config_file.c revision 295691
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 */ 70uid_t cfg_uid = (uid_t)-1; 71/** from cfg username, after daemonise setup performed */ 72gid_t cfg_gid = (gid_t)-1; 73/** for debug allow small timeout values for fast rollovers */ 74int autr_permit_small_holddown = 0; 75 76/** global config during parsing */ 77struct config_parser_state* cfg_parser = 0; 78 79/** init ports possible for use */ 80static void init_outgoing_availports(int* array, int num); 81 82struct config_file* 83config_create(void) 84{ 85 struct config_file* cfg; 86 cfg = (struct config_file*)calloc(1, sizeof(struct config_file)); 87 if(!cfg) 88 return NULL; 89 /* the defaults if no config is present */ 90 cfg->verbosity = 1; 91 cfg->stat_interval = 0; 92 cfg->stat_cumulative = 0; 93 cfg->stat_extended = 0; 94 cfg->num_threads = 1; 95 cfg->port = UNBOUND_DNS_PORT; 96 cfg->do_ip4 = 1; 97 cfg->do_ip6 = 1; 98 cfg->do_udp = 1; 99 cfg->do_tcp = 1; 100 cfg->tcp_upstream = 0; 101 cfg->ssl_service_key = NULL; 102 cfg->ssl_service_pem = NULL; 103 cfg->ssl_port = 853; 104 cfg->ssl_upstream = 0; 105 cfg->use_syslog = 1; 106 cfg->log_time_ascii = 0; 107 cfg->log_queries = 0; 108#ifndef USE_WINSOCK 109# ifdef USE_MINI_EVENT 110 /* select max 1024 sockets */ 111 cfg->outgoing_num_ports = 960; 112 cfg->num_queries_per_thread = 512; 113# else 114 /* libevent can use many sockets */ 115 cfg->outgoing_num_ports = 4096; 116 cfg->num_queries_per_thread = 1024; 117# endif 118 cfg->outgoing_num_tcp = 10; 119 cfg->incoming_num_tcp = 10; 120#else 121 cfg->outgoing_num_ports = 48; /* windows is limited in num fds */ 122 cfg->num_queries_per_thread = 24; 123 cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */ 124 cfg->incoming_num_tcp = 2; 125#endif 126 cfg->edns_buffer_size = 4096; /* 4k from rfc recommendation */ 127 cfg->msg_buffer_size = 65552; /* 64 k + a small margin */ 128 cfg->msg_cache_size = 4 * 1024 * 1024; 129 cfg->msg_cache_slabs = 4; 130 cfg->jostle_time = 200; 131 cfg->rrset_cache_size = 4 * 1024 * 1024; 132 cfg->rrset_cache_slabs = 4; 133 cfg->host_ttl = 900; 134 cfg->bogus_ttl = 60; 135 cfg->min_ttl = 0; 136 cfg->max_ttl = 3600 * 24; 137 cfg->max_negative_ttl = 3600; 138 cfg->prefetch = 0; 139 cfg->prefetch_key = 0; 140 cfg->infra_cache_slabs = 4; 141 cfg->infra_cache_numhosts = 10000; 142 cfg->infra_cache_min_rtt = 50; 143 cfg->delay_close = 0; 144 if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int)))) 145 goto error_exit; 146 init_outgoing_availports(cfg->outgoing_avail_ports, 65536); 147 if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit; 148#ifdef HAVE_CHROOT 149 if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit; 150#endif 151 if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit; 152 if(!(cfg->logfile = strdup(""))) goto error_exit; 153 if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit; 154 if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit; 155 cfg->donotqueryaddrs = NULL; 156 cfg->donotquery_localhost = 1; 157 cfg->root_hints = NULL; 158 cfg->do_daemonize = 1; 159 cfg->if_automatic = 0; 160 cfg->so_rcvbuf = 0; 161 cfg->so_sndbuf = 0; 162 cfg->so_reuseport = 0; 163 cfg->ip_transparent = 0; 164 cfg->num_ifs = 0; 165 cfg->ifs = NULL; 166 cfg->num_out_ifs = 0; 167 cfg->out_ifs = NULL; 168 cfg->stubs = NULL; 169 cfg->forwards = NULL; 170 cfg->acls = NULL; 171 cfg->harden_short_bufsize = 0; 172 cfg->harden_large_queries = 0; 173 cfg->harden_glue = 1; 174 cfg->harden_dnssec_stripped = 1; 175 cfg->harden_below_nxdomain = 0; 176 cfg->harden_referral_path = 0; 177 cfg->harden_algo_downgrade = 0; 178 cfg->use_caps_bits_for_id = 0; 179 cfg->caps_whitelist = NULL; 180 cfg->private_address = NULL; 181 cfg->private_domain = NULL; 182 cfg->unwanted_threshold = 0; 183 cfg->hide_identity = 0; 184 cfg->hide_version = 0; 185 cfg->identity = NULL; 186 cfg->version = NULL; 187 cfg->auto_trust_anchor_file_list = NULL; 188 cfg->trust_anchor_file_list = NULL; 189 cfg->trust_anchor_list = NULL; 190 cfg->trusted_keys_file_list = NULL; 191 cfg->dlv_anchor_file = NULL; 192 cfg->dlv_anchor_list = NULL; 193 cfg->domain_insecure = NULL; 194 cfg->val_date_override = 0; 195 cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */ 196 cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */ 197 cfg->val_clean_additional = 1; 198 cfg->val_log_level = 0; 199 cfg->val_log_squelch = 0; 200 cfg->val_permissive_mode = 0; 201 cfg->ignore_cd = 0; 202 cfg->add_holddown = 30*24*3600; 203 cfg->del_holddown = 30*24*3600; 204 cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */ 205 cfg->permit_small_holddown = 0; 206 cfg->key_cache_size = 4 * 1024 * 1024; 207 cfg->key_cache_slabs = 4; 208 cfg->neg_cache_size = 1 * 1024 * 1024; 209 cfg->local_zones = NULL; 210 cfg->local_zones_nodefault = NULL; 211 cfg->local_data = NULL; 212 cfg->unblock_lan_zones = 0; 213 cfg->insecure_lan_zones = 0; 214 cfg->python_script = NULL; 215 cfg->remote_control_enable = 0; 216 cfg->control_ifs = NULL; 217 cfg->control_port = UNBOUND_CONTROL_PORT; 218 cfg->remote_control_use_cert = 1; 219 cfg->minimal_responses = 0; 220 cfg->rrset_roundrobin = 0; 221 cfg->max_udp_size = 4096; 222 if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key"))) 223 goto error_exit; 224 if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem"))) 225 goto error_exit; 226 if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key"))) 227 goto error_exit; 228 if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem"))) 229 goto error_exit; 230 231 if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit; 232 if(!(cfg->val_nsec3_key_iterations = 233 strdup("1024 150 2048 500 4096 2500"))) goto error_exit; 234#if defined(DNSTAP_SOCKET_PATH) 235 if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH))) 236 goto error_exit; 237#endif 238 cfg->ratelimit = 0; 239 cfg->ratelimit_slabs = 4; 240 cfg->ratelimit_size = 4*1024*1024; 241 cfg->ratelimit_for_domain = NULL; 242 cfg->ratelimit_below_domain = NULL; 243 cfg->ratelimit_factor = 10; 244 cfg->qname_minimisation = 0; 245 return cfg; 246error_exit: 247 config_delete(cfg); 248 return NULL; 249} 250 251struct config_file* config_create_forlib(void) 252{ 253 struct config_file* cfg = config_create(); 254 if(!cfg) return NULL; 255 /* modifications for library use, less verbose, less memory */ 256 free(cfg->chrootdir); 257 cfg->chrootdir = NULL; 258 cfg->verbosity = 0; 259 cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable' 260 and probably within the ulimit(maxfds) of the user */ 261 cfg->outgoing_num_tcp = 2; 262 cfg->msg_cache_size = 1024*1024; 263 cfg->msg_cache_slabs = 1; 264 cfg->rrset_cache_size = 1024*1024; 265 cfg->rrset_cache_slabs = 1; 266 cfg->infra_cache_slabs = 1; 267 cfg->use_syslog = 0; 268 cfg->key_cache_size = 1024*1024; 269 cfg->key_cache_slabs = 1; 270 cfg->neg_cache_size = 100 * 1024; 271 cfg->donotquery_localhost = 0; /* allow, so that you can ask a 272 forward nameserver running on localhost */ 273 cfg->val_log_level = 2; /* to fill why_bogus with */ 274 cfg->val_log_squelch = 1; 275 return cfg; 276} 277 278/** check that the value passed is >= 0 */ 279#define IS_NUMBER_OR_ZERO \ 280 if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0 281/** check that the value passed is > 0 */ 282#define IS_NONZERO_NUMBER \ 283 if(atoi(val) == 0) return 0 284/** check that the value passed is not 0 and a power of 2 */ 285#define IS_POW2_NUMBER \ 286 if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0 287/** check that the value passed is yes or no */ 288#define IS_YES_OR_NO \ 289 if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0 290/** put integer_or_zero into variable */ 291#define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 292 { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); } 293/** put integer_nonzero into variable */ 294#define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \ 295 { IS_NONZERO_NUMBER; cfg->var = atoi(val); } 296/** put integer_or_zero into unsigned */ 297#define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 298 { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); } 299/** put integer_or_zero into size_t */ 300#define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 301 { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); } 302/** put integer_nonzero into size_t */ 303#define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \ 304 { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); } 305/** put yesno into variable */ 306#define S_YNO(str, var) if(strcmp(opt, str) == 0) \ 307 { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); } 308/** put memsize into variable */ 309#define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \ 310 { return cfg_parse_memsize(val, &cfg->var); } 311/** put pow2 number into variable */ 312#define S_POW2(str, var) if(strcmp(opt, str)==0) \ 313 { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); } 314/** put string into variable */ 315#define S_STR(str, var) if(strcmp(opt, str)==0) \ 316 { free(cfg->var); return (cfg->var = strdup(val)) != NULL; } 317/** put string into strlist */ 318#define S_STRLIST(str, var) if(strcmp(opt, str)==0) \ 319 { return cfg_strlist_insert(&cfg->var, strdup(val)); } 320 321int config_set_option(struct config_file* cfg, const char* opt, 322 const char* val) 323{ 324 S_NUMBER_OR_ZERO("verbosity:", verbosity) 325 else if(strcmp(opt, "statistics-interval:") == 0) { 326 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0) 327 cfg->stat_interval = 0; 328 else if(atoi(val) == 0) 329 return 0; 330 else cfg->stat_interval = atoi(val); 331 } else if(strcmp(opt, "num_threads:") == 0) { 332 /* not supported, library must have 1 thread in bgworker */ 333 return 0; 334 } else if(strcmp(opt, "outgoing-port-permit:") == 0) { 335 return cfg_mark_ports(val, 1, 336 cfg->outgoing_avail_ports, 65536); 337 } else if(strcmp(opt, "outgoing-port-avoid:") == 0) { 338 return cfg_mark_ports(val, 0, 339 cfg->outgoing_avail_ports, 65536); 340 } else if(strcmp(opt, "local-zone:") == 0) { 341 return cfg_parse_local_zone(cfg, val); 342 } else if(strcmp(opt, "val-override-date:") == 0) { 343 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) { 344 cfg->val_date_override = 0; 345 } else if(strlen(val) == 14) { 346 cfg->val_date_override = cfg_convert_timeval(val); 347 return cfg->val_date_override != 0; 348 } else { 349 if(atoi(val) == 0) return 0; 350 cfg->val_date_override = (uint32_t)atoi(val); 351 } 352 } else if(strcmp(opt, "local-data-ptr:") == 0) { 353 char* ptr = cfg_ptr_reverse((char*)opt); 354 return cfg_strlist_insert(&cfg->local_data, ptr); 355 } else if(strcmp(opt, "logfile:") == 0) { 356 cfg->use_syslog = 0; 357 free(cfg->logfile); 358 return (cfg->logfile = strdup(val)) != NULL; 359 } 360 else if(strcmp(opt, "log-time-ascii:") == 0) 361 { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0); 362 log_set_time_asc(cfg->log_time_ascii); } 363 else S_SIZET_NONZERO("max-udp-size:", max_udp_size) 364 else S_YNO("use-syslog:", use_syslog) 365 else S_YNO("extended-statistics:", stat_extended) 366 else S_YNO("statistics-cumulative:", stat_cumulative) 367 else S_YNO("do-ip4:", do_ip4) 368 else S_YNO("do-ip6:", do_ip6) 369 else S_YNO("do-udp:", do_udp) 370 else S_YNO("do-tcp:", do_tcp) 371 else S_YNO("tcp-upstream:", tcp_upstream) 372 else S_YNO("ssl-upstream:", ssl_upstream) 373 else S_STR("ssl-service-key:", ssl_service_key) 374 else S_STR("ssl-service-pem:", ssl_service_pem) 375 else S_NUMBER_NONZERO("ssl-port:", ssl_port) 376 else S_YNO("interface-automatic:", if_automatic) 377 else S_YNO("do-daemonize:", do_daemonize) 378 else S_NUMBER_NONZERO("port:", port) 379 else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports) 380 else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp) 381 else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp) 382 else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size) 383 else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size) 384 else S_MEMSIZE("msg-cache-size:", msg_cache_size) 385 else S_POW2("msg-cache-slabs:", msg_cache_slabs) 386 else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread) 387 else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time) 388 else S_MEMSIZE("so-rcvbuf:", so_rcvbuf) 389 else S_MEMSIZE("so-sndbuf:", so_sndbuf) 390 else S_YNO("so-reuseport:", so_reuseport) 391 else S_YNO("ip-transparent:", ip_transparent) 392 else S_MEMSIZE("rrset-cache-size:", rrset_cache_size) 393 else S_POW2("rrset-cache-slabs:", rrset_cache_slabs) 394 else S_YNO("prefetch:", prefetch) 395 else S_YNO("prefetch-key:", prefetch_key) 396 else if(strcmp(opt, "cache-max-ttl:") == 0) 397 { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;} 398 else if(strcmp(opt, "cache-max-negative-ttl:") == 0) 399 { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;} 400 else if(strcmp(opt, "cache-min-ttl:") == 0) 401 { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;} 402 else if(strcmp(opt, "infra-cache-min-rtt:") == 0) { 403 IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val); 404 RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt; 405 } 406 else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl) 407 else S_POW2("infra-cache-slabs:", infra_cache_slabs) 408 else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts) 409 else S_NUMBER_OR_ZERO("delay-close:", delay_close) 410 else S_STR("chroot:", chrootdir) 411 else