contrib/unbound/util/config_file.c

   1 /*
   2  * util/config_file.c - reads and stores the config file for unbound.
   3  *
   4  * Copyright (c) 2007, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file contains functions for the config file.
  40  */
  41
  42 #include "config.h"
  43 #include <ctype.h>
  44 #include <stdarg.h>
  45 #ifdef HAVE_TIME_H
  46 #include <time.h>
  47 #endif
  48 #include "util/log.h"
  49 #include "util/configyyrename.h"
  50 #include "util/config_file.h"
  51 #include "configparser.h"
  52 #include "util/net_help.h"
  53 #include "util/data/msgparse.h"
  54 #include "util/module.h"
  55 #include "util/regional.h"
  56 #include "util/fptr_wlist.h"
  57 #include "util/data/dname.h"
  58 #include "util/rtt.h"
  59 #include "services/cache/infra.h"
  60 #include "sldns/wire2str.h"
  61 #include "sldns/parseutil.h"
  62 #include "iterator/iterator.h"
  63 #ifdef HAVE_GLOB_H
  64 # include <glob.h>
  65 #endif
  66 #ifdef CLIENT_SUBNET
  67 #include "edns-subnet/edns-subnet.h"
  68 #endif
  69 #ifdef HAVE_PWD_H
  70 #include <pwd.h>
  71 #endif
  72
  73 /** from cfg username, after daemonize setup performed */
  74 uid_t cfg_uid = (uid_t)-1;
  75 /** from cfg username, after daemonize setup performed */
  76 gid_t cfg_gid = (gid_t)-1;
  77 /** for debug allow small timeout values for fast rollovers */
  78 int autr_permit_small_holddown = 0;
  79 /** size (in bytes) of stream wait buffers max */
  80 size_t stream_wait_max = 4 * 1024 * 1024;
  81
  82 /** global config during parsing */
  83 struct config_parser_state* cfg_parser = 0;
  84
  85 /** init ports possible for use */
  86 static void init_outgoing_availports(int* array, int num);
  87
  88 struct config_file*
  89 config_create(void)
  90 {
  91         struct config_file* cfg;
  92         cfg = (struct config_file*)calloc(1, sizeof(struct config_file));
  93         if(!cfg)
  94                 return NULL;
  95         /* the defaults if no config is present */
  96         cfg->verbosity = 1;
  97         cfg->stat_interval = 0;
  98         cfg->stat_cumulative = 0;
  99         cfg->stat_extended = 0;
 100         cfg->num_threads = 1;
 101         cfg->port = UNBOUND_DNS_PORT;
 102         cfg->do_ip4 = 1;
 103         cfg->do_ip6 = 1;
 104         cfg->do_udp = 1;
 105         cfg->do_tcp = 1;
 106         cfg->tcp_upstream = 0;
 107         cfg->udp_upstream_without_downstream = 0;
 108         cfg->tcp_mss = 0;
 109         cfg->outgoing_tcp_mss = 0;
 110         cfg->tcp_idle_timeout = 30 * 1000; /* 30s in millisecs */
 111         cfg->do_tcp_keepalive = 0;
 112         cfg->tcp_keepalive_timeout = 120 * 1000; /* 120s in millisecs */
 113         cfg->ssl_service_key = NULL;
 114         cfg->ssl_service_pem = NULL;
 115         cfg->ssl_port = UNBOUND_DNS_OVER_TLS_PORT;
 116         cfg->ssl_upstream = 0;
 117         cfg->tls_cert_bundle = NULL;
 118         cfg->tls_win_cert = 0;
 119         cfg->tls_use_sni = 1;
 120         cfg->use_syslog = 1;
 121         cfg->log_identity = NULL; /* changed later with argv[0] */
 122         cfg->log_time_ascii = 0;
 123         cfg->log_queries = 0;
 124         cfg->log_replies = 0;
 125         cfg->log_tag_queryreply = 0;
 126         cfg->log_local_actions = 0;
 127         cfg->log_servfail = 0;
 128 #ifndef USE_WINSOCK
 129 #  ifdef USE_MINI_EVENT
 130         /* select max 1024 sockets */
 131         cfg->outgoing_num_ports = 960;
 132         cfg->num_queries_per_thread = 512;
 133 #  else
 134         /* libevent can use many sockets */
 135         cfg->outgoing_num_ports = 4096;
 136         cfg->num_queries_per_thread = 1024;
 137 #  endif
 138         cfg->outgoing_num_tcp = 10;
 139         cfg->incoming_num_tcp = 10;
 140 #else
 141         cfg->outgoing_num_ports = 48; /* windows is limited in num fds */
 142         cfg->num_queries_per_thread = 24;
 143         cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */
 144         cfg->incoming_num_tcp = 2;
 145 #endif
 146         cfg->stream_wait_size = 4 * 1024 * 1024;
 147         cfg->edns_buffer_size = 4096; /* 4k from rfc recommendation */
 148         cfg->msg_buffer_size = 65552; /* 64 k + a small margin */
 149         cfg->msg_cache_size = 4 * 1024 * 1024;
 150         cfg->msg_cache_slabs = 4;
 151         cfg->jostle_time = 200;
 152         cfg->rrset_cache_size = 4 * 1024 * 1024;
 153         cfg->rrset_cache_slabs = 4;
 154         cfg->host_ttl = 900;
 155         cfg->bogus_ttl = 60;
 156         cfg->min_ttl = 0;
 157         cfg->max_ttl = 3600 * 24;
 158         cfg->max_negative_ttl = 3600;
 159         cfg->prefetch = 0;
 160         cfg->prefetch_key = 0;
 161         cfg->deny_any = 0;
 162         cfg->infra_cache_slabs = 4;
 163         cfg->infra_cache_numhosts = 10000;
 164         cfg->infra_cache_min_rtt = 50;
 165         cfg->delay_close = 0;
 166         if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int))))
 167                 goto error_exit;
 168         init_outgoing_availports(cfg->outgoing_avail_ports, 65536);
 169         if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit;
 170 #ifdef HAVE_CHROOT
 171         if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit;
 172 #endif
 173         if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit;
 174         if(!(cfg->logfile = strdup(""))) goto error_exit;
 175         if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit;
 176         if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit;
 177         cfg->fast_server_permil = 0;
 178         cfg->fast_server_num = 3;
 179         cfg->donotqueryaddrs = NULL;
 180         cfg->donotquery_localhost = 1;
 181         cfg->root_hints = NULL;
 182         cfg->use_systemd = 0;
 183         cfg->do_daemonize = 1;
 184         cfg->if_automatic = 0;
 185         cfg->so_rcvbuf = 0;
 186         cfg->so_sndbuf = 0;
 187         cfg->so_reuseport = REUSEPORT_DEFAULT;
 188         cfg->ip_transparent = 0;
 189         cfg->ip_freebind = 0;
 190         cfg->ip_dscp = 0;
 191         cfg->num_ifs = 0;
 192         cfg->ifs = NULL;
 193         cfg->num_out_ifs = 0;
 194         cfg->out_ifs = NULL;
 195         cfg->stubs = NULL;
 196         cfg->forwards = NULL;
 197         cfg->auths = NULL;
 198 #ifdef CLIENT_SUBNET
 199         cfg->client_subnet = NULL;
 200         cfg->client_subnet_zone = NULL;
 201         cfg->client_subnet_opcode = LDNS_EDNS_CLIENT_SUBNET;
 202         cfg->client_subnet_always_forward = 0;
 203         cfg->max_client_subnet_ipv4 = 24;
 204         cfg->max_client_subnet_ipv6 = 56;
 205         cfg->min_client_subnet_ipv4 = 0;
 206         cfg->min_client_subnet_ipv6 = 0;
 207         cfg->max_ecs_tree_size_ipv4 = 100;
 208         cfg->max_ecs_tree_size_ipv6 = 100;
 209 #endif
 210         cfg->views = NULL;
 211         cfg->acls = NULL;
 212         cfg->tcp_connection_limits = NULL;
 213         cfg->harden_short_bufsize = 0;
 214         cfg->harden_large_queries = 0;
 215         cfg->harden_glue = 1;
 216         cfg->harden_dnssec_stripped = 1;
 217         cfg->harden_below_nxdomain = 1;
 218         cfg->harden_referral_path = 0;
 219         cfg->harden_algo_downgrade = 0;
 220         cfg->use_caps_bits_for_id = 0;
 221         cfg->caps_whitelist = NULL;
 222         cfg->private_address = NULL;
 223         cfg->private_domain = NULL;
 224         cfg->unwanted_threshold = 0;
 225         cfg->hide_identity = 0;
 226         cfg->hide_version = 0;
 227         cfg->hide_trustanchor = 0;
 228         cfg->identity = NULL;
 229         cfg->version = NULL;
 230         cfg->auto_trust_anchor_file_list = NULL;
 231         cfg->trust_anchor_file_list = NULL;
 232         cfg->trust_anchor_list = NULL;
 233         cfg->trusted_keys_file_list = NULL;
 234         cfg->trust_anchor_signaling = 1;
 235         cfg->root_key_sentinel = 1;
 236         cfg->dlv_anchor_file = NULL;
 237         cfg->dlv_anchor_list = NULL;
 238         cfg->domain_insecure = NULL;
 239         cfg->val_date_override = 0;
 240         cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */
 241         cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */
 242         cfg->val_clean_additional = 1;
 243         cfg->val_log_level = 0;
 244         cfg->val_log_squelch = 0;
 245         cfg->val_permissive_mode = 0;
 246         cfg->aggressive_nsec = 0;
 247         cfg->ignore_cd = 0;
 248         cfg->serve_expired = 0;
 249         cfg->serve_expired_ttl = 0;
 250         cfg->serve_expired_ttl_reset = 0;
 251         cfg->serve_expired_reply_ttl = 30;
 252         cfg->serve_expired_client_timeout = 0;
 253         cfg->add_holddown = 30*24*3600;
 254         cfg->del_holddown = 30*24*3600;
 255         cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */
 256         cfg->permit_small_holddown = 0;
 257         cfg->key_cache_size = 4 * 1024 * 1024;
 258         cfg->key_cache_slabs = 4;
 259         cfg->neg_cache_size = 1 * 1024 * 1024;
 260         cfg->local_zones = NULL;
 261         cfg->local_zones_nodefault = NULL;
 262 #ifdef USE_IPSET
 263         cfg->local_zones_ipset = NULL;
 264 #endif
 265         cfg->local_zones_disable_default = 0;
 266         cfg->local_data = NULL;
 267         cfg->local_zone_overrides = NULL;
 268         cfg->unblock_lan_zones = 0;
 269         cfg->insecure_lan_zones = 0;
 270         cfg->python_script = NULL;
 271         cfg->dynlib_file = NULL;
 272         cfg->remote_control_enable = 0;
 273         cfg->control_ifs.first = NULL;
 274         cfg->control_ifs.last = NULL;
 275         cfg->control_port = UNBOUND_CONTROL_PORT;
 276         cfg->control_use_cert = 1;
 277         cfg->minimal_responses = 1;
 278         cfg->rrset_roundrobin = 1;
 279         cfg->unknown_server_time_limit = 376;
 280         cfg->max_udp_size = 4096;
 281         if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
 282                 goto error_exit;
 283         if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
 284                 goto error_exit;
 285         if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
 286                 goto error_exit;
 287         if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
 288                 goto error_exit;
 289
 290 #ifdef CLIENT_SUBNET
 291         if(!(cfg->module_conf = strdup("subnetcache validator iterator"))) goto error_exit;
 292 #else
 293         if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
 294 #endif
 295         if(!(cfg->val_nsec3_key_iterations =
 296                 strdup("1024 150 2048 500 4096 2500"))) goto error_exit;
 297 #if defined(DNSTAP_SOCKET_PATH)
 298         if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
 299                 goto error_exit;
 300 #endif
 301         cfg->dnstap_bidirectional = 1;
 302         cfg->dnstap_tls = 1;
 303         cfg->disable_dnssec_lame_check = 0;
 304         cfg->ip_ratelimit = 0;
 305         cfg->ratelimit = 0;
 306         cfg->ip_ratelimit_slabs = 4;
 307         cfg->ratelimit_slabs = 4;
 308         cfg->ip_ratelimit_size = 4*1024*1024;
 309         cfg->ratelimit_size = 4*1024*1024;
 310         cfg->ratelimit_for_domain = NULL;
 311         cfg->ratelimit_below_domain = NULL;
 312         cfg->ip_ratelimit_factor = 10;
 313         cfg->ratelimit_factor = 10;
 314         cfg->qname_minimisation = 1;
 315         cfg->qname_minimisation_strict = 0;
 316         cfg->shm_enable = 0;
 317         cfg->shm_key = 11777;
 318         cfg->dnscrypt = 0;
 319         cfg->dnscrypt_port = 0;
 320         cfg->dnscrypt_provider = NULL;
 321         cfg->dnscrypt_provider_cert = NULL;
 322         cfg->dnscrypt_provider_cert_rotated = NULL;
 323         cfg->dnscrypt_secret_key = NULL;
 324         cfg->dnscrypt_shared_secret_cache_size = 4*1024*1024;
 325         cfg->dnscrypt_shared_secret_cache_slabs = 4;
 326         cfg->dnscrypt_nonce_cache_size = 4*1024*1024;
 327         cfg->dnscrypt_nonce_cache_slabs = 4;
 328 #ifdef USE_IPSECMOD
 329         cfg->ipsecmod_enabled = 1;
 330         cfg->ipsecmod_ignore_bogus = 0;
 331         cfg->ipsecmod_hook = NULL;
 332         cfg->ipsecmod_max_ttl = 3600;
 333         cfg->ipsecmod_whitelist = NULL;
 334         cfg->ipsecmod_strict = 0;
 335 #endif
 336 #ifdef USE_CACHEDB
