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 #ifdef HAVE_TIME_H 46 #include <time.h> 47 #endif 48 #include "util/log.h" 49 #include "util/configyyrename.h" 50 #include "util/config_file.h" 51 #include "configparser.h" 52 #include "util/net_help.h" 53 #include "util/data/msgparse.h" 54 #include "util/module.h" 55 #include "util/regional.h" 56 #include "util/fptr_wlist.h" 57 #include "util/data/dname.h" 58 #include "util/rtt.h" 59 #include "services/cache/infra.h" 60 #include "sldns/wire2str.h" 61 #include "sldns/parseutil.h" 62 #include "iterator/iterator.h" 63 #ifdef HAVE_GLOB_H 64 # include <glob.h> 65 #endif 66 #ifdef CLIENT_SUBNET 67 #include "edns-subnet/edns-subnet.h" 68 #endif 69 #ifdef HAVE_PWD_H 70 #include <pwd.h> 71 #endif 72 73 /** from cfg username, after daemonize setup performed */ 74 uid_t cfg_uid = (uid_t)-1; 75 /** from cfg username, after daemonize setup performed */ 76 gid_t cfg_gid = (gid_t)-1; 77 /** for debug allow small timeout values for fast rollovers */ 78 int autr_permit_small_holddown = 0; 79 /** size (in bytes) of stream wait buffers max */ 80 size_t stream_wait_max = 4 * 1024 * 1024; 81 size_t http2_query_buffer_max = 4 * 1024 * 1024; 82 size_t http2_response_buffer_max = 4 * 1024 * 1024; 83 84 /** global config during parsing */ 85 struct config_parser_state* cfg_parser = 0; 86 87 /** init ports possible for use */ 88 static void init_outgoing_availports(int* array, int num); 89 90 struct config_file* 91 config_create(void) 92 { 93 struct config_file* cfg; 94 cfg = (struct config_file*)calloc(1, sizeof(struct config_file)); 95 if(!cfg) 96 return NULL; 97 /* the defaults if no config is present */ 98 cfg->verbosity = 1; 99 cfg->stat_interval = 0; 100 cfg->stat_cumulative = 0; 101 cfg->stat_extended = 0; 102 cfg->num_threads = 1; 103 cfg->port = UNBOUND_DNS_PORT; 104 cfg->do_ip4 = 1; 105 cfg->do_ip6 = 1; 106 cfg->do_udp = 1; 107 cfg->do_tcp = 1; 108 cfg->tcp_reuse_timeout = 60 * 1000; /* 60s in milisecs */ 109 cfg->max_reuse_tcp_queries = 200; 110 cfg->tcp_upstream = 0; 111 cfg->udp_upstream_without_downstream = 0; 112 cfg->tcp_mss = 0; 113 cfg->outgoing_tcp_mss = 0; 114 cfg->tcp_idle_timeout = 30 * 1000; /* 30s in millisecs */ 115 cfg->tcp_auth_query_timeout = 3 * 1000; /* 3s in millisecs */ 116 cfg->do_tcp_keepalive = 0; 117 cfg->tcp_keepalive_timeout = 120 * 1000; /* 120s in millisecs */ 118 cfg->ssl_service_key = NULL; 119 cfg->ssl_service_pem = NULL; 120 cfg->ssl_port = UNBOUND_DNS_OVER_TLS_PORT; 121 cfg->ssl_upstream = 0; 122 cfg->tls_cert_bundle = NULL; 123 cfg->tls_win_cert = 0; 124 cfg->tls_use_sni = 1; 125 cfg->https_port = UNBOUND_DNS_OVER_HTTPS_PORT; 126 if(!(cfg->http_endpoint = strdup("/dns-query"))) goto error_exit; 127 cfg->http_max_streams = 100; 128 cfg->http_query_buffer_size = 4*1024*1024; 129 cfg->http_response_buffer_size = 4*1024*1024; 130 cfg->http_nodelay = 1; 131 cfg->use_syslog = 1; 132 cfg->log_identity = NULL; /* changed later with argv[0] */ 133 cfg->log_time_ascii = 0; 134 cfg->log_queries = 0; 135 cfg->log_replies = 0; 136 cfg->log_tag_queryreply = 0; 137 cfg->log_local_actions = 0; 138 cfg->log_servfail = 0; 139 #ifndef USE_WINSOCK 140 # ifdef USE_MINI_EVENT 141 /* select max 1024 sockets */ 142 cfg->outgoing_num_ports = 960; 