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 #include <errno.h> 46 #ifdef HAVE_TIME_H 47 #include <time.h> 48 #endif 49 #include <limits.h> 50 #include "util/log.h" 51 #include "util/configyyrename.h" 52 #include "util/config_file.h" 53 #include "configparser.h" 54 #include "util/net_help.h" 55 #include "util/data/msgparse.h" 56 #include "util/module.h" 57 #include "util/regional.h" 58 #include "util/fptr_wlist.h" 59 #include "util/data/dname.h" 60 #include "util/random.h" 61 #include "util/rtt.h" 62 #include "services/cache/infra.h" 63 #include "sldns/wire2str.h" 64 #include "sldns/parseutil.h" 65 #include "iterator/iterator.h" 66 #ifdef HAVE_SYS_STAT_H 67 #include <sys/stat.h> 68 #endif 69 #ifdef HAVE_GLOB_H 70 # include <glob.h> 71 #endif 72 #ifdef CLIENT_SUBNET 73 #include "edns-subnet/edns-subnet.h" 74 #endif 75 #ifdef HAVE_PWD_H 76 #include <pwd.h> 77 #endif 78 79 /** from cfg username, after daemonize setup performed */ 80 uid_t cfg_uid = (uid_t)-1; 81 /** from cfg username, after daemonize setup performed */ 82 gid_t cfg_gid = (gid_t)-1; 83 /** for debug allow small timeout values for fast rollovers */ 84 int autr_permit_small_holddown = 0; 85 /** size (in bytes) of stream wait buffers max */ 86 size_t stream_wait_max = 4 * 1024 * 1024; 87 size_t http2_query_buffer_max = 4 * 1024 * 1024; 88 size_t http2_response_buffer_max = 4 * 1024 * 1024; 89 90 /** global config during parsing */ 91 struct config_parser_state* cfg_parser = 0; 92 93 /** init ports possible for use */ 94 static void init_outgoing_availports(int* array, int num); 95 96 /** init cookie with random data */ 97 static int init_cookie_secret(struct config_file* cfg); 98 99 struct config_file* 100 config_create(void) 101 { 102 struct config_file* cfg; 103 cfg = (struct config_file*)calloc(1, sizeof(struct config_file)); 104 if(!cfg) 105 return NULL; 106 /* the defaults if no config is present */ 107 cfg->verbosity = 1; 108 cfg->stat_interval = 0; 109 cfg->stat_cumulative = 0; 110 cfg->stat_extended = 0; 111 cfg->stat_inhibit_zero = 1; 112 cfg->num_threads = 1; 113 cfg->port = UNBOUND_DNS_PORT; 114 cfg->do_ip4 = 1; 115 cfg->do_ip6 = 1; 116 cfg->do_udp = 1; 117 cfg->do_tcp = 1; 118 cfg->tcp_reuse_timeout = 60 * 1000; /* 60s in milisecs */ 119 cfg->max_reuse_tcp_queries = 200; 120 cfg->tcp_upstream = 0; 121 cfg->udp_upstream_without_downstream = 0; 122 cfg->tcp_mss = 0; 123 cfg->outgoing_tcp_mss = 0; 124 cfg->tcp_idle_timeout = 30 * 1000; /* 30s in millisecs */ 125 cfg->tcp_auth_query_timeout = 3 * 1000; /* 3s in millisecs */ 126 cfg->do_tcp_keepalive = 0; 127 cfg->tcp_keepalive_timeout = 120 * 1000; /* 120s in millisecs */ 128 cfg->sock_queue_timeout = 0; /* do not check timeout */ 129 cfg->ssl_service_key = NULL; 130 cfg->ssl_service_pem = NULL; 131 cfg->ssl_port = UNBOUND_DNS_OVER_TLS_PORT; 132 cfg->ssl_upstream = 0; 133 cfg->tls_cert_bundle = NULL; 134 cfg->tls_win_cert = 0; 135 cfg->tls_use_sni = 1; 136 if(!(cfg->tls_protocols = strdup("TLSv1.2 TLSv1.3"))) goto error_exit; 137 cfg->https_port = UNBOUND_DNS_OVER_HTTPS_PORT; 138 if(!(cfg->http_endpoint = strdup("/dns-query"))) goto error_exit; 139 cfg->http_max_streams = 100; 140 cfg->http_query_buffer_size = 4*1024*1024; 141 cfg->http_response_buffer_size = 4*1024*1024; 142 cfg->http_nodelay = 1; 143 cfg->quic_port = UNBOUND_DNS_OVER_QUIC_PORT; 144 cfg->quic_size = 8*1024*1024; 145 cfg->use_syslog = 1; 146 cfg->log_identity = NULL; /* changed later with argv[0] */ 147 cfg->log_time_ascii = 0; 148 cfg->log_time_iso = 0; 149 cfg->log_queries = 0; 150 cfg->log_replies = 0; 151 cfg->log_tag_queryreply = 0; 152 cfg->log_local_actions = 0; 153 cfg->log_servfail = 0; 154 cfg->log_destaddr = 0; 155 cfg->log_thread_id = 0; 156 #ifndef USE_WINSOCK 157 # ifdef USE_MINI_EVENT 158 /* select max 1024 sockets */ 159 cfg->outgoing_num_ports = 960; 160 cfg->num_queries_per_thread = 512; 161 # else 162 /* libevent can use many sockets */ 163 cfg->outgoing_num_ports = 4096; 164 cfg->num_queries_per_thread = 2048; 165 # endif 166 cfg->outgoing_num_tcp = 10; 167 cfg->incoming_num_tcp = 10; 168 #else 169 cfg->outgoing_num_ports = 48; /* windows is limited in num fds */ 170 cfg->num_queries_per_thread = 24; 171 cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */ 172 cfg->incoming_num_tcp = 2; 173 #endif 174 cfg->stream_wait_size = 4 * 1024 * 1024; 175 cfg->edns_buffer_size = 1232; /* from DNS flagday recommendation */ 176 cfg->msg_buffer_size = 65552; /* 64 k + a small margin */ 177 cfg->msg_cache_size = 4 * 1024 * 1024; 178 cfg->msg_cache_slabs = 0; 179 cfg->jostle_time = 200; 180 cfg->rrset_cache_size = 4 * 1024 * 1024; 181 cfg->rrset_cache_slabs = 0; 182 cfg->host_ttl = 900; 183 cfg->bogus_ttl = 60; 184 cfg->min_ttl = 0; 185 cfg->max_ttl = 3600 * 24; 186 cfg->max_negative_ttl = 3600; 187 cfg->min_negative_ttl = 0; 188 cfg->prefetch = 0; 189 cfg->prefetch_key = 0; 190 cfg->deny_any = 0; 191 cfg->infra_cache_slabs = 0; 192 cfg->infra_cache_numhosts = 10000; 193 cfg->infra_cache_min_rtt = 50; 194 cfg->infra_cache_max_rtt = 120000; 195 cfg->infra_keep_probing = 0; 196 cfg->delay_close = 0; 197 cfg->udp_connect = 1; 198 if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int)))) 199 goto error_exit; 200 init_outgoing_availports(cfg->outgoing_avail_ports, 65536); 201 if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit; 202 #ifdef HAVE_CHROOT 203 if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit; 204 #endif 205 if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit; 206 if(!(cfg->logfile = strdup(""))) goto error_exit; 207 if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit; 208 if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit; 209 cfg->fast_server_permil = 0; 210 cfg->fast_server_num = 3; 211 cfg->donotqueryaddrs = NULL; 212 cfg->donotquery_localhost = 1; 213 cfg->root_hints = NULL; 214 cfg->use_systemd = 0; 215 cfg->do_daemonize = 1; 216 cfg->if_automatic = 0; 217 cfg->if_automatic_ports = NULL; 218 cfg->so_rcvbuf = 0; 219 cfg->so_sndbuf = 4*1024*1024; 220 cfg->so_reuseport = REUSEPORT_DEFAULT; 221 cfg->ip_transparent = 0; 222 cfg->ip_freebind = 0; 223 cfg->ip_dscp = 0; 224 cfg->num_ifs = 0; 225 cfg->ifs = NULL; 226 cfg->num_out_ifs = 0; 227 cfg->out_ifs = NULL; 228 cfg->stubs = NULL; 229 cfg->forwards = NULL; 230 cfg->auths = NULL; 231 #ifdef CLIENT_SUBNET 232 cfg->client_subnet = NULL; 233 cfg->client_subnet_zone = NULL; 234 cfg->client_subnet_opcode = LDNS_EDNS_CLIENT_SUBNET; 235 cfg->client_subnet_always_forward = 0; 236 cfg->max_client_subnet_ipv4 = 24; 237 cfg->max_client_subnet_ipv6 = 56; 238 cfg->min_client_subnet_ipv4 = 0; 239 cfg->min_client_subnet_ipv6 = 0; 240 cfg->max_ecs_tree_size_ipv4 = 100; 241 cfg->max_ecs_tree_size_ipv6 = 100; 242 #endif 243 cfg->views = NULL; 244 cfg->acls = NULL; 245 cfg->tcp_connection_limits = NULL; 246 cfg->harden_short_bufsize = 1; 247 cfg->harden_large_queries = 0; 248 cfg->harden_glue = 1; 249 cfg->harden_unverified_glue = 0; 250 cfg->harden_dnssec_stripped = 1; 251 cfg->harden_below_nxdomain = 1; 252 cfg->harden_referral_path = 0; 253 cfg->harden_algo_downgrade = 0; 254 cfg->harden_unknown_additional = 0; 255 cfg->use_caps_bits_for_id = 0; 256 cfg->caps_whitelist = NULL; 257 cfg->private_address = NULL; 258 cfg->private_domain = NULL; 259 cfg->unwanted_threshold = 0; 260 cfg->hide_identity = 0; 261 cfg->hide_version = 0; 262 cfg->hide_trustanchor = 0; 263 cfg->hide_http_user_agent = 0; 264 cfg->identity = NULL; 265 cfg->version = NULL; 266 cfg->http_user_agent = NULL; 267 cfg->nsid_cfg_str = NULL; 268 cfg->nsid = NULL; 269 cfg->nsid_len = 0; 270 cfg->auto_trust_anchor_file_list = NULL; 271 cfg->trust_anchor_file_list = NULL; 272 cfg->trust_anchor_list = NULL; 273 cfg->trusted_keys_file_list = NULL; 274 cfg->trust_anchor_signaling = 1; 275 cfg->root_key_sentinel = 1; 276 cfg->domain_insecure = NULL; 277 cfg->val_date_override = 0; 278 cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */ 279 cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */ 280 cfg->val_max_restart = 5; 281 cfg->val_clean_additional = 0; /* off to protect against much data. */ 282 cfg->val_log_level = 0; 283 cfg->val_log_squelch = 0; 284 cfg->val_permissive_mode = 0; 285 cfg->aggressive_nsec = 1; 286 cfg->ignore_cd = 0; 287 cfg->disable_edns_do = 0; 288 cfg->serve_expired = 0; 289 cfg->serve_expired_ttl = 86400; 290 cfg->serve_expired_ttl_reset = 0; 291 cfg->serve_expired_reply_ttl = 30; 292 cfg->serve_expired_client_timeout = 1800; 293 cfg->serve_original_ttl = 0; 294 cfg->zonemd_permissive_mode = 0; 295 cfg->add_holddown = 30*24*3600; 296 cfg->del_holddown = 30*24*3600; 297 cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */ 298 cfg->permit_small_holddown = 0; 299 cfg->key_cache_size = 4 * 1024 * 1024; 300 cfg->key_cache_slabs = 0; 301 cfg->neg_cache_size = 1 * 1024 * 1024; 302 cfg->local_zones = NULL; 303 cfg->local_zones_nodefault = NULL; 304 #ifdef USE_IPSET 305 cfg->local_zones_ipset = NULL; 306 #endif 307 cfg->local_zones_disable_default = 0; 308 cfg->local_data = NULL; 309 cfg->local_zone_overrides = NULL; 310 cfg->unblock_lan_zones = 0; 311 cfg->insecure_lan_zones = 0; 312 cfg->python_script = NULL; 313 cfg->dynlib_file = NULL; 314 cfg->remote_control_enable = 0; 315 cfg->control_ifs.first = NULL; 316 cfg->control_ifs.last = NULL; 317 cfg->control_port = UNBOUND_CONTROL_PORT; 318 cfg->control_use_cert = 1; 319 cfg->minimal_responses = 1; 320 cfg->rrset_roundrobin = 1; 321 cfg->unknown_server_time_limit = 376; 322 cfg->discard_timeout = 1900; /* msec */ 323 cfg->wait_limit = 1000; 324 cfg->wait_limit_cookie = 10000; 325 cfg->wait_limit_netblock = NULL; 326 cfg->wait_limit_cookie_netblock = NULL; 327 cfg->max_udp_size = 1232; /* value taken from edns_buffer_size */ 328 if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key"))) 329 goto error_exit; 330 if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem"))) 331 goto error_exit; 332 if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key"))) 333 goto error_exit; 334 if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem"))) 335 goto error_exit; 336 337 if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit; 338 if(!(cfg->val_nsec3_key_iterations = 339 strdup("1024 150 2048 150 4096 150"))) goto error_exit; 340 #if defined(DNSTAP_SOCKET_PATH) 341 if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH))) 342 goto error_exit; 343 #endif 344 cfg->dnstap_bidirectional = 1; 345 cfg->dnstap_tls = 1; 346 cfg->disable_dnssec_lame_check = 0; 347 cfg->ip_ratelimit_cookie = 0; 348 cfg->ip_ratelimit = 0; 349 cfg->ratelimit = 0; 350 cfg->ip_ratelimit_slabs = 0; 351 cfg->ratelimit_slabs = 0; 352 cfg->ip_ratelimit_size = 4*1024*1024; 353 cfg->ratelimit_size = 4*1024*1024; 354 cfg->ratelimit_for_domain = NULL; 355 cfg->ratelimit_below_domain = NULL; 356 cfg->ip_ratelimit_factor = 10; 357 cfg->ratelimit_factor = 10; 358 cfg->ip_ratelimit_backoff = 0; 359 cfg->ratelimit_backoff = 0; 360 cfg->outbound_msg_retry = 5; 361 cfg->max_sent_count = 32; 362 cfg->max_query_restarts = 11; 363 cfg->qname_minimisation = 1; 364 cfg->qname_minimisation_strict = 0; 365 cfg->shm_enable = 0; 366 cfg->shm_key = 11777; 367 cfg->edns_client_strings = NULL; 368 cfg->edns_client_string_opcode = 65001; 369 cfg->dnscrypt = 0; 370 cfg->dnscrypt_port = 0; 371 cfg->dnscrypt_provider = NULL; 372 cfg->dnscrypt_provider_cert = NULL; 373 cfg->dnscrypt_provider_cert_rotated = NULL; 374 cfg->dnscrypt_secret_key = NULL; 375 cfg->dnscrypt_shared_secret_cache_size = 4*1024*1024; 376 cfg->dnscrypt_shared_secret_cache_slabs = 0; 377 cfg->dnscrypt_nonce_cache_size = 4*1024*1024; 378 cfg->dnscrypt_nonce_cache_slabs = 0; 379 cfg->pad_responses = 1; 380 cfg->pad_responses_block_size = 468; /* from RFC8467 */ 381 cfg->pad_queries = 1; 382 cfg->pad_queries_block_size = 128; /* from RFC8467 */ 383 #ifdef USE_IPSECMOD 384 cfg->ipsecmod_enabled = 1; 385 cfg->ipsecmod_ignore_bogus = 0; 386 cfg->ipsecmod_hook = NULL; 387 cfg->ipsecmod_max_ttl = 3600; 388 cfg->ipsecmod_whitelist = NULL; 389 cfg->ipsecmod_strict = 0; 390 #endif 391 cfg->do_answer_cookie = 0; 392 memset(cfg->cookie_secret, 0, sizeof(cfg->cookie_secret)); 393 cfg->cookie_secret_len = 0; /* not set yet */ 394 cfg->cookie_secret_file = NULL; 395 #ifdef USE_CACHEDB 396 if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit; 397 if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit; 398 cfg->cachedb_no_store = 0; 399 cfg->cachedb_check_when_serve_expired = 1; 400 #ifdef USE_REDIS 401 if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit; 402 if(!