 337         if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit;
 338         if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit;
 339 #ifdef USE_REDIS
 340         if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit;
 341         cfg->redis_timeout = 100;
 342         cfg->redis_server_port = 6379;
 343         cfg->redis_expire_records = 0;
 344 #endif  /* USE_REDIS */
 345 #endif  /* USE_CACHEDB */
 346 #ifdef USE_IPSET
 347         cfg->ipset_name_v4 = NULL;
 348         cfg->ipset_name_v6 = NULL;
 349 #endif
 350         return cfg;
 351 error_exit:
 352         config_delete(cfg);
 353         return NULL;
 354 }
 355
 356 struct config_file* config_create_forlib(void)
 357 {
 358         struct config_file* cfg = config_create();
 359         if(!cfg) return NULL;
 360         /* modifications for library use, less verbose, less memory */
 361         free(cfg->chrootdir);
 362         cfg->chrootdir = NULL;
 363         cfg->verbosity = 0;
 364         cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable'
 365                 and probably within the ulimit(maxfds) of the user */
 366         cfg->outgoing_num_tcp = 2;
 367         cfg->msg_cache_size = 1024*1024;
 368         cfg->msg_cache_slabs = 1;
 369         cfg->rrset_cache_size = 1024*1024;
 370         cfg->rrset_cache_slabs = 1;
 371         cfg->infra_cache_slabs = 1;
 372         cfg->use_syslog = 0;
 373         cfg->key_cache_size = 1024*1024;
 374         cfg->key_cache_slabs = 1;
 375         cfg->neg_cache_size = 100 * 1024;
 376         cfg->donotquery_localhost = 0; /* allow, so that you can ask a
 377                 forward nameserver running on localhost */
 378         cfg->val_log_level = 2; /* to fill why_bogus with */
 379         cfg->val_log_squelch = 1;
 380         cfg->minimal_responses = 0;
 381         return cfg;
 382 }
 383
 384 /** check that the value passed is >= 0 */
 385 #define IS_NUMBER_OR_ZERO \
 386         if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0
 387 /** check that the value passed is > 0 */
 388 #define IS_NONZERO_NUMBER \
 389         if(atoi(val) == 0) return 0
 390 /** check that the value passed is not 0 and a power of 2 */
 391 #define IS_POW2_NUMBER \
 392         if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0
 393 /** check that the value passed is yes or no */
 394 #define IS_YES_OR_NO \
 395         if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0
 396 /** put integer_or_zero into variable */
 397 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 398         { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); }
 399 /** put integer_nonzero into variable */
 400 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 401         { IS_NONZERO_NUMBER; cfg->var = atoi(val); }
 402 /** put integer_or_zero into unsigned */
 403 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 404         { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); }
 405 /** put integer_or_zero into size_t */
 406 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 407         { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); }
 408 /** put integer_nonzero into size_t */
 409 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 410         { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); }
 411 /** put yesno into variable */
 412 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \
 413         { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); }
 414 /** put memsize into variable */
 415 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \
 416         { return cfg_parse_memsize(val, &cfg->var); }
 417 /** put pow2 number into variable */
 418 #define S_POW2(str, var) if(strcmp(opt, str)==0) \
 419         { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); }
 420 /** put string into variable */
 421 #define S_STR(str, var) if(strcmp(opt, str)==0) \
 422         { free(cfg->var); return (cfg->var = strdup(val)) != NULL; }
 423 /** put string into strlist */
 424 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \
 425         { return cfg_strlist_insert(&cfg->var, strdup(val)); }
 426 /** put string into strlist if not present yet*/
 427 #define S_STRLIST_UNIQ(str, var) if(strcmp(opt, str)==0) \
 428         { if(cfg_strlist_find(cfg->var, val)) { return 0;} \
 429           return cfg_strlist_insert(&cfg->var, strdup(val)); }
 430 /** append string to strlist */
 431 #define S_STRLIST_APPEND(str, var) if(strcmp(opt, str)==0) \
 432         { return cfg_strlist_append(&cfg->var, strdup(val)); }
 433
 434 int config_set_option(struct config_file* cfg, const char* opt,
 435         const char* val)
 436 {
 437         char buf[64];
 438         if(!opt) return 0;
 439         if(opt[strlen(opt)-1] != ':' && strlen(opt)+2<sizeof(buf)) {
 440                 snprintf(buf, sizeof(buf), "%s:", opt);
 441                 opt = buf;
 442         }
 443         S_NUMBER_OR_ZERO("verbosity:", verbosity)
 444         else if(strcmp(opt, "statistics-interval:") == 0) {
 445                 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
 446                         cfg->stat_interval = 0;
 447                 else if(atoi(val) == 0)
 448                         return 0;
 449                 else cfg->stat_interval = atoi(val);
 450         } else if(strcmp(opt, "num_threads:") == 0) {
 451                 /* not supported, library must have 1 thread in bgworker */
 452                 return 0;
 453         } else if(strcmp(opt, "outgoing-port-permit:") == 0) {
 454                 return cfg_mark_ports(val, 1,
 455                         cfg->outgoing_avail_ports, 65536);
 456         } else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
 457                 return cfg_mark_ports(val, 0,
 458                         cfg->outgoing_avail_ports, 65536);
 459         } else if(strcmp(opt, "local-zone:") == 0) {
 460                 return cfg_parse_local_zone(cfg, val);
 461         } else if(strcmp(opt, "val-override-date:") == 0) {
 462                 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) {
 463                         cfg->val_date_override = 0;
 464                 } else if(strlen(val) == 14) {
 465                         cfg->val_date_override = cfg_convert_timeval(val);
 466                         return cfg->val_date_override != 0;
 467                 } else {
 468                         if(atoi(val) == 0) return 0;
 469                         cfg->val_date_override = (uint32_t)atoi(val);
 470                 }
 471         } else if(strcmp(opt, "local-data-ptr:") == 0) {
 472                 char* ptr = cfg_ptr_reverse((char*)opt);
 473                 return cfg_strlist_insert(&cfg->local_data, ptr);
 474         } else if(strcmp(opt, "logfile:") == 0) {
 475                 cfg->use_syslog = 0;
 476                 free(cfg->logfile);
 477                 return (cfg->logfile = strdup(val)) != NULL;
 478         }
 479         else if(strcmp(opt, "log-time-ascii:") == 0)
 480         { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0);
 481           log_set_time_asc(cfg->log_time_ascii); }
 482         else S_SIZET_NONZERO("max-udp-size:", max_udp_size)
 483         else S_YNO("use-syslog:", use_syslog)
 484         else S_STR("log-identity:", log_identity)
 485         else S_YNO("extended-statistics:", stat_extended)
 486         else S_YNO("statistics-cumulative:", stat_cumulative)
 487         else S_YNO("shm-enable:", shm_enable)
 488         else S_NUMBER_OR_ZERO("shm-key:", shm_key)
 489         else S_YNO("do-ip4:", do_ip4)
 490         else S_YNO("do-ip6:", do_ip6)
 491         else S_YNO("do-udp:", do_udp)
 492         else S_YNO("do-tcp:", do_tcp)
 493         else S_YNO("tcp-upstream:", tcp_upstream)
 494         else S_YNO("udp-upstream-without-downstream:",
 495                 udp_upstream_without_downstream)
 496         else S_NUMBER_NONZERO("tcp-mss:", tcp_mss)
 497         else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss)
 498         else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout)
 499         else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive)
 500         else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout)
 501         else S_YNO("ssl-upstream:", ssl_upstream)
 502         else S_STR("ssl-service-key:", ssl_service_key)
 503         else S_STR("ssl-service-pem:", ssl_service_pem)
 504         else S_NUMBER_NONZERO("ssl-port:", ssl_port)
 505         else S_STR("tls-cert-bundle:", tls_cert_bundle)
 506         else S_YNO("tls-win-cert:", tls_win_cert)
 507         else S_STRLIST("additional-tls-port:", tls_additional_port)
 508         else S_STRLIST("tls-additional-ports:", tls_additional_port)
 509         else S_STRLIST("tls-additional-port:", tls_additional_port)
 510         else S_STRLIST_APPEND("tls-session-ticket-keys:", tls_session_ticket_keys)
 511         else S_STR("tls-ciphers:", tls_ciphers)
 512         else S_STR("tls-ciphersuites:", tls_ciphersuites)
 513         else S_YNO("tls-use-sni:", tls_use_sni)
 514         else S_YNO("interface-automatic:", if_automatic)
 515         else S_YNO("use-systemd:", use_systemd)
 516         else S_YNO("do-daemonize:", do_daemonize)
 517         else S_NUMBER_NONZERO("port:", port)
 518         else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports)
 519         else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp)
 520         else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp)
 521         else S_MEMSIZE("stream-wait-size:", stream_wait_size)
 522         else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size)
 523         else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size)
 524         else S_MEMSIZE("msg-cache-size:", msg_cache_size)
 525         else S_POW2("msg-cache-slabs:", msg_cache_slabs)
 526         else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread)
 527         else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time)
 528         else S_MEMSIZE("so-rcvbuf:", so_rcvbuf)
 529         else S_MEMSIZE("so-sndbuf:", so_sndbuf)
 530         else S_YNO("so-reuseport:", so_reuseport)
 531         else S_YNO("ip-transparent:", ip_transparent)
 532         else S_YNO("ip-freebind:", ip_freebind)
 533         else S_NUMBER_OR_ZERO("ip-dscp:", ip_dscp)
 534         else S_MEMSIZE("rrset-cache-size:", rrset_cache_size)
 535         else S_POW2("rrset-cache-slabs:", rrset_cache_slabs)
 536         else S_YNO("prefetch:", prefetch)
 537         else S_YNO("prefetch-key:", prefetch_key)
 538         else S_YNO("deny-any:", deny_any)
 539         else if(strcmp(opt, "cache-max-ttl:") == 0)
 540         { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
 541         else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
 542         { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
 543         else if(strcmp(opt, "cache-min-ttl:") == 0)
 544         { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
 545         else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
 546             IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val);
 547             RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt;
 548         }
 549         else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl)
 550         else S_POW2("infra-cache-slabs:", infra_cache_slabs)
 551         else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts)
 552         else S_NUMBER_OR_ZERO("delay-close:", delay_close)
 553         else S_STR("chroot:", chrootdir)
 554         else S_STR("username:", username)
 555         else S_STR("directory:", directory)
 556         else S_STR("pidfile:", pidfile)
 557         else S_YNO("hide-identity:", hide_identity)
 558         else S_YNO("hide-version:", hide_version)
 559         else S_YNO("hide-trustanchor:", hide_trustanchor)
 560         else S_STR("identity:", identity)
 561         else S_STR("version:", version)
 562         else S_STRLIST("root-hints:", root_hints)
 563         else S_STR("target-fetch-policy:", target_fetch_policy)
 564         else S_YNO("harden-glue:", harden_glue)
 565         else S_YNO("harden-short-bufsize:", harden_short_bufsize)
 566         else S_YNO("harden-large-queries:", harden_large_queries)
 567         else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
