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 HAVE_PWD_H
  66 #include <pwd.h>
  67 #endif
  68
  69 /** from cfg username, after daemonise setup performed */
  70 uid_t cfg_uid = (uid_t)-1;
  71 /** from cfg username, after daemonise setup performed */
  72 gid_t cfg_gid = (gid_t)-1;
  73 /** for debug allow small timeout values for fast rollovers */
  74 int autr_permit_small_holddown = 0;
  75
  76 /** global config during parsing */
  77 struct config_parser_state* cfg_parser = 0;
  78
  79 /** init ports possible for use */
  80 static void init_outgoing_availports(int* array, int num);
  81
  82 struct config_file*
  83 config_create(void)
  84 {
  85         struct config_file* cfg;
  86         cfg = (struct config_file*)calloc(1, sizeof(struct config_file));
  87         if(!cfg)
  88                 return NULL;
  89         /* the defaults if no config is present */
  90         cfg->verbosity = 1;
  91         cfg->stat_interval = 0;
  92         cfg->stat_cumulative = 0;
  93         cfg->stat_extended = 0;
  94         cfg->num_threads = 1;
  95         cfg->port = UNBOUND_DNS_PORT;
  96         cfg->do_ip4 = 1;
  97         cfg->do_ip6 = 1;
  98         cfg->do_udp = 1;
  99         cfg->do_tcp = 1;
 100         cfg->tcp_upstream = 0;
 101         cfg->ssl_service_key = NULL;
 102         cfg->ssl_service_pem = NULL;
 103         cfg->ssl_port = 443;
 104         cfg->ssl_upstream = 0;
 105         cfg->use_syslog = 1;
 106         cfg->log_time_ascii = 0;
 107         cfg->log_queries = 0;
 108 #ifndef USE_WINSOCK
 109 #  ifdef USE_MINI_EVENT
 110         /* select max 1024 sockets */
 111         cfg->outgoing_num_ports = 960;
 112         cfg->num_queries_per_thread = 512;
 113 #  else
 114         /* libevent can use many sockets */
 115         cfg->outgoing_num_ports = 4096;
 116         cfg->num_queries_per_thread = 1024;
 117 #  endif
 118         cfg->outgoing_num_tcp = 10;
 119         cfg->incoming_num_tcp = 10;
 120 #else
 121         cfg->outgoing_num_ports = 48; /* windows is limited in num fds */
 122         cfg->num_queries_per_thread = 24;
 123         cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */
 124         cfg->incoming_num_tcp = 2;
 125 #endif
 126         cfg->edns_buffer_size = 4096; /* 4k from rfc recommendation */
 127         cfg->msg_buffer_size = 65552; /* 64 k + a small margin */
 128         cfg->msg_cache_size = 4 * 1024 * 1024;
 129         cfg->msg_cache_slabs = 4;
 130         cfg->jostle_time = 200;
 131         cfg->rrset_cache_size = 4 * 1024 * 1024;
 132         cfg->rrset_cache_slabs = 4;
 133         cfg->host_ttl = 900;
 134         cfg->bogus_ttl = 60;
 135         cfg->min_ttl = 0;
 136         cfg->max_ttl = 3600 * 24;
 137         cfg->max_negative_ttl = 3600;
 138         cfg->prefetch = 0;
 139         cfg->prefetch_key = 0;
 140         cfg->infra_cache_slabs = 4;
 141         cfg->infra_cache_numhosts = 10000;
 142         cfg->infra_cache_min_rtt = 50;
 143         cfg->delay_close = 0;
 144         if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int))))
 145                 goto error_exit;
 146         init_outgoing_availports(cfg->outgoing_avail_ports, 65536);
 147         if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit;
 148 #ifdef HAVE_CHROOT
 149         if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit;
 150 #endif
 151         if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit;
 152         if(!(cfg->logfile = strdup(""))) goto error_exit;
 153         if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit;
 154         if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit;
 155         cfg->donotqueryaddrs = NULL;
 156         cfg->donotquery_localhost = 1;
 157         cfg->root_hints = NULL;
 158         cfg->do_daemonize = 1;
 159         cfg->if_automatic = 0;
 160         cfg->so_rcvbuf = 0;
 161         cfg->so_sndbuf = 0;
 162         cfg->so_reuseport = 0;
 163         cfg->ip_transparent = 0;
 164         cfg->num_ifs = 0;
 165         cfg->ifs = NULL;
 166         cfg->num_out_ifs = 0;
 167         cfg->out_ifs = NULL;
 168         cfg->stubs = NULL;
 169         cfg->forwards = NULL;
 170         cfg->acls = NULL;
 171         cfg->harden_short_bufsize = 0;
 172         cfg->harden_large_queries = 0;
 173         cfg->harden_glue = 1;
 174         cfg->harden_dnssec_stripped = 1;
 175         cfg->harden_below_nxdomain = 0;
 176         cfg->harden_referral_path = 0;
 177         cfg->harden_algo_downgrade = 0;
 178         cfg->use_caps_bits_for_id = 0;
 179         cfg->caps_whitelist = NULL;
 180         cfg->private_address = NULL;
 181         cfg->private_domain = NULL;
 182         cfg->unwanted_threshold = 0;
 183         cfg->hide_identity = 0;
 184         cfg->hide_version = 0;
 185         cfg->identity = NULL;
 186         cfg->version = NULL;
 187         cfg->auto_trust_anchor_file_list = NULL;
 188         cfg->trust_anchor_file_list = NULL;
 189         cfg->trust_anchor_list = NULL;
 190         cfg->trusted_keys_file_list = NULL;
 191         cfg->dlv_anchor_file = NULL;
 192         cfg->dlv_anchor_list = NULL;
 193         cfg->domain_insecure = NULL;
 194         cfg->val_date_override = 0;
 195         cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */
 196         cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */
 197         cfg->val_clean_additional = 1;
 198         cfg->val_log_level = 0;
 199         cfg->val_log_squelch = 0;
 200         cfg->val_permissive_mode = 0;
 201         cfg->ignore_cd = 0;
 202         cfg->add_holddown = 30*24*3600;
 203         cfg->del_holddown = 30*24*3600;
 204         cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */
 205         cfg->permit_small_holddown = 0;
 206         cfg->key_cache_size = 4 * 1024 * 1024;
 207         cfg->key_cache_slabs = 4;
 208         cfg->neg_cache_size = 1 * 1024 * 1024;
 209         cfg->local_zones = NULL;
 210         cfg->local_zones_nodefault = NULL;
 211         cfg->local_data = NULL;
 212         cfg->unblock_lan_zones = 0;
 213         cfg->python_script = NULL;
 214         cfg->remote_control_enable = 0;
 215         cfg->control_ifs = NULL;
 216         cfg->control_port = UNBOUND_CONTROL_PORT;
 217         cfg->remote_control_use_cert = 1;
 218         cfg->minimal_responses = 0;
 219         cfg->rrset_roundrobin = 0;
 220         cfg->max_udp_size = 4096;
 221         if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
 222                 goto error_exit;
 223         if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
 224                 goto error_exit;
 225         if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
 226                 goto error_exit;
 227         if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
 228                 goto error_exit;
 229
 230         if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
 231         if(!(cfg->val_nsec3_key_iterations =
 232                 strdup("1024 150 2048 500 4096 2500"))) goto error_exit;
 233 #if defined(DNSTAP_SOCKET_PATH)
 234         if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
 235                 goto error_exit;
 236 #endif
 237         cfg->ratelimit = 0;
 238         cfg->ratelimit_slabs = 4;
 239         cfg->ratelimit_size = 4*1024*1024;
 240         cfg->ratelimit_for_domain = NULL;
 241         cfg->ratelimit_below_domain = NULL;
 242         cfg->ratelimit_factor = 10;
 243         return cfg;
 244 error_exit:
 245         config_delete(cfg);
 246         return NULL;
 247 }
 248
 249 struct config_file* config_create_forlib(void)
 250 {
 251         struct config_file* cfg = config_create();
 252         if(!cfg) return NULL;
 253         /* modifications for library use, less verbose, less memory */
 254         free(cfg->chrootdir);
 255         cfg->chrootdir = NULL;
 256         cfg->verbosity = 0;
 257         cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable'
 258                 and probably within the ulimit(maxfds) of the user */
 259         cfg->outgoing_num_tcp = 2;
 260         cfg->msg_cache_size = 1024*1024;
 261         cfg->msg_cache_slabs = 1;
 262         cfg->rrset_cache_size = 1024*1024;
 263         cfg->rrset_cache_slabs = 1;
 264         cfg->infra_cache_slabs = 1;
 265         cfg->use_syslog = 0;
 266         cfg->key_cache_size = 1024*1024;
 267         cfg->key_cache_slabs = 1;
 268         cfg->neg_cache_size = 100 * 1024;
 269         cfg->donotquery_localhost = 0; /* allow, so that you can ask a
 270                 forward nameserver running on localhost */
 271         cfg->val_log_level = 2; /* to fill why_bogus with */
 272         cfg->val_log_squelch = 1;
 273         return cfg;
 274 }
 275
 276 /** check that the value passed is >= 0 */
