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 "util/log.h" 50 #include "util/configyyrename.h" 51 #include "util/config_file.h" 52 #include "util/configparser.h" 53 #include "util/net_help.h" 54 #include "util/data/msgparse.h" 55 #include "util/module.h" 56 #include "util/regional.h" 57 #include "util/fptr_wlist.h" 58 #include "util/data/dname.h" 59 #include "util/random.h" 60 #include "util/rtt.h" 61 #include "services/cache/infra.h" 62 #include "sldns/wire2str.h" 63 #include "sldns/parseutil.h" 64 #include "iterator/iterator.h" 65 #ifdef HAVE_SYS_STAT_H 66 #include <sys/stat.h> 67 #endif 68 #ifdef HAVE_GLOB_H 69 # include <glob.h> 70 #endif 71 #ifdef CLIENT_SUBNET 72 #include "edns-subnet/edns-subnet.h" 73 #endif 74 #ifdef HAVE_PWD_H 75 #include <pwd.h> 76 #endif 77 78 /** from cfg username, after daemonize setup performed */ 79 uid_t cfg_uid = (uid_t)-1; 80 /** from cfg username, after daemonize setup performed */ 81 gid_t cfg_gid = (gid_t)-1; 82 /** for debug allow small timeout values for fast rollovers */ 83 int autr_permit_small_holddown = 0; 84 /** size (in bytes) of stream wait buffers max */ 85 size_t stream_wait_max = 4 * 1024 * 1024; 86 size_t http2_query_buffer_max = 4 * 1024 * 1024; 87 size_t http2_response_buffer_max = 4 * 1024 * 1024; 88 89 /** global config during parsing */ 90 struct config_parser_state* cfg_parser = 0; 91 92 /** init ports possible for use */ 93 static void init_outgoing_availports(int* array, int num); 94 95 /** init cookie with random data */ 96 static void init_cookie_secret(uint8_t* cookie_secret, size_t cookie_secret_len); 97 98 struct config_file* 99 config_create(void) 100 { 101 struct config_file* cfg; 102 cfg = (struct config_file*)calloc(1, sizeof(struct config_file)); 103 if(!cfg) 104 return NULL; 105 /* the defaults if no config is present */ 106 cfg->verbosity = 1; 107 cfg->stat_interval = 0; 108 cfg->stat_cumulative = 0; 109 cfg->stat_extended = 0; 110 cfg->stat_inhibit_zero = 1; 111 cfg->num_threads = 1; 112 cfg->port = UNBOUND_DNS_PORT; 113 cfg->do_ip4 = 1; 114 cfg->do_ip6 = 1; 115 cfg->do_udp = 1; 116 cfg->do_tcp = 1; 117 cfg->tcp_reuse_timeout = 60 * 1000; /* 60s in milisecs */ 118 cfg->max_reuse_tcp_queries = 200; 119 cfg->tcp_upstream = 0; 120 cfg->udp_upstream_without_downstream = 0; 121 cfg->tcp_mss = 0; 122 cfg->outgoing_tcp_mss = 0; 123 cfg->tcp_idle_timeout = 30 * 1000; /* 30s in millisecs */ 124 cfg->tcp_auth_query_timeout = 3 * 1000; /* 3s in millisecs */ 125 cfg->do_tcp_keepalive = 0; 126 cfg->tcp_keepalive_timeout = 120 * 1000; /* 120s in millisecs */ 127 cfg->sock_queue_timeout = 0; /* do not check timeout */ 128 cfg->ssl_service_key = NULL; 129 cfg->ssl_service_pem = NULL; 130 cfg->ssl_port = UNBOUND_DNS_OVER_TLS_PORT; 131 cfg->ssl_upstream = 0; 132 cfg->tls_cert_bundle = NULL; 133 cfg->tls_win_cert = 0; 134 cfg->tls_use_sni = 1; 135 if(!(cfg->tls_protocols = strdup("TLSv1.2 TLSv1.3"))) goto error_exit; 136 cfg->https_port = UNBOUND_DNS_OVER_HTTPS_PORT; 137 if(!(cfg->http_endpoint = strdup("/dns-query"))) goto error_exit; 138 cfg->http_max_streams = 100; 139 cfg->http_query_buffer_size = 4*1024*1024; 140 cfg->http_response_buffer_size = 4*1024*1024; 141 cfg->http_nodelay = 1; 142 cfg->quic_port = UNBOUND_DNS_OVER_QUIC_PORT; 143 cfg->quic_size = 8*1024*1024; 144 cfg->use_syslog = 1; 145 cfg->log_identity = NULL; /* changed later with argv[0] */ 146 cfg->log_time_ascii = 0; 147 cfg->log_time_iso = 0; 148 cfg->log_queries = 0; 149 cfg->log_replies = 0; 150 cfg->log_tag_queryreply = 0; 151 cfg->log_local_actions = 0; 152 cfg->log_servfail = 0; 153 cfg->log_destaddr = 0; 154 cfg->log_thread_id = 0; 155 #ifndef USE_WINSOCK 156 # ifdef USE_MINI_EVENT 157 /* select max 1024 sockets */ 158 cfg->outgoing_num_ports = 960; 159 cfg->num_queries_per_thread = 512; 160 # else 161 /* libevent can use many sockets */ 162 cfg->outgoing_num_ports = 4096; 163 cfg->num_queries_per_thread = 2048; 164 # endif 165 cfg->outgoing_num_tcp = 10; 166 cfg->incoming_num_tcp = 10; 167 #else 168 cfg->outgoing_num_ports = 48; /* windows is limited in num fds */ 169 cfg->num_queries_per_thread = 24; 170 cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */ 171 cfg->incoming_num_tcp = 2; 172 #endif 173 cfg->stream_wait_size = 4 * 1024 * 1024; 174 cfg->edns_buffer_size = 1232; /* from DNS flagday recommendation */ 175 cfg->msg_buffer_size = 65552; /* 64 k + a small margin */ 176 cfg->msg_cache_size = 4 * 1024 * 1024; 177 cfg->msg_cache_slabs = 0; 178 cfg->jostle_time = 200; 179 cfg->rrset_cache_size = 4 * 1024 * 1024; 180 cfg->rrset_cache_slabs = 0; 181 cfg->host_ttl = 900; 182 cfg->bogus_ttl = 60; 183 cfg->min_ttl = 0; 184 cfg->max_ttl = 3600 * 24; 185 cfg->max_negative_ttl = 3600; 186 cfg->min_negative_ttl = 0; 187 cfg->prefetch = 0; 188 cfg->prefetch_key = 0; 189 cfg->deny_any = 0; 190 cfg->infra_cache_slabs = 0; 191 cfg->infra_cache_numhosts = 10000; 192 cfg->infra_cache_min_rtt = 50; 193 cfg->infra_cache_max_rtt = 120000; 194 cfg->infra_keep_probing = 0; 195 cfg->delay_close = 0; 196 cfg->udp_connect = 1; 197 if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int)))) 198 goto error_exit; 199 init_outgoing_availports(cfg->outgoing_avail_ports, 65536); 200 if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit; 201 #ifdef HAVE_CHROOT 202 if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit; 203 #endif 204 if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit; 205 if(!(cfg->logfile = strdup(""))) goto error_exit; 206 if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit; 207 if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit; 208 cfg->fast_server_permil = 0; 209 cfg->fast_server_num = 3; 210 cfg->donotqueryaddrs = NULL; 211 cfg->donotquery_localhost = 1; 212 cfg->root_hints = NULL; 213 cfg->use_systemd = 0; 214 cfg->do_daemonize = 1; 215 cfg->if_automatic = 0; 216 cfg->if_automatic_ports = NULL; 217 cfg->so_rcvbuf = 0; 218 cfg->so_sndbuf = 4*1024*1024; 219 cfg->so_reuseport = REUSEPORT_DEFAULT; 220 cfg->ip_transparent = 0; 221 cfg->ip_freebind = 0; 222 cfg->ip_dscp = 0; 223 cfg->num_ifs = 0; 224 cfg->ifs = NULL; 225 cfg->num_out_ifs = 0; 226 cfg->out_ifs = NULL; 227 cfg->stubs = NULL; 228 cfg->forwards = NULL; 229 cfg->auths = NULL; 230 #ifdef CLIENT_SUBNET 231 cfg->client_subnet = NULL; 232 cfg->client_subnet_zone = NULL; 233 cfg->client_subnet_opcode = LDNS_EDNS_CLIENT_SUBNET; 234 cfg->client_subnet_always_forward = 0; 235 cfg->max_client_subnet_ipv4 = 24; 236 cfg->max_client_subnet_ipv6 = 56; 237 cfg->min_client_subnet_ipv4 = 0; 238 cfg->min_client_subnet_ipv6 = 0; 239 cfg->max_ecs_tree_size_ipv4 = 100; 240 cfg->max_ecs_tree_size_ipv6 = 100; 241 #endif 242 cfg->views = NULL; 243 cfg->acls = NULL; 244 cfg->tcp_connection_limits = NULL; 245 cfg->harden_short_bufsize = 1; 246 cfg->harden_large_queries = 0; 247 cfg->harden_glue = 1; 248 cfg->harden_unverified_glue = 0; 249 cfg->harden_dnssec_stripped = 1; 250 cfg->harden_below_nxdomain = 1; 251 cfg->harden_referral_path = 0; 252 cfg->harden_algo_downgrade = 0; 253 cfg->harden_unknown_additional = 0; 254 cfg->use_caps_bits_for_id = 0; 255 cfg->caps_whitelist = NULL; 256 cfg->private_address = NULL; 257 cfg->private_domain = NULL; 258 cfg->unwanted_threshold = 0; 259 cfg->hide_identity = 0; 260 cfg->hide_version = 0; 261 cfg->hide_trustanchor = 0; 262 cfg->hide_http_user_agent = 0; 263 cfg->identity = NULL; 264 cfg->version = NULL; 265 cfg->http_user_agent = NULL; 266 cfg->nsid_cfg_str = NULL; 267 cfg->nsid = NULL; 268 cfg->nsid_len = 0; 269 cfg->auto_trust_anchor_file_list = NULL; 270 cfg->trust_anchor_file_list = NULL; 271 cfg->trust_anchor_list = NULL; 272 cfg->trusted_keys_file_list = NULL; 273 cfg->trust_anchor_signaling = 1; 274 cfg->root_key_sentinel = 1; 275 cfg->domain_insecure = NULL; 276 cfg->val_date_override = 0; 277 cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */ 278 cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */ 279 cfg->val_max_restart = 5; 280 cfg->val_clean_additional = 1; 281 cfg->val_log_level = 0; 282 cfg->val_log_squelch = 0; 283 cfg->val_permissive_mode = 0; 284 cfg->aggressive_nsec = 1; 285 cfg->ignore_cd = 0; 286 cfg->disable_edns_do = 0; 287 cfg->serve_expired = 0; 288 cfg->serve_expired_ttl = 86400; 289 cfg->serve_expired_ttl_reset = 0; 290 cfg->serve_expired_reply_ttl = 30; 291 cfg->serve_expired_client_timeout = 1800; 292 cfg->serve_original_ttl = 0; 293 cfg->zonemd_permissive_mode = 0; 294 cfg->add_holddown = 30*24*3600; 295 cfg->del_holddown = 30*24*3600; 296 cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */ 297 cfg->permit_small_holddown = 0; 298 cfg->key_cache_size = 4 * 1024 * 1024; 299 cfg->key_cache_slabs = 0; 300 cfg->neg_cache_size = 1 * 1024 * 1024; 301 cfg->local_zones = NULL; 302 cfg->local_zones_nodefault = NULL; 303 #ifdef USE_IPSET 304 cfg->local_zones_ipset = NULL; 305 #endif 306 cfg->local_zones_disable_default = 0; 307 cfg->local_data = NULL; 308 cfg->local_zone_overrides = NULL; 309 cfg->unblock_lan_zones = 0; 310 cfg->insecure_lan_zones = 0; 311 cfg->python_script = NULL; 312 cfg->dynlib_file = NULL; 313 cfg->remote_control_enable = 0; 314 cfg->control_ifs.first = NULL; 315 cfg->control_ifs.last = NULL; 316 cfg->control_port = UNBOUND_CONTROL_PORT; 317 cfg->control_use_cert = 1; 318 cfg->minimal_responses = 1; 319 cfg->rrset_roundrobin = 1; 320 cfg->unknown_server_time_limit = 376; 321 cfg->discard_timeout = 1900; /* msec */ 322 cfg->wait_limit = 1000; 323 cfg->wait_limit_cookie = 10000; 324 cfg->wait_limit_netblock = NULL; 325 cfg->wait_limit_cookie_netblock = NULL; 326 cfg->max_udp_size = 1232; /* value taken from edns_buffer_size */ 327 if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key"))) 328 goto error_exit; 329 if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem"))) 330 goto error_exit; 331 if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key"))) 332 goto error_exit; 333 if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem"))) 334 goto error_exit; 335 336 if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit; 337 if(!(cfg->val_nsec3_key_iterations = 338 strdup("1024 150 2048 150 4096 150"))) goto error_exit; 339 #if defined(DNSTAP_SOCKET_PATH) 340 if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH))) 341 goto error_exit; 342 #endif 343 cfg->dnstap_bidirectional = 1; 344 cfg->dnstap_tls = 1; 345 cfg->disable_dnssec_lame_check = 0; 346 cfg->ip_ratelimit_cookie = 0; 347 cfg->ip_ratelimit = 0; 348 cfg->ratelimit = 0; 349 cfg->ip_ratelimit_slabs = 0; 350 cfg->ratelimit_slabs = 0; 351 cfg->ip_ratelimit_size = 4*1024*1024; 352 cfg->ratelimit_size = 4*1024*1024; 353 cfg->ratelimit_for_domain = NULL; 354 cfg->ratelimit_below_domain = NULL; 355 cfg->ip_ratelimit_factor = 10; 356 cfg->ratelimit_factor = 10; 357 cfg->ip_ratelimit_backoff = 0; 358 cfg->ratelimit_backoff = 0; 359 cfg->outbound_msg_retry = 5; 360 cfg->max_sent_count = 32; 361 cfg->max_query_restarts = 11; 362 cfg->qname_minimisation = 1; 363 cfg->qname_minimisation_strict = 0; 364 cfg->shm_enable = 0; 365 cfg->shm_key = 11777; 366 cfg->edns_client_strings = NULL; 367 cfg->edns_client_string_opcode = 65001; 368 cfg->dnscrypt = 0; 369 cfg->dnscrypt_port = 0; 370 cfg->dnscrypt_provider = NULL; 371 cfg->dnscrypt_provider_cert = NULL; 372 cfg->dnscrypt_provider_cert_rotated = NULL; 373 cfg->dnscrypt_secret_key = NULL; 374 cfg->dnscrypt_shared_secret_cache_size = 4*1024*1024; 375 cfg->dnscrypt_shared_secret_cache_slabs = 0; 376 cfg->dnscrypt_nonce_cache_size = 4*1024*1024; 377 cfg->dnscrypt_nonce_cache_slabs = 0; 378 cfg->pad_responses = 1; 379 cfg->pad_responses_block_size = 468; /* from RFC8467 */ 380 cfg->pad_queries = 1; 381 cfg->pad_queries_block_size = 128; /* from RFC8467 */ 382 #ifdef USE_IPSECMOD 383 cfg->ipsecmod_enabled = 1; 384 cfg->ipsecmod_ignore_bogus = 0; 385 cfg->ipsecmod_hook = NULL; 386 cfg->ipsecmod_max_ttl = 3600; 387 cfg->ipsecmod_whitelist = NULL; 388 cfg->ipsecmod_strict = 0; 389 #endif 390 cfg->do_answer_cookie = 0; 391 memset(cfg->cookie_secret, 0, sizeof(cfg->cookie_secret)); 392 cfg->cookie_secret_len = 16; 393 init_cookie_secret(cfg->cookie_secret, cfg->cookie_secret_len); 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 return cfg; 433 error_exit: 434 config_delete(cfg); 435 return NULL; 436 } 437 438 struct config_file* config_create_forlib(void) 439 { 440 struct config_file* cfg = config_create(); 441 if(!cfg) return NULL; 442 /* modifications for library use, less verbose, less memory */ 443 free(cfg->chrootdir); 444 cfg->chrootdir = NULL; 445 cfg->verbosity = 0; 446 cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable' 447 and probably within the ulimit(maxfds) of the user */ 448 cfg->outgoing_num_tcp = 2; 449 cfg->msg_cache_size = 1024*1024; 450 cfg->msg_cache_slabs = 1; 451 cfg->rrset_cache_size = 1024*1024; 452 cfg->rrset_cache_slabs = 1; 453 cfg->infra_cache_slabs = 1; 454 cfg->use_syslog = 0; 455 cfg->key_cache_size = 1024*1024; 456 cfg->key_cache_slabs = 1; 457 cfg->neg_cache_size = 100 * 1024; 458 cfg->donotquery_localhost = 0; /* allow, so that you