contrib/unbound/util/config_file.c

   1 /*
   2  * util/config_file.c - reads and stores the config file for unbound.
   3  *
   4  * Copyright (c) 2007, NLnet Labs. All rights reserved.
   5  *
   6  * This software is open source.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * Redistributions of source code must retain the above copyright notice,
  13  * this list of conditions and the following disclaimer.
  14  *
  15  * Redistributions in binary form must reproduce the above copyright notice,
  16  * this list of conditions and the following disclaimer in the documentation
  17  * and/or other materials provided with the distribution.
  18  *
  19  * Neither the name of the NLNET LABS nor the names of its contributors may
  20  * be used to endorse or promote products derived from this software without
  21  * specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 /**
  37  * \file
  38  *
  39  * This file contains functions for the config file.
  40  */
  41
  42 #include "config.h"
  43 #include <ctype.h>
  44 #include <stdarg.h>
  45 #ifdef HAVE_TIME_H
  46 #include <time.h>
  47 #endif
  48 #include "util/log.h"
  49 #include "util/configyyrename.h"
  50 #include "util/config_file.h"
  51 #include "configparser.h"
  52 #include "util/net_help.h"
  53 #include "util/data/msgparse.h"
  54 #include "util/module.h"
  55 #include "util/regional.h"
  56 #include "util/fptr_wlist.h"
  57 #include "util/data/dname.h"
  58 #include "util/rtt.h"
  59 #include "services/cache/infra.h"
  60 #include "sldns/wire2str.h"
  61 #include "sldns/parseutil.h"
  62 #ifdef HAVE_GLOB_H
  63 # include <glob.h>
  64 #endif
  65 #ifdef HAVE_PWD_H
  66 #include <pwd.h>
  67 #endif
  68
  69 /** from cfg username, after daemonise setup performed */
  70 uid_t cfg_uid = (uid_t)-1;
  71 /** from cfg username, after daemonise setup performed */
  72 gid_t cfg_gid = (gid_t)-1;
  73 /** for debug allow small timeout values for fast rollovers */
  74 int autr_permit_small_holddown = 0;
  75
  76 /** global config during parsing */
  77 struct config_parser_state* cfg_parser = 0;
  78
  79 /** init ports possible for use */
  80 static void init_outgoing_availports(int* array, int num);
  81
  82 struct config_file*
  83 config_create(void)
  84 {
  85         struct config_file* cfg;
  86         cfg = (struct config_file*)calloc(1, sizeof(struct config_file));
  87         if(!cfg)
  88                 return NULL;
  89         /* the defaults if no config is present */
  90         cfg->verbosity = 1;
  91         cfg->stat_interval = 0;
  92         cfg->stat_cumulative = 0;
  93         cfg->stat_extended = 0;
  94         cfg->num_threads = 1;
  95         cfg->port = UNBOUND_DNS_PORT;
  96         cfg->do_ip4 = 1;
  97         cfg->do_ip6 = 1;
  98         cfg->do_udp = 1;
  99         cfg->do_tcp = 1;
 100         cfg->tcp_upstream = 0;
 101         cfg->tcp_mss = 0;
 102         cfg->outgoing_tcp_mss = 0;
 103         cfg->ssl_service_key = NULL;
 104         cfg->ssl_service_pem = NULL;
 105         cfg->ssl_port = 853;
 106         cfg->ssl_upstream = 0;
 107         cfg->use_syslog = 1;
 108         cfg->log_time_ascii = 0;
 109         cfg->log_queries = 0;
 110 #ifndef USE_WINSOCK
 111 #  ifdef USE_MINI_EVENT
 112         /* select max 1024 sockets */
 113         cfg->outgoing_num_ports = 960;
 114         cfg->num_queries_per_thread = 512;
 115 #  else
 116         /* libevent can use many sockets */
 117         cfg->outgoing_num_ports = 4096;
 118         cfg->num_queries_per_thread = 1024;
 119 #  endif
 120         cfg->outgoing_num_tcp = 10;
 121         cfg->incoming_num_tcp = 10;
 122 #else
 123         cfg->outgoing_num_ports = 48; /* windows is limited in num fds */
 124         cfg->num_queries_per_thread = 24;
 125         cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */
 126         cfg->incoming_num_tcp = 2;
 127 #endif
 128         cfg->edns_buffer_size = 4096; /* 4k from rfc recommendation */
 129         cfg->msg_buffer_size = 65552; /* 64 k + a small margin */
 130         cfg->msg_cache_size = 4 * 1024 * 1024;
 131         cfg->msg_cache_slabs = 4;
 132         cfg->jostle_time = 200;
 133         cfg->rrset_cache_size = 4 * 1024 * 1024;
 134         cfg->rrset_cache_slabs = 4;
 135         cfg->host_ttl = 900;
 136         cfg->bogus_ttl = 60;
 137         cfg->min_ttl = 0;
 138         cfg->max_ttl = 3600 * 24;
 139         cfg->max_negative_ttl = 3600;
 140         cfg->prefetch = 0;
 141         cfg->prefetch_key = 0;
 142         cfg->infra_cache_slabs = 4;
 143         cfg->infra_cache_numhosts = 10000;
 144         cfg->infra_cache_min_rtt = 50;
 145         cfg->delay_close = 0;
 146         if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int))))
 147                 goto error_exit;
 148         init_outgoing_availports(cfg->outgoing_avail_ports, 65536);
 149         if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit;
 150 #ifdef HAVE_CHROOT
 151         if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit;
 152 #endif
 153         if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit;
 154         if(!(cfg->logfile = strdup(""))) goto error_exit;
 155         if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit;
 156         if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit;
 157         cfg->donotqueryaddrs = NULL;
 158         cfg->donotquery_localhost = 1;
 159         cfg->root_hints = NULL;
 160         cfg->do_daemonize = 1;
 161         cfg->if_automatic = 0;
 162         cfg->so_rcvbuf = 0;
 163         cfg->so_sndbuf = 0;
 164         cfg->so_reuseport = 0;
 165         cfg->ip_transparent = 0;
 166         cfg->ip_freebind = 0;
 167         cfg->num_ifs = 0;
 168         cfg->ifs = NULL;
 169         cfg->num_out_ifs = 0;
 170         cfg->out_ifs = NULL;
 171         cfg->stubs = NULL;
 172         cfg->forwards = NULL;
 173         cfg->acls = NULL;
 174         cfg->harden_short_bufsize = 0;
 175         cfg->harden_large_queries = 0;
 176         cfg->harden_glue = 1;
 177         cfg->harden_dnssec_stripped = 1;
 178         cfg->harden_below_nxdomain = 0;
 179         cfg->harden_referral_path = 0;
 180         cfg->harden_algo_downgrade = 0;
 181         cfg->use_caps_bits_for_id = 0;
 182         cfg->caps_whitelist = NULL;
 183         cfg->private_address = NULL;
 184         cfg->private_domain = NULL;
 185         cfg->unwanted_threshold = 0;
 186         cfg->hide_identity = 0;
 187         cfg->hide_version = 0;
 188         cfg->identity = NULL;
 189         cfg->version = NULL;
 190         cfg->auto_trust_anchor_file_list = NULL;
 191         cfg->trust_anchor_file_list = NULL;
 192         cfg->trust_anchor_list = NULL;
 193         cfg->trusted_keys_file_list = NULL;
 194         cfg->dlv_anchor_file = NULL;
 195         cfg->dlv_anchor_list = NULL;
 196         cfg->domain_insecure = NULL;
 197         cfg->val_date_override = 0;
 198         cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */
 199         cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */
 200         cfg->val_clean_additional = 1;
 201         cfg->val_log_level = 0;
 202         cfg->val_log_squelch = 0;
 203         cfg->val_permissive_mode = 0;
 204         cfg->ignore_cd = 0;
 205         cfg->add_holddown = 30*24*3600;
 206         cfg->del_holddown = 30*24*3600;
 207         cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */
 208         cfg->permit_small_holddown = 0;
 209         cfg->key_cache_size = 4 * 1024 * 1024;
 210         cfg->key_cache_slabs = 4;
 211         cfg->neg_cache_size = 1 * 1024 * 1024;
 212         cfg->local_zones = NULL;
 213         cfg->local_zones_nodefault = NULL;
 214         cfg->local_data = NULL;
 215         cfg->local_zone_overrides = NULL;
 216         cfg->unblock_lan_zones = 0;
 217         cfg->insecure_lan_zones = 0;
 218         cfg->python_script = NULL;
 219         cfg->remote_control_enable = 0;
 220         cfg->control_ifs = NULL;
 221         cfg->control_port = UNBOUND_CONTROL_PORT;
 222         cfg->remote_control_use_cert = 1;
 223         cfg->minimal_responses = 0;
 224         cfg->rrset_roundrobin = 0;
 225         cfg->max_udp_size = 4096;
 226         if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
 227                 goto error_exit;
 228         if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
 229                 goto error_exit;
 230         if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
 231                 goto error_exit;
 232         if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
 233                 goto error_exit;
 234
 235         if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
 236         if(!(cfg->val_nsec3_key_iterations =
 237                 strdup("1024 150 2048 500 4096 2500"))) goto error_exit;
 238 #if defined(DNSTAP_SOCKET_PATH)
 239         if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
 240                 goto error_exit;
 241 #endif
 242         cfg->disable_dnssec_lame_check = 0;
 243         cfg->ratelimit = 0;
 244         cfg->ratelimit_slabs = 4;
 245         cfg->ratelimit_size = 4*1024*1024;
 246         cfg->ratelimit_for_domain = NULL;
 247         cfg->ratelimit_below_domain = NULL;
 248         cfg->ratelimit_factor = 10;
 249         cfg->qname_minimisation = 0;
 250         return cfg;
 251 error_exit:
 252         config_delete(cfg);
 253         return NULL;
 254 }
 255
 256 struct config_file* config_create_forlib(void)
 257 {
 258         struct config_file* cfg = config_create();
 259         if(!cfg) return NULL;
 260         /* modifications for library use, less verbose, less memory */
 261         free(cfg->chrootdir);
 262         cfg->chrootdir = NULL;
 263         cfg->verbosity = 0;
 264         cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable'
 265                 and probably within the ulimit(maxfds) of the user */
 266         cfg->outgoing_num_tcp = 2;
 267         cfg->msg_cache_size = 1024*1024;
 268         cfg->msg_cache_slabs = 1;
 269         cfg->rrset_cache_size = 1024*1024;
 270         cfg->rrset_cache_slabs = 1;
 271         cfg->infra_cache_slabs = 1;
 272         cfg->use_syslog = 0;
 273         cfg->key_cache_size = 1024*1024;
 274         cfg->key_cache_slabs = 1;
 275         cfg->neg_cache_size = 100 * 1024;
