USE_DNSCRYPT
1243         else O_YNO(opt, "dnscrypt-enable", dnscrypt)
1244         else O_DEC(opt, "dnscrypt-port", dnscrypt_port)
1245         else O_STR(opt, "dnscrypt-provider", dnscrypt_provider)
1246         else O_LST(opt, "dnscrypt-provider-cert", dnscrypt_provider_cert)
1247         else O_LST(opt, "dnscrypt-provider-cert-rotated", dnscrypt_provider_cert_rotated)
1248         else O_LST(opt, "dnscrypt-secret-key", dnscrypt_secret_key)
1249         else O_MEM(opt, "dnscrypt-shared-secret-cache-size",
1250                 dnscrypt_shared_secret_cache_size)
1251         else O_DEC(opt, "dnscrypt-shared-secret-cache-slabs",
1252                 dnscrypt_shared_secret_cache_slabs)
1253         else O_MEM(opt, "dnscrypt-nonce-cache-size",
1254                 dnscrypt_nonce_cache_size)
1255         else O_DEC(opt, "dnscrypt-nonce-cache-slabs",
1256                 dnscrypt_nonce_cache_slabs)
1257 #endif
1258         else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones)
1259         else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones)
1260         else O_DEC(opt, "max-udp-size", max_udp_size)
1261         else O_LST(opt, "python-script", python_script)
1262         else O_LST(opt, "dynlib-file", dynlib_file)
1263         else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check)
1264         else O_DEC(opt, "ip-ratelimit-cookie", ip_ratelimit_cookie)
1265         else O_DEC(opt, "ip-ratelimit", ip_ratelimit)
1266         else O_DEC(opt, "ratelimit", ratelimit)
1267         else O_MEM(opt, "ip-ratelimit-size", ip_ratelimit_size)
1268         else O_MEM(opt, "ratelimit-size", ratelimit_size)
1269         else O_DEC(opt, "ip-ratelimit-slabs", ip_ratelimit_slabs)
1270         else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs)
1271         else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain)
1272         else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain)
1273         else O_DEC(opt, "ip-ratelimit-factor", ip_ratelimit_factor)
1274         else O_DEC(opt, "ratelimit-factor", ratelimit_factor)
1275         else O_YNO(opt, "ip-ratelimit-backoff", ip_ratelimit_backoff)
1276         else O_YNO(opt, "ratelimit-backoff", ratelimit_backoff)
1277         else O_UNS(opt, "outbound-msg-retry", outbound_msg_retry)
1278         else O_UNS(opt, "max-sent-count", max_sent_count)
1279         else O_UNS(opt, "max-query-restarts", max_query_restarts)
1280         else O_DEC(opt, "fast-server-num", fast_server_num)
1281         else O_DEC(opt, "fast-server-permil", fast_server_permil)
1282         else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min)
1283         else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max)
1284         else O_DEC(opt, "val-max-restart", val_max_restart)
1285         else O_YNO(opt, "qname-minimisation", qname_minimisation)
1286         else O_YNO(opt, "qname-minimisation-strict", qname_minimisation_strict)
1287         else O_IFC(opt, "define-tag", num_tags, tagname)
1288         else O_LTG(opt, "local-zone-tag", local_zone_tags)
1289         else O_LTG(opt, "access-control-tag", acl_tags)
1290         else O_LTG(opt, "response-ip-tag", respip_tags)
1291         else O_LS3(opt, "local-zone-override", local_zone_overrides)
1292         else O_LS3(opt, "access-control-tag-action", acl_tag_actions)
1293         else O_LS3(opt, "access-control-tag-data", acl_tag_datas)
1294         else O_LS2(opt, "access-control-view", acl_view)
1295         else O_LS2(opt, "interface-action", interface_actions)
1296         else O_LTG(opt, "interface-tag", interface_tags)
1297         else O_LS3(opt, "interface-tag-action", interface_tag_actions)
1298         else O_LS3(opt, "interface-tag-data", interface_tag_datas)
1299         else O_LS2(opt, "interface-view", interface_view)
1300         else O_YNO(opt, "pad-responses", pad_responses)
1301         else O_DEC(opt, "pad-responses-block-size", pad_responses_block_size)
1302         else O_YNO(opt, "pad-queries", pad_queries)
1303         else O_DEC(opt, "pad-queries-block-size", pad_queries_block_size)
1304         else O_LS2(opt, "edns-client-strings", edns_client_strings)
1305         else O_LST(opt, "proxy-protocol-port", proxy_protocol_port)
1306 #ifdef USE_IPSECMOD
1307         else O_YNO(opt, "ipsecmod-enabled", ipsecmod_enabled)
1308         else O_YNO(opt, "ipsecmod-ignore-bogus", ipsecmod_ignore_bogus)
1309         else O_STR(opt, "ipsecmod-hook", ipsecmod_hook)
1310         else O_DEC(opt, "ipsecmod-max-ttl", ipsecmod_max_ttl)
1311         else O_LST(opt, "ipsecmod-whitelist", ipsecmod_whitelist)
1312         else O_YNO(opt, "ipsecmod-strict", ipsecmod_strict)
1313 #endif
1314 #ifdef USE_CACHEDB
1315         else O_STR(opt, "backend", cachedb_backend)
1316         else O_STR(opt, "secret-seed", cachedb_secret)
1317         else O_YNO(opt, "cachedb-no-store", cachedb_no_store)
1318 #ifdef USE_REDIS
1319         else O_STR(opt, "redis-server-host", redis_server_host)
1320         else O_DEC(opt, "redis-server-port", redis_server_port)
1321         else O_STR(opt, "redis-server-path", redis_server_path)
1322         else O_STR(opt, "redis-server-password", redis_server_password)
1323         else O_DEC(opt, "redis-timeout", redis_timeout)
1324         else O_YNO(opt, "redis-expire-records", redis_expire_records)
1325         else O_DEC(opt, "redis-logical-db", redis_logical_db)
1326 #endif  /* USE_REDIS */
1327 #endif  /* USE_CACHEDB */
1328 #ifdef USE_IPSET
1329         else O_STR(opt, "name-v4", ipset_name_v4)
1330         else O_STR(opt, "name-v6", ipset_name_v6)
1331 #endif
1332         /* not here:
1333          * outgoing-permit, outgoing-avoid - have list of ports
1334          * local-zone - zones and nodefault variables
1335          * local-data - see below
1336          * local-data-ptr - converted to local-data entries
1337          * stub-zone, name, stub-addr, stub-host, stub-prime
1338          * forward-zone, name, forward-addr, forward-host
1339          */
1340         else return 0;
1341         return 1;
1342 }
1343
1344 /** initialize the global cfg_parser object */
1345 static void
1346 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
1347 {
1348         static struct config_parser_state st;