can ask a 459 forward nameserver running on localhost */ 460 cfg->val_log_level = 2; /* to fill why_bogus with */ 461 cfg->val_log_squelch = 1; 462 cfg->minimal_responses = 0; 463 cfg->harden_short_bufsize = 1; 464 /* Need to explicitly define the slabs from their 0 default value */ 465 cfg->ip_ratelimit_slabs = 1; 466 cfg->ratelimit_slabs = 1; 467 cfg->dnscrypt_shared_secret_cache_slabs = 1; 468 cfg->dnscrypt_nonce_cache_slabs = 1; 469 return cfg; 470 } 471 472 /** check that the value passed is >= 0 */ 473 #define IS_NUMBER_OR_ZERO \ 474 if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0 475 /** check that the value passed is > 0 */ 476 #define IS_NONZERO_NUMBER \ 477 if(atoi(val) == 0) return 0 478 /** check that the value passed is not 0 and a power of 2 */ 479 #define IS_POW2_NUMBER \ 480 if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0 481 /** check that the value passed is yes or no */ 482 #define IS_YES_OR_NO \ 483 if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0 484 /** put integer_or_zero into variable */ 485 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 486 { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); } 487 /** put integer_nonzero into variable */ 488 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \ 489 { IS_NONZERO_NUMBER; cfg->var = atoi(val); } 490 /** put integer_or_zero into unsigned */ 491 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 492 { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); } 493 /** put integer_or_zero into size_t */ 494 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 495 { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); } 496 /** put integer_nonzero into size_t */ 497 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \ 498 { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); } 499 /** put yesno into variable */ 500 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \ 501 { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); } 502 /** put memsize into variable */ 503 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \ 504 { return cfg_parse_memsize(val, &cfg->var); } 505 /** put pow2 number into variable */ 506 #define S_POW2(str, var) if(strcmp(opt, str)==0) \ 507 { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); } 508 /** put string into variable */ 509 #define S_STR(str, var) if(strcmp(opt, str)==0) \ 510 { free(cfg->var); return (cfg->var = strdup(val)) != NULL; } 511 /** put string into strlist */ 512 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \ 513 { return cfg_strlist_insert(&cfg->var, strdup(val)); } 514 /** put string into strlist if not present yet*/ 515 #define S_STRLIST_UNIQ(str, var) if(strcmp(opt, str)==0) \ 516 { if(cfg_strlist_find(cfg->var, val)) { return 0;} \ 517 return cfg_strlist_insert(&cfg->var, strdup(val)); } 518 /** append string to strlist */ 519 #define S_STRLIST_APPEND(str, var) if(strcmp(opt, str)==0) \ 520 { return cfg_strlist_append(&cfg->var, strdup(val)); } 521 522 /** Set PROBE_MAXRTO based on current RTT_MAX_TIMEOUT 523 * (USEFUL_SERVER_TOP_TIMEOUT) configuration. */ 524 static int 525 probe_maxrto(int useful_server_top_timeout) { 526 return 527 PROBE_MAXRTO > useful_server_top_timeout 528 ?useful_server_top_timeout 529 :PROBE_MAXRTO_DEFAULT; 530 } 531 532 /** Apply the relevant changes that rely upon RTT_MAX_TIMEOUT */ 533 int config_apply_max_rtt(int max_rtt) 534 { 535 USEFUL_SERVER_TOP_TIMEOUT = max_rtt; 536 BLACKLIST_PENALTY = max_rtt*4; 537 PROBE_MAXRTO = probe_maxrto(max_rtt); 538 return max_rtt; 539 } 540 541 int config_set_option(struct config_file* cfg, const char* opt, 542 const char* val) 543 { 544 char buf[64]; 545 if(!opt) return 0; 546 if(opt[strlen(opt)-1] != ':' && strlen(opt)+2<sizeof(buf)) { 547 snprintf(buf, sizeof(buf), "%s:", opt); 548 opt = buf; 549 } 550 S_NUMBER_OR_ZERO("verbosity:", verbosity) 551 else if(strcmp(opt, "statistics-interval:") == 0) { 552 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0) 553 cfg->stat_interval = 0; 554 else if(atoi(val) == 0) 555 return 0; 556 else cfg->stat_interval = atoi(val); 557 } else if(strcmp(opt, "num-threads:") == 0) { 558 /* not supported, library must have 1 thread in bgworker */ 559 return 0; 560 } else if(strcmp(opt, "outgoing-port-permit:") == 0) { 561 return cfg_mark_ports(val, 1, 562 cfg->outgoing_avail_ports, 65536); 563 } else if(strcmp(opt, "outgoing-port-avoid:") == 0) { 564 return cfg_mark_ports(val, 0, 565 cfg->outgoing_avail_ports, 65536); 566 } else if(strcmp(opt, "local-zone:") == 0) { 567 return cfg_parse_local_zone(cfg, val); 568 } else if(strcmp(opt, "val-override-date:") == 0) { 569 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) { 570 cfg->val_date_override = 0; 571 } else if(strlen(val) == 14) { 572 cfg->val_date_override = cfg_convert_timeval(val); 573 return cfg->val_date_override != 0; 574 } else { 575 if(atoi(val) == 0) return 0; 576 cfg->val_date_override = (uint32_t)atoi(val); 577 } 578 } else if(strcmp(opt, "local-data-ptr:") == 0) { 579 char* ptr = cfg_ptr_reverse((char*)opt); 580 return cfg_strlist_insert(&cfg->local_data, ptr); 581 } else if(strcmp(opt, "logfile:") == 0) { 582 cfg->use_syslog = 0; 583 free(cfg->logfile); 584 return (cfg->logfile = strdup(val)) != NULL; 585 } 586 else if(strcmp(opt, "log-time-ascii:") == 0) 587 { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0); 588 log_set_time_asc(cfg->log_time_ascii); } 589 else if(strcmp(opt, "log-time-iso:") == 0) 590 { IS_YES_OR_NO; cfg->log_time_iso = (strcmp(val, "yes") == 0); 591 log_set_time_iso(cfg->log_time_iso); } 592 else S_SIZET_NONZERO("max-udp-size:", max_udp_size) 593 else S_YNO("use-syslog:", use_syslog) 594 else S_STR("log-identity:", log_identity) 595 else S_YNO("extended-statistics:", stat_extended) 596 else S_YNO("statistics-inhibit-zero:", stat_inhibit_zero) 597 else S_YNO("statistics-cumulative:", stat_cumulative) 598 else S_YNO("shm-enable:", shm_enable) 599 else S_NUMBER_OR_ZERO("shm-key:", shm_key) 600 else S_YNO("do-ip4:", do_ip4) 601 else S_YNO("do-ip6:", do_ip6) 602 else S_YNO("do-udp:", do_udp) 603 else S_YNO("do-tcp:", do_tcp) 604 else S_YNO("prefer-ip4:", prefer_ip4) 605 else S_YNO("prefer-ip6:", prefer_ip6) 606 else S_YNO("tcp-upstream:", tcp_upstream) 607 else S_YNO("udp-upstream-without-downstream:", 608 udp_upstream_without_downstream) 609 else S_NUMBER_NONZERO("tcp-mss:", tcp_mss) 610 else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss) 611 else S_NUMBER_NONZERO("tcp-auth-query-timeout:", tcp_auth_query_timeout) 612 else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout) 613 else S_NUMBER_NONZERO("max-reuse-tcp-queries:", max_reuse_tcp_queries) 614 else S_NUMBER_NONZERO("tcp-reuse-timeout:", tcp_reuse_timeout) 615 else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive) 616 else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout) 617 else S_NUMBER_OR_ZERO("sock-queue-timeout:", sock_queue_timeout) 618 else S_YNO("ssl-upstream:", ssl_upstream) 619 else S_YNO("tls-upstream:", ssl_upstream) 620 else S_STR("ssl-service-key:", ssl_service_key) 621 else S_STR("tls-service-key:", ssl_service_key) 622 else S_STR("ssl-service-pem:", ssl_service_pem) 623 else S_STR("tls-service-pem:", ssl_service_pem) 624 else S_NUMBER_NONZERO("ssl-port:", ssl_port) 625 else S_NUMBER_NONZERO("tls-port:", ssl_port) 626 else S_STR("ssl-cert-bundle:", tls_cert_bundle) 627 else S_STR("tls-cert-bundle:", tls_cert_bundle) 628 else S_YNO("tls-win-cert:", tls_win_cert) 629 else S_YNO("tls-system-cert:", tls_win_cert) 630 else S_STRLIST("additional-ssl-port:", tls_additional_port) 631 else S_STRLIST("additional-tls-port:", tls_additional_port) 632 else S_STRLIST("tls-additional-ports:", tls_additional_port) 633 else S_STRLIST("tls-additional-port:", tls_additional_port) 634 else S_STRLIST_APPEND("tls-session-ticket-keys:", tls_session_ticket_keys) 635 else S_STR("tls-ciphers:", tls_ciphers) 636 else S_STR("tls-ciphersuites:", tls_ciphersuites) 637 else S_YNO("tls-use-sni:", tls_use_sni) 638 else if(strcmp(opt, "tls-protocols:") == 0) { 639 if(!cfg_tls_protocols_is_valid(val)) return 0; 640 free(cfg->tls_protocols); 641 return (cfg->tls_protocols = strdup(val)) != NULL; 642 } 643 else S_NUMBER_NONZERO("https-port:", https_port) 644 else S_STR("http-endpoint:", http_endpoint) 645 else S_NUMBER_NONZERO("http-max-streams:", http_max_streams) 646 else S_MEMSIZE("http-query-buffer-size:", http_query_buffer_size) 647 else S_MEMSIZE("http-response-buffer-size:", http_response_buffer_size) 648 else S_YNO("http-nodelay:", http_nodelay) 649 else S_YNO("http-notls-downstream:", http_notls_downstream) 650 else S_NUMBER_NONZERO("quic-port:", quic_port) 651 else S_MEMSIZE("quic-size:", quic_size) 652 else S_YNO("interface-automatic:", if_automatic) 653 else S_STR("interface-automatic-ports:", if_automatic_ports) 654 else S_YNO("use-systemd:", use_systemd) 655 else S_YNO("do-daemonize:", do_daemonize) 656 else S_NUMBER_NONZERO("port:", port) 657 else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports) 658 else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp) 659 else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp) 660 else S_MEMSIZE("stream-wait-size:", stream_wait_size) 661 else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size) 662 else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size) 663 else S_MEMSIZE("msg-cache-size:", msg_cache_size) 664 else S_POW2("msg-cache-slabs:", msg_cache_slabs) 665 else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread) 666 else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time) 667 else S_MEMSIZE("so-rcvbuf:", so_rcvbuf) 668 else S_MEMSIZE("so-sndbuf:", so_sndbuf) 669 else S_YNO("so-reuseport:", so_reuseport) 670 else S_YNO("ip-transparent:", ip_transparent) 671 else S_YNO("ip-freebind:", ip_freebind) 672 else S_NUMBER_OR_ZERO("ip-dscp:", ip_dscp) 673 else S_MEMSIZE("rrset-cache-size:", rrset_cache_size) 674 else S_POW2("rrset-cache-slabs:", rrset_cache_slabs) 675 else S_YNO("prefetch:", prefetch) 676 else S_YNO("prefetch-key:", prefetch_key) 677 else S_YNO("deny-any:", deny_any) 678 else if(strcmp(opt, "cache-max-ttl:") == 0) 679 { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;} 680 else if(strcmp(opt, "cache-max-negative-ttl:") == 0) 681 { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;} 682 else if(strcmp(opt, "cache-min-negative-ttl:") == 0) 683 { IS_NUMBER_OR_ZERO; cfg->min_negative_ttl = atoi(val); MIN_NEG_TTL=(time_t)cfg->min_negative_ttl;} 684 else if(strcmp(opt, "cache-min-ttl:") == 0) 685 { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;} 686 else if(strcmp(opt, "infra-cache-min-rtt:") == 0) { 687 IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val); 688 RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt; 689 } 690 else if(strcmp(opt, "infra-cache-max-rtt:") == 0) { 691 IS_NUMBER_OR_ZERO; cfg->infra_cache_max_rtt = atoi(val); 692 RTT_MAX_TIMEOUT=config_apply_max_rtt(cfg->infra_cache_max_rtt); 693 } 694 else S_YNO("infra-keep-probing:", infra_keep_probing) 695 else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl) 696 else S_POW2("infra-cache-slabs:", infra_cache_slabs) 697 else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts) 698 else S_NUMBER_OR_ZERO("delay-close:", delay_close) 699 else S_YNO("udp-connect:", udp_connect) 700 else S_STR("chroot:", chrootdir) 701 else S_STR("username:", username) 702 else S_STR("directory:", directory) 703 else S_STR("pidfile:", pidfile) 704 else S_YNO("hide-identity:", hide_identity) 705 else S_YNO("hide-version:", hide_version) 706 else S_YNO("hide-trustanchor:", hide_trustanchor) 707 else S_YNO("hide-http-user-agent:", hide_http_user_agent) 708 else S_STR("identity:", identity) 709 else S_STR("version:", version) 710 else S_STR("http-user-agent:", http_user_agent) 711 else if(strcmp(opt, "nsid:") == 0) { 712 free(cfg->nsid_cfg_str); 713 if (!