 276         cfg->donotquery_localhost = 0; /* allow, so that you can ask a
 277                 forward nameserver running on localhost */
 278         cfg->val_log_level = 2; /* to fill why_bogus with */
 279         cfg->val_log_squelch = 1;
 280         return cfg;
 281 }
 282
 283 /** check that the value passed is >= 0 */
 284 #define IS_NUMBER_OR_ZERO \
 285         if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0
 286 /** check that the value passed is > 0 */
 287 #define IS_NONZERO_NUMBER \
 288         if(atoi(val) == 0) return 0
 289 /** check that the value passed is not 0 and a power of 2 */
 290 #define IS_POW2_NUMBER \
 291         if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0
 292 /** check that the value passed is yes or no */
 293 #define IS_YES_OR_NO \
 294         if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0
 295 /** put integer_or_zero into variable */
 296 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 297         { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); }
 298 /** put integer_nonzero into variable */
 299 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 300         { IS_NONZERO_NUMBER; cfg->var = atoi(val); }
 301 /** put integer_or_zero into unsigned */
 302 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 303         { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); }
 304 /** put integer_or_zero into size_t */
 305 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
 306         { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); }
 307 /** put integer_nonzero into size_t */
 308 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \
 309         { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); }
 310 /** put yesno into variable */
 311 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \
 312         { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); }
 313 /** put memsize into variable */
 314 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \
 315         { return cfg_parse_memsize(val, &cfg->var); }
 316 /** put pow2 number into variable */
 317 #define S_POW2(str, var) if(strcmp(opt, str)==0) \
 318         { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); }
 319 /** put string into variable */
 320 #define S_STR(str, var) if(strcmp(opt, str)==0) \
 321         { free(cfg->var); return (cfg->var = strdup(val)) != NULL; }
 322 /** put string into strlist */
 323 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \
 324         { return cfg_strlist_insert(&cfg->var, strdup(val)); }
 325
 326 int config_set_option(struct config_file* cfg, const char* opt,
 327         const char* val)
 328 {
 329         S_NUMBER_OR_ZERO("verbosity:", verbosity)
 330         else if(strcmp(opt, "statistics-interval:") == 0) {
 331                 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
 332                         cfg->stat_interval = 0;
 333                 else if(atoi(val) == 0)
 334                         return 0;
 335                 else cfg->stat_interval = atoi(val);
 336         } else if(strcmp(opt, "num_threads:") == 0) {
 337                 /* not supported, library must have 1 thread in bgworker */
 338                 return 0;
 339         } else if(strcmp(opt, "outgoing-port-permit:") == 0) {
 340                 return cfg_mark_ports(val, 1,
 341                         cfg->outgoing_avail_ports, 65536);
 342         } else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
 343                 return cfg_mark_ports(val, 0,
 344                         cfg->outgoing_avail_ports, 65536);
 345         } else if(strcmp(opt, "local-zone:") == 0) {
 346                 return cfg_parse_local_zone(cfg, val);
 347         } else if(strcmp(opt, "val-override-date:") == 0) {
 348                 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) {
 349                         cfg->val_date_override = 0;
 350                 } else if(strlen(val) == 14) {
 351                         cfg->val_date_override = cfg_convert_timeval(val);
 352                         return cfg->val_date_override != 0;
 353                 } else {
 354                         if(atoi(val) == 0) return 0;
 355                         cfg->val_date_override = (uint32_t)atoi(val);
 356                 }
 357         } else if(strcmp(opt, "local-data-ptr:") == 0) {
 358                 char* ptr = cfg_ptr_reverse((char*)opt);
 359                 return cfg_strlist_insert(&cfg->local_data, ptr);
 360         } else if(strcmp(opt, "logfile:") == 0) {
 361                 cfg->use_syslog = 0;
 362                 free(cfg->logfile);
 363                 return (cfg->logfile = strdup(val)) != NULL;
 364         }
 365         else if(strcmp(opt, "log-time-ascii:") == 0)
 366         { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0);
 367           log_set_time_asc(cfg->log_time_ascii); }
 368         else S_SIZET_NONZERO("max-udp-size:", max_udp_size)
 369         else S_YNO("use-syslog:", use_syslog)
 370         else S_YNO("extended-statistics:", stat_extended)
 371         else S_YNO("statistics-cumulative:", stat_cumulative)
 372         else S_YNO("do-ip4:", do_ip4)
 373         else S_YNO("do-ip6:", do_ip6)
 374         else S_YNO("do-udp:", do_udp)
 375         else S_YNO("do-tcp:", do_tcp)
 376         else S_YNO("tcp-upstream:", tcp_upstream)
 377         else S_NUMBER_NONZERO("tcp-mss:", tcp_mss)
 378         else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss)
 379         else S_YNO("ssl-upstream:", ssl_upstream)
 380         else S_STR("ssl-service-key:", ssl_service_key)
 381         else S_STR("ssl-service-pem:", ssl_service_pem)
 382         else S_NUMBER_NONZERO("ssl-port:", ssl_port)
 383         else S_YNO("interface-automatic:", if_automatic)
 384         else S_YNO("do-daemonize:", do_daemonize)
 385         else S_NUMBER_NONZERO("port:", port)
 386         else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports)
 387         else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp)
 388         else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp)
 389         else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size)
 390         else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size)
 391         else S_MEMSIZE("msg-cache-size:", msg_cache_size)
 392         else S_POW2("msg-cache-slabs:", msg_cache_slabs)
 393         else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread)
 394         else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time)
 395         else S_MEMSIZE("so-rcvbuf:", so_rcvbuf)
 396         else S_MEMSIZE("so-sndbuf:", so_sndbuf)
 397         else S_YNO("so-reuseport:", so_reuseport)
 398         else S_YNO("ip-transparent:", ip_transparent)
 399         else S_YNO("ip-freebind:", ip_freebind)
 400         else S_MEMSIZE("rrset-cache-size:", rrset_cache_size)
 401         else S_POW2("rrset-cache-slabs:", rrset_cache_slabs)
 402         else S_YNO("prefetch:", prefetch)
 403         else S_YNO("prefetch-key:", prefetch_key)
 404         else if(strcmp(opt, "cache-max-ttl:") == 0)
 405         { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
 406         else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
 407         { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
 408         else if(strcmp(opt, "cache-min-ttl:") == 0)
 409         { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
 410         else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
 411             IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val);
 412             RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt;
 413         }
 414         else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl)
 415         else S_POW2("infra-cache-slabs:", infra_cache_slabs)
 416         else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts)
 417         else S_NUMBER_OR_ZERO("delay-close:", delay_close)
 418         else S_STR("chroot:", chrootdir)
 419         else S_STR("username:", username)
 420         else S_STR("directory:", directory)
 421         else S_STR("pidfile:", pidfile)
 422         else S_YNO("hide-identity:", hide_identity)
 423         else S_YNO("hide-version:", hide_version)
 424         else S_STR("identity:", identity)
 425         else S_STR("version:", version)
 426         else S_STRLIST("root-hints:", root_hints)
 427         else S_STR("target-fetch-policy:", target_fetch_policy)
 428         else S_YNO("harden-glue:", harden_glue)
 429         else S_YNO("harden-short-bufsize:", harden_short_bufsize)
 430         else S_YNO("harden-large-queries:", harden_large_queries)
 431         else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
 432         else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
 433         else S_YNO("harden-referral-path:", harden_referral_path)
 434         else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
 435         else S_YNO("use-caps-for-id", use_caps_bits_for_id)
 436         else S_STRLIST("caps-whitelist:", caps_whitelist)
 437         else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
 438         else S_STRLIST("private-address:", private_address)
 439         else S_STRLIST("private-domain:", private_domain)
 440         else S_YNO("do-not-query-localhost:", donotquery_localhost)
 441         else S_STRLIST("do-not-query-address:", donotqueryaddrs)
 442         else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list)
 443         else S_STRLIST("trust-anchor-file:", trust_anchor_file_list)
 444         else S_STRLIST("trust-anchor:", trust_anchor_list)
 445         else S_STRLIST("trusted-keys-file:", trusted_keys_file_list)
 446         else S_STR("dlv-anchor-file:", dlv_anchor_file)
 447         else S_STRLIST("dlv-anchor:", dlv_anchor_list)
 448         else S_STRLIST("domain-insecure:", domain_insecure)
 449         else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl)
 450         else S_YNO("val-clean-additional:", val_clean_additional)
 451         else S_NUMBER_OR_ZERO("val-log-level:", val_log_level)
 452         else S_YNO("val-log-squelch:", val_log_squelch)
 453         else S_YNO("log-queries:", log_queries)
 454         else S_YNO("val-permissive-mode:", val_permissive_mode)
 455         else S_YNO("ignore-cd-flag:", ignore_cd)