143 cfg->num_queries_per_thread = 512; 144 # else 145 /* libevent can use many sockets */ 146 cfg->outgoing_num_ports = 4096; 147 cfg->num_queries_per_thread = 1024; 148 # endif 149 cfg->outgoing_num_tcp = 10; 150 cfg->incoming_num_tcp = 10; 151 #else 152 cfg->outgoing_num_ports = 48; /* windows is limited in num fds */ 153 cfg->num_queries_per_thread = 24; 154 cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */ 155 cfg->incoming_num_tcp = 2; 156 #endif 157 cfg->stream_wait_size = 4 * 1024 * 1024; 158 cfg->edns_buffer_size = 1232; /* from DNS flagday recommendation */ 159 cfg->msg_buffer_size = 65552; /* 64 k + a small margin */ 160 cfg->msg_cache_size = 4 * 1024 * 1024; 161 cfg->msg_cache_slabs = 4; 162 cfg->jostle_time = 200; 163 cfg->rrset_cache_size = 4 * 1024 * 1024; 164 cfg->rrset_cache_slabs = 4; 165 cfg->host_ttl = 900; 166 cfg->bogus_ttl = 60; 167 cfg->min_ttl = 0; 168 cfg->max_ttl = 3600 * 24; 169 cfg->max_negative_ttl = 3600; 170 cfg->prefetch = 0; 171 cfg->prefetch_key = 0; 172 cfg->deny_any = 0; 173 cfg->infra_cache_slabs = 4; 174 cfg->infra_cache_numhosts = 10000; 175 cfg->infra_cache_min_rtt = 50; 176 cfg->infra_keep_probing = 0; 177 cfg->delay_close = 0; 178 cfg->udp_connect = 1; 179 if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int)))) 180 goto error_exit; 181 init_outgoing_availports(cfg->outgoing_avail_ports, 65536); 182 if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit; 183 #ifdef HAVE_CHROOT 184 if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit; 185 #endif 186 if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit; 187 if(!(cfg->logfile = strdup(""))) goto error_exit; 188 if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit; 189 if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit; 190 cfg->fast_server_permil = 0; 191 cfg->fast_server_num = 3; 192 cfg->donotqueryaddrs = NULL; 193 cfg->donotquery_localhost = 1; 194 cfg->root_hints = NULL; 195 cfg->use_systemd = 0; 196 cfg->do_daemonize = 1; 197 cfg->if_automatic = 0; 198 cfg->so_rcvbuf = 0; 199 cfg->so_sndbuf = 0; 200 cfg->so_reuseport = REUSEPORT_DEFAULT; 201 cfg->ip_transparent = 0; 202 cfg->ip_freebind = 0; 203 cfg->ip_dscp = 0; 204 cfg->num_ifs = 0; 205 cfg->ifs = NULL; 206 cfg->num_out_ifs = 0; 207 cfg->out_ifs = NULL; 208 cfg->stubs = NULL; 209 cfg->forwards = NULL; 210 cfg->auths = NULL; 211 #ifdef CLIENT_SUBNET 212 cfg->client_subnet = NULL; 213 cfg->client_subnet_zone = NULL; 214 cfg->client_subnet_opcode = LDNS_EDNS_CLIENT_SUBNET; 215 cfg->client_subnet_always_forward = 0; 216 cfg->max_client_subnet_ipv4 = 24; 217 cfg->max_client_subnet_ipv6 = 56; 218 cfg->min_client_subnet_ipv4 = 0; 219 cfg->min_client_subnet_ipv6 = 0; 220 cfg->max_ecs_tree_size_ipv4 = 100; 221 cfg->max_ecs_tree_size_ipv6 = 100; 222 #endif 223 cfg->views = NULL; 224 cfg->acls = NULL; 225 cfg->tcp_connection_limits = NULL; 226 cfg->harden_short_bufsize = 1; 227 cfg->harden_large_queries = 0; 228 cfg->harden_glue = 1; 229 cfg->harden_dnssec_stripped = 1; 230 cfg->harden_below_nxdomain = 1; 231 cfg->harden_referral_path = 0; 232 cfg->harden_algo_downgrade = 0; 233 cfg->use_caps_bits_for_id = 0; 234 cfg->caps_whitelist = NULL; 235 cfg->private_address = NULL; 236 cfg->private_domain = NULL; 237 cfg->unwanted_threshold = 0; 238 cfg->hide_identity = 0; 239 cfg->hide_version = 0; 240 cfg->hide_trustanchor = 0; 241 cfg->hide_http_user_agent = 0; 242 cfg->identity = NULL; 243 cfg->version = NULL; 244 cfg->http_user_agent = NULL; 245 cfg->nsid_cfg_str = NULL; 246 cfg->nsid = NULL; 247 cfg->nsid_len = 0; 248 cfg->auto_trust_anchor_file_list = NULL; 249 cfg->trust_anchor_file_list = NULL; 250 cfg->trust_anchor_list = NULL; 251 cfg->trusted_keys_file_list = NULL; 252 cfg->trust_anchor_signaling = 1; 253 cfg->root_key_sentinel = 1; 254 cfg->domain_insecure = NULL; 255 cfg->val_date_override = 0; 256 cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */ 257 cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */ 258 cfg->val_max_restart = 5; 259 cfg->val_clean_additional = 1; 260 cfg->val_log_level = 0; 261 cfg->val_log_squelch = 0; 262 cfg->val_permissive_mode = 0; 263 cfg->aggressive_nsec = 0; 264 cfg->ignore_cd = 0; 265 cfg->serve_expired = 0; 266 cfg->serve_expired_ttl = 0; 267 cfg->serve_expired_ttl_reset = 0; 268 cfg->serve_expired_reply_ttl = 30; 269 cfg->serve_expired_client_timeout = 0; 270 cfg->serve_original_ttl = 0; 271 cfg->zonemd_permissive_mode = 0; 272 cfg->add_holddown = 30*24*3600; 273 cfg->del_holddown = 30*24*3600; 274 cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */ 275 cfg->permit_small_holddown = 0; 276 cfg->key_cache_size = 4 * 1024 * 1024; 277 cfg->key_cache_slabs = 4; 278 cfg->neg_cache_size = 1 * 1024 * 1024; 279 cfg->local_zones = NULL; 280 cfg->local_zones_nodefault = NULL; 281 #ifdef USE_IPSET 282 cfg->local_zones_ipset = NULL; 283 #endif 284 cfg->local_zones_disable_default = 0; 285 cfg->local_data = NULL; 286 cfg->local_zone_overrides = NULL; 287 cfg->unblock_lan_zones = 0; 288 cfg->insecure_lan_zones = 0; 289 cfg->python_script = NULL; 290 cfg->dynlib_file = NULL; 291 cfg->remote_control_enable = 0; 292 cfg->control_ifs.first = NULL; 293 cfg->control_ifs.last = NULL; 294 cfg->control_port = UNBOUND_CONTROL_PORT; 295 cfg->control_use_cert = 1; 296 cfg->minimal_responses = 1; 297 cfg->rrset_roundrobin = 1; 298 cfg->unknown_server_time_limit = 376; 299 cfg->max_udp_size = 4096; 300 if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key"))) 301 goto error_exit; 302 if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem"))) 303 goto error_exit; 304 if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key"))) 305 goto error_exit; 306 if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem"))) 307 goto error_exit; 308 309 #ifdef CLIENT_SUBNET 310 if(!(cfg->module_conf = strdup("subnetcache validator iterator"))) goto error_exit; 311 #else 312 if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit; 313 #endif 314 if(!(cfg->val_nsec3_key_iterations = 315 strdup("1024 150 2048 150 4096 150"))) goto error_exit; 316 #if defined(DNSTAP_SOCKET_PATH) 317 if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH))) 318 goto error_exit; 319 #endif 320 cfg->dnstap_bidirectional = 1; 321 cfg->dnstap_tls = 1; 322 cfg->disable_dnssec_lame_check = 0; 323 cfg->ip_ratelimit = 0; 324 cfg->ratelimit = 0; 325 cfg->ip_ratelimit_slabs = 4; 326 cfg->ratelimit_slabs = 4; 327 cfg->ip_ratelimit_size = 4*1024*1024; 328 cfg->ratelimit_size = 4*1024*1024; 329 cfg->ratelimit_for_domain = NULL; 