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