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 = 853;
 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->insecure_lan_zones = 0;
 214         cfg->python_script = NULL;
 215         cfg->remote_control_enable = 0;
 216         cfg->control_ifs = NULL;
 217         cfg->control_port = UNBOUND_CONTROL_PORT;
 218         cfg->remote_control_use_cert = 1;
 219         cfg->minimal_responses = 0;
 220         cfg->rrset_roundrobin = 0;
 221         cfg->max_udp_size = 4096;
 222         if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
 223                 goto error_exit;
 224         if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
 225                 goto error_exit;
 226         if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
 227                 goto error_exit;
 228         if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
 229                 goto error_exit;
 230
 231         if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
 232         if(!(cfg->val_nsec3_key_iterations =
 233                 strdup("1024 150 2048 500 4096 2500"))) goto error_exit;
 234 #if defined(DNSTAP_SOCKET_PATH)
 235         if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
 236                 goto error_exit;
 237 #endif
 238         cfg->ratelimit = 0;
 239         cfg->ratelimit_slabs = 4;
 240         cfg->ratelimit_size = 4*1024*1024;
 241         cfg->ratelimit_for_domain = NULL;
 242         cfg->ratelimit_below_domain = NULL;
 243         cfg->ratelimit_factor = 10;
 244         cfg->qname_minimisation = 0;
 245         return cfg;
 246 error_exit:
 247         config_delete(cfg);
 248         return NULL;
 249 }
 250
 251 struct config_file* config_create_forlib(void)
 252 {
 253         struct config_file* cfg = config_create();
 254         if(!cfg) return NULL;
 255         /* modifications for library use, less verbose, less memory */
 256         free(cfg->chrootdir);
 257         cfg->chrootdir = NULL;
 258         cfg->verbosity = 0;
 259         cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable'
 260                 and probably within the ulimit(maxfds) of the user */
 261         cfg->outgoing_num_tcp = 2;
 262         cfg->msg_cache_size = 1024*1024;
 263         cfg->msg_cache_slabs = 1;
 264         cfg->rrset_cache_size = 1024*1024;
 265         cfg->rrset_cache_slabs = 1;
 266         cfg->infra_cache_slabs = 1;
 267         cfg->use_syslog = 0;
 268         cfg->key_cache_size = 1024*1024;
 269         cfg->key_cache_slabs = 1;
 270         cfg->neg_cache_size = 100 * 1024;
 271         cfg->donotquery_localhost = 0; /* allow, so that you can ask a
 272                 forward nameserver running on localhost */
 273         cfg->val_log_level = 2; /* to fill why_bogus with */
 274         cfg->val_log_squelch = 1;
 275         return cfg;
 276 }
 277
 278 /** check that the value passed is >= 0 */
 279 #define IS_NUMBER_OR_ZERO \
 280         if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0
 281 /** check that the value passed is > 0 */
 282 #define IS_NONZERO_NUMBER \
 283         if(atoi(val) == 0) return 0
 284 /** check that the value passed is not 0 and a power of 2 */
 285 #define IS_POW2_NUMBER \
 286         if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0
 287 /** check that the value passed is yes or no */
 288 #define IS_YES_OR_NO \
 289         if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0
 290 /** put integer_or_zero into variable */
 291 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 292         { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); }
 293 /** put integer_nonzero into variable */
 294 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 295         { IS_NONZERO_NUMBER; cfg->var = atoi(val); }
 296 /** put integer_or_zero into unsigned */
 297 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 298         { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); }
 299 /** put integer_or_zero into size_t */
 300 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 301         { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); }
 302 /** put integer_nonzero into size_t */
 303 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 304         { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); }
 305 /** put yesno into variable */
 306 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \
 307         { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); }
 308 /** put memsize into variable */
 309 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \
 310         { return cfg_parse_memsize(val, &cfg->var); }
 311 /** put pow2 number into variable */
 312 #define S_POW2(str, var) if(strcmp(opt, str)==0) \
 313         { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); }
 314 /** put string into variable */
 315 #define S_STR(str, var) if(strcmp(opt, str)==0) \
 316         { free(cfg->var); return (cfg->var = strdup(val)) != NULL; }
 317 /** put string into strlist */
 318 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \
 319         { return cfg_strlist_insert(&cfg->var, strdup(val)); }
 320
 321 int config_set_option(struct config_file* cfg, const char* opt,
 322         const char* val)
 323 {
 324         S_NUMBER_OR_ZERO("verbosity:", verbosity)
 325         else if(strcmp(opt, "statistics-interval:") == 0) {
 326                 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
 327                         cfg->stat_interval = 0;
 328                 else if(atoi(val) == 0)
 329                         return 0;
 330                 else cfg->stat_interval = atoi(val);
 331         } else if(strcmp(opt, "num_threads:") == 0) {
 332                 /* not supported, library must have 1 thread in bgworker */
 333                 return 0;
 334         } else if(strcmp(opt, "outgoing-port-permit:") == 0) {
 335                 return cfg_mark_ports(val, 1,
 336                         cfg->outgoing_avail_ports, 65536);
 337         } else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
 338                 return cfg_mark_ports(val, 0,
 339                         cfg->outgoing_avail_ports, 65536);
 340         } else if(strcmp(opt, "local-zone:") == 0) {
 341                 return cfg_parse_local_zone(cfg, val);
 342         } else if(strcmp(opt, "val-override-date:") == 0) {
 343                 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) {
 344                         cfg->val_date_override = 0;
 345                 } else if(strlen(val) == 14) {
 346                         cfg->val_date_override = cfg_convert_timeval(val);
 347                         return cfg->val_date_override != 0;
 348                 } else {
 349                         if(atoi(val) == 0) return 0;
 350                         cfg->val_date_override = (uint32_t)atoi(val);
 351                 }
 352         } else if(strcmp(opt, "local-data-ptr:") == 0) {
 353                 char* ptr = cfg_ptr_reverse((char*)opt);
 354                 return cfg_strlist_insert(&cfg->local_data, ptr);
 355         } else if(strcmp(opt, "logfile:") == 0) {
 356                 cfg->use_syslog = 0;
 357                 free(cfg->logfile);
 358                 return (cfg->logfile = strdup(val)) != NULL;
 359         }
 360         else if(strcmp(opt, "log-time-ascii:") == 0)
 361         { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0);
 362           log_set_time_asc(cfg->log_time_ascii); }
 363         else S_SIZET_NONZERO("max-udp-size:", max_udp_size)
 364         else S_YNO("use-syslog:", use_syslog)
 365         else S_YNO("extended-statistics:", stat_extended)
 366         else S_YNO("statistics-cumulative:", stat_cumulative)
 367         else S_YNO("do-ip4:", do_ip4)
 368         else S_YNO("do-ip6:", do_ip6)
 369         else S_YNO("do-udp:", do_udp)
 370         else S_YNO("do-tcp:", do_tcp)
 371         else S_YNO("tcp-upstream:", tcp_upstream)
 372         else S_YNO("ssl-upstream:", ssl_upstream)
 373         else S_STR("ssl-service-key:", ssl_service_key)