1349         cfg_parser = &st;
1350         cfg_parser->filename = filename;
1351         cfg_parser->line = 1;
1352         cfg_parser->errors = 0;
1353         cfg_parser->cfg = cfg;
1354         cfg_parser->chroot = chroot;
1355         cfg_parser->started_toplevel = 0;
1356         init_cfg_parse();
1357 }
1358
1359 int
1360 config_read(struct config_file* cfg, const char* filename, const char* chroot)
1361 {
1362         FILE *in;
1363         char *fname = (char*)filename;
1364 #ifdef HAVE_GLOB
1365         glob_t g;
1366         size_t i;
1367         int r, flags;
1368 #endif
1369         if(!fname)
1370                 return 1;
1371
1372         /* check for wildcards */
1373 #ifdef HAVE_GLOB
1374         if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') &&
1375                 !strchr(fname, '{') && !strchr(fname, '~'))) {
1376                 verbose(VERB_QUERY, "wildcard found, processing %s", fname);
1377                 flags = 0
1378 #ifdef GLOB_ERR
1379                         | GLOB_ERR
1380 #endif
1381 #ifdef GLOB_NOSORT
1382                         | GLOB_NOSORT
1383 #endif
1384 #ifdef GLOB_BRACE
1385                         | GLOB_BRACE
1386 #endif
1387 #ifdef GLOB_TILDE
1388                         | GLOB_TILDE
1389 #endif
1390                 ;
1391                 memset(&g, 0, sizeof(g));
1392                 r = glob(fname, flags, NULL, &g);
1393                 if(r) {
1394                         /* some error */
1395                         globfree(&g);
1396                         if(r == GLOB_NOMATCH) {
1397                                 verbose(VERB_QUERY, "include: "
1398                                 "no matches for %s", fname);
1399                                 return 1;
1400                         } else if(r == GLOB_NOSPACE) {
1401                                 log_err("include: %s: "
1402                                         "fnametern out of memory", fname);
1403                         } else if(r == GLOB_ABORTED) {
1404                                 log_err("wildcard include: %s: expansion "
1405                                         "aborted (%s)", fname, strerror(errno));
1406                         } else {
1407                                 log_err("wildcard include: %s: expansion "
1408                                         "failed (%s)", fname, strerror(errno));
1409                         }
1410                         /* ignore globs that yield no files */
1411                         return 1;
1412                 }
1413                 /* process files found, if any */
1414                 for(i=0; i<(size_t)g.gl_pathc; i++) {
1415                         if(!config_read(cfg, g.gl_pathv[i], chroot)) {
1416                                 log_err("error reading wildcard "
1417                                         "include: %s", g.gl_pathv[i]);
1418                                 globfree(&g);
1419                                 return 0;
1420                         }
1421                 }
1422                 globfree(&g);
1423                 return 1;
1424         }
1425 #endif /* HAVE_GLOB */
1426
1427         in = fopen(fname, "r");
1428         if(!in) {
1429                 log_err("Could not open %s: %s", fname, strerror(errno));
1430                 return 0;
1431         }
1432         create_cfg_parser(cfg, fname, chroot);
1433         ub_c_in = in;
1434         ub_c_parse();
1435         fclose(in);
1436
1437         if(!cfg->dnscrypt) cfg->dnscrypt_port = 0;
1438
1439         if(cfg_parser->errors != 0) {
1440                 fprintf(stderr, "read %s failed: %d errors in configuration file\n",
1441                         fname, cfg_parser->errors);
1442                 errno=EINVAL;
1443                 return 0;
1444         }
1445
1446         return 1;
1447 }
1448
1449 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm)
1450 {
1451         struct config_stub* p = *(*pp);
1452         while(p) {
1453                 if(strcmp(p->name, nm) == 0)
1454                         return p;
1455                 (*pp) = &p->next;
1456                 p = p->next;
1457         }
1458         return NULL;
1459 }
1460
1461 void
1462 config_delstrlist(struct config_strlist* p)
1463 {
1464         struct config_strlist *np;
1465         while(p) {
1466                 np = p->next;
1467                 free(p->str);
1468                 free(p);
1469                 p = np;
1470         }
1471 }
1472
1473 void
1474 config_deldblstrlist(struct config_str2list* p)
1475 {
1476         struct config_str2list *np;
1477         while(p) {
1478                 np = p->next;
1479                 free(p->str);
1480                 free(p->str2);
1481                 free(p);
1482                 p = np;
1483         }
1484 }
1485
1486 void
1487 config_deltrplstrlist(struct config_str3list* p)
1488 {
1489         struct config_str3list *np;
1490         while(p) {
1491                 np = p->next;
1492                 free(p->str);
1493                 free(p->str2);
1494                 free(p->str3);
1495                 free(p);
1496                 p = np;
1497         }
1498 }
1499
1500 void
1501 config_delauth(struct config_auth* p)
1502 {
1503         if(!p) return;
1504         free(p->name);
1505         config_delstrlist(p->masters);
1506         config_delstrlist(p->urls);
1507         config_delstrlist(p->allow_notify);
1508         free(p->zonefile);
1509         free(p->rpz_taglist);
1510         free(p->rpz_action_override);
1511         free(p->rpz_cname);
1512         free(p->rpz_log_name);
1513         free(p);
1514 }
1515
1516 void
1517 config_delauths(struct config_auth* p)
1518 {
1519         struct config_auth* np;
1520         while(p) {
1521                 np = p->next;
1522                 config_delauth(p);
1523                 p = np;
1524         }
1525 }
1526
1527 void
1528 config_delstub(struct config_stub* p)
1529 {
1530         if(!p) return;
1531         free(p->name);
1532         config_delstrlist(p->hosts);
1533         config_delstrlist(p->addrs);
1534         free(p);
1535 }
1536
1537 void
1538 config_delstubs(struct config_stub* p)
1539 {
1540         struct config_stub* np;