(cfg->redis_replica_server_host = strdup(""))) goto error_exit; 403 cfg->redis_server_path = NULL; 404 cfg->redis_replica_server_path = NULL; 405 cfg->redis_server_password = NULL; 406 cfg->redis_replica_server_password = NULL; 407 cfg->redis_timeout = 100; 408 cfg->redis_replica_timeout = 100; 409 cfg->redis_command_timeout = 0; 410 cfg->redis_replica_command_timeout = 0; 411 cfg->redis_connect_timeout = 0; 412 cfg->redis_replica_connect_timeout = 0; 413 cfg->redis_server_port = 6379; 414 cfg->redis_replica_server_port = 6379; 415 cfg->redis_expire_records = 0; 416 cfg->redis_logical_db = 0; 417 cfg->redis_replica_logical_db = 0; 418 #endif /* USE_REDIS */ 419 #endif /* USE_CACHEDB */ 420 #ifdef USE_IPSET 421 cfg->ipset_name_v4 = NULL; 422 cfg->ipset_name_v6 = NULL; 423 #endif 424 cfg->ede = 0; 425 cfg->ede_serve_expired = 0; 426 cfg->dns_error_reporting = 0; 427 cfg->iter_scrub_ns = 20; 428 cfg->iter_scrub_cname = 11; 429 cfg->iter_scrub_rrsig = 8; 430 cfg->iter_scrub_promiscuous = 1; 431 cfg->max_global_quota = 200; 432 cfg->val_validation_attempts = 32; 433 cfg->val_hash_attempts = 32; 434 return cfg; 435 error_exit: 436 config_delete(cfg); 437 return NULL; 438 } 439 440 struct config_file* config_create_forlib(void) 441 { 442 struct config_file* cfg = config_create(); 443 if(!cfg) return NULL; 444 /* modifications for library use, less verbose, less memory */ 445 free(cfg->chrootdir); 446 cfg->chrootdir = NULL; 447 cfg->verbosity = 0; 448 cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable' 449 and probably within the ulimit(maxfds) of the user */ 450 cfg->outgoing_num_tcp = 2; 451 cfg->msg_cache_size = 1024*1024; 452 cfg->msg_cache_slabs = 1; 453 cfg->rrset_cache_size = 1024*1024; 454 cfg->rrset_cache_slabs = 1; 455 cfg->infra_cache_slabs = 1; 456 cfg->use_syslog = 0; 457 cfg->key_cache_size = 1024*1024; 458 cfg->key_cache_slabs = 1; 459 cfg->neg_cache_size = 100 * 1024; 460 cfg->donotquery_localhost = 0; /* allow, so that you can ask a 461 forward nameserver running on localhost */ 462 cfg->val_log_level = 2; /* to fill why_bogus with */ 463 cfg->val_log_squelch = 1; 464 cfg->minimal_responses = 0; 465 cfg->harden_short_bufsize = 1; 466 /* Need to explicitly define the slabs from their 0 default value */ 467 cfg->ip_ratelimit_slabs = 1; 468 cfg->ratelimit_slabs = 1; 469 cfg->dnscrypt_shared_secret_cache_slabs = 1; 470 cfg->dnscrypt_nonce_cache_slabs = 1; 471 return cfg; 472 } 473 474 /** check that the value passed is >= 0 */ 475 #define IS_NUMBER_OR_ZERO \ 476 if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0 477 /** check that the value passed is > 0 */ 478 #define IS_NONZERO_NUMBER \ 479 if(atoi(val) == 0) return 0 480 /** check that the value passed is not 0 and a power of 2 */ 481 #define IS_POW2_NUMBER \ 482 if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0 483 /** check that the value passed is yes or no */ 484 #define IS_YES_OR_NO \ 485 if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0 486 /** put integer_or_zero into variable */ 487 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 488 { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); } 489 /** put integer_nonzero into variable */ 490 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \ 491 { IS_NONZERO_NUMBER; cfg->var = atoi(val); } 492 /** put integer_or_zero into unsigned */ 493 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 494 { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); } 495 /** put integer_or_zero into size_t */ 496 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 497 { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); } 498 /** put integer_nonzero into size_t */ 499 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \ 500 { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); } 501 /** put yesno into variable */ 502 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \ 503 { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); } 504 /** put memsize into variable */ 505 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \ 506 { return cfg_parse_memsize(val, &cfg->var); } 507 /** put pow2 number into variable */ 508 #define S_POW2(str, var) if(strcmp(opt, str)==0) \ 509 { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); } 510 /** put string into variable */ 511 #define S_STR(str, var) if(strcmp(opt, str)==0) \ 512 { free(cfg->var); return (cfg->var = strdup(val)) != NULL; } 513 /** put string into strlist */ 514 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \ 515 { return cfg_strlist_insert(&cfg->var, strdup(val)); } 516 /** put string into strlist if not present yet*/ 517 #define S_STRLIST_UNIQ(str, var) if(strcmp(opt, str)==0) \ 518 { if(cfg_strlist_find(cfg->var, val)) { return 0;} \ 519 return cfg_strlist_insert(&cfg->var, strdup(val)); } 520 /** append string to strlist */ 521 #define S_STRLIST_APPEND(str, var) if(strcmp(opt, str)==0) \ 522 { return cfg_strlist_append(&cfg->var, strdup(val)); } 523 524 /** Set PROBE_MAXRTO based on current RTT_MAX_TIMEOUT 525 * (USEFUL_SERVER_TOP_TIMEOUT) configuration. */ 526 static int 527 probe_maxrto(int useful_server_top_timeout) { 528 return 529 PROBE_MAXRTO > useful_server_top_timeout 530 ?useful_server_top_timeout 531 :PROBE_MAXRTO_DEFAULT; 532 } 533 534 /** Apply the relevant changes that rely upon RTT_MAX_TIMEOUT */ 535 int config_apply_max_rtt(int max_rtt) 536 { 537 USEFUL_SERVER_TOP_TIMEOUT = max_rtt; 538 BLACKLIST_PENALTY = 539 #ifdef INT_MAX 540 (max_rtt > INT_MAX/4) ? INT_MAX : 541 #endif 542 max_rtt*4; 543 PROBE_MAXRTO = probe_maxrto(max_rtt); 544 return max_rtt; 545 } 546 547 int config_set_option(struct config_file* cfg, const char* opt, 548 const char* val) 549 { 550 char buf[64]; 551 if(!opt) return 0; 552 if(opt[strlen(opt)-1] != ':' && strlen(opt)+2<sizeof(buf)) { 553 snprintf(buf, sizeof(buf), "%s:", opt); 554 opt = buf; 555 } 556 S_NUMBER_OR_ZERO("verbosity:", verbosity) 557 else if(strcmp(opt, "statistics-interval:") == 0) { 558 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0) 559 cfg->stat_interval = 0; 560 else if(atoi(val) == 0) 561 return 0; 562 else cfg->stat_interval = atoi(val); 563 } else if(strcmp(opt, "num-threads:") == 0) { 564 /* not supported, library must have 1 thread in bgworker */ 565 return 0; 566 } else if(strcmp(opt, "outgoing-port-permit:") == 0) { 567 return cfg_mark_ports(val, 1, 568 cfg->outgoing_avail_ports, 65536); 569 } else if(strcmp(opt, "outgoing-port-avoid:") == 0) { 570 return cfg_mark_ports(val, 0, 571 cfg->outgoing_avail_ports, 65536); 572 } else if(strcmp(opt, "local-zone:") == 0) { 573 return cfg_parse_local_zone(cfg, val); 574 } else if(strcmp(opt, "val-override-date:") == 0) { 575 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) { 576 cfg->val_date_override = 0; 577 } else if(strlen(val) == 14) { 578 cfg->val_date_override = cfg_convert_timeval(val); 579 return cfg->val_date_override != 0; 580 } else { 581 if(atoi(val) == 0) return 0; 582 cfg->val_date_override = (uint32_t)atoi(val); 583 } 584 } else if(strcmp(opt, "local-data-ptr:") == 0) { 585 char* ptr = cfg_ptr_reverse((char*)opt); 586 return cfg_strlist_insert(&cfg->local_data, ptr); 587 } else if(strcmp(opt, "logfile:") == 0) { 588 cfg->use_syslog = 0; 589 free(cfg->logfile); 590 return (cfg->logfile = strdup(val)) != NULL; 591 } 592 else if(strcmp(opt, "log-time-ascii:") == 0) 593 { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0); 594 log_set_time_asc(cfg->log_time_ascii); } 595 else if(strcmp(opt, "log-time-iso:") == 0) 596 { IS_YES_OR_NO; cfg->log_time_iso = (strcmp(val, "yes") == 0); 597 log_set_time_iso(cfg->log_time_iso); } 598 else S_SIZET_NONZERO("max-udp-size:", max_udp_size) 599 else S_YNO("use-syslog:", use_syslog) 600 else S_STR("log-identity:", log_identity) 601 else S_YNO("extended-statistics:", stat_extended) 602 else S_YNO("statistics-inhibit-zero:", stat_inhibit_zero) 603 else S_YNO("statistics-cumulative:", stat_cumulative) 604 else S_YNO("shm-enable:", shm_enable) 605 else S_NUMBER_OR_ZERO("shm-key:", shm_key) 606 else S_YNO("do-ip4:", do_ip4) 607 else S_YNO("do-ip6:", do_ip6) 608 else S_YNO("do-udp:", do_udp) 609 else S_YNO("do-tcp:", do_tcp) 610 else S_YNO("prefer-ip4:", prefer_ip4) 611 else S_YNO("prefer-ip6:", prefer_ip6) 612 else S_YNO("tcp-upstream:", tcp_upstream) 613 else S_YNO("udp-upstream-without-downstream:", 614 udp_upstream_without_downstream) 615 else S_NUMBER_NONZERO("tcp-mss:", tcp_mss) 616 else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss) 617 else S_NUMBER_NONZERO("tcp-auth-query-timeout:", tcp_auth_query_timeout) 618 else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout) 619 else S_NUMBER_NONZERO("max-reuse-tcp-queries:", max_reuse_tcp_queries) 620 else S_NUMBER_NONZERO("tcp-reuse-timeout:", tcp_reuse_timeout) 621 else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive) 622 else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout) 623 else S_NUMBER_OR_ZERO("sock-queue-timeout:", sock_queue_timeout) 624 else S_YNO("ssl-upstream:", ssl_upstream) 625 else S_YNO("tls-upstream:", ssl_upstream) 626 else S_STR("ssl-service-key:", ssl_service_key) 627 else S_STR("tls-service-key:", ssl_service_key) 628 else S_STR("ssl-service-pem:", ssl_service_pem) 629 else S_STR("tls-service-pem:", ssl_service_pem) 630 else S_NUMBER_NONZERO("ssl-port:", ssl_port) 631 else S_NUMBER_NONZERO("tls-port:", ssl_port) 632 else S_STR("ssl-cert-bundle:", tls_cert_bundle) 633 else S_STR("tls-cert-bundle:", tls_cert_bundle) 634 else S_YNO("tls-win-cert:", tls_win_cert) 635 else S_YNO("tls-system-cert:", tls_win_cert) 636 else S_STRLIST("additional-ssl-port:", tls_additional_port) 637 else S_STRLIST("additional-tls-port:", tls_additional_port) 638 else S_STRLIST("tls-additional-ports:", tls_additional_port) 639 else S_STRLIST("tls-additional-port:", tls_additional_port) 640 else S_STRLIST_APPEND("tls-session-ticket-keys:", tls_session_ticket_keys) 641 else S_STR("tls-ciphers:", tls_ciphers) 642 else S_STR("tls-ciphersuites:", tls_ciphersuites) 643 else S_YNO("tls-use-sni:", tls_use_sni) 644 else if(strcmp(opt, "tls-protocols:") == 0) { 645 if(!cfg_tls_protocols_is_valid(val)) return 0; 646 free(cfg->tls_protocols); 647 return (cfg->tls_protocols = strdup(val)) != NULL; 648 } 649 else S_NUMBER_NONZERO("https-port:", https_port) 650 else S_STR("http-endpoint:", http_endpoint) 651 else S_NUMBER_NONZERO("http-max-streams:", http_max_streams) 652 else S_MEMSIZE("http-query-buffer-size:", http_query_buffer_size) 653 else S_MEMSIZE("http-response-buffer-size:", http_response_buffer_size) 654 else S_YNO("http-nodelay:", http_nodelay) 655 else S_YNO("http-notls-downstream:", http_notls_downstream) 656 else S_NUMBER_NONZERO("quic-port:", quic_port) 657 else S_MEMSIZE("quic-size:", quic_size) 658 else S_YNO("interface-automatic:", if_automatic) 659 else S_STR("interface-automatic-ports:", if_automatic_ports) 660 else S_YNO("use-systemd:", use_systemd) 661 else S_YNO("do-daemonize:", do_daemonize) 662 else S_NUMBER_NONZERO("port:", port) 663 else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports) 664 else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp) 665 else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp) 666 else S_MEMSIZE("stream-wait-size:", stream_wait_size) 667 else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size) 668 else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size) 669 else S_MEMSIZE("msg-cache-size:", msg_cache_size) 670 else S_POW2("msg-cache-slabs:", msg_cache_slabs) 671 else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread) 672 else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time) 673 else S_MEMSIZE("so-rcvbuf:", so_rcvbuf) 674 else S_MEMSIZE("so-sndbuf:", so_sndbuf) 675 else S_YNO("so-reuseport:", so_reuseport) 676 else S_YNO("ip-transparent:", ip_transparent) 677 else S_YNO("ip-freebind:", ip_freebind) 678 else S_NUMBER_OR_ZERO("ip-dscp:", ip_dscp) 679 else S_MEMSIZE("rrset-cache-size:", rrset_cache_size) 680 else S_POW2("rrset-cache-slabs:", rrset_cache_slabs) 681 else S_YNO("prefetch:", prefetch) 682 else S_YNO("prefetch-key:", prefetch_key) 683 else S_YNO("deny-any:", deny_any) 684 else if(strcmp(opt, "cache-max-ttl:") == 0) 685 { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;} 686 else if(strcmp(opt, "cache-max-negative-ttl:") == 0) 687 { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;} 688 else if(strcmp(opt, "cache-min-negative-ttl:") == 0) 689 { IS_NUMBER_OR_ZERO; cfg->min_negative_ttl = atoi(val); MIN_NEG_TTL=(time_t)cfg->min_negative_ttl;} 690 else if(strcmp(opt, "cache-min-ttl:") == 0) 691 { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;} 692 else if(strcmp(opt, "infra-cache-min-rtt:") == 0) { 693 IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val); 694 RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt; 695 } 696 else if(strcmp(opt, "infra-cache-max-rtt:") == 0) { 697 IS_NUMBER_OR_ZERO; cfg->infra_cache_max_rtt = atoi(val); 698 RTT_MAX_TIMEOUT=config_apply_max_rtt(cfg->infra_cache_max_rtt); 699 } 700 else S_YNO("infra-keep-probing:", infra_keep_probing) 701 else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl) 702 else S_POW2("infra-cache-slabs:", infra_cache_slabs) 703 else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts) 704 else S_NUMBER_OR_ZERO("delay-close:", delay_close) 705 else S_YNO("udp-connect:", udp_connect) 706 else S_STR("chroot:", chrootdir) 707 else S_STR("username:", username) 708 else S_STR("directory:", directory) 709 else S_STR("pidfile:", pidfile) 710 else S_YNO("hide-identity:", hide_identity) 711 else S_YNO("hide-version:", hide_version) 712 else S_YNO("hide-trustanchor:", hide_trustanchor) 713 else S_YNO("hide-http-user-agent:", hide_http_user_agent) 714 else S_STR("identity:", identity) 715 else S_STR("version:", version) 716 else S_STR("http-user-agent:", http_user_agent) 717 else if(strcmp(opt, "nsid:") == 0) { 718 free(cfg->nsid_cfg_str); 719 if (!