 568         else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
 569         else S_YNO("harden-referral-path:", harden_referral_path)
 570         else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
 571         else S_YNO("use-caps-for-id:", use_caps_bits_for_id)
 572         else S_STRLIST("caps-whitelist:", caps_whitelist)
 573         else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
 574         else S_STRLIST("private-address:", private_address)
 575         else S_STRLIST("private-domain:", private_domain)
 576         else S_YNO("do-not-query-localhost:", donotquery_localhost)
 577         else S_STRLIST("do-not-query-address:", donotqueryaddrs)
 578         else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list)
 579         else S_STRLIST("trust-anchor-file:", trust_anchor_file_list)
 580         else S_STRLIST("trust-anchor:", trust_anchor_list)
 581         else S_STRLIST("trusted-keys-file:", trusted_keys_file_list)
 582         else S_YNO("trust-anchor-signaling:", trust_anchor_signaling)
 583         else S_YNO("root-key-sentinel:", root_key_sentinel)
 584         else S_STR("dlv-anchor-file:", dlv_anchor_file)
 585         else S_STRLIST("dlv-anchor:", dlv_anchor_list)
 586         else S_STRLIST("domain-insecure:", domain_insecure)
 587         else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl)
 588         else S_YNO("val-clean-additional:", val_clean_additional)
 589         else S_NUMBER_OR_ZERO("val-log-level:", val_log_level)
 590         else S_YNO("val-log-squelch:", val_log_squelch)
 591         else S_YNO("log-queries:", log_queries)
 592         else S_YNO("log-replies:", log_replies)
 593         else S_YNO("log-tag-queryreply:", log_tag_queryreply)
 594         else S_YNO("log-local-actions:", log_local_actions)
 595         else S_YNO("log-servfail:", log_servfail)
 596         else S_YNO("val-permissive-mode:", val_permissive_mode)
 597         else S_YNO("aggressive-nsec:", aggressive_nsec)
 598         else S_YNO("ignore-cd-flag:", ignore_cd)
 599         else if(strcmp(opt, "serve-expired:") == 0)
 600         { IS_YES_OR_NO; cfg->serve_expired = (strcmp(val, "yes") == 0);
 601           SERVE_EXPIRED = cfg->serve_expired; }
 602         else if(strcmp(opt, "serve-expired-ttl:") == 0)
 603         { IS_NUMBER_OR_ZERO; cfg->serve_expired_ttl = atoi(val); SERVE_EXPIRED_TTL=(time_t)cfg->serve_expired_ttl;}
 604         else S_YNO("serve-expired-ttl-reset:", serve_expired_ttl_reset)
 605         else if(strcmp(opt, "serve-expired-reply-ttl:") == 0)
 606         { IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;}
 607         else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout)
 608         else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
 609         else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown)
 610         else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown)
 611         else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing)
 612         else if(strcmp(opt, "permit-small-holddown:") == 0)
 613         { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0);
 614           autr_permit_small_holddown = cfg->permit_small_holddown; }
 615         else S_MEMSIZE("key-cache-size:", key_cache_size)
 616         else S_POW2("key-cache-slabs:", key_cache_slabs)
 617         else S_MEMSIZE("neg-cache-size:", neg_cache_size)
 618         else S_YNO("minimal-responses:", minimal_responses)
 619         else S_YNO("rrset-roundrobin:", rrset_roundrobin)
 620         else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit)
 621         else S_STRLIST("local-data:", local_data)
 622         else S_YNO("unblock-lan-zones:", unblock_lan_zones)
 623         else S_YNO("insecure-lan-zones:", insecure_lan_zones)
 624         else S_YNO("control-enable:", remote_control_enable)
 625         else S_STRLIST_APPEND("control-interface:", control_ifs)
 626         else S_NUMBER_NONZERO("control-port:", control_port)
 627         else S_STR("server-key-file:", server_key_file)
 628         else S_STR("server-cert-file:", server_cert_file)
 629         else S_STR("control-key-file:", control_key_file)
 630         else S_STR("control-cert-file:", control_cert_file)
 631         else S_STR("module-config:", module_conf)
 632         else S_STRLIST("python-script:", python_script)
 633         else S_STRLIST("dynlib-file:", dynlib_file)
 634         else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check)
 635 #ifdef CLIENT_SUBNET
 636         /* Can't set max subnet prefix here, since that value is used when
 637          * generating the address tree. */
 638         /* No client-subnet-always-forward here, module registration depends on
 639          * this option. */
 640 #endif
 641 #ifdef USE_DNSTAP
 642         else S_YNO("dnstap-enable:", dnstap)
 643         else S_YNO("dnstap-bidirectional:", dnstap_bidirectional)
 644         else S_STR("dnstap-socket-path:", dnstap_socket_path)
 645         else S_STR("dnstap-ip:", dnstap_ip)
 646         else S_YNO("dnstap-tls:", dnstap_tls)
 647         else S_STR("dnstap-tls-server-name:", dnstap_tls_server_name)
 648         else S_STR("dnstap-tls-cert-bundle:", dnstap_tls_cert_bundle)
 649         else S_STR("dnstap-tls-client-key-file:", dnstap_tls_client_key_file)
 650         else S_STR("dnstap-tls-client-cert-file:",
 651                 dnstap_tls_client_cert_file)
 652         else S_YNO("dnstap-send-identity:", dnstap_send_identity)
 653         else S_YNO("dnstap-send-version:", dnstap_send_version)
 654         else S_STR("dnstap-identity:", dnstap_identity)
 655         else S_STR("dnstap-version:", dnstap_version)
 656         else S_YNO("dnstap-log-resolver-query-messages:",
 657                 dnstap_log_resolver_query_messages)
 658         else S_YNO("dnstap-log-resolver-response-messages:",
 659                 dnstap_log_resolver_response_messages)
 660         else S_YNO("dnstap-log-client-query-messages:",
 661                 dnstap_log_client_query_messages)
 662         else S_YNO("dnstap-log-client-response-messages:",
 663                 dnstap_log_client_response_messages)
 664         else S_YNO("dnstap-log-forwarder-query-messages:",
 665                 dnstap_log_forwarder_query_messages)
 666         else S_YNO("dnstap-log-forwarder-response-messages:",
 667                 dnstap_log_forwarder_response_messages)
 668 #endif
 669 #ifdef USE_DNSCRYPT
 670         else S_YNO("dnscrypt-enable:", dnscrypt)
 671         else S_NUMBER_NONZERO("dnscrypt-port:", dnscrypt_port)
 672         else S_STR("dnscrypt-provider:", dnscrypt_provider)
 673         else S_STRLIST_UNIQ("dnscrypt-provider-cert:", dnscrypt_provider_cert)
 674         else S_STRLIST("dnscrypt-provider-cert-rotated:", dnscrypt_provider_cert_rotated)
 675         else S_STRLIST_UNIQ("dnscrypt-secret-key:", dnscrypt_secret_key)
 676         else S_MEMSIZE("dnscrypt-shared-secret-cache-size:",
 677                 dnscrypt_shared_secret_cache_size)
 678         else S_POW2("dnscrypt-shared-secret-cache-slabs:",
 679                 dnscrypt_shared_secret_cache_slabs)
 680         else S_MEMSIZE("dnscrypt-nonce-cache-size:",
 681                 dnscrypt_nonce_cache_size)
 682         else S_POW2("dnscrypt-nonce-cache-slabs:",
 683                 dnscrypt_nonce_cache_slabs)
 684 #endif
 685         else if(strcmp(opt, "ip-ratelimit:") == 0) {
 686             IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val);
 687             infra_ip_ratelimit=cfg->ip_ratelimit;
 688         }
 689         else if(strcmp(opt, "ratelimit:") == 0) {
 690             IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val);
 691             infra_dp_ratelimit=cfg->ratelimit;
 692         }
 693         else S_MEMSIZE("ip-ratelimit-size:", ip_ratelimit_size)
 694         else S_MEMSIZE("ratelimit-size:", ratelimit_size)
 695         else S_POW2("ip-ratelimit-slabs:", ip_ratelimit_slabs)
 696         else S_POW2("ratelimit-slabs:", ratelimit_slabs)
 697         else S_NUMBER_OR_ZERO("ip-ratelimit-factor:", ip_ratelimit_factor)
 698         else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor)
 699         else S_SIZET_NONZERO("fast-server-num:", fast_server_num)
 700         else S_NUMBER_OR_ZERO("fast-server-permil:", fast_server_permil)
 701         else S_YNO("qname-minimisation:", qname_minimisation)
 702         else S_YNO("qname-minimisation-strict:", qname_minimisation_strict)
 703 #ifdef USE_IPSECMOD
 704         else S_YNO("ipsecmod-enabled:", ipsecmod_enabled)
 705         else S_YNO("ipsecmod-ignore-bogus:", ipsecmod_ignore_bogus)
 706         else if(strcmp(opt, "ipsecmod-max-ttl:") == 0)
 707         { IS_NUMBER_OR_ZERO; cfg->ipsecmod_max_ttl = atoi(val); }
 708         else S_YNO("ipsecmod-strict:", ipsecmod_strict)
 709 #endif
 710         else if(strcmp(opt, "define-tag:") ==0) {
 711                 return config_add_tag(cfg, val);
 712         /* val_sig_skew_min and max are copied into val_env during init,
 713          * so this does not update val_env with set_option */
 714         } else if(strcmp(opt, "val-sig-skew-min:") == 0)
 715         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); }
 716         else if(strcmp(opt, "val-sig-skew-max:") == 0)
 717         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); }
 718         else if (strcmp(opt, "outgoing-interface:") == 0) {
 719                 char* d = strdup(val);
 720                 char** oi =
 721                 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
 722                 if(!d || !oi) { free(d); free(oi); return -1; }
 723                 if(cfg->out_ifs && cfg->num_out_ifs) {
 724                         memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*));
 725                         free(cfg->out_ifs);
 726                 }
 727                 oi[cfg->num_out_ifs++] = d;
 728                 cfg->out_ifs = oi;
 729         } else {
 730                 /* unknown or unsupported (from the set_option interface):
 731                  * interface, outgoing-interface, access-control,
 732                  * stub-zone, name, stub-addr, stub-host, stub-prime
 733                  * forward-first, stub-first, forward-ssl-upstream,
 734                  * stub-ssl-upstream, forward-zone, auth-zone
 735                  * name, forward-addr, forward-host,
 736                  * ratelimit-for-domain, ratelimit-below-domain,
 737                  * local-zone-tag, access-control-view,
 738                  * send-client-subnet, client-subnet-always-forward,
 739                  * max-client-subnet-ipv4, max-client-subnet-ipv6,
 740                  * min-client-subnet-ipv4, min-client-subnet-ipv6,
 741                  * max-ecs-tree-size-ipv4, max-ecs-tree-size-ipv6, ipsecmod_hook,
 742                  * ipsecmod_whitelist. */
 743                 return 0;
 744         }
 745         return 1;
 746 }
 747
 748 void config_print_func(char* line, void* arg)
 749 {
 750         FILE* f = (FILE*)arg;
 751         (void)fprintf(f, "%s\n", line);
 752 }
 753
 754 /** collate func arg */
 755 struct config_collate_arg {
 756         /** list of result items */
 757         struct config_strlist_head list;
 758         /** if a malloc error occurred, 0 is OK */
 759         int status;
 760 };
 761
 762 void config_collate_func(char* line, void* arg)
 763 {
 764         struct config_collate_arg* m = (struct config_collate_arg*)arg;
 765         if(m->status)
 766                 return;
 767         if(!cfg_strlist_append(&m->list, strdup(line)))
 768                 m->status = 1;
 769 }
 770
 771 int config_get_option_list(struct config_file* cfg, const char* opt,
 772         struct config_strlist** list)
 773 {
 774         struct config_collate_arg m;
 775         memset(&m, 0, sizeof(m));
 776         *list = NULL;
 777         if(!config_get_option(cfg, opt, config_collate_func, &m))
 778                 return 1;
 779         if(m.status) {
 780                 config_delstrlist(m.list.first);
 781                 return 2;
 782         }
 783         *list = m.list.first;
 784         return 0;
 785 }
 786
 787 int
 788 config_get_option_collate(struct config_file* cfg, const char* opt, char** str)
 789 {
 790         struct config_strlist* list = NULL;
