contrib/unbound/util/config_file.c

   1 /*
   2  * util/config_file.c - reads and stores the config file for unbound.
   3  *
   4  * Copyright (c) 2007, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file contains functions for the config file.
  40  */
  41
  42 #include "config.h"
  43 #include <ctype.h>
  44 #include <stdarg.h>
  45 #ifdef HAVE_TIME_H
  46 #include <time.h>
  47 #endif
  48 #include "util/log.h"
  49 #include "util/configyyrename.h"
  50 #include "util/config_file.h"
  51 #include "configparser.h"
  52 #include "util/net_help.h"
  53 #include "util/data/msgparse.h"
  54 #include "util/module.h"
  55 #include "util/regional.h"
  56 #include "util/fptr_wlist.h"
  57 #include "util/data/dname.h"
  58 #include "util/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->serve_expired = 0;
 275         cfg->serve_expired_ttl = 0;
 276         cfg->serve_expired_ttl_reset = 0;
 277         cfg->serve_expired_reply_ttl = 30;
 278         cfg->serve_expired_client_timeout = 0;
 279         cfg->ede_serve_expired = 0;
 280         cfg->serve_original_ttl = 0;
 281         cfg->zonemd_permissive_mode = 0;
 282         cfg->add_holddown = 30*24*3600;
 283         cfg->del_holddown = 30*24*3600;
 284         cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */
 285         cfg->permit_small_holddown = 0;
 286         cfg->key_cache_size = 4 * 1024 * 1024;
 287         cfg->key_cache_slabs = 4;
 288         cfg->neg_cache_size = 1 * 1024 * 1024;
 289         cfg->local_zones = NULL;
 290         cfg->local_zones_nodefault = NULL;
 291 #ifdef USE_IPSET
 292         cfg->local_zones_ipset = NULL;
 293 #endif
 294         cfg->local_zones_disable_default = 0;
 295         cfg->local_data = NULL;
 296         cfg->local_zone_overrides = NULL;
 297         cfg->unblock_lan_zones = 0;
 298         cfg->insecure_lan_zones = 0;
 299         cfg->python_script = NULL;
 300         cfg->dynlib_file = NULL;
 301         cfg->remote_control_enable = 0;
 302         cfg->control_ifs.first = NULL;
 303         cfg->control_ifs.last = NULL;
 304         cfg->control_port = UNBOUND_CONTROL_PORT;
 305         cfg->control_use_cert = 1;
 306         cfg->minimal_responses = 1;
 307         cfg->rrset_roundrobin = 1;
 308         cfg->unknown_server_time_limit = 376;
 309         cfg->max_udp_size = 1232; /* value taken from edns_buffer_size */
 310         if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
 311                 goto error_exit;
 312         if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
 313                 goto error_exit;
 314         if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
 315                 goto error_exit;
 316         if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
 317                 goto error_exit;
 318
 319 #ifdef CLIENT_SUBNET
 320         if(!(cfg->module_conf = strdup("subnetcache validator iterator"))) goto error_exit;
 321 #else
 322         if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
 323 #endif
 324         if(!(cfg->val_nsec3_key_iterations =
 325                 strdup("1024 150 2048 150 4096 150"))) goto error_exit;
 326 #if defined(DNSTAP_SOCKET_PATH)
 327         if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
 328                 goto error_exit;
 329 #endif
 330         cfg->dnstap_bidirectional = 1;
 331         cfg->dnstap_tls = 1;
 332         cfg->disable_dnssec_lame_check = 0;
 333         cfg->ip_ratelimit_cookie = 0;
 334         cfg->ip_ratelimit = 0;
 335         cfg->ratelimit = 0;
 336         cfg->ip_ratelimit_slabs = 4;
 337         cfg->ratelimit_slabs = 4;
 338         cfg->ip_ratelimit_size = 4*1024*1024;
 339         cfg->ratelimit_size = 4*1024*1024;
 340         cfg->ratelimit_for_domain = NULL;
 341         cfg->ratelimit_below_domain = NULL;
 342         cfg->ip_ratelimit_factor = 10;
 343         cfg->ratelimit_factor = 10;
 344         cfg->ip_ratelimit_backoff = 0;
 345         cfg->ratelimit_backoff = 0;
 346         cfg->outbound_msg_retry = 5;
 347         cfg->max_sent_count = 32;
 348         cfg->max_query_restarts = 11;
 349         cfg->qname_minimisation = 1;
 350         cfg->qname_minimisation_strict = 0;
 351         cfg->shm_enable = 0;
 352         cfg->shm_key = 11777;
 353         cfg->edns_client_strings = NULL;
 354         cfg->edns_client_string_opcode = 65001;
 355         cfg->dnscrypt = 0;
 356         cfg->dnscrypt_port = 0;
 357         cfg->dnscrypt_provider = NULL;
 358         cfg->dnscrypt_provider_cert = NULL;
 359         cfg->dnscrypt_provider_cert_rotated = NULL;
 360         cfg->dnscrypt_secret_key = NULL;
 361         cfg->dnscrypt_shared_secret_cache_size = 4*1024*1024;
 362         cfg->dnscrypt_shared_secret_cache_slabs = 4;
 363         cfg->dnscrypt_nonce_cache_size = 4*1024*1024;
 364         cfg->dnscrypt_nonce_cache_slabs = 4;
 365         cfg->pad_responses = 1;
 366         cfg->pad_responses_block_size = 468; /* from RFC8467 */
 367         cfg->pad_queries = 1;
 368         cfg->pad_queries_block_size = 128; /* from RFC8467 */
 369 #ifdef USE_IPSECMOD
 370         cfg->ipsecmod_enabled = 1;
 371         cfg->ipsecmod_ignore_bogus = 0;
 372         cfg->ipsecmod_hook = NULL;
 373         cfg->ipsecmod_max_ttl = 3600;
 374         cfg->ipsecmod_whitelist = NULL;
 375         cfg->ipsecmod_strict = 0;
 376 #endif
 377         cfg->do_answer_cookie = 0;
 378         memset(cfg->cookie_secret, 0, sizeof(cfg->cookie_secret));
 379         cfg->cookie_secret_len = 16;
 380         init_cookie_secret(cfg->cookie_secret, cfg->cookie_secret_len);
 381 #ifdef USE_CACHEDB
 382         if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit;
 383         if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit;
 384 #ifdef USE_REDIS
 385         if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit;
 386         cfg->redis_server_path = NULL;
 387         cfg->redis_server_password = NULL;
 388         cfg->redis_timeout = 100;
 389         cfg->redis_server_port = 6379;
 390         cfg->redis_expire_records = 0;
 391 #endif  /* USE_REDIS */
 392 #endif  /* USE_CACHEDB */
 393 #ifdef USE_IPSET
 394         cfg->ipset_name_v4 = NULL;
 395         cfg->ipset_name_v6 = NULL;
 396 #endif
 397         cfg->ede = 0;
 398         return cfg;
 399 error_exit:
 400         config_delete(cfg);
 401         return NULL;
 402 }
 403
 404 struct config_file* config_create_forlib(void)
 405 {
 406         struct config_file* cfg = config_create();
 407         if(!cfg) return NULL;
 408         /* modifications for library use, less verbose, less memory */
 409         free(cfg->chrootdir);
 410         cfg->chrootdir = NULL;
 411         cfg->verbosity = 0;
 412         cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable'
 413                 and probably within the ulimit(maxfds) of the user */
 414         cfg->outgoing_num_tcp = 2;
 415         cfg->msg_cache_size = 1024*1024;
 416         cfg->msg_cache_slabs = 1;
 417         cfg->rrset_cache_size = 1024*1024;
 418         cfg->rrset_cache_slabs = 1;
 419         cfg->infra_cache_slabs = 1;
 420         cfg->use_syslog = 0;
 421         cfg->key_cache_size = 1024*1024;
 422         cfg->key_cache_slabs = 1;
 423         cfg->neg_cache_size = 100 * 1024;
 424         cfg->donotquery_localhost = 0; /* allow, so that you can ask a
 425                 forward nameserver running on localhost */
 426         cfg->val_log_level = 2; /* to fill why_bogus with */
 427         cfg->val_log_squelch = 1;
 428         cfg->minimal_responses = 0;
 429         cfg->harden_short_bufsize = 1;
 430         return cfg;
 431 }
 432
 433 /** check that the value passed is >= 0 */
 434 #define IS_NUMBER_OR_ZERO \
 435         if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0
 436 /** check that the value passed is > 0 */
 437 #define IS_NONZERO_NUMBER \
 438         if(atoi(val) == 0) return 0
 439 /** check that the value passed is not 0 and a power of 2 */
 440 #define IS_POW2_NUMBER \
 441         if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0
 442 /** check that the value passed is yes or no */
 443 #define IS_YES_OR_NO \
 444         if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0
 445 /** put integer_or_zero into variable */
 446 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 447         { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); }
 448 /** put integer_nonzero into variable */
 449 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 450         { IS_NONZERO_NUMBER; cfg->var = atoi(val); }
 451 /** put integer_or_zero into unsigned */
 452 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 453         { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); }
 454 /** put integer_or_zero into size_t */
 455 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 456         { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); }
 457 /** put integer_nonzero into size_t */
 458 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 459         { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); }
 460 /** put yesno into variable */
 461 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \
 462         { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); }
 463 /** put memsize into variable */
 464 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \
 465         { return cfg_parse_memsize(val, &cfg->var); }
 466 /** put pow2 number into variable */
 467 #define S_POW2(str, var) if(strcmp(opt, str)==0) \
 468         { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); }
 469 /** put string into variable */
 470 #define S_STR(str, var) if(strcmp(opt, str)==0) \
 471         { free(cfg->var); return (cfg->var = strdup(val)) != NULL; }
 472 /** put string into strlist */
 473 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \
 474         { return cfg_strlist_insert(&cfg->var, strdup(val)); }
 475 /** put string into strlist if not present yet*/
 476 #define S_STRLIST_UNIQ(str, var) if(strcmp(opt, str)==0) \
 477         { if(cfg_strlist_find(cfg->var, val)) { return 0;} \
 478           return cfg_strlist_insert(&cfg->var, strdup(val)); }
 479 /** append string to strlist */
 480 #define S_STRLIST_APPEND(str, var) if(strcmp(opt, str)==0) \
 481         { return cfg_strlist_append(&cfg->var, strdup(val)); }
 482
 483 int config_set_option(struct config_file* cfg, const char* opt,
 484         const char* val)
 485 {
 486         char buf[64];
 487         if(!opt) return 0;
 488         if(opt[strlen(opt)-1] != ':' && strlen(opt)+2<sizeof(buf)) {
 489                 snprintf(buf, sizeof(buf), "%s:", opt);
 490                 opt = buf;
 491         }
 492         S_NUMBER_OR_ZERO("verbosity:", verbosity)
 493         else if(strcmp(opt, "statistics-interval:") == 0) {
 494                 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
 495                         cfg->stat_interval = 0;
 496                 else if(atoi(val) == 0)
 497                         return 0;
 498                 else cfg->stat_interval = atoi(val);
 499         } else if(strcmp(opt, "num-threads:") == 0) {
 500                 /* not supported, library must have 1 thread in bgworker */
 501                 return 0;
 502         } else if(strcmp(opt, "outgoing-port-permit:") == 0) {
 503                 return cfg_mark_ports(val, 1,
 504                         cfg->outgoing_avail_ports, 65536);
 505         } else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
 506                 return cfg_mark_ports(val, 0,
 507                         cfg->outgoing_avail_ports, 65536);
 508         } else if(strcmp(opt, "local-zone:") == 0) {
 509                 return cfg_parse_local_zone(cfg, val);
 510         } else if(strcmp(opt, "val-override-date:") == 0) {
 511                 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) {
 512                         cfg->val_date_override = 0;
 513                 } else if(strlen(val) == 14) {
 514                         cfg->val_date_override = cfg_convert_timeval(val);
 515                         return cfg->val_date_override != 0;
 516                 } else {
 517                         if(atoi(val) == 0) return 0;
 518                         cfg->val_date_override = (uint32_t)atoi(val);
 519                 }
 520         } else if(strcmp(opt, "local-data-ptr:") == 0) {
 521                 char* ptr = cfg_ptr_reverse((char*)opt);
 522                 return cfg_strlist_insert(&cfg->local_data, ptr);
 523         } else if(strcmp(opt, "logfile:") == 0) {
 524                 cfg->use_syslog = 0;
 525                 free(cfg->logfile);
 526                 return (cfg->logfile = strdup(val)) != NULL;
 527         }
 528         else if(strcmp(opt, "log-time-ascii:") == 0)
 529         { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0);
 530           log_set_time_asc(cfg->log_time_ascii); }