 374         else S_STR("ssl-service-pem:", ssl_service_pem)
 375         else S_NUMBER_NONZERO("ssl-port:", ssl_port)
 376         else S_YNO("interface-automatic:", if_automatic)
 377         else S_YNO("do-daemonize:", do_daemonize)
 378         else S_NUMBER_NONZERO("port:", port)
 379         else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports)
 380         else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp)
 381         else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp)
 382         else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size)
 383         else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size)
 384         else S_MEMSIZE("msg-cache-size:", msg_cache_size)
 385         else S_POW2("msg-cache-slabs:", msg_cache_slabs)
 386         else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread)
 387         else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time)
 388         else S_MEMSIZE("so-rcvbuf:", so_rcvbuf)
 389         else S_MEMSIZE("so-sndbuf:", so_sndbuf)
 390         else S_YNO("so-reuseport:", so_reuseport)
 391         else S_YNO("ip-transparent:", ip_transparent)
 392         else S_MEMSIZE("rrset-cache-size:", rrset_cache_size)
 393         else S_POW2("rrset-cache-slabs:", rrset_cache_slabs)
 394         else S_YNO("prefetch:", prefetch)
 395         else S_YNO("prefetch-key:", prefetch_key)
 396         else if(strcmp(opt, "cache-max-ttl:") == 0)
 397         { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
 398         else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
 399         { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
 400         else if(strcmp(opt, "cache-min-ttl:") == 0)
 401         { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
 402         else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
 403             IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val);
 404             RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt;
 405         }
 406         else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl)
 407         else S_POW2("infra-cache-slabs:", infra_cache_slabs)
 408         else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts)
 409         else S_NUMBER_OR_ZERO("delay-close:", delay_close)
 410         else S_STR("chroot:", chrootdir)
 411         else S_STR("username:", username)
 412         else S_STR("directory:", directory)
 413         else S_STR("pidfile:", pidfile)
 414         else S_YNO("hide-identity:", hide_identity)
 415         else S_YNO("hide-version:", hide_version)
 416         else S_STR("identity:", identity)
 417         else S_STR("version:", version)
 418         else S_STRLIST("root-hints:", root_hints)
 419         else S_STR("target-fetch-policy:", target_fetch_policy)
 420         else S_YNO("harden-glue:", harden_glue)
 421         else S_YNO("harden-short-bufsize:", harden_short_bufsize)
 422         else S_YNO("harden-large-queries:", harden_large_queries)
 423         else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
 424         else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
 425         else S_YNO("harden-referral-path:", harden_referral_path)
 426         else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
 427         else S_YNO("use-caps-for-id", use_caps_bits_for_id)
 428         else S_STRLIST("caps-whitelist:", caps_whitelist)
 429         else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
 430         else S_STRLIST("private-address:", private_address)
 431         else S_STRLIST("private-domain:", private_domain)
 432         else S_YNO("do-not-query-localhost:", donotquery_localhost)
 433         else S_STRLIST("do-not-query-address:", donotqueryaddrs)
 434         else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list)
 435         else S_STRLIST("trust-anchor-file:", trust_anchor_file_list)
 436         else S_STRLIST("trust-anchor:", trust_anchor_list)
 437         else S_STRLIST("trusted-keys-file:", trusted_keys_file_list)
 438         else S_STR("dlv-anchor-file:", dlv_anchor_file)
 439         else S_STRLIST("dlv-anchor:", dlv_anchor_list)
 440         else S_STRLIST("domain-insecure:", domain_insecure)
 441         else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl)
 442         else S_YNO("val-clean-additional:", val_clean_additional)
 443         else S_NUMBER_OR_ZERO("val-log-level:", val_log_level)
 444         else S_YNO("val-log-squelch:", val_log_squelch)
 445         else S_YNO("log-queries:", log_queries)
 446         else S_YNO("val-permissive-mode:", val_permissive_mode)
 447         else S_YNO("ignore-cd-flag:", ignore_cd)
 448         else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
 449         else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown)
 450         else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown)
 451         else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing)
 452         else if(strcmp(opt, "permit-small-holddown:") == 0)
 453         { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0);
 454           autr_permit_small_holddown = cfg->permit_small_holddown; }
 455         else S_MEMSIZE("key-cache-size:", key_cache_size)
 456         else S_POW2("key-cache-slabs:", key_cache_slabs)
 457         else S_MEMSIZE("neg-cache-size:", neg_cache_size)
 458         else S_YNO("minimal-responses:", minimal_responses)
 459         else S_YNO("rrset-roundrobin:", rrset_roundrobin)
 460         else S_STRLIST("local-data:", local_data)
 461         else S_YNO("unblock-lan-zones:", unblock_lan_zones)
 462         else S_YNO("insecure-lan-zones:", insecure_lan_zones)
 463         else S_YNO("control-enable:", remote_control_enable)
 464         else S_STRLIST("control-interface:", control_ifs)
 465         else S_NUMBER_NONZERO("control-port:", control_port)
 466         else S_STR("server-key-file:", server_key_file)
 467         else S_STR("server-cert-file:", server_cert_file)
 468         else S_STR("control-key-file:", control_key_file)
 469         else S_STR("control-cert-file:", control_cert_file)
 470         else S_STR("module-config:", module_conf)
 471         else S_STR("python-script:", python_script)
 472         else if(strcmp(opt, "ratelimit:") == 0) {
 473             IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val);
 474             infra_dp_ratelimit=cfg->ratelimit;
 475         }
 476         else S_MEMSIZE("ratelimit-size:", ratelimit_size)
 477         else S_POW2("ratelimit-slabs:", ratelimit_slabs)
 478         else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor)
 479         else S_YNO("qname-minimisation:", qname_minimisation)
 480         /* val_sig_skew_min and max are copied into val_env during init,
 481          * so this does not update val_env with set_option */
 482         else if(strcmp(opt, "val-sig-skew-min:") == 0)
 483         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); }
 484         else if(strcmp(opt, "val-sig-skew-max:") == 0)
 485         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); }
 486         else if (strcmp(opt, "outgoing-interface:") == 0) {
 487                 char* d = strdup(val);
 488                 char** oi =
 489                 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
 490                 if(!d || !oi) { free(d); free(oi); return -1; }
 491                 if(cfg->out_ifs && cfg->num_out_ifs) {
 492                         memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*));
 493                         free(cfg->out_ifs);
 494                 }
 495                 oi[cfg->num_out_ifs++] = d;
 496                 cfg->out_ifs = oi;
 497         } else {
 498                 /* unknown or unsupported (from the set_option interface):
 499                  * interface, outgoing-interface, access-control,
 500                  * stub-zone, name, stub-addr, stub-host, stub-prime
 501                  * forward-first, stub-first,
 502                  * forward-zone, name, forward-addr, forward-host,
