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