 531         else S_SIZET_NONZERO("max-udp-size:", max_udp_size)
 532         else S_YNO("use-syslog:", use_syslog)
 533         else S_STR("log-identity:", log_identity)
 534         else S_YNO("extended-statistics:", stat_extended)
 535         else S_YNO("statistics-inhibit-zero:", stat_inhibit_zero)
 536         else S_YNO("statistics-cumulative:", stat_cumulative)
 537         else S_YNO("shm-enable:", shm_enable)
 538         else S_NUMBER_OR_ZERO("shm-key:", shm_key)
 539         else S_YNO("do-ip4:", do_ip4)
 540         else S_YNO("do-ip6:", do_ip6)
 541         else S_YNO("do-udp:", do_udp)
 542         else S_YNO("do-tcp:", do_tcp)
 543         else S_YNO("prefer-ip4:", prefer_ip4)
 544         else S_YNO("prefer-ip6:", prefer_ip6)
 545         else S_YNO("tcp-upstream:", tcp_upstream)
 546         else S_YNO("udp-upstream-without-downstream:",
 547                 udp_upstream_without_downstream)
 548         else S_NUMBER_NONZERO("tcp-mss:", tcp_mss)
 549         else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss)
 550         else S_NUMBER_NONZERO("tcp-auth-query-timeout:", tcp_auth_query_timeout)
 551         else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout)
 552         else S_NUMBER_NONZERO("max-reuse-tcp-queries:", max_reuse_tcp_queries)
 553         else S_NUMBER_NONZERO("tcp-reuse-timeout:", tcp_reuse_timeout)
 554         else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive)
 555         else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout)
 556         else S_NUMBER_OR_ZERO("sock-queue-timeout:", sock_queue_timeout)
 557         else S_YNO("ssl-upstream:", ssl_upstream)
 558         else S_YNO("tls-upstream:", ssl_upstream)
 559         else S_STR("ssl-service-key:", ssl_service_key)
 560         else S_STR("tls-service-key:", ssl_service_key)
 561         else S_STR("ssl-service-pem:", ssl_service_pem)
 562         else S_STR("tls-service-pem:", ssl_service_pem)
 563         else S_NUMBER_NONZERO("ssl-port:", ssl_port)
 564         else S_NUMBER_NONZERO("tls-port:", ssl_port)
 565         else S_STR("ssl-cert-bundle:", tls_cert_bundle)
 566         else S_STR("tls-cert-bundle:", tls_cert_bundle)
 567         else S_YNO("tls-win-cert:", tls_win_cert)
 568         else S_YNO("tls-system-cert:", tls_win_cert)
 569         else S_STRLIST("additional-ssl-port:", tls_additional_port)
 570         else S_STRLIST("additional-tls-port:", tls_additional_port)
 571         else S_STRLIST("tls-additional-ports:", tls_additional_port)
 572         else S_STRLIST("tls-additional-port:", tls_additional_port)
 573         else S_STRLIST_APPEND("tls-session-ticket-keys:", tls_session_ticket_keys)
 574         else S_STR("tls-ciphers:", tls_ciphers)
 575         else S_STR("tls-ciphersuites:", tls_ciphersuites)
 576         else S_YNO("tls-use-sni:", tls_use_sni)
 577         else S_NUMBER_NONZERO("https-port:", https_port)
 578         else S_STR("http-endpoint:", http_endpoint)
 579         else S_NUMBER_NONZERO("http-max-streams:", http_max_streams)
 580         else S_MEMSIZE("http-query-buffer-size:", http_query_buffer_size)
 581         else S_MEMSIZE("http-response-buffer-size:", http_response_buffer_size)
 582         else S_YNO("http-nodelay:", http_nodelay)
 583         else S_YNO("http-notls-downstream:", http_notls_downstream)
 584         else S_YNO("interface-automatic:", if_automatic)
 585         else S_STR("interface-automatic-ports:", if_automatic_ports)
 586         else S_YNO("use-systemd:", use_systemd)
 587         else S_YNO("do-daemonize:", do_daemonize)
 588         else S_NUMBER_NONZERO("port:", port)
 589         else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports)
 590         else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp)
 591         else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp)
 592         else S_MEMSIZE("stream-wait-size:", stream_wait_size)
 593         else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size)
 594         else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size)
 595         else S_MEMSIZE("msg-cache-size:", msg_cache_size)
 596         else S_POW2("msg-cache-slabs:", msg_cache_slabs)
 597         else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread)
 598         else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time)
 599         else S_MEMSIZE("so-rcvbuf:", so_rcvbuf)
 600         else S_MEMSIZE("so-sndbuf:", so_sndbuf)
 601         else S_YNO("so-reuseport:", so_reuseport)
 602         else S_YNO("ip-transparent:", ip_transparent)
 603         else S_YNO("ip-freebind:", ip_freebind)
 604         else S_NUMBER_OR_ZERO("ip-dscp:", ip_dscp)
 605         else S_MEMSIZE("rrset-cache-size:", rrset_cache_size)
 606         else S_POW2("rrset-cache-slabs:", rrset_cache_slabs)
 607         else S_YNO("prefetch:", prefetch)
 608         else S_YNO("prefetch-key:", prefetch_key)
 609         else S_YNO("deny-any:", deny_any)
 610         else if(strcmp(opt, "cache-max-ttl:") == 0)
 611         { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
 612         else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
 613         { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
 614         else if(strcmp(opt, "cache-min-ttl:") == 0)
 615         { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
 616         else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
 617                 IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val);
 618                 RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt;
 619         }
 620         else if(strcmp(opt, "infra-cache-max-rtt:") == 0) {
 621                 IS_NUMBER_OR_ZERO; cfg->infra_cache_max_rtt = atoi(val);
 622                 RTT_MAX_TIMEOUT=cfg->infra_cache_max_rtt;
 623                 USEFUL_SERVER_TOP_TIMEOUT = RTT_MAX_TIMEOUT;
 624                 BLACKLIST_PENALTY = USEFUL_SERVER_TOP_TIMEOUT*4;
 625         }
 626         else S_YNO("infra-keep-probing:", infra_keep_probing)
 627         else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl)
 628         else S_POW2("infra-cache-slabs:", infra_cache_slabs)
 629         else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts)
 630         else S_NUMBER_OR_ZERO("delay-close:", delay_close)
 631         else S_YNO("udp-connect:", udp_connect)
 632         else S_STR("chroot:", chrootdir)
 633         else S_STR("username:", username)
 634         else S_STR("directory:", directory)
 635         else S_STR("pidfile:", pidfile)
 636         else S_YNO("hide-identity:", hide_identity)
 637         else S_YNO("hide-version:", hide_version)
 638         else S_YNO("hide-trustanchor:", hide_trustanchor)
 639         else S_YNO("hide-http-user-agent:", hide_http_user_agent)
 640         else S_STR("identity:", identity)
 641         else S_STR("version:", version)
 642         else S_STR("http-user-agent:", http_user_agent)
 643         else if(strcmp(opt, "nsid:") == 0) {
 644                 free(cfg->nsid_cfg_str);
 645                 if (!(cfg->nsid_cfg_str = strdup(val)))
 646                         return 0;
 647                 /* Empty string is just validly unsetting nsid */
 648                 if (*val == 0) {
 649                         free(cfg->nsid);
 650                         cfg->nsid = NULL;
 651                         cfg->nsid_len = 0;
 652                         return 1;
 653                 }
 654                 cfg->nsid = cfg_parse_nsid(val, &cfg->nsid_len);
 655                 return cfg->nsid != NULL;
 656         }
 657         else S_STRLIST("root-hints:", root_hints)
 658         else S_STR("target-fetch-policy:", target_fetch_policy)
 659         else S_YNO("harden-glue:", harden_glue)
 660         else S_YNO("harden-short-bufsize:", harden_short_bufsize)
 661         else S_YNO("harden-large-queries:", harden_large_queries)
 662         else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
 663         else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
 664         else S_YNO("harden-referral-path:", harden_referral_path)
 665         else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
 666         else S_YNO("harden-unknown-additional:", harden_unknown_additional)
 667         else S_YNO("use-caps-for-id:", use_caps_bits_for_id)
 668         else S_STRLIST("caps-whitelist:", caps_whitelist)
 669         else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
 670         else S_STRLIST("private-address:", private_address)
 671         else S_STRLIST("private-domain:", private_domain)
 672         else S_YNO("do-not-query-localhost:", donotquery_localhost)
 673         else S_STRLIST("do-not-query-address:", donotqueryaddrs)
 674         else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list)
 675         else S_STRLIST("trust-anchor-file:", trust_anchor_file_list)
 676         else S_STRLIST("trust-anchor:", trust_anchor_list)
 677         else S_STRLIST("trusted-keys-file:", trusted_keys_file_list)
 678         else S_YNO("trust-anchor-signaling:", trust_anchor_signaling)
 679         else S_YNO("root-key-sentinel:", root_key_sentinel)
 680         else S_STRLIST("domain-insecure:", domain_insecure)
 681         else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl)
 682         else S_YNO("val-clean-additional:", val_clean_additional)
 683         else S_NUMBER_OR_ZERO("val-log-level:", val_log_level)
 684         else S_YNO("val-log-squelch:", val_log_squelch)
 685         else S_YNO("log-queries:", log_queries)
 686         else S_YNO("log-replies:", log_replies)
 687         else S_YNO("log-tag-queryreply:", log_tag_queryreply)
 688         else S_YNO("log-local-actions:", log_local_actions)
 689         else S_YNO("log-servfail:", log_servfail)
 690         else S_YNO("val-permissive-mode:", val_permissive_mode)
 691         else S_YNO("aggressive-nsec:", aggressive_nsec)
 692         else S_YNO("ignore-cd-flag:", ignore_cd)
 693         else if(strcmp(opt, "serve-expired:") == 0)
 694         { IS_YES_OR_NO; cfg->serve_expired = (strcmp(val, "yes") == 0);
 695           SERVE_EXPIRED = cfg->serve_expired; }
 696         else if(strcmp(opt, "serve-expired-ttl:") == 0)
 697         { IS_NUMBER_OR_ZERO; cfg->serve_expired_ttl = atoi(val); SERVE_EXPIRED_TTL=(time_t)cfg->serve_expired_ttl;}
 698         else S_YNO("serve-expired-ttl-reset:", serve_expired_ttl_reset)
 699         else if(strcmp(opt, "serve-expired-reply-ttl:") == 0)
 700         { IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;}
 701         else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout)
 702         else S_YNO("ede:", ede)
 703         else S_YNO("ede-serve-expired:", ede_serve_expired)
 704         else S_YNO("serve-original-ttl:", serve_original_ttl)
 705         else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
 706         else S_YNO("zonemd-permissive-mode:", zonemd_permissive_mode)
 707         else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown)
 708         else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown)
 709         else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing)
 710         else if(strcmp(opt, "permit-small-holddown:") == 0)
 711         { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0);
 712           autr_permit_small_holddown = cfg->permit_small_holddown; }
 713         else S_MEMSIZE("key-cache-size:", key_cache_size)
 714         else S_POW2("key-cache-slabs:", key_cache_slabs)
 715         else S_MEMSIZE("neg-cache-size:", neg_cache_size)
 716         else S_YNO("minimal-responses:", minimal_responses)
 717         else S_YNO("rrset-roundrobin:", rrset_roundrobin)
 718         else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit)
 719         else S_STRLIST("local-data:", local_data)
 720         else S_YNO("unblock-lan-zones:", unblock_lan_zones)
 721         else S_YNO("insecure-lan-zones:", insecure_lan_zones)
 722         else S_YNO("control-enable:", remote_control_enable)
 723         else S_STRLIST_APPEND("control-interface:", control_ifs)
 724         else S_NUMBER_NONZERO("control-port:", control_port)
 725         else S_STR("server-key-file:", server_key_file)
 726         else S_STR("server-cert-file:", server_cert_file)
 727         else S_STR("control-key-file:", control_key_file)
 728         else S_STR("control-cert-file:", control_cert_file)
 729         else S_STR("module-config:", module_conf)
 730         else S_STRLIST("python-script:", python_script)
 731         else S_STRLIST("dynlib-file:", dynlib_file)
 732         else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check)
 733 #ifdef CLIENT_SUBNET
 734         /* Can't set max subnet prefix here, since that value is used when
 735          * generating the address tree. */
 736         /* No client-subnet-always-forward here, module registration depends on
 737          * this option. */
 738 #endif
 739 #ifdef USE_DNSTAP
 740         else S_YNO("dnstap-enable:", dnstap)