S_STR("username:", username) 412 else S_STR("directory:", directory) 413 else S_STR("pidfile:", pidfile) 414 else S_YNO("hide-identity:", hide_identity) 415 else S_YNO("hide-version:", hide_version) 416 else S_STR("identity:", identity) 417 else S_STR("version:", version) 418 else S_STRLIST("root-hints:", root_hints) 419 else S_STR("target-fetch-policy:", target_fetch_policy) 420 else S_YNO("harden-glue:", harden_glue) 421 else S_YNO("harden-short-bufsize:", harden_short_bufsize) 422 else S_YNO("harden-large-queries:", harden_large_queries) 423 else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped) 424 else S_YNO("harden-below-nxdomain:", harden_below_nxdomain) 425 else S_YNO("harden-referral-path:", harden_referral_path) 426 else S_YNO("harden-algo-downgrade:", harden_algo_downgrade) 427 else S_YNO("use-caps-for-id", use_caps_bits_for_id) 428 else S_STRLIST("caps-whitelist:", caps_whitelist) 429 else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold) 430 else S_STRLIST("private-address:", private_address) 431 else S_STRLIST("private-domain:", private_domain) 432 else S_YNO("do-not-query-localhost:", donotquery_localhost) 433 else S_STRLIST("do-not-query-address:", donotqueryaddrs) 434 else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list) 435 else S_STRLIST("trust-anchor-file:", trust_anchor_file_list) 436 else S_STRLIST("trust-anchor:", trust_anchor_list) 437 else S_STRLIST("trusted-keys-file:", trusted_keys_file_list) 438 else S_STR("dlv-anchor-file:", dlv_anchor_file) 439 else S_STRLIST("dlv-anchor:", dlv_anchor_list) 440 else S_STRLIST("domain-insecure:", domain_insecure) 441 else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl) 442 else S_YNO("val-clean-additional:", val_clean_additional) 443 else S_NUMBER_OR_ZERO("val-log-level:", val_log_level) 444 else S_YNO("val-log-squelch:", val_log_squelch) 445 else S_YNO("log-queries:", log_queries) 446 else S_YNO("val-permissive-mode:", val_permissive_mode) 447 else S_YNO("ignore-cd-flag:", ignore_cd) 448 else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations) 449 else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown) 450 else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown) 451 else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing) 452 else if(strcmp(opt, "permit-small-holddown:") == 0) 453 { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0); 454 autr_permit_small_holddown = cfg->permit_small_holddown; } 455 else S_MEMSIZE("key-cache-size:", key_cache_size) 456 else S_POW2("key-cache-slabs:", key_cache_slabs) 457 else S_MEMSIZE("neg-cache-size:", neg_cache_size) 458 else S_YNO("minimal-responses:", minimal_responses) 459 else S_YNO("rrset-roundrobin:", rrset_roundrobin) 460 else S_STRLIST("local-data:", local_data) 461 else S_YNO("unblock-lan-zones:", unblock_lan_zones) 462 else S_YNO("insecure-lan-zones:", insecure_lan_zones) 463 else S_YNO("control-enable:", remote_control_enable) 464 else S_STRLIST("control-interface:", control_ifs) 465 else S_NUMBER_NONZERO("control-port:", control_port) 466 else S_STR("server-key-file:", server_key_file) 467 else S_STR("server-cert-file:", server_cert_file) 468 else S_STR("control-key-file:", control_key_file) 469 else S_STR("control-cert-file:", control_cert_file) 470 else S_STR("module-config:", module_conf) 471 else S_STR("python-script:", python_script) 472 else if(strcmp(opt, "ratelimit:") == 0) { 473 IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val); 474 infra_dp_ratelimit=cfg->ratelimit; 475 } 476 else S_MEMSIZE("ratelimit-size:", ratelimit_size) 477 else S_POW2("ratelimit-slabs:", ratelimit_slabs) 478 else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor) 479 else S_YNO("qname-minimisation:", qname_minimisation) 480 /* val_sig_skew_min and max are copied into val_env during init, 481 * so this does not update val_env with set_option */ 482 else if(strcmp(opt, "val-sig-skew-min:") == 0) 483 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); } 484 else if(strcmp(opt, "val-sig-skew-max:") == 0) 485 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); } 486 else if (strcmp(opt, "outgoing-interface:") == 0) { 487 char* d = strdup(val); 488 char** oi = 489 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*)); 490 if(!d || !oi) { free(d); free(oi); return -1; } 491 if(cfg->out_ifs && cfg->num_out_ifs) { 492 memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*)); 493 free(cfg->out_ifs); 494 } 495 oi[cfg->num_out_ifs++] = d; 496 cfg->out_ifs = oi; 497 } else { 498 /* unknown or unsupported (from the set_option interface): 499 * interface, outgoing-interface, access-control, 500 * stub-zone, name, stub-addr, stub-host, stub-prime 501 * forward-first, stub-first, 502 * forward-zone, name, forward-addr, forward-host, 503 * ratelimit-for-domain, ratelimit-below-domain */ 504 return 0; 505 } 506 return 1; 507} 508 509void config_print_func(char* line, void* arg) 510{ 511 FILE* f = (FILE*)arg; 512 (void)fprintf(f, "%s\n", line); 513} 514 515/** collate func arg */ 516struct config_collate_arg { 517 /** list of result items */ 518 struct config_strlist_head list; 519 /** if a malloc error occurred, 0 is OK */ 520 int status; 521}; 522 523void config_collate_func(char* line, void* arg) 524{ 525 struct config_collate_arg* m = (struct config_collate_arg*)arg; 526 if(m->status) 527 return; 528 if(!cfg_strlist_append(&m->list, strdup(line))) 529 m->status = 1; 530} 531 532int config_get_option_list(struct config_file* cfg, const char* opt, 533 struct config_strlist** list) 534{ 535 struct config_collate_arg m; 536 memset(&m, 0, sizeof(m)); 537 *list = NULL; 538 if(!config_get_option(cfg, opt, config_collate_func, &m)) 539 return 1; 540 if(m.status) { 541 config_delstrlist(m.list.first); 542 return 2; 543 } 544 *list = m.list.first; 545 return 0; 546} 547 548int 549config_get_option_collate(struct config_file* cfg, const char* opt, char** str) 550{ 551 struct config_strlist* list = NULL; 552 int r; 553 *str = NULL; 554 if((r = config_get_option_list(cfg, opt, &list)) != 0) 555 return r; 556 *str = config_collate_cat(list); 557 config_delstrlist(list); 558 if(!