 277 #define IS_NUMBER_OR_ZERO \
 278         if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0
 279 /** check that the value passed is > 0 */
 280 #define IS_NONZERO_NUMBER \
 281         if(atoi(val) == 0) return 0
 282 /** check that the value passed is not 0 and a power of 2 */
 283 #define IS_POW2_NUMBER \
 284         if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0
 285 /** check that the value passed is yes or no */
 286 #define IS_YES_OR_NO \
 287         if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0
 288 /** put integer_or_zero into variable */
 289 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 290         { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); }
 291 /** put integer_nonzero into variable */
 292 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 293         { IS_NONZERO_NUMBER; cfg->var = atoi(val); }
 294 /** put integer_or_zero into unsigned */
 295 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 296         { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); }
 297 /** put integer_or_zero into size_t */
 298 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 299         { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); }
 300 /** put integer_nonzero into size_t */
 301 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 302         { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); }
 303 /** put yesno into variable */
 304 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \
 305         { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); }
 306 /** put memsize into variable */
 307 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \
 308         { return cfg_parse_memsize(val, &cfg->var); }
 309 /** put pow2 number into variable */
 310 #define S_POW2(str, var) if(strcmp(opt, str)==0) \
 311         { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); }
 312 /** put string into variable */
 313 #define S_STR(str, var) if(strcmp(opt, str)==0) \
 314         { free(cfg->var); return (cfg->var = strdup(val)) != NULL; }
 315 /** put string into strlist */
 316 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \
 317         { return cfg_strlist_insert(&cfg->var, strdup(val)); }
 318
 319 int config_set_option(struct config_file* cfg, const char* opt,
 320         const char* val)
 321 {
 322         S_NUMBER_OR_ZERO("verbosity:", verbosity)
 323         else if(strcmp(opt, "statistics-interval:") == 0) {
 324                 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
 325                         cfg->stat_interval = 0;
 326                 else if(atoi(val) == 0)
 327                         return 0;
 328                 else cfg->stat_interval = atoi(val);
 329         } else if(strcmp(opt, "num_threads:") == 0) {
 330                 /* not supported, library must have 1 thread in bgworker */
 331                 return 0;
 332         } else if(strcmp(opt, "outgoing-port-permit:") == 0) {
 333                 return cfg_mark_ports(val, 1,
 334                         cfg->outgoing_avail_ports, 65536);
 335         } else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
 336                 return cfg_mark_ports(val, 0,
 337                         cfg->outgoing_avail_ports, 65536);
 338         } else if(strcmp(opt, "local-zone:") == 0) {
 339                 return cfg_parse_local_zone(cfg, val);
 340         } else if(strcmp(opt, "val-override-date:") == 0) {
 341                 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) {
 342                         cfg->val_date_override = 0;
 343                 } else if(strlen(val) == 14) {
 344                         cfg->val_date_override = cfg_convert_timeval(val);
 345                         return cfg->val_date_override != 0;
 346                 } else {
 347                         if(atoi(val) == 0) return 0;
 348                         cfg->val_date_override = (uint32_t)atoi(val);
 349                 }
 350         } else if(strcmp(opt, "local-data-ptr:") == 0) {
 351                 char* ptr = cfg_ptr_reverse((char*)opt);
 352                 return cfg_strlist_insert(&cfg->local_data, ptr);
 353         } else if(strcmp(opt, "logfile:") == 0) {
 354                 cfg->use_syslog = 0;
 355                 free(cfg->logfile);
 356                 return (cfg->logfile = strdup(val)) != NULL;
 357         }
 358         else if(strcmp(opt, "log-time-ascii:") == 0)
 359         { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0);
 360           log_set_time_asc(cfg->log_time_ascii); }
 361         else S_SIZET_NONZERO("max-udp-size:", max_udp_size)
 362         else S_YNO("use-syslog:", use_syslog)
 363         else S_YNO("extended-statistics:", stat_extended)
 364         else S_YNO("statistics-cumulative:", stat_cumulative)
 365         else S_YNO("do-ip4:", do_ip4)
 366         else S_YNO("do-ip6:", do_ip6)
 367         else S_YNO("do-udp:", do_udp)
 368         else S_YNO("do-tcp:", do_tcp)
 369         else S_YNO("tcp-upstream:", tcp_upstream)
 370         else S_YNO("ssl-upstream:", ssl_upstream)
 371         else S_STR("ssl-service-key:", ssl_service_key)
 372         else S_STR("ssl-service-pem:", ssl_service_pem)
 373         else S_NUMBER_NONZERO("ssl-port:", ssl_port)
 374         else S_YNO("interface-automatic:", if_automatic)
 375         else S_YNO("do-daemonize:", do_daemonize)
 376         else S_NUMBER_NONZERO("port:", port)
 377         else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports)
 378         else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp)
 379         else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp)
 380         else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size)
 381         else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size)
 382         else S_MEMSIZE("msg-cache-size:", msg_cache_size)
 383         else S_POW2("msg-cache-slabs:", msg_cache_slabs)
 384         else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread)
 385         else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time)
 386         else S_MEMSIZE("so-rcvbuf:", so_rcvbuf)
 387         else S_MEMSIZE("so-sndbuf:", so_sndbuf)
 388         else S_YNO("so-reuseport:", so_reuseport)
 389         else S_YNO("ip-transparent:", ip_transparent)
 390         else S_MEMSIZE("rrset-cache-size:", rrset_cache_size)
 391         else S_POW2("rrset-cache-slabs:", rrset_cache_slabs)
 392         else S_YNO("prefetch:", prefetch)
 393         else S_YNO("prefetch-key:", prefetch_key)
 394         else if(strcmp(opt, "cache-max-ttl:") == 0)
 395         { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
 396         else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
 397         { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
 398         else if(strcmp(opt, "cache-min-ttl:") == 0)
 399         { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
 400         else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
 401             IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val);
 402             RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt;
 403         }
 404         else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl)
 405         else S_POW2("infra-cache-slabs:", infra_cache_slabs)
 406         else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts)
 407         else S_NUMBER_OR_ZERO("delay-close:", delay_close)
 408         else S_STR("chroot:", chrootdir)
 409         else S_STR("username:", username)
 410         else S_STR("directory:", directory)
 411         else S_STR("pidfile:", pidfile)
 412         else S_YNO("hide-identity:", hide_identity)
 413         else S_YNO("hide-version:", hide_version)
 414         else S_STR("identity:", identity)
 415         else S_STR("version:", version)
 416         else S_STRLIST("root-hints:", root_hints)
 417         else S_STR("target-fetch-policy:", target_fetch_policy)
 418         else S_YNO("harden-glue:", harden_glue)
 419         else S_YNO("harden-short-bufsize:", harden_short_bufsize)
 420         else S_YNO("harden-large-queries:", harden_large_queries)
 421         else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
 422         else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
 423         else S_YNO("harden-referral-path:", harden_referral_path)
 424         else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
 425         else S_YNO("use-caps-for-id", use_caps_bits_for_id)
 426         else S_STRLIST("caps-whitelist:", caps_whitelist)
 427         else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
 428         else S_STRLIST("private-address:", private_address)
 429         else S_STRLIST("private-domain:", private_domain)