 741         else S_YNO("dnstap-bidirectional:", dnstap_bidirectional)
 742         else S_STR("dnstap-socket-path:", dnstap_socket_path)
 743         else S_STR("dnstap-ip:", dnstap_ip)
 744         else S_YNO("dnstap-tls:", dnstap_tls)
 745         else S_STR("dnstap-tls-server-name:", dnstap_tls_server_name)
 746         else S_STR("dnstap-tls-cert-bundle:", dnstap_tls_cert_bundle)
 747         else S_STR("dnstap-tls-client-key-file:", dnstap_tls_client_key_file)
 748         else S_STR("dnstap-tls-client-cert-file:",
 749                 dnstap_tls_client_cert_file)
 750         else S_YNO("dnstap-send-identity:", dnstap_send_identity)
 751         else S_YNO("dnstap-send-version:", dnstap_send_version)
 752         else S_STR("dnstap-identity:", dnstap_identity)
 753         else S_STR("dnstap-version:", dnstap_version)
 754         else S_YNO("dnstap-log-resolver-query-messages:",
 755                 dnstap_log_resolver_query_messages)
 756         else S_YNO("dnstap-log-resolver-response-messages:",
 757                 dnstap_log_resolver_response_messages)
 758         else S_YNO("dnstap-log-client-query-messages:",
 759                 dnstap_log_client_query_messages)
 760         else S_YNO("dnstap-log-client-response-messages:",
 761                 dnstap_log_client_response_messages)
 762         else S_YNO("dnstap-log-forwarder-query-messages:",
 763                 dnstap_log_forwarder_query_messages)
 764         else S_YNO("dnstap-log-forwarder-response-messages:",
 765                 dnstap_log_forwarder_response_messages)
 766 #endif
 767 #ifdef USE_DNSCRYPT
 768         else S_YNO("dnscrypt-enable:", dnscrypt)
 769         else S_NUMBER_NONZERO("dnscrypt-port:", dnscrypt_port)
 770         else S_STR("dnscrypt-provider:", dnscrypt_provider)
 771         else S_STRLIST_UNIQ("dnscrypt-provider-cert:", dnscrypt_provider_cert)
 772         else S_STRLIST("dnscrypt-provider-cert-rotated:", dnscrypt_provider_cert_rotated)
 773         else S_STRLIST_UNIQ("dnscrypt-secret-key:", dnscrypt_secret_key)
 774         else S_MEMSIZE("dnscrypt-shared-secret-cache-size:",
 775                 dnscrypt_shared_secret_cache_size)
 776         else S_POW2("dnscrypt-shared-secret-cache-slabs:",
 777                 dnscrypt_shared_secret_cache_slabs)
 778         else S_MEMSIZE("dnscrypt-nonce-cache-size:",
 779                 dnscrypt_nonce_cache_size)
 780         else S_POW2("dnscrypt-nonce-cache-slabs:",
 781                 dnscrypt_nonce_cache_slabs)
 782 #endif
 783         else if(strcmp(opt, "ip-ratelimit-cookie:") == 0) {
 784             IS_NUMBER_OR_ZERO; cfg->ip_ratelimit_cookie = atoi(val);
 785             infra_ip_ratelimit_cookie=cfg->ip_ratelimit_cookie;
 786         }
 787         else if(strcmp(opt, "ip-ratelimit:") == 0) {
 788             IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val);
 789             infra_ip_ratelimit=cfg->ip_ratelimit;
 790         }
 791         else if(strcmp(opt, "ratelimit:") == 0) {
 792             IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val);
 793             infra_dp_ratelimit=cfg->ratelimit;
 794         }
 795         else S_MEMSIZE("ip-ratelimit-size:", ip_ratelimit_size)
 796         else S_MEMSIZE("ratelimit-size:", ratelimit_size)
 797         else S_POW2("ip-ratelimit-slabs:", ip_ratelimit_slabs)
 798         else S_POW2("ratelimit-slabs:", ratelimit_slabs)
 799         else S_NUMBER_OR_ZERO("ip-ratelimit-factor:", ip_ratelimit_factor)
 800         else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor)
 801         else S_YNO("ip-ratelimit-backoff:", ip_ratelimit_backoff)
 802         else S_YNO("ratelimit-backoff:", ratelimit_backoff)
 803         else S_NUMBER_NONZERO("outbound-msg-retry:", outbound_msg_retry)
 804         else S_NUMBER_NONZERO("max-sent-count:", max_sent_count)
 805         else S_NUMBER_NONZERO("max-query-restarts:", max_query_restarts)
 806         else S_SIZET_NONZERO("fast-server-num:", fast_server_num)
 807         else S_NUMBER_OR_ZERO("fast-server-permil:", fast_server_permil)
 808         else S_YNO("qname-minimisation:", qname_minimisation)
 809         else S_YNO("qname-minimisation-strict:", qname_minimisation_strict)
 810         else S_YNO("pad-responses:", pad_responses)
 811         else S_SIZET_NONZERO("pad-responses-block-size:", pad_responses_block_size)
 812         else S_YNO("pad-queries:", pad_queries)
 813         else S_SIZET_NONZERO("pad-queries-block-size:", pad_queries_block_size)
 814         else S_STRLIST("proxy-protocol-port:", proxy_protocol_port)
 815 #ifdef USE_IPSECMOD
 816         else S_YNO("ipsecmod-enabled:", ipsecmod_enabled)
 817         else S_YNO("ipsecmod-ignore-bogus:", ipsecmod_ignore_bogus)
 818         else if(strcmp(opt, "ipsecmod-max-ttl:") == 0)
 819         { IS_NUMBER_OR_ZERO; cfg->ipsecmod_max_ttl = atoi(val); }
 820         else S_YNO("ipsecmod-strict:", ipsecmod_strict)
 821 #endif
 822         else if(strcmp(opt, "define-tag:") ==0) {
 823                 return config_add_tag(cfg, val);
 824         /* val_sig_skew_min, max and val_max_restart are copied into val_env
 825          * during init so this does not update val_env with set_option */
 826         } else if(strcmp(opt, "val-sig-skew-min:") == 0)
 827         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); }
 828         else if(strcmp(opt, "val-sig-skew-max:") == 0)
 829         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); }
 830         else if(strcmp(opt, "val-max-restart:") == 0)
 831         { IS_NUMBER_OR_ZERO; cfg->val_max_restart = (int32_t)atoi(val); }
 832         else if (strcmp(opt, "outgoing-interface:") == 0) {
 833                 char* d = strdup(val);
 834                 char** oi =
 835                 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
 836                 if(!d || !oi) { free(d); free(oi); return -1; }
 837                 if(cfg->out_ifs && cfg->num_out_ifs) {
 838                         memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*));
 839                         free(cfg->out_ifs);
 840                 }
 841                 oi[cfg->num_out_ifs++] = d;
 842                 cfg->out_ifs = oi;
 843         } else {
 844                 /* unknown or unsupported (from the set_option interface):
 845                  * interface, outgoing-interface, access-control,
 846                  * stub-zone, name, stub-addr, stub-host, stub-prime
 847                  * forward-first, stub-first, forward-ssl-upstream,
 848                  * stub-ssl-upstream, forward-zone, auth-zone
 849                  * name, forward-addr, forward-host,
 850                  * ratelimit-for-domain, ratelimit-below-domain,
 851                  * local-zone-tag, access-control-view, interface-*,
 852                  * send-client-subnet, client-subnet-always-forward,
 853                  * max-client-subnet-ipv4, max-client-subnet-ipv6,
 854                  * min-client-subnet-ipv4, min-client-subnet-ipv6,
 855                  * max-ecs-tree-size-ipv4, max-ecs-tree-size-ipv6, ipsecmod_hook,
 856                  * ipsecmod_whitelist. */
 857                 return 0;
 858         }
 859         return 1;
 860 }
 861
 862 void config_print_func(char* line, void* arg)
 863 {
 864         FILE* f = (FILE*)arg;
 865         (void)fprintf(f, "%s\n", line);
 866 }
 867
 868 /** collate func arg */
 869 struct config_collate_arg {
 870         /** list of result items */
 871         struct config_strlist_head list;
 872         /** if a malloc error occurred, 0 is OK */
 873         int status;
 874 };
 875
 876 void config_collate_func(char* line, void* arg)
 877 {
 878         struct config_collate_arg* m = (struct config_collate_arg*)arg;
 879         if(m->status)
 880                 return;
 881         if(!cfg_strlist_append(&m->list, strdup(line)))
 882                 m->status = 1;
 883 }
 884
 885 int config_get_option_list(struct config_file* cfg, const char* opt,
 886         struct config_strlist** list)
 887 {
 888         struct config_collate_arg m;
 889         memset(&m, 0, sizeof(m));
 890         *list = NULL;
 891         if(!config_get_option(cfg, opt, config_collate_func, &m))
 892                 return 1;
 893         if(m.status) {
 894                 config_delstrlist(m.list.first);
 895                 return 2;
 896         }
 897         *list = m.list.first;
 898         return 0;
 899 }
 900
 901 int
 902 config_get_option_collate(struct config_file* cfg, const char* opt, char** str)
 903 {
 904         struct config_strlist* list = NULL;
 905         int r;
 906         *str = NULL;
 907         if((r = config_get_option_list(cfg, opt, &list)) != 0)
 908                 return r;
 909         *str = config_collate_cat(list);
 910         config_delstrlist(list);
 911         if(!*str) return 2;
 912         return 0;
 913 }
 914
 915 char*
 916 config_collate_cat(struct config_strlist* list)
 917 {
 918         size_t total = 0, left;
 919         struct config_strlist* s;
 920         char *r, *w;
 921         if(!list) /* no elements */
 922                 return strdup("");
 923         if(list->next == NULL) /* one element , no newline at end. */
 924                 return strdup(list->str);
 925         /* count total length */
 926         for(s=list; s; s=s->next)
 927                 total += strlen(s->str) + 1; /* len + newline */
 928         left = total+1; /* one extra for nul at end */
 929         r = malloc(left);
 930         if(!r)
 931                 return NULL;
 932         w = r;
 933         for(s=list; s; s=s->next) {
 934                 size_t this = strlen(s->str);
 935                 if(this+2 > left) { /* sanity check */
 936                         free(r);
 937                         return NULL;
 938                 }
 939                 snprintf(w, left, "%s\n", s->str);
 940                 this = strlen(w);
 941                 w += this;
 942                 left -= this;
 943         }
 944         return r;
 945 }
 946
 947 /** compare and print decimal option */
 948 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \
 949         {snprintf(buf, len, "%d", (int)cfg->var); \
 950         func(buf, arg);}
 951 /** compare and print unsigned option */
 952 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \
 953         {snprintf(buf, len, "%u", (unsigned)cfg->var); \
 954         func(buf, arg);}
 955 /** compare and print yesno option */
 956 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \
 957         {func(cfg->var?"yes":"no", arg);}
 958 /** compare and print string option */
 959 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \
 960         {func(cfg->var?cfg->var:"", arg);}
 961 /** compare and print array option */
 962 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \
 963         {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);}
 964 /** compare and print memorysize option */
 965 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \
 966         if(cfg->var > 1024*1024*1024) { \
 967           size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \
 968           snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \
 969         } else snprintf(buf, len, "%u", (unsigned)cfg->var); \
 970         func(buf, arg);}
 971 /** compare and print list option */
 972 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \
 973         struct config_strlist* p = cfg->lst; \
 974         for(p = cfg->lst; p; p = p->next) \
 975                 func(p->str, arg); \
 976         }
 977 /** compare and print list option */
 978 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \
 979         struct config_str2list* p = cfg->lst; \
 980         for(p = cfg->lst; p; p = p->next) { \
 981                 snprintf(buf, len, "%s %s", p->str, p->str2); \
 982                 func(buf, arg); \
 983         } \
 984         }
 985 /** compare and print list option */
 986 #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \
 987         struct config_str3list* p = cfg->lst; \
 988         for(p = cfg->lst; p; p = p->next) { \
 989                 snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \
 990                 func(buf, arg); \
 991         } \
 992         }
 993 /** compare and print taglist option */
 994 #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \
 995         char* tmpstr = NULL; \
 996         struct config_strbytelist *p = cfg->lst; \
 997         for(p = cfg->lst; p; p = p->next) {\
 998                 tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \
 999                 if(tmpstr) {\
1000                         snprintf(buf, len, "%s %s", p->str, tmpstr); \
1001                         func(buf, arg); \
1002                         free(tmpstr); \
1003                 } \
1004         } \
1005         }
1006
1007 int
1008 config_get_option(struct config_file* cfg, const char* opt,