 503                  * ratelimit-for-domain, ratelimit-below-domain */
 504                 return 0;
 505         }
 506         return 1;
 507 }
 508
 509 void config_print_func(char* line, void* arg)
 510 {
 511         FILE* f = (FILE*)arg;
 512         (void)fprintf(f, "%s\n", line);
 513 }
 514
 515 /** collate func arg */
 516 struct config_collate_arg {
 517         /** list of result items */
 518         struct config_strlist_head list;
 519         /** if a malloc error occurred, 0 is OK */
 520         int status;
 521 };
 522
 523 void config_collate_func(char* line, void* arg)
 524 {
 525         struct config_collate_arg* m = (struct config_collate_arg*)arg;
 526         if(m->status)
 527                 return;
 528         if(!cfg_strlist_append(&m->list, strdup(line)))
 529                 m->status = 1;
 530 }
 531
 532 int config_get_option_list(struct config_file* cfg, const char* opt,
 533         struct config_strlist** list)
 534 {
 535         struct config_collate_arg m;
 536         memset(&m, 0, sizeof(m));
 537         *list = NULL;
 538         if(!config_get_option(cfg, opt, config_collate_func, &m))
 539                 return 1;
 540         if(m.status) {
 541                 config_delstrlist(m.list.first);
 542                 return 2;
 543         }
 544         *list = m.list.first;
 545         return 0;
 546 }
 547
 548 int
 549 config_get_option_collate(struct config_file* cfg, const char* opt, char** str)
 550 {
 551         struct config_strlist* list = NULL;
 552         int r;
 553         *str = NULL;
 554         if((r = config_get_option_list(cfg, opt, &list)) != 0)
 555                 return r;
 556         *str = config_collate_cat(list);
 557         config_delstrlist(list);
 558         if(!*str) return 2;
 559         return 0;
 560 }
 561
 562 char*
 563 config_collate_cat(struct config_strlist* list)
 564 {
 565         size_t total = 0, left;
 566         struct config_strlist* s;
 567         char *r, *w;
 568         if(!list) /* no elements */
 569                 return strdup("");
 570         if(list->next == NULL) /* one element , no newline at end. */
 571                 return strdup(list->str);
 572         /* count total length */
 573         for(s=list; s; s=s->next)
 574                 total += strlen(s->str) + 1; /* len + newline */
 575         left = total+1; /* one extra for nul at end */
 576         r = malloc(left);
 577         if(!r)
 578                 return NULL;
 579         w = r;
 580         for(s=list; s; s=s->next) {
 581                 size_t this = strlen(s->str);
 582                 if(this+2 > left) { /* sanity check */
 583                         free(r);
 584                         return NULL;
 585                 }
 586                 snprintf(w, left, "%s\n", s->str);
 587                 this = strlen(w);
 588                 w += this;
 589                 left -= this;
 590         }
 591         return r;
 592 }
 593
 594 /** compare and print decimal option */
 595 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \
 596         {snprintf(buf, len, "%d", (int)cfg->var); \
 597         func(buf, arg);}
 598 /** compare and print unsigned option */
 599 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \
 600         {snprintf(buf, len, "%u", (unsigned)cfg->var); \
 601         func(buf, arg);}
 602 /** compare and print yesno option */
 603 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \
 604         {func(cfg->var?"yes":"no", arg);}
 605 /** compare and print string option */
 606 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \
 607         {func(cfg->var?cfg->var:"", arg);}
 608 /** compare and print array option */
 609 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \
 610         {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);}
 611 /** compare and print memorysize option */
 612 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \
 613         if(cfg->var > 1024*1024*1024) { \
 614           size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \
 615           snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \
 616         } else snprintf(buf, len, "%u", (unsigned)cfg->var); \
 617         func(buf, arg);}
 618 /** compare and print list option */
 619 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \
 620         struct config_strlist* p = cfg->lst; \
 621         for(p = cfg->lst; p; p = p->next) \
 622                 func(p->str, arg); \
 623         }
 624 /** compare and print list option */
 625 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \
 626         struct config_str2list* p = cfg->lst; \
 627         for(p = cfg->lst; p; p = p->next) \
 628                 snprintf(buf, len, "%s %s\n", p->str, p->str2); \
 629                 func(buf, arg); \
 630         }
 631
 632 int
 633 config_get_option(struct config_file* cfg, const char* opt,
 634         void (*func)(char*,void*), void* arg)
 635 {
 636         char buf[1024];
 637         size_t len = sizeof(buf);
 638         fptr_ok(fptr_whitelist_print_func(func));
 639         O_DEC(opt, "verbosity", verbosity)
 640         else O_DEC(opt, "statistics-interval", stat_interval)
 641         else O_YNO(opt, "statistics-cumulative", stat_cumulative)
 642         else O_YNO(opt, "extended-statistics", stat_extended)
 643         else O_YNO(opt, "use-syslog", use_syslog)
 644         else O_YNO(opt, "log-time-ascii", log_time_ascii)
 645         else O_DEC(opt, "num-threads", num_threads)
 646         else O_IFC(opt, "interface", num_ifs, ifs)
 647         else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
 648         else O_YNO(opt, "interface-automatic", if_automatic)
 649         else O_DEC(opt, "port", port)
 650         else O_DEC(opt, "outgoing-range", outgoing_num_ports)
 651         else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
 652         else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
 653         else O_DEC(opt, "edns-buffer-size", edns_buffer_size)
 654         else O_DEC(opt, "msg-buffer-size", msg_buffer_size)
 655         else O_MEM(opt, "msg-cache-size", msg_cache_size)
 656         else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs)
 657         else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread)
 658         else O_UNS(opt, "jostle-timeout", jostle_time)
 659         else O_MEM(opt, "so-rcvbuf", so_rcvbuf)
 660         else O_MEM(opt, "so-sndbuf", so_sndbuf)
 661         else O_YNO(opt, "so-reuseport", so_reuseport)
 662         else O_YNO(opt, "ip-transparent", ip_transparent)
 663         else O_MEM(opt, "rrset-cache-size", rrset_cache_size)
 664         else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs)
 665         else O_YNO(opt, "prefetch-key", prefetch_key)
 666         else O_YNO(opt, "prefetch", prefetch)
 667         else O_DEC(opt, "cache-max-ttl", max_ttl)
 668         else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
 669         else O_DEC(opt, "cache-min-ttl", min_ttl)
 670         else O_DEC(opt, "infra-host-ttl", host_ttl)
 671         else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
 672         else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt)
 673         else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts)
 674         else O_UNS(opt, "delay-close", delay_close)
 675         else O_YNO(opt, "do-ip4", do_ip4)
 676         else O_YNO(opt, "do-ip6", do_ip6)
 677         else O_YNO(opt, "do-udp", do_udp)
 678         else O_YNO(opt, "do-tcp", do_tcp)
 679         else O_YNO(opt, "tcp-upstream", tcp_upstream)
 680         else O_YNO(opt, "ssl-upstream", ssl_upstream)
 681         else O_STR(opt, "ssl-service-key", ssl_service_key)
 682         else O_STR(opt, "ssl-service-pem", ssl_service_pem)
 683         else O_DEC(opt, "ssl-port", ssl_port)
 684         else O_YNO(opt, "do-daemonize", do_daemonize)
 685         else O_STR(opt, "chroot", chrootdir)
 686         else O_STR(opt, "username", username)
 687         else O_STR(opt, "directory", directory)
 688         else O_STR(opt, "logfile", logfile)