 430         else S_YNO("do-not-query-localhost:", donotquery_localhost)
 431         else S_STRLIST("do-not-query-address:", donotqueryaddrs)
 432         else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list)
 433         else S_STRLIST("trust-anchor-file:", trust_anchor_file_list)
 434         else S_STRLIST("trust-anchor:", trust_anchor_list)
 435         else S_STRLIST("trusted-keys-file:", trusted_keys_file_list)
 436         else S_STR("dlv-anchor-file:", dlv_anchor_file)
 437         else S_STRLIST("dlv-anchor:", dlv_anchor_list)
 438         else S_STRLIST("domain-insecure:", domain_insecure)
 439         else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl)
 440         else S_YNO("val-clean-additional:", val_clean_additional)
 441         else S_NUMBER_OR_ZERO("val-log-level:", val_log_level)
 442         else S_YNO("val-log-squelch:", val_log_squelch)
 443         else S_YNO("log-queries:", log_queries)
 444         else S_YNO("val-permissive-mode:", val_permissive_mode)
 445         else S_YNO("ignore-cd-flag:", ignore_cd)
 446         else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
 447         else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown)
 448         else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown)
 449         else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing)
 450         else if(strcmp(opt, "permit-small-holddown:") == 0)
 451         { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0);
 452           autr_permit_small_holddown = cfg->permit_small_holddown; }
 453         else S_MEMSIZE("key-cache-size:", key_cache_size)
 454         else S_POW2("key-cache-slabs:", key_cache_slabs)
 455         else S_MEMSIZE("neg-cache-size:", neg_cache_size)
 456         else S_YNO("minimal-responses:", minimal_responses)
 457         else S_YNO("rrset-roundrobin:", rrset_roundrobin)
 458         else S_STRLIST("local-data:", local_data)
 459         else S_YNO("unblock-lan-zones:", unblock_lan_zones)
 460         else S_YNO("control-enable:", remote_control_enable)
 461         else S_STRLIST("control-interface:", control_ifs)
 462         else S_NUMBER_NONZERO("control-port:", control_port)
 463         else S_STR("server-key-file:", server_key_file)
 464         else S_STR("server-cert-file:", server_cert_file)
 465         else S_STR("control-key-file:", control_key_file)
 466         else S_STR("control-cert-file:", control_cert_file)
 467         else S_STR("module-config:", module_conf)
 468         else S_STR("python-script:", python_script)
 469         else if(strcmp(opt, "ratelimit:") == 0) {
 470             IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val);
 471             infra_dp_ratelimit=cfg->ratelimit;
 472         }
 473         else S_MEMSIZE("ratelimit-size:", ratelimit_size)
 474         else S_POW2("ratelimit-slabs:", ratelimit_slabs)
 475         else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor)
 476         /* val_sig_skew_min and max are copied into val_env during init,
 477          * so this does not update val_env with set_option */
 478         else if(strcmp(opt, "val-sig-skew-min:") == 0)
 479         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); }
 480         else if(strcmp(opt, "val-sig-skew-max:") == 0)
 481         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); }
 482         else if (strcmp(opt, "outgoing-interface:") == 0) {
 483                 char* d = strdup(val);
 484                 char** oi =
 485                 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
 486                 if(!d || !oi) { free(d); free(oi); return -1; }
 487                 if(cfg->out_ifs && cfg->num_out_ifs) {
 488                         memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*));
 489                         free(cfg->out_ifs);
 490                 }
 491                 oi[cfg->num_out_ifs++] = d;
 492                 cfg->out_ifs = oi;
 493         } else {
 494                 /* unknown or unsupported (from the set_option interface):
 495                  * interface, outgoing-interface, access-control,
 496                  * stub-zone, name, stub-addr, stub-host, stub-prime
 497                  * forward-first, stub-first,
 498                  * forward-zone, name, forward-addr, forward-host,
 499                  * ratelimit-for-domain, ratelimit-below-domain */
 500                 return 0;
 501         }
 502         return 1;
 503 }
 504
 505 void config_print_func(char* line, void* arg)
 506 {
 507         FILE* f = (FILE*)arg;
 508         (void)fprintf(f, "%s\n", line);
 509 }
 510
 511 /** collate func arg */
 512 struct config_collate_arg {
 513         /** list of result items */
 514         struct config_strlist_head list;
 515         /** if a malloc error occurred, 0 is OK */
 516         int status;
 517 };
 518
 519 void config_collate_func(char* line, void* arg)
 520 {
 521         struct config_collate_arg* m = (struct config_collate_arg*)arg;
 522         if(m->status)
 523                 return;
 524         if(!cfg_strlist_append(&m->list, strdup(line)))
 525                 m->status = 1;
 526 }
 527
 528 int config_get_option_list(struct config_file* cfg, const char* opt,
 529         struct config_strlist** list)
 530 {
 531         struct config_collate_arg m;
 532         memset(&m, 0, sizeof(m));
 533         *list = NULL;
 534         if(!config_get_option(cfg, opt, config_collate_func, &m))
 535                 return 1;
 536         if(m.status) {
 537                 config_delstrlist(m.list.first);
 538                 return 2;
 539         }
 540         *list = m.list.first;
 541         return 0;
 542 }
 543
 544 int
 545 config_get_option_collate(struct config_file* cfg, const char* opt, char** str)
 546 {
 547         struct config_strlist* list = NULL;
 548         int r;
 549         *str = NULL;
 550         if((r = config_get_option_list(cfg, opt, &list)) != 0)
 551                 return r;
 552         *str = config_collate_cat(list);
 553         config_delstrlist(list);
 554         if(!*str) return 2;
 555         return 0;
 556 }
 557
 558 char*
 559 config_collate_cat(struct config_strlist* list)
 560 {
 561         size_t total = 0, left;
 562         struct config_strlist* s;
 563         char *r, *w;
 564         if(!list) /* no elements */
 565                 return strdup("");
 566         if(list->next == NULL) /* one element , no newline at end. */
 567                 return strdup(list->str);
 568         /* count total length */
 569         for(s=list; s; s=s->next)
 570                 total += strlen(s->str) + 1; /* len + newline */
 571         left = total+1; /* one extra for nul at end */
 572         r = malloc(left);
 573         if(!r)
 574                 return NULL;
 575         w = r;
 576         for(s=list; s; s=s->next) {
 577                 size_t this = strlen(s->str);
 578                 if(this+2 > left) { /* sanity check */
 579                         free(r);
 580                         return NULL;
 581                 }
 582                 snprintf(w, left, "%s\n", s->str);
 583                 this = strlen(w);
 584                 w += this;
 585                 left -= this;
 586         }
 587         return r;
 588 }
 589
 590 /** compare and print decimal option */
 591 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \
 592         {snprintf(buf, len, "%d", (int)cfg->var); \
 593         func(buf, arg);}
 594 /** compare and print unsigned option */
 595 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \
 596         {snprintf(buf, len, "%u", (unsigned)cfg->var); \
 597         func(buf, arg);}
 598 /** compare and print yesno option */
 599 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \
 600         {func(cfg->var?"yes":"no", arg);}
 601 /** compare and print string option */
 602 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \
 603         {func(cfg->var?cfg->var:"", arg);}
 604 /** compare and print array option */
 605 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \
 606         {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);}
 607 /** compare and print memorysize option */
 608 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \
 609         if(cfg->var > 1024*1024*1024) { \
 610           size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \
 611           snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \
 612         } else snprintf(buf, len, "%u", (unsigned)cfg->var); \
 613         func(buf, arg);}
 614 /** compare and print list option */
 615 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \
 616         struct config_strlist* p = cfg->lst; \
 617         for(p = cfg->lst; p; p = p->next) \
 618                 func(p->str, arg); \