(cfg->nsid_cfg_str = strdup(val))) 714 return 0; 715 /* Empty string is just validly unsetting nsid */ 716 if (*val == 0) { 717 free(cfg->nsid); 718 cfg->nsid = NULL; 719 cfg->nsid_len = 0; 720 return 1; 721 } 722 cfg->nsid = cfg_parse_nsid(val, &cfg->nsid_len); 723 return cfg->nsid != NULL; 724 } 725 else S_STRLIST("root-hints:", root_hints) 726 else S_STR("target-fetch-policy:", target_fetch_policy) 727 else S_YNO("harden-glue:", harden_glue) 728 else S_YNO("harden-unverified-glue:", harden_unverified_glue) 729 else S_YNO("harden-short-bufsize:", harden_short_bufsize) 730 else S_YNO("harden-large-queries:", harden_large_queries) 731 else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped) 732 else S_YNO("harden-below-nxdomain:", harden_below_nxdomain) 733 else S_YNO("harden-referral-path:", harden_referral_path) 734 else S_YNO("harden-algo-downgrade:", harden_algo_downgrade) 735 else S_YNO("harden-unknown-additional:", harden_unknown_additional) 736 else S_YNO("use-caps-for-id:", use_caps_bits_for_id) 737 else S_STRLIST("caps-whitelist:", caps_whitelist) 738 else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold) 739 else S_STRLIST("private-address:", private_address) 740 else S_STRLIST("private-domain:", private_domain) 741 else S_YNO("do-not-query-localhost:", donotquery_localhost) 742 else S_STRLIST("do-not-query-address:", donotqueryaddrs) 743 else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list) 744 else S_STRLIST("trust-anchor-file:", trust_anchor_file_list) 745 else S_STRLIST("trust-anchor:", trust_anchor_list) 746 else S_STRLIST("trusted-keys-file:", trusted_keys_file_list) 747 else S_YNO("trust-anchor-signaling:", trust_anchor_signaling) 748 else S_YNO("root-key-sentinel:", root_key_sentinel) 749 else S_STRLIST("domain-insecure:", domain_insecure) 750 else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl) 751 else S_YNO("val-clean-additional:", val_clean_additional) 752 else S_NUMBER_OR_ZERO("val-log-level:", val_log_level) 753 else S_YNO("val-log-squelch:", val_log_squelch) 754 else S_YNO("log-queries:", log_queries) 755 else S_YNO("log-replies:", log_replies) 756 else S_YNO("log-tag-queryreply:", log_tag_queryreply) 757 else S_YNO("log-local-actions:", log_local_actions) 758 else S_YNO("log-servfail:", log_servfail) 759 else S_YNO("log-destaddr:", log_destaddr) 760 else S_YNO("log-thread-id:", log_thread_id) 761 else S_YNO("val-permissive-mode:", val_permissive_mode) 762 else S_YNO("aggressive-nsec:", aggressive_nsec) 763 else S_YNO("ignore-cd-flag:", ignore_cd) 764 else S_YNO("disable-edns-do:", disable_edns_do) 765 else if(strcmp(opt, "serve-expired:") == 0) 766 { IS_YES_OR_NO; cfg->serve_expired = (strcmp(val, "yes") == 0); 767 SERVE_EXPIRED = cfg->serve_expired; } 768 else if(strcmp(opt, "serve-expired-ttl:") == 0) 769 { IS_NUMBER_OR_ZERO; cfg->serve_expired_ttl = atoi(val); SERVE_EXPIRED_TTL=(time_t)cfg->serve_expired_ttl;} 770 else if(strcmp(opt, "serve-expired-ttl-reset:") == 0) 771 { IS_YES_OR_NO; cfg->serve_expired_ttl_reset = (strcmp(val, "yes") == 0); 772 SERVE_EXPIRED_TTL_RESET = cfg->serve_expired_ttl_reset; } 773 else if(strcmp(opt, "serve-expired-reply-ttl:") == 0) 774 { IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;} 775 else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout) 776 else S_YNO("ede:", ede) 777 else S_YNO("ede-serve-expired:", ede_serve_expired) 778 else S_YNO("dns-error-reporting:", dns_error_reporting) 779 else S_NUMBER_OR_ZERO("iter-scrub-ns:", iter_scrub_ns) 780 else S_NUMBER_OR_ZERO("iter-scrub-cname:", iter_scrub_cname) 781 else S_NUMBER_OR_ZERO("iter-scrub-rrsig:", iter_scrub_rrsig) 782 else S_YNO("iter-scrub-promiscuous:", iter_scrub_promiscuous) 783 else S_NUMBER_OR_ZERO("max-global-quota:", max_global_quota) 784 else S_YNO("serve-original-ttl:", serve_original_ttl) 785 else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations) 786 else S_YNO("zonemd-permissive-mode:", zonemd_permissive_mode) 787 else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown) 788 else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown) 789 else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing) 790 else if(strcmp(opt, "permit-small-holddown:") == 0) 791 { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0); 792 autr_permit_small_holddown = cfg->permit_small_holddown; } 793 else S_MEMSIZE("key-cache-size:", key_cache_size) 794 else S_POW2("key-cache-slabs:", key_cache_slabs) 795 else S_MEMSIZE("neg-cache-size:", neg_cache_size) 796 else S_YNO("minimal-responses:", minimal_responses) 797 else S_YNO("rrset-roundrobin:", rrset_roundrobin) 798 else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit) 799 else S_NUMBER_OR_ZERO("discard-timeout:", discard_timeout) 800 else S_NUMBER_OR_ZERO("wait-limit:", wait_limit) 801 else S_NUMBER_OR_ZERO("wait-limit-cookie:", wait_limit_cookie) 802 else S_STRLIST("local-data:", local_data) 803 else S_YNO("unblock-lan-zones:", unblock_lan_zones) 804 else S_YNO("insecure-lan-zones:", insecure_lan_zones) 805 else S_YNO("control-enable:", remote_control_enable) 806 else S_STRLIST_APPEND("control-interface:", control_ifs) 807 else S_NUMBER_NONZERO("control-port:", control_port) 808 else S_STR("server-key-file:", server_key_file) 809 else S_STR("server-cert-file:", server_cert_file) 810 else S_STR("control-key-file:", control_key_file) 811 else S_STR("control-cert-file:", control_cert_file) 812 else S_STR("module-config:", module_conf) 813 else S_STRLIST("python-script:", python_script) 814 else S_STRLIST("dynlib-file:", dynlib_file) 815 else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check) 816 #ifdef CLIENT_SUBNET 817 /* Can't set max subnet prefix here, since that value is used when 818 * generating the address tree. */ 819 /* No client-subnet-always-forward here, module registration depends on 820 * this option. */ 821 #endif 822 #ifdef USE_DNSTAP 823 else S_YNO("dnstap-enable:", dnstap) 824 else S_YNO("dnstap-bidirectional:", dnstap_bidirectional) 825 else S_STR("dnstap-socket-path:", dnstap_socket_path) 826 else S_STR("dnstap-ip:", dnstap_ip) 827 else S_YNO("dnstap-tls:", dnstap_tls) 828 else S_STR("dnstap-tls-server-name:", dnstap_tls_server_name) 829 else S_STR("dnstap-tls-cert-bundle:", dnstap_tls_cert_bundle) 830 else S_STR("dnstap-tls-client-key-file:", dnstap_tls_client_key_file) 831 else S_STR("dnstap-tls-client-cert-file:", 832 dnstap_tls_client_cert_file) 833 else S_YNO("dnstap-send-identity:", dnstap_send_identity) 834 else S_YNO("dnstap-send-version:", dnstap_send_version) 835 else S_STR("dnstap-identity:", dnstap_identity) 836 else S_STR("dnstap-version:", dnstap_version) 837 else S_NUMBER_OR_ZERO("dnstap-sample-rate:", dnstap_sample_rate) 838 else S_YNO("dnstap-log-resolver-query-messages:", 839 dnstap_log_resolver_query_messages) 840 else S_YNO("dnstap-log-resolver-response-messages:", 841 dnstap_log_resolver_response_messages) 842 else S_YNO("dnstap-log-client-query-messages:", 843 dnstap_log_client_query_messages) 844 else S_YNO("dnstap-log-client-response-messages:", 845 dnstap_log_client_response_messages) 846 else S_YNO("dnstap-log-forwarder-query-messages:", 847 dnstap_log_forwarder_query_messages) 848 else S_YNO("dnstap-log-forwarder-response-messages:", 849 dnstap_log_forwarder_response_messages) 850 #endif 851 #ifdef USE_DNSCRYPT 852 else S_YNO("dnscrypt-enable:", dnscrypt) 853 else S_NUMBER_NONZERO("dnscrypt-port:", dnscrypt_port) 854 else S_STR("dnscrypt-provider:", dnscrypt_provider) 855 else S_STRLIST_UNIQ("dnscrypt-provider-cert:", dnscrypt_provider_cert) 856 else S_STRLIST("dnscrypt-provider-cert-rotated:", dnscrypt_provider_cert_rotated) 857 else S_STRLIST_UNIQ("dnscrypt-secret-key:", dnscrypt_secret_key) 858 else S_MEMSIZE("dnscrypt-shared-secret-cache-size:", 859 dnscrypt_shared_secret_cache_size) 860 else S_POW2("dnscrypt-shared-secret-cache-slabs:", 861 dnscrypt_shared_secret_cache_slabs) 862 else S_MEMSIZE("dnscrypt-nonce-cache-size:", 863 dnscrypt_nonce_cache_size) 864 else S_POW2("dnscrypt-nonce-cache-slabs:", 865 dnscrypt_nonce_cache_slabs) 866 #endif 867 else if(strcmp(opt, "ip-ratelimit-cookie:") == 0) { 868 IS_NUMBER_OR_ZERO; cfg->ip_ratelimit_cookie = atoi(val); 869 infra_ip_ratelimit_cookie=cfg->ip_ratelimit_cookie; 870 } 871 else if(strcmp(opt, "ip-ratelimit:") == 0) { 872 IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val); 873 infra_ip_ratelimit=cfg->ip_ratelimit; 874 } 875 else if(strcmp(opt, "ratelimit:") == 0) { 876 IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val); 877 infra_dp_ratelimit=cfg->ratelimit; 878 } 879 else S_MEMSIZE("ip-ratelimit-size:", ip_ratelimit_size) 880 else S_MEMSIZE("ratelimit-size:", ratelimit_size) 881 else S_POW2("ip-ratelimit-slabs:", ip_ratelimit_slabs) 882 else S_POW2("ratelimit-slabs:", ratelimit_slabs) 883 else S_NUMBER_OR_ZERO("ip-ratelimit-factor:", ip_ratelimit_factor) 884 else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor) 885 else S_YNO("ip-ratelimit-backoff:", ip_ratelimit_backoff) 886 else S_YNO("ratelimit-backoff:", ratelimit_backoff) 887 else S_NUMBER_NONZERO("outbound-msg-retry:", outbound_msg_retry) 888 else S_NUMBER_NONZERO("max-sent-count:", max_sent_count) 889 else S_NUMBER_NONZERO("max-query-restarts:", max_query_restarts) 890 else S_SIZET_NONZERO("fast-server-num:", fast_server_num) 891 else S_NUMBER_OR_ZERO("fast-server-permil:", fast_server_permil) 892 else S_YNO("qname-minimisation:", qname_minimisation) 893 else S_YNO("qname-minimisation-strict:", qname_minimisation_strict) 894 else S_YNO("pad-responses:", pad_responses) 895 else S_SIZET_NONZERO("pad-responses-block-size:", pad_responses_block_size) 896 else S_YNO("pad-queries:", pad_queries) 897 else S_SIZET_NONZERO("pad-queries-block-size:", pad_queries_block_size) 898 else S_STRLIST("proxy-protocol-port:", proxy_protocol_port) 899 #ifdef USE_IPSECMOD 900 else S_YNO("ipsecmod-enabled:", ipsecmod_enabled) 901 else S_YNO("ipsecmod-ignore-bogus:", ipsecmod_ignore_bogus) 902 else if(strcmp(opt, "ipsecmod-max-ttl:") == 0) 903 { IS_NUMBER_OR_ZERO; cfg->ipsecmod_max_ttl = atoi(val); } 904 else S_YNO("ipsecmod-strict:", ipsecmod_strict) 905 #endif 906 else S_YNO("answer-cookie:", do_answer_cookie) 907 else S_STR("cookie-secret-file:", cookie_secret_file) 908 #ifdef USE_CACHEDB 909 else S_YNO("cachedb-no-store:", cachedb_no_store) 910 else S_YNO("cachedb-check-when-serve-expired:", cachedb_check_when_serve_expired) 911 #endif /* USE_CACHEDB */ 912 else if(strcmp(opt, "define-tag:") ==0) { 913 return config_add_tag(cfg, val); 914 /* val_sig_skew_min, max and val_max_restart are copied into val_env 915 * during init so this does not update val_env with set_option */ 916 } else if(strcmp(opt, "val-sig-skew-min:") == 0) 917 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); } 918 else if(strcmp(opt, "val-sig-skew-max:") == 0) 919 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); } 920 else if(strcmp(opt, "val-max-restart:") == 0) 921 { IS_NUMBER_OR_ZERO; cfg->val_max_restart = (int32_t)atoi(val); } 922 else if (strcmp(opt, "outgoing-interface:") == 0) { 923 char* d = strdup(val); 924 char** oi = 925 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*)); 926 if(!d || !oi) { free(d); free(oi); return -1; } 927 if(cfg->out_ifs && cfg->num_out_ifs) { 928 memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*)); 929 free(cfg->out_ifs); 930 } 931 oi[cfg->num_out_ifs++] = d; 932 cfg->out_ifs = oi; 933 } else { 934 /* unknown or unsupported (from the set_option interface): 935 * interface, outgoing-interface, access-control, 936 * stub-zone, name, stub-addr, stub-host, stub-prime 937 * forward-first, stub-first, forward-ssl-upstream, 938 * stub-ssl-upstream, forward-zone, auth-zone 939 * name, forward-addr, forward-host, 940 * ratelimit-for-domain, ratelimit-below-domain, 941 * local-zone-tag, access-control-view, interface-*, 942 * send-client-subnet, client-subnet-always-forward, 943 * max-client-subnet-ipv4, max-client-subnet-ipv6, 944 * min-client-subnet-ipv4, min-client-subnet-ipv6, 945 * max-ecs-tree-size-ipv4, max-ecs-tree-size-ipv6, ipsecmod_hook, 946 * ipsecmod_whitelist. */ 947 return 0; 948 } 949 return 1; 950 } 951 952 void config_print_func(char* line, void* arg) 953 { 954 FILE* f = (FILE*)arg; 955 (void)fprintf(f, "%s\n", line); 956 } 957 958 /** collate func arg */ 959 struct config_collate_arg { 960 /** list of result items */ 961 struct config_strlist_head list; 962 /** if a malloc error occurred, 0 is OK */ 963 int status; 964 }; 965 966 void config_collate_func(char* line, void* arg) 967 { 968 struct config_collate_arg* m = (struct config_collate_arg*)arg; 969 if(m->status) 970 return; 971 if(!cfg_strlist_append(&m->list, strdup(line))) 972 m->status = 1; 973 } 974 975 int config_get_option_list(struct config_file* cfg, const char* opt, 976 struct config_strlist** list) 977 { 978 struct config_collate_arg m; 979 memset(&m, 0, sizeof(m)); 980 *list = NULL; 981 if(!config_get_option(cfg, opt, config_collate_func, &m)) 982 return 1; 983 if(m.status) { 984 config_delstrlist(m.list.first); 985 return 2; 986 } 987 *list = m.list.first; 988 return 0; 989 } 990 991 int 992 config_get_option_collate(struct config_file* cfg, const char* opt, char** str) 993 { 994 struct config_strlist* list = NULL; 995 int r; 996 *str = NULL; 997 if((r = config_get_option_list(cfg, opt, &list)) != 0) 998 return r; 999 *str = config_collate_cat(list); 1000 config_delstrlist(list); 1001 if(!