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