 689         else O_YNO(opt, "log-queries", log_queries)
 690         else O_STR(opt, "pidfile", pidfile)
 691         else O_YNO(opt, "hide-identity", hide_identity)
 692         else O_YNO(opt, "hide-version", hide_version)
 693         else O_STR(opt, "identity", identity)
 694         else O_STR(opt, "version", version)
 695         else O_STR(opt, "target-fetch-policy", target_fetch_policy)
 696         else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize)
 697         else O_YNO(opt, "harden-large-queries", harden_large_queries)
 698         else O_YNO(opt, "harden-glue", harden_glue)
 699         else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
 700         else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
 701         else O_YNO(opt, "harden-referral-path", harden_referral_path)
 702         else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
 703         else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
 704         else O_LST(opt, "caps-whitelist", caps_whitelist)
 705         else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
 706         else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)
 707         else O_STR(opt, "module-config", module_conf)
 708         else O_STR(opt, "dlv-anchor-file", dlv_anchor_file)
 709         else O_DEC(opt, "val-bogus-ttl", bogus_ttl)
 710         else O_YNO(opt, "val-clean-additional", val_clean_additional)
 711         else O_DEC(opt, "val-log-level", val_log_level)
 712         else O_YNO(opt, "val-permissive-mode", val_permissive_mode)
 713         else O_YNO(opt, "ignore-cd-flag", ignore_cd)
 714         else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations)
 715         else O_UNS(opt, "add-holddown", add_holddown)
 716         else O_UNS(opt, "del-holddown", del_holddown)
 717         else O_UNS(opt, "keep-missing", keep_missing)
 718         else O_YNO(opt, "permit-small-holddown", permit_small_holddown)
 719         else O_MEM(opt, "key-cache-size", key_cache_size)
 720         else O_DEC(opt, "key-cache-slabs", key_cache_slabs)
 721         else O_MEM(opt, "neg-cache-size", neg_cache_size)
 722         else O_YNO(opt, "control-enable", remote_control_enable)
 723         else O_DEC(opt, "control-port", control_port)
 724         else O_STR(opt, "server-key-file", server_key_file)
 725         else O_STR(opt, "server-cert-file", server_cert_file)
 726         else O_STR(opt, "control-key-file", control_key_file)
 727         else O_STR(opt, "control-cert-file", control_cert_file)
 728         else O_LST(opt, "root-hints", root_hints)
 729         else O_LS2(opt, "access-control", acls)
 730         else O_LST(opt, "do-not-query-address", donotqueryaddrs)
 731         else O_LST(opt, "private-address", private_address)
 732         else O_LST(opt, "private-domain", private_domain)
 733         else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list)
 734         else O_LST(opt, "trust-anchor-file", trust_anchor_file_list)
 735         else O_LST(opt, "trust-anchor", trust_anchor_list)
 736         else O_LST(opt, "trusted-keys-file", trusted_keys_file_list)
 737         else O_LST(opt, "dlv-anchor", dlv_anchor_list)
 738         else O_LST(opt, "control-interface", control_ifs)
 739         else O_LST(opt, "domain-insecure", domain_insecure)
 740         else O_UNS(opt, "val-override-date", val_date_override)
 741         else O_YNO(opt, "minimal-responses", minimal_responses)
 742         else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
 743         else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones)
 744         else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones)
 745         else O_DEC(opt, "max-udp-size", max_udp_size)
 746         else O_STR(opt, "python-script", python_script)
 747         else O_DEC(opt, "ratelimit", ratelimit)
 748         else O_MEM(opt, "ratelimit-size", ratelimit_size)
 749         else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs)
 750         else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain)
 751         else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain)
 752         else O_DEC(opt, "ratelimit-factor", ratelimit_factor)
 753         else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min)
 754         else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max)
 755         else O_YNO(opt, "qname-minimisation", qname_minimisation)
 756         /* not here:
 757          * outgoing-permit, outgoing-avoid - have list of ports
 758          * local-zone - zones and nodefault variables
 759          * local-data - see below
 760          * local-data-ptr - converted to local-data entries
 761          * stub-zone, name, stub-addr, stub-host, stub-prime
 762          * forward-zone, name, forward-addr, forward-host
 763          */
 764         else return 0;
 765         return 1;
 766 }
 767
 768 /** initialize the global cfg_parser object */
 769 static void
 770 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
 771 {
 772         static struct config_parser_state st;
 773         cfg_parser = &st;
 774         cfg_parser->filename = filename;
 775         cfg_parser->line = 1;
 776         cfg_parser->errors = 0;
 777         cfg_parser->cfg = cfg;
 778         cfg_parser->chroot = chroot;
 779         init_cfg_parse();
 780 }
 781
 782 int
 783 config_read(struct config_file* cfg, const char* filename, const char* chroot)
 784 {
 785         FILE *in;
 786         char *fname = (char*)filename;
 787 #ifdef HAVE_GLOB
 788         glob_t g;
 789         size_t i;
 790         int r, flags;
 791 #endif
 792         if(!fname)
 793                 return 1;
 794
 795         /* check for wildcards */
 796 #ifdef HAVE_GLOB
 797         if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') &&
 798                 !strchr(fname, '{') && !strchr(fname, '~'))) {
 799                 verbose(VERB_QUERY, "wildcard found, processing %s", fname);
 800                 flags = 0
 801 #ifdef GLOB_ERR
 802                         | GLOB_ERR
 803 #endif
 804 #ifdef GLOB_NOSORT
 805                         | GLOB_NOSORT
 806 #endif
 807 #ifdef GLOB_BRACE
 808                         | GLOB_BRACE
 809 #endif
 810 #ifdef GLOB_TILDE
 811                         | GLOB_TILDE
 812 #endif
 813                 ;
 814                 memset(&g, 0, sizeof(g));
 815                 r = glob(fname, flags, NULL, &g);
 816                 if(r) {
 817                         /* some error */
 818                         globfree(&g);
 819                         if(r == GLOB_NOMATCH) {
 820                                 verbose(VERB_QUERY, "include: "
 821                                 "no matches for %s", fname);
 822                                 return 1;
 823                         } else if(r == GLOB_NOSPACE) {
 824                                 log_err("include: %s: "
 825                                         "fnametern out of memory", fname);
 826                         } else if(r == GLOB_ABORTED) {
 827                                 log_err("wildcard include: %s: expansion "
 828                                         "aborted (%s)", fname, strerror(errno));
 829                         } else {
 830                                 log_err("wildcard include: %s: expansion "
 831                                         "failed (%s)", fname, strerror(errno));
 832                         }
 833                         /* ignore globs that yield no files */
 834                         return 1;
 835                 }
 836                 /* process files found, if any */
 837                 for(i=0; i<(size_t)g.gl_pathc; i++) {
 838                         if(!config_read(cfg, g.gl_pathv[i], chroot)) {
 839                                 log_err("error reading wildcard "
 840                                         "include: %s", g.gl_pathv[i]);
 841                                 globfree(&g);
 842                                 return 0;
 843                         }
 844                 }
 845                 globfree(&g);
 846                 return 1;