(cfg->nsid_cfg_str = strdup(val))) 720 return 0; 721 /* Empty string is just validly unsetting nsid */ 722 if (*val == 0) { 723 free(cfg->nsid); 724 cfg->nsid = NULL; 725 cfg->nsid_len = 0; 726 return 1; 727 } 728 cfg->nsid = cfg_parse_nsid(val, &cfg->nsid_len); 729 return cfg->nsid != NULL; 730 } 731 else S_STRLIST("root-hints:", root_hints) 732 else S_STR("target-fetch-policy:", target_fetch_policy) 733 else S_YNO("harden-glue:", harden_glue) 734 else S_YNO("harden-unverified-glue:", harden_unverified_glue) 735 else S_YNO("harden-short-bufsize:", harden_short_bufsize) 736 else S_YNO("harden-large-queries:", harden_large_queries) 737 else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped) 738 else S_YNO("harden-below-nxdomain:", harden_below_nxdomain) 739 else S_YNO("harden-referral-path:", harden_referral_path) 740 else S_YNO("harden-algo-downgrade:", harden_algo_downgrade) 741 else S_YNO("harden-unknown-additional:", harden_unknown_additional) 742 else S_YNO("use-caps-for-id:", use_caps_bits_for_id) 743 else S_STRLIST("caps-whitelist:", caps_whitelist) 744 else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold) 745 else S_STRLIST("private-address:", private_address) 746 else S_STRLIST("private-domain:", private_domain) 747 else S_YNO("do-not-query-localhost:", donotquery_localhost) 748 else S_STRLIST("do-not-query-address:", donotqueryaddrs) 749 else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list) 750 else S_STRLIST("trust-anchor-file:", trust_anchor_file_list) 751 else S_STRLIST("trust-anchor:", trust_anchor_list) 752 else S_STRLIST("trusted-keys-file:", trusted_keys_file_list) 753 else S_YNO("trust-anchor-signaling:", trust_anchor_signaling) 754 else S_YNO("root-key-sentinel:", root_key_sentinel) 755 else S_STRLIST("domain-insecure:", domain_insecure) 756 else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl) 757 else S_YNO("val-clean-additional:", val_clean_additional) 758 else S_NUMBER_OR_ZERO("val-log-level:", val_log_level) 759 else S_YNO("val-log-squelch:", val_log_squelch) 760 else S_YNO("log-queries:", log_queries) 761 else S_YNO("log-replies:", log_replies) 762 else S_YNO("log-tag-queryreply:", log_tag_queryreply) 763 else S_YNO("log-local-actions:", log_local_actions) 764 else S_YNO("log-servfail:", log_servfail) 765 else S_YNO("log-destaddr:", log_destaddr) 766 else S_YNO("log-thread-id:", log_thread_id) 767 else S_YNO("val-permissive-mode:", val_permissive_mode) 768 else S_YNO("aggressive-nsec:", aggressive_nsec) 769 else S_YNO("ignore-cd-flag:", ignore_cd) 770 else S_YNO("disable-edns-do:", disable_edns_do) 771 else if(strcmp(opt, "serve-expired:") == 0) 772 { IS_YES_OR_NO; cfg->serve_expired = (strcmp(val, "yes") == 0); 773 SERVE_EXPIRED = cfg->serve_expired; } 774 else if(strcmp(opt, "serve-expired-ttl:") == 0) 775 { IS_NUMBER_OR_ZERO; cfg->serve_expired_ttl = atoi(val); SERVE_EXPIRED_TTL=(time_t)cfg->serve_expired_ttl;} 776 else if(strcmp(opt, "serve-expired-ttl-reset:") == 0) 777 { IS_YES_OR_NO; cfg->serve_expired_ttl_reset = (strcmp(val, "yes") == 0); 778 SERVE_EXPIRED_TTL_RESET = cfg->serve_expired_ttl_reset; } 779 else if(strcmp(opt, "serve-expired-reply-ttl:") == 0) 780 { IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;} 781 else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout) 782 else S_YNO("ede:", ede) 783 else S_YNO("ede-serve-expired:", ede_serve_expired) 784 else S_YNO("dns-error-reporting:", dns_error_reporting) 785 else S_NUMBER_NONZERO("iter-scrub-ns:", iter_scrub_ns) 786 else S_NUMBER_OR_ZERO("iter-scrub-cname:", iter_scrub_cname) 787 else S_NUMBER_OR_ZERO("iter-scrub-rrsig:", iter_scrub_rrsig) 788 else S_YNO("iter-scrub-promiscuous:", iter_scrub_promiscuous) 789 else S_NUMBER_OR_ZERO("max-global-quota:", max_global_quota) 790 else S_NUMBER_OR_ZERO("val-validation-attempts:", val_validation_attempts) 791 else S_NUMBER_OR_ZERO("val-hash-attempts:", val_hash_attempts) 792 else S_YNO("serve-original-ttl:", serve_original_ttl) 793 else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations) 794 else S_YNO("zonemd-permissive-mode:", zonemd_permissive_mode) 795 else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown) 796 else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown) 797 else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing) 798 else if(strcmp(opt, "permit-small-holddown:") == 0) 799 { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0); 800 autr_permit_small_holddown = cfg->permit_small_holddown; } 801 else S_MEMSIZE("key-cache-size:", key_cache_size) 802 else S_POW2("key-cache-slabs:", key_cache_slabs) 803 else S_MEMSIZE("neg-cache-size:", neg_cache_size) 804 else S_YNO("minimal-responses:", minimal_responses) 805 else S_YNO("rrset-roundrobin:", rrset_roundrobin) 806 else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit) 807 else S_NUMBER_OR_ZERO("discard-timeout:", discard_timeout) 808 else S_NUMBER_OR_ZERO("wait-limit:", wait_limit) 809 else S_NUMBER_OR_ZERO("wait-limit-cookie:", wait_limit_cookie) 810 else S_STRLIST("local-data:", local_data) 811 else S_YNO("unblock-lan-zones:", unblock_lan_zones) 812 else S_YNO("insecure-lan-zones:", insecure_lan_zones) 813 else S_YNO("control-enable:", remote_control_enable) 814 else S_STRLIST_APPEND("control-interface:", control_ifs) 815 else S_NUMBER_NONZERO("control-port:", control_port) 816 else S_STR("server-key-file:", server_key_file) 817 else S_STR("server-cert-file:", server_cert_file) 818 else S_STR("control-key-file:", control_key_file) 819 else S_STR("control-cert-file:", control_cert_file) 820 else S_STR("module-config:", module_conf) 821 else S_STRLIST("python-script:", python_script) 822 else S_STRLIST("dynlib-file:", dynlib_file) 823 else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check) 824 #ifdef CLIENT_SUBNET 825 /* Can't set max subnet prefix here, since that value is used when 826 * generating the address tree. */ 827 /* No client-subnet-always-forward here, module registration depends on 828 * this option. */ 829 #endif 830 #ifdef USE_DNSTAP 831 else S_YNO("dnstap-enable:", dnstap) 832 else S_YNO("dnstap-bidirectional:", dnstap_bidirectional) 833 else S_STR("dnstap-socket-path:", dnstap_socket_path) 834 else S_STR("dnstap-ip:", dnstap_ip) 835 else S_YNO("dnstap-tls:", dnstap_tls) 836 else S_STR("dnstap-tls-server-name:", dnstap_tls_server_name) 837 else S_STR("dnstap-tls-cert-bundle:", dnstap_tls_cert_bundle) 838 else S_STR("dnstap-tls-client-key-file:", dnstap_tls_client_key_file) 839 else S_STR("dnstap-tls-client-cert-file:", 840 dnstap_tls_client_cert_file) 841 else S_YNO("dnstap-send-identity:", dnstap_send_identity) 842 else S_YNO("dnstap-send-version:", dnstap_send_version) 843 else S_STR("dnstap-identity:", dnstap_identity) 844 else S_STR("dnstap-version:", dnstap_version) 845 else S_NUMBER_OR_ZERO("dnstap-sample-rate:", dnstap_sample_rate) 846 else S_YNO("dnstap-log-resolver-query-messages:", 847 dnstap_log_resolver_query_messages) 848 else S_YNO("dnstap-log-resolver-response-messages:", 849 dnstap_log_resolver_response_messages) 850 else S_YNO("dnstap-log-client-query-messages:", 851 dnstap_log_client_query_messages) 852 else S_YNO("dnstap-log-client-response-messages:", 853 dnstap_log_client_response_messages) 854 else S_YNO("dnstap-log-forwarder-query-messages:", 855 dnstap_log_forwarder_query_messages) 856 else S_YNO("dnstap-log-forwarder-response-messages:", 857 dnstap_log_forwarder_response_messages) 858 #endif 859 #ifdef USE_DNSCRYPT 860 else S_YNO("dnscrypt-enable:", dnscrypt) 861 else S_NUMBER_NONZERO("dnscrypt-port:", dnscrypt_port) 862 else S_STR("dnscrypt-provider:", dnscrypt_provider) 863 else S_STRLIST_UNIQ("dnscrypt-provider-cert:", dnscrypt_provider_cert) 864 else S_STRLIST("dnscrypt-provider-cert-rotated:", dnscrypt_provider_cert_rotated) 865 else S_STRLIST_UNIQ("dnscrypt-secret-key:", dnscrypt_secret_key) 866 else S_MEMSIZE("dnscrypt-shared-secret-cache-size:", 867 dnscrypt_shared_secret_cache_size) 868 else S_POW2("dnscrypt-shared-secret-cache-slabs:", 869 dnscrypt_shared_secret_cache_slabs) 870 else S_MEMSIZE("dnscrypt-nonce-cache-size:", 871 dnscrypt_nonce_cache_size) 872 else S_POW2("dnscrypt-nonce-cache-slabs:", 873 dnscrypt_nonce_cache_slabs) 874 #endif 875 else if(strcmp(opt, "ip-ratelimit-cookie:") == 0) { 876 IS_NUMBER_OR_ZERO; cfg->ip_ratelimit_cookie = atoi(val); 877 infra_ip_ratelimit_cookie=cfg->ip_ratelimit_cookie; 878 } 879 else if(strcmp(opt, "ip-ratelimit:") == 0) { 880 IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val); 881 infra_ip_ratelimit=cfg->ip_ratelimit; 882 } 883 else if(strcmp(opt, "ratelimit:") == 0) { 884 IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val); 885 infra_dp_ratelimit=cfg->ratelimit; 886 } 887 else S_MEMSIZE("ip-ratelimit-size:", ip_ratelimit_size) 888 else S_MEMSIZE("ratelimit-size:", ratelimit_size) 889 else S_POW2("ip-ratelimit-slabs:", ip_ratelimit_slabs) 890 else S_POW2("ratelimit-slabs:", ratelimit_slabs) 891 else S_NUMBER_OR_ZERO("ip-ratelimit-factor:", ip_ratelimit_factor) 892 else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor) 893 else S_YNO("ip-ratelimit-backoff:", ip_ratelimit_backoff) 894 else S_YNO("ratelimit-backoff:", ratelimit_backoff) 895 else S_NUMBER_NONZERO("outbound-msg-retry:", outbound_msg_retry) 896 else S_NUMBER_NONZERO("max-sent-count:", max_sent_count) 897 else S_NUMBER_NONZERO("max-query-restarts:", max_query_restarts) 898 else S_SIZET_NONZERO("fast-server-num:", fast_server_num) 899 else S_NUMBER_OR_ZERO("fast-server-permil:", fast_server_permil) 900 else S_YNO("qname-minimisation:", qname_minimisation) 901 else S_YNO("qname-minimisation-strict:", qname_minimisation_strict) 902 else S_YNO("pad-responses:", pad_responses) 903 else S_SIZET_NONZERO("pad-responses-block-size:", pad_responses_block_size) 904 else S_YNO("pad-queries:", pad_queries) 905 else S_SIZET_NONZERO("pad-queries-block-size:", pad_queries_block_size) 906 else S_STRLIST("proxy-protocol-port:", proxy_protocol_port) 907 #ifdef USE_IPSECMOD 908 else S_YNO("ipsecmod-enabled:", ipsecmod_enabled) 909 else S_YNO("ipsecmod-ignore-bogus:", ipsecmod_ignore_bogus) 910 else if(strcmp(opt, "ipsecmod-max-ttl:") == 0) 911 { IS_NUMBER_OR_ZERO; cfg->ipsecmod_max_ttl = atoi(val); } 912 else S_YNO("ipsecmod-strict:", ipsecmod_strict) 913 #endif 914 else S_YNO("answer-cookie:", do_answer_cookie) 915 else S_STR("cookie-secret-file:", cookie_secret_file) 916 #ifdef USE_CACHEDB 917 else S_YNO("cachedb-no-store:", cachedb_no_store) 918 else S_YNO("cachedb-check-when-serve-expired:", cachedb_check_when_serve_expired) 919 #endif /* USE_CACHEDB */ 920 else if(strcmp(opt, "define-tag:") ==0) { 921 return config_add_tag(cfg, val); 922 /* val_sig_skew_min, max and val_max_restart are copied into val_env 923 * during init so this does not update val_env with set_option */ 924 } else if(strcmp(opt, "val-sig-skew-min:") == 0) 925 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); } 926 else if(strcmp(opt, "val-sig-skew-max:") == 0) 927 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); } 928 else if(strcmp(opt, "val-max-restart:") == 0) 929 { IS_NUMBER_OR_ZERO; cfg->val_max_restart = (int32_t)atoi(val); } 930 else if (strcmp(opt, "outgoing-interface:") == 0) { 931 char* d = strdup(val); 932 char** oi = 933 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*)); 934 if(!d || !oi) { free(d); free(oi); return -1; } 935 if(cfg->out_ifs && cfg->num_out_ifs) { 936 memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*)); 937 free(cfg->out_ifs); 938 } 939 oi[cfg->num_out_ifs++] = d; 940 cfg->out_ifs = oi; 941 } else { 942 /* unknown or unsupported (from the set_option interface): 943 * interface, outgoing-interface, access-control, 944 * stub-zone, name, stub-addr, stub-host, stub-prime 945 * forward-first, stub-first, forward-ssl-upstream, 946 * stub-ssl-upstream, forward-zone, auth-zone 947 * name, forward-addr, forward-host, 948 * ratelimit-for-domain, ratelimit-below-domain, 949 * local-zone-tag, access-control-view, interface-*, 950 * send-client-subnet, client-subnet-always-forward, 951 * max-client-subnet-ipv4, max-client-subnet-ipv6, 952 * min-client-subnet-ipv4, min-client-subnet-ipv6, 953 * max-ecs-tree-size-ipv4, max-ecs-tree-size-ipv6, ipsecmod_hook, 954 * ipsecmod_whitelist. */ 955 return 0; 956 } 957 return 1; 958 } 959 960 void config_print_func(char* line, void* arg) 961 { 962 FILE* f = (FILE*)arg; 963 (void)fprintf(f, "%s\n", line); 964 } 965 966 /** collate func arg */ 967 struct config_collate_arg { 968 /** list of result items */ 969 struct config_strlist_head list; 970 /** if a malloc error occurred, 0 is OK */ 971 int status; 972 }; 973 974 void config_collate_func(char* line, void* arg) 975 { 976 struct config_collate_arg* m = (struct config_collate_arg*)arg; 977 if(m->status) 978 return; 979 if(!cfg_strlist_append(&m->list, strdup(line))) 980 m->status = 1; 981 } 982 983 int config_get_option_list(struct config_file* cfg, const char* opt, 984 struct config_strlist** list) 985 { 986 struct config_collate_arg m; 987 memset(&m, 0, sizeof(m)); 988 *list = NULL; 989 if(!config_get_option(cfg, opt, config_collate_func, &m)) 990 return 1; 991 if(m.status) { 992 config_delstrlist(m.list.first); 993 return 2; 994 } 995 *list = m.list.first; 996 return 0; 997 } 998 999 int 1000 config_get_option_collate(struct config_file* cfg, const char* opt, char** str) 1001 { 1002 struct config_strlist* list = NULL; 1003 int r; 1004 *str = NULL; 1005 if((r = config_get_option_list(cfg, opt, &list)) != 0) 1006 return r; 1007 *str = config_collate_cat(list); 1008 config_delstrlist(list); 1009 if(!