1009         void (*func)(char*,void*), void* arg)
1010 {
1011         char buf[1024], nopt[64];
1012         size_t len = sizeof(buf);
1013         if(!opt) return 0;
1014         if(opt && opt[strlen(opt)-1] == ':' && strlen(opt)<sizeof(nopt)) {
1015                 memmove(nopt, opt, strlen(opt));
1016                 nopt[strlen(opt)-1] = 0;
1017                 opt = nopt;
1018         }
1019         fptr_ok(fptr_whitelist_print_func(func));
1020         O_DEC(opt, "verbosity", verbosity)
1021         else O_DEC(opt, "statistics-interval", stat_interval)
1022         else O_YNO(opt, "statistics-cumulative", stat_cumulative)
1023         else O_YNO(opt, "extended-statistics", stat_extended)
1024         else O_YNO(opt, "statistics-inhibit-zero", stat_inhibit_zero)
1025         else O_YNO(opt, "shm-enable", shm_enable)
1026         else O_DEC(opt, "shm-key", shm_key)
1027         else O_YNO(opt, "use-syslog", use_syslog)
1028         else O_STR(opt, "log-identity", log_identity)
1029         else O_YNO(opt, "log-time-ascii", log_time_ascii)
1030         else O_DEC(opt, "num-threads", num_threads)
1031         else O_IFC(opt, "interface", num_ifs, ifs)
1032         else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
1033         else O_YNO(opt, "interface-automatic", if_automatic)
1034         else O_STR(opt, "interface-automatic-ports", if_automatic_ports)
1035         else O_DEC(opt, "port", port)
1036         else O_DEC(opt, "outgoing-range", outgoing_num_ports)
1037         else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
1038         else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
1039         else O_MEM(opt, "stream-wait-size", stream_wait_size)
1040         else O_DEC(opt, "edns-buffer-size", edns_buffer_size)
1041         else O_DEC(opt, "msg-buffer-size", msg_buffer_size)
1042         else O_MEM(opt, "msg-cache-size", msg_cache_size)
1043         else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs)
1044         else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread)
1045         else O_UNS(opt, "jostle-timeout", jostle_time)
1046         else O_MEM(opt, "so-rcvbuf", so_rcvbuf)
1047         else O_MEM(opt, "so-sndbuf", so_sndbuf)
1048         else O_YNO(opt, "so-reuseport", so_reuseport)
1049         else O_YNO(opt, "ip-transparent", ip_transparent)
1050         else O_YNO(opt, "ip-freebind", ip_freebind)
1051         else O_DEC(opt, "ip-dscp", ip_dscp)
1052         else O_MEM(opt, "rrset-cache-size", rrset_cache_size)
1053         else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs)
1054         else O_YNO(opt, "prefetch-key", prefetch_key)
1055         else O_YNO(opt, "prefetch", prefetch)
1056         else O_YNO(opt, "deny-any", deny_any)
1057         else O_DEC(opt, "cache-max-ttl", max_ttl)
1058         else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
1059         else O_DEC(opt, "cache-min-ttl", min_ttl)
1060         else O_DEC(opt, "infra-host-ttl", host_ttl)
1061         else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
1062         else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt)
1063         else O_UNS(opt, "infra-cache-max-rtt", infra_cache_max_rtt)
1064         else O_YNO(opt, "infra-keep-probing", infra_keep_probing)
1065         else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts)
1066         else O_UNS(opt, "delay-close", delay_close)
1067         else O_YNO(opt, "udp-connect", udp_connect)
1068         else O_YNO(opt, "do-ip4", do_ip4)
1069         else O_YNO(opt, "do-ip6", do_ip6)
1070         else O_YNO(opt, "do-udp", do_udp)
1071         else O_YNO(opt, "do-tcp", do_tcp)
1072         else O_YNO(opt, "prefer-ip4", prefer_ip4)
1073         else O_YNO(opt, "prefer-ip6", prefer_ip6)
1074         else O_YNO(opt, "tcp-upstream", tcp_upstream)
1075         else O_YNO(opt, "udp-upstream-without-downstream", udp_upstream_without_downstream)
1076         else O_DEC(opt, "tcp-mss", tcp_mss)
1077         else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss)
1078         else O_DEC(opt, "tcp-auth-query-timeout", tcp_auth_query_timeout)
1079         else O_DEC(opt, "tcp-idle-timeout", tcp_idle_timeout)
1080         else O_DEC(opt, "max-reuse-tcp-queries", max_reuse_tcp_queries)
1081         else O_DEC(opt, "tcp-reuse-timeout", tcp_reuse_timeout)
1082         else O_YNO(opt, "edns-tcp-keepalive", do_tcp_keepalive)
1083         else O_DEC(opt, "edns-tcp-keepalive-timeout", tcp_keepalive_timeout)
1084         else O_DEC(opt, "sock-queue-timeout", sock_queue_timeout)
1085         else O_YNO(opt, "ssl-upstream", ssl_upstream)
1086         else O_YNO(opt, "tls-upstream", ssl_upstream)
1087         else O_STR(opt, "ssl-service-key", ssl_service_key)
1088         else O_STR(opt, "tls-service-key", ssl_service_key)
1089         else O_STR(opt, "ssl-service-pem", ssl_service_pem)
1090         else O_STR(opt, "tls-service-pem", ssl_service_pem)
1091         else O_DEC(opt, "ssl-port", ssl_port)
1092         else O_DEC(opt, "tls-port", ssl_port)
1093         else O_STR(opt, "ssl-cert-bundle", tls_cert_bundle)
1094         else O_STR(opt, "tls-cert-bundle", tls_cert_bundle)
1095         else O_YNO(opt, "tls-win-cert", tls_win_cert)
1096         else O_YNO(opt, "tls-system-cert", tls_win_cert)
1097         else O_LST(opt, "additional-ssl-port", tls_additional_port)
1098         else O_LST(opt, "additional-tls-port", tls_additional_port)
1099         else O_LST(opt, "tls-additional-ports", tls_additional_port)
1100         else O_LST(opt, "tls-additional-port", tls_additional_port)
1101         else O_LST(opt, "tls-session-ticket-keys", tls_session_ticket_keys.first)
1102         else O_STR(opt, "tls-ciphers", tls_ciphers)
1103         else O_STR(opt, "tls-ciphersuites", tls_ciphersuites)
1104         else O_YNO(opt, "tls-use-sni", tls_use_sni)
1105         else O_DEC(opt, "https-port", https_port)
1106         else O_STR(opt, "http-endpoint", http_endpoint)
1107         else O_UNS(opt, "http-max-streams", http_max_streams)
1108         else O_MEM(opt, "http-query-buffer-size", http_query_buffer_size)
1109         else O_MEM(opt, "http-response-buffer-size", http_response_buffer_size)
1110         else O_YNO(opt, "http-nodelay", http_nodelay)
1111         else O_YNO(opt, "http-notls-downstream", http_notls_downstream)
1112         else O_YNO(opt, "use-systemd", use_systemd)
1113         else O_YNO(opt, "do-daemonize", do_daemonize)
1114         else O_STR(opt, "chroot", chrootdir)
1115         else O_STR(opt, "username", username)
1116         else O_STR(opt, "directory", directory)
1117         else O_STR(opt, "logfile", logfile)
1118         else O_YNO(opt, "log-queries", log_queries)
1119         else O_YNO(opt, "log-replies", log_replies)
1120         else O_YNO(opt, "log-tag-queryreply", log_tag_queryreply)
1121         else O_YNO(opt, "log-local-actions", log_local_actions)
1122         else O_YNO(opt, "log-servfail", log_servfail)
1123         else O_STR(opt, "pidfile", pidfile)
1124         else O_YNO(opt, "hide-identity", hide_identity)
1125         else O_YNO(opt, "hide-version", hide_version)
1126         else O_YNO(opt, "hide-trustanchor", hide_trustanchor)
1127         else O_YNO(opt, "hide-http-user-agent", hide_http_user_agent)
1128         else O_STR(opt, "identity", identity)
1129         else O_STR(opt, "version", version)
1130         else O_STR(opt, "http-user-agent", http_user_agent)
1131         else O_STR(opt, "nsid", nsid_cfg_str)
1132         else O_STR(opt, "target-fetch-policy", target_fetch_policy)
1133         else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize)
1134         else O_YNO(opt, "harden-large-queries", harden_large_queries)
1135         else O_YNO(opt, "harden-glue", harden_glue)
1136         else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
1137         else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
1138         else O_YNO(opt, "harden-referral-path", harden_referral_path)
1139         else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
1140         else O_YNO(opt, "harden-unknown-additional", harden_unknown_additional)
1141         else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
1142         else O_LST(opt, "caps-whitelist", caps_whitelist)
1143         else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
1144         else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)
1145         else O_STR(opt, "module-config", module_conf)
1146         else O_DEC(opt, "val-bogus-ttl", bogus_ttl)
1147         else O_YNO(opt, "val-clean-additional", val_clean_additional)
1148         else O_DEC(opt, "val-log-level", val_log_level)
1149         else O_YNO(opt, "val-permissive-mode", val_permissive_mode)
1150         else O_YNO(opt, "aggressive-nsec", aggressive_nsec)
1151         else O_YNO(opt, "ignore-cd-flag", ignore_cd)
1152         else O_YNO(opt, "serve-expired", serve_expired)
1153         else O_DEC(opt, "serve-expired-ttl", serve_expired_ttl)
1154         else O_YNO(opt, "serve-expired-ttl-reset", serve_expired_ttl_reset)
1155         else O_DEC(opt, "serve-expired-reply-ttl", serve_expired_reply_ttl)
1156         else O_DEC(opt, "serve-expired-client-timeout", serve_expired_client_timeout)
1157         else O_YNO(opt, "ede", ede)
1158         else O_YNO(opt, "ede-serve-expired", ede_serve_expired)
1159         else O_YNO(opt, "serve-original-ttl", serve_original_ttl)
1160         else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations)
1161         else O_YNO(opt, "zonemd-permissive-mode", zonemd_permissive_mode)
1162         else O_UNS(opt, "add-holddown", add_holddown)
1163         else O_UNS(opt, "del-holddown", del_holddown)
1164         else O_UNS(opt, "keep-missing", keep_missing)
1165         else O_YNO(opt, "permit-small-holddown", permit_small_holddown)
1166         else O_MEM(opt, "key-cache-size", key_cache_size)
1167         else O_DEC(opt, "key-cache-slabs", key_cache_slabs)
1168         else O_MEM(opt, "neg-cache-size", neg_cache_size)
1169         else O_YNO(opt, "control-enable", remote_control_enable)
1170         else O_DEC(opt, "control-port", control_port)
1171         else O_STR(opt, "server-key-file", server_key_file)
1172         else O_STR(opt, "server-cert-file", server_cert_file)
1173         else O_STR(opt, "control-key-file", control_key_file)
1174         else O_STR(opt, "control-cert-file", control_cert_file)
1175         else O_LST(opt, "root-hints", root_hints)
1176         else O_LS2(opt, "access-control", acls)
1177         else O_LS2(opt, "tcp-connection-limit", tcp_connection_limits)
1178         else O_LST(opt, "do-not-query-address", donotqueryaddrs)
1179         else O_LST(opt, "private-address", private_address)
1180         else O_LST(opt, "private-domain", private_domain)
1181         else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list)
1182         else O_LST(opt, "trust-anchor-file", trust_anchor_file_list)
1183         else O_LST(opt, "trust-anchor", trust_anchor_list)
1184         else O_LST(opt, "trusted-keys-file", trusted_keys_file_list)
1185         else O_YNO(opt, "trust-anchor-signaling", trust_anchor_signaling)
1186         else O_YNO(opt, "root-key-sentinel", root_key_sentinel)
1187         else O_LST(opt, "control-interface", control_ifs.first)
1188         else O_LST(opt, "domain-insecure", domain_insecure)
1189         else O_UNS(opt, "val-override-date", val_date_override)
1190         else O_YNO(opt, "minimal-responses", minimal_responses)
1191         else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
1192         else O_DEC(opt, "unknown-server-time-limit", unknown_server_time_limit)
1193 #ifdef CLIENT_SUBNET
1194         else O_LST(opt, "send-client-subnet", client_subnet)
1195         else O_LST(opt, "client-subnet-zone", client_subnet_zone)
1196         else O_DEC(opt, "max-client-subnet-ipv4", max_client_subnet_ipv4)
1197         else O_DEC(opt, "max-client-subnet-ipv6", max_client_subnet_ipv6)
1198         else O_DEC(opt, "min-client-subnet-ipv4", min_client_subnet_ipv4)
1199         else O_DEC(opt, "min-client-subnet-ipv6", min_client_subnet_ipv6)
1200         else O_DEC(opt, "max-ecs-tree-size-ipv4", max_ecs_tree_size_ipv4)
1201         else O_DEC(opt, "max-ecs-tree-size-ipv6", max_ecs_tree_size_ipv6)
1202         else O_YNO(opt, "client-subnet-always-forward:",
1203                 client_subnet_always_forward)
1204 #endif
1205 #ifdef USE_DNSTAP
1206         else O_YNO(opt, "dnstap-enable", dnstap)
1207         else O_YNO(opt, "dnstap-bidirectional", dnstap_bidirectional)
1208         else O_STR(opt, "dnstap-socket-path", dnstap_socket_path)
1209         else O_STR(opt, "dnstap-ip", dnstap_ip)
1210         else O_YNO(opt, "dnstap-tls", dnstap_tls)
1211         else O_STR(opt, "dnstap-tls-server-name", dnstap_tls_server_name)
1212         else O_STR(opt, "dnstap-tls-cert-bundle", dnstap_tls_cert_bundle)
1213         else O_STR(opt, "dnstap-tls-client-key-file",