 456         else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
 457         else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown)
 458         else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown)
 459         else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing)
 460         else if(strcmp(opt, "permit-small-holddown:") == 0)
 461         { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0);
 462           autr_permit_small_holddown = cfg->permit_small_holddown; }
 463         else S_MEMSIZE("key-cache-size:", key_cache_size)
 464         else S_POW2("key-cache-slabs:", key_cache_slabs)
 465         else S_MEMSIZE("neg-cache-size:", neg_cache_size)
 466         else S_YNO("minimal-responses:", minimal_responses)
 467         else S_YNO("rrset-roundrobin:", rrset_roundrobin)
 468         else S_STRLIST("local-data:", local_data)
 469         else S_YNO("unblock-lan-zones:", unblock_lan_zones)
 470         else S_YNO("insecure-lan-zones:", insecure_lan_zones)
 471         else S_YNO("control-enable:", remote_control_enable)
 472         else S_STRLIST("control-interface:", control_ifs)
 473         else S_NUMBER_NONZERO("control-port:", control_port)
 474         else S_STR("server-key-file:", server_key_file)
 475         else S_STR("server-cert-file:", server_cert_file)
 476         else S_STR("control-key-file:", control_key_file)
 477         else S_STR("control-cert-file:", control_cert_file)
 478         else S_STR("module-config:", module_conf)
 479         else S_STR("python-script:", python_script)
 480         else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check)
 481         else if(strcmp(opt, "ratelimit:") == 0) {
 482             IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val);
 483             infra_dp_ratelimit=cfg->ratelimit;
 484         }
 485         else S_MEMSIZE("ratelimit-size:", ratelimit_size)
 486         else S_POW2("ratelimit-slabs:", ratelimit_slabs)
 487         else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor)
 488         else S_YNO("qname-minimisation:", qname_minimisation)
 489         else if(strcmp(opt, "define-tag:") ==0) {
 490                 return config_add_tag(cfg, val);
 491         /* val_sig_skew_min and max are copied into val_env during init,
 492          * so this does not update val_env with set_option */
 493         } else if(strcmp(opt, "val-sig-skew-min:") == 0)
 494         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); }
 495         else if(strcmp(opt, "val-sig-skew-max:") == 0)
 496         { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); }
 497         else if (strcmp(opt, "outgoing-interface:") == 0) {
 498                 char* d = strdup(val);
 499                 char** oi =
 500                 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
 501                 if(!d || !oi) { free(d); free(oi); return -1; }
 502                 if(cfg->out_ifs && cfg->num_out_ifs) {
 503                         memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*));
 504                         free(cfg->out_ifs);
 505                 }
 506                 oi[cfg->num_out_ifs++] = d;
 507                 cfg->out_ifs = oi;
 508         } else {
 509                 /* unknown or unsupported (from the set_option interface):
 510                  * interface, outgoing-interface, access-control,
 511                  * stub-zone, name, stub-addr, stub-host, stub-prime
 512                  * forward-first, stub-first,
 513                  * forward-zone, name, forward-addr, forward-host,
 514                  * ratelimit-for-domain, ratelimit-below-domain,
 515                  * local-zone-tag */
 516                 return 0;
 517         }
 518         return 1;
 519 }
 520
 521 void config_print_func(char* line, void* arg)
 522 {
 523         FILE* f = (FILE*)arg;
 524         (void)fprintf(f, "%s\n", line);
 525 }
 526
 527 /** collate func arg */
 528 struct config_collate_arg {
 529         /** list of result items */
 530         struct config_strlist_head list;
 531         /** if a malloc error occurred, 0 is OK */
 532         int status;
 533 };
 534
 535 void config_collate_func(char* line, void* arg)
 536 {
 537         struct config_collate_arg* m = (struct config_collate_arg*)arg;
 538         if(m->status)
 539                 return;
 540         if(!cfg_strlist_append(&m->list, strdup(line)))
 541                 m->status = 1;
 542 }
 543
 544 int config_get_option_list(struct config_file* cfg, const char* opt,
 545         struct config_strlist** list)
 546 {
 547         struct config_collate_arg m;
 548         memset(&m, 0, sizeof(m));
 549         *list = NULL;
 550         if(!config_get_option(cfg, opt, config_collate_func, &m))
 551                 return 1;
 552         if(m.status) {
 553                 config_delstrlist(m.list.first);
 554                 return 2;
 555         }
 556         *list = m.list.first;
 557         return 0;
 558 }
 559
 560 int
 561 config_get_option_collate(struct config_file* cfg, const char* opt, char** str)
 562 {
 563         struct config_strlist* list = NULL;
 564         int r;
 565         *str = NULL;
 566         if((r = config_get_option_list(cfg, opt, &list)) != 0)
 567                 return r;
 568         *str = config_collate_cat(list);
 569         config_delstrlist(list);
 570         if(!*str) return 2;
 571         return 0;
 572 }
 573
 574 char*
 575 config_collate_cat(struct config_strlist* list)
 576 {
 577         size_t total = 0, left;
 578         struct config_strlist* s;
 579         char *r, *w;
 580         if(!list) /* no elements */
 581                 return strdup("");
 582         if(list->next == NULL) /* one element , no newline at end. */
 583                 return strdup(list->str);
 584         /* count total length */
 585         for(s=list; s; s=s->next)
 586                 total += strlen(s->str) + 1; /* len + newline */
 587         left = total+1; /* one extra for nul at end */
 588         r = malloc(left);
 589         if(!r)
 590                 return NULL;
 591         w = r;
 592         for(s=list; s; s=s->next) {
 593                 size_t this = strlen(s->str);
 594                 if(this+2 > left) { /* sanity check */
 595                         free(r);
 596                         return NULL;
 597                 }
 598                 snprintf(w, left, "%s\n", s->str);
 599                 this = strlen(w);
 600                 w += this;
 601                 left -= this;
 602         }
 603         return r;
 604 }
 605
 606 /** compare and print decimal option */
 607 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \
 608         {snprintf(buf, len, "%d", (int)cfg->var); \
 609         func(buf, arg);}
 610 /** compare and print unsigned option */
 611 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \
 612         {snprintf(buf, len, "%u", (unsigned)cfg->var); \
 613         func(buf, arg);}
 614 /** compare and print yesno option */
 615 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \
 616         {func(cfg->var?"yes":"no", arg);}
 617 /** compare and print string option */
 618 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \
 619         {func(cfg->var?cfg->var:"", arg);}
 620 /** compare and print array option */
 621 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \
 622         {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);}
 623 /** compare and print memorysize option */
 624 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \
 625         if(cfg->var > 1024*1024*1024) { \
 626           size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \
 627           snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \
 628         } else snprintf(buf, len, "%u", (unsigned)cfg->var); \
 629         func(buf, arg);}
 630 /** compare and print list option */
 631 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \
 632         struct config_strlist* p = cfg->lst; \
 633         for(p = cfg->lst; p; p = p->next) \
 634                 func(p->str, arg); \
 635         }
 636 /** compare and print list option */
 637 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \
 638         struct config_str2list* p = cfg->lst; \
 639         for(p = cfg->lst; p; p = p->next) { \
 640                 snprintf(buf, len, "%s %s", p->str, p->str2); \
 641                 func(buf, arg); \
 642         } \
 643         }
 644 /** compare and print list option */
 645 #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \
 646         struct config_str3list* p = cfg->lst; \
 647         for(p = cfg->lst; p; p = p->next) { \
 648                 snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \
 649                 func(buf, arg); \
 650         } \
 651         }
 652 /** compare and print taglist option */
 653 #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \
 654         char* tmpstr = NULL; \
 655         struct config_strbytelist *p = cfg->lst; \
 656         for(p = cfg->lst; p; p = p->next) {\
 657                 tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \
 658                 if(tmpstr) {\
 659                         snprintf(buf, len, "%s %s", p->str, tmpstr); \
 660                         func(buf, arg); \
 661                         free(tmpstr); \
 662                 } \
 663         } \
 664         }
 665
 666 int
 667 config_get_option(struct config_file* cfg, const char* opt,
 668         void (*func)(char*,void*), void* arg)
 669 {
 670         char buf[1024];
 671         size_t len = sizeof(buf);
 672         fptr_ok(fptr_whitelist_print_func(func));
 673         O_DEC(opt, "verbosity", verbosity)
 674         else O_DEC(opt, "statistics-interval", stat_interval)
 675         else O_YNO(opt, "statistics-cumulative", stat_cumulative)
 676         else O_YNO(opt, "extended-statistics", stat_extended)
 677         else O_YNO(opt, "use-syslog", use_syslog)
 678         else O_YNO(opt, "log-time-ascii", log_time_ascii)
 679         else O_DEC(opt, "num-threads", num_threads)
 680         else O_IFC(opt, "interface", num_ifs, ifs)
 681         else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
 682         else O_YNO(opt, "interface-automatic", if_automatic)
 683         else O_DEC(opt, "port", port)