*str) return 2; 559 return 0; 560} 561 562char* 563config_collate_cat(struct config_strlist* list) 564{ 565 size_t total = 0, left; 566 struct config_strlist* s; 567 char *r, *w; 568 if(!list) /* no elements */ 569 return strdup(""); 570 if(list->next == NULL) /* one element , no newline at end. */ 571 return strdup(list->str); 572 /* count total length */ 573 for(s=list; s; s=s->next) 574 total += strlen(s->str) + 1; /* len + newline */ 575 left = total+1; /* one extra for nul at end */ 576 r = malloc(left); 577 if(!r) 578 return NULL; 579 w = r; 580 for(s=list; s; s=s->next) { 581 size_t this = strlen(s->str); 582 if(this+2 > left) { /* sanity check */ 583 free(r); 584 return NULL; 585 } 586 snprintf(w, left, "%s\n", s->str); 587 this = strlen(w); 588 w += this; 589 left -= this; 590 } 591 return r; 592} 593 594/** compare and print decimal option */ 595#define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \ 596 {snprintf(buf, len, "%d", (int)cfg->var); \ 597 func(buf, arg);} 598/** compare and print unsigned option */ 599#define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \ 600 {snprintf(buf, len, "%u", (unsigned)cfg->var); \ 601 func(buf, arg);} 602/** compare and print yesno option */ 603#define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \ 604 {func(cfg->var?"yes":"no", arg);} 605/** compare and print string option */ 606#define O_STR(opt, str, var) if(strcmp(opt, str)==0) \ 607 {func(cfg->var?cfg->var:"", arg);} 608/** compare and print array option */ 609#define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \ 610 {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);} 611/** compare and print memorysize option */ 612#define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \ 613 if(cfg->var > 1024*1024*1024) { \ 614 size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \ 615 snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \ 616 } else snprintf(buf, len, "%u", (unsigned)cfg->var); \ 617 func(buf, arg);} 618/** compare and print list option */ 619#define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \ 620 struct config_strlist* p = cfg->lst; \ 621 for(p = cfg->lst; p; p = p->next) \ 622 func(p->str, arg); \ 623 } 624/** compare and print list option */ 625#define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \ 626 struct config_str2list* p = cfg->lst; \ 627 for(p = cfg->lst; p; p = p->next) \ 628 snprintf(buf, len, "%s %s\n", p->str, p->str2); \ 629 func(buf, arg); \ 630 } 631 632int 633config_get_option(struct config_file* cfg, const char* opt, 634 void (*func)(char*,void*), void* arg) 635{ 636 char buf[1024]; 637 size_t len = sizeof(buf); 638 fptr_ok(fptr_whitelist_print_func(func)); 639 O_DEC(opt, "verbosity", verbosity) 640 else O_DEC(opt, "statistics-interval", stat_interval) 641 else O_YNO(opt, "statistics-cumulative", stat_cumulative) 642 else O_YNO(opt, "extended-statistics", stat_extended) 643 else O_YNO(opt, "use-syslog", use_syslog) 644 else O_YNO(opt, "log-time-ascii", log_time_ascii) 645 else O_DEC(opt, "num-threads", num_threads) 646 else O_IFC(opt, "interface", num_ifs, ifs) 647 else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs) 648 else O_YNO(opt, "interface-automatic", if_automatic) 649 else O_DEC(opt, "port", port) 650 else O_DEC(opt, "outgoing-range", outgoing_num_ports) 651 else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp) 652 else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp) 653 else O_DEC(opt, "edns-buffer-size", edns_buffer_size) 654 else O_DEC(opt, "msg-buffer-size", msg_buffer_size) 655 else O_MEM(opt, "msg-cache-size", msg_cache_size) 656 else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs) 657 else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread) 658 else O_UNS(opt, "jostle-timeout", jostle_time) 659 else O_MEM(opt, "so-rcvbuf", so_rcvbuf) 660 else O_MEM(opt, "so-sndbuf", so_sndbuf) 661 else O_YNO(opt, "so-reuseport", so_reuseport) 662 else O_YNO(opt, "ip-transparent", ip_transparent) 663 else O_MEM(opt, "rrset-cache-size", rrset_cache_size) 664 else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs) 665 else O_YNO(opt, "prefetch-key", prefetch_key) 666 else O_YNO(opt, "prefetch", prefetch) 667 else O_DEC(opt, "cache-max-ttl", max_ttl) 668 else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl) 669 else O_DEC(opt, "cache-min-ttl", min_ttl) 670 else O_DEC(opt, "infra-host-ttl", host_ttl) 671 else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs) 672 else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt) 673 else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts) 674 else O_UNS(opt, "delay-close", delay_close) 675 else O_YNO(opt, "do-ip4", do_ip4) 676 else O_YNO(opt, "do-ip6", do_ip6) 677 else O_YNO(opt, "do-udp", do_udp) 678 else O_YNO(opt, "do-tcp", do_tcp) 679 else O_YNO(opt, "tcp-upstream", tcp_upstream) 680 else O_YNO(opt, "ssl-upstream", ssl_upstream) 681 else O_STR(opt, "ssl-service-key", ssl_service_key) 682 else O_STR(opt, "ssl-service-pem", ssl_service_pem) 683 else O_DEC(opt, "ssl-port", ssl_port) 684 else O_YNO(opt, "do-daemonize", do_daemonize) 685 else O_STR(opt, "chroot", chrootdir) 686 else O_STR(opt, "username", username) 687 else O_STR(opt, "directory", directory) 688 else O_STR(opt, "logfile", logfile) 689 else O_YNO(opt, "log-queries", log_queries) 690 else O_STR(opt, "pidfile", pidfile) 691 else O_YNO(opt, "hide-identity", hide_identity) 692 else O_YNO(opt, "hide-version", hide_version) 693 else O_STR(opt, "identity", identity) 694 else O_STR(opt, "version", version) 695 else O_STR(opt, "target-fetch-policy", target_fetch_policy) 696 else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize) 697 else O_YNO(opt, "harden-large-queries", harden_large_queries) 698 else O_YNO(opt, "harden-glue", harden_glue) 699 else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped) 700 else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain) 701 else O_YNO(opt, "harden-referral-path", harden_referral_path) 702 else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade) 703 else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id) 704 else O_LST(opt, "caps-whitelist", caps_whitelist) 705 else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold) 706 else O_YNO(opt, "do-not-query-localhost", donotquery_localhost) 707 else O_STR(opt, "module-config", module_conf) 708 else O_STR(opt, "dlv-anchor-file", dlv_anchor_file) 709 else O_DEC(opt, "val-bogus-ttl", bogus_ttl) 710 else O_YNO(opt, "val-clean-additional", val_clean_additional) 711 else O_DEC(opt, "val-log-level", val_log_level) 712 else O_YNO(opt, "val-permissive-mode", val_permissive_mode) 713 else O_YNO(opt, "ignore-cd-flag", ignore_cd) 714 else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations) 715 else O_UNS(opt, "add-holddown", add_holddown) 716 else O_UNS(opt, "del-holddown", del_holddown) 717 else O_UNS(opt, "keep-missing", keep_missing) 718 else O_YNO(opt, "permit-small-holddown", permit_small_holddown) 719 else O_MEM(opt, "key-cache-size", key_cache_size) 720 else O_DEC(opt, "key-cache-slabs", key_cache_slabs) 721 else O_MEM(opt, "neg-cache-size", neg_cache_size) 722 else O_YNO(opt, "control-enable", remote_control_enable) 723 else O_DEC(opt, "control-port", control_port) 724 else