1541         while(p) {
1542                 np = p->next;
1543                 config_delstub(p);
1544                 p = np;
1545         }
1546 }
1547
1548 void
1549 config_delview(struct config_view* p)
1550 {
1551         if(!p) return;
1552         free(p->name);
1553         config_deldblstrlist(p->local_zones);
1554         config_delstrlist(p->local_zones_nodefault);
1555 #ifdef USE_IPSET
1556         config_delstrlist(p->local_zones_ipset);
1557 #endif
1558         config_delstrlist(p->local_data);
1559         free(p);
1560 }
1561
1562 void
1563 config_delviews(struct config_view* p)
1564 {
1565         struct config_view* np;
1566         while(p) {
1567                 np = p->next;
1568                 config_delview(p);
1569                 p = np;
1570         }
1571 }
1572
1573 void
1574 config_del_strarray(char** array, int num)
1575 {
1576         int i;
1577         if(!array)
1578                 return;
1579         for(i=0; i<num; i++) {
1580                 free(array[i]);
1581         }
1582         free(array);
1583 }
1584
1585 void
1586 config_del_strbytelist(struct config_strbytelist* p)
1587 {
1588         struct config_strbytelist* np;
1589         while(p) {
1590                 np = p->next;
1591                 free(p->str);
1592                 free(p->str2);
1593                 free(p);
1594                 p = np;
1595         }
1596 }
1597
1598 void
1599 config_delete(struct config_file* cfg)
1600 {
1601         if(!cfg) return;
1602         free(cfg->username);
1603         free(cfg->chrootdir);
1604         free(cfg->directory);
1605         free(cfg->logfile);
1606         free(cfg->pidfile);
1607         free(cfg->if_automatic_ports);
1608         free(cfg->target_fetch_policy);
1609         free(cfg->ssl_service_key);
1610         free(cfg->ssl_service_pem);
1611         free(cfg->tls_cert_bundle);
1612         config_delstrlist(cfg->tls_additional_port);
1613         config_delstrlist(cfg->tls_session_ticket_keys.first);
1614         free(cfg->tls_ciphers);
1615         free(cfg->tls_ciphersuites);
1616         free(cfg->http_endpoint);
1617         if(cfg->log_identity) {
1618                 log_ident_revert_to_default();
1619                 free(cfg->log_identity);
1620         }
1621         config_del_strarray(cfg->ifs, cfg->num_ifs);
1622         config_del_strarray(cfg->out_ifs, cfg->num_out_ifs);
1623         config_delstubs(cfg->stubs);
1624         config_delstubs(cfg->forwards);
1625         config_delauths(cfg->auths);
1626         config_delviews(cfg->views);
1627         config_delstrlist(cfg->donotqueryaddrs);
1628         config_delstrlist(cfg->root_hints);
1629 #ifdef CLIENT_SUBNET
1630         config_delstrlist(cfg->client_subnet);
1631         config_delstrlist(cfg->client_subnet_zone);
1632 #endif
1633         free(cfg->identity);
1634         free(cfg->version);
1635         free(cfg->http_user_agent);
1636         free(cfg->nsid_cfg_str);
1637         free(cfg->nsid);
1638         free(cfg->module_conf);
1639         free(cfg->outgoing_avail_ports);
1640         config_delstrlist(cfg->caps_whitelist);
1641         config_delstrlist(cfg->private_address);
1642         config_delstrlist(cfg->private_domain);
1643         config_delstrlist(cfg->auto_trust_anchor_file_list);
1644         config_delstrlist(cfg->trust_anchor_file_list);
1645         config_delstrlist(cfg->trusted_keys_file_list);
1646         config_delstrlist(cfg->trust_anchor_list);
1647         config_delstrlist(cfg->domain_insecure);
1648         config_deldblstrlist(cfg->acls);
1649         config_deldblstrlist(cfg->tcp_connection_limits);
1650         free(cfg->val_nsec3_key_iterations);
1651         config_deldblstrlist(cfg->local_zones);
1652         config_delstrlist(cfg->local_zones_nodefault);
1653 #ifdef USE_IPSET
1654         config_delstrlist(cfg->local_zones_ipset);
1655 #endif
1656         config_delstrlist(cfg->local_data);
1657         config_deltrplstrlist(cfg->local_zone_overrides);
1658         config_del_strarray(cfg->tagname, cfg->num_tags);
1659         config_del_strbytelist(cfg->local_zone_tags);
1660         config_del_strbytelist(cfg->respip_tags);
1661         config_deldblstrlist(cfg->acl_view);
1662         config_del_strbytelist(cfg->acl_tags);
1663         config_deltrplstrlist(cfg->acl_tag_actions);
1664         config_deltrplstrlist(cfg->acl_tag_datas);
1665         config_deldblstrlist(cfg->interface_actions);
1666         config_deldblstrlist(cfg->interface_view);
1667         config_del_strbytelist(cfg->interface_tags);
1668         config_deltrplstrlist(cfg->interface_tag_actions);
1669         config_deltrplstrlist(cfg->interface_tag_datas);
1670         config_delstrlist(cfg->control_ifs.first);
1671         free(cfg->server_key_file);
1672         free(cfg->server_cert_file);
1673         free(cfg->control_key_file);
1674         free(cfg->control_cert_file);
1675         free(cfg->nat64_prefix);
1676         free(cfg->dns64_prefix);
1677         config_delstrlist(cfg->dns64_ignore_aaaa);
1678         free(cfg->dnstap_socket_path);
1679         free(cfg->dnstap_ip);
1680         free(cfg->dnstap_tls_server_name);
1681         free(cfg->dnstap_tls_cert_bundle);
1682         free(cfg->dnstap_tls_client_key_file);
1683         free(cfg->dnstap_tls_client_cert_file);
1684         free(cfg->dnstap_identity);
1685         free(cfg->dnstap_version);
1686         config_deldblstrlist(cfg->ratelimit_for_domain);
1687         config_deldblstrlist(cfg->ratelimit_below_domain);
1688         config_delstrlist(cfg->python_script);
1689         config_delstrlist(cfg->dynlib_file);
1690         config_deldblstrlist(cfg->edns_client_strings);
1691         config_delstrlist(cfg->proxy_protocol_port);
1692 #ifdef USE_IPSECMOD
1693         free(cfg->ipsecmod_hook);
1694         config_delstrlist(cfg->ipsecmod_whitelist);
1695 #endif
1696 #ifdef USE_CACHEDB
1697         free(cfg->cachedb_backend);
1698         free(cfg->cachedb_secret);
1699 #ifdef USE_REDIS
1700         free(cfg->redis_server_host);
1701         free(cfg->redis_server_path);
1702         free(cfg->redis_server_password);
1703 #endif  /* USE_REDIS */
1704 #endif  /* USE_CACHEDB */
