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