1214                 dnstap_tls_client_key_file)
1215         else O_STR(opt, "dnstap-tls-client-cert-file",
1216                 dnstap_tls_client_cert_file)
1217         else O_YNO(opt, "dnstap-send-identity", dnstap_send_identity)
1218         else O_YNO(opt, "dnstap-send-version", dnstap_send_version)
1219         else O_STR(opt, "dnstap-identity", dnstap_identity)
1220         else O_STR(opt, "dnstap-version", dnstap_version)
1221         else O_YNO(opt, "dnstap-log-resolver-query-messages",
1222                 dnstap_log_resolver_query_messages)
1223         else O_YNO(opt, "dnstap-log-resolver-response-messages",
1224                 dnstap_log_resolver_response_messages)
1225         else O_YNO(opt, "dnstap-log-client-query-messages",
1226                 dnstap_log_client_query_messages)
1227         else O_YNO(opt, "dnstap-log-client-response-messages",
1228                 dnstap_log_client_response_messages)
1229         else O_YNO(opt, "dnstap-log-forwarder-query-messages",
1230                 dnstap_log_forwarder_query_messages)
1231         else O_YNO(opt, "dnstap-log-forwarder-response-messages",
1232                 dnstap_log_forwarder_response_messages)
1233 #endif
1234 #ifdef USE_DNSCRYPT
1235         else O_YNO(opt, "dnscrypt-enable", dnscrypt)
1236         else O_DEC(opt, "dnscrypt-port", dnscrypt_port)
1237         else O_STR(opt, "dnscrypt-provider", dnscrypt_provider)
1238         else O_LST(opt, "dnscrypt-provider-cert", dnscrypt_provider_cert)
1239         else O_LST(opt, "dnscrypt-provider-cert-rotated", dnscrypt_provider_cert_rotated)
1240         else O_LST(opt, "dnscrypt-secret-key", dnscrypt_secret_key)
1241         else O_MEM(opt, "dnscrypt-shared-secret-cache-size",
1242                 dnscrypt_shared_secret_cache_size)
1243         else O_DEC(opt, "dnscrypt-shared-secret-cache-slabs",
1244                 dnscrypt_shared_secret_cache_slabs)
1245         else O_MEM(opt, "dnscrypt-nonce-cache-size",
1246                 dnscrypt_nonce_cache_size)
1247         else O_DEC(opt, "dnscrypt-nonce-cache-slabs",
1248                 dnscrypt_nonce_cache_slabs)
1249 #endif
1250         else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones)
1251         else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones)
1252         else O_DEC(opt, "max-udp-size", max_udp_size)
1253         else O_LST(opt, "python-script", python_script)
1254         else O_LST(opt, "dynlib-file", dynlib_file)
1255         else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check)
1256         else O_DEC(opt, "ip-ratelimit-cookie", ip_ratelimit_cookie)
1257         else O_DEC(opt, "ip-ratelimit", ip_ratelimit)
1258         else O_DEC(opt, "ratelimit", ratelimit)
1259         else O_MEM(opt, "ip-ratelimit-size", ip_ratelimit_size)
1260         else O_MEM(opt, "ratelimit-size", ratelimit_size)
1261         else O_DEC(opt, "ip-ratelimit-slabs", ip_ratelimit_slabs)
1262         else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs)
1263         else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain)
1264         else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain)
1265         else O_DEC(opt, "ip-ratelimit-factor", ip_ratelimit_factor)
1266         else O_DEC(opt, "ratelimit-factor", ratelimit_factor)
1267         else O_YNO(opt, "ip-ratelimit-backoff", ip_ratelimit_backoff)
1268         else O_YNO(opt, "ratelimit-backoff", ratelimit_backoff)
1269         else O_UNS(opt, "outbound-msg-retry", outbound_msg_retry)
1270         else O_UNS(opt, "max-sent-count", max_sent_count)
1271         else O_UNS(opt, "max-query-restarts", max_query_restarts)
1272         else O_DEC(opt, "fast-server-num", fast_server_num)
1273         else O_DEC(opt, "fast-server-permil", fast_server_permil)
1274         else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min)
1275         else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max)
1276         else O_DEC(opt, "val-max-restart", val_max_restart)
1277         else O_YNO(opt, "qname-minimisation", qname_minimisation)
1278         else O_YNO(opt, "qname-minimisation-strict", qname_minimisation_strict)
1279         else O_IFC(opt, "define-tag", num_tags, tagname)
1280         else O_LTG(opt, "local-zone-tag", local_zone_tags)
1281         else O_LTG(opt, "access-control-tag", acl_tags)
1282         else O_LTG(opt, "response-ip-tag", respip_tags)
1283         else O_LS3(opt, "local-zone-override", local_zone_overrides)
1284         else O_LS3(opt, "access-control-tag-action", acl_tag_actions)
1285         else O_LS3(opt, "access-control-tag-data", acl_tag_datas)
1286         else O_LS2(opt, "access-control-view", acl_view)
1287         else O_LS2(opt, "interface-action", interface_actions)
1288         else O_LTG(opt, "interface-tag", interface_tags)
1289         else O_LS3(opt, "interface-tag-action", interface_tag_actions)
1290         else O_LS3(opt, "interface-tag-data", interface_tag_datas)
1291         else O_LS2(opt, "interface-view", interface_view)
1292         else O_YNO(opt, "pad-responses", pad_responses)
1293         else O_DEC(opt, "pad-responses-block-size", pad_responses_block_size)
1294         else O_YNO(opt, "pad-queries", pad_queries)
1295         else O_DEC(opt, "pad-queries-block-size", pad_queries_block_size)
1296         else O_LS2(opt, "edns-client-strings", edns_client_strings)
1297         else O_LST(opt, "proxy-protocol-port", proxy_protocol_port)
1298 #ifdef USE_IPSECMOD
1299         else O_YNO(opt, "ipsecmod-enabled", ipsecmod_enabled)
1300         else O_YNO(opt, "ipsecmod-ignore-bogus", ipsecmod_ignore_bogus)
1301         else O_STR(opt, "ipsecmod-hook", ipsecmod_hook)
1302         else O_DEC(opt, "ipsecmod-max-ttl", ipsecmod_max_ttl)
1303         else O_LST(opt, "ipsecmod-whitelist", ipsecmod_whitelist)
1304         else O_YNO(opt, "ipsecmod-strict", ipsecmod_strict)
1305 #endif
1306 #ifdef USE_CACHEDB
1307         else O_STR(opt, "backend", cachedb_backend)
1308         else O_STR(opt, "secret-seed", cachedb_secret)
1309 #ifdef USE_REDIS
1310         else O_STR(opt, "redis-server-host", redis_server_host)
1311         else O_DEC(opt, "redis-server-port", redis_server_port)
1312         else O_STR(opt, "redis-server-path", redis_server_path)
1313         else O_STR(opt, "redis-server-password", redis_server_password)
1314         else O_DEC(opt, "redis-timeout", redis_timeout)
1315         else O_YNO(opt, "redis-expire-records", redis_expire_records)
1316 #endif  /* USE_REDIS */
1317 #endif  /* USE_CACHEDB */
1318 #ifdef USE_IPSET
1319         else O_STR(opt, "name-v4", ipset_name_v4)
1320         else O_STR(opt, "name-v6", ipset_name_v6)
1321 #endif
1322         /* not here:
1323          * outgoing-permit, outgoing-avoid - have list of ports
1324          * local-zone - zones and nodefault variables
1325          * local-data - see below
1326          * local-data-ptr - converted to local-data entries
1327          * stub-zone, name, stub-addr, stub-host, stub-prime
1328          * forward-zone, name, forward-addr, forward-host
1329          */
1330         else return 0;
1331         return 1;
1332 }
1333
1334 /** initialize the global cfg_parser object */
1335 static void
1336 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
1337 {
1338         static struct config_parser_state st;
1339         cfg_parser = &st;
1340         cfg_parser->filename = filename;
1341         cfg_parser->line = 1;
1342         cfg_parser->errors = 0;
1343         cfg_parser->cfg = cfg;
1344         cfg_parser->chroot = chroot;
1345         cfg_parser->started_toplevel = 0;
1346         init_cfg_parse();
1347 }
1348
1349 int
1350 config_read(struct config_file* cfg, const char* filename, const char* chroot)
1351 {
1352         FILE *in;
1353         char *fname = (char*)filename;
1354 #ifdef HAVE_GLOB
1355         glob_t g;
1356         size_t i;
1357         int r, flags;
1358 #endif
1359         if(!fname)
1360                 return 1;
1361
1362         /* check for wildcards */
1363 #ifdef HAVE_GLOB
1364         if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') &&
1365                 !strchr(fname, '{') && !strchr(fname, '~'))) {
1366                 verbose(VERB_QUERY, "wildcard found, processing %s", fname);
1367                 flags = 0
1368 #ifdef GLOB_ERR
1369                         | GLOB_ERR
1370 #endif
1371 #ifdef GLOB_NOSORT
1372                         | GLOB_NOSORT
1373 #endif
1374 #ifdef GLOB_BRACE
1375                         | GLOB_BRACE
1376 #endif
1377 #ifdef GLOB_TILDE
1378                         | GLOB_TILDE
1379 #endif
1380                 ;
1381                 memset(&g, 0, sizeof(g));
1382                 r = glob(fname, flags, NULL, &g);
1383                 if(r) {
1384                         /* some error */
1385                         globfree(&g);
1386                         if(r == GLOB_NOMATCH) {
1387                                 verbose(VERB_QUERY, "include: "
1388                                 "no matches for %s", fname);
1389                                 return 1;
1390                         } else if(r == GLOB_NOSPACE) {
1391                                 log_err("include: %s: "
1392                                         "fnametern out of memory", fname);
1393                         } else if(r == GLOB_ABORTED) {
1394                                 log_err("wildcard include: %s: expansion "
1395                                         "aborted (%s)", fname, strerror(errno));
1396                         } else {
1397                                 log_err("wildcard include: %s: expansion "
1398                                         "failed (%s)", fname, strerror(errno));
1399                         }
1400                         /* ignore globs that yield no files */
1401                         return 1;
1402                 }
1403                 /* process files found, if any */
1404                 for(i=0; i<(size_t)g.gl_pathc; i++) {
1405                         if(!config_read(cfg, g.gl_pathv[i], chroot)) {
1406                                 log_err("error reading wildcard "
1407                                         "include: %s", g.gl_pathv[i]);
1408                                 globfree(&g);
1409                                 return 0;
1410                         }
1411                 }
1412                 globfree(&g);
1413                 return 1;
1414         }
1415 #endif /* HAVE_GLOB */
1416
1417         in = fopen(fname, "r");
1418         if(!in) {
1419                 log_err("Could not open %s: %s", fname, strerror(errno));
1420                 return 0;
1421         }
1422         create_cfg_parser(cfg, fname, chroot);
1423         ub_c_in = in;
1424         ub_c_parse();
1425         fclose(in);
1426
1427         if(!cfg->dnscrypt) cfg->dnscrypt_port = 0;
1428
1429         if(cfg_parser->errors != 0) {
1430                 fprintf(stderr, "read %s failed: %d errors in configuration file\n",
1431                         fname, cfg_parser->errors);
1432                 errno=EINVAL;
1433                 return 0;
1434         }
1435
1436         return 1;
1437 }
1438
1439 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm)
1440 {
1441         struct config_stub* p = *(*pp);
1442         while(p) {
1443                 if(strcmp(p->name, nm) == 0)
1444                         return p;
1445                 (*pp) = &p->next;
1446                 p = p->next;
1447         }
1448         return NULL;
1449 }
1450
1451 void
1452 config_delstrlist(struct config_strlist* p)
1453 {
1454         struct config_strlist *np;
1455         while(p) {
1456                 np = p->next;
1457                 free(p->str);
1458                 free(p);
1459                 p = np;
1460         }
1461 }
1462
1463 void
1464 config_deldblstrlist(struct config_str2list* p)
1465 {
1466         struct config_str2list *np;
1467         while(p) {
1468                 np = p->next;
1469                 free(p->str);
1470                 free(p->str2);
1471                 free(p);
1472                 p = np;
1473         }
1474 }
1475
1476 void
1477 config_deltrplstrlist(struct config_str3list* p)
1478 {
1479         struct config_str3list *np;
1480         while(p) {
1481                 np = p->next;
1482                 free(p->str);
1483                 free(p->str2);
1484                 free(p->str3);
1485                 free(p);
1486                 p = np;
1487         }
1488 }
1489
1490 void
1491 config_delauth(struct config_auth* p)
1492 {
1493         if(!p) return;
1494         free(p->name);
1495         config_delstrlist(p->masters);
1496         config_delstrlist(p->urls);
1497         config_delstrlist(p->allow_notify);
1498         free(p->zonefile);
1499         free(p->rpz_taglist);
1500         free(p->rpz_action_override);
1501         free(p->rpz_cname);
1502         free(p->rpz_log_name);
1503         free(p);
1504 }
1505
1506 void
1507 config_delauths(struct config_auth* p)