1705 #ifdef USE_IPSET
1706         free(cfg->ipset_name_v4);
1707         free(cfg->ipset_name_v6);
1708 #endif
1709         free(cfg);
1710 }
1711
1712 static void
1713 init_cookie_secret(uint8_t* cookie_secret, size_t cookie_secret_len)
1714 {
1715         struct ub_randstate *rand = ub_initstate(NULL);
1716
1717         if (!rand)
1718                 fatal_exit("could not init random generator");
1719         while (cookie_secret_len) {
1720                 *cookie_secret++ = (uint8_t)ub_random(rand);
1721                 cookie_secret_len--;
1722         }
1723         ub_randfree(rand);
1724 }
1725
1726 static void
1727 init_outgoing_availports(int* a, int num)
1728 {
1729         /* generated with make iana_update */
1730         const int iana_assigned[] = {
1731 #include "util/iana_ports.inc"
1732                 -1 }; /* end marker to put behind trailing comma */
1733
1734         int i;
1735         /* do not use <1024, that could be trouble with the system, privs */
1736         for(i=1024; i<num; i++) {
1737                 a[i] = i;
1738         }
1739         /* create empty spot at 49152 to keep ephemeral ports available
1740          * to other programs */
1741         for(i=49152; i<49152+256; i++)
1742                 a[i] = 0;
1743         /* pick out all the IANA assigned ports */
1744         for(i=0; iana_assigned[i]!=-1; i++) {
1745                 if(iana_assigned[i] < num)
1746                         a[iana_assigned[i]] = 0;
1747         }
1748 }
1749
1750 int
1751 cfg_mark_ports(const char* str, int allow, int* avail, int num)
1752 {
1753         char* mid = strchr(str, '-');
1754 #ifdef DISABLE_EXPLICIT_PORT_RANDOMISATION
1755         log_warn("Explicit port randomisation disabled, ignoring "
1756                 "outgoing-port-permit and outgoing-port-avoid configuration "
1757                 "options");
1758 #endif
1759         if(!mid) {
1760                 int port = atoi(str);
1761                 if(port == 0 && strcmp(str, "0") != 0) {
1762                         log_err("cannot parse port number '%s'", str);
1763                         return 0;
1764                 }
1765                 if(port < num)
1766                         avail[port] = (allow?port:0);
1767         } else {
1768                 int i, low, high = atoi(mid+1);
1769                 char buf[16];
1770                 if(high == 0 && strcmp(mid+1, "0") != 0) {
1771                         log_err("cannot parse port number '%s'", mid+1);
1772                         return 0;
1773                 }
1774                 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) {
1775                         log_err("cannot parse port number '%s'", str);
1776                         return 0;
1777                 }
1778                 if(mid > str)
1779                         memcpy(buf, str, (size_t)(mid-str));
1780                 buf[mid-str] = 0;
1781                 low = atoi(buf);
1782                 if(low == 0 && strcmp(buf, "0") != 0) {
1783                         log_err("cannot parse port number '%s'", buf);
1784                         return 0;
1785                 }
1786                 for(i=low; i<=high; i++) {
1787                         if(i < num)
1788                                 avail[i] = (allow?i:0);
1789                 }
1790                 return 1;
1791         }
1792         return 1;
1793 }
1794
1795 int
1796 cfg_scan_ports(int* avail, int num)
1797 {
1798         int i;
1799         int count = 0;
1800         for(i=0; i<num; i++) {
1801                 if(avail[i])
1802                         count++;
1803         }
1804         return count;
1805 }
1806
1807 int cfg_condense_ports(struct config_file* cfg, int** avail)
1808 {
1809         int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536);
1810         int i, at = 0;
1811         *avail = NULL;
1812         if(num == 0)
1813                 return 0;
1814         *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int));
1815         if(!*avail)
1816                 return 0;
1817         for(i=0; i<65536; i++) {
1818                 if(cfg->outgoing_avail_ports[i])
1819                         (*avail)[at++] = cfg->outgoing_avail_ports[i];
1820         }
1821         log_assert(at == num);
1822         return num;
1823 }
1824
1825 void cfg_apply_local_port_policy(struct config_file* cfg, int num) {
1826 (void)cfg;
1827 (void)num;
1828 #ifdef USE_LINUX_IP_LOCAL_PORT_RANGE
1829         {
1830                 int i = 0;
1831                 FILE* range_fd;
1832                 if ((range_fd = fopen(LINUX_IP_LOCAL_PORT_RANGE_PATH, "r")) != NULL) {
1833                         int min_port = 0;
1834                         int max_port = num - 1;
1835                         if (fscanf(range_fd, "%d %d", &min_port, &max_port) == 2) {
1836                                 for(i=0; i<min_port; i++) {
1837                                         cfg->outgoing_avail_ports[i] = 0;
1838                                 }
1839                                 for(i=max_port+1; i<num; i++) {
1840                                         cfg->outgoing_avail_ports[i] = 0;
1841                                 }
1842                         } else {
1843                                 log_err("unexpected port range in %s",
1844                                                 LINUX_IP_LOCAL_PORT_RANGE_PATH);
1845                         }
1846                         fclose(range_fd);
1847                 } else {
1848                         log_err("failed to read from file: %s (%s)",
1849                                         LINUX_IP_LOCAL_PORT_RANGE_PATH,
1850                                         strerror(errno));
1851                 }
1852         }
1853 #endif
1854 }
1855
1856 /** print error with file and line number */
1857 static void ub_c_error_va_list(const char *fmt, va_list args)
1858 {
1859         cfg_parser->errors++;
1860         fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
1861         cfg_parser->line);
1862         vfprintf(stderr, fmt, args);
1863         fprintf(stderr, "\n");
1864 }
1865
1866 /** print error with file and line number */
1867 void ub_c_error_msg(const char* fmt, ...)