O_STR(opt, "server-key-file", server_key_file) 725 else O_STR(opt, "server-cert-file", server_cert_file) 726 else O_STR(opt, "control-key-file", control_key_file) 727 else O_STR(opt, "control-cert-file", control_cert_file) 728 else O_LST(opt, "root-hints", root_hints) 729 else O_LS2(opt, "access-control", acls) 730 else O_LST(opt, "do-not-query-address", donotqueryaddrs) 731 else O_LST(opt, "private-address", private_address) 732 else O_LST(opt, "private-domain", private_domain) 733 else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list) 734 else O_LST(opt, "trust-anchor-file", trust_anchor_file_list) 735 else O_LST(opt, "trust-anchor", trust_anchor_list) 736 else O_LST(opt, "trusted-keys-file", trusted_keys_file_list) 737 else O_LST(opt, "dlv-anchor", dlv_anchor_list) 738 else O_LST(opt, "control-interface", control_ifs) 739 else O_LST(opt, "domain-insecure", domain_insecure) 740 else O_UNS(opt, "val-override-date", val_date_override) 741 else O_YNO(opt, "minimal-responses", minimal_responses) 742 else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin) 743 else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones) 744 else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones) 745 else O_DEC(opt, "max-udp-size", max_udp_size) 746 else O_STR(opt, "python-script", python_script) 747 else O_DEC(opt, "ratelimit", ratelimit) 748 else O_MEM(opt, "ratelimit-size", ratelimit_size) 749 else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs) 750 else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain) 751 else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain) 752 else O_DEC(opt, "ratelimit-factor", ratelimit_factor) 753 else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min) 754 else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max) 755 else O_YNO(opt, "qname-minimisation", qname_minimisation) 756 /* not here: 757 * outgoing-permit, outgoing-avoid - have list of ports 758 * local-zone - zones and nodefault variables 759 * local-data - see below 760 * local-data-ptr - converted to local-data entries 761 * stub-zone, name, stub-addr, stub-host, stub-prime 762 * forward-zone, name, forward-addr, forward-host 763 */ 764 else return 0; 765 return 1; 766} 767 768/** initialize the global cfg_parser object */ 769static void 770create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot) 771{ 772 static struct config_parser_state st; 773 cfg_parser = &st; 774 cfg_parser->filename = filename; 775 cfg_parser->line = 1; 776 cfg_parser->errors = 0; 777 cfg_parser->cfg = cfg; 778 cfg_parser->chroot = chroot; 779 init_cfg_parse(); 780} 781 782int 783config_read(struct config_file* cfg, const char* filename, const char* chroot) 784{ 785 FILE *in; 786 char *fname = (char*)filename; 787#ifdef HAVE_GLOB 788 glob_t g; 789 size_t i; 790 int r, flags; 791#endif 792 if(!fname) 793 return 1; 794 795 /* check for wildcards */ 796#ifdef HAVE_GLOB 797 if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') && 798 !strchr(fname, '{') && !strchr(fname, '~'))) { 799 verbose(VERB_QUERY, "wildcard found, processing %s", fname); 800 flags = 0 801#ifdef GLOB_ERR 802 | GLOB_ERR 803#endif 804#ifdef GLOB_NOSORT 805 | GLOB_NOSORT 806#endif 807#ifdef GLOB_BRACE 808 | GLOB_BRACE 809#endif 810#ifdef GLOB_TILDE 811 | GLOB_TILDE 812#endif 813 ; 814 memset(&g, 0, sizeof(g)); 815 r = glob(fname, flags, NULL, &g); 816 if(r) { 817 /* some error */ 818 globfree(&g); 819 if(r == GLOB_NOMATCH) { 820 verbose(VERB_QUERY, "include: " 821 "no matches for %s", fname); 822 return 1; 823 } else if(r == GLOB_NOSPACE) { 824 log_err("include: %s: " 825 "fnametern out of memory", fname); 826 } else if(r == GLOB_ABORTED) { 827 log_err("wildcard include: %s: expansion " 828 "aborted (%s)", fname, strerror(errno)); 829 } else { 830 log_err("wildcard include: %s: expansion " 831 "failed (%s)", fname, strerror(errno)); 832 } 833 /* ignore globs that yield no files */ 834 return 1; 835 } 836 /* process files found, if any */ 837 for(i=0; i<(size_t)g.gl_pathc; i++) { 838 if(!config_read(cfg, g.gl_pathv[i], chroot)) { 839 log_err("error reading wildcard " 840 "include: %s", g.gl_pathv[i]); 841 globfree(&g); 842 return 0; 843 } 844 } 845 globfree(&g); 846 return 1; 847 } 848#endif /* HAVE_GLOB */ 849 850 in = fopen(fname, "r"); 851 if(!in) { 852 log_err("Could not open %s: %s", fname, strerror(errno)); 853 return 0; 854 } 855 create_cfg_parser(cfg, fname, chroot); 856 ub_c_in = in; 857 ub_c_parse(); 858 fclose(in); 859 860 if(cfg_parser->errors != 0) { 861 fprintf(stderr, "read %s failed: %d errors in configuration file\n", 862 fname, cfg_parser->errors); 863 errno=EINVAL; 864 return 0; 865 } 866 867 return 1; 868} 869 870void 871config_delstrlist(struct config_strlist* p) 872{ 873 struct config_strlist *np; 874 while(p) { 875 np = p->next; 876 free(p->str); 877 free(p); 878 p = np; 879 } 880} 881 882void 883config_deldblstrlist(struct config_str2list* p) 884{ 885 struct config_str2list *np; 886 while(p) { 887 np = p->next; 888 free(p->str); 889 free(p->str2); 890 free(p); 891 p = np; 892 } 893} 894 895void 896config_delstubs(struct config_stub* p) 897{ 898 struct config_stub* np; 899 while(p) { 900 np = p->next; 901 free(p->name); 902 config_delstrlist(p->hosts); 903 config_delstrlist(p->addrs); 904 free(p); 905 p = np; 906 } 907} 908 909void 910config_delete(struct config_file* cfg) 911{ 912 if(!cfg) return; 913 free(cfg->username); 914 free(cfg->chrootdir); 915 free(cfg->directory); 916 free(cfg->logfile); 917 free(cfg->pidfile); 918 free(cfg->target_fetch_policy); 919 free(cfg->ssl_service_key); 920 free(cfg->ssl_service_pem); 921 if(cfg->ifs) { 922 int i; 923 for(i=0; i<cfg->num_ifs; i++) 924 free(cfg->ifs[i]); 925 free(cfg->ifs); 926 } 927 if(cfg->out_ifs) { 928 int i; 929 for(i=0; i<cfg->num_out_ifs; i++) 930 free(cfg->out_ifs[i]); 931 free(cfg->out_ifs); 932 } 933 config_delstubs(cfg->stubs); 934 config_delstubs(cfg->forwards); 935 config_delstrlist(cfg->donotqueryaddrs); 936 config_delstrlist(cfg->root_hints); 937 free(cfg->identity); 938 free(cfg->version); 939 free(cfg->module_conf); 940 free(cfg->outgoing_avail_ports); 941 config_delstrlist(cfg->caps_whitelist); 942 config_delstrlist(cfg->private_address); 943 config_delstrlist(cfg->private_domain); 944 config_delstrlist(cfg->auto_trust_anchor_file_list); 945 config_delstrlist(cfg->trust_anchor_file_list); 946 config_delstrlist(cfg->trusted_keys_file_list); 947 config_delstrlist(cfg->trust_anchor_list); 948 config_delstrlist(cfg->domain_insecure); 949 free(cfg->dlv_anchor_file); 950 config_delstrlist(cfg->dlv_anchor_list); 951 config_deldblstrlist(cfg->acls); 952 free(cfg->val_nsec3_key_iterations); 953 config_deldblstrlist(cfg->local_zones); 954 