 791         int r;
 792         *str = NULL;
 793         if((r = config_get_option_list(cfg, opt, &list)) != 0)
 794                 return r;
 795         *str = config_collate_cat(list);
 796         config_delstrlist(list);
 797         if(!*str) return 2;
 798         return 0;
 799 }
 800
 801 char*
 802 config_collate_cat(struct config_strlist* list)
 803 {
 804         size_t total = 0, left;
 805         struct config_strlist* s;
 806         char *r, *w;
 807         if(!list) /* no elements */
 808                 return strdup("");
 809         if(list->next == NULL) /* one element , no newline at end. */
 810                 return strdup(list->str);
 811         /* count total length */
 812         for(s=list; s; s=s->next)
 813                 total += strlen(s->str) + 1; /* len + newline */
 814         left = total+1; /* one extra for nul at end */
 815         r = malloc(left);
 816         if(!r)
 817                 return NULL;
 818         w = r;
 819         for(s=list; s; s=s->next) {
 820                 size_t this = strlen(s->str);
 821                 if(this+2 > left) { /* sanity check */
 822                         free(r);
 823                         return NULL;
 824                 }
 825                 snprintf(w, left, "%s\n", s->str);
 826                 this = strlen(w);
 827                 w += this;
 828                 left -= this;
 829         }
 830         return r;
 831 }
 832
 833 /** compare and print decimal option */
 834 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \
 835         {snprintf(buf, len, "%d", (int)cfg->var); \
 836         func(buf, arg);}
 837 /** compare and print unsigned option */
 838 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \
 839         {snprintf(buf, len, "%u", (unsigned)cfg->var); \
 840         func(buf, arg);}
 841 /** compare and print yesno option */
 842 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \
 843         {func(cfg->var?"yes":"no", arg);}
 844 /** compare and print string option */
 845 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \
 846         {func(cfg->var?cfg->var:"", arg);}
 847 /** compare and print array option */
 848 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \
 849         {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);}
 850 /** compare and print memorysize option */
 851 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \
 852         if(cfg->var > 1024*1024*1024) { \
 853           size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \
 854           snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \
 855         } else snprintf(buf, len, "%u", (unsigned)cfg->var); \
 856         func(buf, arg);}
 857 /** compare and print list option */
 858 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \
 859         struct config_strlist* p = cfg->lst; \
 860         for(p = cfg->lst; p; p = p->next) \
 861                 func(p->str, arg); \
 862         }
 863 /** compare and print list option */
 864 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \
 865         struct config_str2list* p = cfg->lst; \
 866         for(p = cfg->lst; p; p = p->next) { \
 867                 snprintf(buf, len, "%s %s", p->str, p->str2); \
 868                 func(buf, arg); \
 869         } \
 870         }
 871 /** compare and print list option */
 872 #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \
 873         struct config_str3list* p = cfg->lst; \
 874         for(p = cfg->lst; p; p = p->next) { \
 875                 snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \
 876                 func(buf, arg); \
 877         } \
 878         }
 879 /** compare and print taglist option */
 880 #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \
 881         char* tmpstr = NULL; \
 882         struct config_strbytelist *p = cfg->lst; \
 883         for(p = cfg->lst; p; p = p->next) {\
 884                 tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \
 885                 if(tmpstr) {\
 886                         snprintf(buf, len, "%s %s", p->str, tmpstr); \
 887                         func(buf, arg); \
 888                         free(tmpstr); \
 889                 } \
 890         } \
 891         }
 892
 893 int
 894 config_get_option(struct config_file* cfg, const char* opt,
 895         void (*func)(char*,void*), void* arg)
 896 {
 897         char buf[1024], nopt[64];
 898         size_t len = sizeof(buf);
 899         if(!opt) return 0;
 900         if(opt && opt[strlen(opt)-1] == ':' && strlen(opt)<sizeof(nopt)) {
 901                 memmove(nopt, opt, strlen(opt));
 902                 nopt[strlen(opt)-1] = 0;
 903                 opt = nopt;
 904         }
 905         fptr_ok(fptr_whitelist_print_func(func));
 906         O_DEC(opt, "verbosity", verbosity)
 907         else O_DEC(opt, "statistics-interval", stat_interval)
 908         else O_YNO(opt, "statistics-cumulative", stat_cumulative)
 909         else O_YNO(opt, "extended-statistics", stat_extended)
 910         else O_YNO(opt, "shm-enable", shm_enable)
 911         else O_DEC(opt, "shm-key", shm_key)
 912         else O_YNO(opt, "use-syslog", use_syslog)
 913         else O_STR(opt, "log-identity", log_identity)
 914         else O_YNO(opt, "log-time-ascii", log_time_ascii)
 915         else O_DEC(opt, "num-threads", num_threads)
 916         else O_IFC(opt, "interface", num_ifs, ifs)
 917         else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
 918         else O_YNO(opt, "interface-automatic", if_automatic)
 919         else O_DEC(opt, "port", port)
 920         else O_DEC(opt, "outgoing-range", outgoing_num_ports)
 921         else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
 922         else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
 923         else O_MEM(opt, "stream-wait-size", stream_wait_size)
 924         else O_DEC(opt, "edns-buffer-size", edns_buffer_size)
 925         else O_DEC(opt, "msg-buffer-size", msg_buffer_size)
 926         else O_MEM(opt, "msg-cache-size", msg_cache_size)
 927         else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs)
 928         else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread)
 929         else O_UNS(opt, "jostle-timeout", jostle_time)
 930         else O_MEM(opt, "so-rcvbuf", so_rcvbuf)
 931         else O_MEM(opt, "so-sndbuf", so_sndbuf)
 932         else O_YNO(opt, "so-reuseport", so_reuseport)
 933         else O_YNO(opt, "ip-transparent", ip_transparent)
 934         else O_YNO(opt, "ip-freebind", ip_freebind)
 935         else O_DEC(opt, "ip-dscp", ip_dscp)
 936         else O_MEM(opt, "rrset-cache-size", rrset_cache_size)
 937         else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs)
 938         else O_YNO(opt, "prefetch-key", prefetch_key)
 939         else O_YNO(opt, "prefetch", prefetch)
 940         else O_YNO(opt, "deny-any", deny_any)
 941         else O_DEC(opt, "cache-max-ttl", max_ttl)
 942         else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
 943         else O_DEC(opt, "cache-min-ttl", min_ttl)
 944         else O_DEC(opt, "infra-host-ttl", host_ttl)
 945         else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
 946         else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt)
 947         else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts)
 948         else O_UNS(opt, "delay-close", delay_close)
 949         else O_YNO(opt, "do-ip4", do_ip4)
 950         else O_YNO(opt, "do-ip6", do_ip6)
 951         else O_YNO(opt, "do-udp", do_udp)
 952         else O_YNO(opt, "do-tcp", do_tcp)
 953         else O_YNO(opt, "tcp-upstream", tcp_upstream)
 954         else O_YNO(opt, "udp-upstream-without-downstream", udp_upstream_without_downstream)
 955         else O_DEC(opt, "tcp-mss", tcp_mss)
 956         else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss)
 957         else O_DEC(opt, "tcp-idle-timeout", tcp_idle_timeout)
 958         else O_YNO(opt, "edns-tcp-keepalive", do_tcp_keepalive)
 959         else O_DEC(opt, "edns-tcp-keepalive-timeout", tcp_keepalive_timeout)
 960         else O_YNO(opt, "ssl-upstream", ssl_upstream)
 961         else O_STR(opt, "ssl-service-key", ssl_service_key)
 962         else O_STR(opt, "ssl-service-pem", ssl_service_pem)
 963         else O_DEC(opt, "ssl-port", ssl_port)
 964         else O_STR(opt, "tls-cert-bundle", tls_cert_bundle)
 965         else O_YNO(opt, "tls-win-cert", tls_win_cert)
 966         else O_LST(opt, "tls-additional-port", tls_additional_port)
 967         else O_LST(opt, "tls-session-ticket-keys", tls_session_ticket_keys.first)
 968         else O_STR(opt, "tls-ciphers", tls_ciphers)
 969         else O_STR(opt, "tls-ciphersuites", tls_ciphersuites)
 970         else O_YNO(opt, "tls-use-sni", tls_use_sni)
 971         else O_YNO(opt, "use-systemd", use_systemd)
 972         else O_YNO(opt, "do-daemonize", do_daemonize)
 973         else O_STR(opt, "chroot", chrootdir)
 974         else O_STR(opt, "username", username)
 975         else O_STR(opt, "directory", directory)
 976         else O_STR(opt, "logfile", logfile)
 977         else O_YNO(opt, "log-queries", log_queries)
 978         else O_YNO(opt, "log-replies", log_replies)
 979         else O_YNO(opt, "log-tag-queryreply", log_tag_queryreply)
 980         else O_YNO(opt, "log-local-actions", log_local_actions)
 981         else O_YNO(opt, "log-servfail", log_servfail)
 982         else O_STR(opt, "pidfile", pidfile)
 983         else O_YNO(opt, "hide-identity", hide_identity)
 984         else O_YNO(opt, "hide-version", hide_version)
 985         else O_YNO(opt, "hide-trustanchor", hide_trustanchor)
 986         else O_STR(opt, "identity", identity)
 987         else O_STR(opt, "version", version)
 988         else O_STR(opt, "target-fetch-policy", target_fetch_policy)
 989         else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize)
 990         else O_YNO(opt, "harden-large-queries", harden_large_queries)
 991         else O_YNO(opt, "harden-glue", harden_glue)
 992         else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
 993         else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
 994         else O_YNO(opt, "harden-referral-path", harden_referral_path)
 995         else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
 996         else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
 997         else O_LST(opt, "caps-whitelist", caps_whitelist)
 998         else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
 999         else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)
1000         else O_STR(opt, "module-config", module_conf)
1001         else O_STR(opt, "dlv-anchor-file", dlv_anchor_file)
1002         else O_DEC(opt, "val-bogus-ttl", bogus_ttl)
1003         else O_YNO(opt, "val-clean-additional", val_clean_additional)
1004         else O_DEC(opt, "val-log-level", val_log_level)
1005         else O_YNO(opt, "val-permissive-mode", val_permissive_mode)
1006         else O_YNO(opt, "aggressive-nsec", aggressive_nsec)
1007         else O_YNO(opt, "ignore-cd-flag", ignore_cd)
1008         else O_YNO(opt, "serve-expired", serve_expired)
1009         else O_DEC(opt, "serve-expired-ttl", serve_expired_ttl)
1010         else O_YNO(opt, "serve-expired-ttl-reset", serve_expired_ttl_reset)
1011         else O_DEC(opt, "serve-expired-reply-ttl", serve_expired_reply_ttl)
1012         else O_DEC(opt, "serve-expired-client-timeout", serve_expired_client_timeout)
1013         else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations)
1014         else O_UNS(opt, "add-holddown", add_holddown)
1015         else O_UNS(opt, "del-holddown", del_holddown)
1016         else O_UNS(opt, "keep-missing", keep_missing)
1017         else O_YNO(opt, "permit-small-holddown", permit_small_holddown)
1018         else O_MEM(opt, "key-cache-size", key_cache_size)
1019         else O_DEC(opt, "key-cache-slabs", key_cache_slabs)
1020         else O_MEM(opt, "neg-cache-size", neg_cache_size)
1021         else O_YNO(opt, "control-enable", remote_control_enable)
1022         else O_DEC(opt, "control-port", control_port)
1023         else O_STR(opt, "server-key-file", server_key_file)
1024         else O_STR(opt, "server-cert-file", server_cert_file)