 619         }
 620 /** compare and print list option */
 621 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \
 622         struct config_str2list* p = cfg->lst; \
 623         for(p = cfg->lst; p; p = p->next) \
 624                 snprintf(buf, len, "%s %s\n", p->str, p->str2); \
 625                 func(buf, arg); \
 626         }
 627
 628 int
 629 config_get_option(struct config_file* cfg, const char* opt,
 630         void (*func)(char*,void*), void* arg)
 631 {
 632         char buf[1024];
 633         size_t len = sizeof(buf);
 634         fptr_ok(fptr_whitelist_print_func(func));
 635         O_DEC(opt, "verbosity", verbosity)
 636         else O_DEC(opt, "statistics-interval", stat_interval)
 637         else O_YNO(opt, "statistics-cumulative", stat_cumulative)
 638         else O_YNO(opt, "extended-statistics", stat_extended)
 639         else O_YNO(opt, "use-syslog", use_syslog)
 640         else O_YNO(opt, "log-time-ascii", log_time_ascii)
 641         else O_DEC(opt, "num-threads", num_threads)
 642         else O_IFC(opt, "interface", num_ifs, ifs)
 643         else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
 644         else O_YNO(opt, "interface-automatic", if_automatic)
 645         else O_DEC(opt, "port", port)
 646         else O_DEC(opt, "outgoing-range", outgoing_num_ports)
 647         else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
 648         else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
 649         else O_DEC(opt, "edns-buffer-size", edns_buffer_size)
 650         else O_DEC(opt, "msg-buffer-size", msg_buffer_size)
 651         else O_MEM(opt, "msg-cache-size", msg_cache_size)
 652         else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs)
 653         else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread)
 654         else O_UNS(opt, "jostle-timeout", jostle_time)
 655         else O_MEM(opt, "so-rcvbuf", so_rcvbuf)
 656         else O_MEM(opt, "so-sndbuf", so_sndbuf)
 657         else O_YNO(opt, "so-reuseport", so_reuseport)
 658         else O_YNO(opt, "ip-transparent", ip_transparent)
 659         else O_MEM(opt, "rrset-cache-size", rrset_cache_size)
 660         else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs)
 661         else O_YNO(opt, "prefetch-key", prefetch_key)
 662         else O_YNO(opt, "prefetch", prefetch)
 663         else O_DEC(opt, "cache-max-ttl", max_ttl)
 664         else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
 665         else O_DEC(opt, "cache-min-ttl", min_ttl)
 666         else O_DEC(opt, "infra-host-ttl", host_ttl)
 667         else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
 668         else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt)
 669         else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts)
 670         else O_UNS(opt, "delay-close", delay_close)
 671         else O_YNO(opt, "do-ip4", do_ip4)
 672         else O_YNO(opt, "do-ip6", do_ip6)
 673         else O_YNO(opt, "do-udp", do_udp)
 674         else O_YNO(opt, "do-tcp", do_tcp)
 675         else O_YNO(opt, "tcp-upstream", tcp_upstream)
 676         else O_YNO(opt, "ssl-upstream", ssl_upstream)
 677         else O_STR(opt, "ssl-service-key", ssl_service_key)
 678         else O_STR(opt, "ssl-service-pem", ssl_service_pem)
 679         else O_DEC(opt, "ssl-port", ssl_port)
 680         else O_YNO(opt, "do-daemonize", do_daemonize)
 681         else O_STR(opt, "chroot", chrootdir)
 682         else O_STR(opt, "username", username)
 683         else O_STR(opt, "directory", directory)
 684         else O_STR(opt, "logfile", logfile)
 685         else O_YNO(opt, "log-queries", log_queries)
 686         else O_STR(opt, "pidfile", pidfile)
 687         else O_YNO(opt, "hide-identity", hide_identity)
 688         else O_YNO(opt, "hide-version", hide_version)
 689         else O_STR(opt, "identity", identity)
 690         else O_STR(opt, "version", version)
 691         else O_STR(opt, "target-fetch-policy", target_fetch_policy)
 692         else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize)
 693         else O_YNO(opt, "harden-large-queries", harden_large_queries)
 694         else O_YNO(opt, "harden-glue", harden_glue)
 695         else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
 696         else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
 697         else O_YNO(opt, "harden-referral-path", harden_referral_path)
 698         else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
 699         else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
 700         else O_LST(opt, "caps-whitelist", caps_whitelist)
 701         else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
 702         else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)
 703         else O_STR(opt, "module-config", module_conf)
 704         else O_STR(opt, "dlv-anchor-file", dlv_anchor_file)
 705         else O_DEC(opt, "val-bogus-ttl", bogus_ttl)
 706         else O_YNO(opt, "val-clean-additional", val_clean_additional)
 707         else O_DEC(opt, "val-log-level", val_log_level)
 708         else O_YNO(opt, "val-permissive-mode", val_permissive_mode)
 709         else O_YNO(opt, "ignore-cd-flag", ignore_cd)
 710         else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations)
 711         else O_UNS(opt, "add-holddown", add_holddown)
 712         else O_UNS(opt, "del-holddown", del_holddown)
 713         else O_UNS(opt, "keep-missing", keep_missing)
 714         else O_YNO(opt, "permit-small-holddown", permit_small_holddown)
 715         else O_MEM(opt, "key-cache-size", key_cache_size)
 716         else O_DEC(opt, "key-cache-slabs", key_cache_slabs)
 717         else O_MEM(opt, "neg-cache-size", neg_cache_size)
 718         else O_YNO(opt, "control-enable", remote_control_enable)
 719         else O_DEC(opt, "control-port", control_port)
 720         else O_STR(opt, "server-key-file", server_key_file)
 721         else O_STR(opt, "server-cert-file", server_cert_file)
 722         else O_STR(opt, "control-key-file", control_key_file)
 723         else O_STR(opt, "control-cert-file", control_cert_file)
 724         else O_LST(opt, "root-hints", root_hints)
 725         else O_LS2(opt, "access-control", acls)
 726         else O_LST(opt, "do-not-query-address", donotqueryaddrs)
 727         else O_LST(opt, "private-address", private_address)
 728         else O_LST(opt, "private-domain", private_domain)
 729         else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list)
 730         else O_LST(opt, "trust-anchor-file", trust_anchor_file_list)
 731         else O_LST(opt, "trust-anchor", trust_anchor_list)
 732         else O_LST(opt, "trusted-keys-file", trusted_keys_file_list)
 733         else O_LST(opt, "dlv-anchor", dlv_anchor_list)
 734         else O_LST(opt, "control-interface", control_ifs)
 735         else O_LST(opt, "domain-insecure", domain_insecure)
 736         else O_UNS(opt, "val-override-date", val_date_override)
 737         else O_YNO(opt, "minimal-responses", minimal_responses)
 738         else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
 739         else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones)
 740         else O_DEC(opt, "max-udp-size", max_udp_size)
 741         else O_STR(opt, "python-script", python_script)
 742         else O_DEC(opt, "ratelimit", ratelimit)
 743         else O_MEM(opt, "ratelimit-size", ratelimit_size)
 744         else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs)
 745         else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain)
 746         else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain)
 747         else O_DEC(opt, "ratelimit-factor", ratelimit_factor)
 748         else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min)
 749         else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max)
 750         /* not here:
 751          * outgoing-permit, outgoing-avoid - have list of ports
 752          * local-zone - zones and nodefault variables
 753          * local-data - see below
 754          * local-data-ptr - converted to local-data entries
 755          * stub-zone, name, stub-addr, stub-host, stub-prime
 756          * forward-zone, name, forward-addr, forward-host
 757          */
 758         else return 0;
 759         return 1;
 760 }
 761
 762 /** initialize the global cfg_parser object */
 763 static void
 764 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
 765 {
 766         static struct config_parser_state st;
 767         cfg_parser = &st;
 768         cfg_parser->filename = filename;
 769         cfg_parser->line = 1;
 770         cfg_parser->errors = 0;
 771         cfg_parser->cfg = cfg;
 772         cfg_parser->chroot = chroot;
 773         init_cfg_parse();