config_delstrlist(cfg->local_zones_nodefault); 955 config_delstrlist(cfg->local_data); 956 config_delstrlist(cfg->control_ifs); 957 free(cfg->server_key_file); 958 free(cfg->server_cert_file); 959 free(cfg->control_key_file); 960 free(cfg->control_cert_file); 961 free(cfg->dns64_prefix); 962 free(cfg->dnstap_socket_path); 963 free(cfg->dnstap_identity); 964 free(cfg->dnstap_version); 965 config_deldblstrlist(cfg->ratelimit_for_domain); 966 config_deldblstrlist(cfg->ratelimit_below_domain); 967 free(cfg); 968} 969 970static void 971init_outgoing_availports(int* a, int num) 972{ 973 /* generated with make iana_update */ 974 const int iana_assigned[] = { 975#include "util/iana_ports.inc" 976 -1 }; /* end marker to put behind trailing comma */ 977 978 int i; 979 /* do not use <1024, that could be trouble with the system, privs */ 980 for(i=1024; i<num; i++) { 981 a[i] = i; 982 } 983 /* create empty spot at 49152 to keep ephemeral ports available 984 * to other programs */ 985 for(i=49152; i<49152+256; i++) 986 a[i] = 0; 987 /* pick out all the IANA assigned ports */ 988 for(i=0; iana_assigned[i]!=-1; i++) { 989 if(iana_assigned[i] < num) 990 a[iana_assigned[i]] = 0; 991 } 992} 993 994int 995cfg_mark_ports(const char* str, int allow, int* avail, int num) 996{ 997 char* mid = strchr(str, '-'); 998 if(!mid) { 999 int port = atoi(str); 1000 if(port == 0 && strcmp(str, "0") != 0) { 1001 log_err("cannot parse port number '%s'", str); 1002 return 0; 1003 } 1004 if(port < num) 1005 avail[port] = (allow?port:0); 1006 } else { 1007 int i, low, high = atoi(mid+1); 1008 char buf[16]; 1009 if(high == 0 && strcmp(mid+1, "0") != 0) { 1010 log_err("cannot parse port number '%s'", mid+1); 1011 return 0; 1012 } 1013 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) { 1014 log_err("cannot parse port number '%s'", str); 1015 return 0; 1016 } 1017 if(mid > str) 1018 memcpy(buf, str, (size_t)(mid-str)); 1019 buf[mid-str] = 0; 1020 low = atoi(buf); 1021 if(low == 0 && strcmp(buf, "0") != 0) { 1022 log_err("cannot parse port number '%s'", buf); 1023 return 0; 1024 } 1025 for(i=low; i<=high; i++) { 1026 if(i < num) 1027 avail[i] = (allow?i:0); 1028 } 1029 return 1; 1030 } 1031 return 1; 1032} 1033 1034int 1035cfg_scan_ports(int* avail, int num) 1036{ 1037 int i; 1038 int count = 0; 1039 for(i=0; i<num; i++) { 1040 if(avail[i]) 1041 count++; 1042 } 1043 return count; 1044} 1045 1046int cfg_condense_ports(struct config_file* cfg, int** avail) 1047{ 1048 int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536); 1049 int i, at = 0; 1050 *avail = NULL; 1051 if(num == 0) 1052 return 0; 1053 *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int)); 1054 if(!*avail) 1055 return 0; 1056 for(i=0; i<65536; i++) { 1057 if(cfg->outgoing_avail_ports[i]) 1058 (*avail)[at++] = cfg->outgoing_avail_ports[i]; 1059 } 1060 log_assert(at == num); 1061 return num; 1062} 1063 1064/** print error with file and line number */ 1065static void ub_c_error_va_list(const char *fmt, va_list args) 1066{ 1067 cfg_parser->errors++; 1068 fprintf(stderr, "%s:%d: error: ", cfg_parser->filename, 1069 cfg_parser->line); 1070 vfprintf(stderr, fmt, args); 1071 fprintf(stderr, "\n"); 1072} 1073 1074/** print error with file and line number */ 1075void ub_c_error_msg(const char* fmt, ...) 1076{ 1077 va_list args; 1078 va_start(args, fmt); 1079 ub_c_error_va_list(fmt, args); 1080 va_end(args); 1081} 1082 1083void ub_c_error(const char *str) 1084{ 1085 cfg_parser->errors++; 1086 fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename, 1087 cfg_parser->line, str); 1088} 1089 1090int ub_c_wrap(void) 1091{ 1092 return 1; 1093} 1094 1095int cfg_strlist_append(struct config_strlist_head* list, char* item) 1096{ 1097 struct config_strlist *s; 1098 if(!item || !list) 1099 return 0; 1100 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 1101 if(!s) 1102 return 0; 1103 s->str = item; 1104 s->next = NULL; 1105 if(list->last) 1106 list->last->next = s; 1107 else 1108 list->first = s; 1109 list->last = s; 1110 return 1; 1111} 1112 1113int 1114cfg_strlist_insert(struct config_strlist** head, char* item) 1115{ 1116 struct config_strlist *s; 1117 if(!item || !head) 1118 return 0; 1119 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 1120 if(!s) 1121 return 0; 1122 s->str = item; 1123 s->next = *head; 1124 *head = s; 1125 return 1; 1126} 1127 1128int 1129cfg_str2list_insert(struct config_str2list** head, char* item, char* i2) 1130{ 1131 struct config_str2list *s; 1132 if(!item || !i2 || !head) 1133 return 0; 1134 s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list)); 1135 if(!s) 1136 return 0; 1137 s->str = item; 1138 s->str2 = i2; 1139 s->next = *head; 1140 *head = s; 1141 return 1; 1142} 1143 1144time_t 1145cfg_convert_timeval(const char* str) 1146{ 1147 time_t t; 1148 struct tm tm; 1149 memset(&tm, 0, sizeof(tm)); 1150 if(strlen(str) < 14) 1151 return 0; 1152 if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon, 1153 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) 1154 return 0; 1155 tm.tm_year -= 1900; 1156 tm.tm_mon--; 1157 /* Check values */ 1158 if (tm.tm_year < 70) return 0; 1159 if (tm.tm_mon < 0 || tm.tm_mon > 11) return 0; 1160 if (tm.tm_mday < 1 || tm.tm_mday > 31) return 0; 1161 if (tm.tm_hour < 0 || tm.tm_hour > 23) return 0; 1162 if (tm.tm_min < 0 || tm.tm_min > 59) return 0; 1163 if (tm.tm_sec < 0 || tm.tm_sec > 59) return 0; 1164 /* call ldns conversion function */ 1165 t = sldns_mktime_from_utc(&tm); 1166 return t; 1167} 1168 1169int 1170cfg_count_numbers(const char* s) 1171{ 1172 /* format ::= (sp num)+ sp */ 1173 /* num ::= [-](0-9)+ */ 1174 /* sp ::= (space|tab)* */ 1175 int num = 0; 1176 while(*s) { 1177 while(*s && isspace((unsigned char)*s)) 1178 s++; 1179 if(!*s) /* end of string */ 1180 break; 1181 if(*s == '-') 1182 s++; 1183 if(!