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