1508 {
1509         struct config_auth* np;
1510         while(p) {
1511                 np = p->next;
1512                 config_delauth(p);
1513                 p = np;
1514         }
1515 }
1516
1517 void
1518 config_delstub(struct config_stub* p)
1519 {
1520         if(!p) return;
1521         free(p->name);
1522         config_delstrlist(p->hosts);
1523         config_delstrlist(p->addrs);
1524         free(p);
1525 }
1526
1527 void
1528 config_delstubs(struct config_stub* p)
1529 {
1530         struct config_stub* np;
1531         while(p) {
1532                 np = p->next;
1533                 config_delstub(p);
1534                 p = np;
1535         }
1536 }
1537
1538 void
1539 config_delview(struct config_view* p)
1540 {
1541         if(!p) return;
1542         free(p->name);
1543         config_deldblstrlist(p->local_zones);
1544         config_delstrlist(p->local_zones_nodefault);
1545 #ifdef USE_IPSET
1546         config_delstrlist(p->local_zones_ipset);
1547 #endif
1548         config_delstrlist(p->local_data);
1549         free(p);
1550 }
1551
1552 void
1553 config_delviews(struct config_view* p)
1554 {
1555         struct config_view* np;
1556         while(p) {
1557                 np = p->next;
1558                 config_delview(p);
1559                 p = np;
1560         }
1561 }
1562
1563 void
1564 config_del_strarray(char** array, int num)
1565 {
1566         int i;
1567         if(!array)
1568                 return;
1569         for(i=0; i<num; i++) {
1570                 free(array[i]);
1571         }
1572         free(array);
1573 }
1574
1575 void
1576 config_del_strbytelist(struct config_strbytelist* p)
1577 {
1578         struct config_strbytelist* np;
1579         while(p) {
1580                 np = p->next;
1581                 free(p->str);
1582                 free(p->str2);
1583                 free(p);
1584                 p = np;
1585         }
1586 }
1587
1588 void
1589 config_delete(struct config_file* cfg)
1590 {
1591         if(!cfg) return;
1592         free(cfg->username);
1593         free(cfg->chrootdir);
1594         free(cfg->directory);
1595         free(cfg->logfile);
1596         free(cfg->pidfile);
1597         free(cfg->if_automatic_ports);
1598         free(cfg->target_fetch_policy);
1599         free(cfg->ssl_service_key);
1600         free(cfg->ssl_service_pem);
1601         free(cfg->tls_cert_bundle);
1602         config_delstrlist(cfg->tls_additional_port);
1603         config_delstrlist(cfg->tls_session_ticket_keys.first);
1604         free(cfg->tls_ciphers);
1605         free(cfg->tls_ciphersuites);
1606         free(cfg->http_endpoint);
1607         if(cfg->log_identity) {
1608                 log_ident_revert_to_default();
1609                 free(cfg->log_identity);
1610         }
1611         config_del_strarray(cfg->ifs, cfg->num_ifs);
1612         config_del_strarray(cfg->out_ifs, cfg->num_out_ifs);
1613         config_delstubs(cfg->stubs);
1614         config_delstubs(cfg->forwards);
1615         config_delauths(cfg->auths);
1616         config_delviews(cfg->views);
1617         config_delstrlist(cfg->donotqueryaddrs);
1618         config_delstrlist(cfg->root_hints);
1619 #ifdef CLIENT_SUBNET
1620         config_delstrlist(cfg->client_subnet);
1621         config_delstrlist(cfg->client_subnet_zone);
1622 #endif
1623         free(cfg->identity);
1624         free(cfg->version);
1625         free(cfg->http_user_agent);
1626         free(cfg->nsid_cfg_str);
1627         free(cfg->nsid);
1628         free(cfg->module_conf);
1629         free(cfg->outgoing_avail_ports);
1630         config_delstrlist(cfg->caps_whitelist);
1631         config_delstrlist(cfg->private_address);
1632         config_delstrlist(cfg->private_domain);
1633         config_delstrlist(cfg->auto_trust_anchor_file_list);
1634         config_delstrlist(cfg->trust_anchor_file_list);
1635         config_delstrlist(cfg->trusted_keys_file_list);
1636         config_delstrlist(cfg->trust_anchor_list);
1637         config_delstrlist(cfg->domain_insecure);
1638         config_deldblstrlist(cfg->acls);
1639         config_deldblstrlist(cfg->tcp_connection_limits);
1640         free(cfg->val_nsec3_key_iterations);
1641         config_deldblstrlist(cfg->local_zones);
1642         config_delstrlist(cfg->local_zones_nodefault);
1643 #ifdef USE_IPSET
1644         config_delstrlist(cfg->local_zones_ipset);
1645 #endif
1646         config_delstrlist(cfg->local_data);
1647         config_deltrplstrlist(cfg->local_zone_overrides);
1648         config_del_strarray(cfg->tagname, cfg->num_tags);
1649         config_del_strbytelist(cfg->local_zone_tags);
1650         config_del_strbytelist(cfg->respip_tags);
1651         config_deldblstrlist(cfg->acl_view);
1652         config_del_strbytelist(cfg->acl_tags);
1653         config_deltrplstrlist(cfg->acl_tag_actions);
1654         config_deltrplstrlist(cfg->acl_tag_datas);
1655         config_deldblstrlist(cfg->interface_actions);
1656         config_deldblstrlist(cfg->interface_view);
1657         config_del_strbytelist(cfg->interface_tags);
1658         config_deltrplstrlist(cfg->interface_tag_actions);
1659         config_deltrplstrlist(cfg->interface_tag_datas);
1660         config_delstrlist(cfg->control_ifs.first);
1661         free(cfg->server_key_file);
1662         free(cfg->server_cert_file);
1663         free(cfg->control_key_file);
1664         free(cfg->control_cert_file);
1665         free(cfg->nat64_prefix);
1666         free(cfg->dns64_prefix);
1667         config_delstrlist(cfg->dns64_ignore_aaaa);
1668         free(cfg->dnstap_socket_path);
1669         free(cfg->dnstap_ip);
1670         free(cfg->dnstap_tls_server_name);
1671         free(cfg->dnstap_tls_cert_bundle);
1672         free(cfg->dnstap_tls_client_key_file);
1673         free(cfg->dnstap_tls_client_cert_file);
1674         free(cfg->dnstap_identity);
1675         free(cfg->dnstap_version);
1676         config_deldblstrlist(cfg->ratelimit_for_domain);
1677         config_deldblstrlist(cfg->ratelimit_below_domain);
1678         config_delstrlist(cfg->python_script);
1679         config_delstrlist(cfg->dynlib_file);
1680         config_deldblstrlist(cfg->edns_client_strings);
1681         config_delstrlist(cfg->proxy_protocol_port);
1682 #ifdef USE_IPSECMOD
1683         free(cfg->ipsecmod_hook);
1684         config_delstrlist(cfg->ipsecmod_whitelist);
1685 #endif
1686 #ifdef USE_CACHEDB
1687         free(cfg->cachedb_backend);
1688         free(cfg->cachedb_secret);
1689 #ifdef USE_REDIS
1690         free(cfg->redis_server_host);
1691         free(cfg->redis_server_path);
1692         free(cfg->redis_server_password);
1693 #endif  /* USE_REDIS */
1694 #endif  /* USE_CACHEDB */
1695 #ifdef USE_IPSET
1696         free(cfg->ipset_name_v4);
1697         free(cfg->ipset_name_v6);
1698 #endif
1699         free(cfg);
1700 }
1701
1702 static void
1703 init_cookie_secret(uint8_t* cookie_secret, size_t cookie_secret_len)
1704 {
1705         struct ub_randstate *rand = ub_initstate(NULL);
1706
1707         if (!rand)
1708                 fatal_exit("could not init random generator");
1709         while (cookie_secret_len) {
1710                 *cookie_secret++ = (uint8_t)ub_random(rand);
1711                 cookie_secret_len--;
1712         }
1713         ub_randfree(rand);
1714 }
1715
1716 static void
1717 init_outgoing_availports(int* a, int num)
1718 {
1719         /* generated with make iana_update */
1720         const int iana_assigned[] = {
1721 #include "util/iana_ports.inc"
1722                 -1 }; /* end marker to put behind trailing comma */
1723
1724         int i;
1725         /* do not use <1024, that could be trouble with the system, privs */
1726         for(i=1024; i<num; i++) {
1727                 a[i] = i;
1728         }
1729         /* create empty spot at 49152 to keep ephemeral ports available
1730          * to other programs */
1731         for(i=49152; i<49152+256; i++)
1732                 a[i] = 0;
1733         /* pick out all the IANA assigned ports */
1734         for(i=0; iana_assigned[i]!=-1; i++) {
1735                 if(iana_assigned[i] < num)
1736                         a[iana_assigned[i]] = 0;
1737         }
1738 }
1739
1740 int
1741 cfg_mark_ports(const char* str, int allow, int* avail, int num)
1742 {
1743         char* mid = strchr(str, '-');
1744 #ifdef DISABLE_EXPLICIT_PORT_RANDOMISATION
1745         log_warn("Explicit port randomisation disabled, ignoring "
1746                 "outgoing-port-permit and outgoing-port-avoid configuration "
1747                 "options");
1748 #endif
1749         if(!mid) {
1750                 int port = atoi(str);
1751                 if(port == 0 && strcmp(str, "0") != 0) {
1752                         log_err("cannot parse port number '%s'", str);
1753                         return 0;
1754                 }
1755                 if(port < num)
1756                         avail[port] = (allow?port:0);
1757         } else {
1758                 int i, low, high = atoi(mid+1);
1759                 char buf[16];
1760                 if(high == 0 && strcmp(mid+1, "0") != 0) {
1761                         log_err("cannot parse port number '%s'", mid+1);
1762                         return 0;
1763                 }
1764                 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) {
1765                         log_err("cannot parse port number '%s'", str);
1766                         return 0;
1767                 }
1768                 if(mid > str)
1769                         memcpy(buf, str, (size_t)(mid-str));
1770                 buf[mid-str] = 0;
1771                 low = atoi(buf);
1772                 if(low == 0 && strcmp(buf, "0") != 0) {
1773                         log_err("cannot parse port number '%s'", buf);
1774                         return 0;
1775                 }
1776                 for(i=low; i<=high; i++) {
1777                         if(i < num)
1778                                 avail[i] = (allow?i:0);
1779                 }
1780                 return 1;
1781         }
1782         return 1;
1783 }
1784
1785 int
1786 cfg_scan_ports(int* avail, int num)
1787 {
1788         int i;
1789         int count = 0;
1790         for(i=0; i<num; i++) {
1791                 if(avail[i])
1792                         count++;
1793         }
1794         return count;
1795 }
1796
1797 int cfg_condense_ports(struct config_file* cfg, int** avail)
1798 {
1799         int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536);
1800         int i, at = 0;
1801         *avail = NULL;
1802         if(num == 0)
1803                 return 0;
1804         *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int));
1805         if(!*avail)
1806                 return 0;
1807         for(i=0; i<65536; i++) {
1808                 if(cfg->outgoing_avail_ports[i])
1809                         (*avail)[at++] = cfg->outgoing_avail_ports[i];
1810         }
1811         log_assert(at == num);
1812         return num;
1813 }
1814
1815 void cfg_apply_local_port_policy(struct config_file* cfg, int num) {
1816 (void)cfg;
1817 (void)num;
1818 #ifdef USE_LINUX_IP_LOCAL_PORT_RANGE
1819         {
1820                 int i = 0;
1821                 FILE* range_fd;
1822                 if ((range_fd = fopen(LINUX_IP_LOCAL_PORT_RANGE_PATH, "r")) != NULL) {
1823                         int min_port = 0;
1824                         int max_port = num - 1;
1825                         if (fscanf(range_fd, "%d %d", &min_port, &max_port) == 2) {
1826                                 for(i=0; i<min_port; i++) {
1827                                         cfg->outgoing_avail_ports[i] = 0;
1828                                 }
1829                                 for(i=max_port+1; i<num; i++) {
1830                                         cfg->outgoing_avail_ports[i] = 0;
1831                                 }
1832                         } else {
1833                                 log_err("unexpected port range in %s",
1834                                                 LINUX_IP_LOCAL_PORT_RANGE_PATH);
1835                         }
1836                         fclose(range_fd);
1837                 } else {
1838                         log_err("failed to read from file: %s (%s)",
1839                                         LINUX_IP_LOCAL_PORT_RANGE_PATH,
1840                                         strerror(errno));
1841                 }
1842         }
1843 #endif
1844 }
1845
1846 /** print error with file and line number */
1847 static void ub_c_error_va_list(const char *fmt, va_list args)
1848 {
1849         cfg_parser->errors++;
1850         fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
1851         cfg_parser->line);
1852         vfprintf(stderr, fmt, args);
1853         fprintf(stderr, "\n");
1854 }
1855
1856 /** print error with file and line number */
1857 void ub_c_error_msg(const char* fmt, ...)