330 cfg->ratelimit_below_domain = NULL; 331 cfg->ip_ratelimit_factor = 10; 332 cfg->ratelimit_factor = 10; 333 cfg->qname_minimisation = 1; 334 cfg->qname_minimisation_strict = 0; 335 cfg->shm_enable = 0; 336 cfg->shm_key = 11777; 337 cfg->edns_client_strings = NULL; 338 cfg->edns_client_string_opcode = 65001; 339 cfg->dnscrypt = 0; 340 cfg->dnscrypt_port = 0; 341 cfg->dnscrypt_provider = NULL; 342 cfg->dnscrypt_provider_cert = NULL; 343 cfg->dnscrypt_provider_cert_rotated = NULL; 344 cfg->dnscrypt_secret_key = NULL; 345 cfg->dnscrypt_shared_secret_cache_size = 4*1024*1024; 346 cfg->dnscrypt_shared_secret_cache_slabs = 4; 347 cfg->dnscrypt_nonce_cache_size = 4*1024*1024; 348 cfg->dnscrypt_nonce_cache_slabs = 4; 349 cfg->pad_responses = 1; 350 cfg->pad_responses_block_size = 468; /* from RFC8467 */ 351 cfg->pad_queries = 1; 352 cfg->pad_queries_block_size = 128; /* from RFC8467 */ 353 #ifdef USE_IPSECMOD 354 cfg->ipsecmod_enabled = 1; 355 cfg->ipsecmod_ignore_bogus = 0; 356 cfg->ipsecmod_hook = NULL; 357 cfg->ipsecmod_max_ttl = 3600; 358 cfg->ipsecmod_whitelist = NULL; 359 cfg->ipsecmod_strict = 0; 360 #endif 361 #ifdef USE_CACHEDB 362 if(!(cfg->cachedb_backend = strdup("testframe"))) goto error_exit; 363 if(!(cfg->cachedb_secret = strdup("default"))) goto error_exit; 364 #ifdef USE_REDIS 365 if(!(cfg->redis_server_host = strdup("127.0.0.1"))) goto error_exit; 366 cfg->redis_timeout = 100; 367 cfg->redis_server_port = 6379; 368 cfg->redis_expire_records = 0; 369 #endif /* USE_REDIS */ 370 #endif /* USE_CACHEDB */ 371 #ifdef USE_IPSET 372 cfg->ipset_name_v4 = NULL; 373 cfg->ipset_name_v6 = NULL; 374 #endif 375 return cfg; 376 error_exit: 377 config_delete(cfg); 378 return NULL; 379 } 380 381 struct config_file* config_create_forlib(void) 382 { 383 struct config_file* cfg = config_create(); 384 if(!cfg) return NULL; 385 /* modifications for library use, less verbose, less memory */ 386 free(cfg->chrootdir); 387 cfg->chrootdir = NULL; 388 cfg->verbosity = 0; 389 cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable' 390 and probably within the ulimit(maxfds) of the user */ 391 cfg->outgoing_num_tcp = 2; 392 cfg->msg_cache_size = 1024*1024; 393 cfg->msg_cache_slabs = 1; 394 cfg->rrset_cache_size = 1024*1024; 395 cfg->rrset_cache_slabs = 1; 396 cfg->infra_cache_slabs = 1; 397 cfg->use_syslog = 0; 398 cfg->key_cache_size = 1024*1024; 399 cfg->key_cache_slabs = 1; 400 cfg->neg_cache_size = 100 * 1024; 401 cfg->donotquery_localhost = 0; /* allow, so that you can ask a 402 forward nameserver running on localhost */ 403 cfg->val_log_level = 2; /* to fill why_bogus with */ 404 cfg->val_log_squelch = 1; 405 cfg->minimal_responses = 0; 406 cfg->harden_short_bufsize = 1; 407 return cfg; 408 } 409 410 /** check that the value passed is >= 0 */ 411 #define IS_NUMBER_OR_ZERO \ 412 if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0 413 /** check that the value passed is > 0 */ 414 #define IS_NONZERO_NUMBER \ 415 if(atoi(val) == 0) return 0 416 /** check that the value passed is not 0 and a power of 2 */ 417 #define IS_POW2_NUMBER \ 418 if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0 419 /** check that the value passed is yes or no */ 420 #define IS_YES_OR_NO \ 421 if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0 