*str) return 2; 1010 return 0; 1011 } 1012 1013 char* 1014 config_collate_cat(struct config_strlist* list) 1015 { 1016 size_t total = 0, left; 1017 struct config_strlist* s; 1018 char *r, *w; 1019 if(!list) /* no elements */ 1020 return strdup(""); 1021 if(list->next == NULL) /* one element , no newline at end. */ 1022 return strdup(list->str); 1023 /* count total length */ 1024 for(s=list; s; s=s->next) 1025 total += strlen(s->str) + 1; /* len + newline */ 1026 left = total+1; /* one extra for nul at end */ 1027 r = malloc(left); 1028 if(!r) 1029 return NULL; 1030 w = r; 1031 for(s=list; s; s=s->next) { 1032 size_t this = strlen(s->str); 1033 if(this+2 > left) { /* sanity check */ 1034 free(r); 1035 return NULL; 1036 } 1037 snprintf(w, left, "%s\n", s->str); 1038 this = strlen(w); 1039 w += this; 1040 left -= this; 1041 } 1042 return r; 1043 } 1044 1045 /** compare and print decimal option */ 1046 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \ 1047 {snprintf(buf, len, "%d", (int)cfg->var); \ 1048 func(buf, arg);} 1049 /** compare and print unsigned option */ 1050 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \ 1051 {snprintf(buf, len, "%u", (unsigned)cfg->var); \ 1052 func(buf, arg);} 1053 /** compare and print yesno option */ 1054 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \ 1055 {func(cfg->var?"yes":"no", arg);} 1056 /** compare and print string option */ 1057 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \ 1058 {func(cfg->var?cfg->var:"", arg);} 1059 /** compare and print array option */ 1060 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \ 1061 {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);} 1062 /** compare and print memorysize option */ 1063 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \ 1064 if(cfg->var > 1024*1024*1024) { \ 1065 size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \ 1066 snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \ 1067 } else snprintf(buf, len, "%u", (unsigned)cfg->var); \ 1068 func(buf, arg);} 1069 /** compare and print list option */ 1070 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \ 1071 struct config_strlist* p = cfg->lst; \ 1072 for(p = cfg->lst; p; p = p->next) \ 1073 func(p->str, arg); \ 1074 } 1075 /** compare and print list option */ 1076 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \ 1077 struct config_str2list* p = cfg->lst; \ 1078 for(p = cfg->lst; p; p = p->next) { \ 1079 snprintf(buf, len, "%s %s", p->str, p->str2); \ 1080 func(buf, arg); \ 1081 } \ 1082 } 1083 /** compare and print list option */ 1084 #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \ 1085 struct config_str3list* p = cfg->lst; \ 1086 for(p = cfg->lst; p; p = p->next) { \ 1087 snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \ 1088 func(buf, arg); \ 1089 } \ 1090 } 1091 /** compare and print taglist option */ 1092 #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \ 1093 char* tmpstr = NULL; \ 1094 struct config_strbytelist *p = cfg->lst; \ 1095 for(p = cfg->lst; p; p = p->next) {\ 1096 tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \ 1097 if(tmpstr) {\ 1098 snprintf(buf, len, "%s %s", p->str, tmpstr); \ 1099 func(buf, arg); \ 1100 free(tmpstr); \ 1101 } \ 1102 } \ 1103 } 1104 1105 int 1106 config_get_option(struct config_file* cfg, const char* opt, 1107 void (*func)(char*,void*), void* arg) 1108 { 1109 char buf[1024], nopt[64]; 1110 size_t len = sizeof(buf); 1111 if(!opt) return 0; 1112 if(opt && opt[strlen(opt)-1] == ':' && strlen(opt)<sizeof(nopt)) { 1113 memmove(nopt, opt, strlen(opt)); 1114 nopt[strlen(opt)-1] = 0; 1115 opt = nopt; 1116 } 1117 fptr_ok(fptr_whitelist_print_func(func)); 1118 O_DEC(opt, "verbosity", verbosity) 1119 else O_DEC(opt, "statistics-interval", stat_interval) 1120 else O_YNO(opt, "statistics-cumulative", stat_cumulative) 1121 else O_YNO(opt, "extended-statistics", stat_extended) 1122 else O_YNO(opt, "statistics-inhibit-zero", stat_inhibit_zero) 1123 else O_YNO(opt, "shm-enable", shm_enable) 1124 else O_DEC(opt, "shm-key", shm_key) 1125 else O_YNO(opt, "use-syslog", use_syslog) 1126 else O_STR(opt, "log-identity", log_identity) 1127 else O_YNO(opt, "log-time-ascii", log_time_ascii) 1128 else O_YNO(opt, "log-time-iso", log_time_iso) 1129 else O_DEC(opt, "num-threads", num_threads) 1130 else O_IFC(opt, "interface", num_ifs, ifs) 1131 else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs) 1132 else O_YNO(opt, "interface-automatic", if_automatic) 1133 else O_STR(opt, "interface-automatic-ports", if_automatic_ports) 1134 else O_DEC(opt, "port", port) 1135 else O_DEC(opt, "outgoing-range", outgoing_num_ports) 1136 else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp) 1137 else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp) 1138 else O_MEM(opt, "stream-wait-size", stream_wait_size) 1139 else O_DEC(opt, "edns-buffer-size", edns_buffer_size) 1140 else O_DEC(opt, "msg-buffer-size", msg_buffer_size) 1141 else O_MEM(opt, "msg-cache-size", msg_cache_size) 1142 else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs) 1143 else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread) 1144 else O_UNS(opt, "jostle-timeout", jostle_time) 1145 else O_MEM(opt, "so-rcvbuf", so_rcvbuf) 1146 else O_MEM(opt, "so-sndbuf", so_sndbuf) 1147 else O_YNO(opt, "so-reuseport", so_reuseport) 1148 else O_YNO(opt, "ip-transparent", ip_transparent) 1149 else O_YNO(opt, "ip-freebind", ip_freebind) 1150 else O_DEC(opt, "ip-dscp", ip_dscp) 1151 else O_MEM(opt, "rrset-cache-size", rrset_cache_size) 1152 else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs) 1153 else O_YNO(opt, "prefetch-key", prefetch_key) 1154 else O_YNO(opt, "prefetch", prefetch) 1155 else O_YNO(opt, "deny-any", deny_any) 1156 else O_DEC(opt, "cache-max-ttl", max_ttl) 1157 else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl) 1158 else O_DEC(opt, "cache-min-negative-ttl", min_negative_ttl) 1159 else O_DEC(opt, "cache-min-ttl", min_ttl) 1160 else O_DEC(opt, "infra-host-ttl", host_ttl) 1161 else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs) 1162 else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt) 1163 else O_UNS(opt, "infra-cache-max-rtt", infra_cache_max_rtt) 1164 else O_YNO(opt, "infra-keep-probing", infra_keep_probing) 1165 else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts) 1166 else O_UNS(opt, "delay-close", delay_close) 1167 else O_YNO(opt, "udp-connect", udp_connect) 1168 else O_YNO(opt, "do-ip4", do_ip4) 1169 else O_YNO(opt, "do-ip6", do_ip6) 1170 else O_YNO(opt, "do-udp", do_udp) 1171 else O_YNO(opt, "do-tcp", do_tcp) 1172 else O_YNO(opt, "prefer-ip4", prefer_ip4) 1173 else O_YNO(opt, "prefer-ip6", prefer_ip6) 1174 else O_YNO(opt, "tcp-upstream", tcp_upstream) 1175 else O_YNO(opt, "udp-upstream-without-downstream", udp_upstream_without_downstream) 1176 else O_DEC(opt, "tcp-mss", tcp_mss) 1177 else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss) 1178 else O_DEC(opt, "tcp-auth-query-timeout", tcp_auth_query_timeout) 1179 else O_DEC(opt, "tcp-idle-timeout", tcp_idle_timeout) 1180 else O_DEC(opt, "max-reuse-tcp-queries", max_reuse_tcp_queries) 1181 else O_DEC(opt, "tcp-reuse-timeout", tcp_reuse_timeout) 1182 else O_YNO(opt, "edns-tcp-keepalive", do_tcp_keepalive) 1183 else O_DEC(opt, "edns-tcp-keepalive-timeout", tcp_keepalive_timeout) 1184 else O_DEC(opt, "sock-queue-timeout", sock_queue_timeout) 1185 else O_YNO(opt, "ssl-upstream", ssl_upstream) 1186 else O_YNO(opt, "tls-upstream", ssl_upstream) 1187 else O_STR(opt, "ssl-service-key", ssl_service_key) 1188 else O_STR(opt, "tls-service-key", ssl_service_key) 1189 else O_STR(opt, "ssl-service-pem", ssl_service_pem) 1190 else O_STR(opt, "tls-service-pem", ssl_service_pem) 1191 else O_DEC(opt, "ssl-port", ssl_port) 1192 else O_DEC(opt, "tls-port", ssl_port) 1193 else O_STR(opt, "ssl-cert-bundle", tls_cert_bundle) 1194 else O_STR(opt, "tls-cert-bundle", tls_cert_bundle) 1195 else O_YNO(opt, "tls-win-cert", tls_win_cert) 1196 else O_YNO(opt, "tls-system-cert", tls_win_cert) 1197 else O_LST(opt, "additional-ssl-port", tls_additional_port) 1198 else O_LST(opt, "additional-tls-port", tls_additional_port) 1199 else O_LST(opt, "tls-additional-ports", tls_additional_port) 1200 else O_LST(opt, "tls-additional-port", tls_additional_port) 1201 else O_LST(opt, "tls-session-ticket-keys", tls_session_ticket_keys.first) 1202 else O_STR(opt, "tls-ciphers", tls_ciphers) 1203 else O_STR(opt, "tls-ciphersuites", tls_ciphersuites) 1204 else O_YNO(opt, "tls-use-sni", tls_use_sni) 1205 else O_STR(opt, "tls-protocols", tls_protocols) 1206 else O_DEC(opt, "https-port", https_port) 1207 else O_STR(opt, "http-endpoint", http_endpoint) 1208 else O_UNS(opt, "http-max-streams", http_max_streams) 1209 else O_MEM(opt, "http-query-buffer-size", http_query_buffer_size) 1210 else O_MEM(opt, "http-response-buffer-size", http_response_buffer_size) 1211 else O_YNO(opt, "http-nodelay", http_nodelay) 1212 else O_YNO(opt, "http-notls-downstream", http_notls_downstream) 1213 else O_DEC(opt, "quic-port", quic_port) 1214 else O_MEM(opt, "quic-size", quic_size) 1215 else O_YNO(opt, "use-systemd", use_systemd) 1216 else O_YNO(opt, "do-daemonize", do_daemonize) 1217 else O_STR(opt, "chroot", chrootdir) 1218 else O_STR(opt, "username", username) 1219 else O_STR(opt, "directory", directory) 1220 else O_STR(opt, "logfile", logfile) 1221 else O_YNO(opt, "log-queries", log_queries) 1222 else O_YNO(opt, "log-replies", log_replies) 1223 else O_YNO(opt, "log-tag-queryreply", log_tag_queryreply) 1224 else O_YNO(opt, "log-local-actions", log_local_actions) 1225 else O_YNO(opt, "log-servfail", log_servfail) 1226 else O_YNO(opt, "log-destaddr", log_destaddr) 1227 else O_YNO(opt, "log-thread-id", log_thread_id) 1228 else O_STR(opt, "pidfile", pidfile) 1229 else O_YNO(opt, "hide-identity", hide_identity) 1230 else O_YNO(opt, "hide-version", hide_version) 1231 else O_YNO(opt, "hide-trustanchor", hide_trustanchor) 1232 else O_YNO(opt, "hide-http-user-agent", hide_http_user_agent) 1233 else O_STR(opt, "identity", identity) 1234 else O_STR(opt, "version", version) 1235 else O_STR(opt, "http-user-agent", http_user_agent) 1236 else O_STR(opt, "nsid", nsid_cfg_str) 1237 else O_STR(opt, "target-fetch-policy", target_fetch_policy) 1238 else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize) 1239 else O_YNO(opt, "harden-large-queries", harden_large_queries) 1240 else O_YNO(opt, "harden-glue", harden_glue) 1241 else O_YNO(opt, "harden-unverified-glue", harden_unverified_glue) 1242 else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped) 1243 else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain) 1244 else O_YNO(opt, "harden-referral-path", harden_referral_path) 1245 else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade) 1246 else O_YNO(opt, "harden-unknown-additional", harden_unknown_additional) 1247 else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id) 1248 else O_LST(opt, "caps-whitelist", caps_whitelist) 1249 else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold) 1250 else O_YNO(opt, "do-not-query-localhost", donotquery_localhost) 1251 else O_STR(opt, "module-config", module_conf) 1252 else O_DEC(opt, "val-bogus-ttl", bogus_ttl) 1253 else O_YNO(opt, "val-clean-additional", val_clean_additional) 1254 else O_DEC(opt, "val-log-level", val_log_level) 1255 else O_YNO(opt, "val-permissive-mode", val_permissive_mode) 1256 else O_YNO(opt, "aggressive-nsec", aggressive_nsec) 1257 else O_YNO(opt, "ignore-cd-flag", ignore_cd) 1258 else O_YNO(opt, "disable-edns-do", disable_edns_do) 1259 else O_YNO(opt, "serve-expired", serve_expired) 1260 else O_DEC(opt, "serve-expired-ttl", serve_expired_ttl) 1261 else O_YNO(opt, "serve-expired-ttl-reset", serve_expired_ttl_reset) 1262 else O_DEC(opt, "serve-expired-reply-ttl", serve_expired_reply_ttl) 1263 else O_DEC(opt, "serve-expired-client-timeout", serve_expired_client_timeout) 1264 else O_YNO(opt, "ede", ede) 1265 else O_YNO(opt, "ede-serve-expired", ede_serve_expired) 1266 else O_YNO(opt, "dns-error-reporting", dns_error_reporting) 1267 else O_DEC(opt, "iter-scrub-ns", iter_scrub_ns) 1268 else O_DEC(opt, "iter-scrub-cname", iter_scrub_cname) 1269 else O_DEC(opt, "iter-scrub-rrsig", iter_scrub_rrsig) 1270 else O_YNO(opt, "iter-scrub-promiscuous", iter_scrub_promiscuous) 1271 else O_DEC(opt, "max-global-quota", max_global_quota) 1272 else O_DEC(opt, "val-validation-attempts", val_validation_attempts) 1273 else O_DEC(opt, "val-hash-attempts", val_hash_attempts) 1274 else O_YNO(opt, "serve-original-ttl", serve_original_ttl) 1275 else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations) 1276 else O_YNO(opt, "zonemd-permissive-mode", zonemd_permissive_mode) 1277 else O_UNS(opt, "add-holddown", add_holddown) 1278 else O_UNS(opt, "del-holddown", del_holddown) 1279 else O_UNS(opt, "keep-missing", keep_missing) 1280 else O_YNO(opt, "permit-small-holddown", permit_small_holddown) 1281 else O_MEM(opt, "key-cache-size", key_cache_size) 1282 else O_DEC(opt, "key-cache-slabs", key_cache_slabs) 1283 else O_MEM(opt, "neg-cache-size", neg_cache_size) 1284 else O_YNO(opt, "control-enable", remote_control_enable) 1285 else O_DEC(opt, "control-port", control_port) 1286 else