 847         }
 848 #endif /* HAVE_GLOB */
 849
 850         in = fopen(fname, "r");
 851         if(!in) {
 852                 log_err("Could not open %s: %s", fname, strerror(errno));
 853                 return 0;
 854         }
 855         create_cfg_parser(cfg, fname, chroot);
 856         ub_c_in = in;
 857         ub_c_parse();
 858         fclose(in);
 859
 860         if(cfg_parser->errors != 0) {
 861                 fprintf(stderr, "read %s failed: %d errors in configuration file\n",
 862                         fname, cfg_parser->errors);
 863                 errno=EINVAL;
 864                 return 0;
 865         }
 866
 867         return 1;
 868 }
 869
 870 void
 871 config_delstrlist(struct config_strlist* p)
 872 {
 873         struct config_strlist *np;
 874         while(p) {
 875                 np = p->next;
 876                 free(p->str);
 877                 free(p);
 878                 p = np;
 879         }
 880 }
 881
 882 void
 883 config_deldblstrlist(struct config_str2list* p)
 884 {
 885         struct config_str2list *np;
 886         while(p) {
 887                 np = p->next;
 888                 free(p->str);
 889                 free(p->str2);
 890                 free(p);
 891                 p = np;
 892         }
 893 }
 894
 895 void
 896 config_delstubs(struct config_stub* p)
 897 {
 898         struct config_stub* np;
 899         while(p) {
 900                 np = p->next;
 901                 free(p->name);
 902                 config_delstrlist(p->hosts);
 903                 config_delstrlist(p->addrs);
 904                 free(p);
 905                 p = np;
 906         }
 907 }
 908
 909 void
 910 config_delete(struct config_file* cfg)
 911 {
 912         if(!cfg) return;
 913         free(cfg->username);
 914         free(cfg->chrootdir);
 915         free(cfg->directory);
 916         free(cfg->logfile);
 917         free(cfg->pidfile);
 918         free(cfg->target_fetch_policy);
 919         free(cfg->ssl_service_key);
 920         free(cfg->ssl_service_pem);
 921         if(cfg->ifs) {
 922                 int i;
 923                 for(i=0; i<cfg->num_ifs; i++)
 924                         free(cfg->ifs[i]);
 925                 free(cfg->ifs);
 926         }
 927         if(cfg->out_ifs) {
 928                 int i;
 929                 for(i=0; i<cfg->num_out_ifs; i++)
 930                         free(cfg->out_ifs[i]);
 931                 free(cfg->out_ifs);
 932         }
 933         config_delstubs(cfg->stubs);
 934         config_delstubs(cfg->forwards);
 935         config_delstrlist(cfg->donotqueryaddrs);
 936         config_delstrlist(cfg->root_hints);
 937         free(cfg->identity);
 938         free(cfg->version);
 939         free(cfg->module_conf);
 940         free(cfg->outgoing_avail_ports);
 941         config_delstrlist(cfg->caps_whitelist);
 942         config_delstrlist(cfg->private_address);
 943         config_delstrlist(cfg->private_domain);
 944         config_delstrlist(cfg->auto_trust_anchor_file_list);
 945         config_delstrlist(cfg->trust_anchor_file_list);
 946         config_delstrlist(cfg->trusted_keys_file_list);
 947         config_delstrlist(cfg->trust_anchor_list);
 948         config_delstrlist(cfg->domain_insecure);
 949         free(cfg->dlv_anchor_file);
 950         config_delstrlist(cfg->dlv_anchor_list);
 951         config_deldblstrlist(cfg->acls);
 952         free(cfg->val_nsec3_key_iterations);
 953         config_deldblstrlist(cfg->local_zones);
 954         config_delstrlist(cfg->local_zones_nodefault);
 955         config_delstrlist(cfg->local_data);
 956         config_delstrlist(cfg->control_ifs);
 957         free(cfg->server_key_file);
 958         free(cfg->server_cert_file);
 959         free(cfg->control_key_file);
 960         free(cfg->control_cert_file);
 961         free(cfg->dns64_prefix);
 962         free(cfg->dnstap_socket_path);
 963         free(cfg->dnstap_identity);
 964         free(cfg->dnstap_version);
 965         config_deldblstrlist(cfg->ratelimit_for_domain);
 966         config_deldblstrlist(cfg->ratelimit_below_domain);
 967         free(cfg);
 968 }
 969
 970 static void
 971 init_outgoing_availports(int* a, int num)
 972 {
 973         /* generated with make iana_update */
 974         const int iana_assigned[] = {
 975 #include "util/iana_ports.inc"
 976                 -1 }; /* end marker to put behind trailing comma */
 977
 978         int i;
 979         /* do not use <1024, that could be trouble with the system, privs */
 980         for(i=1024; i<num; i++) {
 981                 a[i] = i;
 982         }
 983         /* create empty spot at 49152 to keep ephemeral ports available
 984          * to other programs */
 985         for(i=49152; i<49152+256; i++)
 986                 a[i] = 0;
 987         /* pick out all the IANA assigned ports */
 988         for(i=0; iana_assigned[i]!=-1; i++) {
 989                 if(iana_assigned[i] < num)
 990                         a[iana_assigned[i]] = 0;
 991         }
 992 }
 993
 994 int
 995 cfg_mark_ports(const char* str, int allow, int* avail, int num)
 996 {
 997         char* mid = strchr(str, '-');
 998         if(!mid) {
 999                 int port = atoi(str);
1000                 if(port == 0 && strcmp(str, "0") != 0) {
1001                         log_err("cannot parse port number '%s'", str);
1002                         return 0;
1003                 }
1004                 if(port < num)
1005                         avail[port] = (allow?port:0);
1006         } else {
1007                 int i, low, high = atoi(mid+1);
1008                 char buf[16];
1009                 if(high == 0 && strcmp(mid+1, "0") != 0) {
1010                         log_err("cannot parse port number '%s'", mid+1);
1011                         return 0;
1012                 }
1013                 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) {
1014                         log_err("cannot parse port number '%s'", str);
1015                         return 0;
1016                 }
1017                 if(mid > str)
1018                         memcpy(buf, str, (size_t)(mid-str));
1019                 buf[mid-str] = 0;
1020                 low = atoi(buf);
1021                 if(low == 0 && strcmp(buf, "0") != 0) {
1022                         log_err("cannot parse port number '%s'", buf);
1023                         return 0;
1024                 }
1025                 for(i=low; i<=high; i++) {
1026                         if(i < num)
1027                                 avail[i] = (allow?i:0);
1028                 }
1029                 return 1;
1030         }
1031         return 1;
1032 }
1033
1034 int
1035 cfg_scan_ports(int* avail, int num)
1036 {
1037         int i;
1038         int count = 0;
1039         for(i=0; i<num; i++) {
1040                 if(avail[i])
1041                         count++;
1042         }
1043         return count;
1044 }
1045
1046 int cfg_condense_ports(struct config_file* cfg, int** avail)
1047 {
1048         int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536);
1049         int i, at = 0;
1050         *avail = NULL;
1051         if(num == 0)
1052                 return 0;
1053         *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int));
1054         if(!*avail)
1055                 return 0;
1056         for(i=0; i<65536; i++) {
1057                 if(cfg->outgoing_avail_ports[i])
1058                         (*avail)[at++] = cfg->outgoing_avail_ports[i];
1059         }
1060         log_assert(at == num);
1061         return num;
1062 }
1063
1064 /** print error with file and line number */
1065 static void ub_c_error_va_list(const char *fmt, va_list args)
1066 {
1067         cfg_parser->errors++;
1068         fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
1069         cfg_parser->line);
1070         vfprintf(stderr, fmt, args);
1071         fprintf(stderr, "\n");
1072 }
1073
1074 /** print error with file and line number */
1075 void ub_c_error_msg(const char* fmt, ...)