*str) return 2; 1002 return 0; 1003 } 1004 1005 char* 1006 config_collate_cat(struct config_strlist* list) 1007 { 1008 size_t total = 0, left; 1009 struct config_strlist* s; 1010 char *r, *w; 1011 if(!list) /* no elements */ 1012 return strdup(""); 1013 if(list->next == NULL) /* one element , no newline at end. */ 1014 return strdup(list->str); 1015 /* count total length */ 1016 for(s=list; s; s=s->next) 1017 total += strlen(s->str) + 1; /* len + newline */ 1018 left = total+1; /* one extra for nul at end */ 1019 r = malloc(left); 1020 if(!r) 1021 return NULL; 1022 w = r; 1023 for(s=list; s; s=s->next) { 1024 size_t this = strlen(s->str); 1025 if(this+2 > left) { /* sanity check */ 1026 free(r); 1027 return NULL; 1028 } 1029 snprintf(w, left, "%s\n", s->str); 1030 this = strlen(w); 1031 w += this; 1032 left -= this; 1033 } 1034 return r; 1035 } 1036 1037 /** compare and print decimal option */ 1038 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \ 1039 {snprintf(buf, len, "%d", (int)cfg->var); \ 1040 func(buf, arg);} 1041 /** compare and print unsigned option */ 1042 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \ 1043 {snprintf(buf, len, "%u", (unsigned)cfg->var); \ 1044 func(buf, arg);} 1045 /** compare and print yesno option */ 1046 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \ 1047 {func(cfg->var?"yes":"no", arg);} 1048 /** compare and print string option */ 1049 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \ 1050 {func(cfg->var?cfg->var:"", arg);} 1051 /** compare and print array option */ 1052 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \ 1053 {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);} 1054 /** compare and print memorysize option */ 1055 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \ 1056 if(cfg->var > 1024*1024*1024) { \ 1057 size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \ 1058 snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \ 1059 } else snprintf(buf, len, "%u", (unsigned)cfg->var); \ 1060 func(buf, arg);} 1061 /** compare and print list option */ 1062 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \ 1063 struct config_strlist* p = cfg->lst; \ 1064 for(p = cfg->lst; p; p = p->next) \ 1065 func(p->str, arg); \ 1066 } 1067 /** compare and print list option */ 1068 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \ 1069 struct config_str2list* p = cfg->lst; \ 1070 for(p = cfg->lst; p; p = p->next) { \ 1071 snprintf(buf, len, "%s %s", p->str, p->str2); \ 1072 func(buf, arg); \ 1073 } \ 1074 } 1075 /** compare and print list option */ 1076 #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \ 1077 struct config_str3list* p = cfg->lst; \ 1078 for(p = cfg->lst; p; p = p->next) { \ 1079 snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \ 1080 func(buf, arg); \ 1081 } \ 1082 } 1083 /** compare and print taglist option */ 1084 #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \ 1085 char* tmpstr = NULL; \ 1086 struct config_strbytelist *p = cfg->lst; \ 1087 for(p = cfg->lst; p; p = p->next) {\ 1088 tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \ 1089 if(tmpstr) {\ 1090 snprintf(buf, len, "%s %s", p->str, tmpstr); \ 1091 func(buf, arg); \ 1092 free(tmpstr); \ 1093 } \ 1094 } \ 1095 } 1096 1097 int 1098 config_get_option(struct config_file* cfg, const char* opt, 1099 void (*func)(char*,void*), void* arg) 1100 { 1101 char buf[1024], nopt[64]; 1102 size_t len = sizeof(buf); 1103 if(!opt) return 0; 1104 if(opt && opt[strlen(opt)-1] == ':' && strlen(opt)<sizeof(nopt)) { 1105 memmove(nopt, opt, strlen(opt)); 1106 nopt[strlen(opt)-1] = 0; 1107 opt = nopt; 1108 } 1109 fptr_ok(fptr_whitelist_print_func(func)); 1110 O_DEC(opt, "verbosity", verbosity) 1111 else O_DEC(opt, "statistics-interval", stat_interval) 1112 else O_YNO(opt, "statistics-cumulative", stat_cumulative) 1113 else O_YNO(opt, "extended-statistics", stat_extended) 1114 else O_YNO(opt, "statistics-inhibit-zero", stat_inhibit_zero) 1115 else O_YNO(opt, "shm-enable", shm_enable) 1116 else O_DEC(opt, "shm-key", shm_key) 1117 else O_YNO(opt, "use-syslog", use_syslog) 1118 else O_STR(opt, "log-identity", log_identity) 1119 else O_YNO(opt, "log-time-ascii", log_time_ascii) 1120 else O_YNO(opt, "log-time-iso", log_time_iso) 1121 else O_DEC(opt, "num-threads", num_threads) 1122 else O_IFC(opt, "interface", num_ifs, ifs) 1123 else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs) 1124 else O_YNO(opt, "interface-automatic", if_automatic) 1125 else O_STR(opt, "interface-automatic-ports", if_automatic_ports) 1126 else O_DEC(opt, "port", port) 1127 else O_DEC(opt, "outgoing-range", outgoing_num_ports) 1128 else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp) 1129 else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp) 1130 else O_MEM(opt, "stream-wait-size", stream_wait_size) 1131 else O_DEC(opt, "edns-buffer-size", edns_buffer_size) 1132 else O_DEC(opt, "msg-buffer-size", msg_buffer_size) 1133 else O_MEM(opt, "msg-cache-size", msg_cache_size) 1134 else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs) 1135 else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread) 1136 else O_UNS(opt, "jostle-timeout", jostle_time) 1137 else O_MEM(opt, "so-rcvbuf", so_rcvbuf) 1138 else O_MEM(opt, "so-sndbuf", so_sndbuf) 1139 else O_YNO(opt, "so-reuseport", so_reuseport) 1140 else O_YNO(opt, "ip-transparent", ip_transparent) 1141 else O_YNO(opt, "ip-freebind", ip_freebind) 1142 else O_DEC(opt, "ip-dscp", ip_dscp) 1143 else O_MEM(opt, "rrset-cache-size", rrset_cache_size) 1144 else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs) 1145 else O_YNO(opt, "prefetch-key", prefetch_key) 1146 else O_YNO(opt, "prefetch", prefetch) 1147 else O_YNO(opt, "deny-any", deny_any) 1148 else O_DEC(opt, "cache-max-ttl", max_ttl) 1149 else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl) 1150 else O_DEC(opt, "cache-min-negative-ttl", min_negative_ttl) 1151 else O_DEC(opt, "cache-min-ttl", min_ttl) 1152 else O_DEC(opt, "infra-host-ttl", host_ttl) 1153 else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs) 1154 else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt) 1155 else O_UNS(opt, "infra-cache-max-rtt", infra_cache_max_rtt) 1156 else O_YNO(opt, "infra-keep-probing", infra_keep_probing) 1157 else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts) 1158 else O_UNS(opt, "delay-close", delay_close) 1159 else O_YNO(opt, "udp-connect", udp_connect) 1160 else O_YNO(opt, "do-ip4", do_ip4) 1161 else O_YNO(opt, "do-ip6", do_ip6) 1162 else O_YNO(opt, "do-udp", do_udp) 1163 else O_YNO(opt, "do-tcp", do_tcp) 1164 else O_YNO(opt, "prefer-ip4", prefer_ip4) 1165 else O_YNO(opt, "prefer-ip6", prefer_ip6) 1166 else O_YNO(opt, "tcp-upstream", tcp_upstream) 1167 else O_YNO(opt, "udp-upstream-without-downstream", udp_upstream_without_downstream) 1168 else O_DEC(opt, "tcp-mss", tcp_mss) 1169 else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss) 1170 else O_DEC(opt, "tcp-auth-query-timeout", tcp_auth_query_timeout) 1171 else O_DEC(opt, "tcp-idle-timeout", tcp_idle_timeout) 1172 else O_DEC(opt, "max-reuse-tcp-queries", max_reuse_tcp_queries) 1173 else O_DEC(opt, "tcp-reuse-timeout", tcp_reuse_timeout) 1174 else O_YNO(opt, "edns-tcp-keepalive", do_tcp_keepalive) 1175 else O_DEC(opt, "edns-tcp-keepalive-timeout", tcp_keepalive_timeout) 1176 else O_DEC(opt, "sock-queue-timeout", sock_queue_timeout) 1177 else O_YNO(opt, "ssl-upstream", ssl_upstream) 1178 else O_YNO(opt, "tls-upstream", ssl_upstream) 1179 else O_STR(opt, "ssl-service-key", ssl_service_key) 1180 else O_STR(opt, "tls-service-key", ssl_service_key) 1181 else O_STR(opt, "ssl-service-pem", ssl_service_pem) 1182 else O_STR(opt, "tls-service-pem", ssl_service_pem) 1183 else O_DEC(opt, "ssl-port", ssl_port) 1184 else O_DEC(opt, "tls-port", ssl_port) 1185 else O_STR(opt, "ssl-cert-bundle", tls_cert_bundle) 1186 else O_STR(opt, "tls-cert-bundle", tls_cert_bundle) 1187 else O_YNO(opt, "tls-win-cert", tls_win_cert) 1188 else O_YNO(opt, "tls-system-cert", tls_win_cert) 1189 else O_LST(opt, "additional-ssl-port", tls_additional_port) 1190 else O_LST(opt, "additional-tls-port", tls_additional_port) 1191 else O_LST(opt, "tls-additional-ports", tls_additional_port) 1192 else O_LST(opt, "tls-additional-port", tls_additional_port) 1193 else O_LST(opt, "tls-session-ticket-keys", tls_session_ticket_keys.first) 1194 else O_STR(opt, "tls-ciphers", tls_ciphers) 1195 else O_STR(opt, "tls-ciphersuites", tls_ciphersuites) 1196 else O_YNO(opt, "tls-use-sni", tls_use_sni) 1197 else O_STR(opt, "tls-protocols", tls_protocols) 1198 else O_DEC(opt, "https-port", https_port) 1199 else O_STR(opt, "http-endpoint", http_endpoint) 1200 else O_UNS(opt, "http-max-streams", http_max_streams) 1201 else O_MEM(opt, "http-query-buffer-size", http_query_buffer_size) 1202 else O_MEM(opt, "http-response-buffer-size", http_response_buffer_size) 1203 else O_YNO(opt, "http-nodelay", http_nodelay) 1204 else O_YNO(opt, "http-notls-downstream", http_notls_downstream) 1205 else O_DEC(opt, "quic-port", quic_port) 1206 else O_MEM(opt, "quic-size", quic_size) 1207 else O_YNO(opt, "use-systemd", use_systemd) 1208 else O_YNO(opt, "do-daemonize", do_daemonize) 1209 else O_STR(opt, "chroot", chrootdir) 1210 else O_STR(opt, "username", username) 1211 else O_STR(opt, "directory", directory) 1212 else O_STR(opt, "logfile", logfile) 1213 else O_YNO(opt, "log-queries", log_queries) 1214 else O_YNO(opt, "log-replies", log_replies) 1215 else O_YNO(opt, "log-tag-queryreply", log_tag_queryreply) 1216 else O_YNO(opt, "log-local-actions", log_local_actions) 1217 else O_YNO(opt, "log-servfail", log_servfail) 1218 else O_YNO(opt, "log-destaddr", log_destaddr) 1219 else O_YNO(opt, "log-thread-id", log_thread_id) 1220 else O_STR(opt, "pidfile", pidfile) 1221 else O_YNO(opt, "hide-identity", hide_identity) 1222 else O_YNO(opt, "hide-version", hide_version) 1223 else O_YNO(opt, "hide-trustanchor", hide_trustanchor) 1224 else O_YNO(opt, "hide-http-user-agent", hide_http_user_agent) 1225 else O_STR(opt, "identity", identity) 1226 else O_STR(opt, "version", version) 1227 else O_STR(opt, "http-user-agent", http_user_agent) 1228 else O_STR(opt, "nsid", nsid_cfg_str) 1229 else O_STR(opt, "target-fetch-policy", target_fetch_policy) 1230 else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize) 1231 else O_YNO(opt, "harden-large-queries", harden_large_queries) 1232 else O_YNO(opt, "harden-glue", harden_glue) 1233 else O_YNO(opt, "harden-unverified-glue", harden_unverified_glue) 1234 else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped) 1235 else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain) 1236 else O_YNO(opt, "harden-referral-path", harden_referral_path) 1237 else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade) 1238 else O_YNO(opt, "harden-unknown-additional", harden_unknown_additional) 1239 else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id) 1240 else O_LST(opt, "caps-whitelist", caps_whitelist) 1241 else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold) 1242 else O_YNO(opt, "do-not-query-localhost", donotquery_localhost) 1243 else O_STR(opt, "module-config", module_conf) 1244 else O_DEC(opt, "val-bogus-ttl", bogus_ttl) 1245 else O_YNO(opt, "val-clean-additional", val_clean_additional) 1246 else O_DEC(opt, "val-log-level", val_log_level) 1247 else O_YNO(opt, "val-permissive-mode", val_permissive_mode) 1248 else O_YNO(opt, "aggressive-nsec", aggressive_nsec) 1249 else O_YNO(opt, "ignore-cd-flag", ignore_cd) 1250 else O_YNO(opt, "disable-edns-do", disable_edns_do) 1251 else O_YNO(opt, "serve-expired", serve_expired) 1252 else O_DEC(opt, "serve-expired-ttl", serve_expired_ttl) 1253 else O_YNO(opt, "serve-expired-ttl-reset", serve_expired_ttl_reset) 1254 else O_DEC(opt, "serve-expired-reply-ttl", serve_expired_reply_ttl) 1255 else O_DEC(opt, "serve-expired-client-timeout", serve_expired_client_timeout) 1256 else O_YNO(opt, "ede", ede) 1257 else O_YNO(opt, "ede-serve-expired", ede_serve_expired) 1258 else O_YNO(opt, "dns-error-reporting", dns_error_reporting) 1259 else O_DEC(opt, "iter-scrub-ns", iter_scrub_ns) 1260 else O_DEC(opt, "iter-scrub-cname", iter_scrub_cname) 1261 else O_DEC(opt, "iter-scrub-rrsig", iter_scrub_rrsig) 1262 else O_YNO(opt, "iter-scrub-promiscuous", iter_scrub_promiscuous) 1263 else O_DEC(opt, "max-global-quota", max_global_quota) 1264 else O_YNO(opt, "serve-original-ttl", serve_original_ttl) 1265 else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations) 1266 else O_YNO(opt, "zonemd-permissive-mode", zonemd_permissive_mode) 1267 else O_UNS(opt, "add-holddown", add_holddown) 1268 else O_UNS(opt, "del-holddown", del_holddown) 1269 else O_UNS(opt, "keep-missing", keep_missing) 1270 else O_YNO(opt, "permit-small-holddown", permit_small_holddown) 1271 else O_MEM(opt, "key-cache-size", key_cache_size) 1272 else O_DEC(opt, "key-cache-slabs", key_cache_slabs) 1273 else O_MEM(opt, "neg-cache-size", neg_cache_size) 1274 else O_YNO(opt, "control-enable", remote_control_enable) 1275 else O_DEC(opt, "control-port", control_port) 1276 else O_STR(opt, "server-key-file", server_key_file) 1277 else O_STR(opt, "server-cert-file", server_cert_file) 1278 else O_STR(opt, "control-key-file", control_key_file) 1279 else O_STR(opt, "control-cert-file", control_cert_file) 1280 else O_LST(opt, "root-hints", root_hints) 1281 else O_LS2(opt, "access-control", acls) 1282 else O_LS2(opt, "tcp-connection-limit", tcp_connection_limits) 1283 else O_LST(opt, "do-not-query-address", donotqueryaddrs) 1284 else O_LST(opt, "private-address", private_address) 1285 else O_LST(opt, "private-domain", private_domain) 1286 else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list) 1287 else O_LST(opt, "trust-anchor-file", trust_anchor_file_list) 