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