 684         else O_DEC(opt, "outgoing-range", outgoing_num_ports)
 685         else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
 686         else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
 687         else O_DEC(opt, "edns-buffer-size", edns_buffer_size)
 688         else O_DEC(opt, "msg-buffer-size", msg_buffer_size)
 689         else O_MEM(opt, "msg-cache-size", msg_cache_size)
 690         else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs)
 691         else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread)
 692         else O_UNS(opt, "jostle-timeout", jostle_time)
 693         else O_MEM(opt, "so-rcvbuf", so_rcvbuf)
 694         else O_MEM(opt, "so-sndbuf", so_sndbuf)
 695         else O_YNO(opt, "so-reuseport", so_reuseport)
 696         else O_YNO(opt, "ip-transparent", ip_transparent)
 697         else O_YNO(opt, "ip-freebind", ip_freebind)
 698         else O_MEM(opt, "rrset-cache-size", rrset_cache_size)
 699         else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs)
 700         else O_YNO(opt, "prefetch-key", prefetch_key)
 701         else O_YNO(opt, "prefetch", prefetch)
 702         else O_DEC(opt, "cache-max-ttl", max_ttl)
 703         else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
 704         else O_DEC(opt, "cache-min-ttl", min_ttl)
 705         else O_DEC(opt, "infra-host-ttl", host_ttl)
 706         else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
 707         else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt)
 708         else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts)
 709         else O_UNS(opt, "delay-close", delay_close)
 710         else O_YNO(opt, "do-ip4", do_ip4)
 711         else O_YNO(opt, "do-ip6", do_ip6)
 712         else O_YNO(opt, "do-udp", do_udp)
 713         else O_YNO(opt, "do-tcp", do_tcp)
 714         else O_YNO(opt, "tcp-upstream", tcp_upstream)
 715         else O_DEC(opt, "tcp-mss", tcp_mss)
 716         else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss)
 717         else O_YNO(opt, "ssl-upstream", ssl_upstream)
 718         else O_STR(opt, "ssl-service-key", ssl_service_key)
 719         else O_STR(opt, "ssl-service-pem", ssl_service_pem)
 720         else O_DEC(opt, "ssl-port", ssl_port)
 721         else O_YNO(opt, "do-daemonize", do_daemonize)
 722         else O_STR(opt, "chroot", chrootdir)
 723         else O_STR(opt, "username", username)
 724         else O_STR(opt, "directory", directory)
 725         else O_STR(opt, "logfile", logfile)
 726         else O_YNO(opt, "log-queries", log_queries)
 727         else O_STR(opt, "pidfile", pidfile)
 728         else O_YNO(opt, "hide-identity", hide_identity)
 729         else O_YNO(opt, "hide-version", hide_version)
 730         else O_STR(opt, "identity", identity)
 731         else O_STR(opt, "version", version)
 732         else O_STR(opt, "target-fetch-policy", target_fetch_policy)
 733         else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize)
 734         else O_YNO(opt, "harden-large-queries", harden_large_queries)
 735         else O_YNO(opt, "harden-glue", harden_glue)
 736         else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
 737         else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
 738         else O_YNO(opt, "harden-referral-path", harden_referral_path)
 739         else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
 740         else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
 741         else O_LST(opt, "caps-whitelist", caps_whitelist)
 742         else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
 743         else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)
 744         else O_STR(opt, "module-config", module_conf)
 745         else O_STR(opt, "dlv-anchor-file", dlv_anchor_file)
 746         else O_DEC(opt, "val-bogus-ttl", bogus_ttl)
 747         else O_YNO(opt, "val-clean-additional", val_clean_additional)
 748         else O_DEC(opt, "val-log-level", val_log_level)
 749         else O_YNO(opt, "val-permissive-mode", val_permissive_mode)
 750         else O_YNO(opt, "ignore-cd-flag", ignore_cd)
 751         else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations)
 752         else O_UNS(opt, "add-holddown", add_holddown)
 753         else O_UNS(opt, "del-holddown", del_holddown)
 754         else O_UNS(opt, "keep-missing", keep_missing)
 755         else O_YNO(opt, "permit-small-holddown", permit_small_holddown)
 756         else O_MEM(opt, "key-cache-size", key_cache_size)
 757         else O_DEC(opt, "key-cache-slabs", key_cache_slabs)
 758         else O_MEM(opt, "neg-cache-size", neg_cache_size)
 759         else O_YNO(opt, "control-enable", remote_control_enable)
 760         else O_DEC(opt, "control-port", control_port)
 761         else O_STR(opt, "server-key-file", server_key_file)
 762         else O_STR(opt, "server-cert-file", server_cert_file)
 763         else O_STR(opt, "control-key-file", control_key_file)
 764         else O_STR(opt, "control-cert-file", control_cert_file)
 765         else O_LST(opt, "root-hints", root_hints)
 766         else O_LS2(opt, "access-control", acls)
 767         else O_LST(opt, "do-not-query-address", donotqueryaddrs)
 768         else O_LST(opt, "private-address", private_address)
 769         else O_LST(opt, "private-domain", private_domain)
 770         else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list)
 771         else O_LST(opt, "trust-anchor-file", trust_anchor_file_list)
 772         else O_LST(opt, "trust-anchor", trust_anchor_list)
 773         else O_LST(opt, "trusted-keys-file", trusted_keys_file_list)
 774         else O_LST(opt, "dlv-anchor", dlv_anchor_list)
 775         else O_LST(opt, "control-interface", control_ifs)
 776         else O_LST(opt, "domain-insecure", domain_insecure)
 777         else O_UNS(opt, "val-override-date", val_date_override)
 778         else O_YNO(opt, "minimal-responses", minimal_responses)
 779         else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
 780         else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones)
 781         else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones)
 782         else O_DEC(opt, "max-udp-size", max_udp_size)
 783         else O_STR(opt, "python-script", python_script)
 784         else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check)
 785         else O_DEC(opt, "ratelimit", ratelimit)
 786         else O_MEM(opt, "ratelimit-size", ratelimit_size)
 787         else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs)
 788         else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain)
 789         else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain)
 790         else O_DEC(opt, "ratelimit-factor", ratelimit_factor)
 791         else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min)
 792         else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max)
 793         else O_YNO(opt, "qname-minimisation", qname_minimisation)
 794         else O_IFC(opt, "define-tag", num_tags, tagname)
 795         else O_LTG(opt, "local-zone-tag", local_zone_tags)
 796         else O_LTG(opt, "access-control-tag", acl_tags)
 797         else O_LS3(opt, "local-zone-override", local_zone_overrides)
 798         else O_LS3(opt, "access-control-tag-action", acl_tag_actions)
 799         else O_LS3(opt, "access-control-tag-data", acl_tag_datas)
 800         /* not here:
 801          * outgoing-permit, outgoing-avoid - have list of ports
 802          * local-zone - zones and nodefault variables
 803          * local-data - see below
 804          * local-data-ptr - converted to local-data entries
 805          * stub-zone, name, stub-addr, stub-host, stub-prime
 806          * forward-zone, name, forward-addr, forward-host
 807          */
 808         else return 0;
 809         return 1;
 810 }
 811
 812 /** initialize the global cfg_parser object */
 813 static void
 814 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
 815 {
 816         static struct config_parser_state st;
 817         cfg_parser = &st;
 818         cfg_parser->filename = filename;
 819         cfg_parser->line = 1;
 820         cfg_parser->errors = 0;
 821         cfg_parser->cfg = cfg;
 822         cfg_parser->chroot = chroot;
 823         init_cfg_parse();
 824 }
 825
 826 int
 827 config_read(struct config_file* cfg, const char* filename, const char* chroot)
 828 {
 829         FILE *in;
 830         char *fname = (char*)filename;
 831 #ifdef HAVE_GLOB
 832         glob_t g;
 833         size_t i;
 834         int r, flags;
 835 #endif
 836         if(!fname)
 837                 return 1;
 838
 839         /* check for wildcards */
 840 #ifdef HAVE_GLOB
 841         if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') &&
 842                 !strchr(fname, '{') && !strchr(fname, '~'))) {
 843                 verbose(VERB_QUERY, "wildcard found, processing %s", fname);
 844                 flags = 0
 845 #ifdef GLOB_ERR
 846                         | GLOB_ERR
 847 #endif
 848 #ifdef GLOB_NOSORT
 849                         | GLOB_NOSORT
 850 #endif
 851 #ifdef GLOB_BRACE
 852                         | GLOB_BRACE
 853 #endif
 854 #ifdef GLOB_TILDE
 855                         | GLOB_TILDE
 856 #endif
 857                 ;
 858                 memset(&g, 0, sizeof(g));
 859                 r = glob(fname, flags, NULL, &g);
 860                 if(r) {
 861                         /* some error */
 862                         globfree(&g);
 863                         if(r == GLOB_NOMATCH) {
 864                                 verbose(VERB_QUERY, "include: "
 865                                 "no matches for %s", fname);
 866                                 return 1;
 867                         } else if(r == GLOB_NOSPACE) {
 868                                 log_err("include: %s: "
 869                                         "fnametern out of memory", fname);
 870                         } else if(r == GLOB_ABORTED) {
 871                                 log_err("wildcard include: %s: expansion "
 872                                         "aborted (%s)", fname, strerror(errno));
 873                         } else {
 874                                 log_err("wildcard include: %s: expansion "