1288 else O_LST(opt, "trust-anchor", trust_anchor_list) 1289 else O_LST(opt, "trusted-keys-file", trusted_keys_file_list) 1290 else O_YNO(opt, "trust-anchor-signaling", trust_anchor_signaling) 1291 else O_YNO(opt, "root-key-sentinel", root_key_sentinel) 1292 else O_LST(opt, "control-interface", control_ifs.first) 1293 else O_LST(opt, "domain-insecure", domain_insecure) 1294 else O_UNS(opt, "val-override-date", val_date_override) 1295 else O_YNO(opt, "minimal-responses", minimal_responses) 1296 else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin) 1297 else O_DEC(opt, "unknown-server-time-limit", unknown_server_time_limit) 1298 else O_DEC(opt, "discard-timeout", discard_timeout) 1299 else O_DEC(opt, "wait-limit", wait_limit) 1300 else O_DEC(opt, "wait-limit-cookie", wait_limit_cookie) 1301 else O_LS2(opt, "wait-limit-netblock", wait_limit_netblock) 1302 else O_LS2(opt, "wait-limit-cookie-netblock", wait_limit_cookie_netblock) 1303 #ifdef CLIENT_SUBNET 1304 else O_LST(opt, "send-client-subnet", client_subnet) 1305 else O_LST(opt, "client-subnet-zone", client_subnet_zone) 1306 else O_DEC(opt, "max-client-subnet-ipv4", max_client_subnet_ipv4) 1307 else O_DEC(opt, "max-client-subnet-ipv6", max_client_subnet_ipv6) 1308 else O_DEC(opt, "min-client-subnet-ipv4", min_client_subnet_ipv4) 1309 else O_DEC(opt, "min-client-subnet-ipv6", min_client_subnet_ipv6) 1310 else O_DEC(opt, "max-ecs-tree-size-ipv4", max_ecs_tree_size_ipv4) 1311 else O_DEC(opt, "max-ecs-tree-size-ipv6", max_ecs_tree_size_ipv6) 1312 else O_YNO(opt, "client-subnet-always-forward:", 1313 client_subnet_always_forward) 1314 #endif 1315 #ifdef USE_DNSTAP 1316 else O_YNO(opt, "dnstap-enable", dnstap) 1317 else O_YNO(opt, "dnstap-bidirectional", dnstap_bidirectional) 1318 else O_STR(opt, "dnstap-socket-path", dnstap_socket_path) 1319 else O_STR(opt, "dnstap-ip", dnstap_ip) 1320 else O_YNO(opt, "dnstap-tls", dnstap_tls) 1321 else O_STR(opt, "dnstap-tls-server-name", dnstap_tls_server_name) 1322 else O_STR(opt, "dnstap-tls-cert-bundle", dnstap_tls_cert_bundle) 1323 else O_STR(opt, "dnstap-tls-client-key-file", 1324 dnstap_tls_client_key_file) 1325 else O_STR(opt, "dnstap-tls-client-cert-file", 1326 dnstap_tls_client_cert_file) 1327 else O_YNO(opt, "dnstap-send-identity", dnstap_send_identity) 1328 else O_YNO(opt, "dnstap-send-version", dnstap_send_version) 1329 else O_STR(opt, "dnstap-identity", dnstap_identity) 1330 else O_STR(opt, "dnstap-version", dnstap_version) 1331 else O_UNS(opt, "dnstap-sample-rate", dnstap_sample_rate) 1332 else O_YNO(opt, "dnstap-log-resolver-query-messages", 1333 dnstap_log_resolver_query_messages) 1334 else O_YNO(opt, "dnstap-log-resolver-response-messages", 1335 dnstap_log_resolver_response_messages) 1336 else O_YNO(opt, "dnstap-log-client-query-messages", 1337 dnstap_log_client_query_messages) 1338 else O_YNO(opt, "dnstap-log-client-response-messages", 1339 dnstap_log_client_response_messages) 1340 else O_YNO(opt, "dnstap-log-forwarder-query-messages", 1341 dnstap_log_forwarder_query_messages) 1342 else O_YNO(opt, "dnstap-log-forwarder-response-messages", 1343 dnstap_log_forwarder_response_messages) 1344 #endif 1345 #ifdef USE_DNSCRYPT 1346 else O_YNO(opt, "dnscrypt-enable", dnscrypt) 1347 else O_DEC(opt, "dnscrypt-port", dnscrypt_port) 1348 else O_STR(opt, "dnscrypt-provider", dnscrypt_provider) 1349 else O_LST(opt, "dnscrypt-provider-cert", dnscrypt_provider_cert) 1350 else O_LST(opt, "dnscrypt-provider-cert-rotated", dnscrypt_provider_cert_rotated) 1351 else O_LST(opt, "dnscrypt-secret-key", dnscrypt_secret_key) 1352 else O_MEM(opt, "dnscrypt-shared-secret-cache-size", 1353 dnscrypt_shared_secret_cache_size) 1354 else O_DEC(opt, "dnscrypt-shared-secret-cache-slabs", 1355 dnscrypt_shared_secret_cache_slabs) 1356 else O_MEM(opt, "dnscrypt-nonce-cache-size", 1357 dnscrypt_nonce_cache_size) 1358 else O_DEC(opt, "dnscrypt-nonce-cache-slabs", 1359 dnscrypt_nonce_cache_slabs) 1360 #endif 1361 else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones) 1362 else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones) 1363 else O_DEC(opt, "max-udp-size", max_udp_size) 1364 else O_LST(opt, "python-script", python_script) 1365 else O_LST(opt, "dynlib-file", dynlib_file) 1366 else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check) 1367 else O_DEC(opt, "ip-ratelimit-cookie", ip_ratelimit_cookie) 1368 else O_DEC(opt, "ip-ratelimit", ip_ratelimit) 1369 else O_DEC(opt, "ratelimit", ratelimit) 1370 else O_MEM(opt, "ip-ratelimit-size", ip_ratelimit_size) 1371 else O_MEM(opt, "ratelimit-size", ratelimit_size) 1372 else O_DEC(opt, "ip-ratelimit-slabs", ip_ratelimit_slabs) 1373 else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs) 1374 else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain) 1375 else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain) 1376 else O_DEC(opt, "ip-ratelimit-factor", ip_ratelimit_factor) 1377 else O_DEC(opt, "ratelimit-factor", ratelimit_factor) 1378 else O_YNO(opt, "ip-ratelimit-backoff", ip_ratelimit_backoff) 1379 else O_YNO(opt, "ratelimit-backoff", ratelimit_backoff) 1380 else O_UNS(opt, "outbound-msg-retry", outbound_msg_retry) 1381 else O_UNS(opt, "max-sent-count", max_sent_count) 1382 else O_UNS(opt, "max-query-restarts", max_query_restarts) 1383 else O_DEC(opt, "fast-server-num", fast_server_num) 1384 else O_DEC(opt, "fast-server-permil", fast_server_permil) 1385 else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min) 1386 else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max) 1387 else O_DEC(opt, "val-max-restart", val_max_restart) 1388 else O_YNO(opt, "qname-minimisation", qname_minimisation) 1389 else O_YNO(opt, "qname-minimisation-strict", qname_minimisation_strict) 1390 else O_IFC(opt, "define-tag", num_tags, tagname) 1391 else O_LTG(opt, "local-zone-tag", local_zone_tags) 1392 else O_LTG(opt, "access-control-tag", acl_tags) 1393 else O_LTG(opt, "response-ip-tag", respip_tags) 1394 else O_LS3(opt, "local-zone-override", local_zone_overrides) 1395 else O_LS3(opt, "access-control-tag-action", acl_tag_actions) 1396 else O_LS3(opt, "access-control-tag-data", acl_tag_datas) 1397 else O_LS2(opt, "access-control-view", acl_view) 1398 else O_LS2(opt, "interface-action", interface_actions) 1399 else O_LTG(opt, "interface-tag", interface_tags) 1400 else O_LS3(opt, "interface-tag-action", interface_tag_actions) 1401 else O_LS3(opt, "interface-tag-data", interface_tag_datas) 1402 else O_LS2(opt, "interface-view", interface_view) 1403 else O_YNO(opt, "pad-responses", pad_responses) 1404 else O_DEC(opt, "pad-responses-block-size", pad_responses_block_size) 1405 else O_YNO(opt, "pad-queries", pad_queries) 1406 else O_DEC(opt, "pad-queries-block-size", pad_queries_block_size) 1407 else O_LS2(opt, "edns-client-strings", edns_client_strings) 1408 else O_LST(opt, "proxy-protocol-port", proxy_protocol_port) 1409 #ifdef USE_IPSECMOD 1410 else O_YNO(opt, "ipsecmod-enabled", ipsecmod_enabled) 1411 else O_YNO(opt, "ipsecmod-ignore-bogus", ipsecmod_ignore_bogus) 1412 else O_STR(opt, "ipsecmod-hook", ipsecmod_hook) 1413 else O_DEC(opt, "ipsecmod-max-ttl", ipsecmod_max_ttl) 1414 else O_LST(opt, "ipsecmod-whitelist", ipsecmod_whitelist) 1415 else O_YNO(opt, "ipsecmod-strict", ipsecmod_strict) 1416 #endif 1417 else O_YNO(opt, "answer-cookie", do_answer_cookie) 1418 else O_STR(opt, "cookie-secret-file", cookie_secret_file) 1419 #ifdef USE_CACHEDB 1420 else O_STR(opt, "backend", cachedb_backend) 1421 else O_STR(opt, "secret-seed", cachedb_secret) 1422 else O_YNO(opt, "cachedb-no-store", cachedb_no_store) 1423 else O_YNO(opt, "cachedb-check-when-serve-expired", cachedb_check_when_serve_expired) 1424 #ifdef USE_REDIS 1425 else O_STR(opt, "redis-server-host", redis_server_host) 1426 else O_STR(opt, "redis-replica-server-host", redis_replica_server_host) 1427 else O_DEC(opt, "redis-server-port", redis_server_port) 1428 else O_DEC(opt, "redis-replica-server-port", redis_replica_server_port) 1429 else O_STR(opt, "redis-server-path", redis_server_path) 1430 else O_STR(opt, "redis-replica-server-path", redis_replica_server_path) 1431 else O_STR(opt, "redis-server-password", redis_server_password) 1432 else O_STR(opt, "redis-replica-server-password", redis_replica_server_password) 1433 else O_DEC(opt, "redis-timeout", redis_timeout) 1434 else O_DEC(opt, "redis-replica-timeout", redis_replica_timeout) 1435 else O_DEC(opt, "redis-command-timeout", redis_command_timeout) 1436 else O_DEC(opt, "redis-replica-command-timeout", redis_replica_command_timeout) 1437 else O_DEC(opt, "redis-connect-timeout", redis_connect_timeout) 1438 else O_DEC(opt, "redis-replica-connect-timeout", redis_replica_connect_timeout) 1439 else O_YNO(opt, "redis-expire-records", redis_expire_records) 1440 else O_DEC(opt, "redis-logical-db", redis_logical_db) 1441 else O_DEC(opt, "redis-replica-logical-db", redis_replica_logical_db) 1442 #endif /* USE_REDIS */ 1443 #endif /* USE_CACHEDB */ 1444 #ifdef USE_IPSET 1445 else O_STR(opt, "name-v4", ipset_name_v4) 1446 else O_STR(opt, "name-v6", ipset_name_v6) 1447 #endif 1448 /* not here: 1449 * outgoing-permit, outgoing-avoid - have list of ports 1450 * local-zone - zones and nodefault variables 1451 * local-data - see below 1452 * local-data-ptr - converted to local-data entries 1453 * stub-zone, name, stub-addr, stub-host, stub-prime 1454 * forward-zone, name, forward-addr, forward-host 1455 */ 1456 else return 0; 1457 return 1; 1458 } 1459 1460 /** initialize the global cfg_parser object */ 1461 static void 1462 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot) 1463 { 1464 static struct config_parser_state st; 1465 cfg_parser = &st; 1466 cfg_parser->filename = filename; 1467 cfg_parser->line = 1; 1468 cfg_parser->errors = 0; 1469 cfg_parser->cfg = cfg; 1470 cfg_parser->chroot = chroot; 1471 cfg_parser->started_toplevel = 0; 1472 init_cfg_parse(); 1473 } 1474 1475 void 1476 config_auto_slab_values(struct config_file* cfg) 1477 { 1478 #define SET_AUTO_SLAB(var, name, val) \ 1479 do { \ 1480 if(cfg->var == 0) { \ 1481 cfg->var = val; \ 1482 verbose(VERB_QUERY, "setting "name": %lu", (unsigned long)val); \ 1483 } \ 1484 } while(0); 1485 #ifdef THREADS_DISABLED 1486 size_t pow_2_threads = 1; 1487 #else 1488 size_t pow_2_threads = 4; /* pow2 start */ 1489 while (pow_2_threads < (size_t)(cfg->num_threads?cfg->num_threads:1) && 1490 /* 1/3 of the distance to the next pow2 value stays with the 1491 * lower value */ 1492 (size_t)cfg->num_threads > pow_2_threads + (pow_2_threads - 1)/3) { 1493 pow_2_threads <<= 1; 1494 } 1495 log_assert((pow_2_threads & (pow_2_threads - 1)) == 0); /* powerof2? */ 1496 #endif /* THREADS_DISABLED */ 1497 1498 SET_AUTO_SLAB(msg_cache_slabs, "msg-cache-slabs", pow_2_threads); 1499 SET_AUTO_SLAB(rrset_cache_slabs, "rrset-cache-slabs", pow_2_threads); 1500 SET_AUTO_SLAB(infra_cache_slabs, "infra-cache-slabs", pow_2_threads); 1501 SET_AUTO_SLAB(key_cache_slabs, "key-cache-slabs", pow_2_threads); 1502 SET_AUTO_SLAB(ip_ratelimit_slabs, "ip-ratelimit-slabs", pow_2_threads); 1503 SET_AUTO_SLAB(ratelimit_slabs, "ratelimit-slabs", pow_2_threads); 1504 SET_AUTO_SLAB(dnscrypt_shared_secret_cache_slabs, 1505 "dnscrypt-shared-secret-cache-slabs", pow_2_threads); 1506 SET_AUTO_SLAB(dnscrypt_nonce_cache_slabs, 1507 "dnscrypt-nonce-cache-slabs", pow_2_threads); 1508 } 1509 1510 int 1511 config_read(struct config_file* cfg, const char* filename, const char* chroot) 1512 { 1513 FILE *in; 1514 char *fname = (char*)filename; 1515 #ifdef HAVE_GLOB 1516 glob_t g; 1517 size_t i; 1518 int r, flags; 1519 #endif 1520 if(!fname) 1521 return 1; 1522 1523 /* check for wildcards */ 1524 #ifdef HAVE_GLOB 1525 if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') && 1526 !strchr(fname, '{') && !strchr(fname, '~'))) { 1527 verbose(VERB_QUERY, "wildcard found, processing %s", fname); 1528 flags = 0 1529 #ifdef GLOB_ERR 1530 | GLOB_ERR 1531 #endif 1532 #ifdef GLOB_NOSORT 1533 | GLOB_NOSORT 1534 #endif 1535 #ifdef GLOB_BRACE 1536 | GLOB_BRACE 1537 #endif 1538 #ifdef GLOB_TILDE 1539 | GLOB_TILDE 1540 #endif 1541 ; 1542 memset(&g, 0, sizeof(g)); 1543 r = glob(fname, flags, NULL, &g); 1544 if(r) { 1545 /* some error */ 1546 globfree(&g); 1547 if(r == GLOB_NOMATCH) { 1548 verbose(VERB_QUERY, "include: " 1549 "no matches for %s", fname); 1550 return 1; 1551 } else if(r == GLOB_NOSPACE) { 1552 log_err("include: %s: " 1553 "fnametern out of memory", fname); 1554 } else if(r == GLOB_ABORTED) { 1555 log_err("wildcard include: %s: expansion " 1556 "aborted (%s)", fname, strerror(errno)); 1557 } else { 1558 log_err("wildcard include: %s: expansion " 1559 "failed (%s)", fname, strerror(errno)); 1560 } 1561 /* ignore globs that yield no files */ 1562 return 1; 1563 } 1564 /* process files found, if any */ 1565 for(i=0; i<(size_t)g.gl_pathc; i++) { 1566 if(!config_read(cfg, g.gl_pathv[i], chroot)) { 1567 log_err("error reading wildcard " 1568 "include: %s", g.gl_pathv[i]); 1569 globfree(&g); 1570 return 0; 1571 } 1572 } 1573 globfree(&g); 1574 