*s) /* only - not allowed */ 1184 return 0; 1185 if(!isdigit((unsigned char)*s)) /* bad character */ 1186 return 0; 1187 while(*s && isdigit((unsigned char)*s)) 1188 s++; 1189 num++; 1190 } 1191 return num; 1192} 1193 1194/** all digit number */ 1195static int isalldigit(const char* str, size_t l) 1196{ 1197 size_t i; 1198 for(i=0; i<l; i++) 1199 if(!isdigit((unsigned char)str[i])) 1200 return 0; 1201 return 1; 1202} 1203 1204int 1205cfg_parse_memsize(const char* str, size_t* res) 1206{ 1207 size_t len; 1208 size_t mult = 1; 1209 if(!str || (len=(size_t)strlen(str)) == 0) { 1210 log_err("not a size: '%s'", str); 1211 return 0; 1212 } 1213 if(isalldigit(str, len)) { 1214 *res = (size_t)atol(str); 1215 return 1; 1216 } 1217 /* check appended num */ 1218 while(len>0 && str[len-1]==' ') 1219 len--; 1220 if(len > 1 && str[len-1] == 'b') 1221 len--; 1222 else if(len > 1 && str[len-1] == 'B') 1223 len--; 1224 1225 if(len > 1 && tolower((unsigned char)str[len-1]) == 'g') 1226 mult = 1024*1024*1024; 1227 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm') 1228 mult = 1024*1024; 1229 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k') 1230 mult = 1024; 1231 else if(len > 0 && isdigit((unsigned char)str[len-1])) 1232 mult = 1; 1233 else { 1234 log_err("unknown size specifier: '%s'", str); 1235 return 0; 1236 } 1237 while(len>1 && str[len-2]==' ') 1238 len--; 1239 1240 if(!isalldigit(str, len-1)) { 1241 log_err("unknown size specifier: '%s'", str); 1242 return 0; 1243 } 1244 *res = ((size_t)atol(str)) * mult; 1245 return 1; 1246} 1247 1248void 1249config_apply(struct config_file* config) 1250{ 1251 MAX_TTL = (time_t)config->max_ttl; 1252 MIN_TTL = (time_t)config->min_ttl; 1253 MAX_NEG_TTL = (time_t)config->max_negative_ttl; 1254 RTT_MIN_TIMEOUT = config->infra_cache_min_rtt; 1255 EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size; 1256 MINIMAL_RESPONSES = config->minimal_responses; 1257 RRSET_ROUNDROBIN = config->rrset_roundrobin; 1258 log_set_time_asc(config->log_time_ascii); 1259 autr_permit_small_holddown = config->permit_small_holddown; 1260} 1261 1262void config_lookup_uid(struct config_file* cfg) 1263{ 1264#ifdef HAVE_GETPWNAM 1265 /* translate username into uid and gid */ 1266 if(cfg->username && cfg->username[0]) { 1267 struct passwd *pwd; 1268 if((pwd = getpwnam(cfg->username)) != NULL) { 1269 cfg_uid = pwd->pw_uid; 1270 cfg_gid = pwd->pw_gid; 1271 } 1272 } 1273#else 1274 (void)cfg; 1275#endif 1276} 1277 1278/** 1279 * Calculate string length of full pathname in original filesys 1280 * @param fname: the path name to convert. 1281 * Must not be null or empty. 1282 * @param cfg: config struct for chroot and chdir (if set). 1283 * @param use_chdir: if false, only chroot is applied. 1284 * @return length of string. 1285 * remember to allocate one more for 0 at end in mallocs. 1286 */ 1287static size_t 1288strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) 1289{ 1290 size_t len = 0; 1291 int slashit = 0; 1292 if(cfg->chrootdir && cfg->chrootdir[0] && 1293 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { 1294 /* already full pathname, return it */ 1295 return strlen(fname); 1296 } 1297 /* chroot */ 1298 if(cfg->chrootdir && cfg->chrootdir[0]) { 1299 /* start with chrootdir */ 1300 len += strlen(cfg->chrootdir); 1301 slashit = 1; 1302 } 1303 /* chdir */ 1304#ifdef UB_ON_WINDOWS 1305 if(fname[0] != 0 && fname[1] == ':') { 1306 /* full path, no chdir */ 1307 } else 1308#endif 1309 if(fname[0] == '/' || !use_chdir) { 1310 /* full path, no chdir */ 1311 } else if(cfg->directory && cfg->directory[0]) { 1312 /* prepend chdir */ 1313 if(slashit && cfg->directory[0] != '/') 1314 len++; 1315 if(cfg->chrootdir && cfg->chrootdir[0] && 1316 strncmp(cfg->chrootdir, cfg->directory, 1317 strlen(cfg->chrootdir)) == 0) 1318 len += strlen(cfg->directory)-strlen(cfg->chrootdir); 1319 else len += strlen(cfg->directory); 1320 slashit = 1; 1321 } 1322 /* fname */ 1323 if(slashit && fname[0] != '/') 1324 len++; 1325 len += strlen(fname); 1326 return len; 1327} 1328 1329char* 1330fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) 1331{ 1332 size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1; 1333 int slashit = 0; 1334 char* buf = (char*)malloc(len); 1335 if(!buf) 1336 return NULL; 1337 buf[0] = 0; 1338 /* is fname already in chroot ? */ 1339 if(cfg->chrootdir && cfg->chrootdir[0] && 1340 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { 1341 /* already full pathname, return it */ 1342 (void)strlcpy(buf, fname, len); 1343 buf[len-1] = 0; 1344 return buf; 1345 } 1346 /* chroot */ 1347 if(cfg->chrootdir && cfg->chrootdir[0]) { 1348 /* start with chrootdir */ 1349 (void)strlcpy(buf, cfg->chrootdir, len); 1350 slashit = 1; 1351 } 1352#ifdef UB_ON_WINDOWS 1353 if(fname[0] != 0 && fname[1] == ':') { 1354 /* full path, no chdir */ 1355 } else 1356#endif 1357 /* chdir */ 1358 if(fname[0] == '/' || !use_chdir) { 1359 /* full path, no chdir */ 1360 } else if(cfg->directory && cfg->directory[0]) { 1361 /* prepend chdir */ 1362 if(slashit && cfg->directory[0] != '/') 1363 (void)strlcat(buf, "/", len); 1364 /* is the directory already in the chroot? */ 1365 if(cfg->chrootdir && cfg->chrootdir[0] && 1366 strncmp(cfg->chrootdir, cfg->directory, 1367 strlen(cfg->chrootdir)) == 0) 1368 (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir), 1369 len); 1370 else (void)strlcat(buf, cfg->directory, len); 1371 slashit = 1; 1372 } 1373 /* fname */ 1374 if(slashit && fname[0] != '/') 1375 (void)strlcat(buf, "/", len); 1376 (void)strlcat(buf, fname, len); 1377 buf[len-1] = 0; 1378 return buf; 1379} 1380 1381/** return next space character in string */ 1382static char* next_space_pos(const char* str) 1383{ 1384 char* sp = strchr(str, ' '); 1385 char* tab = strchr(str, '\t'); 1386 if(!tab && !sp) 1387 return NULL; 1388 if(!sp) return tab; 1389 if(!tab) return sp; 1390 return (sp<tab)?sp:tab; 1391} 1392 1393/** return last space character in string */ 1394static char* last_space_pos(const char* str) 1395{ 1396 char* sp = strrchr(str, ' '); 1397 char* tab = strrchr(str, '\t'); 1398 if(!tab && !sp) 1399 return NULL; 1400 if(!sp) return tab; 1401 if(!tab) return sp; 1402 return (sp>tab)?sp:tab; 1403} 1404 1405int 1406cfg_parse_local_zone(struct config_file* cfg, const char* val) 1407{ 1408 const char *type, *name_end, *name; 1409 char buf[256]; 1410 1411 /* parse it as: [zone_name] [between stuff] [zone_type] */ 1412 name = val; 1413 while(*name && isspace((unsigned char)*name)) 1414 name++; 1415 if(!*name) { 1416 log_err("syntax error: too short: %s", val); 1417 return 0; 1418 } 1419 name_end = next_space_pos(name); 1420 if(!name_end || !*name_end) { 1421 log_err("syntax error: expected zone type: %s", val); 1422 return 0; 1423 } 1424 if (name_end - name > 255) { 1425 log_err("syntax error: bad zone name: %s", val); 1426 return 0; 1427 } 1428 (void)strlcpy(buf, name, sizeof(buf)); 1429 buf[name_end-name] = '\0'; 1430 1431 type = last_space_pos(name_end); 1432 while(type && *type && isspace((unsigned char)*type)) 1433 type++; 1434 if(!type || !*type) { 1435 log_err("syntax error: expected zone type: %s", val); 1436 return 0; 1437 } 1438 1439 if(strcmp(type, "nodefault")==0) { 1440 return cfg_strlist_insert(&cfg->local_zones_nodefault, 1441 strdup(name)); 1442 } else { 1443 return cfg_str2list_insert(&cfg->local_zones, strdup(buf), 1444 strdup(type)); 1445 } 1446} 1447 1448char* cfg_ptr_reverse(char* str) 1449{ 1450 char* ip, *ip_end; 1451 char* name; 1452 char* result; 1453 char buf[1024]; 1454 struct sockaddr_storage addr; 1455 socklen_t addrlen; 1456 1457 /* parse it as: [IP] [between stuff] [name] */ 1458 ip = str; 1459 while(*ip && isspace((unsigned char)*ip)) 1460 ip++; 1461 if(!