1025         else O_STR(opt, "control-key-file", control_key_file)
1026         else O_STR(opt, "control-cert-file", control_cert_file)
1027         else O_LST(opt, "root-hints", root_hints)
1028         else O_LS2(opt, "access-control", acls)
1029         else O_LS2(opt, "tcp-connection-limit", tcp_connection_limits)
1030         else O_LST(opt, "do-not-query-address", donotqueryaddrs)
1031         else O_LST(opt, "private-address", private_address)
1032         else O_LST(opt, "private-domain", private_domain)
1033         else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list)
1034         else O_LST(opt, "trust-anchor-file", trust_anchor_file_list)
1035         else O_LST(opt, "trust-anchor", trust_anchor_list)
1036         else O_LST(opt, "trusted-keys-file", trusted_keys_file_list)
1037         else O_YNO(opt, "trust-anchor-signaling", trust_anchor_signaling)
1038         else O_YNO(opt, "root-key-sentinel", root_key_sentinel)
1039         else O_LST(opt, "dlv-anchor", dlv_anchor_list)
1040         else O_LST(opt, "control-interface", control_ifs.first)
1041         else O_LST(opt, "domain-insecure", domain_insecure)
1042         else O_UNS(opt, "val-override-date", val_date_override)
1043         else O_YNO(opt, "minimal-responses", minimal_responses)
1044         else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
1045         else O_DEC(opt, "unknown-server-time-limit", unknown_server_time_limit)
1046 #ifdef CLIENT_SUBNET
1047         else O_LST(opt, "send-client-subnet", client_subnet)
1048         else O_LST(opt, "client-subnet-zone", client_subnet_zone)
1049         else O_DEC(opt, "max-client-subnet-ipv4", max_client_subnet_ipv4)
1050         else O_DEC(opt, "max-client-subnet-ipv6", max_client_subnet_ipv6)
1051         else O_DEC(opt, "min-client-subnet-ipv4", min_client_subnet_ipv4)
1052         else O_DEC(opt, "min-client-subnet-ipv6", min_client_subnet_ipv6)
1053         else O_DEC(opt, "max-ecs-tree-size-ipv4", max_ecs_tree_size_ipv4)
1054         else O_DEC(opt, "max-ecs-tree-size-ipv6", max_ecs_tree_size_ipv6)
1055         else O_YNO(opt, "client-subnet-always-forward:",
1056                 client_subnet_always_forward)
1057 #endif
1058 #ifdef USE_DNSTAP
1059         else O_YNO(opt, "dnstap-enable", dnstap)
1060         else O_YNO(opt, "dnstap-bidirectional", dnstap_bidirectional)
1061         else O_STR(opt, "dnstap-socket-path", dnstap_socket_path)
1062         else O_STR(opt, "dnstap-ip", dnstap_ip)
1063         else O_YNO(opt, "dnstap-tls", dnstap_tls)
1064         else O_STR(opt, "dnstap-tls-server-name", dnstap_tls_server_name)
1065         else O_STR(opt, "dnstap-tls-cert-bundle", dnstap_tls_cert_bundle)
1066         else O_STR(opt, "dnstap-tls-client-key-file",
1067                 dnstap_tls_client_key_file)
1068         else O_STR(opt, "dnstap-tls-client-cert-file",
1069                 dnstap_tls_client_cert_file)
1070         else O_YNO(opt, "dnstap-send-identity", dnstap_send_identity)
1071         else O_YNO(opt, "dnstap-send-version", dnstap_send_version)
1072         else O_STR(opt, "dnstap-identity", dnstap_identity)
1073         else O_STR(opt, "dnstap-version", dnstap_version)
1074         else O_YNO(opt, "dnstap-log-resolver-query-messages",
1075                 dnstap_log_resolver_query_messages)
1076         else O_YNO(opt, "dnstap-log-resolver-response-messages",
1077                 dnstap_log_resolver_response_messages)
1078         else O_YNO(opt, "dnstap-log-client-query-messages",
1079                 dnstap_log_client_query_messages)
1080         else O_YNO(opt, "dnstap-log-client-response-messages",
1081                 dnstap_log_client_response_messages)
1082         else O_YNO(opt, "dnstap-log-forwarder-query-messages",
1083                 dnstap_log_forwarder_query_messages)
1084         else O_YNO(opt, "dnstap-log-forwarder-response-messages",
1085                 dnstap_log_forwarder_response_messages)
1086 #endif
1087 #ifdef USE_DNSCRYPT
1088         else O_YNO(opt, "dnscrypt-enable", dnscrypt)
1089         else O_DEC(opt, "dnscrypt-port", dnscrypt_port)
1090         else O_STR(opt, "dnscrypt-provider", dnscrypt_provider)
1091         else O_LST(opt, "dnscrypt-provider-cert", dnscrypt_provider_cert)
1092         else O_LST(opt, "dnscrypt-provider-cert-rotated", dnscrypt_provider_cert_rotated)
1093         else O_LST(opt, "dnscrypt-secret-key", dnscrypt_secret_key)
1094         else O_MEM(opt, "dnscrypt-shared-secret-cache-size",
1095                 dnscrypt_shared_secret_cache_size)
1096         else O_DEC(opt, "dnscrypt-shared-secret-cache-slabs",
1097                 dnscrypt_shared_secret_cache_slabs)
1098         else O_MEM(opt, "dnscrypt-nonce-cache-size",
1099                 dnscrypt_nonce_cache_size)
1100         else O_DEC(opt, "dnscrypt-nonce-cache-slabs",
1101                 dnscrypt_nonce_cache_slabs)
1102 #endif
1103         else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones)
1104         else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones)
1105         else O_DEC(opt, "max-udp-size", max_udp_size)
1106         else O_LST(opt, "python-script", python_script)
1107         else O_LST(opt, "dynlib-file", dynlib_file)
1108         else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check)
1109         else O_DEC(opt, "ip-ratelimit", ip_ratelimit)
1110         else O_DEC(opt, "ratelimit", ratelimit)
1111         else O_MEM(opt, "ip-ratelimit-size", ip_ratelimit_size)
1112         else O_MEM(opt, "ratelimit-size", ratelimit_size)
1113         else O_DEC(opt, "ip-ratelimit-slabs", ip_ratelimit_slabs)
1114         else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs)
1115         else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain)
1116         else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain)
1117         else O_DEC(opt, "ip-ratelimit-factor", ip_ratelimit_factor)
1118         else O_DEC(opt, "ratelimit-factor", ratelimit_factor)
1119         else O_DEC(opt, "fast-server-num", fast_server_num)
1120         else O_DEC(opt, "fast-server-permil", fast_server_permil)
1121         else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min)
1122         else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max)
1123         else O_YNO(opt, "qname-minimisation", qname_minimisation)
1124         else O_YNO(opt, "qname-minimisation-strict", qname_minimisation_strict)
1125         else O_IFC(opt, "define-tag", num_tags, tagname)
1126         else O_LTG(opt, "local-zone-tag", local_zone_tags)
1127         else O_LTG(opt, "access-control-tag", acl_tags)
1128         else O_LTG(opt, "response-ip-tag", respip_tags)
1129         else O_LS3(opt, "local-zone-override", local_zone_overrides)
1130         else O_LS3(opt, "access-control-tag-action", acl_tag_actions)
1131         else O_LS3(opt, "access-control-tag-data", acl_tag_datas)
1132         else O_LS2(opt, "access-control-view", acl_view)
1133 #ifdef USE_IPSECMOD
1134         else O_YNO(opt, "ipsecmod-enabled", ipsecmod_enabled)
1135         else O_YNO(opt, "ipsecmod-ignore-bogus", ipsecmod_ignore_bogus)
1136         else O_STR(opt, "ipsecmod-hook", ipsecmod_hook)
1137         else O_DEC(opt, "ipsecmod-max-ttl", ipsecmod_max_ttl)
1138         else O_LST(opt, "ipsecmod-whitelist", ipsecmod_whitelist)
1139         else O_YNO(opt, "ipsecmod-strict", ipsecmod_strict)
1140 #endif
1141 #ifdef USE_CACHEDB
1142         else O_STR(opt, "backend", cachedb_backend)
1143         else O_STR(opt, "secret-seed", cachedb_secret)
1144 #ifdef USE_REDIS
1145         else O_STR(opt, "redis-server-host", redis_server_host)
1146         else O_DEC(opt, "redis-server-port", redis_server_port)
1147         else O_DEC(opt, "redis-timeout", redis_timeout)
1148         else O_YNO(opt, "redis-expire-records", redis_expire_records)
1149 #endif  /* USE_REDIS */
1150 #endif  /* USE_CACHEDB */
1151 #ifdef USE_IPSET
1152         else O_STR(opt, "name-v4", ipset_name_v4)
1153         else O_STR(opt, "name-v6", ipset_name_v6)
1154 #endif
1155         /* not here:
1156          * outgoing-permit, outgoing-avoid - have list of ports
1157          * local-zone - zones and nodefault variables
1158          * local-data - see below
1159          * local-data-ptr - converted to local-data entries
1160          * stub-zone, name, stub-addr, stub-host, stub-prime
1161          * forward-zone, name, forward-addr, forward-host
1162          */
1163         else return 0;
1164         return 1;
1165 }
1166
1167 /** initialize the global cfg_parser object */
1168 static void
1169 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
1170 {
1171         static struct config_parser_state st;
1172         cfg_parser = &st;
1173         cfg_parser->filename = filename;
1174         cfg_parser->line = 1;
1175         cfg_parser->errors = 0;
1176         cfg_parser->cfg = cfg;
1177         cfg_parser->chroot = chroot;
1178         init_cfg_parse();
1179 }
1180
1181 int
1182 config_read(struct config_file* cfg, const char* filename, const char* chroot)
1183 {
1184         FILE *in;
1185         char *fname = (char*)filename;
1186 #ifdef HAVE_GLOB
1187         glob_t g;
1188         size_t i;
1189         int r, flags;
1190 #endif
1191         if(!fname)
1192                 return 1;
1193
1194         /* check for wildcards */
1195 #ifdef HAVE_GLOB
1196         if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') &&
1197                 !strchr(fname, '{') && !strchr(fname, '~'))) {
1198                 verbose(VERB_QUERY, "wildcard found, processing %s", fname);
1199                 flags = 0
1200 #ifdef GLOB_ERR
1201                         | GLOB_ERR
1202 #endif
1203 #ifdef GLOB_NOSORT
1204                         | GLOB_NOSORT
1205 #endif
1206 #ifdef GLOB_BRACE
1207                         | GLOB_BRACE
1208 #endif
1209 #ifdef GLOB_TILDE
1210                         | GLOB_TILDE
1211 #endif
1212                 ;
1213                 memset(&g, 0, sizeof(g));
1214                 r = glob(fname, flags, NULL, &g);
1215                 if(r) {
1216                         /* some error */
1217                         globfree(&g);
1218                         if(r == GLOB_NOMATCH) {
1219                                 verbose(VERB_QUERY, "include: "
1220                                 "no matches for %s", fname);
1221                                 return 1;
1222                         } else if(r == GLOB_NOSPACE) {
1223                                 log_err("include: %s: "
1224                                         "fnametern out of memory", fname);
1225                         } else if(r == GLOB_ABORTED) {
1226                                 log_err("wildcard include: %s: expansion "
1227                                         "aborted (%s)", fname, strerror(errno));
1228                         } else {
1229                                 log_err("wildcard include: %s: expansion "
1230                                         "failed (%s)", fname, strerror(errno));
1231                         }
1232                         /* ignore globs that yield no files */
1233                         return 1;
1234                 }
1235                 /* process files found, if any */
1236                 for(i=0; i<(size_t)g.gl_pathc; i++) {
1237                         if(!config_read(cfg, g.gl_pathv[i], chroot)) {
1238                                 log_err("error reading wildcard "
1239                                         "include: %s", g.gl_pathv[i]);
1240                                 globfree(&g);
1241                                 return 0;
1242                         }
1243                 }
1244                 globfree(&g);
1245                 return 1;
1246         }
1247 #endif /* HAVE_GLOB */
1248
1249         in = fopen(fname, "r");
1250         if(!in) {
1251                 log_err("Could not open %s: %s", fname, strerror(errno));
1252                 return 0;
1253         }
1254         create_cfg_parser(cfg, fname, chroot);
1255         ub_c_in = in;
1256         ub_c_parse();
1257         fclose(in);
1258
1259         if(!cfg->dnscrypt) cfg->dnscrypt_port = 0;
1260
1261         if(cfg_parser->errors != 0) {
1262                 fprintf(stderr, "read %s failed: %d errors in configuration file\n",
1263                         fname, cfg_parser->errors);