config_auto_slab_values(cfg); 1575 return 1; 1576 } 1577 #endif /* HAVE_GLOB */ 1578 1579 in = fopen(fname, "r"); 1580 if(!in) { 1581 log_err("Could not open %s: %s", fname, strerror(errno)); 1582 return 0; 1583 } 1584 create_cfg_parser(cfg, fname, chroot); 1585 ub_c_in = in; 1586 ub_c_parse(); 1587 fclose(in); 1588 1589 if(!cfg->dnscrypt) cfg->dnscrypt_port = 0; 1590 1591 if(cfg_parser->errors != 0) { 1592 fprintf(stderr, "read %s failed: %d errors in configuration file\n", 1593 fname, cfg_parser->errors); 1594 errno=EINVAL; 1595 return 0; 1596 } 1597 1598 config_auto_slab_values(cfg); 1599 return 1; 1600 } 1601 1602 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm) 1603 { 1604 struct config_stub* p = *(*pp); 1605 while(p) { 1606 if(strcmp(p->name, nm) == 0) 1607 return p; 1608 (*pp) = &p->next; 1609 p = p->next; 1610 } 1611 return NULL; 1612 } 1613 1614 void 1615 config_delstrlist(struct config_strlist* p) 1616 { 1617 struct config_strlist *np; 1618 while(p) { 1619 np = p->next; 1620 free(p->str); 1621 free(p); 1622 p = np; 1623 } 1624 } 1625 1626 void 1627 config_deldblstrlist(struct config_str2list* p) 1628 { 1629 struct config_str2list *np; 1630 while(p) { 1631 np = p->next; 1632 free(p->str); 1633 free(p->str2); 1634 free(p); 1635 p = np; 1636 } 1637 } 1638 1639 void 1640 config_deltrplstrlist(struct config_str3list* p) 1641 { 1642 struct config_str3list *np; 1643 while(p) { 1644 np = p->next; 1645 free(p->str); 1646 free(p->str2); 1647 free(p->str3); 1648 free(p); 1649 p = np; 1650 } 1651 } 1652 1653 void 1654 config_delauth(struct config_auth* p) 1655 { 1656 if(!p) return; 1657 free(p->name); 1658 config_delstrlist(p->masters); 1659 config_delstrlist(p->urls); 1660 config_delstrlist(p->allow_notify); 1661 free(p->zonefile); 1662 free(p->rpz_taglist); 1663 free(p->rpz_action_override); 1664 free(p->rpz_cname); 1665 free(p->rpz_log_name); 1666 free(p); 1667 } 1668 1669 void 1670 config_delauths(struct config_auth* p) 1671 { 1672 struct config_auth* np; 1673 while(p) { 1674 np = p->next; 1675 config_delauth(p); 1676 p = np; 1677 } 1678 } 1679 1680 void 1681 config_delstub(struct config_stub* p) 1682 { 1683 if(!p) return; 1684 free(p->name); 1685 config_delstrlist(p->hosts); 1686 config_delstrlist(p->addrs); 1687 free(p); 1688 } 1689 1690 void 1691 config_delstubs(struct config_stub* p) 1692 { 1693 struct config_stub* np; 1694 while(p) { 1695 np = p->next; 1696 config_delstub(p); 1697 p = np; 1698 } 1699 } 1700 1701 void 1702 config_delview(struct config_view* p) 1703 { 1704 if(!p) return; 1705 free(p->name); 1706 config_deldblstrlist(p->local_zones); 1707 config_delstrlist(p->local_zones_nodefault); 1708 #ifdef USE_IPSET 1709 config_delstrlist(p->local_zones_ipset); 1710 #endif 1711 config_delstrlist(p->local_data); 1712 free(p); 1713 } 1714 1715 void 1716 config_delviews(struct config_view* p) 1717 { 1718 struct config_view* np; 1719 while(p) { 1720 np = p->next; 1721 config_delview(p); 1722 p = np; 1723 } 1724 } 1725 1726 void 1727 config_del_strarray(char** array, int num) 1728 { 1729 int i; 1730 if(!array) 1731 return; 1732 for(i=0; i<num; i++) { 1733 free(array[i]); 1734 } 1735 free(array); 1736 } 1737 1738 void 1739 config_del_strbytelist(struct config_strbytelist* p) 1740 { 1741 struct config_strbytelist* np; 1742 while(p) { 1743 np = p->next; 1744 free(p->str); 1745 free(p->str2); 1746 free(p); 1747 p = np; 1748 } 1749 } 1750 1751 void 1752 config_delete(struct config_file* cfg) 1753 { 1754 if(!cfg) return; 1755 free(cfg->username); 1756 free(cfg->chrootdir); 1757 free(cfg->directory); 1758 free(cfg->logfile); 1759 free(cfg->pidfile); 1760 free(cfg->if_automatic_ports); 1761 free(cfg->target_fetch_policy); 1762 free(cfg->ssl_service_key); 1763 free(cfg->ssl_service_pem); 1764 free(cfg->tls_cert_bundle); 1765 config_delstrlist(cfg->tls_additional_port); 1766 config_delstrlist(cfg->tls_session_ticket_keys.first); 1767 free(cfg->tls_ciphers); 1768 free(cfg->tls_ciphersuites); 1769 free(cfg->tls_protocols); 1770 free(cfg->http_endpoint); 1771 if(cfg->log_identity) { 1772 log_ident_revert_to_default(); 1773 free(cfg->log_identity); 1774 } 1775 config_del_strarray(cfg->ifs, cfg->num_ifs); 1776 config_del_strarray(cfg->out_ifs, cfg->num_out_ifs); 1777 config_delstubs(cfg->stubs); 1778 config_delstubs(cfg->forwards); 1779 config_delauths(cfg->auths); 1780 config_delviews(cfg->views); 1781 config_delstrlist(cfg->donotqueryaddrs); 1782 config_delstrlist(cfg->root_hints); 1783 #ifdef CLIENT_SUBNET 1784 config_delstrlist(cfg->client_subnet); 1785 config_delstrlist(cfg->client_subnet_zone); 1786 #endif 1787 free(cfg->identity); 1788 free(cfg->version); 1789 free(cfg->http_user_agent); 1790 free(cfg->nsid_cfg_str); 1791 free(cfg->nsid); 1792 free(cfg->module_conf); 1793 free(cfg->outgoing_avail_ports); 1794 config_delstrlist(cfg->caps_whitelist); 1795 config_delstrlist(cfg->private_address); 1796 config_delstrlist(cfg->private_domain); 1797 config_delstrlist(cfg->auto_trust_anchor_file_list); 1798 config_delstrlist(cfg->trust_anchor_file_list); 1799 config_delstrlist(cfg->trusted_keys_file_list); 1800 config_delstrlist(cfg->trust_anchor_list); 1801 config_delstrlist(cfg->domain_insecure); 1802 config_deldblstrlist(cfg->acls); 1803 config_deldblstrlist(cfg->tcp_connection_limits); 1804 free(cfg->val_nsec3_key_iterations); 1805 config_deldblstrlist(cfg->local_zones); 1806 config_delstrlist(cfg->local_zones_nodefault); 1807 #ifdef USE_IPSET 1808 config_delstrlist(cfg->local_zones_ipset); 1809 #endif 1810 config_delstrlist(cfg->local_data); 1811 config_deltrplstrlist(cfg->local_zone_overrides); 1812 config_del_strarray(cfg->tagname, cfg->num_tags); 1813 config_del_strbytelist(cfg->local_zone_tags); 1814 config_del_strbytelist(cfg->respip_tags); 1815 config_deldblstrlist(cfg->respip_actions); 1816 config_deldblstrlist(cfg->acl_view); 1817 config_del_strbytelist(cfg->acl_tags); 1818 config_deltrplstrlist(cfg->acl_tag_actions); 1819 config_deltrplstrlist(cfg->acl_tag_datas); 1820 config_deldblstrlist(cfg->interface_actions); 1821 config_deldblstrlist(cfg->interface_view); 1822 config_del_strbytelist(cfg->interface_tags); 1823 config_deltrplstrlist(cfg->interface_tag_actions); 1824 config_deltrplstrlist(cfg->interface_tag_datas); 1825 config_delstrlist(cfg->control_ifs.first); 1826 config_deldblstrlist(cfg->wait_limit_netblock); 1827 config_deldblstrlist(cfg->wait_limit_cookie_netblock); 1828 free(cfg->server_key_file); 1829 free(cfg->server_cert_file); 1830 free(cfg->control_key_file); 1831 free(cfg->control_cert_file); 1832 free(cfg->nat64_prefix); 1833 free(cfg->dns64_prefix); 1834 config_delstrlist(cfg->dns64_ignore_aaaa); 1835 free(cfg->dnstap_socket_path); 1836 free(cfg->dnstap_ip); 1837 free(cfg->dnstap_tls_server_name); 1838 free(cfg->dnstap_tls_cert_bundle); 1839 free(cfg->dnstap_tls_client_key_file); 1840 free(cfg->dnstap_tls_client_cert_file); 1841 free(cfg->dnstap_identity); 1842 free(cfg->dnstap_version); 1843 config_deldblstrlist(cfg->ratelimit_for_domain); 1844 config_deldblstrlist(cfg->ratelimit_below_domain); 1845 config_delstrlist(cfg->python_script); 1846 config_delstrlist(cfg->dynlib_file); 1847 config_deldblstrlist(cfg->edns_client_strings); 1848 config_delstrlist(cfg->proxy_protocol_port); 1849 #ifdef USE_IPSECMOD 1850 free(cfg->ipsecmod_hook); 1851 config_delstrlist(cfg->ipsecmod_whitelist); 1852 #endif 1853 free(cfg->cookie_secret_file); 1854 #ifdef USE_CACHEDB 1855 free(cfg->cachedb_backend); 1856 free(cfg->cachedb_secret); 1857 #ifdef USE_REDIS 1858 free(cfg->redis_server_host); 1859 free(cfg->redis_replica_server_host); 1860 free(cfg->redis_server_path); 1861 free(cfg->redis_replica_server_path); 1862 free(cfg->redis_server_password); 1863 free(cfg->redis_replica_server_password); 1864 #endif /* USE_REDIS */ 1865 #endif /* USE_CACHEDB */ 1866 #ifdef USE_IPSET 1867 free(cfg->ipset_name_v4); 1868 free(cfg->ipset_name_v6); 1869 #endif 1870 free(cfg); 1871 } 1872 1873 static void 1874 init_cookie_secret(uint8_t* cookie_secret, size_t cookie_secret_len) 1875 { 1876 struct ub_randstate *rand = ub_initstate(NULL); 1877 1878 if (!rand) 1879 fatal_exit("could not init random generator"); 1880 while (cookie_secret_len) { 1881 *cookie_secret++ = (uint8_t)ub_random(rand); 1882 cookie_secret_len--; 1883 } 1884 ub_randfree(rand); 1885 } 1886 1887 static void 1888 init_outgoing_availports(int* a, int num) 1889 { 1890 /* generated with make iana_update */ 1891 const int iana_assigned[] = { 1892 #include "util/iana_ports.inc" 1893 -1 }; /* end marker to put behind trailing comma */ 1894 1895 int i; 1896 /* do not use <1024, that could be trouble with the system, privs */ 1897 for(i=1024; i<num; i++) { 1898 a[i] = i; 1899 } 1900 /* create empty spot at 49152 to keep ephemeral ports available 1901 * to other programs */ 1902 for(i=49152; i<49152+256; i++) 1903 a[i] = 0; 1904 /* pick out all the IANA assigned ports */ 1905 for(i=0; iana_assigned[i]!=-1; i++) { 1906 if(iana_assigned[i] < num) 1907 a[iana_assigned[i]] = 0; 1908 } 1909 } 1910 1911 static int 1912 extract_port_from_str(const char* str, int max_port) { 1913 char* endptr; 1914 long int value; 1915 if (str == NULL || *str == '\0') { 1916 log_err("str: '%s' is invalid", (str?str:"NULL")); 1917 return -1; 1918 } 1919 1920 value = strtol(str, &endptr, 10); 1921 if ((endptr == str) || (*endptr != '\0')) { 1922 log_err("cannot parse port number '%s'", str); 1923 return -1; 1924 } 1925 1926 if (errno == ERANGE) { 1927 log_err("overflow occurred when parsing '%s'", str); 1928 return -1; 1929 } 1930 1931 if (value == 0 && strcmp(str, "0") != 0) { 1932 log_err("cannot parse port number '%s'", str); 1933 return -1; 1934 } 1935 1936 if (value < 0 || value >= max_port) { 1937 log_err(" '%s' is out of bounds [0, %d)", str, max_port); 1938 return -1; 1939 } 1940 1941 return (int)value; 1942 } 1943 1944 int 1945 cfg_mark_ports(const char* str, int allow, int* avail, int num) 1946 { 1947 char* mid = strchr(str, '-'); 1948 #ifdef DISABLE_EXPLICIT_PORT_RANDOMISATION 1949 log_warn("Explicit port randomisation disabled, ignoring " 1950 "outgoing-port-permit and outgoing-port-avoid configuration " 1951 "options"); 1952 #endif 1953 if(!mid) { 1954 int port = extract_port_from_str(str, num); 1955 if (port < 0) { 1956 log_err("Failed to parse the port number"); 1957 return 0; 1958 } 1959 if(port < num) 1960 avail[port] = (allow?port:0); 1961 } else { 1962 char buf[16]; 1963 int i, low; 1964 int high = extract_port_from_str(mid+1, num); 1965 if (high < 0) { 1966 log_err("Failed to parse the port number"); 1967 return 0; 1968 } 1969 1970 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) { 1971 log_err("cannot parse port number '%s'", str); 1972 return 0; 1973 } 1974 1975 if(mid > str) 1976 memcpy(buf, str, (size_t)(mid-str)); 1977 buf[mid-str] = 0; 1978 low = extract_port_from_str(buf, num); 1979 if (low < 0) { 1980 log_err("Failed to parse the port number"); 1981 return 0; 1982 } 1983 1984 if (low > high) { 1985 log_err("Low value is greater than high value"); 1986 return 0; 1987 } 1988 1989 for(i=low; i<=high; i++) { 1990 if(i < num) 1991 avail[i] = (allow?i:0); 1992 } 1993 } 1994 return 1; 1995 } 1996 1997 int 1998 cfg_scan_ports(int* avail, int num) 1999 { 2000 int i; 2001 int count = 0; 2002 for(i=0; i<num; i++) { 2003 if(avail[i]) 2004 count++; 2005 } 2006 return count; 2007 } 2008 2009 int cfg_condense_ports(struct config_file* cfg, int** avail) 2010 { 2011 int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536); 2012 int i, at = 0; 2013 *avail = NULL; 2014 if(num == 0) 2015 return 0; 2016 *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int)); 2017 if(!*avail) 2018 return 0; 2019 for(i=0; i<65536; i++) { 2020 if(cfg->outgoing_avail_ports[i]) 2021 (*avail)[at++] = cfg->outgoing_avail_ports[i]; 2022 } 2023 log_assert(at == num); 2024 return num; 2025 } 2026 2027 void cfg_apply_local_port_policy(struct config_file* cfg, int num) { 2028 (void)cfg; 2029 (void)num; 2030 #ifdef USE_LINUX_IP_LOCAL_PORT_RANGE 2031 { 2032 int i = 0; 2033 FILE* range_fd; 2034 if ((range_fd = fopen(LINUX_IP_LOCAL_PORT_RANGE_PATH, "r")) != NULL) { 2035 int min_port = 0; 2036 int max_port = num - 1; 2037 if (fscanf(range_fd, "%d %d", &min_port, &max_port) == 2) { 2038 for(i=0; i<min_port; i++) { 2039 cfg->outgoing_avail_ports[i] = 0; 2040 } 2041 for(i=max_port+1; i<num; i++) { 2042 cfg->outgoing_avail_ports[i] = 0; 2043 } 2044 } else { 2045 log_err("unexpected port range in %s", 2046 LINUX_IP_LOCAL_PORT_RANGE_PATH); 2047 } 2048 fclose(range_fd); 2049 } else { 2050 log_err("failed to read from file: %s (%s)", 2051 LINUX_IP_LOCAL_PORT_RANGE_PATH, 2052 strerror(errno)); 2053 } 2054 } 2055 #endif 2056 } 2057 2058 /** print error with file and line number */ 2059 static void ub_c_error_va_list(const char *fmt, va_list args) 2060 { 2061 cfg_parser->errors++; 2062 fprintf(stderr, "%s:%d: error: ", cfg_parser->filename, 2063 cfg_parser->line); 2064 vfprintf(stderr, fmt, args); 2065 fprintf(stderr, "\n"); 2066 } 2067 2068 /** print error with file and line number */ 2069 void ub_c_error_msg(const char* fmt, ...) 