 875                                         "failed (%s)", fname, strerror(errno));
 876                         }
 877                         /* ignore globs that yield no files */
 878                         return 1;
 879                 }
 880                 /* process files found, if any */
 881                 for(i=0; i<(size_t)g.gl_pathc; i++) {
 882                         if(!config_read(cfg, g.gl_pathv[i], chroot)) {
 883                                 log_err("error reading wildcard "
 884                                         "include: %s", g.gl_pathv[i]);
 885                                 globfree(&g);
 886                                 return 0;
 887                         }
 888                 }
 889                 globfree(&g);
 890                 return 1;
 891         }
 892 #endif /* HAVE_GLOB */
 893
 894         in = fopen(fname, "r");
 895         if(!in) {
 896                 log_err("Could not open %s: %s", fname, strerror(errno));
 897                 return 0;
 898         }
 899         create_cfg_parser(cfg, fname, chroot);
 900         ub_c_in = in;
 901         ub_c_parse();
 902         fclose(in);
 903
 904         if(cfg_parser->errors != 0) {
 905                 fprintf(stderr, "read %s failed: %d errors in configuration file\n",
 906                         fname, cfg_parser->errors);
 907                 errno=EINVAL;
 908                 return 0;
 909         }
 910
 911         return 1;
 912 }
 913
 914 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm)
 915 {
 916         struct config_stub* p = *(*pp);
 917         while(p) {
 918                 if(strcmp(p->name, nm) == 0)
 919                         return p;
 920                 (*pp) = &p->next;
 921                 p = p->next;
 922         }
 923         return NULL;
 924 }
 925
 926 void
 927 config_delstrlist(struct config_strlist* p)
 928 {
 929         struct config_strlist *np;
 930         while(p) {
 931                 np = p->next;
 932                 free(p->str);
 933                 free(p);
 934                 p = np;
 935         }
 936 }
 937
 938 void
 939 config_deldblstrlist(struct config_str2list* p)
 940 {
 941         struct config_str2list *np;
 942         while(p) {
 943                 np = p->next;
 944                 free(p->str);
 945                 free(p->str2);
 946                 free(p);
 947                 p = np;
 948         }
 949 }
 950
 951 void
 952 config_deltrplstrlist(struct config_str3list* p)
 953 {
 954         struct config_str3list *np;
 955         while(p) {
 956                 np = p->next;
 957                 free(p->str);
 958                 free(p->str2);
 959                 free(p->str3);
 960                 free(p);
 961                 p = np;
 962         }
 963 }
 964
 965 void
 966 config_delstub(struct config_stub* p)
 967 {
 968         if(!p) return;
 969         free(p->name);
 970         config_delstrlist(p->hosts);
 971         config_delstrlist(p->addrs);
 972         free(p);
 973 }
 974
 975 void
 976 config_delstubs(struct config_stub* p)
 977 {
 978         struct config_stub* np;
 979         while(p) {
 980                 np = p->next;
 981                 config_delstub(p);
 982                 p = np;
 983         }
 984 }
 985
 986 /** delete string array */
 987 static void
 988 config_del_strarray(char** array, int num)
 989 {
 990         int i;
 991         if(!array)
 992                 return;
 993         for(i=0; i<num; i++) {
 994                 free(array[i]);
 995         }
 996         free(array);
 997 }
 998
 999 void
1000 config_del_strbytelist(struct config_strbytelist* p)
1001 {
1002         struct config_strbytelist* np;
1003         while(p) {
1004                 np = p->next;
1005                 free(p->str);
1006                 free(p->str2);
1007                 free(p);
1008                 p = np;
1009         }
1010 }
1011
1012 void
1013 config_delete(struct config_file* cfg)
1014 {
1015         if(!cfg) return;
1016         free(cfg->username);
1017         free(cfg->chrootdir);
1018         free(cfg->directory);
1019         free(cfg->logfile);
1020         free(cfg->pidfile);
1021         free(cfg->target_fetch_policy);
1022         free(cfg->ssl_service_key);
1023         free(cfg->ssl_service_pem);
1024         config_del_strarray(cfg->ifs, cfg->num_ifs);
1025         config_del_strarray(cfg->out_ifs, cfg->num_out_ifs);
1026         config_delstubs(cfg->stubs);
1027         config_delstubs(cfg->forwards);
1028         config_delstrlist(cfg->donotqueryaddrs);
1029         config_delstrlist(cfg->root_hints);
1030         free(cfg->identity);
1031         free(cfg->version);
1032         free(cfg->module_conf);
1033         free(cfg->outgoing_avail_ports);
1034         config_delstrlist(cfg->caps_whitelist);
1035         config_delstrlist(cfg->private_address);
1036         config_delstrlist(cfg->private_domain);
1037         config_delstrlist(cfg->auto_trust_anchor_file_list);
1038         config_delstrlist(cfg->trust_anchor_file_list);
1039         config_delstrlist(cfg->trusted_keys_file_list);
1040         config_delstrlist(cfg->trust_anchor_list);
1041         config_delstrlist(cfg->domain_insecure);
1042         free(cfg->dlv_anchor_file);
1043         config_delstrlist(cfg->dlv_anchor_list);
1044         config_deldblstrlist(cfg->acls);
1045         free(cfg->val_nsec3_key_iterations);
1046         config_deldblstrlist(cfg->local_zones);
1047         config_delstrlist(cfg->local_zones_nodefault);
1048         config_delstrlist(cfg->local_data);
1049         config_deltrplstrlist(cfg->local_zone_overrides);
1050         config_del_strarray(cfg->tagname, cfg->num_tags);
1051         config_del_strbytelist(cfg->local_zone_tags);
1052         config_del_strbytelist(cfg->acl_tags);
1053         config_deltrplstrlist(cfg->acl_tag_actions);
1054         config_deltrplstrlist(cfg->acl_tag_datas);
1055         config_delstrlist(cfg->control_ifs);
1056         free(cfg->server_key_file);
1057         free(cfg->server_cert_file);
1058         free(cfg->control_key_file);
1059         free(cfg->control_cert_file);
1060         free(cfg->dns64_prefix);
1061         free(cfg->dnstap_socket_path);
1062         free(cfg->dnstap_identity);
1063         free(cfg->dnstap_version);
1064         config_deldblstrlist(cfg->ratelimit_for_domain);
1065         config_deldblstrlist(cfg->ratelimit_below_domain);
1066         free(cfg);
1067 }
1068
1069 static void
1070 init_outgoing_availports(int* a, int num)
1071 {
1072         /* generated with make iana_update */
1073         const int iana_assigned[] = {
1074 #include "util/iana_ports.inc"
1075                 -1 }; /* end marker to put behind trailing comma */
1076
1077         int i;
1078         /* do not use <1024, that could be trouble with the system, privs */
1079         for(i=1024; i<num; i++) {
1080                 a[i] = i;
1081         }
1082         /* create empty spot at 49152 to keep ephemeral ports available
1083          * to other programs */
1084         for(i=49152; i<49152+256; i++)
1085                 a[i] = 0;
1086         /* pick out all the IANA assigned ports */
1087         for(i=0; iana_assigned[i]!=-1; i++) {
1088                 if(iana_assigned[i] < num)
1089                         a[iana_assigned[i]] = 0;
1090         }
1091 }
1092
1093 int
1094 cfg_mark_ports(const char* str, int allow, int* avail, int num)
1095 {
1096         char* mid = strchr(str, '-');
1097         if(!mid) {
1098                 int port = atoi(str);
1099                 if(port == 0 && strcmp(str, "0") != 0) {
1100                         log_err("cannot parse port number '%s'", str);
1101                         return 0;
1102                 }
1103                 if(port < num)
1104                         avail[port] = (allow?port:0);
1105         } else {
1106                 int i, low, high = atoi(mid+1);
1107                 char buf[16];
1108                 if(high == 0 && strcmp(mid+1, "0") != 0) {
1109                         log_err("cannot parse port number '%s'", mid+1);
1110                         return 0;
1111                 }
1112                 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) {
1113                         log_err("cannot parse port number '%s'", str);
1114                         return 0;
1115                 }
1116                 if(mid > str)
1117                         memcpy(buf, str, (size_t)(mid-str));
1118                 buf[mid-str] = 0;
1119                 low = atoi(buf);
1120                 if(low == 0 && strcmp(buf, "0") != 0) {
1121                         log_err("cannot parse port number '%s'", buf);
1122                         return 0;
1123                 }
1124                 for(i=low; i<=high; i++) {
1125                         if(i < num)
1126                                 avail[i] = (allow?i:0);
1127                 }
1128                 return 1;
1129         }
1130         return 1;
1131 }
1132
1133 int
1134 cfg_scan_ports(int* avail, int num)
1135 {
1136         int i;
1137         int count = 0;
1138         for(i=0; i<num; i++) {
1139                 if(avail[i])
1140                         count++;
1141         }
1142         return count;
1143 }
1144
1145 int cfg_condense_ports(struct config_file* cfg, int** avail)
1146 {
1147         int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536);
1148         int i, at = 0;
1149         *avail = NULL;
1150         if(num == 0)
1151                 return 0;
1152         *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int));
1153         if(!*avail)
1154                 return 0;
1155         for(i=0; i<65536; i++) {
1156                 if(cfg->outgoing_avail_ports[i])
1157                         (*avail)[at++] = cfg->outgoing_avail_ports[i];
1158         }
1159         log_assert(at == num);
1160         return num;
1161 }
1162
1163 /** print error with file and line number */
1164 static void ub_c_error_va_list(const char *fmt, va_list args)
1165 {
1166         cfg_parser->errors++;
1167         fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
1168         cfg_parser->line);
1169         vfprintf(stderr, fmt, args);
1170         fprintf(stderr, "\n");
1171 }
1172
1173 /** print error with file and line number */
1174 void ub_c_error_msg(const char* fmt, ...)