1264                 errno=EINVAL;
1265                 return 0;
1266         }
1267
1268         return 1;
1269 }
1270
1271 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm)
1272 {
1273         struct config_stub* p = *(*pp);
1274         while(p) {
1275                 if(strcmp(p->name, nm) == 0)
1276                         return p;
1277                 (*pp) = &p->next;
1278                 p = p->next;
1279         }
1280         return NULL;
1281 }
1282
1283 void
1284 config_delstrlist(struct config_strlist* p)
1285 {
1286         struct config_strlist *np;
1287         while(p) {
1288                 np = p->next;
1289                 free(p->str);
1290                 free(p);
1291                 p = np;
1292         }
1293 }
1294
1295 void
1296 config_deldblstrlist(struct config_str2list* p)
1297 {
1298         struct config_str2list *np;
1299         while(p) {
1300                 np = p->next;
1301                 free(p->str);
1302                 free(p->str2);
1303                 free(p);
1304                 p = np;
1305         }
1306 }
1307
1308 void
1309 config_deltrplstrlist(struct config_str3list* p)
1310 {
1311         struct config_str3list *np;
1312         while(p) {
1313                 np = p->next;
1314                 free(p->str);
1315                 free(p->str2);
1316                 free(p->str3);
1317                 free(p);
1318                 p = np;
1319         }
1320 }
1321
1322 void
1323 config_delauth(struct config_auth* p)
1324 {
1325         if(!p) return;
1326         free(p->name);
1327         config_delstrlist(p->masters);
1328         config_delstrlist(p->urls);
1329         config_delstrlist(p->allow_notify);
1330         free(p->zonefile);
1331         free(p->rpz_taglist);
1332         free(p->rpz_action_override);
1333         free(p->rpz_cname);
1334         free(p->rpz_log_name);
1335         free(p);
1336 }
1337
1338 void
1339 config_delauths(struct config_auth* p)
1340 {
1341         struct config_auth* np;
1342         while(p) {
1343                 np = p->next;
1344                 config_delauth(p);
1345                 p = np;
1346         }
1347 }
1348
1349 void
1350 config_delstub(struct config_stub* p)
1351 {
1352         if(!p) return;
1353         free(p->name);
1354         config_delstrlist(p->hosts);
1355         config_delstrlist(p->addrs);
1356         free(p);
1357 }
1358
1359 void
1360 config_delstubs(struct config_stub* p)
1361 {
1362         struct config_stub* np;
1363         while(p) {
1364                 np = p->next;
1365                 config_delstub(p);
1366                 p = np;
1367         }
1368 }
1369
1370 void
1371 config_delview(struct config_view* p)
1372 {
1373         if(!p) return;
1374         free(p->name);
1375         config_deldblstrlist(p->local_zones);
1376         config_delstrlist(p->local_zones_nodefault);
1377 #ifdef USE_IPSET
1378         config_delstrlist(p->local_zones_ipset);
1379 #endif
1380         config_delstrlist(p->local_data);
1381         free(p);
1382 }
1383
1384 void
1385 config_delviews(struct config_view* p)
1386 {
1387         struct config_view* np;
1388         while(p) {
1389                 np = p->next;
1390                 config_delview(p);
1391                 p = np;
1392         }
1393 }
1394 /** delete string array */
1395 static void
1396 config_del_strarray(char** array, int num)
1397 {
1398         int i;
1399         if(!array)
1400                 return;
1401         for(i=0; i<num; i++) {
1402                 free(array[i]);
1403         }
1404         free(array);
1405 }
1406
1407 void
1408 config_del_strbytelist(struct config_strbytelist* p)
1409 {
1410         struct config_strbytelist* np;
1411         while(p) {
1412                 np = p->next;
1413                 free(p->str);
1414                 free(p->str2);
1415                 free(p);
1416                 p = np;
1417         }
1418 }
1419
1420 void
1421 config_delete(struct config_file* cfg)
1422 {
1423         if(!cfg) return;
1424         free(cfg->username);
1425         free(cfg->chrootdir);
1426         free(cfg->directory);
1427         free(cfg->logfile);
1428         free(cfg->pidfile);
1429         free(cfg->target_fetch_policy);
1430         free(cfg->ssl_service_key);
1431         free(cfg->ssl_service_pem);
1432         free(cfg->tls_cert_bundle);
1433         config_delstrlist(cfg->tls_additional_port);
1434         config_delstrlist(cfg->tls_session_ticket_keys.first);
1435         free(cfg->tls_ciphers);
1436         free(cfg->tls_ciphersuites);
1437         if(cfg->log_identity) {
1438                 log_ident_revert_to_default();
1439                 free(cfg->log_identity);
1440         }
1441         config_del_strarray(cfg->ifs, cfg->num_ifs);
1442         config_del_strarray(cfg->out_ifs, cfg->num_out_ifs);
1443         config_delstubs(cfg->stubs);
1444         config_delstubs(cfg->forwards);
1445         config_delauths(cfg->auths);
1446         config_delviews(cfg->views);
1447         config_delstrlist(cfg->donotqueryaddrs);
1448         config_delstrlist(cfg->root_hints);
1449 #ifdef CLIENT_SUBNET
1450         config_delstrlist(cfg->client_subnet);
1451         config_delstrlist(cfg->client_subnet_zone);
1452 #endif
1453         free(cfg->identity);
1454         free(cfg->version);
1455         free(cfg->module_conf);
1456         free(cfg->outgoing_avail_ports);
1457         config_delstrlist(cfg->caps_whitelist);
1458         config_delstrlist(cfg->private_address);
1459         config_delstrlist(cfg->private_domain);
1460         config_delstrlist(cfg->auto_trust_anchor_file_list);
1461         config_delstrlist(cfg->trust_anchor_file_list);
1462         config_delstrlist(cfg->trusted_keys_file_list);
1463         config_delstrlist(cfg->trust_anchor_list);
1464         config_delstrlist(cfg->domain_insecure);
1465         free(cfg->dlv_anchor_file);
1466         config_delstrlist(cfg->dlv_anchor_list);
1467         config_deldblstrlist(cfg->acls);
1468         config_deldblstrlist(cfg->tcp_connection_limits);
1469         free(cfg->val_nsec3_key_iterations);
1470         config_deldblstrlist(cfg->local_zones);
1471         config_delstrlist(cfg->local_zones_nodefault);
1472 #ifdef USE_IPSET
1473         config_delstrlist(cfg->local_zones_ipset);
1474 #endif
1475         config_delstrlist(cfg->local_data);
1476         config_deltrplstrlist(cfg->local_zone_overrides);
1477         config_del_strarray(cfg->tagname, cfg->num_tags);
1478         config_del_strbytelist(cfg->local_zone_tags);
1479         config_del_strbytelist(cfg->acl_tags);
1480         config_del_strbytelist(cfg->respip_tags);
1481         config_deltrplstrlist(cfg->acl_tag_actions);
1482         config_deltrplstrlist(cfg->acl_tag_datas);
1483         config_delstrlist(cfg->control_ifs.first);
1484         free(cfg->server_key_file);
1485         free(cfg->server_cert_file);
1486         free(cfg->control_key_file);
1487         free(cfg->control_cert_file);
1488         free(cfg->dns64_prefix);
1489         config_delstrlist(cfg->dns64_ignore_aaaa);
1490         free(cfg->dnstap_socket_path);
1491         free(cfg->dnstap_ip);
1492         free(cfg->dnstap_tls_server_name);
1493         free(cfg->dnstap_tls_cert_bundle);
1494         free(cfg->dnstap_tls_client_key_file);
1495         free(cfg->dnstap_tls_client_cert_file);
1496         free(cfg->dnstap_identity);
1497         free(cfg->dnstap_version);
1498         config_deldblstrlist(cfg->ratelimit_for_domain);
1499         config_deldblstrlist(cfg->ratelimit_below_domain);
1500         config_delstrlist(cfg->python_script);
1501         config_delstrlist(cfg->dynlib_file);
1502 #ifdef USE_IPSECMOD
1503         free(cfg->ipsecmod_hook);
1504         config_delstrlist(cfg->ipsecmod_whitelist);
1505 #endif
1506 #ifdef USE_CACHEDB
1507         free(cfg->cachedb_backend);
1508         free(cfg->cachedb_secret);
1509 #ifdef USE_REDIS
1510         free(cfg->redis_server_host);
1511 #endif  /* USE_REDIS */
1512 #endif  /* USE_CACHEDB */
1513 #ifdef USE_IPSET
1514         free(cfg->ipset_name_v4);
1515         free(cfg->ipset_name_v6);
1516 #endif
1517         free(cfg);
1518 }
1519
1520 static void
1521 init_outgoing_availports(int* a, int num)
1522 {
1523         /* generated with make iana_update */
1524         const int iana_assigned[] = {
1525 #include "util/iana_ports.inc"
1526                 -1 }; /* end marker to put behind trailing comma */
1527
1528         int i;
1529         /* do not use <1024, that could be trouble with the system, privs */
1530         for(i=1024; i<num; i++) {
1531                 a[i] = i;
1532         }
1533         /* create empty spot at 49152 to keep ephemeral ports available
1534          * to other programs */
1535         for(i=49152; i<49152+256; i++)
1536                 a[i] = 0;
1537         /* pick out all the IANA assigned ports */
1538         for(i=0; iana_assigned[i]!=-1; i++) {
1539                 if(iana_assigned[i] < num)
1540                         a[iana_assigned[i]] = 0;
1541         }
1542 }
1543
1544 int
1545 cfg_mark_ports(const char* str, int allow, int* avail, int num)
1546 {
1547         char* mid = strchr(str, '-');
1548 #ifdef DISABLE_EXPLICIT_PORT_RANDOMISATION
1549         log_warn("Explicit port randomisation disabled, ignoring "
1550                 "outgoing-port-permit and outgoing-port-avoid configuration "
1551                 "options");
1552 #endif
1553         if(!mid) {
1554                 int port = atoi(str);
1555                 if(port == 0 && strcmp(str, "0") != 0) {
1556                         log_err("cannot parse port number '%s'", str);
1557                         return 0;
1558                 }
1559                 if(port < num)
1560                         avail[port] = (allow?port:0);
1561         } else {
1562                 int i, low, high = atoi(mid+1);
1563                 char buf[16];
1564                 if(high == 0 && strcmp(mid+1, "0") != 0) {
1565                         log_err("cannot parse port number '%s'", mid+1);
1566                         return 0;
1567                 }
1568                 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) {
1569                         log_err("cannot parse port number '%s'", str);
1570                         return 0;
1571                 }
1572                 if(mid > str)
1573                         memcpy(buf, str, (size_t)(mid-str));
1574                 buf[mid-str] = 0;
1575                 low = atoi(buf);
1576                 if(low == 0 && strcmp(buf, "0") != 0) {
1577                         log_err("cannot parse port number '%s'", buf);
1578                         return 0;
1579                 }
1580                 for(i=low; i<=high; i++) {
1581                         if(i < num)
1582                                 avail[i] = (allow?i:0);
1583                 }
1584                 return 1;
1585         }
1586         return 1;
1587 }
1588
1589 int
1590 cfg_scan_ports(int* avail, int num)
1591 {
1592         int i;
1593         int count = 0;
1594         for(i=0; i<num; i++) {
1595                 if(avail[i])
1596                         count++;
1597         }
1598         return count;
1599 }
1600
1601 int cfg_condense_ports(struct config_file* cfg, int** avail)
1602 {
1603         int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536);
1604         int i, at = 0;
1605         *avail = NULL;
1606         if(num == 0)
1607                 return 0;
1608         *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int));
1609         if(!*avail)
1610                 return 0;
1611         for(i=0; i<65536; i++) {
1612                 if(cfg->outgoing_avail_ports[i])
1613                         (*avail)[at++] = cfg->outgoing_avail_ports[i];
1614         }
1615         log_assert(at == num);
1616         return num;
1617 }
1618
1619 /** print error with file and line number */
1620 static void ub_c_error_va_list(const char *fmt, va_list args)
1621 {
1622         cfg_parser->errors++;
1623         fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
1624         cfg_parser->line);
1625         vfprintf(stderr, fmt, args);
1626         fprintf(stderr, "\n");
1627 }
1628
1629 /** print error with file and line number */
1630 void ub_c_error_msg(const char* fmt, ...)