1868 {
1869         va_list args;
1870         va_start(args, fmt);
1871         ub_c_error_va_list(fmt, args);
1872         va_end(args);
1873 }
1874
1875 void ub_c_error(const char *str)
1876 {
1877         cfg_parser->errors++;
1878         if(strcmp(str, "syntax error")==0 && cfg_parser->started_toplevel ==0)
1879                 str = "syntax error, is there no section start after an "
1880                         "include-toplevel directive perhaps.";
1881         fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
1882                 cfg_parser->line, str);
1883 }
1884
1885 int ub_c_wrap(void)
1886 {
1887         return 1;
1888 }
1889
1890 int cfg_strlist_append(struct config_strlist_head* list, char* item)
1891 {
1892         struct config_strlist *s;
1893         if(!item || !list) {
1894                 free(item);
1895                 return 0;
1896         }
1897         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1898         if(!s) {
1899                 free(item);
1900                 return 0;
1901         }
1902         s->str = item;
1903         s->next = NULL;
1904         if(list->last)
1905                 list->last->next = s;
1906         else
1907                 list->first = s;
1908         list->last = s;
1909         return 1;
1910 }
1911
1912 int
1913 cfg_region_strlist_insert(struct regional* region,
1914         struct config_strlist** head, char* item)
1915 {
1916         struct config_strlist *s;
1917         if(!item || !head)
1918                 return 0;
1919         s = (struct config_strlist*)regional_alloc_zero(region,
1920                 sizeof(struct config_strlist));
1921         if(!s)
1922                 return 0;
1923         s->str = item;
1924         s->next = *head;
1925         *head = s;
1926         return 1;
1927 }
1928
1929 struct config_strlist*
1930 cfg_strlist_find(struct config_strlist* head, const char *item)
1931 {
1932         struct config_strlist *s = head;
1933         if(!head){
1934                 return NULL;
1935         }
1936         while(s) {
1937                 if(strcmp(s->str, item) == 0) {
1938                         return s;
1939                 }
1940                 s = s->next;
1941         }
1942         return NULL;
1943 }
1944
1945 int
1946 cfg_strlist_insert(struct config_strlist** head, char* item)
1947 {
1948         struct config_strlist *s;
1949         if(!item || !head) {
1950                 free(item);
1951                 return 0;
1952         }
1953         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1954         if(!s) {
1955                 free(item);
1956                 return 0;
1957         }
1958         s->str = item;
1959         s->next = *head;
1960         *head = s;
1961         return 1;
1962 }
1963
1964 int
1965 cfg_strlist_append_ex(struct config_strlist** head, char* item)
1966 {
1967         struct config_strlist *s;
1968         if(!item || !head)
1969                 return 0;
1970         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1971         if(!s)
1972                 return 0;
1973         s->str = item;
1974         s->next = NULL;
1975
1976         if (*head==NULL) {
1977                 *head = s;
1978         } else {
1979                 struct config_strlist *last = *head;
1980                 while (last->next!=NULL) {
1981                     last = last->next;
1982                 }
1983                 last->next = s;
1984         }
1985
1986         return 1;
1987 }
1988
1989 int
1990 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
1991 {
1992         struct config_str2list *s;
1993         if(!item || !i2 || !head) {
1994                 free(item);
1995                 free(i2);
1996                 return 0;
1997         }
1998         s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
1999         if(!s) {
2000                 free(item);
2001                 free(i2);
2002                 return 0;
2003         }
2004         s->str = item;
2005         s->str2 = i2;
2006         s->next = *head;
2007         *head = s;
2008         return 1;
2009 }
2010
2011 int
2012 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2,
2013         char* i3)
2014 {
2015         struct config_str3list *s;
2016         if(!item || !i2 || !i3 || !head)
2017                 return 0;
2018         s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list));
2019         if(!s)
2020                 return 0;
2021         s->str = item;
2022         s->str2 = i2;
2023         s->str3 = i3;
2024         s->next = *head;
2025         *head = s;
2026         return 1;
2027 }
2028
2029 int
2030 cfg_strbytelist_insert(struct config_strbytelist** head, char* item,
2031         uint8_t* i2, size_t i2len)
2032 {
2033         struct config_strbytelist* s;
2034         if(!item || !i2 || !head)
2035                 return 0;
2036         s = (struct config_strbytelist*)calloc(1, sizeof(*s));
2037         if(!s)
2038                 return 0;
2039         s->str = item;
2040         s->str2 = i2;
2041         s->str2len = i2len;
2042         s->next = *head;
2043         *head = s;
2044         return 1;
2045 }
2046
2047 time_t
2048 cfg_convert_timeval(const char* str)
2049 {
2050         time_t t;
2051         struct tm tm;
2052         memset(&tm, 0, sizeof(tm));
2053         if(strlen(str) < 14)
2054                 return 0;
2055         if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
2056                 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
2057                 return 0;
2058         tm.tm_year -= 1900;
2059         tm.tm_mon--;
2060         /* Check values */
2061         if (tm.tm_year < 70)    return 0;
2062         if (tm.tm_mon < 0 || tm.tm_mon > 11)    return 0;
2063         if (tm.tm_mday < 1 || tm.tm_mday > 31)  return 0;
2064         if (tm.tm_hour < 0 || tm.tm_hour > 23)  return 0;
2065         if (tm.tm_min < 0 || tm.tm_min > 59)    return 0;
2066         if (tm.tm_sec < 0 || tm.tm_sec > 59)    return 0;
2067         /* call ldns conversion function */
2068         t = sldns_mktime_from_utc(&tm);
2069         return t;
2070 }
2071
2072 int
2073 cfg_count_numbers(const char* s)
2074 {
2075         /* format ::= (sp num)+ sp  */
2076         /* num ::= [-](0-9)+        */
2077         /* sp ::= (space|tab)*      */
2078         int num = 0;
2079         while(*s) {
2080                 while(*s && isspace((unsigned char)*s))
2081                         s++;
2082                 if(!*s) /* end of string */
2083                         break;
2084                 if(*s == '-')
2085                         s++;
2086                 if(!*s) /* only - not allowed */
2087                         return 0;
2088                 if(!isdigit((unsigned char)*s)) /* bad character */
2089                         return 0;
2090                 while(*s && isdigit((unsigned char)*s))
2091                         s++;
2092                 num++;
2093         }
2094         return num;
2095 }
2096
2097 /** all digit number */
2098 static int isalldigit(const char* str, size_t l)
2099 {
2100         size_t i;
2101         for(i=0; i<l; i++)
2102                 if(!isdigit((unsigned char)str[i]))
2103                         return 0;
2104         return 1;
2105 }
2106
2107 int
2108 cfg_parse_memsize(const char* str, size_t* res)
2109 {
2110         size_t len;
2111         size_t mult = 1;
2112         if(!str || (len=(size_t)strlen(str)) == 0) {
2113                 log_err("not a size: '%s'", str);
2114                 return 0;
2115         }
2116         if(isalldigit(str, len)) {
2117                 *res = (size_t)atol(str);
2118                 return 1;
2119         }
2120         /* check appended num */
2121         while(len>0 && str[len-1]==' ')
2122                 len--;
2123         if(len > 1 && str[len-1] == 'b')
2124                 len--;
2125         else if(len > 1 && str[len-1] == 'B')
2126                 len--;
2127