1076 {
1077         va_list args;
1078         va_start(args, fmt);
1079         ub_c_error_va_list(fmt, args);
1080         va_end(args);
1081 }
1082
1083 void ub_c_error(const char *str)
1084 {
1085         cfg_parser->errors++;
1086         fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
1087                 cfg_parser->line, str);
1088 }
1089
1090 int ub_c_wrap(void)
1091 {
1092         return 1;
1093 }
1094
1095 int cfg_strlist_append(struct config_strlist_head* list, char* item)
1096 {
1097         struct config_strlist *s;
1098         if(!item || !list)
1099                 return 0;
1100         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1101         if(!s)
1102                 return 0;
1103         s->str = item;
1104         s->next = NULL;
1105         if(list->last)
1106                 list->last->next = s;
1107         else
1108                 list->first = s;
1109         list->last = s;
1110         return 1;
1111 }
1112
1113 int
1114 cfg_strlist_insert(struct config_strlist** head, char* item)
1115 {
1116         struct config_strlist *s;
1117         if(!item || !head)
1118                 return 0;
1119         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1120         if(!s)
1121                 return 0;
1122         s->str = item;
1123         s->next = *head;
1124         *head = s;
1125         return 1;
1126 }
1127
1128 int
1129 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
1130 {
1131         struct config_str2list *s;
1132         if(!item || !i2 || !head)
1133                 return 0;
1134         s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
1135         if(!s)
1136                 return 0;
1137         s->str = item;
1138         s->str2 = i2;
1139         s->next = *head;
1140         *head = s;
1141         return 1;
1142 }
1143
1144 time_t
1145 cfg_convert_timeval(const char* str)
1146 {
1147         time_t t;
1148         struct tm tm;
1149         memset(&tm, 0, sizeof(tm));
1150         if(strlen(str) < 14)
1151                 return 0;
1152         if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
1153                 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
1154                 return 0;
1155         tm.tm_year -= 1900;
1156         tm.tm_mon--;
1157         /* Check values */
1158         if (tm.tm_year < 70)    return 0;
1159         if (tm.tm_mon < 0 || tm.tm_mon > 11)    return 0;
1160         if (tm.tm_mday < 1 || tm.tm_mday > 31)  return 0;
1161         if (tm.tm_hour < 0 || tm.tm_hour > 23)  return 0;
1162         if (tm.tm_min < 0 || tm.tm_min > 59)    return 0;
1163         if (tm.tm_sec < 0 || tm.tm_sec > 59)    return 0;
1164         /* call ldns conversion function */
1165         t = sldns_mktime_from_utc(&tm);
1166         return t;
1167 }
1168
1169 int
1170 cfg_count_numbers(const char* s)
1171 {
1172         /* format ::= (sp num)+ sp  */
1173         /* num ::= [-](0-9)+        */
1174         /* sp ::= (space|tab)*      */
1175         int num = 0;
1176         while(*s) {
1177                 while(*s && isspace((unsigned char)*s))
1178                         s++;
1179                 if(!*s) /* end of string */
1180                         break;
1181                 if(*s == '-')
1182                         s++;
1183                 if(!*s) /* only - not allowed */
1184                         return 0;
1185                 if(!isdigit((unsigned char)*s)) /* bad character */
1186                         return 0;
1187                 while(*s && isdigit((unsigned char)*s))
1188                         s++;
1189                 num++;
1190         }
1191         return num;
1192 }
1193
1194 /** all digit number */
1195 static int isalldigit(const char* str, size_t l)
1196 {
1197         size_t i;
1198         for(i=0; i<l; i++)
1199                 if(!isdigit((unsigned char)str[i]))
1200                         return 0;
1201         return 1;
1202 }
1203
1204 int
1205 cfg_parse_memsize(const char* str, size_t* res)
1206 {
1207         size_t len;
1208         size_t mult = 1;
1209         if(!str || (len=(size_t)strlen(str)) == 0) {
1210                 log_err("not a size: '%s'", str);
1211                 return 0;
1212         }
1213         if(isalldigit(str, len)) {
1214                 *res = (size_t)atol(str);
1215                 return 1;
1216         }
1217         /* check appended num */
1218         while(len>0 && str[len-1]==' ')
1219                 len--;
1220         if(len > 1 && str[len-1] == 'b')
1221                 len--;
1222         else if(len > 1 && str[len-1] == 'B')
1223                 len--;
1224
1225         if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
1226                 mult = 1024*1024*1024;
1227         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
1228                 mult = 1024*1024;
1229         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k')
1230                 mult = 1024;
1231         else if(len > 0 && isdigit((unsigned char)str[len-1]))
1232                 mult = 1;
1233         else {
1234                 log_err("unknown size specifier: '%s'", str);
1235                 return 0;
1236         }
1237         while(len>1 && str[len-2]==' ')
1238                 len--;
1239
1240         if(!isalldigit(str, len-1)) {
1241                 log_err("unknown size specifier: '%s'", str);
1242                 return 0;
1243         }
1244         *res = ((size_t)atol(str)) * mult;
1245         return 1;
1246 }
1247
1248 void
1249 config_apply(struct config_file* config)
1250 {
1251         MAX_TTL = (time_t)config->max_ttl;
1252         MIN_TTL = (time_t)config->min_ttl;
1253         MAX_NEG_TTL = (time_t)config->max_negative_ttl;
1254         RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
1255         EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
1256         MINIMAL_RESPONSES = config->minimal_responses;
1257         RRSET_ROUNDROBIN = config->rrset_roundrobin;
1258         log_set_time_asc(config->log_time_ascii);
1259         autr_permit_small_holddown = config->permit_small_holddown;
1260 }
1261
1262 void config_lookup_uid(struct config_file* cfg)
1263 {
1264 #ifdef HAVE_GETPWNAM
1265         /* translate username into uid and gid */
1266         if(cfg->username && cfg->username[0]) {
1267                 struct passwd *pwd;
1268                 if((pwd = getpwnam(cfg->username)) != NULL) {
1269                         cfg_uid = pwd->pw_uid;
1270                         cfg_gid = pwd->pw_gid;
1271                 }
1272         }
1273 #else
1274         (void)cfg;
1275 #endif
1276 }
1277
1278 /**
1279  * Calculate string length of full pathname in original filesys
1280  * @param fname: the path name to convert.