1631 {
1632         va_list args;
1633         va_start(args, fmt);
1634         ub_c_error_va_list(fmt, args);
1635         va_end(args);
1636 }
1637
1638 void ub_c_error(const char *str)
1639 {
1640         cfg_parser->errors++;
1641         fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
1642                 cfg_parser->line, str);
1643 }
1644
1645 int ub_c_wrap(void)
1646 {
1647         return 1;
1648 }
1649
1650 int cfg_strlist_append(struct config_strlist_head* list, char* item)
1651 {
1652         struct config_strlist *s;
1653         if(!item || !list) {
1654                 free(item);
1655                 return 0;
1656         }
1657         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1658         if(!s) {
1659                 free(item);
1660                 return 0;
1661         }
1662         s->str = item;
1663         s->next = NULL;
1664         if(list->last)
1665                 list->last->next = s;
1666         else
1667                 list->first = s;
1668         list->last = s;
1669         return 1;
1670 }
1671
1672 int
1673 cfg_region_strlist_insert(struct regional* region,
1674         struct config_strlist** head, char* item)
1675 {
1676         struct config_strlist *s;
1677         if(!item || !head)
1678                 return 0;
1679         s = (struct config_strlist*)regional_alloc_zero(region,
1680                 sizeof(struct config_strlist));
1681         if(!s)
1682                 return 0;
1683         s->str = item;
1684         s->next = *head;
1685         *head = s;
1686         return 1;
1687 }
1688
1689 struct config_strlist*
1690 cfg_strlist_find(struct config_strlist* head, const char *item)
1691 {
1692         struct config_strlist *s = head;
1693         if(!head){
1694                 return NULL;
1695         }
1696         while(s) {
1697                 if(strcmp(s->str, item) == 0) {
1698                         return s;
1699                 }
1700                 s = s->next;
1701         }
1702         return NULL;
1703 }
1704
1705 int
1706 cfg_strlist_insert(struct config_strlist** head, char* item)
1707 {
1708         struct config_strlist *s;
1709         if(!item || !head) {
1710                 free(item);
1711                 return 0;
1712         }
1713         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1714         if(!s) {
1715                 free(item);
1716                 return 0;
1717         }
1718         s->str = item;
1719         s->next = *head;
1720         *head = s;
1721         return 1;
1722 }
1723
1724 int
1725 cfg_strlist_append_ex(struct config_strlist** head, char* item)
1726 {
1727         struct config_strlist *s;
1728         if(!item || !head)
1729                 return 0;
1730         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1731         if(!s)
1732                 return 0;
1733         s->str = item;
1734         s->next = NULL;
1735
1736         if (*head==NULL) {
1737                 *head = s;
1738         } else {
1739                 struct config_strlist *last = *head;
1740                 while (last->next!=NULL) {
1741                     last = last->next;
1742                 }
1743                 last->next = s;
1744         }
1745
1746         return 1;
1747 }
1748
1749 int
1750 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
1751 {
1752         struct config_str2list *s;
1753         if(!item || !i2 || !head) {
1754                 free(item);
1755                 free(i2);
1756                 return 0;
1757         }
1758         s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
1759         if(!s) {
1760                 free(item);
1761                 free(i2);
1762                 return 0;
1763         }
1764         s->str = item;
1765         s->str2 = i2;
1766         s->next = *head;
1767         *head = s;
1768         return 1;
1769 }
1770
1771 int
1772 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2,
1773         char* i3)
1774 {
1775         struct config_str3list *s;
1776         if(!item || !i2 || !i3 || !head)
1777                 return 0;
1778         s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list));
1779         if(!s)
1780                 return 0;
1781         s->str = item;
1782         s->str2 = i2;
1783         s->str3 = i3;
1784         s->next = *head;
1785         *head = s;
1786         return 1;
1787 }
1788
1789 int
1790 cfg_strbytelist_insert(struct config_strbytelist** head, char* item,
1791         uint8_t* i2, size_t i2len)
1792 {
1793         struct config_strbytelist* s;
1794         if(!item || !i2 || !head)
1795                 return 0;
1796         s = (struct config_strbytelist*)calloc(1, sizeof(*s));
1797         if(!s)
1798                 return 0;
1799         s->str = item;
1800         s->str2 = i2;
1801         s->str2len = i2len;
1802         s->next = *head;
1803         *head = s;
1804         return 1;
1805 }
1806
1807 time_t
1808 cfg_convert_timeval(const char* str)
1809 {
1810         time_t t;
1811         struct tm tm;
1812         memset(&tm, 0, sizeof(tm));
1813         if(strlen(str) < 14)
1814                 return 0;
1815         if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
1816                 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
1817                 return 0;
1818         tm.tm_year -= 1900;
1819         tm.tm_mon--;
1820         /* Check values */
1821         if (tm.tm_year < 70)    return 0;
1822         if (tm.tm_mon < 0 || tm.tm_mon > 11)    return 0;
1823         if (tm.tm_mday < 1 || tm.tm_mday > 31)  return 0;
1824         if (tm.tm_hour < 0 || tm.tm_hour > 23)  return 0;
1825         if (tm.tm_min < 0 || tm.tm_min > 59)    return 0;
1826         if (tm.tm_sec < 0 || tm.tm_sec > 59)    return 0;
1827         /* call ldns conversion function */
1828         t = sldns_mktime_from_utc(&tm);
1829         return t;
1830 }
1831
1832 int
1833 cfg_count_numbers(const char* s)
1834 {
1835         /* format ::= (sp num)+ sp  */
1836         /* num ::= [-](0-9)+        */
1837         /* sp ::= (space|tab)*      */
1838         int num = 0;
1839         while(*s) {
1840                 while(*s && isspace((unsigned char)*s))
1841                         s++;
1842                 if(!*s) /* end of string */
1843                         break;
1844                 if(*s == '-')
1845                         s++;
1846                 if(!*s) /* only - not allowed */
1847                         return 0;
1848                 if(!isdigit((unsigned char)*s)) /* bad character */
1849                         return 0;
1850                 while(*s && isdigit((unsigned char)*s))
1851                         s++;
1852                 num++;
1853         }
1854         return num;
1855 }
1856
1857 /** all digit number */
1858 static int isalldigit(const char* str, size_t l)
1859 {
1860         size_t i;
1861         for(i=0; i<l; i++)
1862                 if(!isdigit((unsigned char)str[i]))
1863                         return 0;
1864         return 1;
1865 }
1866
1867 int
1868 cfg_parse_memsize(const char* str, size_t* res)
1869 {
1870         size_t len;
1871         size_t mult = 1;
1872         if(!str || (len=(size_t)strlen(str)) == 0) {
1873                 log_err("not a size: '%s'", str);
1874                 return 0;
1875         }
1876         if(isalldigit(str, len)) {
1877                 *res = (size_t)atol(str);
1878                 return 1;
1879         }
1880         /* check appended num */
1881         while(len>0 && str[len-1]==' ')
1882                 len--;
1883         if(len > 1 && str[len-1] == 'b')
1884                 len--;
1885         else if(len > 1 && str[len-1] == 'B')
1886                 len--;
1887
1888         if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
1889                 mult = 1024*1024*1024;
1890         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
1891                 mult = 1024*1024;
1892         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k')
1893                 mult = 1024;
1894         else if(len > 0 && isdigit((unsigned char)str[len-1]))
1895                 mult = 1;
1896         else {
1897                 log_err("unknown size specifier: '%s'", str);
1898                 return 0;
1899         }
1900         while(len>1 && str[len-2]==' ')
1901                 len--;
1902
1903         if(!isalldigit(str, len-1)) {
1904                 log_err("unknown size specifier: '%s'", str);
1905                 return 0;
1906         }
1907         *res = ((size_t)atol(str)) * mult;
1908         return 1;
1909 }
1910
1911 int
1912 find_tag_id(struct config_file* cfg, const char* tag)
1913 {
1914         int i;
1915         for(i=0; i<cfg->num_tags; i++) {
1916                 if(strcmp(cfg->tagname[i], tag) == 0)
1917                         return i;
1918         }
1919         return -1;
1920 }
1921
1922 int
1923 config_add_tag(struct config_file* cfg, const char* tag)
1924 {
1925         char** newarray;
1926         char* newtag;
1927         if(find_tag_id(cfg, tag) != -1)
1928                 return 1; /* nothing to do */
1929         newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1));
1930         if(!newarray)
1931                 return 0;
1932         newtag = strdup(tag);
1933         if(!newtag) {
1934                 free(newarray);
1935                 return 0;
1936         }
1937         if(cfg->tagname) {
1938                 memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags);
1939                 free(cfg->tagname);
1940         }
1941         newarray[cfg->num_tags++] = newtag;
1942         cfg->tagname = newarray;
1943         return 1;
1944 }
1945
1946 /** set a bit in a bit array */
1947 static void
1948 cfg_set_bit(uint8_t* bitlist, size_t len, int id)
1949 {
1950         int pos = id/8;
1951         log_assert((size_t)pos < len);
1952         (void)len;
1953         bitlist[pos] |= 1<<(id%8);
1954 }
1955
1956 uint8_t* config_parse_taglist(struct config_file* cfg, char* str,
1957         size_t* listlen)
1958 {
1959         uint8_t* taglist = NULL;
1960         size_t len = 0;
1961         char* p, *s;
1962
1963         /* allocate */
1964         if(cfg->num_tags == 0) {
1965                 log_err("parse taglist, but no tags defined");
1966                 return 0;
1967         }
1968         len = (size_t)(cfg->num_tags+7)/8;
1969         taglist = calloc(1, len);
1970         if(!taglist) {
1971                 log_err("out of memory");
1972                 return 0;
1973         }
1974
1975         /* parse */
1976         s = str;
1977         while((p=strsep(&s, " \t\n")) != NULL) {
1978                 if(*p) {
1979                         int id = find_tag_id(cfg, p);
1980                         /* set this bit in the bitlist */
1981                         if(id == -1) {
1982                                 log_err("unknown tag: %s", p);
1983                                 free(taglist);
1984                                 return 0;
1985                         }
1986                         cfg_set_bit(taglist, len, id);
1987                 }
1988         }
1989
1990         *listlen = len;
1991         return taglist;
1992 }
1993
1994 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist,
1995         size_t taglen)
1996 {
1997         char buf[10240];
1998         size_t i, j, len = 0;
1999         buf[0] = 0;
2000         for(i=0; i<taglen; i++) {
2001                 if(taglist[i] == 0)
2002                         continue;
2003                 for(j=0; j<8; j++) {
2004                         if((taglist[i] & (1<<j)) != 0) {
2005                                 size_t id = i*8 + j;
2006                                 snprintf(buf+len, sizeof(buf)-len, "%s%s",
2007                                         (len==0?"":" "), cfg->tagname[id]);
2008                                 len += strlen(buf+len);
2009                         }
2010                 }
2011         }
2012         return strdup(buf);
2013 }
2014
2015 int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2,
2016         size_t list2len)
2017 {
2018         size_t i;
2019         if(!list1 || !list2)
2020                 return 0;
2021         for(i=0; i<list1len && i<list2len; i++) {
2022                 if((list1[i] & list2[i]) != 0)
2023                         return 1;
2024         }
2025         return 0;
2026 }
2027
2028 void
2029 config_apply(struct config_file* config)
2030 {
2031         MAX_TTL = (time_t)config->max_ttl;
2032         MIN_TTL = (time_t)config->min_ttl;
2033         SERVE_EXPIRED = config->serve_expired;
2034         SERVE_EXPIRED_TTL = (time_t)config->serve_expired_ttl;
2035         SERVE_EXPIRED_REPLY_TTL = (time_t)config->serve_expired_reply_ttl;
2036         MAX_NEG_TTL = (time_t)config->max_negative_ttl;
2037         RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
2038         EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
2039         MINIMAL_RESPONSES = config->minimal_responses;
2040         RRSET_ROUNDROBIN = config->rrset_roundrobin;
2041         LOG_TAG_QUERYREPLY = config->log_tag_queryreply;
2042         UNKNOWN_SERVER_NICENESS = config->unknown_server_time_limit;
2043         log_set_time_asc(config->log_time_ascii);
2044         autr_permit_small_holddown = config->permit_small_holddown;
2045         stream_wait_max = config->stream_wait_size;
2046 }
2047
2048 void config_lookup_uid(struct config_file* cfg)
2049 {
2050 #ifdef HAVE_GETPWNAM
2051         /* translate username into uid and gid */
2052         if(cfg->username && cfg->username[0]) {
2053                 struct passwd *pwd;
2054                 if((pwd = getpwnam(cfg->username)) != NULL) {
2055                         cfg_uid = pwd->pw_uid;
2056                         cfg_gid = pwd->pw_gid;
2057                 }
2058         }
2059 #else
2060         (void)cfg;
2061 #endif
2062 }
2063
2064 /**
2065  * Calculate string length of full pathname in original filesys
2066  * @param fname: the path name to convert.
2067  *      Must not be null or empty.
2068  * @param cfg: config struct for chroot and chdir (if set).
2069  * @param use_chdir: if false, only chroot is applied.
2070  * @return length of string.
2071  *      remember to allocate one more for 0 at end in mallocs.