1175 {
1176         va_list args;
1177         va_start(args, fmt);
1178         ub_c_error_va_list(fmt, args);
1179         va_end(args);
1180 }
1181
1182 void ub_c_error(const char *str)
1183 {
1184         cfg_parser->errors++;
1185         fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
1186                 cfg_parser->line, str);
1187 }
1188
1189 int ub_c_wrap(void)
1190 {
1191         return 1;
1192 }
1193
1194 int cfg_strlist_append(struct config_strlist_head* list, char* item)
1195 {
1196         struct config_strlist *s;
1197         if(!item || !list)
1198                 return 0;
1199         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1200         if(!s)
1201                 return 0;
1202         s->str = item;
1203         s->next = NULL;
1204         if(list->last)
1205                 list->last->next = s;
1206         else
1207                 list->first = s;
1208         list->last = s;
1209         return 1;
1210 }
1211
1212 int
1213 cfg_region_strlist_insert(struct regional* region,
1214         struct config_strlist** head, char* item)
1215 {
1216         struct config_strlist *s;
1217         if(!item || !head)
1218                 return 0;
1219         s = (struct config_strlist*)regional_alloc_zero(region,
1220                 sizeof(struct config_strlist));
1221         if(!s)
1222                 return 0;
1223         s->str = item;
1224         s->next = *head;
1225         *head = s;
1226         return 1;
1227 }
1228
1229 int
1230 cfg_strlist_insert(struct config_strlist** head, char* item)
1231 {
1232         struct config_strlist *s;
1233         if(!item || !head)
1234                 return 0;
1235         s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1236         if(!s)
1237                 return 0;
1238         s->str = item;
1239         s->next = *head;
1240         *head = s;
1241         return 1;
1242 }
1243
1244 int
1245 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
1246 {
1247         struct config_str2list *s;
1248         if(!item || !i2 || !head)
1249                 return 0;
1250         s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
1251         if(!s)
1252                 return 0;
1253         s->str = item;
1254         s->str2 = i2;
1255         s->next = *head;
1256         *head = s;
1257         return 1;
1258 }
1259
1260 int
1261 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2,
1262         char* i3)
1263 {
1264         struct config_str3list *s;
1265         if(!item || !i2 || !i3 || !head)
1266                 return 0;
1267         s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list));
1268         if(!s)
1269                 return 0;
1270         s->str = item;
1271         s->str2 = i2;
1272         s->str3 = i3;
1273         s->next = *head;
1274         *head = s;
1275         return 1;
1276 }
1277
1278 int
1279 cfg_strbytelist_insert(struct config_strbytelist** head, char* item,
1280         uint8_t* i2, size_t i2len)
1281 {
1282         struct config_strbytelist* s;
1283         if(!item || !i2 || !head)
1284                 return 0;
1285         s = (struct config_strbytelist*)calloc(1, sizeof(*s));
1286         if(!s)
1287                 return 0;
1288         s->str = item;
1289         s->str2 = i2;
1290         s->str2len = i2len;
1291         s->next = *head;
1292         *head = s;
1293         return 1;
1294 }
1295
1296 time_t
1297 cfg_convert_timeval(const char* str)
1298 {
1299         time_t t;
1300         struct tm tm;
1301         memset(&tm, 0, sizeof(tm));
1302         if(strlen(str) < 14)
1303                 return 0;
1304         if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
1305                 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
1306                 return 0;
1307         tm.tm_year -= 1900;
1308         tm.tm_mon--;
1309         /* Check values */
1310         if (tm.tm_year < 70)    return 0;
1311         if (tm.tm_mon < 0 || tm.tm_mon > 11)    return 0;
1312         if (tm.tm_mday < 1 || tm.tm_mday > 31)  return 0;
1313         if (tm.tm_hour < 0 || tm.tm_hour > 23)  return 0;
1314         if (tm.tm_min < 0 || tm.tm_min > 59)    return 0;
1315         if (tm.tm_sec < 0 || tm.tm_sec > 59)    return 0;
1316         /* call ldns conversion function */
1317         t = sldns_mktime_from_utc(&tm);
1318         return t;
1319 }
1320
1321 int
1322 cfg_count_numbers(const char* s)
1323 {
1324         /* format ::= (sp num)+ sp  */
1325         /* num ::= [-](0-9)+        */
1326         /* sp ::= (space|tab)*      */
1327         int num = 0;
1328         while(*s) {
1329                 while(*s && isspace((unsigned char)*s))
1330                         s++;
1331                 if(!*s) /* end of string */
1332                         break;
1333                 if(*s == '-')
1334                         s++;
1335                 if(!*s) /* only - not allowed */
1336                         return 0;
1337                 if(!isdigit((unsigned char)*s)) /* bad character */
1338                         return 0;
1339                 while(*s && isdigit((unsigned char)*s))
1340                         s++;
1341                 num++;
1342         }
1343         return num;
1344 }
1345
1346 /** all digit number */
1347 static int isalldigit(const char* str, size_t l)
1348 {
1349         size_t i;
1350         for(i=0; i<l; i++)
1351                 if(!isdigit((unsigned char)str[i]))
1352                         return 0;
1353         return 1;
1354 }
1355
1356 int
1357 cfg_parse_memsize(const char* str, size_t* res)
1358 {
1359         size_t len;
1360         size_t mult = 1;
1361         if(!str || (len=(size_t)strlen(str)) == 0) {
1362                 log_err("not a size: '%s'", str);
1363                 return 0;
1364         }
1365         if(isalldigit(str, len)) {
1366                 *res = (size_t)atol(str);
1367                 return 1;
1368         }
1369         /* check appended num */
1370         while(len>0 && str[len-1]==' ')
1371                 len--;
1372         if(len > 1 && str[len-1] == 'b')
1373                 len--;
1374         else if(len > 1 && str[len-1] == 'B')
1375                 len--;
1376
1377         if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
1378                 mult = 1024*1024*1024;
1379         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
1380                 mult = 1024*1024;
1381         else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k')
1382                 mult = 1024;
1383         else if(len > 0 && isdigit((unsigned char)str[len-1]))
1384                 mult = 1;
1385         else {
1386                 log_err("unknown size specifier: '%s'", str);
1387                 return 0;
1388         }
1389         while(len>1 && str[len-2]==' ')
1390                 len--;
1391
1392         if(!isalldigit(str, len-1)) {
1393                 log_err("unknown size specifier: '%s'", str);
1394                 return 0;
1395         }
1396         *res = ((size_t)atol(str)) * mult;
1397         return 1;
1398 }
1399
1400 int
1401 find_tag_id(struct config_file* cfg, const char* tag)
1402 {
1403         int i;
1404         for(i=0; i<cfg->num_tags; i++) {
1405                 if(strcmp(cfg->tagname[i], tag) == 0)
1406                         return i;
1407         }
1408         return -1;
1409 }
1410
1411 int
1412 config_add_tag(struct config_file* cfg, const char* tag)
1413 {
1414         char** newarray;
1415         char* newtag;
1416         if(find_tag_id(cfg, tag) != -1)
1417                 return 1; /* nothing to do */
1418         newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1));
1419         if(!newarray)
1420                 return 0;
1421         newtag = strdup(tag);
1422         if(!newtag) {
1423                 free(newarray);
1424                 return 0;
1425         }
1426         if(cfg->tagname) {
1427                 memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags);
1428                 free(cfg->tagname);
1429         }
1430         newarray[cfg->num_tags++] = newtag;
1431         cfg->tagname = newarray;
1432         return 1;
1433 }
1434
1435 /** set a bit in a bit array */
1436 static void
1437 cfg_set_bit(uint8_t* bitlist, size_t len, int id)
1438 {
1439         int pos = id/8;
1440         log_assert((size_t)pos < len);
1441         (void)len;
1442         bitlist[pos] |= 1<<(id%8);
1443 }
1444
1445 uint8_t* config_parse_taglist(struct config_file* cfg, char* str,
1446         size_t* listlen)
1447 {
1448         uint8_t* taglist = NULL;
1449         size_t len = 0;
1450         char* p, *s;
1451
1452         /* allocate */
1453         if(cfg->num_tags == 0) {
1454                 log_err("parse taglist, but no tags defined");
1455                 return 0;
1456         }
1457         len = (size_t)(cfg->num_tags+7)/8;
1458         taglist = calloc(1, len);
1459         if(!taglist) {
1460                 log_err("out of memory");
1461                 return 0;
1462         }
1463
1464         /* parse */
1465         s = str;
1466         while((p=strsep(&s, " \t\n")) != NULL) {
1467                 if(*p) {
1468                         int id = find_tag_id(cfg, p);
1469                         /* set this bit in the bitlist */
1470                         if(id == -1) {
1471                                 log_err("unknown tag: %s", p);
1472                                 free(taglist);
1473                                 return 0;
1474                         }
1475                         cfg_set_bit(taglist, len, id);
1476                 }
1477         }
1478
1479         *listlen = len;
1480         return taglist;
1481 }
1482
1483 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist,
1484         size_t taglen)
1485 {
1486         char buf[10240];
1487         size_t i, j, len = 0;
1488         buf[0] = 0;
1489         for(i=0; i<taglen; i++) {