2128         if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
2129                 mult = 1024*1024*1024;
2130         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
2131                 mult = 1024*1024;
2132         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k')
2133                 mult = 1024;
2134         else if(len > 0 && isdigit((unsigned char)str[len-1]))
2135                 mult = 1;
2136         else {
2137                 log_err("unknown size specifier: '%s'", str);
2138                 return 0;
2139         }
2140         while(len>1 && str[len-2]==' ')
2141                 len--;
2142
2143         if(!isalldigit(str, len-1)) {
2144                 log_err("unknown size specifier: '%s'", str);
2145                 return 0;
2146         }
2147         *res = ((size_t)atol(str)) * mult;
2148         return 1;
2149 }
2150
2151 int
2152 find_tag_id(struct config_file* cfg, const char* tag)
2153 {
2154         int i;
2155         for(i=0; i<cfg->num_tags; i++) {
2156                 if(strcmp(cfg->tagname[i], tag) == 0)
2157                         return i;
2158         }
2159         return -1;
2160 }
2161
2162 int
2163 config_add_tag(struct config_file* cfg, const char* tag)
2164 {
2165         char** newarray;
2166         char* newtag;
2167         if(find_tag_id(cfg, tag) != -1)
2168                 return 1; /* nothing to do */
2169         newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1));
2170         if(!newarray)
2171                 return 0;
2172         newtag = strdup(tag);
2173         if(!newtag) {
2174                 free(newarray);
2175                 return 0;
2176         }
2177         if(cfg->tagname) {
2178                 memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags);
2179                 free(cfg->tagname);
2180         }
2181         newarray[cfg->num_tags++] = newtag;
2182         cfg->tagname = newarray;
2183         return 1;
2184 }
2185
2186 /** set a bit in a bit array */
2187 static void
2188 cfg_set_bit(uint8_t* bitlist, size_t len, int id)
2189 {
2190         int pos = id/8;
2191         log_assert((size_t)pos < len);
2192         (void)len;
2193         bitlist[pos] |= 1<<(id%8);
2194 }
2195
2196 uint8_t* config_parse_taglist(struct config_file* cfg, char* str,
2197         size_t* listlen)
2198 {
2199         uint8_t* taglist = NULL;
2200         size_t len = 0;
2201         char* p, *s;
2202
2203         /* allocate */
2204         if(cfg->num_tags == 0) {
2205                 log_err("parse taglist, but no tags defined");
2206                 return 0;
2207         }
2208         len = (size_t)(cfg->num_tags+7)/8;
2209         taglist = calloc(1, len);
2210         if(!taglist) {
2211                 log_err("out of memory");
2212                 return 0;
2213         }
2214
2215         /* parse */
2216         s = str;
2217         while((p=strsep(&s, " \t\n")) != NULL) {
2218                 if(*p) {
2219                         int id = find_tag_id(cfg, p);
2220                         /* set this bit in the bitlist */
2221                         if(id == -1) {
2222                                 log_err("unknown tag: %s", p);
2223                                 free(taglist);
2224                                 return 0;
2225                         }
2226                         cfg_set_bit(taglist, len, id);
2227                 }
2228         }
2229
2230         *listlen = len;
2231         return taglist;
2232 }
2233
2234 uint8_t* cfg_parse_nsid(const char* str, uint16_t* nsid_len)
2235 {
2236         uint8_t* nsid = NULL;
2237
2238         if (strncasecmp(str, "ascii_", 6) == 0) {
2239                 if ((nsid = (uint8_t *)strdup(str + 6)))
2240                         *nsid_len = strlen(str + 6);
2241
2242         } else if (strlen(str) % 2) {
2243                 ; /* hex string has even number of characters */
2244         }
2245
2246         else if (*str && (nsid = calloc(1, strlen(str) / 2))) {
2247                 const char *ch;
2248                 uint8_t *dp;
2249
2250                 for ( ch = str, dp = nsid
2251                     ; isxdigit(ch[0]) && isxdigit(ch[1])
2252                     ; ch += 2, dp++) {
2253                         *dp  = (uint8_t)sldns_hexdigit_to_int(ch[0]) * 16;
2254                         *dp += (uint8_t)sldns_hexdigit_to_int(ch[1]);
2255                 }
2256                 if (*ch) {
2257                         free(nsid);
2258                         nsid = NULL;
2259                 } else
2260                         *nsid_len = strlen(str) / 2;
2261         }
2262         return nsid;
2263 }
2264
2265
2266 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist,
2267         size_t taglen)
2268 {
2269         char buf[10240];
2270         size_t i, j, len = 0;
2271         buf[0] = 0;
2272         for(i=0; i<taglen; i++) {
2273                 if(taglist[i] == 0)
2274                         continue;
2275                 for(j=0; j<8; j++) {
2276                         if((taglist[i] & (1<<j)) != 0) {
2277                                 size_t id = i*8 + j;
2278                                 snprintf(buf+len, sizeof(buf)-len, "%s%s",
2279                                         (len==0?"":" "), cfg->tagname[id]);
2280                                 len += strlen(buf+len);
2281                         }
2282                 }
2283         }
2284         return strdup(buf);
2285 }
2286
2287 int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2,
2288         size_t list2len)
2289 {
2290         size_t i;
2291         if(!list1 || !list2)
2292                 return 0;
2293         for(i=0; i<list1len && i<list2len; i++) {
2294                 if((list1[i] & list2[i]) != 0)
2295                         return 1;
2296         }
2297         return 0;
2298 }
2299
2300 void
2301 config_apply(struct config_file* config)
2302 {
2303         MAX_TTL = (time_t)config->max_ttl;
2304         MIN_TTL = (time_t)config->min_ttl;
2305         SERVE_EXPIRED = config->serve_expired;
2306         SERVE_EXPIRED_TTL = (time_t)config->serve_expired_ttl;
2307         SERVE_EXPIRED_REPLY_TTL = (time_t)config->serve_expired_reply_ttl;
2308         SERVE_ORIGINAL_TTL = config->serve_original_ttl;
2309         MAX_NEG_TTL = (time_t)config->max_negative_ttl;
2310         RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
2311         RTT_MAX_TIMEOUT = config->infra_cache_max_rtt;
2312         EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
2313         MINIMAL_RESPONSES = config->minimal_responses;
2314         RRSET_ROUNDROBIN = config->rrset_roundrobin;
2315         LOG_TAG_QUERYREPLY = config->log_tag_queryreply;
2316         UNKNOWN_SERVER_NICENESS = config->unknown_server_time_limit;
2317         USEFUL_SERVER_TOP_TIMEOUT = RTT_MAX_TIMEOUT;
2318         BLACKLIST_PENALTY = USEFUL_SERVER_TOP_TIMEOUT*4;
2319         log_set_time_asc(config->log_time_ascii);
2320         autr_permit_small_holddown = config->permit_small_holddown;
2321         stream_wait_max = config->stream_wait_size;
2322         http2_query_buffer_max = config->http_query_buffer_size;
2323         http2_response_buffer_max = config->http_response_buffer_size;
2324 }
2325
2326 void config_lookup_uid(struct config_file* cfg)
2327 {
2328 #ifdef HAVE_GETPWNAM
2329         /* translate username into uid and gid */
2330         if(cfg->username && cfg->username[0]) {
2331                 struct passwd *pwd;
2332                 if((pwd = getpwnam(cfg->username)) != NULL) {
2333                         cfg_uid = pwd->pw_uid;
2334                         cfg_gid = pwd->pw_gid;
2335                 }
2336         }
2337 #else
2338         (void)cfg;
2339 #endif
2340 }
2341
2342 /**
2343  * Calculate string length of full pathname in original filesys
2344  * @param fname: the path name to convert.
2345  *      Must not be null or empty.
2346  * @param cfg: config struct for chroot and chdir (if set).
2347  * @param use_chdir: if false, only chroot is applied.