*ip) { 1462 log_err("syntax error: too short: %s", str); 1463 return NULL; 1464 } 1465 ip_end = next_space_pos(ip); 1466 if(!ip_end || !*ip_end) { 1467 log_err("syntax error: expected name: %s", str); 1468 return NULL; 1469 } 1470 1471 name = last_space_pos(ip_end); 1472 if(!name || !*name) { 1473 log_err("syntax error: expected name: %s", str); 1474 return NULL; 1475 } 1476 1477 sscanf(ip, "%100s", buf); 1478 buf[sizeof(buf)-1]=0; 1479 1480 if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) { 1481 log_err("syntax error: cannot parse address: %s", str); 1482 return NULL; 1483 } 1484 1485 /* reverse IPv4: 1486 * ddd.ddd.ddd.ddd.in-addr-arpa. 1487 * IPv6: (h.){32}.ip6.arpa. */ 1488 1489 if(addr_is_ip6(&addr, addrlen)) { 1490 uint8_t ad[16]; 1491 const char* hex = "0123456789abcdef"; 1492 char *p = buf; 1493 int i; 1494 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr, 1495 sizeof(ad)); 1496 for(i=15; i>=0; i--) { 1497 uint8_t b = ad[i]; 1498 *p++ = hex[ (b&0x0f) ]; 1499 *p++ = '.'; 1500 *p++ = hex[ (b&0xf0) >> 4 ]; 1501 *p++ = '.'; 1502 } 1503 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. "); 1504 } else { 1505 uint8_t ad[4]; 1506 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr, 1507 sizeof(ad)); 1508 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ", 1509 (unsigned)ad[3], (unsigned)ad[2], 1510 (unsigned)ad[1], (unsigned)ad[0]); 1511 } 1512 1513 /* printed the reverse address, now the between goop and name on end */ 1514 while(*ip_end && isspace((unsigned char)*ip_end)) 1515 ip_end++; 1516 if(name>ip_end) { 1517 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s", 1518 (int)(name-ip_end), ip_end); 1519 } 1520 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name); 1521 1522 result = strdup(buf); 1523 if(!result) { 1524 log_err("out of memory parsing %s", str); 1525 return NULL; 1526 } 1527 return result; 1528} 1529 1530#ifdef UB_ON_WINDOWS 1531char* 1532w_lookup_reg_str(const char* key, const char* name) 1533{ 1534 HKEY hk = NULL; 1535 DWORD type = 0; 1536 BYTE buf[1024]; 1537 DWORD len = (DWORD)sizeof(buf); 1538 LONG ret; 1539 char* result = NULL; 1540 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk); 1541 if(ret == ERROR_FILE_NOT_FOUND) 1542 return NULL; /* key does not exist */ 1543 else if(ret != ERROR_SUCCESS) { 1544 log_err("RegOpenKeyEx failed"); 1545 return NULL; 1546 } 1547 ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len); 1548 if(RegCloseKey(hk)) 1549 log_err("RegCloseKey"); 1550 if(ret == ERROR_FILE_NOT_FOUND) 1551 return NULL; /* name does not exist */ 1552 else if(ret != ERROR_SUCCESS) { 1553 log_err("RegQueryValueEx failed"); 1554 return NULL; 1555 } 1556 if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) { 1557 buf[sizeof(buf)-1] = 0; 1558 buf[sizeof(buf)-2] = 0; /* for multi_sz */ 1559 result = strdup((char*)buf); 1560 if(!result) log_err("out of memory"); 1561 } 1562 return result; 1563} 1564 1565void w_config_adjust_directory(struct config_file* cfg) 1566{ 1567 if(cfg->directory && cfg->directory[0]) { 1568 TCHAR dirbuf[2*MAX_PATH+4]; 1569 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) { 1570 /* get executable path, and if that contains 1571 * directories, snip off the filename part */ 1572 dirbuf[0] = 0; 1573 if(!GetModuleFileName(NULL, dirbuf, MAX_PATH)) 1574 log_err("could not GetModuleFileName"); 1575 if(strrchr(dirbuf, '\\')) { 1576 (strrchr(dirbuf, '\\'))[0] = 0; 1577 } else log_err("GetModuleFileName had no path"); 1578 if(dirbuf[0]) { 1579 /* adjust directory for later lookups to work*/ 1580 free(cfg->directory); 1581 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1); 1582 } 1583 } 1584 } 1585} 1586#endif /* UB_ON_WINDOWS */ 1587 1588void errinf(struct module_qstate* qstate, const char* str) 1589{ 1590 struct config_strlist* p; 1591 if(qstate->env->cfg->val_log_level < 2 || !str) 1592 return; 1593 p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p)); 1594 if(!p) { 1595 log_err("malloc failure in validator-error-info string"); 1596 return; 1597 } 1598 p->next = NULL; 1599 p->str = regional_strdup(qstate->region, str); 1600 if(!p->str) { 1601 log_err("malloc failure in validator-error-info string"); 1602 return; 1603 } 1604 /* add at end */ 1605 if(qstate->errinf) { 1606 struct config_strlist* q = qstate->errinf; 1607 while(q->next) 1608 q = q->next; 1609 q->next = p; 1610 } else qstate->errinf = p; 1611} 1612 1613void errinf_origin(struct module_qstate* qstate, struct sock_list *origin) 1614{ 1615 struct sock_list* p; 1616 if(qstate->env->cfg->val_log_level < 2) 1617 return; 1618 for(p=origin; p; p=p->next) { 1619 char buf[256]; 1620 if(p == origin) 1621 snprintf(buf, sizeof(buf), "from "); 1622 else snprintf(buf, sizeof(buf), "and "); 1623 if(p->len == 0) 1624 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), 1625 "cache"); 1626 else 1627 addr_to_str(&p->addr, p->len, buf+strlen(buf), 1628 sizeof(buf)-strlen(buf)); 1629 errinf(qstate, buf); 1630 } 1631} 1632 1633char* errinf_to_str(struct module_qstate* qstate) 1634{ 1635 char buf[20480]; 1636 char* p = buf; 1637 size_t left = sizeof(buf); 1638 struct config_strlist* s; 1639 char dname[LDNS_MAX_DOMAINLEN+1]; 1640 char t[16], c[16]; 1641 sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t)); 1642 sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c)); 1643 dname_str(qstate->qinfo.qname, dname); 1644 snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c); 1645 left -= strlen(p); p += strlen(p); 1646 if(!qstate->errinf) 1647 snprintf(p, left, " misc failure"); 1648 else for(s=qstate->errinf; s; s=s->next) { 1649 snprintf(p, left, " %s", s->str); 1650 left -= strlen(p); p += strlen(p); 1651 } 1652 p = strdup(buf); 1653 if(!p) 1654 log_err("malloc failure in errinf_to_str"); 1655 return p; 1656} 1657 1658void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr) 1659{ 1660 char buf[1024]; 1661 char dname[LDNS_MAX_DOMAINLEN+1]; 1662 char t[16], c[16]; 1663 if(qstate->env->cfg->val_log_level < 2 || !rr) 1664 return; 1665 sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t)); 1666 sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c)); 1667 dname_str(rr->rk.dname, dname); 1668 snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c); 1669 errinf(qstate, buf); 1670} 1671 1672void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname) 1673{ 1674 char b[1024]; 1675 char buf[LDNS_MAX_DOMAINLEN+1]; 1676 if(qstate->env->cfg->val_log_level < 2 || !str || !dname) 1677 return; 1678 dname_str(dname, buf); 1679 snprintf(b, sizeof(b), "%s %s", str, buf); 1680 errinf(qstate, b); 1681} 1682