2070 { 2071 va_list args; 2072 va_start(args, fmt); 2073 ub_c_error_va_list(fmt, args); 2074 va_end(args); 2075 } 2076 2077 void ub_c_error(const char *str) 2078 { 2079 cfg_parser->errors++; 2080 if(strcmp(str, "syntax error")==0 && cfg_parser->started_toplevel ==0) 2081 str = "syntax error, is there no section start after an " 2082 "include-toplevel directive perhaps."; 2083 fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename, 2084 cfg_parser->line, str); 2085 } 2086 2087 int ub_c_wrap(void) 2088 { 2089 return 1; 2090 } 2091 2092 int cfg_strlist_append(struct config_strlist_head* list, char* item) 2093 { 2094 struct config_strlist *s; 2095 if(!item || !list) { 2096 free(item); 2097 return 0; 2098 } 2099 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 2100 if(!s) { 2101 free(item); 2102 return 0; 2103 } 2104 s->str = item; 2105 s->next = NULL; 2106 if(list->last) 2107 list->last->next = s; 2108 else 2109 list->first = s; 2110 list->last = s; 2111 return 1; 2112 } 2113 2114 int 2115 cfg_region_strlist_insert(struct regional* region, 2116 struct config_strlist** head, char* item) 2117 { 2118 struct config_strlist *s; 2119 if(!item || !head) 2120 return 0; 2121 s = (struct config_strlist*)regional_alloc_zero(region, 2122 sizeof(struct config_strlist)); 2123 if(!s) 2124 return 0; 2125 s->str = item; 2126 s->next = *head; 2127 *head = s; 2128 return 1; 2129 } 2130 2131 struct config_strlist* 2132 cfg_strlist_find(struct config_strlist* head, const char *item) 2133 { 2134 struct config_strlist *s = head; 2135 if(!head){ 2136 return NULL; 2137 } 2138 while(s) { 2139 if(strcmp(s->str, item) == 0) { 2140 return s; 2141 } 2142 s = s->next; 2143 } 2144 return NULL; 2145 } 2146 2147 int 2148 cfg_strlist_insert(struct config_strlist** head, char* item) 2149 { 2150 struct config_strlist *s; 2151 if(!item || !head) { 2152 free(item); 2153 return 0; 2154 } 2155 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 2156 if(!s) { 2157 free(item); 2158 return 0; 2159 } 2160 s->str = item; 2161 s->next = *head; 2162 *head = s; 2163 return 1; 2164 } 2165 2166 int 2167 cfg_strlist_append_ex(struct config_strlist** head, char* item) 2168 { 2169 struct config_strlist *s; 2170 if(!item || !head) 2171 return 0; 2172 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 2173 if(!s) 2174 return 0; 2175 s->str = item; 2176 s->next = NULL; 2177 2178 if (*head==NULL) { 2179 *head = s; 2180 } else { 2181 struct config_strlist *last = *head; 2182 while (last->next!=NULL) { 2183 last = last->next; 2184 } 2185 last->next = s; 2186 } 2187 2188 return 1; 2189 } 2190 2191 int 2192 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2) 2193 { 2194 struct config_str2list *s; 2195 if(!item || !i2 || !head) { 2196 free(item); 2197 free(i2); 2198 return 0; 2199 } 2200 s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list)); 2201 if(!s) { 2202 free(item); 2203 free(i2); 2204 return 0; 2205 } 2206 s->str = item; 2207 s->str2 = i2; 2208 s->next = *head; 2209 *head = s; 2210 return 1; 2211 } 2212 2213 int 2214 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2, 2215 char* i3) 2216 { 2217 struct config_str3list *s; 2218 if(!item || !i2 || !i3 || !head) 2219 return 0; 2220 s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list)); 2221 if(!s) 2222 return 0; 2223 s->str = item; 2224 s->str2 = i2; 2225 s->str3 = i3; 2226 s->next = *head; 2227 *head = s; 2228 return 1; 2229 } 2230 2231 int 2232 cfg_strbytelist_insert(struct config_strbytelist** head, char* item, 2233 uint8_t* i2, size_t i2len) 2234 { 2235 struct config_strbytelist* s; 2236 if(!item || !i2 || !head) 2237 return 0; 2238 s = (struct config_strbytelist*)calloc(1, sizeof(*s)); 2239 if(!s) 2240 return 0; 2241 s->str = item; 2242 s->str2 = i2; 2243 s->str2len = i2len; 2244 s->next = *head; 2245 *head = s; 2246 return 1; 2247 } 2248 2249 time_t 2250 cfg_convert_timeval(const char* str) 2251 { 2252 time_t t; 2253 struct tm tm; 2254 memset(&tm, 0, sizeof(tm)); 2255 if(strlen(str) < 14) 2256 return 0; 2257 if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon, 2258 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) 2259 return 0; 2260 tm.tm_year -= 1900; 2261 tm.tm_mon--; 2262 /* Check values */ 2263 if (tm.tm_year < 70) return 0; 2264 if (tm.tm_mon < 0 || tm.tm_mon > 11) return 0; 2265 if (tm.tm_mday < 1 || tm.tm_mday > 31) return 0; 2266 if (tm.tm_hour < 0 || tm.tm_hour > 23) return 0; 2267 if (tm.tm_min < 0 || tm.tm_min > 59) return 0; 2268 if (tm.tm_sec < 0 || tm.tm_sec > 59) return 0; 2269 /* call ldns conversion function */ 2270 t = sldns_mktime_from_utc(&tm); 2271 return t; 2272 } 2273 2274 int 2275 cfg_count_numbers(const char* s) 2276 { 2277 /* format ::= (sp num)+ sp */ 2278 /* num ::= [-](0-9)+ */ 2279 /* sp ::= (space|tab)* */ 2280 int num = 0; 2281 while(*s) { 2282 while(*s && isspace((unsigned char)*s)) 2283 s++; 2284 if(!*s) /* end of string */ 2285 break; 2286 if(*s == '-') 2287 s++; 2288 if(!*s) /* only - not allowed */ 2289 return 0; 2290 if(!isdigit((unsigned char)*s)) /* bad character */ 2291 return 0; 2292 while(*s && isdigit((unsigned char)*s)) 2293 s++; 2294 num++; 2295 } 2296 return num; 2297 } 2298 2299 /** all digit number */ 2300 static int isalldigit(const char* str, size_t l) 2301 { 2302 size_t i; 2303 for(i=0; i<l; i++) 2304 if(!isdigit((unsigned char)str[i])) 2305 return 0; 2306 return 1; 2307 } 2308 2309 int 2310 cfg_parse_memsize(const char* str, size_t* res) 2311 { 2312 size_t len; 2313 size_t mult = 1; 2314 if(!str || (len=(size_t)strlen(str)) == 0) { 2315 log_err("not a size: '%s'", str); 2316 return 0; 2317 } 2318 if(isalldigit(str, len)) { 2319 *res = (size_t)atol(str); 2320 return 1; 2321 } 2322 /* check appended num */ 2323 while(len>0 && str[len-1]==' ') 2324 len--; 2325 if(len > 1 && str[len-1] == 'b') 2326 len--; 2327 else if(len > 1 && str[len-1] == 'B') 2328 len--; 2329 2330 if(len > 1 && tolower((unsigned char)str[len-1]) == 'g') 2331 mult = 1024*1024*1024; 2332 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm') 2333 mult = 1024*1024; 2334 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k') 2335 mult = 1024; 2336 else if(len > 0 && isdigit((unsigned char)str[len-1])) 2337 mult = 1; 2338 else { 2339 log_err("unknown size specifier: '%s'", str); 2340 return 0; 2341 } 2342 while(len>1 && str[len-2]==' ') 2343 len--; 2344 2345 if(!isalldigit(str, len-1)) { 2346 log_err("unknown size specifier: '%s'", str); 2347 return 0; 2348 } 2349 *res = ((size_t)atol(str)) * mult; 2350 return 1; 2351 } 2352 2353 int 2354 find_tag_id(struct config_file* cfg, const char* tag) 2355 { 2356 int i; 2357 for(i=0; i<cfg->num_tags; i++) { 2358 if(strcmp(cfg->tagname[i], tag) == 0) 2359 return i; 2360 } 2361 return -1; 2362 } 2363 2364 int 2365 config_add_tag(struct config_file* cfg, const char* tag) 2366 { 2367 char** newarray; 2368 char* newtag; 2369 if(find_tag_id(cfg, tag) != -1) 2370 return 1; /* nothing to do */ 2371 newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1)); 2372 if(!newarray) 2373 return 0; 2374 newtag = strdup(tag); 2375 if(!newtag) { 2376 free(newarray); 2377 return 0; 2378 } 2379 if(cfg->tagname) { 2380 memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags); 2381 free(cfg->tagname); 2382 } 2383 newarray[cfg->num_tags++] = newtag; 2384 cfg->tagname = newarray; 2385 return 1; 2386 } 2387 2388 /** set a bit in a bit array */ 2389 static void 2390 cfg_set_bit(uint8_t* bitlist, size_t len, int id) 2391 { 2392 int pos = id/8; 2393 log_assert((size_t)pos < len); 2394 (void)len; 2395 bitlist[pos] |= 1<<(id%8); 2396 } 2397 2398 uint8_t* config_parse_taglist(struct config_file* cfg, char* str, 2399 size_t* listlen) 2400 { 2401 uint8_t* taglist = NULL; 2402 size_t len = 0; 2403 char* p, *s; 2404 2405 /* allocate */ 2406 if(cfg->num_tags == 0) { 2407 log_err("parse taglist, but no tags defined"); 2408 return 0; 2409 } 2410 len = (size_t)(cfg->num_tags+7)/8; 2411 taglist = calloc(1, len); 2412 if(!taglist) { 2413 log_err("out of memory"); 2414 return 0; 2415 } 2416 2417 /* parse */ 2418 s = str; 2419 while((p=strsep(&s, " \t\n")) != NULL) { 2420 if(*p) { 2421 int id = find_tag_id(cfg, p); 2422 /* set this bit in the bitlist */ 2423 if(id == -1) { 2424 log_err("unknown tag: %s", p); 2425 free(taglist); 2426 return 0; 2427 } 2428 cfg_set_bit(taglist, len, id); 2429 } 2430 } 2431 2432 *listlen = len; 2433 return taglist; 2434 } 2435 2436 uint8_t* cfg_parse_nsid(const char* str, uint16_t* nsid_len) 2437 { 2438 uint8_t* nsid = NULL; 2439 2440 if (strncasecmp(str, "ascii_", 6) == 0) { 2441 if ((nsid = (uint8_t *)strdup(str + 6))) 2442 *nsid_len = strlen(str + 6); 2443 2444 } else if (strlen(str) % 2) { 2445 ; /* hex string has even number of characters */ 2446 } 2447 2448 else if (*str && (nsid = calloc(1, strlen(str) / 2))) { 2449 const char *ch; 2450 uint8_t *dp; 2451 2452 for ( ch = str, dp = nsid 2453 ; isxdigit((unsigned char)ch[0]) && isxdigit((unsigned char)ch[1]) 2454 ; ch += 2, dp++) { 2455 *dp = (uint8_t)sldns_hexdigit_to_int(ch[0]) * 16; 2456 *dp += (uint8_t)sldns_hexdigit_to_int(ch[1]); 2457 } 2458 if (*ch) { 2459 free(nsid); 2460 nsid = NULL; 2461 } else 2462 *nsid_len = strlen(str) / 2; 2463 } 2464 return nsid; 2465 } 2466 2467 2468 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist, 2469 size_t taglen) 2470 { 2471 char buf[10240]; 2472 size_t i, j, len = 0; 2473 buf[0] = 0; 2474 for(i=0; i<taglen; i++) { 2475 if(taglist[i] == 0) 2476 continue; 2477 for(j=0; j<8; j++) { 2478 if((taglist[i] & (1<<j)) != 0) { 2479 size_t id = i*8 + j; 2480 snprintf(buf+len, sizeof(buf)-len, "%s%s", 2481 (len==0?"":" "), cfg->tagname[id]); 2482 len += strlen(buf+len); 2483 } 2484 } 2485 } 2486 return strdup(buf); 2487 } 2488 2489 int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2, 2490 size_t list2len) 2491 { 2492 size_t i; 2493 if(!list1 || !list2) 2494 return 0; 2495 for(i=0; i<list1len && i<list2len; i++) { 2496 if((list1[i] & list2[i]) != 0) 2497 return 1; 2498 } 2499 return 0; 2500 } 2501 2502 void 2503 config_apply(struct config_file* config) 2504 { 2505 MAX_TTL = (time_t)config->max_ttl; 2506 MIN_TTL = (time_t)config->min_ttl; 2507 SERVE_EXPIRED = config->serve_expired; 2508 SERVE_EXPIRED_TTL = (time_t)config->serve_expired_ttl; 2509 SERVE_EXPIRED_TTL_RESET = config->serve_expired_ttl_reset; 2510 SERVE_EXPIRED_REPLY_TTL = (time_t)config->serve_expired_reply_ttl; 2511 SERVE_ORIGINAL_TTL = config->serve_original_ttl; 2512 MAX_NEG_TTL = (time_t)config->max_negative_ttl; 2513 MIN_NEG_TTL = (time_t)config->min_negative_ttl; 2514 RTT_MIN_TIMEOUT = config->infra_cache_min_rtt; 2515 RTT_MAX_TIMEOUT = config_apply_max_rtt(config->infra_cache_max_rtt); 2516 EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size; 2517 MINIMAL_RESPONSES = config->minimal_responses; 2518 RRSET_ROUNDROBIN = config->rrset_roundrobin; 2519 LOG_TAG_QUERYREPLY = config->log_tag_queryreply; 2520 MAX_GLOBAL_QUOTA = config->max_global_quota; 2521 UNKNOWN_SERVER_NICENESS = config->unknown_server_time_limit; 2522 log_set_time_asc(config->log_time_ascii); 2523 log_set_time_iso(config->log_time_iso); 2524 autr_permit_small_holddown = config->permit_small_holddown; 2525 stream_wait_max = config->stream_wait_size; 2526 http2_query_buffer_max = config->http_query_buffer_size; 2527 http2_response_buffer_max = config->http_response_buffer_size; 2528 } 2529 2530 void config_lookup_uid(struct config_file* cfg) 2531 { 2532 #ifdef HAVE_GETPWNAM 2533 /* translate username into uid and gid */ 2534 if(cfg->username && cfg->username[0]) { 2535 struct passwd *pwd; 2536 if((pwd = getpwnam(cfg->username)) != NULL) { 2537 cfg_uid = pwd->pw_uid; 2538 cfg_gid = pwd->pw_gid; 2539 } 2540 } 2541 #else 2542 (void)cfg; 2543 #endif 2544 } 2545 2546 /** 2547 * Calculate string length of full pathname in original filesys 2548 * @param fname: the path name to convert. 2549 * Must not be null or empty. 2550 * @param cfg: config struct for chroot and chdir (if set). 2551 * @param use_chdir: if false, only chroot is applied. 2552 * @return length of string. 2553 * remember to allocate one more for 0 at end in mallocs. 