2072  */
2073 static size_t
2074 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2075 {
2076         size_t len = 0;
2077         int slashit = 0;
2078         if(cfg->chrootdir && cfg->chrootdir[0] &&
2079                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2080                 /* already full pathname, return it */
2081                 return strlen(fname);
2082         }
2083         /* chroot */
2084         if(cfg->chrootdir && cfg->chrootdir[0]) {
2085                 /* start with chrootdir */
2086                 len += strlen(cfg->chrootdir);
2087                 slashit = 1;
2088         }
2089         /* chdir */
2090 #ifdef UB_ON_WINDOWS
2091         if(fname[0] != 0 && fname[1] == ':') {
2092                 /* full path, no chdir */
2093         } else
2094 #endif
2095         if(fname[0] == '/' || !use_chdir) {
2096                 /* full path, no chdir */
2097         } else if(cfg->directory && cfg->directory[0]) {
2098                 /* prepend chdir */
2099                 if(slashit && cfg->directory[0] != '/')
2100                         len++;
2101                 if(cfg->chrootdir && cfg->chrootdir[0] &&
2102                         strncmp(cfg->chrootdir, cfg->directory,
2103                         strlen(cfg->chrootdir)) == 0)
2104                         len += strlen(cfg->directory)-strlen(cfg->chrootdir);
2105                 else    len += strlen(cfg->directory);
2106                 slashit = 1;
2107         }
2108         /* fname */
2109         if(slashit && fname[0] != '/')
2110                 len++;
2111         len += strlen(fname);
2112         return len;
2113 }
2114
2115 char*
2116 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
2117 {
2118         size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1;
2119         int slashit = 0;
2120         char* buf = (char*)malloc(len);
2121         if(!buf)
2122                 return NULL;
2123         buf[0] = 0;
2124         /* is fname already in chroot ? */
2125         if(cfg->chrootdir && cfg->chrootdir[0] &&
2126                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
2127                 /* already full pathname, return it */
2128                 (void)strlcpy(buf, fname, len);
2129                 buf[len-1] = 0;
2130                 return buf;
2131         }
2132         /* chroot */
2133         if(cfg->chrootdir && cfg->chrootdir[0]) {
2134                 /* start with chrootdir */
2135                 (void)strlcpy(buf, cfg->chrootdir, len);
2136                 slashit = 1;
2137         }
2138 #ifdef UB_ON_WINDOWS
2139         if(fname[0] != 0 && fname[1] == ':') {
2140                 /* full path, no chdir */
2141         } else
2142 #endif
2143         /* chdir */
2144         if(fname[0] == '/' || !use_chdir) {
2145                 /* full path, no chdir */
2146         } else if(cfg->directory && cfg->directory[0]) {
2147                 /* prepend chdir */
2148                 if(slashit && cfg->directory[0] != '/')
2149                         (void)strlcat(buf, "/", len);
2150                 /* is the directory already in the chroot? */
2151                 if(cfg->chrootdir && cfg->chrootdir[0] &&
2152                         strncmp(cfg->chrootdir, cfg->directory,
2153                         strlen(cfg->chrootdir)) == 0)
2154                         (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
2155                                    len);
2156                 else (void)strlcat(buf, cfg->directory, len);
2157                 slashit = 1;
2158         }
2159         /* fname */
2160         if(slashit && fname[0] != '/')
2161                 (void)strlcat(buf, "/", len);
2162         (void)strlcat(buf, fname, len);
2163         buf[len-1] = 0;
2164         return buf;
2165 }
2166
2167 /** return next space character in string */
2168 static char* next_space_pos(const char* str)
2169 {
2170         char* sp = strchr(str, ' ');
2171         char* tab = strchr(str, '\t');
2172         if(!tab && !sp)
2173                 return NULL;
2174         if(!sp) return tab;
2175         if(!tab) return sp;
2176         return (sp<tab)?sp:tab;
2177 }
2178
2179 /** return last space character in string */
2180 static char* last_space_pos(const char* str)
2181 {
2182         char* sp = strrchr(str, ' ');
2183         char* tab = strrchr(str, '\t');
2184         if(!tab && !sp)
2185                 return NULL;
2186         if(!sp) return tab;
2187         if(!tab) return sp;
2188         return (sp>tab)?sp:tab;
2189 }
2190
2191 int
2192 cfg_parse_local_zone(struct config_file* cfg, const char* val)
2193 {
2194         const char *type, *name_end, *name;
2195         char buf[256];
2196
2197         /* parse it as: [zone_name] [between stuff] [zone_type] */
2198         name = val;
2199         while(*name && isspace((unsigned char)*name))
2200                 name++;
2201         if(!*name) {
2202                 log_err("syntax error: too short: %s", val);
2203                 return 0;
2204         }
2205         name_end = next_space_pos(name);
2206         if(!name_end || !*name_end) {
2207                 log_err("syntax error: expected zone type: %s", val);
2208                 return 0;
2209         }
2210         if (name_end - name > 255) {
2211                 log_err("syntax error: bad zone name: %s", val);
2212                 return 0;
2213         }
2214         (void)strlcpy(buf, name, sizeof(buf));
2215         buf[name_end-name] = '\0';
2216
2217         type = last_space_pos(name_end);
2218         while(type && *type && isspace((unsigned char)*type))
2219                 type++;
2220         if(!type || !*type) {
2221                 log_err("syntax error: expected zone type: %s", val);
2222                 return 0;
2223         }
2224
2225         if(strcmp(type, "nodefault")==0) {
2226                 return cfg_strlist_insert(&cfg->local_zones_nodefault,
2227                         strdup(name));
2228 #ifdef USE_IPSET
2229         } else if(strcmp(type, "ipset")==0) {
2230                 return cfg_strlist_insert(&cfg->local_zones_ipset,
2231                         strdup(name));
2232 #endif
2233         } else {
2234                 return cfg_str2list_insert(&cfg->local_zones, strdup(buf),
2235                         strdup(type));
2236         }
2237 }
2238
2239 char* cfg_ptr_reverse(char* str)
2240 {
2241         char* ip, *ip_end;
2242         char* name;
2243         char* result;
2244         char buf[1024];
2245         struct sockaddr_storage addr;
2246         socklen_t addrlen;
2247
2248         /* parse it as: [IP] [between stuff] [name] */
2249         ip = str;
2250         while(*ip && isspace((unsigned char)*ip))
2251                 ip++;
2252         if(!*ip) {
2253                 log_err("syntax error: too short: %s", str);
2254                 return NULL;
2255         }
2256         ip_end = next_space_pos(ip);
2257         if(!ip_end || !*ip_end) {
2258                 log_err("syntax error: expected name: %s", str);
2259                 return NULL;
2260         }
2261
2262         name = last_space_pos(ip_end);
2263         if(!name || !*name) {
2264                 log_err("syntax error: expected name: %s", str);
2265                 return NULL;
2266         }
2267
2268         sscanf(ip, "%100s", buf);
2269         buf[sizeof(buf)-1]=0;
2270
2271         if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) {
2272                 log_err("syntax error: cannot parse address: %s", str);
2273                 return NULL;
2274         }
2275
2276         /* reverse IPv4:
2277          * ddd.ddd.ddd.ddd.in-addr-arpa.
2278          * IPv6: (h.){32}.ip6.arpa.  */
2279
2280         if(addr_is_ip6(&addr, addrlen)) {
2281                 uint8_t ad[16];
2282                 const char* hex = "0123456789abcdef";
2283                 char *p = buf;
2284                 int i;
2285                 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
2286                         sizeof(ad));
2287                 for(i=15; i>=0; i--) {
2288                         uint8_t b = ad[i];
2289                         *p++ = hex[ (b&0x0f) ];
2290                         *p++ = '.';
2291                         *p++ = hex[ (b&0xf0) >> 4 ];
2292                         *p++ = '.';
2293                 }
2294                 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
2295         } else {
2296                 uint8_t ad[4];
2297                 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
2298                         sizeof(ad));
2299                 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
2300                         (unsigned)ad[3], (unsigned)ad[2],
2301                         (unsigned)ad[1], (unsigned)ad[0]);
2302         }
2303
2304         /* printed the reverse address, now the between goop and name on end */
2305         while(*ip_end && isspace((unsigned char)*ip_end))
2306                 ip_end++;
2307         if(name>ip_end) {
2308                 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s",
2309                         (int)(name-ip_end), ip_end);
2310         }
2311         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name);
2312
2313         result = strdup(buf);
2314         if(!result) {
2315                 log_err("out of memory parsing %s", str);
2316                 return NULL;
2317         }
2318         return result;
2319 }
2320
2321 #ifdef UB_ON_WINDOWS
2322 char*
2323 w_lookup_reg_str(const char* key, const char* name)
2324 {
2325         HKEY hk = NULL;
2326         DWORD type = 0;
2327         BYTE buf[1024];
2328         DWORD len = (DWORD)sizeof(buf);
2329         LONG ret;
2330         char* result = NULL;
2331         ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
2332         if(ret == ERROR_FILE_NOT_FOUND)
2333                 return NULL; /* key does not exist */
2334         else if(ret != ERROR_SUCCESS) {
2335                 log_err("RegOpenKeyEx failed");
2336                 return NULL;
2337         }
2338         ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
2339         if(RegCloseKey(hk))
2340                 log_err("RegCloseKey");
2341         if(ret == ERROR_FILE_NOT_FOUND)
2342                 return NULL; /* name does not exist */
2343         else if(ret != ERROR_SUCCESS) {
2344                 log_err("RegQueryValueEx failed");
2345                 return NULL;
2346         }
2347         if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
2348                 buf[sizeof(buf)-1] = 0;
2349                 buf[sizeof(buf)-2] = 0; /* for multi_sz */
2350                 result = strdup((char*)buf);
2351                 if(!result) log_err("out of memory");
2352         }
2353         return result;
2354 }
2355
2356 void w_config_adjust_directory(struct config_file* cfg)
2357 {
2358         if(cfg->directory && cfg->directory[0]) {
2359                 TCHAR dirbuf[2*MAX_PATH+4];
2360                 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) {
2361                         /* get executable path, and if that contains
2362                          * directories, snip off the filename part */
2363                         dirbuf[0] = 0;
2364                         if(!GetModuleFileName(NULL, dirbuf, MAX_PATH))
2365                                 log_err("could not GetModuleFileName");
2366                         if(strrchr(dirbuf, '\\')) {
2367                                 (strrchr(dirbuf, '\\'))[0] = 0;
2368                         } else log_err("GetModuleFileName had no path");
2369                         if(dirbuf[0]) {
2370                                 /* adjust directory for later lookups to work*/
2371                                 free(cfg->directory);
2372                                 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1);
2373                         }
2374                 }
2375         }
2376 }
2377 #endif /* UB_ON_WINDOWS */
2378
2379 void errinf(struct module_qstate* qstate, const char* str)
2380 {
2381         struct config_strlist* p;
2382         if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str)
2383                 return;
2384         p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p));
2385         if(!p) {
2386                 log_err("malloc failure in validator-error-info string");
2387                 return;
2388         }
2389         p->next = NULL;
2390         p->str = regional_strdup(qstate->region, str);
2391         if(!p->str) {
2392                 log_err("malloc failure in validator-error-info string");
2393                 return;
2394         }
2395         /* add at end */
2396         if(qstate->errinf) {
2397                 struct config_strlist* q = qstate->errinf;
2398                 while(q->next)
2399                         q = q->next;
2400                 q->next = p;
2401         } else  qstate->errinf = p;
2402 }
2403
2404 void errinf_origin(struct module_qstate* qstate, struct sock_list *origin)
2405 {
2406         struct sock_list* p;
2407         if(qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail)
2408                 return;
2409         for(p=origin; p; p=p->next) {
2410                 char buf[256];
2411                 if(p == origin)
2412                         snprintf(buf, sizeof(buf), "from ");
2413                 else    snprintf(buf, sizeof(buf), "and ");
2414                 if(p->len == 0)
2415                         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf),
2416                                 "cache");
2417                 else
2418                         addr_to_str(&p->addr, p->len, buf+strlen(buf),
2419                                 sizeof(buf)-strlen(buf));
2420                 errinf(qstate, buf);
2421         }
2422 }
2423
2424 char* errinf_to_str_bogus(struct module_qstate* qstate)
2425 {
2426         char buf[20480];
2427         char* p = buf;
2428         size_t left = sizeof(buf);
2429         struct config_strlist* s;
2430         char dname[LDNS_MAX_DOMAINLEN+1];
2431         char t[16], c[16];
2432         sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t));
2433         sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c));
2434         dname_str(qstate->qinfo.qname, dname);
2435         snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c);
2436         left -= strlen(p); p += strlen(p);
2437         if(!qstate->errinf)
2438                 snprintf(p, left, " misc failure");
2439         else for(s=qstate->errinf; s; s=s->next) {
2440                 snprintf(p, left, " %s", s->str);
2441                 left -= strlen(p); p += strlen(p);
2442         }
2443         p = strdup(buf);
2444         if(!p)
2445                 log_err("malloc failure in errinf_to_str");
2446         return p;
2447 }
2448
2449 char* errinf_to_str_servfail(struct module_qstate* qstate)
2450 {
2451         char buf[20480];
2452         char* p = buf;
2453         size_t left = sizeof(buf);
2454         struct config_strlist* s;
2455         char dname[LDNS_MAX_DOMAINLEN+1];
2456         char t[16], c[16];
2457         sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t));
2458         sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c));
2459         dname_str(qstate->qinfo.qname, dname);
2460         snprintf(p, left, "SERVFAIL <%s %s %s>:", dname, t, c);
2461         left -= strlen(p); p += strlen(p);
2462         if(!qstate->errinf)
2463                 snprintf(p, left, " misc failure");
2464         else for(s=qstate->errinf; s; s=s->next) {
2465                 snprintf(p, left, " %s", s->str);
2466                 left -= strlen(p); p += strlen(p);
2467         }
2468         p = strdup(buf);
2469         if(!p)
2470                 log_err("malloc failure in errinf_to_str");
2471         return p;
2472 }
2473
2474 void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr)
2475 {
2476         char buf[1024];
2477         char dname[LDNS_MAX_DOMAINLEN+1];
2478         char t[16], c[16];
2479         if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !rr)
2480                 return;
2481         sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t));
2482         sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c));
2483         dname_str(rr->rk.dname, dname);
2484         snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c);
2485         errinf(qstate, buf);
2486 }
2487
2488 void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname)
2489 {
2490         char b[1024];
2491         char buf[LDNS_MAX_DOMAINLEN+1];
2492         if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str || !dname)
2493                 return;
2494         dname_str(dname, buf);
2495         snprintf(b, sizeof(b), "%s %s", str, buf);
2496         errinf(qstate, b);
2497 }
2498
2499 int options_remote_is_address(struct config_file* cfg)
2500 {
2501         if(!cfg->remote_control_enable) return 0;
2502         if(!cfg->control_ifs.first) return 1;
2503         if(!cfg->control_ifs.first->str) return 1;
2504         if(cfg->control_ifs.first->str[0] == 0) return 1;
2505         return (cfg->control_ifs.first->str[0] != '/');
2506 }
2507