O_STR(opt, "server-key-file", server_key_file) 1287 else O_STR(opt, "server-cert-file", server_cert_file) 1288 else O_STR(opt, "control-key-file", control_key_file) 1289 else O_STR(opt, "control-cert-file", control_cert_file) 1290 else O_LST(opt, "root-hints", root_hints) 1291 else O_LS2(opt, "access-control", acls) 1292 else O_LS2(opt, "tcp-connection-limit", tcp_connection_limits) 1293 else O_LST(opt, "do-not-query-address", donotqueryaddrs) 1294 else O_LST(opt, "private-address", private_address) 1295 else O_LST(opt, "private-domain", private_domain) 1296 else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list) 1297 else O_LST(opt, "trust-anchor-file", trust_anchor_file_list) 1298 else O_LST(opt, "trust-anchor", trust_anchor_list) 1299 else O_LST(opt, "trusted-keys-file", trusted_keys_file_list) 1300 else O_YNO(opt, "trust-anchor-signaling", trust_anchor_signaling) 1301 else O_YNO(opt, "root-key-sentinel", root_key_sentinel) 1302 else O_LST(opt, "control-interface", control_ifs.first) 1303 else O_LST(opt, "domain-insecure", domain_insecure) 1304 else O_UNS(opt, "val-override-date", val_date_override) 1305 else O_YNO(opt, "minimal-responses", minimal_responses) 1306 else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin) 1307 else O_DEC(opt, "unknown-server-time-limit", unknown_server_time_limit) 1308 else O_DEC(opt, "discard-timeout", discard_timeout) 1309 else O_DEC(opt, "wait-limit", wait_limit) 1310 else O_DEC(opt, "wait-limit-cookie", wait_limit_cookie) 1311 else O_LS2(opt, "wait-limit-netblock", wait_limit_netblock) 1312 else O_LS2(opt, "wait-limit-cookie-netblock", wait_limit_cookie_netblock) 1313 #ifdef CLIENT_SUBNET 1314 else O_LST(opt, "send-client-subnet", client_subnet) 1315 else O_LST(opt, "client-subnet-zone", client_subnet_zone) 1316 else O_DEC(opt, "max-client-subnet-ipv4", max_client_subnet_ipv4) 1317 else O_DEC(opt, "max-client-subnet-ipv6", max_client_subnet_ipv6) 1318 else O_DEC(opt, "min-client-subnet-ipv4", min_client_subnet_ipv4) 1319 else O_DEC(opt, "min-client-subnet-ipv6", min_client_subnet_ipv6) 1320 else O_DEC(opt, "max-ecs-tree-size-ipv4", max_ecs_tree_size_ipv4) 1321 else O_DEC(opt, "max-ecs-tree-size-ipv6", max_ecs_tree_size_ipv6) 1322 else O_YNO(opt, "client-subnet-always-forward:", 1323 client_subnet_always_forward) 1324 #endif 1325 #ifdef USE_DNSTAP 1326 else O_YNO(opt, "dnstap-enable", dnstap) 1327 else O_YNO(opt, "dnstap-bidirectional", dnstap_bidirectional) 1328 else O_STR(opt, "dnstap-socket-path", dnstap_socket_path) 1329 else O_STR(opt, "dnstap-ip", dnstap_ip) 1330 else O_YNO(opt, "dnstap-tls", dnstap_tls) 1331 else O_STR(opt, "dnstap-tls-server-name", dnstap_tls_server_name) 1332 else O_STR(opt, "dnstap-tls-cert-bundle", dnstap_tls_cert_bundle) 1333 else O_STR(opt, "dnstap-tls-client-key-file", 1334 dnstap_tls_client_key_file) 1335 else O_STR(opt, "dnstap-tls-client-cert-file", 1336 dnstap_tls_client_cert_file) 1337 else O_YNO(opt, "dnstap-send-identity", dnstap_send_identity) 1338 else O_YNO(opt, "dnstap-send-version", dnstap_send_version) 1339 else O_STR(opt, "dnstap-identity", dnstap_identity) 1340 else O_STR(opt, "dnstap-version", dnstap_version) 1341 else O_UNS(opt, "dnstap-sample-rate", dnstap_sample_rate) 1342 else O_YNO(opt, "dnstap-log-resolver-query-messages", 1343 dnstap_log_resolver_query_messages) 1344 else O_YNO(opt, "dnstap-log-resolver-response-messages", 1345 dnstap_log_resolver_response_messages) 1346 else O_YNO(opt, "dnstap-log-client-query-messages", 1347 dnstap_log_client_query_messages) 1348 else O_YNO(opt, "dnstap-log-client-response-messages", 1349 dnstap_log_client_response_messages) 1350 else O_YNO(opt, "dnstap-log-forwarder-query-messages", 1351 dnstap_log_forwarder_query_messages) 1352 else O_YNO(opt, "dnstap-log-forwarder-response-messages", 1353 dnstap_log_forwarder_response_messages) 1354 #endif 1355 #ifdef USE_DNSCRYPT 1356 else O_YNO(opt, "dnscrypt-enable", dnscrypt) 1357 else O_DEC(opt, "dnscrypt-port", dnscrypt_port) 1358 else O_STR(opt, "dnscrypt-provider", dnscrypt_provider) 1359 else O_LST(opt, "dnscrypt-provider-cert", dnscrypt_provider_cert) 1360 else O_LST(opt, "dnscrypt-provider-cert-rotated", dnscrypt_provider_cert_rotated) 1361 else O_LST(opt, "dnscrypt-secret-key", dnscrypt_secret_key) 1362 else O_MEM(opt, "dnscrypt-shared-secret-cache-size", 1363 dnscrypt_shared_secret_cache_size) 1364 else O_DEC(opt, "dnscrypt-shared-secret-cache-slabs", 1365 dnscrypt_shared_secret_cache_slabs) 1366 else O_MEM(opt, "dnscrypt-nonce-cache-size", 1367 dnscrypt_nonce_cache_size) 1368 else O_DEC(opt, "dnscrypt-nonce-cache-slabs", 1369 dnscrypt_nonce_cache_slabs) 1370 #endif 1371 else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones) 1372 else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones) 1373 else O_DEC(opt, "max-udp-size", max_udp_size) 1374 else O_LST(opt, "python-script", python_script) 1375 else O_LST(opt, "dynlib-file", dynlib_file) 1376 else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check) 1377 else O_DEC(opt, "ip-ratelimit-cookie", ip_ratelimit_cookie) 1378 else O_DEC(opt, "ip-ratelimit", ip_ratelimit) 1379 else O_DEC(opt, "ratelimit", ratelimit) 1380 else O_MEM(opt, "ip-ratelimit-size", ip_ratelimit_size) 1381 else O_MEM(opt, "ratelimit-size", ratelimit_size) 1382 else O_DEC(opt, "ip-ratelimit-slabs", ip_ratelimit_slabs) 1383 else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs) 1384 else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain) 1385 else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain) 1386 else O_DEC(opt, "ip-ratelimit-factor", ip_ratelimit_factor) 1387 else O_DEC(opt, "ratelimit-factor", ratelimit_factor) 1388 else O_YNO(opt, "ip-ratelimit-backoff", ip_ratelimit_backoff) 1389 else O_YNO(opt, "ratelimit-backoff", ratelimit_backoff) 1390 else O_UNS(opt, "outbound-msg-retry", outbound_msg_retry) 1391 else O_UNS(opt, "max-sent-count", max_sent_count) 1392 else O_UNS(opt, "max-query-restarts", max_query_restarts) 1393 else O_DEC(opt, "fast-server-num", fast_server_num) 1394 else O_DEC(opt, "fast-server-permil", fast_server_permil) 1395 else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min) 1396 else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max) 1397 else O_DEC(opt, "val-max-restart", val_max_restart) 1398 else O_YNO(opt, "qname-minimisation", qname_minimisation) 1399 else O_YNO(opt, "qname-minimisation-strict", qname_minimisation_strict) 1400 else O_IFC(opt, "define-tag", num_tags, tagname) 1401 else O_LTG(opt, "local-zone-tag", local_zone_tags) 1402 else O_LTG(opt, "access-control-tag", acl_tags) 1403 else O_LTG(opt, "response-ip-tag", respip_tags) 1404 else O_LS3(opt, "local-zone-override", local_zone_overrides) 1405 else O_LS3(opt, "access-control-tag-action", acl_tag_actions) 1406 else O_LS3(opt, "access-control-tag-data", acl_tag_datas) 1407 else O_LS2(opt, "access-control-view", acl_view) 1408 else O_LS2(opt, "interface-action", interface_actions) 1409 else O_LTG(opt, "interface-tag", interface_tags) 1410 else O_LS3(opt, "interface-tag-action", interface_tag_actions) 1411 else O_LS3(opt, "interface-tag-data", interface_tag_datas) 1412 else O_LS2(opt, "interface-view", interface_view) 1413 else O_YNO(opt, "pad-responses", pad_responses) 1414 else O_DEC(opt, "pad-responses-block-size", pad_responses_block_size) 1415 else O_YNO(opt, "pad-queries", pad_queries) 1416 else O_DEC(opt, "pad-queries-block-size", pad_queries_block_size) 1417 else O_LS2(opt, "edns-client-strings", edns_client_strings) 1418 else O_LST(opt, "proxy-protocol-port", proxy_protocol_port) 1419 #ifdef USE_IPSECMOD 1420 else O_YNO(opt, "ipsecmod-enabled", ipsecmod_enabled) 1421 else O_YNO(opt, "ipsecmod-ignore-bogus", ipsecmod_ignore_bogus) 1422 else O_STR(opt, "ipsecmod-hook", ipsecmod_hook) 1423 else O_DEC(opt, "ipsecmod-max-ttl", ipsecmod_max_ttl) 1424 else O_LST(opt, "ipsecmod-whitelist", ipsecmod_whitelist) 1425 else O_YNO(opt, "ipsecmod-strict", ipsecmod_strict) 1426 #endif 1427 else O_YNO(opt, "answer-cookie", do_answer_cookie) 1428 else O_STR(opt, "cookie-secret-file", cookie_secret_file) 1429 #ifdef USE_CACHEDB 1430 else O_STR(opt, "backend", cachedb_backend) 1431 else O_STR(opt, "secret-seed", cachedb_secret) 1432 else O_YNO(opt, "cachedb-no-store", cachedb_no_store) 1433 else O_YNO(opt, "cachedb-check-when-serve-expired", cachedb_check_when_serve_expired) 1434 #ifdef USE_REDIS 1435 else O_STR(opt, "redis-server-host", redis_server_host) 1436 else O_STR(opt, "redis-replica-server-host", redis_replica_server_host) 1437 else O_DEC(opt, "redis-server-port", redis_server_port) 1438 else O_DEC(opt, "redis-replica-server-port", redis_replica_server_port) 1439 else O_STR(opt, "redis-server-path", redis_server_path) 1440 else O_STR(opt, "redis-replica-server-path", redis_replica_server_path) 1441 else O_STR(opt, "redis-server-password", redis_server_password) 1442 else O_STR(opt, "redis-replica-server-password", redis_replica_server_password) 1443 else O_DEC(opt, "redis-timeout", redis_timeout) 1444 else O_DEC(opt, "redis-replica-timeout", redis_replica_timeout) 1445 else O_DEC(opt, "redis-command-timeout", redis_command_timeout) 1446 else O_DEC(opt, "redis-replica-command-timeout", redis_replica_command_timeout) 1447 else O_DEC(opt, "redis-connect-timeout", redis_connect_timeout) 1448 else O_DEC(opt, "redis-replica-connect-timeout", redis_replica_connect_timeout) 1449 else O_YNO(opt, "redis-expire-records", redis_expire_records) 1450 else O_DEC(opt, "redis-logical-db", redis_logical_db) 1451 else O_DEC(opt, "redis-replica-logical-db", redis_replica_logical_db) 1452 #endif /* USE_REDIS */ 1453 #endif /* USE_CACHEDB */ 1454 #ifdef USE_IPSET 1455 else O_STR(opt, "name-v4", ipset_name_v4) 1456 else O_STR(opt, "name-v6", ipset_name_v6) 1457 #endif 1458 /* not here: 1459 * outgoing-permit, outgoing-avoid - have list of ports 1460 * local-zone - zones and nodefault variables 1461 * local-data - see below 1462 * local-data-ptr - converted to local-data entries 1463 * stub-zone, name, stub-addr, stub-host, stub-prime 1464 * forward-zone, name, forward-addr, forward-host 1465 */ 1466 else return 0; 1467 return 1; 1468 } 1469 1470 /** initialize the global cfg_parser object */ 1471 static void 1472 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot) 1473 { 1474 static struct config_parser_state st; 1475 cfg_parser = &st; 1476 cfg_parser->filename = filename; 1477 cfg_parser->line = 1; 1478 cfg_parser->errors = 0; 1479 cfg_parser->cfg = cfg; 1480 cfg_parser->chroot = chroot; 1481 cfg_parser->started_toplevel = 0; 1482 init_cfg_parse(); 1483 } 1484 1485 void 1486 config_auto_slab_values(struct config_file* cfg) 1487 { 1488 #define SET_AUTO_SLAB(var, name, val) \ 1489 do { \ 1490 if(cfg->var == 0) { \ 1491 cfg->var = val; \ 1492 verbose(VERB_QUERY, "setting "name": %lu", (unsigned long)val); \ 1493 } \ 1494 } while(0); 1495 #ifdef THREADS_DISABLED 1496 size_t pow_2_threads = 1; 1497 #else 1498 size_t pow_2_threads = 4; /* pow2 start */ 1499 while (pow_2_threads < (size_t)(cfg->num_threads?cfg->num_threads:1) && 1500 /* 1/3 of the distance to the next pow2 value stays with the 1501 * lower value */ 1502 (size_t)cfg->num_threads > pow_2_threads + (pow_2_threads - 1)/3) { 1503 pow_2_threads <<= 1; 1504 } 1505 log_assert((pow_2_threads & (pow_2_threads - 1)) == 0); /* powerof2? */ 1506 #endif /* THREADS_DISABLED */ 1507 1508 SET_AUTO_SLAB(msg_cache_slabs, "msg-cache-slabs", pow_2_threads); 1509 SET_AUTO_SLAB(rrset_cache_slabs, "rrset-cache-slabs", pow_2_threads); 1510 SET_AUTO_SLAB(infra_cache_slabs, "infra-cache-slabs", pow_2_threads); 1511 SET_AUTO_SLAB(key_cache_slabs, "key-cache-slabs", pow_2_threads); 1512 SET_AUTO_SLAB(ip_ratelimit_slabs, "ip-ratelimit-slabs", pow_2_threads); 1513 SET_AUTO_SLAB(ratelimit_slabs, "ratelimit-slabs", pow_2_threads); 1514 SET_AUTO_SLAB(dnscrypt_shared_secret_cache_slabs, 1515 "dnscrypt-shared-secret-cache-slabs", pow_2_threads); 1516 SET_AUTO_SLAB(dnscrypt_nonce_cache_slabs, 1517 "dnscrypt-nonce-cache-slabs", pow_2_threads); 1518 } 1519 1520 int 1521 config_read(struct config_file* cfg, const char* filename, const char* chroot) 1522 { 1523 FILE *in; 1524 char *fname = (char*)filename; 1525 #ifdef HAVE_GLOB 1526 glob_t g; 1527 size_t i; 1528 int r, flags; 1529 #endif 1530 if(!fname) 1531 return 1; 1532 1533 /* check for wildcards */ 1534 #ifdef HAVE_GLOB 1535 if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') && 1536 !strchr(fname, '{') && !strchr(fname, '~'))) { 1537 verbose(VERB_QUERY, "wildcard found, processing %s", fname); 1538 flags = 0 1539 #ifdef GLOB_ERR 1540 | GLOB_ERR 1541 #endif 1542 #ifdef GLOB_NOSORT 1543 | GLOB_NOSORT 1544 #endif 1545 #ifdef GLOB_BRACE 1546 | GLOB_BRACE 1547 #endif 1548 #ifdef GLOB_TILDE 1549 | GLOB_TILDE 1550 #endif 1551 ; 1552 memset(&g, 0, sizeof(g)); 1553 r = glob(fname, flags, NULL, &g); 1554 if(r) { 1555 /* some error */ 1556 globfree(&g); 1557 if(r == GLOB_NOMATCH) { 1558 verbose(VERB_QUERY, "include: " 1559 "no matches for %s", fname); 1560 return 1; 1561 } else if(r == GLOB_NOSPACE) { 1562 log_err("include: %s: " 1563 "fnametern out of memory", fname); 1564 } else if(r == GLOB_ABORTED) { 1565 log_err("wildcard include: %s: expansion " 1566 "aborted (%s)", fname, strerror(errno)); 1567 } else { 1568 log_err("wildcard include: %s: expansion " 1569 "failed (%s)", fname, strerror(errno)); 