 774 }
 775
 776 int
 777 config_read(struct config_file* cfg, const char* filename, const char* chroot)
 778 {
 779         FILE *in;
 780         char *fname = (char*)filename;
 781 #ifdef HAVE_GLOB
 782         glob_t g;
 783         size_t i;
 784         int r, flags;
 785 #endif
 786         if(!fname)
 787                 return 1;
 788
 789         /* check for wildcards */
 790 #ifdef HAVE_GLOB
 791         if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') &&
 792                 !strchr(fname, '{') && !strchr(fname, '~'))) {
 793                 verbose(VERB_QUERY, "wildcard found, processing %s", fname);
 794                 flags = 0
 795 #ifdef GLOB_ERR
 796                         | GLOB_ERR
 797 #endif
 798 #ifdef GLOB_NOSORT
 799                         | GLOB_NOSORT
 800 #endif
 801 #ifdef GLOB_BRACE
 802                         | GLOB_BRACE
 803 #endif
 804 #ifdef GLOB_TILDE
 805                         | GLOB_TILDE
 806 #endif
 807                 ;
 808                 memset(&g, 0, sizeof(g));
 809                 r = glob(fname, flags, NULL, &g);
 810                 if(r) {
 811                         /* some error */
 812                         globfree(&g);
 813                         if(r == GLOB_NOMATCH) {
 814                                 verbose(VERB_QUERY, "include: "
 815                                 "no matches for %s", fname);
 816                                 return 1;
 817                         } else if(r == GLOB_NOSPACE) {
 818                                 log_err("include: %s: "
 819                                         "fnametern out of memory", fname);
 820                         } else if(r == GLOB_ABORTED) {
 821                                 log_err("wildcard include: %s: expansion "
 822                                         "aborted (%s)", fname, strerror(errno));
 823                         } else {
 824                                 log_err("wildcard include: %s: expansion "
 825                                         "failed (%s)", fname, strerror(errno));
 826                         }
 827                         /* ignore globs that yield no files */
 828                         return 1;
 829                 }
 830                 /* process files found, if any */
 831                 for(i=0; i<(size_t)g.gl_pathc; i++) {
 832                         if(!config_read(cfg, g.gl_pathv[i], chroot)) {
 833                                 log_err("error reading wildcard "
 834                                         "include: %s", g.gl_pathv[i]);
 835                                 globfree(&g);
 836                                 return 0;
 837                         }
 838                 }
 839                 globfree(&g);
 840                 return 1;
 841         }
 842 #endif /* HAVE_GLOB */
 843
 844         in = fopen(fname, "r");
 845         if(!in) {
 846                 log_err("Could not open %s: %s", fname, strerror(errno));
 847                 return 0;
 848         }
 849         create_cfg_parser(cfg, fname, chroot);
 850         ub_c_in = in;
 851         ub_c_parse();
 852         fclose(in);
 853
 854         if(cfg_parser->errors != 0) {
 855                 fprintf(stderr, "read %s failed: %d errors in configuration file\n",
 856                         fname, cfg_parser->errors);
 857                 errno=EINVAL;
 858                 return 0;
 859         }
 860
 861         return 1;
 862 }
 863
 864 void
 865 config_delstrlist(struct config_strlist* p)
 866 {
 867         struct config_strlist *np;
 868         while(p) {
 869                 np = p->next;
 870                 free(p->str);
 871                 free(p);
 872                 p = np;
 873         }
 874 }
 875
 876 void
 877 config_deldblstrlist(struct config_str2list* p)
 878 {
 879         struct config_str2list *np;
 880         while(p) {
 881                 np = p->next;
 882                 free(p->str);
 883                 free(p->str2);
 884                 free(p);
 885                 p = np;
 886         }
 887 }
 888
 889 void
 890 config_delstubs(struct config_stub* p)
 891 {
 892         struct config_stub* np;
 893         while(p) {
 894                 np = p->next;
 895                 free(p->name);
 896                 config_delstrlist(p->hosts);
 897                 config_delstrlist(p->addrs);
 898                 free(p);
 899                 p = np;
 900         }
 901 }
 902
 903 void
 904 config_delete(struct config_file* cfg)
 905 {
 906         if(!cfg) return;
 907         free(cfg->username);
 908         free(cfg->chrootdir);
 909         free(cfg->directory);
 910         free(cfg->logfile);
 911         free(cfg->pidfile);
 912         free(cfg->target_fetch_policy);
 913         free(cfg->ssl_service_key);
 914         free(cfg->ssl_service_pem);
 915         if(cfg->ifs) {
 916                 int i;
 917                 for(i=0; i<cfg->num_ifs; i++)
 918                         free(cfg->ifs[i]);
 919                 free(cfg->ifs);
 920         }
 921         if(cfg->out_ifs) {
 922                 int i;
 923                 for(i=0; i<cfg->num_out_ifs; i++)
 924                         free(cfg->out_ifs[i]);
 925                 free(cfg->out_ifs);
 926         }
 927         config_delstubs(cfg->stubs);
 928         config_delstubs(cfg->forwards);
 929         config_delstrlist(cfg->donotqueryaddrs);
 930         config_delstrlist(cfg->root_hints);
 931         free(cfg->identity);
 932         free(cfg->version);
 933         free(cfg->module_conf);
 934         free(cfg->outgoing_avail_ports);
 935         config_delstrlist(cfg->caps_whitelist);
 936         config_delstrlist(cfg->private_address);
 937         config_delstrlist(cfg->private_domain);
 938         config_delstrlist(cfg->auto_trust_anchor_file_list);
 939         config_delstrlist(cfg->trust_anchor_file_list);
 940         config_delstrlist(cfg->trusted_keys_file_list);
 941         config_delstrlist(cfg->trust_anchor_list);
 942         config_delstrlist(cfg->domain_insecure);
 943         free(cfg->dlv_anchor_file);
 944         config_delstrlist(cfg->dlv_anchor_list);
 945         config_deldblstrlist(cfg->acls);
 946         free(cfg->val_nsec3_key_iterations);
 947         config_deldblstrlist(cfg->local_zones);
 948         config_delstrlist(cfg->local_zones_nodefault);
 949         config_delstrlist(cfg->local_data);
 950         config_delstrlist(cfg->control_ifs);
 951         free(cfg->server_key_file);
 952         free(cfg->server_cert_file);
 953         free(cfg->control_key_file);
 954         free(cfg->control_cert_file);
 955         free(cfg->dns64_prefix);
 956         free(cfg->dnstap_socket_path);
 957         free(cfg->dnstap_identity);
 958         free(cfg->dnstap_version);
 959         config_deldblstrlist(cfg->ratelimit_for_domain);
 960         config_deldblstrlist(cfg->ratelimit_below_domain);
 961         free(cfg);
 962 }
 963
 964 static void
 965 init_outgoing_availports(int* a, int num)
 966 {
 967         /* generated with make iana_update */
 968         const int iana_assigned[] = {
 969 #include "util/iana_ports.inc"
 970                 -1 }; /* end marker to put behind trailing comma */
 971
 972         int i;
 973         /* do not use <1024, that could be trouble with the system, privs */
 974         for(i=1024; i<num; i++) {
 975                 a[i] = i;
 976         }
 977         /* create empty spot at 49152 to keep ephemeral ports available
 978          * to other programs */
 979         for(i=49152; i<49152+256; i++)
 980                 a[i] = 0;
 981         /* pick out all the IANA assigned ports */
 982         for(i=0; iana_assigned[i]!=-1; i++) {
 983                 if(iana_assigned[i] < num)
 984                         a[iana_assigned[i]] = 0;
 985         }
 986 }
 987
 988 int
 989 cfg_mark_ports(const char* str, int allow, int* avail, int num)
 990 {
 991         char* mid = strchr(str, '-');
 992         if(!mid) {
 993                 int port = atoi(str);
 994                 if(port == 0 && strcmp(str, "0") != 0) {
 995                         log_err("cannot parse port number '%s'", str);
 996                         return 0;
 997                 }
 998                 if(port < num)
 999                         avail[port] = (allow?port:0);
1000         } else {
1001                 int i, low, high = atoi(mid+1);
1002                 char buf[16];
1003                 if(high == 0 && strcmp(mid+1, "0") != 0) {
1004                         log_err("cannot parse port number '%s'", mid+1);
1005                         return 0;
1006                 }
1007                 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) {
1008                         log_err("cannot parse port number '%s'", str);