1281  *      Must not be null or empty.
1282  * @param cfg: config struct for chroot and chdir (if set).
1283  * @param use_chdir: if false, only chroot is applied.
1284  * @return length of string.
1285  *      remember to allocate one more for 0 at end in mallocs.
1286  */
1287 static size_t
1288 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
1289 {
1290         size_t len = 0;
1291         int slashit = 0;
1292         if(cfg->chrootdir && cfg->chrootdir[0] &&
1293                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
1294                 /* already full pathname, return it */
1295                 return strlen(fname);
1296         }
1297         /* chroot */
1298         if(cfg->chrootdir && cfg->chrootdir[0]) {
1299                 /* start with chrootdir */
1300                 len += strlen(cfg->chrootdir);
1301                 slashit = 1;
1302         }
1303         /* chdir */
1304 #ifdef UB_ON_WINDOWS
1305         if(fname[0] != 0 && fname[1] == ':') {
1306                 /* full path, no chdir */
1307         } else
1308 #endif
1309         if(fname[0] == '/' || !use_chdir) {
1310                 /* full path, no chdir */
1311         } else if(cfg->directory && cfg->directory[0]) {
1312                 /* prepend chdir */
1313                 if(slashit && cfg->directory[0] != '/')
1314                         len++;
1315                 if(cfg->chrootdir && cfg->chrootdir[0] &&
1316                         strncmp(cfg->chrootdir, cfg->directory,
1317                         strlen(cfg->chrootdir)) == 0)
1318                         len += strlen(cfg->directory)-strlen(cfg->chrootdir);
1319                 else    len += strlen(cfg->directory);
1320                 slashit = 1;
1321         }
1322         /* fname */
1323         if(slashit && fname[0] != '/')
1324                 len++;
1325         len += strlen(fname);
1326         return len;
1327 }
1328
1329 char*
1330 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
1331 {
1332         size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1;
1333         int slashit = 0;
1334         char* buf = (char*)malloc(len);
1335         if(!buf)
1336                 return NULL;
1337         buf[0] = 0;
1338         /* is fname already in chroot ? */
1339         if(cfg->chrootdir && cfg->chrootdir[0] &&
1340                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
1341                 /* already full pathname, return it */
1342                 (void)strlcpy(buf, fname, len);
1343                 buf[len-1] = 0;
1344                 return buf;
1345         }
1346         /* chroot */
1347         if(cfg->chrootdir && cfg->chrootdir[0]) {
1348                 /* start with chrootdir */
1349                 (void)strlcpy(buf, cfg->chrootdir, len);
1350                 slashit = 1;
1351         }
1352 #ifdef UB_ON_WINDOWS
1353         if(fname[0] != 0 && fname[1] == ':') {
1354                 /* full path, no chdir */
1355         } else
1356 #endif
1357         /* chdir */
1358         if(fname[0] == '/' || !use_chdir) {
1359                 /* full path, no chdir */
1360         } else if(cfg->directory && cfg->directory[0]) {
1361                 /* prepend chdir */
1362                 if(slashit && cfg->directory[0] != '/')
1363                         (void)strlcat(buf, "/", len);
1364                 /* is the directory already in the chroot? */
1365                 if(cfg->chrootdir && cfg->chrootdir[0] &&
1366                         strncmp(cfg->chrootdir, cfg->directory,
1367                         strlen(cfg->chrootdir)) == 0)
1368                         (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
1369                                    len);
1370                 else (void)strlcat(buf, cfg->directory, len);
1371                 slashit = 1;
1372         }
1373         /* fname */
1374         if(slashit && fname[0] != '/')
1375                 (void)strlcat(buf, "/", len);
1376         (void)strlcat(buf, fname, len);
1377         buf[len-1] = 0;
1378         return buf;
1379 }
1380
1381 /** return next space character in string */
1382 static char* next_space_pos(const char* str)
1383 {
1384         char* sp = strchr(str, ' ');
1385         char* tab = strchr(str, '\t');
1386         if(!tab && !sp)
1387                 return NULL;
1388         if(!sp) return tab;
1389         if(!tab) return sp;
1390         return (sp<tab)?sp:tab;
1391 }
1392
1393 /** return last space character in string */
1394 static char* last_space_pos(const char* str)
1395 {
1396         char* sp = strrchr(str, ' ');
1397         char* tab = strrchr(str, '\t');
1398         if(!tab && !sp)
1399                 return NULL;
1400         if(!sp) return tab;
1401         if(!tab) return sp;
1402         return (sp>tab)?sp:tab;
1403 }
1404
1405 int
1406 cfg_parse_local_zone(struct config_file* cfg, const char* val)
1407 {
1408         const char *type, *name_end, *name;
1409         char buf[256];
1410
1411         /* parse it as: [zone_name] [between stuff] [zone_type] */
1412         name = val;
1413         while(*name && isspace((unsigned char)*name))
1414                 name++;
1415         if(!*name) {
1416                 log_err("syntax error: too short: %s", val);
1417                 return 0;
1418         }
1419         name_end = next_space_pos(name);
1420         if(!name_end || !*name_end) {
1421                 log_err("syntax error: expected zone type: %s", val);
1422                 return 0;
1423         }
1424         if (name_end - name > 255) {
1425                 log_err("syntax error: bad zone name: %s", val);
1426                 return 0;
1427         }
1428         (void)strlcpy(buf, name, sizeof(buf));
1429         buf[name_end-name] = '\0';
1430
1431         type = last_space_pos(name_end);
1432         while(type && *type && isspace((unsigned char)*type))
1433                 type++;
1434         if(!type || !*type) {
1435                 log_err("syntax error: expected zone type: %s", val);
1436                 return 0;
1437         }
1438
1439         if(strcmp(type, "nodefault")==0) {
1440                 return cfg_strlist_insert(&cfg->local_zones_nodefault,
1441                         strdup(name));
1442         } else {
1443                 return cfg_str2list_insert(&cfg->local_zones, strdup(buf),
1444                         strdup(type));
1445         }
1446 }
1447
1448 char* cfg_ptr_reverse(char* str)
1449 {
1450         char* ip, *ip_end;
1451         char* name;
1452         char* result;
1453         char buf[1024];
1454         struct sockaddr_storage addr;
1455         socklen_t addrlen;
1456
1457         /* parse it as: [IP] [between stuff] [name] */
1458         ip = str;
1459         while(*ip && isspace((unsigned char)*ip))
1460                 ip++;
1461         if(!*ip) {
1462                 log_err("syntax error: too short: %s", str);
1463                 return NULL;
1464         }
1465         ip_end = next_space_pos(ip);
1466         if(!ip_end || !*ip_end) {
1467                 log_err("syntax error: expected name: %s", str);
1468                 return NULL;
1469         }
1470
1471         name = last_space_pos(ip_end);
1472         if(!name || !*name) {
1473                 log_err("syntax error: expected name: %s", str);
1474                 return NULL;
1475         }
1476
1477         sscanf(ip, "%100s", buf);
1478         buf[sizeof(buf)-1]=0;
1479
1480         if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) {
1481                 log_err("syntax error: cannot parse address: %s", str);
1482                 return NULL;
1483         }
1484
1485         /* reverse IPv4:
1486          * ddd.ddd.ddd.ddd.in-addr-arpa.