1570 } 1571 /* ignore globs that yield no files */ 1572 return 1; 1573 } 1574 /* process files found, if any */ 1575 for(i=0; i<(size_t)g.gl_pathc; i++) { 1576 if(!config_read(cfg, g.gl_pathv[i], chroot)) { 1577 log_err("error reading wildcard " 1578 "include: %s", g.gl_pathv[i]); 1579 globfree(&g); 1580 return 0; 1581 } 1582 } 1583 globfree(&g); 1584 config_auto_slab_values(cfg); 1585 if(!init_cookie_secret(cfg)) 1586 return 0; 1587 return 1; 1588 } 1589 #endif /* HAVE_GLOB */ 1590 1591 in = fopen(fname, "r"); 1592 if(!in) { 1593 log_err("Could not open %s: %s", fname, strerror(errno)); 1594 return 0; 1595 } 1596 create_cfg_parser(cfg, fname, chroot); 1597 ub_c_in = in; 1598 ub_c_parse(); 1599 fclose(in); 1600 1601 if(!cfg->dnscrypt) cfg->dnscrypt_port = 0; 1602 1603 if(cfg_parser->errors != 0) { 1604 fprintf(stderr, "read %s failed: %d errors in configuration file\n", 1605 fname, cfg_parser->errors); 1606 errno=EINVAL; 1607 return 0; 1608 } 1609 1610 config_auto_slab_values(cfg); 1611 if(!init_cookie_secret(cfg)) 1612 return 0; 1613 return 1; 1614 } 1615 1616 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm) 1617 { 1618 struct config_stub* p = *(*pp); 1619 while(p) { 1620 if(strcmp(p->name, nm) == 0) 1621 return p; 1622 (*pp) = &p->next; 1623 p = p->next; 1624 } 1625 return NULL; 1626 } 1627 1628 void 1629 config_delstrlist(struct config_strlist* p) 1630 { 1631 struct config_strlist *np; 1632 while(p) { 1633 np = p->next; 1634 free(p->str); 1635 free(p); 1636 p = np; 1637 } 1638 } 1639 1640 void 1641 config_deldblstrlist(struct config_str2list* p) 1642 { 1643 struct config_str2list *np; 1644 while(p) { 1645 np = p->next; 1646 free(p->str); 1647 free(p->str2); 1648 free(p); 1649 p = np; 1650 } 1651 } 1652 1653 void 1654 config_deltrplstrlist(struct config_str3list* p) 1655 { 1656 struct config_str3list *np; 1657 while(p) { 1658 np = p->next; 1659 free(p->str); 1660 free(p->str2); 1661 free(p->str3); 1662 free(p); 1663 p = np; 1664 } 1665 } 1666 1667 void 1668 config_delauth(struct config_auth* p) 1669 { 1670 if(!p) return; 1671 free(p->name); 1672 config_delstrlist(p->masters); 1673 config_delstrlist(p->urls); 1674 config_delstrlist(p->allow_notify); 1675 free(p->zonefile); 1676 free(p->rpz_taglist); 1677 free(p->rpz_action_override); 1678 free(p->rpz_cname); 1679 free(p->rpz_log_name); 1680 free(p); 1681 } 1682 1683 void 1684 config_delauths(struct config_auth* p) 1685 { 1686 struct config_auth* np; 1687 while(p) { 1688 np = p->next; 1689 config_delauth(p); 1690 p = np; 1691 } 1692 } 1693 1694 void 1695 config_delstub(struct config_stub* p) 1696 { 1697 if(!p) return; 1698 free(p->name); 1699 config_delstrlist(p->hosts); 1700 config_delstrlist(p->addrs); 1701 free(p); 1702 } 1703 1704 void 1705 config_delstubs(struct config_stub* p) 1706 { 1707 struct config_stub* np; 1708 while(p) { 1709 np = p->next; 1710 config_delstub(p); 1711 p = np; 1712 } 1713 } 1714 1715 void 1716 config_delview(struct config_view* p) 1717 { 1718 if(!p) return; 1719 free(p->name); 1720 config_deldblstrlist(p->local_zones); 1721 config_delstrlist(p->local_zones_nodefault); 1722 #ifdef USE_IPSET 1723 config_delstrlist(p->local_zones_ipset); 1724 #endif 1725 config_delstrlist(p->local_data); 1726 free(p); 1727 } 1728 1729 void 1730 config_delviews(struct config_view* p) 1731 { 1732 struct config_view* np; 1733 while(p) { 1734 np = p->next; 1735 config_delview(p); 1736 p = np; 1737 } 1738 } 1739 1740 void 1741 config_del_strarray(char** array, int num) 1742 { 1743 int i; 1744 if(!array) 1745 return; 1746 for(i=0; i<num; i++) { 1747 free(array[i]); 1748 } 1749 free(array); 1750 } 1751 1752 void 1753 config_del_strbytelist(struct config_strbytelist* p) 1754 { 1755 struct config_strbytelist* np; 1756 while(p) { 1757 np = p->next; 1758 free(p->str); 1759 free(p->str2); 1760 free(p); 1761 p = np; 1762 } 1763 } 1764 1765 void 1766 config_delete(struct config_file* cfg) 1767 { 1768 if(!cfg) return; 1769 free(cfg->username); 1770 free(cfg->chrootdir); 1771 free(cfg->directory); 1772 free(cfg->logfile); 1773 free(cfg->pidfile); 1774 free(cfg->if_automatic_ports); 1775 free(cfg->target_fetch_policy); 1776 free(cfg->ssl_service_key); 1777 free(cfg->ssl_service_pem); 1778 free(cfg->tls_cert_bundle); 1779 config_delstrlist(cfg->tls_additional_port); 1780 config_delstrlist(cfg->tls_session_ticket_keys.first); 1781 free(cfg->tls_ciphers); 1782 free(cfg->tls_ciphersuites); 1783 free(cfg->tls_protocols); 1784 free(cfg->http_endpoint); 1785 if(cfg->log_identity) { 1786 log_ident_revert_to_default(); 1787 free(cfg->log_identity); 1788 } 1789 config_del_strarray(cfg->ifs, cfg->num_ifs); 1790 config_del_strarray(cfg->out_ifs, cfg->num_out_ifs); 1791 config_delstubs(cfg->stubs); 1792 config_delstubs(cfg->forwards); 1793 config_delauths(cfg->auths); 1794 config_delviews(cfg->views); 1795 config_delstrlist(cfg->donotqueryaddrs); 1796 config_delstrlist(cfg->root_hints); 1797 #ifdef CLIENT_SUBNET 1798 config_delstrlist(cfg->client_subnet); 1799 config_delstrlist(cfg->client_subnet_zone); 1800 #endif 1801 free(cfg->identity); 1802 free(cfg->version); 1803 free(cfg->http_user_agent); 1804 free(cfg->nsid_cfg_str); 1805 free(cfg->nsid); 1806 free(cfg->module_conf); 1807 free(cfg->outgoing_avail_ports); 1808 config_delstrlist(cfg->caps_whitelist); 1809 config_delstrlist(cfg->private_address); 1810 config_delstrlist(cfg->private_domain); 1811 config_delstrlist(cfg->auto_trust_anchor_file_list); 1812 config_delstrlist(cfg->trust_anchor_file_list); 1813 config_delstrlist(cfg->trusted_keys_file_list); 1814 config_delstrlist(cfg->trust_anchor_list); 1815 config_delstrlist(cfg->domain_insecure); 1816 config_deldblstrlist(cfg->acls); 1817 config_deldblstrlist(cfg->tcp_connection_limits); 1818 free(cfg->val_nsec3_key_iterations); 1819 config_deldblstrlist(cfg->local_zones); 1820 config_delstrlist(cfg->local_zones_nodefault); 1821 #ifdef USE_IPSET 1822 config_delstrlist(cfg->local_zones_ipset); 1823 #endif 1824 config_delstrlist(cfg->local_data); 1825 config_deltrplstrlist(cfg->local_zone_overrides); 1826 config_del_strarray(cfg->tagname, cfg->num_tags); 1827 config_del_strbytelist(cfg->local_zone_tags); 1828 config_del_strbytelist(cfg->respip_tags); 1829 config_deldblstrlist(cfg->respip_actions); 1830 config_deldblstrlist(cfg->acl_view); 1831 config_del_strbytelist(cfg->acl_tags); 1832 config_deltrplstrlist(cfg->acl_tag_actions); 1833 config_deltrplstrlist(cfg->acl_tag_datas); 1834 config_deldblstrlist(cfg->interface_actions); 1835 config_deldblstrlist(cfg->interface_view); 1836 config_del_strbytelist(cfg->interface_tags); 1837 config_deltrplstrlist(cfg->interface_tag_actions); 1838 config_deltrplstrlist(cfg->interface_tag_datas); 1839 config_delstrlist(cfg->control_ifs.first); 1840 config_deldblstrlist(cfg->wait_limit_netblock); 1841 config_deldblstrlist(cfg->wait_limit_cookie_netblock); 1842 free(cfg->server_key_file); 1843 free(cfg->server_cert_file); 1844 free(cfg->control_key_file); 1845 free(cfg->control_cert_file); 1846 free(cfg->nat64_prefix); 1847 free(cfg->dns64_prefix); 1848 config_delstrlist(cfg->dns64_ignore_aaaa); 1849 free(cfg->dnstap_socket_path); 1850 free(cfg->dnstap_ip); 1851 free(cfg->dnstap_tls_server_name); 1852 free(cfg->dnstap_tls_cert_bundle); 1853 free(cfg->dnstap_tls_client_key_file); 1854 free(cfg->dnstap_tls_client_cert_file); 1855 free(cfg->dnstap_identity); 1856 free(cfg->dnstap_version); 1857 config_deldblstrlist(cfg->ratelimit_for_domain); 1858 config_deldblstrlist(cfg->ratelimit_below_domain); 1859 config_delstrlist(cfg->python_script); 1860 config_delstrlist(cfg->dynlib_file); 1861 config_deldblstrlist(cfg->edns_client_strings); 1862 config_delstrlist(cfg->proxy_protocol_port); 1863 #ifdef USE_IPSECMOD 1864 free(cfg->ipsecmod_hook); 1865 config_delstrlist(cfg->ipsecmod_whitelist); 1866 #endif 1867 free(cfg->cookie_secret_file); 1868 #ifdef USE_CACHEDB 1869 free(cfg->cachedb_backend); 1870 free(cfg->cachedb_secret); 1871 #ifdef USE_REDIS 1872 free(cfg->redis_server_host); 1873 free(cfg->redis_replica_server_host); 1874 free(cfg->redis_server_path); 1875 free(cfg->redis_replica_server_path); 1876 free(cfg->redis_server_password); 1877 free(cfg->redis_replica_server_password); 1878 #endif /* USE_REDIS */ 1879 #endif /* USE_CACHEDB */ 1880 #ifdef USE_IPSET 1881 free(cfg->ipset_name_v4); 1882 free(cfg->ipset_name_v6); 1883 #endif 1884 free(cfg); 1885 } 1886 1887 static int 1888 init_cookie_secret(struct config_file* cfg) 1889 { 1890 struct ub_randstate* rand; 1891 size_t cookie_secret_len; 1892 uint8_t* cookie_secret; 1893 if(!cfg->do_answer_cookie) 1894 return 1; 1895 if(cfg->cookie_secret_file && cfg->cookie_secret_file[0]) 1896 return 1; 1897 if(cfg->cookie_secret_len != 0) 1898 return 1; 1899 1900 rand = ub_initstate(NULL); 1901 if(!rand) { 1902 log_err("init_cookie_secret: could not init random generator"); 1903 return 0; 1904 } 1905 cfg->cookie_secret_len = 16; 1906 cookie_secret_len = cfg->cookie_secret_len; 1907 cookie_secret = cfg->cookie_secret; 1908 while (cookie_secret_len) { 1909 *cookie_secret++ = (uint8_t)ub_random(rand); 1910 cookie_secret_len--; 1911 } 1912 ub_randfree(rand); 1913 return 1; 1914 } 1915 1916 static void 1917 init_outgoing_availports(int* a, int num) 1918 { 1919 /* generated with make iana_update */ 1920 const int iana_assigned[] = { 1921 #include "util/iana_ports.inc" 1922 -1 }; /* end marker to put behind trailing comma */ 1923 1924 int i; 1925 /* do not use <1024, that could be trouble with the system, privs */ 1926 for(i=1024; i<num; i++) { 1927 a[i] = i; 1928 } 1929 /* create empty spot at 49152 to keep ephemeral ports available 1930 * to other programs */ 1931 for(i=49152; i<49152+256; i++) 1932 a[i] = 0; 1933 /* pick out all the IANA assigned ports */ 1934 for(i=0; iana_assigned[i]!=-1; i++) { 1935 if(iana_assigned[i] < num) 1936 a[iana_assigned[i]] = 0; 1937 } 1938 } 1939 1940 static int 1941 extract_port_from_str(const char* str, int max_port) { 1942 char* endptr; 1943 long int value; 1944 if (str == NULL || *str == '\0') { 1945 log_err("str: '%s' is invalid", (str?str:"NULL")); 1946 return -1; 1947 } 1948 1949 value = strtol(str, &endptr, 10); 1950 if ((endptr == str) || (*endptr != '\0')) { 1951 log_err("cannot parse port number '%s'", str); 1952 return -1; 1953 } 1954 1955 if (errno == ERANGE) { 1956 log_err("overflow occurred when parsing '%s'", str); 1957 return -1; 1958 } 1959 1960 if (value == 0 && strcmp(str, "0") != 0) { 1961 log_err("cannot parse port number '%s'", str); 1962 return -1; 1963 } 1964 1965 if (value < 0 || value >= max_port) { 1966 log_err(" '%s' is out of bounds [0, %d)", str, max_port); 1967 return -1; 1968 } 1969 1970 return (int)value; 1971 } 1972 1973 int 1974 cfg_mark_ports(const char* str, int allow, int* avail, int num) 1975 { 1976 const char* mid = strchr(str, '-'); 1977 #ifdef DISABLE_EXPLICIT_PORT_RANDOMISATION 1978 log_warn("Explicit port randomisation disabled, ignoring " 1979 "outgoing-port-permit and outgoing-port-avoid configuration " 1980 "options"); 1981 #endif 1982 if(!mid) { 1983 int port = extract_port_from_str(str, num); 1984 if (port < 0) { 1985 log_err("Failed to parse the port number"); 1986 return 0; 1987 } 1988 if(port < num) 1989 avail[port] = (allow?port:0); 1990 } else { 1991 char buf[16]; 1992 int i, low; 1993 int high = extract_port_from_str(mid+1, num); 1994 if (high < 0) { 1995 log_err("Failed to parse the port number"); 1996 return 0; 1997 } 1998 1999 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) { 2000 log_err("cannot parse port number '%s'", str); 2001 return 0; 2002 } 2003 2004 if(mid > str) 2005 memcpy(buf, str, (size_t)(mid-str)); 2006 buf[mid-str] = 0; 2007 low = extract_port_from_str(buf, num); 2008 if (low < 0) { 2009 log_err("Failed to parse the port number"); 2010 return 0; 2011 } 2012 2013 if (low > high) { 2014 log_err("Low value is greater than high value"); 2015 return 0; 2016 } 2017 2018 for(i=low; i<=high; i++) { 2019 if(i < num) 2020 avail[i] = (allow?i:0); 2021 } 2022 } 2023 return 1; 2024 } 2025 2026 int 2027 cfg_scan_ports(int* avail, int num) 2028 { 2029 int i; 2030 int count = 0; 2031 for(i=0; i<num; i++) { 2032 if(avail[i]) 2033 count++; 2034 } 2035 return count; 2036 } 2037 2038 int cfg_condense_ports(struct config_file* cfg, int** avail) 2039 { 2040 int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536); 2041 int i, at = 0; 2042 *avail = NULL; 2043 if(num == 0) 2044 return 0; 2045 *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int)); 2046 if(!*avail) 2047 return 0; 2048 for(i=0; i<65536; i++) { 2049 if(cfg->outgoing_avail_ports[i]) 2050 (*avail)[at++] = cfg->outgoing_avail_ports[i]; 2051 } 2052 log_assert(at == num); 2053 return num; 2054 } 2055 2056 void cfg_apply_local_port_policy(struct config_file* cfg, int num) { 2057 (void)cfg; 2058 (void)num; 2059 #ifdef USE_LINUX_IP_LOCAL_PORT_RANGE 2060 { 2061 int i = 0; 2062 FILE* range_fd; 2063 if ((range_fd = fopen(LINUX_IP_LOCAL_PORT_RANGE_PATH, "r")) != NULL) { 2064 int min_port = 0; 2065 int max_port = num - 1; 2066 if (fscanf(range_fd, "%d %d", &min_port, &max_port) == 2) { 2067 for(i=0; i<min_port; i++) { 2068 cfg->outgoing_avail_ports[i] = 0; 2069 } 2070 for(i=max_port+1; i<num; i++) { 2071 cfg->outgoing_avail_ports[i] = 0; 2072 } 2073 } else { 2074 log_err("unexpected port range in %s", 2075 LINUX_IP_LOCAL_PORT_RANGE_PATH); 2076 } 2077 fclose(range_fd); 2078 } else { 2079 log_err("failed to read from file: %s (%s)", 2080 LINUX_IP_LOCAL_PORT_RANGE_PATH, 2081 strerror(errno)); 2082 } 2083 } 2084 #endif 2085 } 2086 2087 /** print error with file and line number */ 2088 static void ub_c_error_va_list(const char *fmt, va_list args) 2089 { 2090 cfg_parser->errors++; 2091 fprintf(stderr, "%s:%d: error: ", cfg_parser->filename, 2092 cfg_parser->line); 2093 vfprintf(stderr, fmt, args); 2094 fprintf(stderr, "\n"); 2095 } 2096 2097 /** print error with file and line number */ 2098 void ub_c_error_msg(const char* fmt, ...) 