2348  * @return length of string.
2349  *      remember to allocate one more for 0 at end in mallocs.
2350  */
2351 static size_t
2352 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2353 {
2354         size_t len = 0;
2355         int slashit = 0;
2356         if(cfg->chrootdir && cfg->chrootdir[0] &&
2357                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2358                 /* already full pathname, return it */
2359                 return strlen(fname);
2360         }
2361         /* chroot */
2362         if(cfg->chrootdir && cfg->chrootdir[0]) {
2363                 /* start with chrootdir */
2364                 len += strlen(cfg->chrootdir);
2365                 slashit = 1;
2366         }
2367         /* chdir */
2368 #ifdef UB_ON_WINDOWS
2369         if(fname[0] != 0 && fname[1] == ':') {
2370                 /* full path, no chdir */
2371         } else
2372 #endif
2373         if(fname[0] == '/' || !use_chdir) {
2374                 /* full path, no chdir */
2375         } else if(cfg->directory && cfg->directory[0]) {
2376                 /* prepend chdir */
2377                 if(slashit && cfg->directory[0] != '/')
2378                         len++;
2379                 if(cfg->chrootdir && cfg->chrootdir[0] &&
2380                         strncmp(cfg->chrootdir, cfg->directory,
2381                         strlen(cfg->chrootdir)) == 0)
2382                         len += strlen(cfg->directory)-strlen(cfg->chrootdir);
2383                 else    len += strlen(cfg->directory);
2384                 slashit = 1;
2385         }
2386         /* fname */
2387         if(slashit && fname[0] != '/')
2388                 len++;
2389         len += strlen(fname);
2390         return len;
2391 }
2392
2393 char*
2394 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2395 {
2396         size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1;
2397         int slashit = 0;
2398         char* buf = (char*)malloc(len);
2399         if(!buf)
2400                 return NULL;
2401         buf[0] = 0;
2402         /* is fname already in chroot ? */
2403         if(cfg->chrootdir && cfg->chrootdir[0] &&
2404                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2405                 /* already full pathname, return it */
2406                 (void)strlcpy(buf, fname, len);
2407                 buf[len-1] = 0;
2408                 return buf;
2409         }
2410         /* chroot */
2411         if(cfg->chrootdir && cfg->chrootdir[0]) {
2412                 /* start with chrootdir */
2413                 (void)strlcpy(buf, cfg->chrootdir, len);
2414                 slashit = 1;
2415         }
2416 #ifdef UB_ON_WINDOWS
2417         if(fname[0] != 0 && fname[1] == ':') {
2418                 /* full path, no chdir */
2419         } else
2420 #endif
2421         /* chdir */
2422         if(fname[0] == '/' || !use_chdir) {
2423                 /* full path, no chdir */
2424         } else if(cfg->directory && cfg->directory[0]) {
2425                 /* prepend chdir */
2426                 if(slashit && cfg->directory[0] != '/')
2427                         (void)strlcat(buf, "/", len);
2428                 /* is the directory already in the chroot? */
2429                 if(cfg->chrootdir && cfg->chrootdir[0] &&
2430                         strncmp(cfg->chrootdir, cfg->directory,
2431                         strlen(cfg->chrootdir)) == 0)
2432                         (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
2433                                    len);
2434                 else (void)strlcat(buf, cfg->directory, len);
2435                 slashit = 1;
2436         }
2437         /* fname */
2438         if(slashit && fname[0] != '/')
2439                 (void)strlcat(buf, "/", len);
2440         (void)strlcat(buf, fname, len);
2441         buf[len-1] = 0;
2442         return buf;
2443 }
2444
2445 /** return next space character in string */
2446 static char* next_space_pos(const char* str)
2447 {
2448         char* sp = strchr(str, ' ');
2449         char* tab = strchr(str, '\t');
2450         if(!tab && !sp)
2451                 return NULL;
2452         if(!sp) return tab;
2453         if(!tab) return sp;
2454         return (sp<tab)?sp:tab;
2455 }
2456
2457 /** return last space character in string */
2458 static char* last_space_pos(const char* str)
2459 {
2460         char* sp = strrchr(str, ' ');
2461         char* tab = strrchr(str, '\t');
2462         if(!tab && !sp)
2463                 return NULL;
2464         if(!sp) return tab;
2465         if(!tab) return sp;
2466         return (sp>tab)?sp:tab;
2467 }
2468
2469 int
2470 cfg_parse_local_zone(struct config_file* cfg, const char* val)
2471 {
2472         const char *type, *name_end, *name;
2473         char buf[256];
2474
2475         /* parse it as: [zone_name] [between stuff] [zone_type] */
2476         name = val;
2477         while(*name && isspace((unsigned char)*name))
2478                 name++;
2479         if(!*name) {
2480                 log_err("syntax error: too short: %s", val);
2481                 return 0;
2482         }
2483         name_end = next_space_pos(name);
2484         if(!name_end || !*name_end) {
2485                 log_err("syntax error: expected zone type: %s", val);
2486                 return 0;
2487         }
2488         if (name_end - name > 255) {
2489                 log_err("syntax error: bad zone name: %s", val);
2490                 return 0;
2491         }
2492         (void)strlcpy(buf, name, sizeof(buf));
2493         buf[name_end-name] = '\0';
2494
2495         type = last_space_pos(name_end);
2496         while(type && *type && isspace((unsigned char)*type))
2497                 type++;
2498         if(!type || !*type) {
2499                 log_err("syntax error: expected zone type: %s", val);
2500                 return 0;
2501         }
2502
2503         if(strcmp(type, "nodefault")==0) {
2504                 return cfg_strlist_insert(&cfg->local_zones_nodefault,
2505                         strdup(name));
2506 #ifdef USE_IPSET
2507         } else if(strcmp(type, "ipset")==0) {
2508                 return cfg_strlist_insert(&cfg->local_zones_ipset,
2509                         strdup(name));
2510 #endif
2511         } else {
2512                 return cfg_str2list_insert(&cfg->local_zones, strdup(buf),
2513                         strdup(type));
2514         }
2515 }
2516
2517 char* cfg_ptr_reverse(char* str)
2518 {
2519         char* ip, *ip_end;
2520         char* name;
2521         char* result;
2522         char buf[1024];
2523         struct sockaddr_storage addr;
2524         socklen_t addrlen;
2525
2526         /* parse it as: [IP] [between stuff] [name] */
2527         ip = str;
2528         while(*ip && isspace((unsigned char)*ip))
2529                 ip++;
2530         if(!*ip) {
2531                 log_err("syntax error: too short: %s", str);
2532                 return NULL;
2533         }
2534         ip_end = next_space_pos(ip);
2535         if(!ip_end || !*ip_end) {
2536                 log_err("syntax error: expected name: %s", str);
2537                 return NULL;
2538         }
2539
2540         name = last_space_pos(ip_end);
2541         if(!name || !*name) {
2542                 log_err("syntax error: expected name: %s", str);
2543                 return NULL;
2544         }
2545
2546         sscanf(ip, "%100s", buf);
2547         buf[sizeof(buf)-1]=0;
2548
2549         if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) {
2550                 log_err("syntax error: cannot parse address: %s", str);
2551                 return NULL;
2552         }
2553
2554         /* reverse IPv4:
2555          * ddd.ddd.ddd.ddd.in-addr-arpa.