1009                         return 0;
1010                 }
1011                 if(mid > str)
1012                         memcpy(buf, str, (size_t)(mid-str));
1013                 buf[mid-str] = 0;
1014                 low = atoi(buf);
1015                 if(low == 0 && strcmp(buf, "0") != 0) {
1016                         log_err("cannot parse port number '%s'", buf);
1017                         return 0;
1018                 }
1019                 for(i=low; i<=high; i++) {
1020                         if(i < num)
1021                                 avail[i] = (allow?i:0);
1022                 }
1023                 return 1;
1024         }
1025         return 1;
1026 }
1027
1028 int
1029 cfg_scan_ports(int* avail, int num)
1030 {
1031         int i;
1032         int count = 0;
1033         for(i=0; i<num; i++) {
1034                 if(avail[i])
1035                         count++;
1036         }
1037         return count;
1038 }
1039
1040 int cfg_condense_ports(struct config_file* cfg, int** avail)
1041 {
1042         int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536);
1043         int i, at = 0;
1044         *avail = NULL;
1045         if(num == 0)
1046                 return 0;
1047         *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int));
1048         if(!*avail)
1049                 return 0;
1050         for(i=0; i<65536; i++) {
1051                 if(cfg->outgoing_avail_ports[i])
1052                         (*avail)[at++] = cfg->outgoing_avail_ports[i];
1053         }
1054         log_assert(at == num);
1055         return num;
1056 }
1057
1058 /** print error with file and line number */
1059 static void ub_c_error_va_list(const char *fmt, va_list args)
1060 {
1061         cfg_parser->errors++;
1062         fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
1063         cfg_parser->line);
1064         vfprintf(stderr, fmt, args);
1065         fprintf(stderr, "\n");
1066 }
1067
1068 /** print error with file and line number */
1069 void ub_c_error_msg(const char* fmt, ...)
1070 {
1071         va_list args;
1072         va_start(args, fmt);
1073         ub_c_error_va_list(fmt, args);
1074         va_end(args);
1075 }
1076
1077 void ub_c_error(const char *str)
1078 {
1079         cfg_parser->errors++;
1080         fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
1081                 cfg_parser->line, str);
1082 }
1083
1084 int ub_c_wrap(void)
1085 {
1086         return 1;
1087 }
1088
1089 int cfg_strlist_append(struct config_strlist_head* list, char* item)
1090 {
1091         struct config_strlist *s;
1092         if(!item || !list)
1093                 return 0;
1094         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1095         if(!s)
1096                 return 0;
1097         s->str = item;
1098         s->next = NULL;
1099         if(list->last)
1100                 list->last->next = s;
1101         else
1102                 list->first = s;
1103         list->last = s;
1104         return 1;
1105 }
1106
1107 int
1108 cfg_strlist_insert(struct config_strlist** head, char* item)
1109 {
1110         struct config_strlist *s;
1111         if(!item || !head)
1112                 return 0;
1113         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1114         if(!s)
1115                 return 0;
1116         s->str = item;
1117         s->next = *head;
1118         *head = s;
1119         return 1;
1120 }
1121
1122 int
1123 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
1124 {
1125         struct config_str2list *s;
1126         if(!item || !i2 || !head)
1127                 return 0;
1128         s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
1129         if(!s)
1130                 return 0;
1131         s->str = item;
1132         s->str2 = i2;
1133         s->next = *head;
1134         *head = s;
1135         return 1;
1136 }
1137
1138 time_t
1139 cfg_convert_timeval(const char* str)
1140 {
1141         time_t t;
1142         struct tm tm;
1143         memset(&tm, 0, sizeof(tm));
1144         if(strlen(str) < 14)
1145                 return 0;
1146         if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
1147                 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
1148                 return 0;
1149         tm.tm_year -= 1900;
1150         tm.tm_mon--;
1151         /* Check values */
1152         if (tm.tm_year < 70)    return 0;
1153         if (tm.tm_mon < 0 || tm.tm_mon > 11)    return 0;
1154         if (tm.tm_mday < 1 || tm.tm_mday > 31)  return 0;
1155         if (tm.tm_hour < 0 || tm.tm_hour > 23)  return 0;
1156         if (tm.tm_min < 0 || tm.tm_min > 59)    return 0;
1157         if (tm.tm_sec < 0 || tm.tm_sec > 59)    return 0;
1158         /* call ldns conversion function */
1159         t = sldns_mktime_from_utc(&tm);
1160         return t;
1161 }
1162
1163 int
1164 cfg_count_numbers(const char* s)
1165 {
1166         /* format ::= (sp num)+ sp  */
1167         /* num ::= [-](0-9)+        */
1168         /* sp ::= (space|tab)*      */
1169         int num = 0;
1170         while(*s) {
1171                 while(*s && isspace((unsigned char)*s))
1172                         s++;
1173                 if(!*s) /* end of string */
1174                         break;
1175                 if(*s == '-')
1176                         s++;
1177                 if(!*s) /* only - not allowed */
1178                         return 0;
1179                 if(!isdigit((unsigned char)*s)) /* bad character */
1180                         return 0;
1181                 while(*s && isdigit((unsigned char)*s))
1182                         s++;
1183                 num++;
1184         }
1185         return num;
1186 }
1187
1188 /** all digit number */
1189 static int isalldigit(const char* str, size_t l)
1190 {
1191         size_t i;
1192         for(i=0; i<l; i++)
1193                 if(!isdigit((unsigned char)str[i]))
1194                         return 0;
1195         return 1;
1196 }
1197
1198 int
1199 cfg_parse_memsize(const char* str, size_t* res)
1200 {
1201         size_t len;
1202         size_t mult = 1;
1203         if(!str || (len=(size_t)strlen(str)) == 0) {
1204                 log_err("not a size: '%s'", str);
1205                 return 0;
1206         }
1207         if(isalldigit(str, len)) {
1208                 *res = (size_t)atol(str);
1209                 return 1;
1210         }
1211         /* check appended num */
1212         while(len>0 && str[len-1]==' ')
1213                 len--;
1214         if(len > 1 && str[len-1] == 'b')
1215                 len--;
1216         else if(len > 1 && str[len-1] == 'B')
1217                 len--;
1218
1219         if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
1220                 mult = 1024*1024*1024;
1221         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
1222                 mult = 1024*1024;
1223         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k')
1224                 mult = 1024;
1225         else if(len > 0 && isdigit((unsigned char)str[len-1]))
1226                 mult = 1;
1227         else {
1228                 log_err("unknown size specifier: '%s'", str);
1229                 return 0;
1230         }
1231         while(len>1 && str[len-2]==' ')
1232                 len--;
1233
1234         if(!isalldigit(str, len-1)) {
1235                 log_err("unknown size specifier: '%s'", str);
1236                 return 0;
1237         }
1238         *res = ((size_t)atol(str)) * mult;
1239         return 1;
1240 }
1241
1242 void
1243 config_apply(struct config_file* config)
1244 {
1245         MAX_TTL = (time_t)config->max_ttl;
1246         MIN_TTL = (time_t)config->min_ttl;
1247         MAX_NEG_TTL = (time_t)config->max_negative_ttl;
1248         RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
1249         EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
1250         MINIMAL_RESPONSES = config->minimal_responses;
1251         RRSET_ROUNDROBIN = config->rrset_roundrobin;
1252         log_set_time_asc(config->log_time_ascii);
1253         autr_permit_small_holddown = config->permit_small_holddown;
1254 }
1255
1256 void config_lookup_uid(struct config_file* cfg)
1257 {
1258 #ifdef HAVE_GETPWNAM
1259         /* translate username into uid and gid */
1260         if(cfg->username && cfg->username[0]) {
1261                 struct passwd *pwd;
1262                 if((pwd = getpwnam(cfg->username)) != NULL) {
1263                         cfg_uid = pwd->pw_uid;
1264                         cfg_gid = pwd->pw_gid;
1265                 }
1266         }
1267 #else
1268         (void)cfg;
1269 #endif
1270 }
1271
1272 /**
1273  * Calculate string length of full pathname in original filesys
1274  * @param fname: the path name to convert.