2099 { 2100 va_list args; 2101 va_start(args, fmt); 2102 ub_c_error_va_list(fmt, args); 2103 va_end(args); 2104 } 2105 2106 void ub_c_error(const char *str) 2107 { 2108 cfg_parser->errors++; 2109 if(strcmp(str, "syntax error")==0 && cfg_parser->started_toplevel ==0) 2110 str = "syntax error, is there no section start after an " 2111 "include-toplevel directive perhaps."; 2112 fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename, 2113 cfg_parser->line, str); 2114 } 2115 2116 int ub_c_wrap(void) 2117 { 2118 return 1; 2119 } 2120 2121 int cfg_strlist_append(struct config_strlist_head* list, char* item) 2122 { 2123 struct config_strlist *s; 2124 if(!item || !list) { 2125 free(item); 2126 return 0; 2127 } 2128 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 2129 if(!s) { 2130 free(item); 2131 return 0; 2132 } 2133 s->str = item; 2134 s->next = NULL; 2135 if(list->last) 2136 list->last->next = s; 2137 else 2138 list->first = s; 2139 list->last = s; 2140 return 1; 2141 } 2142 2143 int 2144 cfg_region_strlist_insert(struct regional* region, 2145 struct config_strlist** head, char* item) 2146 { 2147 struct config_strlist *s; 2148 if(!item || !head) 2149 return 0; 2150 s = (struct config_strlist*)regional_alloc_zero(region, 2151 sizeof(struct config_strlist)); 2152 if(!s) 2153 return 0; 2154 s->str = item; 2155 s->next = *head; 2156 *head = s; 2157 return 1; 2158 } 2159 2160 struct config_strlist* 2161 cfg_strlist_find(struct config_strlist* head, const char *item) 2162 { 2163 struct config_strlist *s = head; 2164 if(!head){ 2165 return NULL; 2166 } 2167 while(s) { 2168 if(strcmp(s->str, item) == 0) { 2169 return s; 2170 } 2171 s = s->next; 2172 } 2173 return NULL; 2174 } 2175 2176 int 2177 cfg_strlist_insert(struct config_strlist** head, char* item) 2178 { 2179 struct config_strlist *s; 2180 if(!item || !head) { 2181 free(item); 2182 return 0; 2183 } 2184 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 2185 if(!s) { 2186 free(item); 2187 return 0; 2188 } 2189 s->str = item; 2190 s->next = *head; 2191 *head = s; 2192 return 1; 2193 } 2194 2195 int 2196 cfg_strlist_append_ex(struct config_strlist** head, char* item) 2197 { 2198 struct config_strlist *s; 2199 if(!item || !head) 2200 return 0; 2201 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 2202 if(!s) 2203 return 0; 2204 s->str = item; 2205 s->next = NULL; 2206 2207 if (*head==NULL) { 2208 *head = s; 2209 } else { 2210 struct config_strlist *last = *head; 2211 while (last->next!=NULL) { 2212 last = last->next; 2213 } 2214 last->next = s; 2215 } 2216 2217 return 1; 2218 } 2219 2220 int 2221 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2) 2222 { 2223 struct config_str2list *s; 2224 if(!item || !i2 || !head) { 2225 free(item); 2226 free(i2); 2227 return 0; 2228 } 2229 s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list)); 2230 if(!s) { 2231 free(item); 2232 free(i2); 2233 return 0; 2234 } 2235 s->str = item; 2236 s->str2 = i2; 2237 s->next = *head; 2238 *head = s; 2239 return 1; 2240 } 2241 2242 int 2243 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2, 2244 char* i3) 2245 { 2246 struct config_str3list *s; 2247 if(!item || !i2 || !i3 || !head) 2248 return 0; 2249 s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list)); 2250 if(!s) 2251 return 0; 2252 s->str = item; 2253 s->str2 = i2; 2254 s->str3 = i3; 2255 s->next = *head; 2256 *head = s; 2257 return 1; 2258 } 2259 2260 int 2261 cfg_strbytelist_insert(struct config_strbytelist** head, char* item, 2262 uint8_t* i2, size_t i2len) 2263 { 2264 struct config_strbytelist* s; 2265 if(!item || !i2 || !head) 2266 return 0; 2267 s = (struct config_strbytelist*)calloc(1, sizeof(*s)); 2268 if(!s) 2269 return 0; 2270 s->str = item; 2271 s->str2 = i2; 2272 s->str2len = i2len; 2273 s->next = *head; 2274 *head = s; 2275 return 1; 2276 } 2277 2278 time_t 2279 cfg_convert_timeval(const char* str) 2280 { 2281 time_t t; 2282 struct tm tm; 2283 memset(&tm, 0, sizeof(tm)); 2284 if(strlen(str) < 14) 2285 return 0; 2286 if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon, 2287 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) 2288 return 0; 2289 tm.tm_year -= 1900; 2290 tm.tm_mon--; 2291 /* Check values */ 2292 if (tm.tm_year < 70) return 0; 2293 if (tm.tm_mon < 0 || tm.tm_mon > 11) return 0; 2294 if (tm.tm_mday < 1 || tm.tm_mday > 31) return 0; 2295 if (tm.tm_hour < 0 || tm.tm_hour > 23) return 0; 2296 if (tm.tm_min < 0 || tm.tm_min > 59) return 0; 2297 if (tm.tm_sec < 0 || tm.tm_sec > 59) return 0; 2298 /* call ldns conversion function */ 2299 t = sldns_mktime_from_utc(&tm); 2300 return t; 2301 } 2302 2303 int 2304 cfg_count_numbers(const char* s) 2305 { 2306 /* format ::= (sp num)+ sp */ 2307 /* num ::= [-](0-9)+ */ 2308 /* sp ::= (space|tab)* */ 2309 int num = 0; 2310 while(*s) { 2311 while(*s && isspace((unsigned char)*s)) 2312 s++; 2313 if(!*s) /* end of string */ 2314 break; 2315 if(*s == '-') 2316 s++; 2317 if(!*s) /* only - not allowed */ 2318 return 0; 2319 if(!isdigit((unsigned char)*s)) /* bad character */ 2320 return 0; 2321 while(*s && isdigit((unsigned char)*s)) 2322 s++; 2323 num++; 2324 } 2325 return num; 2326 } 2327 2328 /** all digit number */ 2329 static int isalldigit(const char* str, size_t l) 2330 { 2331 size_t i; 2332 for(i=0; i<l; i++) 2333 if(!isdigit((unsigned char)str[i])) 2334 return 0; 2335 return 1; 2336 } 2337 2338 int 2339 cfg_parse_memsize(const char* str, size_t* res) 2340 { 2341 size_t len; 2342 size_t mult = 1; 2343 if(!str || (len=(size_t)strlen(str)) == 0) { 2344 log_err("not a size: '%s'", str); 2345 return 0; 2346 } 2347 if(isalldigit(str, len)) { 2348 *res = (size_t)atol(str); 2349 return 1; 2350 } 2351 /* check appended num */ 2352 while(len>0 && str[len-1]==' ') 2353 len--; 2354 if(len > 1 && str[len-1] == 'b') 2355 len--; 2356 else if(len > 1 && str[len-1] == 'B') 2357 len--; 2358 2359 if(len > 1 && tolower((unsigned char)str[len-1]) == 'g') 2360 mult = 1024*1024*1024; 2361 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm') 2362 mult = 1024*1024; 2363 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k') 2364 mult = 1024; 2365 else if(len > 0 && isdigit((unsigned char)str[len-1])) 2366 mult = 1; 2367 else { 2368 log_err("unknown size specifier: '%s'", str); 2369 return 0; 2370 } 2371 while(len>1 && str[len-2]==' ') 2372 len--; 2373 2374 if(!isalldigit(str, len-1)) { 2375 log_err("unknown size specifier: '%s'", str); 2376 return 0; 2377 } 2378 *res = ((size_t)atol(str)) * mult; 2379 return 1; 2380 } 2381 2382 int 2383 find_tag_id(struct config_file* cfg, const char* tag) 2384 { 2385 int i; 2386 for(i=0; i<cfg->num_tags; i++) { 2387 if(strcmp(cfg->tagname[i], tag) == 0) 2388 return i; 2389 } 2390 return -1; 2391 } 2392 2393 int 2394 config_add_tag(struct config_file* cfg, const char* tag) 2395 { 2396 char** newarray; 2397 char* newtag; 2398 if(find_tag_id(cfg, tag) != -1) 2399 return 1; /* nothing to do */ 2400 newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1)); 2401 if(!newarray) 2402 return 0; 2403 newtag = strdup(tag); 2404 if(!newtag) { 2405 free(newarray); 2406 return 0; 2407 } 2408 if(cfg->tagname) { 2409 memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags); 2410 free(cfg->tagname); 2411 } 2412 newarray[cfg->num_tags++] = newtag; 2413 cfg->tagname = newarray; 2414 return 1; 2415 } 2416 2417 /** set a bit in a bit array */ 2418 static void 2419 cfg_set_bit(uint8_t* bitlist, size_t len, int id) 2420 { 2421 int pos = id/8; 2422 log_assert((size_t)pos < len); 2423 (void)len; 2424 bitlist[pos] |= 1<<(id%8); 2425 } 2426 2427 uint8_t* config_parse_taglist(struct config_file* cfg, char* str, 2428 size_t* listlen) 2429 { 2430 uint8_t* taglist = NULL; 2431 size_t len = 0; 2432 char* p, *s; 2433 2434 /* allocate */ 2435 if(cfg->num_tags == 0) { 2436 log_err("parse taglist, but no tags defined"); 2437 return 0; 2438 } 2439 len = (size_t)(cfg->num_tags+7)/8; 2440 taglist = calloc(1, len); 2441 if(!taglist) { 2442 log_err("out of memory"); 2443 return 0; 2444 } 2445 2446 /* parse */ 2447 s = str; 2448 while((p=strsep(&s, " \t\n")) != NULL) { 2449 if(*p) { 2450 int id = find_tag_id(cfg, p); 2451 /* set this bit in the bitlist */ 2452 if(id == -1) { 2453 log_err("unknown tag: %s", p); 2454 free(taglist); 2455 return 0; 2456 } 2457 cfg_set_bit(taglist, len, id); 2458 } 2459 } 2460 2461 *listlen = len; 2462 return taglist; 2463 } 2464 2465 uint8_t* cfg_parse_nsid(const char* str, uint16_t* nsid_len) 2466 { 2467 uint8_t* nsid = NULL; 2468 2469 if (strncasecmp(str, "ascii_", 6) == 0) { 2470 if ((nsid = (uint8_t *)strdup(str + 6))) 2471 *nsid_len = strlen(str + 6); 2472 2473 } else if (strlen(str) % 2) { 2474 ; /* hex string has even number of characters */ 2475 } 2476 2477 else if (*str && (nsid = calloc(1, strlen(str) / 2))) { 2478 const char *ch; 2479 uint8_t *dp; 2480 2481 for ( ch = str, dp = nsid 2482 ; isxdigit((unsigned char)ch[0]) && isxdigit((unsigned char)ch[1]) 2483 ; ch += 2, dp++) { 2484 *dp = (uint8_t)sldns_hexdigit_to_int(ch[0]) * 16; 2485 *dp += (uint8_t)sldns_hexdigit_to_int(ch[1]); 2486 } 2487 if (*ch) { 2488 free(nsid); 2489 nsid = NULL; 2490 } else 2491 *nsid_len = strlen(str) / 2; 2492 } 2493 return nsid; 2494 } 2495 2496 2497 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist, 2498 size_t taglen) 2499 { 2500 char buf[10240]; 2501 size_t i, j, len = 0; 2502 buf[0] = 0; 2503 for(i=0; i<taglen; i++) { 2504 if(taglist[i] == 0) 2505 continue; 2506 for(j=0; j<8; j++) { 2507 if((taglist[i] & (1<<j)) != 0) { 2508 size_t id = i*8 + j; 2509 snprintf(buf+len, sizeof(buf)-len, "%s%s", 2510 (len==0?"":" "), cfg->tagname[id]); 2511 len += strlen(buf+len); 2512 } 2513 } 2514 } 2515 return strdup(buf); 2516 } 2517 2518 int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2, 2519 size_t list2len) 2520 { 2521 size_t i; 2522 if(!list1 || !list2) 2523 return 0; 2524 for(i=0; i<list1len && i<list2len; i++) { 2525 if((list1[i] & list2[i]) != 0) 2526 return 1; 2527 } 2528 return 0; 2529 } 2530 2531 void 2532 config_apply(struct config_file* config) 2533 { 2534 MAX_TTL = (time_t)config->max_ttl; 2535 MIN_TTL = (time_t)config->min_ttl; 2536 SERVE_EXPIRED = config->serve_expired; 2537 SERVE_EXPIRED_TTL = (time_t)config->serve_expired_ttl; 2538 SERVE_EXPIRED_TTL_RESET = config->serve_expired_ttl_reset; 2539 SERVE_EXPIRED_REPLY_TTL = (time_t)config->serve_expired_reply_ttl; 2540 SERVE_ORIGINAL_TTL = config->serve_original_ttl; 2541 MAX_NEG_TTL = (time_t)config->max_negative_ttl; 2542 MIN_NEG_TTL = (time_t)config->min_negative_ttl; 2543 RTT_MIN_TIMEOUT = config->infra_cache_min_rtt; 2544 RTT_MAX_TIMEOUT = config_apply_max_rtt(config->infra_cache_max_rtt); 2545 EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size; 2546 MINIMAL_RESPONSES = config->minimal_responses; 2547 RRSET_ROUNDROBIN = config->rrset_roundrobin; 2548 LOG_TAG_QUERYREPLY = config->log_tag_queryreply; 2549 MAX_GLOBAL_QUOTA = config->max_global_quota; 2550 UNKNOWN_SERVER_NICENESS = config->unknown_server_time_limit; 2551 log_set_time_asc(config->log_time_ascii); 2552 log_set_time_iso(config->log_time_iso); 2553 autr_permit_small_holddown = config->permit_small_holddown; 2554 stream_wait_max = config->stream_wait_size; 2555 http2_query_buffer_max = config->http_query_buffer_size; 2556 http2_response_buffer_max = config->http_response_buffer_size; 2557 } 2558 2559 void config_lookup_uid(struct config_file* cfg) 2560 { 2561 #ifdef HAVE_GETPWNAM 2562 /* translate username into uid and gid */ 2563 if(cfg->username && cfg->username[0]) { 2564 struct passwd *pwd; 2565 if((pwd = getpwnam(cfg->username)) != NULL) { 2566 cfg_uid = pwd->pw_uid; 2567 cfg_gid = pwd->pw_gid; 2568 } 2569 } 2570 #else 2571 (void)cfg; 2572 #endif 2573 } 2574 2575 /** 2576 * Calculate string length of full pathname in original filesys 2577 * @param fname: the path name to convert. 2578 * Must not be null or empty. 2579 * @param cfg: config struct for chroot and chdir (if set). 2580 * @param use_chdir: if false, only chroot is applied. 2581 * @return length of string. 2582 * remember to allocate one more for 0 at end in mallocs. 