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