1490                 if(taglist[i] == 0)
1491                         continue;
1492                 for(j=0; j<8; j++) {
1493                         if((taglist[i] & (1<<j)) != 0) {
1494                                 size_t id = i*8 + j;
1495                                 snprintf(buf+len, sizeof(buf)-len, "%s%s",
1496                                         (len==0?"":" "), cfg->tagname[id]);
1497                                 len += strlen(buf+len);
1498                         }
1499                 }
1500         }
1501         return strdup(buf);
1502 }
1503
1504 int taglist_intersect(uint8_t* list1, size_t list1len, uint8_t* list2,
1505         size_t list2len)
1506 {
1507         size_t i;
1508         if(!list1 || !list2)
1509                 return 0;
1510         for(i=0; i<list1len && i<list2len; i++) {
1511                 if((list1[i] & list2[i]) != 0)
1512                         return 1;
1513         }
1514         return 0;
1515 }
1516
1517 void
1518 config_apply(struct config_file* config)
1519 {
1520         MAX_TTL = (time_t)config->max_ttl;
1521         MIN_TTL = (time_t)config->min_ttl;
1522         MAX_NEG_TTL = (time_t)config->max_negative_ttl;
1523         RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
1524         EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
1525         MINIMAL_RESPONSES = config->minimal_responses;
1526         RRSET_ROUNDROBIN = config->rrset_roundrobin;
1527         log_set_time_asc(config->log_time_ascii);
1528         autr_permit_small_holddown = config->permit_small_holddown;
1529 }
1530
1531 void config_lookup_uid(struct config_file* cfg)
1532 {
1533 #ifdef HAVE_GETPWNAM
1534         /* translate username into uid and gid */
1535         if(cfg->username && cfg->username[0]) {
1536                 struct passwd *pwd;
1537                 if((pwd = getpwnam(cfg->username)) != NULL) {
1538                         cfg_uid = pwd->pw_uid;
1539                         cfg_gid = pwd->pw_gid;
1540                 }
1541         }
1542 #else
1543         (void)cfg;
1544 #endif
1545 }
1546
1547 /**
1548  * Calculate string length of full pathname in original filesys
1549  * @param fname: the path name to convert.
1550  *      Must not be null or empty.
1551  * @param cfg: config struct for chroot and chdir (if set).
1552  * @param use_chdir: if false, only chroot is applied.
1553  * @return length of string.
1554  *      remember to allocate one more for 0 at end in mallocs.
1555  */
1556 static size_t
1557 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
1558 {
1559         size_t len = 0;
1560         int slashit = 0;
1561         if(cfg->chrootdir && cfg->chrootdir[0] &&
1562                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
1563                 /* already full pathname, return it */
1564                 return strlen(fname);
1565         }
1566         /* chroot */
1567         if(cfg->chrootdir && cfg->chrootdir[0]) {
1568                 /* start with chrootdir */
1569                 len += strlen(cfg->chrootdir);
1570                 slashit = 1;
1571         }
1572         /* chdir */
1573 #ifdef UB_ON_WINDOWS
1574         if(fname[0] != 0 && fname[1] == ':') {
1575                 /* full path, no chdir */
1576         } else
1577 #endif
1578         if(fname[0] == '/' || !use_chdir) {
1579                 /* full path, no chdir */
1580         } else if(cfg->directory && cfg->directory[0]) {
1581                 /* prepend chdir */
1582                 if(slashit && cfg->directory[0] != '/')
1583                         len++;
1584                 if(cfg->chrootdir && cfg->chrootdir[0] &&
1585                         strncmp(cfg->chrootdir, cfg->directory,
1586                         strlen(cfg->chrootdir)) == 0)
1587                         len += strlen(cfg->directory)-strlen(cfg->chrootdir);
1588                 else    len += strlen(cfg->directory);
1589                 slashit = 1;
1590         }
1591         /* fname */
1592         if(slashit && fname[0] != '/')
1593                 len++;
1594         len += strlen(fname);
1595         return len;
1596 }
1597
1598 char*
1599 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
1600 {
1601         size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1;
1602         int slashit = 0;
1603         char* buf = (char*)malloc(len);
1604         if(!buf)
1605                 return NULL;
1606         buf[0] = 0;
1607         /* is fname already in chroot ? */
1608         if(cfg->chrootdir && cfg->chrootdir[0] &&
1609                 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
1610                 /* already full pathname, return it */
1611                 (void)strlcpy(buf, fname, len);
1612                 buf[len-1] = 0;
1613                 return buf;
1614         }
1615         /* chroot */
1616         if(cfg->chrootdir && cfg->chrootdir[0]) {
1617                 /* start with chrootdir */
1618                 (void)strlcpy(buf, cfg->chrootdir, len);
1619                 slashit = 1;
1620         }
1621 #ifdef UB_ON_WINDOWS
1622         if(fname[0] != 0 && fname[1] == ':') {
1623                 /* full path, no chdir */
1624         } else
1625 #endif
1626         /* chdir */
1627         if(fname[0] == '/' || !use_chdir) {
1628                 /* full path, no chdir */
1629         } else if(cfg->directory && cfg->directory[0]) {
1630                 /* prepend chdir */
1631                 if(slashit && cfg->directory[0] != '/')
1632                         (void)strlcat(buf, "/", len);
1633                 /* is the directory already in the chroot? */
1634                 if(cfg->chrootdir && cfg->chrootdir[0] &&
1635                         strncmp(cfg->chrootdir, cfg->directory,
1636                         strlen(cfg->chrootdir)) == 0)
1637                         (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
1638                                    len);
1639                 else (void)strlcat(buf, cfg->directory, len);
1640                 slashit = 1;
1641         }
1642         /* fname */
1643         if(slashit && fname[0] != '/')
1644                 (void)strlcat(buf, "/", len);
1645         (void)strlcat(buf, fname, len);
1646         buf[len-1] = 0;
1647         return buf;
1648 }
1649
1650 /** return next space character in string */
1651 static char* next_space_pos(const char* str)
1652 {
1653         char* sp = strchr(str, ' ');
1654         char* tab = strchr(str, '\t');
1655         if(!tab && !sp)
1656                 return NULL;
1657         if(!sp) return tab;
1658         if(!tab) return sp;
1659         return (sp<tab)?sp:tab;
1660 }
1661
1662 /** return last space character in string */
1663 static char* last_space_pos(const char* str)
1664 {
1665         char* sp = strrchr(str, ' ');
1666         char* tab = strrchr(str, '\t');
1667         if(!tab && !sp)
1668                 return NULL;
1669         if(!sp) return tab;
1670         if(!tab) return sp;
1671         return (sp>tab)?sp:tab;
1672 }
1673
1674 int
1675 cfg_parse_local_zone(struct config_file* cfg, const char* val)
1676 {
1677         const char *type, *name_end, *name;
1678         char buf[256];
1679
1680         /* parse it as: [zone_name] [between stuff] [zone_type] */
1681         name = val;
1682         while(*name && isspace((unsigned char)*name))
1683                 name++;
1684         if(!*name) {
1685                 log_err("syntax error: too short: %s", val);
1686                 return 0;
1687         }
1688         name_end = next_space_pos(name);
1689         if(!name_end || !*name_end) {
1690                 log_err("syntax error: expected zone type: %s", val);
1691                 return 0;
1692         }
1693         if (name_end - name > 255) {
1694                 log_err("syntax error: bad zone name: %s", val);
1695                 return 0;
1696         }
1697         (void)strlcpy(buf, name, sizeof(buf));
1698         buf[name_end-name] = '\0';
1699
1700         type = last_space_pos(name_end);
1701         while(type && *type && isspace((unsigned char)*type))
1702                 type++;
1703         if(!type || !*type) {
1704                 log_err("syntax error: expected zone type: %s", val);
1705                 return 0;
1706         }
1707
1708         if(strcmp(type, "nodefault")==0) {
1709                 return cfg_strlist_insert(&cfg->local_zones_nodefault,
1710                         strdup(name));
1711         } else {
1712                 return cfg_str2list_insert(&cfg->local_zones, strdup(buf),
1713                         strdup(type));
1714         }
1715 }
1716
1717 char* cfg_ptr_reverse(char* str)
1718 {
1719         char* ip, *ip_end;
1720         char* name;
1721         char* result;
1722         char buf[1024];
1723         struct sockaddr_storage addr;
1724         socklen_t addrlen;
1725
1726         /* parse it as: [IP] [between stuff] [name] */
1727         ip = str;
1728         while(*ip && isspace((unsigned char)*ip))
1729                 ip++;
1730         if(!*ip) {
1731                 log_err("syntax error: too short: %s", str);
1732                 return NULL;
1733         }
1734         ip_end = next_space_pos(ip);
1735         if(!ip_end || !*ip_end) {
1736                 log_err("syntax error: expected name: %s", str);
1737                 return NULL;
1738         }
1739
1740         name = last_space_pos(ip_end);
1741         if(!name || !*name) {
1742                 log_err("syntax error: expected name: %s", str);
1743                 return NULL;
1744         }
1745
1746         sscanf(ip, "%100s", buf);
1747         buf[sizeof(buf)-1]=0;
1748
1749         if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) {
1750                 log_err("syntax error: cannot parse address: %s", str);
1751                 return NULL;
1752         }
1753
1754         /* reverse IPv4:
1755          * ddd.ddd.ddd.ddd.in-addr-arpa.