2583 */ 2584 static size_t 2585 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) 2586 { 2587 size_t len = 0; 2588 int slashit = 0; 2589 if(cfg->chrootdir && cfg->chrootdir[0] && 2590 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { 2591 /* already full pathname, return it */ 2592 return strlen(fname); 2593 } 2594 /* chroot */ 2595 if(cfg->chrootdir && cfg->chrootdir[0]) { 2596 /* start with chrootdir */ 2597 len += strlen(cfg->chrootdir); 2598 slashit = 1; 2599 } 2600 /* chdir */ 2601 #ifdef UB_ON_WINDOWS 2602 if(fname[0] != 0 && fname[1] == ':') { 2603 /* full path, no chdir */ 2604 } else 2605 #endif 2606 if(fname[0] == '/' || !use_chdir) { 2607 /* full path, no chdir */ 2608 } else if(cfg->directory && cfg->directory[0]) { 2609 /* prepend chdir */ 2610 if(slashit && cfg->directory[0] != '/') 2611 len++; 2612 if(cfg->chrootdir && cfg->chrootdir[0] && 2613 strncmp(cfg->chrootdir, cfg->directory, 2614 strlen(cfg->chrootdir)) == 0) 2615 len += strlen(cfg->directory)-strlen(cfg->chrootdir); 2616 else len += strlen(cfg->directory); 2617 slashit = 1; 2618 } 2619 /* fname */ 2620 if(slashit && fname[0] != '/') 2621 len++; 2622 len += strlen(fname); 2623 return len; 2624 } 2625 2626 char* 2627 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) 2628 { 2629 size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1; 2630 int slashit = 0; 2631 char* buf = (char*)malloc(len); 2632 if(!buf) 2633 return NULL; 2634 buf[0] = 0; 2635 /* is fname already in chroot ? */ 2636 if(cfg->chrootdir && cfg->chrootdir[0] && 2637 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { 2638 /* already full pathname, return it */ 2639 (void)strlcpy(buf, fname, len); 2640 buf[len-1] = 0; 2641 return buf; 2642 } 2643 /* chroot */ 2644 if(cfg->chrootdir && cfg->chrootdir[0]) { 2645 /* start with chrootdir */ 2646 (void)strlcpy(buf, cfg->chrootdir, len); 2647 slashit = 1; 2648 } 2649 #ifdef UB_ON_WINDOWS 2650 if(fname[0] != 0 && fname[1] == ':') { 2651 /* full path, no chdir */ 2652 } else 2653 #endif 2654 /* chdir */ 2655 if(fname[0] == '/' || !use_chdir) { 2656 /* full path, no chdir */ 2657 } else if(cfg->directory && cfg->directory[0]) { 2658 /* prepend chdir */ 2659 if(slashit && cfg->directory[0] != '/') 2660 (void)strlcat(buf, "/", len); 2661 /* is the directory already in the chroot? */ 2662 if(cfg->chrootdir && cfg->chrootdir[0] && 2663 strncmp(cfg->chrootdir, cfg->directory, 2664 strlen(cfg->chrootdir)) == 0) 2665 (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir), 2666 len); 2667 else (void)strlcat(buf, cfg->directory, len); 2668 slashit = 1; 2669 } 2670 /* fname */ 2671 if(slashit && fname[0] != '/') 2672 (void)strlcat(buf, "/", len); 2673 (void)strlcat(buf, fname, len); 2674 buf[len-1] = 0; 2675 return buf; 2676 } 2677 2678 /** return next space character in string */ 2679 static const char* next_space_pos(const char* str) 2680 { 2681 const char* sp = strchr(str, ' '); 2682 const char* tab = strchr(str, '\t'); 2683 if(!tab && !sp) 2684 return NULL; 2685 if(!sp) return tab; 2686 if(!tab) return sp; 2687 return (sp<tab)?sp:tab; 2688 } 2689 2690 /** return last space character in string */ 2691 static const char* last_space_pos(const char* str) 2692 { 2693 const char* sp = strrchr(str, ' '); 2694 const char* tab = strrchr(str, '\t'); 2695 if(!tab && !sp) 2696 return NULL; 2697 if(!sp) return tab; 2698 if(!tab) return sp; 2699 return (sp>tab)?sp:tab; 2700 } 2701 2702 int 2703 cfg_parse_local_zone(struct config_file* cfg, const char* val) 2704 { 2705 const char *type, *name_end, *name; 2706 char buf[256]; 2707 2708 /* parse it as: [zone_name] [between stuff] [zone_type] */ 2709 name = val; 2710 while(*name && isspace((unsigned char)*name)) 2711 name++; 2712 if(!*name) { 2713 log_err("syntax error: too short: %s", val); 2714 return 0; 2715 } 2716 name_end = next_space_pos(name); 2717 if(!name_end || !*name_end) { 2718 log_err("syntax error: expected zone type: %s", val); 2719 return 0; 2720 } 2721 if (name_end - name > 255) { 2722 log_err("syntax error: bad zone name: %s", val); 2723 return 0; 2724 } 2725 (void)strlcpy(buf, name, sizeof(buf)); 2726 buf[name_end-name] = '\0'; 2727 2728 type = last_space_pos(name_end); 2729 while(type && *type && isspace((unsigned char)*type)) 2730 type++; 2731 if(!type || !*type) { 2732 log_err("syntax error: expected zone type: %s", val); 2733 return 0; 2734 } 2735 2736 if(strcmp(type, "nodefault")==0) { 2737 return cfg_strlist_insert(&cfg->local_zones_nodefault, 2738 strdup(name)); 2739 #ifdef USE_IPSET 2740 } else if(strcmp(type, "ipset")==0) { 2741 return cfg_strlist_insert(&cfg->local_zones_ipset, 2742 strdup(name)); 2743 #endif 2744 } else { 2745 return cfg_str2list_insert(&cfg->local_zones, strdup(buf), 2746 strdup(type)); 2747 } 2748 } 2749 2750 char* cfg_ptr_reverse(char* str) 2751 { 2752 const char* ip, *ip_end; 2753 const char* name; 2754 char* result; 2755 char buf[1024]; 2756 struct sockaddr_storage addr; 2757 socklen_t addrlen; 2758 2759 /* parse it as: [IP] [between stuff] [name] */ 2760 ip = str; 2761 while(*ip && isspace((unsigned char)*ip)) 2762 ip++; 2763 if(!*ip) { 2764 log_err("syntax error: too short: %s", str); 2765 return NULL; 2766 } 2767 ip_end = next_space_pos(ip); 2768 if(!ip_end || !*ip_end) { 2769 log_err("syntax error: expected name: %s", str); 2770 return NULL; 2771 } 2772 2773 name = last_space_pos(ip_end); 2774 if(!name || !*name) { 2775 log_err("syntax error: expected name: %s", str); 2776 return NULL; 2777 } 2778 2779 sscanf(ip, "%100s", buf); 2780 buf[sizeof(buf)-1]=0; 2781 2782 if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) { 2783 log_err("syntax error: cannot parse address: %s", str); 2784 return NULL; 2785 } 2786 2787 /* reverse IPv4: 2788 * ddd.ddd.ddd.ddd.in-addr-arpa. 2789 * IPv6: (h.){32}.ip6.arpa. */ 2790 2791 if(addr_is_ip6(&addr, addrlen)) { 2792 uint8_t ad[16]; 2793 const char* hex = "0123456789abcdef"; 2794 char *p = buf; 2795 int i; 2796 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr, 2797 sizeof(ad)); 2798 for(i=15; i>=0; i--) { 2799 uint8_t b = ad[i]; 2800 *p++ = hex[ (b&0x0f) ]; 2801 *p++ = '.'; 2802 *p++ = hex[ (b&0xf0) >> 4 ]; 2803 *p++ = '.'; 2804 } 2805 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. "); 2806 } else { 2807 uint8_t ad[4]; 2808 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr, 2809 sizeof(ad)); 2810 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ", 2811 (unsigned)ad[3], (unsigned)ad[2], 2812 (unsigned)ad[1], (unsigned)ad[0]); 2813 } 2814 2815 /* printed the reverse address, now the between goop and name on end */ 2816 while(*ip_end && isspace((unsigned char)*ip_end)) 2817 ip_end++; 2818 if(name>ip_end) { 2819 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s", 2820 (int)(name-ip_end), ip_end); 2821 } 2822 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name); 2823 2824 result = strdup(buf); 2825 if(!result) { 2826 log_err("out of memory parsing %s", str); 2827 return NULL; 2828 } 2829 return result; 2830 } 2831 2832 #ifdef UB_ON_WINDOWS 2833 char* 2834 w_lookup_reg_str(const char* key, const char* name) 2835 { 2836 HKEY hk = NULL; 2837 DWORD type = 0; 2838 BYTE buf[1024]; 2839 DWORD len = (DWORD)sizeof(buf); 2840 LONG ret; 2841 char* result = NULL; 2842 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk); 2843 if(ret == ERROR_FILE_NOT_FOUND) 2844 return NULL; /* key does not exist */ 2845 else if(ret != ERROR_SUCCESS) { 2846 log_err("RegOpenKeyEx failed"); 2847 return NULL; 2848 } 2849 ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len); 2850 if(RegCloseKey(hk)) 2851 log_err("RegCloseKey"); 2852 if(ret == ERROR_FILE_NOT_FOUND) 2853 return NULL; /* name does not exist */ 2854 else if(ret != ERROR_SUCCESS) { 2855 log_err("RegQueryValueEx failed"); 2856 return NULL; 2857 } 2858 if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) { 2859 buf[sizeof(buf)-1] = 0; 2860 buf[sizeof(buf)-2] = 0; /* for multi_sz */ 2861 result = strdup((char*)buf); 2862 if(!result) log_err("out of memory"); 2863 } 2864 return result; 2865 } 2866 2867 void w_config_adjust_directory(struct config_file* cfg) 2868 { 2869 if(cfg->directory && cfg->directory[0]) { 2870 TCHAR dirbuf[2*MAX_PATH+4]; 2871 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) { 2872 /* get executable path, and if that contains 2873 * directories, snip off the filename part */ 2874 dirbuf[0] = 0; 2875 if(!GetModuleFileName(NULL, dirbuf, MAX_PATH)) 2876 log_err("could not GetModuleFileName"); 2877 if(strrchr(dirbuf, '\\')) { 2878 (strrchr(dirbuf, '\\'))[0] = 0; 2879 } else log_err("GetModuleFileName had no path"); 2880 if(dirbuf[0]) { 2881 /* adjust directory for later lookups to work*/ 2882 free(cfg->directory); 2883 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1); 2884 } 2885 } 2886 } 2887 } 2888 #endif /* UB_ON_WINDOWS */ 2889 2890 int options_remote_is_address(struct config_file* cfg) 2891 { 2892 if(!cfg->remote_control_enable) return 0; 2893 if(!cfg->control_ifs.first) return 1; 2894 if(!cfg->control_ifs.first->str) return 1; 2895 if(cfg->control_ifs.first->str[0] == 0) return 1; 2896 return (cfg->control_ifs.first->str[0] != '/'); 2897 } 2898 2899 int 2900 if_listens_on(const char* ifname, int default_port, int port, 2901 struct config_strlist* additional_ports) 2902 { 2903 struct config_strlist* s; 2904 const char* p = strchr(ifname, '@'); 2905 int if_port; 2906 if(p) if_port = atoi(p+1); 2907 else if_port = default_port; 2908 2909 if(port && if_port == port) return 1; 2910 2911 for(s = additional_ports; s; s = s->next) { 2912 if(if_port == atoi(s->str)) return 1; 2913 } 2914 return 0; 2915 } 2916 2917 int 2918 if_is_ssl(const char* ifname, int default_port, int ssl_port, 2919 struct config_strlist* tls_additional_port) 2920 { 2921 return if_listens_on(ifname, default_port, ssl_port, 2922 tls_additional_port); 2923 } 2924 2925 int 2926 if_is_pp2(const char* ifname, int default_port, 2927 struct config_strlist* proxy_protocol_port) 2928 { 2929 return if_listens_on(ifname, default_port, 0, proxy_protocol_port); 2930 } 2931 2932 int 2933 if_is_https(const char* ifname, int default_port, int https_port) 2934 { 2935 return if_listens_on(ifname, default_port, https_port, NULL); 2936 } 2937 2938 int 2939 if_is_dnscrypt(const char* ifname, int default_port, int dnscrypt_port) 2940 { 2941 #ifdef USE_DNSCRYPT 2942 return if_listens_on(ifname, default_port, dnscrypt_port, NULL); 2943 #else 2944 (void)ifname; 2945 (void)default_port; 2946 (void)dnscrypt_port; 2947 return 0; 2948 #endif 2949 } 2950 2951 size_t 2952 getmem_str(char* str) 2953 { 2954 if(!str) return 0; 2955 return strlen(str)+1; 2956 } 2957 2958 int 2959 if_is_quic(const char* ifname, int default_port, int quic_port) 2960 { 2961 #ifdef HAVE_NGTCP2 2962 return if_listens_on(ifname, default_port, quic_port, NULL); 2963 #else 2964 (void)ifname; 2965 (void)default_port; 2966 (void)quic_port; 2967 return 0; 2968 #endif 2969 } 2970 2971 int 2972 cfg_ports_list_contains(char* ports, int p) 2973 { 2974 char* now = ports, *after; 2975 int extraport; 2976 while(now && *now) { 2977 while(isspace((unsigned char)*now)) 2978 now++; 2979 if(!now) 2980 break; 2981 after = now; 2982 extraport = (int)strtol(now, &after, 10); 2983 if(extraport < 0 || extraport > 65535) 2984 continue; /* Out of range. */ 2985 if(extraport == 0 && now == after) 2986 return 0; /* Number could not be parsed. */ 2987 now = after; 2988 if(extraport == p) 2989 return 1; 2990 } 2991 return 0; 2992 } 2993 2994 int 2995 cfg_has_https(struct config_file* cfg) 2996 { 2997 int i; 2998 for(i = 0; i<cfg->num_ifs; i++) { 2999 if(if_is_https(cfg->ifs[i], cfg->port, cfg->https_port)) 3000 return 1; 3001 } 3002 if(cfg_ports_list_contains(cfg->if_automatic_ports, cfg->https_port)) 3003 return 1; 3004 return 0; 3005 } 3006 3007 int 3008 cfg_has_quic(struct config_file* cfg) 3009 { 3010 #ifdef HAVE_NGTCP2 3011 int i; 3012 for(i = 0; i<cfg->num_ifs; i++) { 3013 if(if_is_quic(cfg->ifs[i], cfg->port, cfg->quic_port)) 3014 return 1; 3015 } 3016 if(cfg_ports_list_contains(cfg->if_automatic_ports, cfg->quic_port)) 3017 return 1; 3018 return 0; 3019 #else 3020 (void)cfg; 3021 return 0; 3022 #endif 3023 } 3024 3025 int 3026 cfg_tls_protocols_is_valid(const char* tls_protocols) 3027 { 3028 const char* s = tls_protocols; 3029 while(*s && isspace((unsigned char)*s)) s++; 3030 while(*s && !isspace((unsigned char)*s)) { 3031 if(strncmp(s, "TLSv1.2", 7) == 0 || 3032 strncmp(s, "TLSv1.3", 7) == 0) { 3033 s += 7; 3034 if(*s && !isspace((unsigned char)*s)) { 3035 /* something is attached; fail */ 3036 return 0; 3037 } 3038 while(*s && isspace((unsigned char)*s)) 3039 s++; 3040 continue; 3041 } 3042 return 0; 3043 } 3044 return 1; 3045 } 3046 3047 void 3048 cfg_tls_protocols_allowed(const char* tls_protocols, int* allow12, int* allow13) 3049 { 3050 const char* s = tls_protocols; 3051 *allow12 = 0; 3052 *allow13 = 0; 3053 if(tls_protocols == NULL) return; 3054 while(*s && isspace((unsigned char)*s)) s++; 3055 while(*s && !isspace((unsigned char)*s)) { 3056 if(strncmp(s, "TLSv1.2", 7) == 0) { 3057 *allow12 = 1; 3058 s += 7; 3059 } else if(strncmp(s, "TLSv1.3", 7) == 0) { 3060 *allow13 = 1; 3061 s += 7; 3062 } else { 3063 /* Unknown word, this should never happen but skip to 3064 * be safe */ 3065 while(*s && !isspace((unsigned char)*s)) 3066 s++; 3067 } 3068 while(*s && isspace((unsigned char)*s)) 3069 s++; 3070 } 3071 } 3072 3073 int 3074 file_get_mtime(const char* file, time_t* mtime, long* ns, int* nonexist) 3075 { 3076 struct stat s; 3077 if(stat(file, &s) != 0) { 3078 *mtime = 0; 3079 *ns = 0; 3080 if(nonexist) 3081 *nonexist = (errno == ENOENT); 3082 return 0; 3083 } 3084 if(nonexist) 3085 *nonexist = 0; 3086 *mtime = s.st_mtime; 3087 #ifdef HAVE_STRUCT_STAT_ST_MTIMENSEC 3088 *ns = s.st_mtimensec; 3089 #elif defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC) 3090 *ns = s.st_mtim.tv_nsec; 3091 #else 3092 *ns = 0; 3093 #endif 3094 return 1; 3095 } 3096