1858 {
1859         va_list args;
1860         va_start(args, fmt);
1861         ub_c_error_va_list(fmt, args);
1862         va_end(args);
1863 }
1864
1865 void ub_c_error(const char *str)
1866 {
1867         cfg_parser->errors++;
1868         if(strcmp(str, "syntax error")==0 && cfg_parser->started_toplevel ==0)
1869                 str = "syntax error, is there no section start after an "
1870                         "include-toplevel directive perhaps.";
1871         fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
1872                 cfg_parser->line, str);
1873 }
1874
1875 int ub_c_wrap(void)
1876 {
1877         return 1;
1878 }
1879
1880 int cfg_strlist_append(struct config_strlist_head* list, char* item)
1881 {
1882         struct config_strlist *s;
1883         if(!item || !list) {
1884                 free(item);
1885                 return 0;
1886         }
1887         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1888         if(!s) {
1889                 free(item);
1890                 return 0;
1891         }
1892         s->str = item;
1893         s->next = NULL;
1894         if(list->last)
1895                 list->last->next = s;
1896         else
1897                 list->first = s;
1898         list->last = s;
1899         return 1;
1900 }
1901
1902 int
1903 cfg_region_strlist_insert(struct regional* region,
1904         struct config_strlist** head, char* item)
1905 {
1906         struct config_strlist *s;
1907         if(!item || !head)
1908                 return 0;
1909         s = (struct config_strlist*)regional_alloc_zero(region,
1910                 sizeof(struct config_strlist));
1911         if(!s)
1912                 return 0;
1913         s->str = item;
1914         s->next = *head;
1915         *head = s;
1916         return 1;
1917 }
1918
1919 struct config_strlist*
1920 cfg_strlist_find(struct config_strlist* head, const char *item)
1921 {
1922         struct config_strlist *s = head;
1923         if(!head){
1924                 return NULL;
1925         }
1926         while(s) {
1927                 if(strcmp(s->str, item) == 0) {
1928                         return s;
1929                 }
1930                 s = s->next;
1931         }
1932         return NULL;
1933 }
1934
1935 int
1936 cfg_strlist_insert(struct config_strlist** head, char* item)
1937 {
1938         struct config_strlist *s;
1939         if(!item || !head) {
1940                 free(item);
1941                 return 0;
1942         }
1943         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1944         if(!s) {
1945                 free(item);
1946                 return 0;
1947         }
1948         s->str = item;
1949         s->next = *head;
1950         *head = s;
1951         return 1;
1952 }
1953
1954 int
1955 cfg_strlist_append_ex(struct config_strlist** head, char* item)
1956 {
1957         struct config_strlist *s;
1958         if(!item || !head)
1959                 return 0;
1960         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1961         if(!s)
1962                 return 0;
1963         s->str = item;
1964         s->next = NULL;
1965
1966         if (*head==NULL) {
1967                 *head = s;
1968         } else {
1969                 struct config_strlist *last = *head;
1970                 while (last->next!=NULL) {
1971                     last = last->next;
1972                 }
1973                 last->next = s;
1974         }
1975
1976         return 1;
1977 }
1978
1979 int
1980 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
1981 {
1982         struct config_str2list *s;
1983         if(!item || !i2 || !head) {
1984                 free(item);
1985                 free(i2);
1986                 return 0;
1987         }
1988         s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
1989         if(!s) {
1990                 free(item);
1991                 free(i2);
1992                 return 0;
1993         }
1994         s->str = item;
1995         s->str2 = i2;
1996         s->next = *head;
1997         *head = s;
1998         return 1;
1999 }
2000
2001 int
2002 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2,
2003         char* i3)
2004 {
2005         struct config_str3list *s;
2006         if(!item || !i2 || !i3 || !head)
2007                 return 0;
2008         s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list));
2009         if(!s)
2010                 return 0;
2011         s->str = item;
2012         s->str2 = i2;
2013         s->str3 = i3;
2014         s->next = *head;
2015         *head = s;
2016         return 1;
2017 }
2018
2019 int
2020 cfg_strbytelist_insert(struct config_strbytelist** head, char* item,
2021         uint8_t* i2, size_t i2len)
2022 {
2023         struct config_strbytelist* s;
2024         if(!item || !i2 || !head)
2025                 return 0;
2026         s = (struct config_strbytelist*)calloc(1, sizeof(*s));
2027         if(!s)
2028                 return 0;
2029         s->str = item;
2030         s->str2 = i2;
2031         s->str2len = i2len;
2032         s->next = *head;
2033         *head = s;
2034         return 1;
2035 }
2036
2037 time_t
2038 cfg_convert_timeval(const char* str)
2039 {
2040         time_t t;
2041         struct tm tm;
2042         memset(&tm, 0, sizeof(tm));
2043         if(strlen(str) < 14)
2044                 return 0;
2045         if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
2046                 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
2047                 return 0;
2048         tm.tm_year -= 1900;
2049         tm.tm_mon--;
2050         /* Check values */
2051         if (tm.tm_year < 70)    return 0;
2052         if (tm.tm_mon < 0 || tm.tm_mon > 11)    return 0;
2053         if (tm.tm_mday < 1 || tm.tm_mday > 31)  return 0;
2054         if (tm.tm_hour < 0 || tm.tm_hour > 23)  return 0;
2055         if (tm.tm_min < 0 || tm.tm_min > 59)    return 0;
2056         if (tm.tm_sec < 0 || tm.tm_sec > 59)    return 0;
2057         /* call ldns conversion function */
2058         t = sldns_mktime_from_utc(&tm);
2059         return t;
2060 }
2061
2062 int
2063 cfg_count_numbers(const char* s)
2064 {
2065         /* format ::= (sp num)+ sp  */
2066         /* num ::= [-](0-9)+        */
2067         /* sp ::= (space|tab)*      */
2068         int num = 0;
2069         while(*s) {
2070                 while(*s && isspace((unsigned char)*s))
2071                         s++;
2072                 if(!*s) /* end of string */
2073                         break;
2074                 if(*s == '-')
2075                         s++;
2076                 if(!*s) /* only - not allowed */
2077                         return 0;
2078                 if(!isdigit((unsigned char)*s)) /* bad character */
2079                         return 0;
2080                 while(*s && isdigit((unsigned char)*s))
2081                         s++;
2082                 num++;
2083         }
2084         return num;
2085 }
2086
2087 /** all digit number */
2088 static int isalldigit(const char* str, size_t l)
2089 {
2090         size_t i;
2091         for(i=0; i<l; i++)
2092                 if(!isdigit((unsigned char)str[i]))
2093                         return 0;
2094         return 1;
2095 }
2096
2097 int
2098 cfg_parse_memsize(const char* str, size_t* res)
2099 {
2100         size_t len;
2101         size_t mult = 1;
2102         if(!str || (len=(size_t)strlen(str)) == 0) {
2103                 log_err("not a size: '%s'", str);
2104                 return 0;
2105         }
2106         if(isalldigit(str, len)) {
2107                 *res = (size_t)atol(str);
2108                 return 1;
2109         }
2110         /* check appended num */
2111         while(len>0 && str[len-1]==' ')
2112                 len--;
2113         if(len > 1 && str[len-1] == 'b')
2114                 len--;
2115         else if(len > 1 && str[len-1] == 'B')
2116                 len--;
2117
2118         if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
2119                 mult = 1024*1024*1024;
2120         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
2121                 mult = 1024*1024;
2122         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k')
2123                 mult = 1024;
2124         else if(len > 0 && isdigit((unsigned char)str[len-1]))
2125                 mult = 1;
2126         else {
2127                 log_err("unknown size specifier: '%s'", str);
2128                 return 0;
2129         }
2130         while(len>1 && str[len-2]==' ')
2131                 len--;
2132
2133         if(!isalldigit(str, len-1)) {
2134                 log_err("unknown size specifier: '%s'", str);
2135                 return 0;
2136         }
2137         *res = ((size_t)atol(str)) * mult;
2138         return 1;
2139 }
2140
2141 int
2142 find_tag_id(struct config_file* cfg, const char* tag)
2143 {
2144         int i;
2145         for(i=0; i<cfg->num_tags; i++) {
2146                 if(strcmp(cfg->tagname[i], tag) == 0)
2147                         return i;
2148         }
2149         return -1;
2150 }
2151
2152 int
2153 config_add_tag(struct config_file* cfg, const char* tag)
2154 {
2155         char** newarray;
2156         char* newtag;
2157         if(find_tag_id(cfg, tag) != -1)
2158                 return 1; /* nothing to do */
2159         newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1));
2160         if(!newarray)
2161                 return 0;
2162         newtag = strdup(tag);
2163         if(!newtag) {
2164                 free(newarray);
2165                 return 0;
2166         }
2167         if(cfg->tagname) {
2168                 memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags);
2169                 free(cfg->tagname);
2170         }
2171         newarray[cfg->num_tags++] = newtag;
2172         cfg->tagname = newarray;
2173         return 1;
2174 }
2175
2176 /** set a bit in a bit array */
2177 static void
2178 cfg_set_bit(uint8_t* bitlist, size_t len, int id)
2179 {
2180         int pos = id/8;
2181         log_assert((size_t)pos < len);
2182         (void)len;
2183         bitlist[pos] |= 1<<(id%8);
2184 }
2185
2186 uint8_t* config_parse_taglist(struct config_file* cfg, char* str,
2187         size_t* listlen)
2188 {
2189         uint8_t* taglist = NULL;
2190         size_t len = 0;
2191         char* p, *s;
2192
2193         /* allocate */
2194         if(cfg->num_tags == 0) {
2195                 log_err("parse taglist, but no tags defined");
2196                 return 0;
2197         }
2198         len = (size_t)(cfg->num_tags+7)/8;
2199         taglist = calloc(1, len);
2200         if(!taglist) {
2201                 log_err("out of memory");
2202                 return 0;
2203         }
2204
2205         /* parse */
2206         s = str;
2207         while((p=strsep(&s, " \t\n")) != NULL) {
2208                 if(*p) {
2209                         int id = find_tag_id(cfg, p);
2210                         /* set this bit in the bitlist */
2211                         if(id == -1) {
2212                                 log_err("unknown tag: %s", p);
2213                                 free(taglist);
2214                                 return 0;
2215                         }
2216                         cfg_set_bit(taglist, len, id);
2217                 }
2218         }
2219
2220         *listlen = len;
2221         return taglist;
2222 }
2223
2224 uint8_t* cfg_parse_nsid(const char* str, uint16_t* nsid_len)
2225 {
2226         uint8_t* nsid = NULL;
2227
2228         if (strncasecmp(str, "ascii_", 6) == 0) {
2229                 if ((nsid = (uint8_t *)strdup(str + 6)))
2230                         *nsid_len = strlen(str + 6);
2231
2232         } else if (strlen(str) % 2) {
2233                 ; /* hex string has even number of characters */
2234         }
2235
2236         else if (*str && (nsid = calloc(1, strlen(str) / 2))) {
2237                 const char *ch;
2238                 uint8_t *dp;
2239
2240                 for ( ch = str, dp = nsid
2241                     ; isxdigit(ch[0]) && isxdigit(ch[1])
2242                     ; ch += 2, dp++) {
2243                         *dp  = (uint8_t)sldns_hexdigit_to_int(ch[0]) * 16;
2244                         *dp += (uint8_t)sldns_hexdigit_to_int(ch[1]);
2245                 }
2246                 if (*ch) {
2247                         free(nsid);
2248                         nsid = NULL;
2249                 } else
2250                         *nsid_len = strlen(str) / 2;
2251         }
2252         return nsid;
2253 }
2254
2255
2256 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist,
2257         size_t taglen)
2258 {
2259         char buf[10240];
2260         size_t i, j, len = 0;
2261         buf[0] = 0;
2262         for(i=0; i<taglen; i++) {
2263                 if(taglist[i] == 0)
2264                         continue;
2265                 for(j=0; j<8; j++) {
2266                         if((taglist[i] & (1<<j)) != 0) {
2267                                 size_t id = i*8 + j;
2268                                 snprintf(buf+len, sizeof(buf)-len, "%s%s",
2269                                         (len==0?"":" "), cfg->tagname[id]);
2270                                 len += strlen(buf+len);
2271                         }
2272                 }
2273         }
2274         return strdup(buf);
2275 }
2276
2277 int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2,
2278         size_t list2len)
2279 {
2280         size_t i;
2281         if(!list1 || !list2)
2282                 return 0;
2283         for(i=0; i<list1len && i<list2len; i++) {
2284                 if((list1[i] & list2[i]) != 0)
2285                         return 1;
2286         }
2287         return 0;
2288 }
2289
2290 void
2291 config_apply(struct config_file* config)
2292 {
2293         MAX_TTL = (time_t)config->max_ttl;
2294         MIN_TTL = (time_t)config->min_ttl;
2295         SERVE_EXPIRED = config->serve_expired;
2296         SERVE_EXPIRED_TTL = (time_t)config->serve_expired_ttl;
2297         SERVE_EXPIRED_REPLY_TTL = (time_t)config->serve_expired_reply_ttl;
2298         SERVE_ORIGINAL_TTL = config->serve_original_ttl;
2299         MAX_NEG_TTL = (time_t)config->max_negative_ttl;
2300         RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
2301         RTT_MAX_TIMEOUT = config->infra_cache_max_rtt;
2302         EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
2303         MINIMAL_RESPONSES = config->minimal_responses;
2304         RRSET_ROUNDROBIN = config->rrset_roundrobin;
2305         LOG_TAG_QUERYREPLY = config->log_tag_queryreply;
2306         UNKNOWN_SERVER_NICENESS = config->unknown_server_time_limit;
2307         USEFUL_SERVER_TOP_TIMEOUT = RTT_MAX_TIMEOUT;
2308         BLACKLIST_PENALTY = USEFUL_SERVER_TOP_TIMEOUT*4;
2309         log_set_time_asc(config->log_time_ascii);
2310         autr_permit_small_holddown = config->permit_small_holddown;
2311         stream_wait_max = config->stream_wait_size;
2312         http2_query_buffer_max = config->http_query_buffer_size;
2313         http2_response_buffer_max = config->http_response_buffer_size;
2314 }
2315
2316 void config_lookup_uid(struct config_file* cfg)
2317 {
2318 #ifdef HAVE_GETPWNAM
2319         /* translate username into uid and gid */
2320         if(cfg->username && cfg->username[0]) {
2321                 struct passwd *pwd;
2322                 if((pwd = getpwnam(cfg->username)) != NULL) {
2323                         cfg_uid = pwd->pw_uid;
2324                         cfg_gid = pwd->pw_gid;
2325                 }
2326         }
2327 #else
2328         (void)cfg;
2329 #endif
2330 }
2331
2332 /**
2333  * Calculate string length of full pathname in original filesys
2334  * @param fname: the path name to convert.
2335  *      Must not be null or empty.
2336  * @param cfg: config struct for chroot and chdir (if set).
2337  * @param use_chdir: if false, only chroot is applied.
2338  * @return length of string.