1487          * IPv6: (h.){32}.ip6.arpa.  */
1488
1489         if(addr_is_ip6(&addr, addrlen)) {
1490                 uint8_t ad[16];
1491                 const char* hex = "0123456789abcdef";
1492                 char *p = buf;
1493                 int i;
1494                 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
1495                         sizeof(ad));
1496                 for(i=15; i>=0; i--) {
1497                         uint8_t b = ad[i];
1498                         *p++ = hex[ (b&0x0f) ];
1499                         *p++ = '.';
1500                         *p++ = hex[ (b&0xf0) >> 4 ];
1501                         *p++ = '.';
1502                 }
1503                 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
1504         } else {
1505                 uint8_t ad[4];
1506                 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
1507                         sizeof(ad));
1508                 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
1509                         (unsigned)ad[3], (unsigned)ad[2],
1510                         (unsigned)ad[1], (unsigned)ad[0]);
1511         }
1512
1513         /* printed the reverse address, now the between goop and name on end */
1514         while(*ip_end && isspace((unsigned char)*ip_end))
1515                 ip_end++;
1516         if(name>ip_end) {
1517                 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s",
1518                         (int)(name-ip_end), ip_end);
1519         }
1520         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name);
1521
1522         result = strdup(buf);
1523         if(!result) {
1524                 log_err("out of memory parsing %s", str);
1525                 return NULL;
1526         }
1527         return result;
1528 }
1529
1530 #ifdef UB_ON_WINDOWS
1531 char*
1532 w_lookup_reg_str(const char* key, const char* name)
1533 {
1534         HKEY hk = NULL;
1535         DWORD type = 0;
1536         BYTE buf[1024];
1537         DWORD len = (DWORD)sizeof(buf);
1538         LONG ret;
1539         char* result = NULL;
1540         ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
1541         if(ret == ERROR_FILE_NOT_FOUND)
1542                 return NULL; /* key does not exist */
1543         else if(ret != ERROR_SUCCESS) {
1544                 log_err("RegOpenKeyEx failed");
1545                 return NULL;
1546         }
1547         ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
1548         if(RegCloseKey(hk))
1549                 log_err("RegCloseKey");
1550         if(ret == ERROR_FILE_NOT_FOUND)
1551                 return NULL; /* name does not exist */
1552         else if(ret != ERROR_SUCCESS) {
1553                 log_err("RegQueryValueEx failed");
1554                 return NULL;
1555         }
1556         if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
1557                 buf[sizeof(buf)-1] = 0;
1558                 buf[sizeof(buf)-2] = 0; /* for multi_sz */
1559                 result = strdup((char*)buf);
1560                 if(!result) log_err("out of memory");
1561         }
1562         return result;
1563 }
1564
1565 void w_config_adjust_directory(struct config_file* cfg)
1566 {
1567         if(cfg->directory && cfg->directory[0]) {
1568                 TCHAR dirbuf[2*MAX_PATH+4];
1569                 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) {
1570                         /* get executable path, and if that contains
1571                          * directories, snip off the filename part */
1572                         dirbuf[0] = 0;
1573                         if(!GetModuleFileName(NULL, dirbuf, MAX_PATH))
1574                                 log_err("could not GetModuleFileName");
1575                         if(strrchr(dirbuf, '\\')) {
1576                                 (strrchr(dirbuf, '\\'))[0] = 0;
1577                         } else log_err("GetModuleFileName had no path");
1578                         if(dirbuf[0]) {
1579                                 /* adjust directory for later lookups to work*/
1580                                 free(cfg->directory);
1581                                 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1);
1582                         }
1583                 }
1584         }
1585 }
1586 #endif /* UB_ON_WINDOWS */
1587
1588 void errinf(struct module_qstate* qstate, const char* str)
1589 {
1590         struct config_strlist* p;
1591         if(qstate->env->cfg->val_log_level < 2 || !str)
1592                 return;
1593         p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p));
1594         if(!p) {
1595                 log_err("malloc failure in validator-error-info string");
1596                 return;
1597         }
1598         p->next = NULL;
1599         p->str = regional_strdup(qstate->region, str);
1600         if(!p->str) {
1601                 log_err("malloc failure in validator-error-info string");
1602                 return;
1603         }
1604         /* add at end */
1605         if(qstate->errinf) {
1606                 struct config_strlist* q = qstate->errinf;
1607                 while(q->next)
1608                         q = q->next;
1609                 q->next = p;
1610         } else  qstate->errinf = p;
1611 }
1612
1613 void errinf_origin(struct module_qstate* qstate, struct sock_list *origin)
1614 {
1615         struct sock_list* p;
1616         if(qstate->env->cfg->val_log_level < 2)
1617                 return;
1618         for(p=origin; p; p=p->next) {
1619                 char buf[256];
1620                 if(p == origin)
1621                         snprintf(buf, sizeof(buf), "from ");
1622                 else    snprintf(buf, sizeof(buf), "and ");
1623                 if(p->len == 0)
1624                         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf),
1625                                 "cache");
1626                 else
1627                         addr_to_str(&p->addr, p->len, buf+strlen(buf),
1628                                 sizeof(buf)-strlen(buf));
1629                 errinf(qstate, buf);
1630         }
1631 }
1632
1633 char* errinf_to_str(struct module_qstate* qstate)
1634 {
1635         char buf[20480];
1636         char* p = buf;
1637         size_t left = sizeof(buf);
1638         struct config_strlist* s;
1639         char dname[LDNS_MAX_DOMAINLEN+1];
1640         char t[16], c[16];
1641         sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t));
1642         sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c));
1643         dname_str(qstate->qinfo.qname, dname);
1644         snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c);
1645         left -= strlen(p); p += strlen(p);
1646         if(!qstate->errinf)
1647                 snprintf(p, left, " misc failure");
1648         else for(s=qstate->errinf; s; s=s->next) {
1649                 snprintf(p, left, " %s", s->str);
1650                 left -= strlen(p); p += strlen(p);
1651         }
1652         p = strdup(buf);
1653         if(!p)
1654                 log_err("malloc failure in errinf_to_str");
1655         return p;
1656 }
1657
1658 void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr)
1659 {
1660         char buf[1024];
1661         char dname[LDNS_MAX_DOMAINLEN+1];
1662         char t[16], c[16];
1663         if(qstate->env->cfg->val_log_level < 2 || !rr)
1664                 return;
1665         sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t));
1666         sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c));
1667         dname_str(rr->rk.dname, dname);
1668         snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c);
1669         errinf(qstate, buf);
1670 }
1671
1672 void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname)
1673 {
1674         char b[1024];
1675         char buf[LDNS_MAX_DOMAINLEN+1];
1676         if(qstate->env->cfg->val_log_level < 2 || !str || !dname)
1677                 return;
1678         dname_str(dname, buf);
1679         snprintf(b, sizeof(b), "%s %s", str, buf);
1680         errinf(qstate, b);
1681 }