1275  *      Must not be null or empty.
1276  * @param cfg: config struct for chroot and chdir (if set).
1277  * @param use_chdir: if false, only chroot is applied.
1278  * @return length of string.
1279  *      remember to allocate one more for 0 at end in mallocs.
1280  */
1281 static size_t
1282 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
1283 {
1284         size_t len = 0;
1285         int slashit = 0;
1286         if(cfg->chrootdir && cfg->chrootdir[0] &&
1287                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
1288                 /* already full pathname, return it */
1289                 return strlen(fname);
1290         }
1291         /* chroot */
1292         if(cfg->chrootdir && cfg->chrootdir[0]) {
1293                 /* start with chrootdir */
1294                 len += strlen(cfg->chrootdir);
1295                 slashit = 1;
1296         }
1297         /* chdir */
1298 #ifdef UB_ON_WINDOWS
1299         if(fname[0] != 0 && fname[1] == ':') {
1300                 /* full path, no chdir */
1301         } else
1302 #endif
1303         if(fname[0] == '/' || !use_chdir) {
1304                 /* full path, no chdir */
1305         } else if(cfg->directory && cfg->directory[0]) {
1306                 /* prepend chdir */
1307                 if(slashit && cfg->directory[0] != '/')
1308                         len++;
1309                 if(cfg->chrootdir && cfg->chrootdir[0] &&
1310                         strncmp(cfg->chrootdir, cfg->directory,
1311                         strlen(cfg->chrootdir)) == 0)
1312                         len += strlen(cfg->directory)-strlen(cfg->chrootdir);
1313                 else    len += strlen(cfg->directory);
1314                 slashit = 1;
1315         }
1316         /* fname */
1317         if(slashit && fname[0] != '/')
1318                 len++;
1319         len += strlen(fname);
1320         return len;
1321 }
1322
1323 char*
1324 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
1325 {
1326         size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1;
1327         int slashit = 0;
1328         char* buf = (char*)malloc(len);
1329         if(!buf)
1330                 return NULL;
1331         buf[0] = 0;
1332         /* is fname already in chroot ? */
1333         if(cfg->chrootdir && cfg->chrootdir[0] &&
1334                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
1335                 /* already full pathname, return it */
1336                 (void)strlcpy(buf, fname, len);
1337                 buf[len-1] = 0;
1338                 return buf;
1339         }
1340         /* chroot */
1341         if(cfg->chrootdir && cfg->chrootdir[0]) {
1342                 /* start with chrootdir */
1343                 (void)strlcpy(buf, cfg->chrootdir, len);
1344                 slashit = 1;
1345         }
1346 #ifdef UB_ON_WINDOWS
1347         if(fname[0] != 0 && fname[1] == ':') {
1348                 /* full path, no chdir */
1349         } else
1350 #endif
1351         /* chdir */
1352         if(fname[0] == '/' || !use_chdir) {
1353                 /* full path, no chdir */
1354         } else if(cfg->directory && cfg->directory[0]) {
1355                 /* prepend chdir */
1356                 if(slashit && cfg->directory[0] != '/')
1357                         (void)strlcat(buf, "/", len);
1358                 /* is the directory already in the chroot? */
1359                 if(cfg->chrootdir && cfg->chrootdir[0] &&
1360                         strncmp(cfg->chrootdir, cfg->directory,
1361                         strlen(cfg->chrootdir)) == 0)
1362                         (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
1363                                    len);
1364                 else (void)strlcat(buf, cfg->directory, len);
1365                 slashit = 1;
1366         }
1367         /* fname */
1368         if(slashit && fname[0] != '/')
1369                 (void)strlcat(buf, "/", len);
1370         (void)strlcat(buf, fname, len);
1371         buf[len-1] = 0;
1372         return buf;
1373 }
1374
1375 /** return next space character in string */
1376 static char* next_space_pos(const char* str)
1377 {
1378         char* sp = strchr(str, ' ');
1379         char* tab = strchr(str, '\t');
1380         if(!tab && !sp)
1381                 return NULL;
1382         if(!sp) return tab;
1383         if(!tab) return sp;
1384         return (sp<tab)?sp:tab;
1385 }
1386
1387 /** return last space character in string */
1388 static char* last_space_pos(const char* str)
1389 {
1390         char* sp = strrchr(str, ' ');
1391         char* tab = strrchr(str, '\t');
1392         if(!tab && !sp)
1393                 return NULL;
1394         if(!sp) return tab;
1395         if(!tab) return sp;
1396         return (sp>tab)?sp:tab;
1397 }
1398
1399 int
1400 cfg_parse_local_zone(struct config_file* cfg, const char* val)
1401 {
1402         const char *type, *name_end, *name;
1403         char buf[256];
1404
1405         /* parse it as: [zone_name] [between stuff] [zone_type] */
1406         name = val;
1407         while(*name && isspace((unsigned char)*name))
1408                 name++;
1409         if(!*name) {
1410                 log_err("syntax error: too short: %s", val);
1411                 return 0;
1412         }
1413         name_end = next_space_pos(name);
1414         if(!name_end || !*name_end) {
1415                 log_err("syntax error: expected zone type: %s", val);
1416                 return 0;
1417         }
1418         if (name_end - name > 255) {
1419                 log_err("syntax error: bad zone name: %s", val);
1420                 return 0;
1421         }
1422         (void)strlcpy(buf, name, sizeof(buf));
1423         buf[name_end-name] = '\0';
1424
1425         type = last_space_pos(name_end);
1426         while(type && *type && isspace((unsigned char)*type))
1427                 type++;
1428         if(!type || !*type) {
1429                 log_err("syntax error: expected zone type: %s", val);
1430                 return 0;
1431         }
1432
1433         if(strcmp(type, "nodefault")==0) {
1434                 return cfg_strlist_insert(&cfg->local_zones_nodefault,
1435                         strdup(name));
1436         } else {
1437                 return cfg_str2list_insert(&cfg->local_zones, strdup(buf),
1438                         strdup(type));
1439         }
1440 }
1441
1442 char* cfg_ptr_reverse(char* str)
1443 {
1444         char* ip, *ip_end;
1445         char* name;
1446         char* result;
1447         char buf[1024];
1448         struct sockaddr_storage addr;
1449         socklen_t addrlen;
1450
1451         /* parse it as: [IP] [between stuff] [name] */
1452         ip = str;
1453         while(*ip && isspace((unsigned char)*ip))
1454                 ip++;
1455         if(!*ip) {
1456                 log_err("syntax error: too short: %s", str);
1457                 return NULL;
1458         }
1459         ip_end = next_space_pos(ip);
1460         if(!ip_end || !*ip_end) {
1461                 log_err("syntax error: expected name: %s", str);
1462                 return NULL;
1463         }
1464
1465         name = last_space_pos(ip_end);
1466         if(!name || !*name) {
1467                 log_err("syntax error: expected name: %s", str);
1468                 return NULL;
1469         }
1470
1471         sscanf(ip, "%100s", buf);
1472         buf[sizeof(buf)-1]=0;
1473
1474         if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) {
1475                 log_err("syntax error: cannot parse address: %s", str);
1476                 return NULL;
1477         }
1478
1479         /* reverse IPv4:
1480          * ddd.ddd.ddd.ddd.in-addr-arpa.