2339  *      remember to allocate one more for 0 at end in mallocs.
2340  */
2341 static size_t
2342 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2343 {
2344         size_t len = 0;
2345         int slashit = 0;
2346         if(cfg->chrootdir && cfg->chrootdir[0] &&
2347                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2348                 /* already full pathname, return it */
2349                 return strlen(fname);
2350         }
2351         /* chroot */
2352         if(cfg->chrootdir && cfg->chrootdir[0]) {
2353                 /* start with chrootdir */
2354                 len += strlen(cfg->chrootdir);
2355                 slashit = 1;
2356         }
2357         /* chdir */
2358 #ifdef UB_ON_WINDOWS
2359         if(fname[0] != 0 && fname[1] == ':') {
2360                 /* full path, no chdir */
2361         } else
2362 #endif
2363         if(fname[0] == '/' || !use_chdir) {
2364                 /* full path, no chdir */
2365         } else if(cfg->directory && cfg->directory[0]) {
2366                 /* prepend chdir */
2367                 if(slashit && cfg->directory[0] != '/')
2368                         len++;
2369                 if(cfg->chrootdir && cfg->chrootdir[0] &&
2370                         strncmp(cfg->chrootdir, cfg->directory,
2371                         strlen(cfg->chrootdir)) == 0)
2372                         len += strlen(cfg->directory)-strlen(cfg->chrootdir);
2373                 else    len += strlen(cfg->directory);
2374                 slashit = 1;
2375         }
2376         /* fname */
2377         if(slashit && fname[0] != '/')
2378                 len++;
2379         len += strlen(fname);
2380         return len;
2381 }
2382
2383 char*
2384 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2385 {
2386         size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1;
2387         int slashit = 0;
2388         char* buf = (char*)malloc(len);
2389         if(!buf)
2390                 return NULL;
2391         buf[0] = 0;
2392         /* is fname already in chroot ? */
2393         if(cfg->chrootdir && cfg->chrootdir[0] &&
2394                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2395                 /* already full pathname, return it */
2396                 (void)strlcpy(buf, fname, len);
2397                 buf[len-1] = 0;
2398                 return buf;
2399         }
2400         /* chroot */
2401         if(cfg->chrootdir && cfg->chrootdir[0]) {
2402                 /* start with chrootdir */
2403                 (void)strlcpy(buf, cfg->chrootdir, len);
2404                 slashit = 1;
2405         }
2406 #ifdef UB_ON_WINDOWS
2407         if(fname[0] != 0 && fname[1] == ':') {
2408                 /* full path, no chdir */
2409         } else
2410 #endif
2411         /* chdir */
2412         if(fname[0] == '/' || !use_chdir) {
2413                 /* full path, no chdir */
2414         } else if(cfg->directory && cfg->directory[0]) {
2415                 /* prepend chdir */
2416                 if(slashit && cfg->directory[0] != '/')
2417                         (void)strlcat(buf, "/", len);
2418                 /* is the directory already in the chroot? */
2419                 if(cfg->chrootdir && cfg->chrootdir[0] &&
2420                         strncmp(cfg->chrootdir, cfg->directory,
2421                         strlen(cfg->chrootdir)) == 0)
2422                         (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
2423                                    len);
2424                 else (void)strlcat(buf, cfg->directory, len);
2425                 slashit = 1;
2426         }
2427         /* fname */
2428         if(slashit && fname[0] != '/')
2429                 (void)strlcat(buf, "/", len);
2430         (void)strlcat(buf, fname, len);
2431         buf[len-1] = 0;
2432         return buf;
2433 }
2434
2435 /** return next space character in string */
2436 static char* next_space_pos(const char* str)
2437 {
2438         char* sp = strchr(str, ' ');
2439         char* tab = strchr(str, '\t');
2440         if(!tab && !sp)
2441                 return NULL;
2442         if(!sp) return tab;
2443         if(!tab) return sp;
2444         return (sp<tab)?sp:tab;
2445 }
2446
2447 /** return last space character in string */
2448 static char* last_space_pos(const char* str)
2449 {
2450         char* sp = strrchr(str, ' ');
2451         char* tab = strrchr(str, '\t');
2452         if(!tab && !sp)
2453                 return NULL;
2454         if(!sp) return tab;
2455         if(!tab) return sp;
2456         return (sp>tab)?sp:tab;
2457 }
2458
2459 int
2460 cfg_parse_local_zone(struct config_file* cfg, const char* val)
2461 {
2462         const char *type, *name_end, *name;
2463         char buf[256];
2464
2465         /* parse it as: [zone_name] [between stuff] [zone_type] */
2466         name = val;
2467         while(*name && isspace((unsigned char)*name))
2468                 name++;
2469         if(!*name) {
2470                 log_err("syntax error: too short: %s", val);
2471                 return 0;
2472         }
2473         name_end = next_space_pos(name);
2474         if(!name_end || !*name_end) {
2475                 log_err("syntax error: expected zone type: %s", val);
2476                 return 0;
2477         }
2478         if (name_end - name > 255) {
2479                 log_err("syntax error: bad zone name: %s", val);
2480                 return 0;
2481         }
2482         (void)strlcpy(buf, name, sizeof(buf));
2483         buf[name_end-name] = '\0';
2484
2485         type = last_space_pos(name_end);
2486         while(type && *type && isspace((unsigned char)*type))
2487                 type++;
2488         if(!type || !*type) {
2489                 log_err("syntax error: expected zone type: %s", val);
2490                 return 0;
2491         }
2492
2493         if(strcmp(type, "nodefault")==0) {
2494                 return cfg_strlist_insert(&cfg->local_zones_nodefault,
2495                         strdup(name));
2496 #ifdef USE_IPSET
2497         } else if(strcmp(type, "ipset")==0) {
2498                 return cfg_strlist_insert(&cfg->local_zones_ipset,
2499                         strdup(name));
2500 #endif
2501         } else {
2502                 return cfg_str2list_insert(&cfg->local_zones, strdup(buf),
2503                         strdup(type));
2504         }
2505 }
2506
2507 char* cfg_ptr_reverse(char* str)
2508 {
2509         char* ip, *ip_end;
2510         char* name;
2511         char* result;
2512         char buf[1024];
2513         struct sockaddr_storage addr;
2514         socklen_t addrlen;
2515
2516         /* parse it as: [IP] [between stuff] [name] */
2517         ip = str;
2518         while(*ip && isspace((unsigned char)*ip))
2519                 ip++;
2520         if(!*ip) {
2521                 log_err("syntax error: too short: %s", str);
2522                 return NULL;
2523         }
2524         ip_end = next_space_pos(ip);
2525         if(!ip_end || !*ip_end) {
2526                 log_err("syntax error: expected name: %s", str);
2527                 return NULL;
2528         }
2529
2530         name = last_space_pos(ip_end);
2531         if(!name || !*name) {
2532                 log_err("syntax error: expected name: %s", str);
2533                 return NULL;
2534         }
2535
2536         sscanf(ip, "%100s", buf);
2537         buf[sizeof(buf)-1]=0;
2538
2539         if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) {
2540                 log_err("syntax error: cannot parse address: %s", str);
2541                 return NULL;
2542         }
2543
2544         /* reverse IPv4:
2545          * ddd.ddd.ddd.ddd.in-addr-arpa.
2546          * IPv6: (h.){32}.ip6.arpa.  */
2547
2548         if(addr_is_ip6(&addr, addrlen)) {
2549                 uint8_t ad[16];
2550                 const char* hex = "0123456789abcdef";
2551                 char *p = buf;
2552                 int i;
2553                 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
2554                         sizeof(ad));
2555                 for(i=15; i>=0; i--) {
2556                         uint8_t b = ad[i];
2557                         *p++ = hex[ (b&0x0f) ];
2558                         *p++ = '.';
2559                         *p++ = hex[ (b&0xf0) >> 4 ];
2560                         *p++ = '.';
2561                 }
2562                 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
2563         } else {
2564                 uint8_t ad[4];
2565                 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
2566                         sizeof(ad));
2567                 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
2568                         (unsigned)ad[3], (unsigned)ad[2],
2569                         (unsigned)ad[1], (unsigned)ad[0]);
2570         }
2571
2572         /* printed the reverse address, now the between goop and name on end */
2573         while(*ip_end && isspace((unsigned char)*ip_end))
2574                 ip_end++;
2575         if(name>ip_end) {
2576                 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s",
2577                         (int)(name-ip_end), ip_end);
2578         }
2579         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name);
2580
2581         result = strdup(buf);
2582         if(!result) {
2583                 log_err("out of memory parsing %s", str);
2584                 return NULL;
2585         }
2586         return result;
2587 }
2588
2589 #ifdef UB_ON_WINDOWS
2590 char*
2591 w_lookup_reg_str(const char* key, const char* name)
2592 {
2593         HKEY hk = NULL;
2594         DWORD type = 0;
2595         BYTE buf[1024];
2596         DWORD len = (DWORD)sizeof(buf);
2597         LONG ret;
2598         char* result = NULL;
2599         ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
2600         if(ret == ERROR_FILE_NOT_FOUND)
2601                 return NULL; /* key does not exist */
2602         else if(ret != ERROR_SUCCESS) {
2603                 log_err("RegOpenKeyEx failed");
2604                 return NULL;
2605         }
2606         ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
2607         if(RegCloseKey(hk))
2608                 log_err("RegCloseKey");
2609         if(ret == ERROR_FILE_NOT_FOUND)
2610                 return NULL; /* name does not exist */
2611         else if(ret != ERROR_SUCCESS) {
2612                 log_err("RegQueryValueEx failed");
2613                 return NULL;
2614         }
2615         if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
2616                 buf[sizeof(buf)-1] = 0;
2617                 buf[sizeof(buf)-2] = 0; /* for multi_sz */
2618                 result = strdup((char*)buf);
2619                 if(!result) log_err("out of memory");
2620         }
2621         return result;
2622 }
2623
2624 void w_config_adjust_directory(struct config_file* cfg)
2625 {
2626         if(cfg->directory && cfg->directory[0]) {
2627                 TCHAR dirbuf[2*MAX_PATH+4];
2628                 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) {
2629                         /* get executable path, and if that contains
2630                          * directories, snip off the filename part */
2631                         dirbuf[0] = 0;
2632                         if(!GetModuleFileName(NULL, dirbuf, MAX_PATH))
2633                                 log_err("could not GetModuleFileName");
2634                         if(strrchr(dirbuf, '\\')) {
2635                                 (strrchr(dirbuf, '\\'))[0] = 0;
2636                         } else log_err("GetModuleFileName had no path");
2637                         if(dirbuf[0]) {
2638                                 /* adjust directory for later lookups to work*/
2639                                 free(cfg->directory);
2640                                 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1);
2641                         }
2642                 }
2643         }
2644 }
2645 #endif /* UB_ON_WINDOWS */
2646
2647 int options_remote_is_address(struct config_file* cfg)
2648 {
2649         if(!cfg->remote_control_enable) return 0;
2650         if(!cfg->control_ifs.first) return 1;
2651         if(!cfg->control_ifs.first->str) return 1;
2652         if(cfg->control_ifs.first->str[0] == 0) return 1;
2653         return (cfg->control_ifs.first->str[0] != '/');
2654 }
2655
2656 /** see if interface is https, its port number == the https port number */
2657 int
2658 if_is_https(const char* ifname, const char* port, int https_port)
2659 {
2660         char* p = strchr(ifname, '@');
2661         if(!p && atoi(port) == https_port)
2662                 return 1;
2663         if(p && atoi(p+1) == https_port)
2664                 return 1;
2665         return 0;
2666 }
2667
2668 /** see if config contains https turned on */
2669 int cfg_has_https(struct config_file* cfg)
2670 {
2671         int i;
2672         char portbuf[32];
2673         snprintf(portbuf, sizeof(portbuf), "%d", cfg->port);
2674         for(i = 0; i<cfg->num_ifs; i++) {
2675                 if(if_is_https(cfg->ifs[i], portbuf, cfg->https_port))
2676                         return 1;
2677         }
2678         return 0;
2679 }
2680
2681 /** see if interface is PROXYv2, its port number == the proxy port number */
2682 int
2683 if_is_pp2(const char* ifname, const char* port,
2684         struct config_strlist* proxy_protocol_port)
2685 {
2686         struct config_strlist* s;
2687         char* p = strchr(ifname, '@');
2688         for(s = proxy_protocol_port; s; s = s->next) {
2689                 if(p && atoi(p+1) == atoi(s->str))
2690                         return 1;
2691                 if(!p && atoi(port) == atoi(s->str))
2692                         return 1;
2693         }
2694         return 0;
2695 }
2696
2697 /** see if interface is DNSCRYPT, its port number == the dnscrypt port number */
2698 int
2699 if_is_dnscrypt(const char* ifname, const char* port, int dnscrypt_port)
2700 {
2701 #ifdef USE_DNSCRYPT
2702         return ((strchr(ifname, '@') &&
2703                 atoi(strchr(ifname, '@')+1) == dnscrypt_port) ||
2704                 (!strchr(ifname, '@') && atoi(port) == dnscrypt_port));
2705 #else
2706         (void)ifname;
2707         (void)port;
2708         (void)dnscrypt_port;
2709         return 0;
2710 #endif
2711 }