1756          * IPv6: (h.){32}.ip6.arpa.  */
1757
1758         if(addr_is_ip6(&addr, addrlen)) {
1759                 uint8_t ad[16];
1760                 const char* hex = "0123456789abcdef";
1761                 char *p = buf;
1762                 int i;
1763                 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
1764                         sizeof(ad));
1765                 for(i=15; i>=0; i--) {
1766                         uint8_t b = ad[i];
1767                         *p++ = hex[ (b&0x0f) ];
1768                         *p++ = '.';
1769                         *p++ = hex[ (b&0xf0) >> 4 ];
1770                         *p++ = '.';
1771                 }
1772                 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
1773         } else {
1774                 uint8_t ad[4];
1775                 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
1776                         sizeof(ad));
1777                 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
1778                         (unsigned)ad[3], (unsigned)ad[2],
1779                         (unsigned)ad[1], (unsigned)ad[0]);
1780         }
1781
1782         /* printed the reverse address, now the between goop and name on end */
1783         while(*ip_end && isspace((unsigned char)*ip_end))
1784                 ip_end++;
1785         if(name>ip_end) {
1786                 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s",
1787                         (int)(name-ip_end), ip_end);
1788         }
1789         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name);
1790
1791         result = strdup(buf);
1792         if(!result) {
1793                 log_err("out of memory parsing %s", str);
1794                 return NULL;
1795         }
1796         return result;
1797 }
1798
1799 #ifdef UB_ON_WINDOWS
1800 char*
1801 w_lookup_reg_str(const char* key, const char* name)
1802 {
1803         HKEY hk = NULL;
1804         DWORD type = 0;
1805         BYTE buf[1024];
1806         DWORD len = (DWORD)sizeof(buf);
1807         LONG ret;
1808         char* result = NULL;
1809         ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
1810         if(ret == ERROR_FILE_NOT_FOUND)
1811                 return NULL; /* key does not exist */
1812         else if(ret != ERROR_SUCCESS) {
1813                 log_err("RegOpenKeyEx failed");
1814                 return NULL;
1815         }
1816         ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
1817         if(RegCloseKey(hk))
1818                 log_err("RegCloseKey");
1819         if(ret == ERROR_FILE_NOT_FOUND)
1820                 return NULL; /* name does not exist */
1821         else if(ret != ERROR_SUCCESS) {
1822                 log_err("RegQueryValueEx failed");
1823                 return NULL;
1824         }
1825         if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
1826                 buf[sizeof(buf)-1] = 0;
1827                 buf[sizeof(buf)-2] = 0; /* for multi_sz */
1828                 result = strdup((char*)buf);
1829                 if(!result) log_err("out of memory");
1830         }
1831         return result;
1832 }
1833
1834 void w_config_adjust_directory(struct config_file* cfg)
1835 {
1836         if(cfg->directory && cfg->directory[0]) {
1837                 TCHAR dirbuf[2*MAX_PATH+4];
1838                 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) {
1839                         /* get executable path, and if that contains
1840                          * directories, snip off the filename part */
1841                         dirbuf[0] = 0;
1842                         if(!GetModuleFileName(NULL, dirbuf, MAX_PATH))
1843                                 log_err("could not GetModuleFileName");
1844                         if(strrchr(dirbuf, '\\')) {
1845                                 (strrchr(dirbuf, '\\'))[0] = 0;
1846                         } else log_err("GetModuleFileName had no path");
1847                         if(dirbuf[0]) {
1848                                 /* adjust directory for later lookups to work*/
1849                                 free(cfg->directory);
1850                                 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1);
1851                         }
1852                 }
1853         }
1854 }
1855 #endif /* UB_ON_WINDOWS */
1856
1857 void errinf(struct module_qstate* qstate, const char* str)
1858 {
1859         struct config_strlist* p;
1860         if(qstate->env->cfg->val_log_level < 2 || !str)
1861                 return;
1862         p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p));
1863         if(!p) {
1864                 log_err("malloc failure in validator-error-info string");
1865                 return;
1866         }
1867         p->next = NULL;
1868         p->str = regional_strdup(qstate->region, str);
1869         if(!p->str) {
1870                 log_err("malloc failure in validator-error-info string");
1871                 return;
1872         }
1873         /* add at end */
1874         if(qstate->errinf) {
1875                 struct config_strlist* q = qstate->errinf;
1876                 while(q->next)
1877                         q = q->next;
1878                 q->next = p;
1879         } else  qstate->errinf = p;
1880 }
1881
1882 void errinf_origin(struct module_qstate* qstate, struct sock_list *origin)
1883 {
1884         struct sock_list* p;
1885         if(qstate->env->cfg->val_log_level < 2)
1886                 return;
1887         for(p=origin; p; p=p->next) {
1888                 char buf[256];
1889                 if(p == origin)
1890                         snprintf(buf, sizeof(buf), "from ");
1891                 else    snprintf(buf, sizeof(buf), "and ");
1892                 if(p->len == 0)
1893                         snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf),
1894                                 "cache");
1895                 else
1896                         addr_to_str(&p->addr, p->len, buf+strlen(buf),
1897                                 sizeof(buf)-strlen(buf));
1898                 errinf(qstate, buf);
1899         }
1900 }
1901
1902 char* errinf_to_str(struct module_qstate* qstate)
1903 {
1904         char buf[20480];
1905         char* p = buf;
1906         size_t left = sizeof(buf);
1907         struct config_strlist* s;
1908         char dname[LDNS_MAX_DOMAINLEN+1];
1909         char t[16], c[16];
1910         sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t));
1911         sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c));
1912         dname_str(qstate->qinfo.qname, dname);
1913         snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c);
1914         left -= strlen(p); p += strlen(p);
1915         if(!qstate->errinf)
1916                 snprintf(p, left, " misc failure");
1917         else for(s=qstate->errinf; s; s=s->next) {
1918                 snprintf(p, left, " %s", s->str);
1919                 left -= strlen(p); p += strlen(p);
1920         }
1921         p = strdup(buf);
1922         if(!p)
1923                 log_err("malloc failure in errinf_to_str");
1924         return p;
1925 }
1926
1927 void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr)
1928 {
1929         char buf[1024];
1930         char dname[LDNS_MAX_DOMAINLEN+1];
1931         char t[16], c[16];
1932         if(qstate->env->cfg->val_log_level < 2 || !rr)
1933                 return;
1934         sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t));
1935         sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c));
1936         dname_str(rr->rk.dname, dname);
1937         snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c);
1938         errinf(qstate, buf);
1939 }
1940
1941 void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname)
1942 {
1943         char b[1024];
1944         char buf[LDNS_MAX_DOMAINLEN+1];
1945         if(qstate->env->cfg->val_log_level < 2 || !str || !dname)
1946                 return;
1947         dname_str(dname, buf);
1948         snprintf(b, sizeof(b), "%s %s", str, buf);
1949         errinf(qstate, b);
1950 }