1481          * IPv6: (h.){32}.ip6.arpa.  */
1482
1483         if(addr_is_ip6(&addr, addrlen)) {
1484                 uint8_t ad[16];
1485                 const char* hex = "0123456789abcdef";
1486                 char *p = buf;
1487                 int i;
1488                 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
1489                         sizeof(ad));
1490                 for(i=15; i>=0; i--) {
1491                         uint8_t b = ad[i];
1492                         *p++ = hex[ (b&0x0f) ];
1493                         *p++ = '.';
1494                         *p++ = hex[ (b&0xf0) >> 4 ];
1495                         *p++ = '.';
1496                 }
1497                 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
1498         } else {
1499                 uint8_t ad[4];
1500                 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
1501                         sizeof(ad));
1502                 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
1503                         (unsigned)ad[3], (unsigned)ad[2],
1504                         (unsigned)ad[1], (unsigned)ad[0]);
1505         }
1506
1507         /* printed the reverse address, now the between goop and name on end */
1508         while(*ip_end && isspace((unsigned char)*ip_end))
1509                 ip_end++;
1510         if(name>ip_end) {
1511                 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s",
1512                         (int)(name-ip_end), ip_end);
1513         }
1514         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name);
1515
1516         result = strdup(buf);
1517         if(!result) {
1518                 log_err("out of memory parsing %s", str);
1519                 return NULL;
1520         }
1521         return result;
1522 }
1523
1524 #ifdef UB_ON_WINDOWS
1525 char*
1526 w_lookup_reg_str(const char* key, const char* name)
1527 {
1528         HKEY hk = NULL;
1529         DWORD type = 0;
1530         BYTE buf[1024];
1531         DWORD len = (DWORD)sizeof(buf);
1532         LONG ret;
1533         char* result = NULL;
1534         ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
1535         if(ret == ERROR_FILE_NOT_FOUND)
1536                 return NULL; /* key does not exist */
1537         else if(ret != ERROR_SUCCESS) {
1538                 log_err("RegOpenKeyEx failed");
1539                 return NULL;
1540         }
1541         ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
1542         if(RegCloseKey(hk))
1543                 log_err("RegCloseKey");
1544         if(ret == ERROR_FILE_NOT_FOUND)
1545                 return NULL; /* name does not exist */
1546         else if(ret != ERROR_SUCCESS) {
1547                 log_err("RegQueryValueEx failed");
1548                 return NULL;
1549         }
1550         if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
1551                 buf[sizeof(buf)-1] = 0;
1552                 buf[sizeof(buf)-2] = 0; /* for multi_sz */
1553                 result = strdup((char*)buf);
1554                 if(!result) log_err("out of memory");
1555         }
1556         return result;
1557 }
1558 #endif /* UB_ON_WINDOWS */
1559
1560 void errinf(struct module_qstate* qstate, const char* str)
1561 {
1562         struct config_strlist* p;
1563         if(qstate->env->cfg->val_log_level < 2 || !str)
1564                 return;
1565         p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p));
1566         if(!p) {
1567                 log_err("malloc failure in validator-error-info string");
1568                 return;
1569         }
1570         p->next = NULL;
1571         p->str = regional_strdup(qstate->region, str);
1572         if(!p->str) {
1573                 log_err("malloc failure in validator-error-info string");
1574                 return;
1575         }
1576         /* add at end */
1577         if(qstate->errinf) {
1578                 struct config_strlist* q = qstate->errinf;
1579                 while(q->next)
1580                         q = q->next;
1581                 q->next = p;
1582         } else  qstate->errinf = p;
1583 }
1584
1585 void errinf_origin(struct module_qstate* qstate, struct sock_list *origin)
1586 {
1587         struct sock_list* p;
1588         if(qstate->env->cfg->val_log_level < 2)
1589                 return;
1590         for(p=origin; p; p=p->next) {
1591                 char buf[256];
1592                 if(p == origin)
1593                         snprintf(buf, sizeof(buf), "from ");
1594                 else    snprintf(buf, sizeof(buf), "and ");
1595                 if(p->len == 0)
1596                         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf),
1597                                 "cache");
1598                 else
1599                         addr_to_str(&p->addr, p->len, buf+strlen(buf),
1600                                 sizeof(buf)-strlen(buf));
1601                 errinf(qstate, buf);
1602         }
1603 }
1604
1605 char* errinf_to_str(struct module_qstate* qstate)
1606 {
1607         char buf[20480];
1608         char* p = buf;
1609         size_t left = sizeof(buf);
1610         struct config_strlist* s;
1611         char dname[LDNS_MAX_DOMAINLEN+1];
1612         char t[16], c[16];
1613         sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t));
1614         sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c));
1615         dname_str(qstate->qinfo.qname, dname);
1616         snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c);
1617         left -= strlen(p); p += strlen(p);
1618         if(!qstate->errinf)
1619                 snprintf(p, left, " misc failure");
1620         else for(s=qstate->errinf; s; s=s->next) {
1621                 snprintf(p, left, " %s", s->str);
1622                 left -= strlen(p); p += strlen(p);
1623         }
1624         p = strdup(buf);
1625         if(!p)
1626                 log_err("malloc failure in errinf_to_str");
1627         return p;
1628 }
1629
1630 void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr)
1631 {
1632         char buf[1024];
1633         char dname[LDNS_MAX_DOMAINLEN+1];
1634         char t[16], c[16];
1635         if(qstate->env->cfg->val_log_level < 2 || !rr)
1636                 return;
1637         sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t));
1638         sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c));
1639         dname_str(rr->rk.dname, dname);
1640         snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c);
1641         errinf(qstate, buf);
1642 }
1643
1644 void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname)
1645 {
1646         char b[1024];
1647         char buf[LDNS_MAX_DOMAINLEN+1];
1648         if(qstate->env->cfg->val_log_level < 2 || !str || !dname)
1649                 return;
1650         dname_str(dname, buf);
1651         snprintf(b, sizeof(b), "%s %s", str, buf);
1652         errinf(qstate, b);
1653 }