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