2554 */ 2555 static size_t 2556 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) 2557 { 2558 size_t len = 0; 2559 int slashit = 0; 2560 if(cfg->chrootdir && cfg->chrootdir[0] && 2561 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { 2562 /* already full pathname, return it */ 2563 return strlen(fname); 2564 } 2565 /* chroot */ 2566 if(cfg->chrootdir && cfg->chrootdir[0]) { 2567 /* start with chrootdir */ 2568 len += strlen(cfg->chrootdir); 2569 slashit = 1; 2570 } 2571 /* chdir */ 2572 #ifdef UB_ON_WINDOWS 2573 if(fname[0] != 0 && fname[1] == ':') { 2574 /* full path, no chdir */ 2575 } else 2576 #endif 2577 if(fname[0] == '/' || !use_chdir) { 2578 /* full path, no chdir */ 2579 } else if(cfg->directory && cfg->directory[0]) { 2580 /* prepend chdir */ 2581 if(slashit && cfg->directory[0] != '/') 2582 len++; 2583 if(cfg->chrootdir && cfg->chrootdir[0] && 2584 strncmp(cfg->chrootdir, cfg->directory, 2585 strlen(cfg->chrootdir)) == 0) 2586 len += strlen(cfg->directory)-strlen(cfg->chrootdir); 2587 else len += strlen(cfg->directory); 2588 slashit = 1; 2589 } 2590 /* fname */ 2591 if(slashit && fname[0] != '/') 2592 len++; 2593 len += strlen(fname); 2594 return len; 2595 } 2596 2597 char* 2598 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) 2599 { 2600 size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1; 2601 int slashit = 0; 2602 char* buf = (char*)malloc(len); 2603 if(!buf) 2604 return NULL; 2605 buf[0] = 0; 2606 /* is fname already in chroot ? */ 2607 if(cfg->chrootdir && cfg->chrootdir[0] && 2608 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { 2609 /* already full pathname, return it */ 2610 (void)strlcpy(buf, fname, len); 2611 buf[len-1] = 0; 2612 return buf; 2613 } 2614 /* chroot */ 2615 if(cfg->chrootdir && cfg->chrootdir[0]) { 2616 /* start with chrootdir */ 2617 (void)strlcpy(buf, cfg->chrootdir, len); 2618 slashit = 1; 2619 } 2620 #ifdef UB_ON_WINDOWS 2621 if(fname[0] != 0 && fname[1] == ':') { 2622 /* full path, no chdir */ 2623 } else 2624 #endif 2625 /* chdir */ 2626 if(fname[0] == '/' || !use_chdir) { 2627 /* full path, no chdir */ 2628 } else if(cfg->directory && cfg->directory[0]) { 2629 /* prepend chdir */ 2630 if(slashit && cfg->directory[0] != '/') 2631 (void)strlcat(buf, "/", len); 2632 /* is the directory already in the chroot? */ 2633 if(cfg->chrootdir && cfg->chrootdir[0] && 2634 strncmp(cfg->chrootdir, cfg->directory, 2635 strlen(cfg->chrootdir)) == 0) 2636 (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir), 2637 len); 2638 else (void)strlcat(buf, cfg->directory, len); 2639 slashit = 1; 2640 } 2641 /* fname */ 2642 if(slashit && fname[0] != '/') 2643 (void)strlcat(buf, "/", len); 2644 (void)strlcat(buf, fname, len); 2645 buf[len-1] = 0; 2646 return buf; 2647 } 2648 2649 /** return next space character in string */ 2650 static char* next_space_pos(const char* str) 2651 { 2652 char* sp = strchr(str, ' '); 2653 char* tab = strchr(str, '\t'); 2654 if(!tab && !sp) 2655 return NULL; 2656 if(!sp) return tab; 2657 if(!tab) return sp; 2658 return (sp<tab)?sp:tab; 2659 } 2660 2661 /** return last space character in string */ 2662 static char* last_space_pos(const char* str) 2663 { 2664 char* sp = strrchr(str, ' '); 2665 char* tab = strrchr(str, '\t'); 2666 if(!tab && !sp) 2667 return NULL; 2668 if(!sp) return tab; 2669 if(!tab) return sp; 2670 return (sp>tab)?sp:tab; 2671 } 2672 2673 int 2674 cfg_parse_local_zone(struct config_file* cfg, const char* val) 2675 { 2676 const char *type, *name_end, *name; 2677 char buf[256]; 2678 2679 /* parse it as: [zone_name] [between stuff] [zone_type] */ 2680 name = val; 2681 while(*name && isspace((unsigned char)*name)) 2682 name++; 2683 if(!*name) { 2684 log_err("syntax error: too short: %s", val); 2685 return 0; 2686 } 2687 name_end = next_space_pos(name); 2688 if(!name_end || !*name_end) { 2689 log_err("syntax error: expected zone type: %s", val); 2690 return 0; 2691 } 2692 if (name_end - name > 255) { 2693 log_err("syntax error: bad zone name: %s", val); 2694 return 0; 2695 } 2696 (void)strlcpy(buf, name, sizeof(buf)); 2697 buf[name_end-name] = '\0'; 2698 2699 type = last_space_pos(name_end); 2700 while(type && *type && isspace((unsigned char)*type)) 2701 type++; 2702 if(!type || !*type) { 2703 log_err("syntax error: expected zone type: %s", val); 2704 return 0; 2705 } 2706 2707 if(strcmp(type, "nodefault")==0) { 2708 return cfg_strlist_insert(&cfg->local_zones_nodefault, 2709 strdup(name)); 2710 #ifdef USE_IPSET 2711 } else if(strcmp(type, "ipset")==0) { 2712 return cfg_strlist_insert(&cfg->local_zones_ipset, 2713 strdup(name)); 2714 #endif 2715 } else { 2716 return cfg_str2list_insert(&cfg->local_zones, strdup(buf), 2717 strdup(type)); 2718 } 2719 } 2720 2721 char* cfg_ptr_reverse(char* str) 2722 { 2723 char* ip, *ip_end; 2724 char* name; 2725 char* result; 2726 char buf[1024]; 2727 struct sockaddr_storage addr; 2728 socklen_t addrlen; 2729 2730 /* parse it as: [IP] [between stuff] [name] */ 2731 ip = str; 2732 while(*ip && isspace((unsigned char)*ip)) 2733 ip++; 2734 if(!*ip) { 2735 log_err("syntax error: too short: %s", str); 2736 return NULL; 2737 } 2738 ip_end = next_space_pos(ip); 2739 if(!ip_end || !*ip_end) { 2740 log_err("syntax error: expected name: %s", str); 2741 return NULL; 2742 } 2743 2744 name = last_space_pos(ip_end); 2745 if(!name || !*name) { 2746 log_err("syntax error: expected name: %s", str); 2747 return NULL; 2748 } 2749 2750 sscanf(ip, "%100s", buf); 2751 buf[sizeof(buf)-1]=0; 2752 2753 if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) { 2754 log_err("syntax error: cannot parse address: %s", str); 2755 return NULL; 2756 } 2757 2758 /* reverse IPv4: 2759 * ddd.ddd.ddd.ddd.in-addr-arpa. 2760 * IPv6: (h.){32}.ip6.arpa. */ 2761 2762 if(addr_is_ip6(&addr, addrlen)) { 2763 uint8_t ad[16]; 2764 const char* hex = "0123456789abcdef"; 2765 char *p = buf; 2766 int i; 2767 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr, 2768 sizeof(ad)); 2769 for(i=15; i>=0; i--) { 2770 uint8_t b = ad[i]; 2771 *p++ = hex[ (b&0x0f) ]; 2772 *p++ = '.'; 2773 *p++ = hex[ (b&0xf0) >> 4 ]; 2774 *p++ = '.'; 2775 } 2776 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. "); 2777 } else { 2778 uint8_t ad[4]; 2779 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr, 2780 sizeof(ad)); 2781 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ", 2782 (unsigned)ad[3], (unsigned)ad[2], 2783 (unsigned)ad[1], (unsigned)ad[0]); 2784 } 2785 2786 /* printed the reverse address, now the between goop and name on end */ 2787 while(*ip_end && isspace((unsigned char)*ip_end)) 2788 ip_end++; 2789 if(name>ip_end) { 2790 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s", 2791 (int)(name-ip_end), ip_end); 2792 } 2793 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name); 2794 2795 result = strdup(buf); 2796 if(!result) { 2797 log_err("out of memory parsing %s", str); 2798 return NULL; 2799 } 2800 return result; 2801 } 2802 2803 #ifdef UB_ON_WINDOWS 2804 char* 2805 w_lookup_reg_str(const char* key, const char* name) 2806 { 2807 HKEY hk = NULL; 2808 DWORD type = 0; 2809 BYTE buf[1024]; 2810 DWORD len = (DWORD)sizeof(buf); 2811 LONG ret; 2812 char* result = NULL; 2813 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk); 2814 if(ret == ERROR_FILE_NOT_FOUND) 2815 return NULL; /* key does not exist */ 2816 else if(ret != ERROR_SUCCESS) { 2817 log_err("RegOpenKeyEx failed"); 2818 return NULL; 2819 } 2820 ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len); 2821 if(RegCloseKey(hk)) 2822 log_err("RegCloseKey"); 2823 if(ret == ERROR_FILE_NOT_FOUND) 2824 return NULL; /* name does not exist */ 2825 else if(ret != ERROR_SUCCESS) { 2826 log_err("RegQueryValueEx failed"); 2827 return NULL; 2828 } 2829 if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) { 2830 buf[sizeof(buf)-1] = 0; 2831 buf[sizeof(buf)-2] = 0; /* for multi_sz */ 2832 result = strdup((char*)buf); 2833 if(!result) log_err("out of memory"); 2834 } 2835 return result; 2836 } 2837 2838 void w_config_adjust_directory(struct config_file* cfg) 2839 { 2840 if(cfg->directory && cfg->directory[0]) { 2841 TCHAR dirbuf[2*MAX_PATH+4]; 2842 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) { 2843 /* get executable path, and if that contains 2844 * directories, snip off the filename part */ 2845 dirbuf[0] = 0; 2846 if(!GetModuleFileName(NULL, dirbuf, MAX_PATH)) 2847 log_err("could not GetModuleFileName"); 2848 if(strrchr(dirbuf, '\\')) { 2849 (strrchr(dirbuf, '\\'))[0] = 0; 2850 } else log_err("GetModuleFileName had no path"); 2851 if(dirbuf[0]) { 2852 /* adjust directory for later lookups to work*/ 2853 free(cfg->directory); 2854 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1); 2855 } 2856 } 2857 } 2858 } 2859 #endif /* UB_ON_WINDOWS */ 2860 2861 int options_remote_is_address(struct config_file* cfg) 2862 { 2863 if(!cfg->remote_control_enable) return 0; 2864 if(!cfg->control_ifs.first) return 1; 2865 if(!cfg->control_ifs.first->str) return 1; 2866 if(cfg->control_ifs.first->str[0] == 0) return 1; 2867 return (cfg->control_ifs.first->str[0] != '/'); 2868 } 2869 2870 int 2871 if_listens_on(const char* ifname, int default_port, int port, 2872 struct config_strlist* additional_ports) 2873 { 2874 struct config_strlist* s; 2875 char* p = strchr(ifname, '@'); 2876 int if_port; 2877 if(p) if_port = atoi(p+1); 2878 else if_port = default_port; 2879 2880 if(port && if_port == port) return 1; 2881 2882 for(s = additional_ports; s; s = s->next) { 2883 if(if_port == atoi(s->str)) return 1; 2884 } 2885 return 0; 2886 } 2887 2888 int 2889 if_is_ssl(const char* ifname, int default_port, int ssl_port, 2890 struct config_strlist* tls_additional_port) 2891 { 2892 return if_listens_on(ifname, default_port, ssl_port, 2893 tls_additional_port); 2894 } 2895 2896 int 2897 if_is_pp2(const char* ifname, int default_port, 2898 struct config_strlist* proxy_protocol_port) 2899 { 2900 return if_listens_on(ifname, default_port, 0, proxy_protocol_port); 2901 } 2902 2903 int 2904 if_is_https(const char* ifname, int default_port, int https_port) 2905 { 2906 return if_listens_on(ifname, default_port, https_port, NULL); 2907 } 2908 2909 int 2910 if_is_dnscrypt(const char* ifname, int default_port, int dnscrypt_port) 2911 { 2912 #ifdef USE_DNSCRYPT 2913 return if_listens_on(ifname, default_port, dnscrypt_port, NULL); 2914 #else 2915 (void)ifname; 2916 (void)default_port; 2917 (void)dnscrypt_port; 2918 return 0; 2919 #endif 2920 } 2921 2922 size_t 2923 getmem_str(char* str) 2924 { 2925 if(!str) return 0; 2926 return strlen(str)+1; 2927 } 2928 2929 int 2930 if_is_quic(const char* ifname, int default_port, int quic_port) 2931 { 2932 #ifdef HAVE_NGTCP2 2933 return if_listens_on(ifname, default_port, quic_port, NULL); 2934 #else 2935 (void)ifname; 2936 (void)default_port; 2937 (void)quic_port; 2938 return 0; 2939 #endif 2940 } 2941 2942 int 2943 cfg_ports_list_contains(char* ports, int p) 2944 { 2945 char* now = ports, *after; 2946 int extraport; 2947 while(now && *now) { 2948 while(isspace((unsigned char)*now)) 2949 now++; 2950 if(!now) 2951 break; 2952 after = now; 2953 extraport = (int)strtol(now, &after, 10); 2954 if(extraport < 0 || extraport > 65535) 2955 continue; /* Out of range. */ 2956 if(extraport == 0 && now == after) 2957 return 0; /* Number could not be parsed. */ 2958 now = after; 2959 if(extraport == p) 2960 return 1; 2961 } 2962 return 0; 2963 } 2964 2965 int 2966 cfg_has_https(struct config_file* cfg) 2967 { 2968 int i; 2969 for(i = 0; i<cfg->num_ifs; i++) { 2970 if(if_is_https(cfg->ifs[i], cfg->port, cfg->https_port)) 2971 return 1; 2972 } 2973 if(cfg_ports_list_contains(cfg->if_automatic_ports, cfg->https_port)) 2974 return 1; 2975 return 0; 2976 } 2977 2978 int 2979 cfg_has_quic(struct config_file* cfg) 2980 { 2981 #ifdef HAVE_NGTCP2 2982 int i; 2983 for(i = 0; i<cfg->num_ifs; i++) { 2984 if(if_is_quic(cfg->ifs[i], cfg->port, cfg->quic_port)) 2985 return 1; 2986 } 2987 if(cfg_ports_list_contains(cfg->if_automatic_ports, cfg->quic_port)) 2988 return 1; 2989 return 0; 2990 #else 2991 (void)cfg; 2992 return 0; 2993 #endif 2994 } 2995 2996 int 2997 cfg_tls_protocols_is_valid(const char* tls_protocols) 2998 { 2999 const char* s = tls_protocols; 3000 while(*s && isspace((unsigned char)*s)) s++; 3001 while(*s && !isspace((unsigned char)*s)) { 3002 if(strncmp(s, "TLSv1.2", 7) == 0 || 3003 strncmp(s, "TLSv1.3", 7) == 0) { 3004 s += 7; 3005 if(*s && !isspace((unsigned char)*s)) { 3006 /* something is attached; fail */ 3007 return 0; 3008 } 3009 while(*s && isspace((unsigned char)*s)) 3010 s++; 3011 continue; 3012 } 3013 return 0; 3014 } 3015 return 1; 3016 } 3017 3018 void 3019 cfg_tls_protocols_allowed(const char* tls_protocols, int* allow12, int* allow13) 3020 { 3021 const char* s = tls_protocols; 3022 *allow12 = 0; 3023 *allow13 = 0; 3024 if(tls_protocols == NULL) return; 3025 while(*s && isspace((unsigned char)*s)) s++; 3026 while(*s && !isspace((unsigned char)*s)) { 3027 if(strncmp(s, "TLSv1.2", 7) == 0) { 3028 *allow12 = 1; 3029 s += 7; 3030 } else if(strncmp(s, "TLSv1.3", 7) == 0) { 3031 *allow13 = 1; 3032 s += 7; 3033 } else { 3034 /* Unknown word, this should never happen but skip to 3035 * be safe */ 3036 while(*s && !isspace((unsigned char)*s)) 3037 s++; 3038 } 3039 while(*s && isspace((unsigned char)*s)) 3040 s++; 3041 } 3042 } 3043 3044 int 3045 file_get_mtime(const char* file, time_t* mtime, long* ns, int* nonexist) 3046 { 3047 struct stat s; 3048 if(stat(file, &s) != 0) { 3049 *mtime = 0; 3050 *ns = 0; 3051 if(nonexist) 3052 *nonexist = (errno == ENOENT); 3053 return 0; 3054 } 3055 if(nonexist) 3056 *nonexist = 0; 3057 *mtime = s.st_mtime; 3058 #ifdef HAVE_STRUCT_STAT_ST_MTIMENSEC 3059 *ns = s.st_mtimensec; 3060 #elif defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC) 3061 *ns = s.st_mtim.tv_nsec; 3062 #else 3063 *ns = 0; 3064 #endif 3065 return 1; 3066 } 3067
Indexes created Sun Jun 14 00:25:39 UTC 2026