2556          * IPv6: (h.){32}.ip6.arpa.  */
2557
2558         if(addr_is_ip6(&addr, addrlen)) {
2559                 uint8_t ad[16];
2560                 const char* hex = "0123456789abcdef";
2561                 char *p = buf;
2562                 int i;
2563                 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
2564                         sizeof(ad));
2565                 for(i=15; i>=0; i--) {
2566                         uint8_t b = ad[i];
2567                         *p++ = hex[ (b&0x0f) ];
2568                         *p++ = '.';
2569                         *p++ = hex[ (b&0xf0) >> 4 ];
2570                         *p++ = '.';
2571                 }
2572                 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
2573         } else {
2574                 uint8_t ad[4];
2575                 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
2576                         sizeof(ad));
2577                 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
2578                         (unsigned)ad[3], (unsigned)ad[2],
2579                         (unsigned)ad[1], (unsigned)ad[0]);
2580         }
2581
2582         /* printed the reverse address, now the between goop and name on end */
2583         while(*ip_end && isspace((unsigned char)*ip_end))
2584                 ip_end++;
2585         if(name>ip_end) {
2586                 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s",
2587                         (int)(name-ip_end), ip_end);
2588         }
2589         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name);
2590
2591         result = strdup(buf);
2592         if(!result) {
2593                 log_err("out of memory parsing %s", str);
2594                 return NULL;
2595         }
2596         return result;
2597 }
2598
2599 #ifdef UB_ON_WINDOWS
2600 char*
2601 w_lookup_reg_str(const char* key, const char* name)
2602 {
2603         HKEY hk = NULL;
2604         DWORD type = 0;
2605         BYTE buf[1024];
2606         DWORD len = (DWORD)sizeof(buf);
2607         LONG ret;
2608         char* result = NULL;
2609         ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
2610         if(ret == ERROR_FILE_NOT_FOUND)
2611                 return NULL; /* key does not exist */
2612         else if(ret != ERROR_SUCCESS) {
2613                 log_err("RegOpenKeyEx failed");
2614                 return NULL;
2615         }
2616         ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
2617         if(RegCloseKey(hk))
2618                 log_err("RegCloseKey");
2619         if(ret == ERROR_FILE_NOT_FOUND)
2620                 return NULL; /* name does not exist */
2621         else if(ret != ERROR_SUCCESS) {
2622                 log_err("RegQueryValueEx failed");
2623                 return NULL;
2624         }
2625         if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
2626                 buf[sizeof(buf)-1] = 0;
2627                 buf[sizeof(buf)-2] = 0; /* for multi_sz */
2628                 result = strdup((char*)buf);
2629                 if(!result) log_err("out of memory");
2630         }
2631         return result;
2632 }
2633
2634 void w_config_adjust_directory(struct config_file* cfg)
2635 {
2636         if(cfg->directory && cfg->directory[0]) {
2637                 TCHAR dirbuf[2*MAX_PATH+4];
2638                 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) {
2639                         /* get executable path, and if that contains
2640                          * directories, snip off the filename part */
2641                         dirbuf[0] = 0;
2642                         if(!GetModuleFileName(NULL, dirbuf, MAX_PATH))
2643                                 log_err("could not GetModuleFileName");
2644                         if(strrchr(dirbuf, '\\')) {
2645                                 (strrchr(dirbuf, '\\'))[0] = 0;
2646                         } else log_err("GetModuleFileName had no path");
2647                         if(dirbuf[0]) {
2648                                 /* adjust directory for later lookups to work*/
2649                                 free(cfg->directory);
2650                                 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1);
2651                         }
2652                 }
2653         }
2654 }
2655 #endif /* UB_ON_WINDOWS */
2656
2657 int options_remote_is_address(struct config_file* cfg)
2658 {
2659         if(!cfg->remote_control_enable) return 0;
2660         if(!cfg->control_ifs.first) return 1;
2661         if(!cfg->control_ifs.first->str) return 1;
2662         if(cfg->control_ifs.first->str[0] == 0) return 1;
2663         return (cfg->control_ifs.first->str[0] != '/');
2664 }
2665
2666 /** see if interface is https, its port number == the https port number */
2667 int
2668 if_is_https(const char* ifname, const char* port, int https_port)
2669 {
2670         char* p = strchr(ifname, '@');
2671         if(!p && atoi(port) == https_port)
2672                 return 1;
2673         if(p && atoi(p+1) == https_port)
2674                 return 1;
2675         return 0;
2676 }
2677
2678 /** see if config contains https turned on */
2679 int cfg_has_https(struct config_file* cfg)
2680 {
2681         int i;
2682         char portbuf[32];
2683         snprintf(portbuf, sizeof(portbuf), "%d", cfg->port);
2684         for(i = 0; i<cfg->num_ifs; i++) {
2685                 if(if_is_https(cfg->ifs[i], portbuf, cfg->https_port))
2686                         return 1;
2687         }
2688         return 0;
2689 }
2690
2691 /** see if interface is PROXYv2, its port number == the proxy port number */
2692 int
2693 if_is_pp2(const char* ifname, const char* port,
2694         struct config_strlist* proxy_protocol_port)
2695 {
2696         struct config_strlist* s;
2697         char* p = strchr(ifname, '@');
2698         for(s = proxy_protocol_port; s; s = s->next) {
2699                 if(p && atoi(p+1) == atoi(s->str))
2700                         return 1;
2701                 if(!p && atoi(port) == atoi(s->str))
2702                         return 1;
2703         }
2704         return 0;
2705 }
2706
2707 /** see if interface is DNSCRYPT, its port number == the dnscrypt port number */
2708 int
2709 if_is_dnscrypt(const char* ifname, const char* port, int dnscrypt_port)
2710 {
2711 #ifdef USE_DNSCRYPT
2712         return ((strchr(ifname, '@') &&
2713                 atoi(strchr(ifname, '@')+1) == dnscrypt_port) ||
2714                 (!strchr(ifname, '@') && atoi(port) == dnscrypt_port));
2715 #else
2716         (void)ifname;
2717         (void)port;
2718         (void)dnscrypt_port;
2719         return 0;
2720 #endif
2721 }