422 /** put integer_or_zero into variable */ 423 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 424 { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); } 425 /** put integer_nonzero into variable */ 426 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \ 427 { IS_NONZERO_NUMBER; cfg->var = atoi(val); } 428 /** put integer_or_zero into unsigned */ 429 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 430 { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); } 431 /** put integer_or_zero into size_t */ 432 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 433 { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); } 434 /** put integer_nonzero into size_t */ 435 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \ 436 { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); } 437 /** put yesno into variable */ 438 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \ 439 { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); } 440 /** put memsize into variable */ 441 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \ 442 { return cfg_parse_memsize(val, &cfg->var); } 443 /** put pow2 number into variable */ 444 #define S_POW2(str, var) if(strcmp(opt, str)==0) \ 445 { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); } 446 /** put string into variable */ 447 #define S_STR(str, var) if(strcmp(opt, str)==0) \ 448 { free(cfg->var); return (cfg->var = strdup(val)) != NULL; } 449 /** put string into strlist */ 450 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \ 451 { return cfg_strlist_insert(&cfg->var, strdup(val)); } 452 /** put string into strlist if not present yet*/ 453 #define S_STRLIST_UNIQ(str, var) if(strcmp(opt, str)==0) \ 454 { if(cfg_strlist_find(cfg->var, val)) { return 0;} \ 455 return cfg_strlist_insert(&cfg->var, strdup(val)); } 456 /** append string to strlist */ 457 #define S_STRLIST_APPEND(str, var) if(strcmp(opt, str)==0) \ 458 { return cfg_strlist_append(&cfg->var, strdup(val)); } 459 460 int config_set_option(struct config_file* cfg, const char* opt, 461 const char* val) 462 { 463 char buf[64]; 464 if(!opt) return 0; 465 if(opt[strlen(opt)-1] != ':' && strlen(opt)+2<sizeof(buf)) { 466 snprintf(buf, sizeof(buf), "%s:", opt); 467 opt = buf; 468 } 469 S_NUMBER_OR_ZERO("verbosity:", verbosity) 470 else if(strcmp(opt, "statistics-interval:") == 0) { 471 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0) 472 cfg->stat_interval = 0; 473 else if(atoi(val) == 0) 474 return 0; 475 else cfg->stat_interval = atoi(val); 476 } else if(strcmp(opt, "num_threads:") == 0) { 477 /* not supported, library must have 1 thread in bgworker */ 478 return 0; 479 } else if(strcmp(opt, "outgoing-port-permit:") == 0) { 480 return cfg_mark_ports(val, 1, 481 cfg->outgoing_avail_ports, 65536); 482 } else if(strcmp(opt, "outgoing-port-avoid:") == 0) { 483 return cfg_mark_ports(val, 0, 484 cfg->outgoing_avail_ports, 65536); 485 } else if(strcmp(opt, "local-zone:") == 0) { 486 return cfg_parse_local_zone(cfg, val); 487 } else if(strcmp(opt, "val-override-date:") == 0) { 488 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) { 489 cfg->val_date_override = 0; 490 } else if(strlen(val) == 14) { 491 cfg->val_date_override = cfg_convert_timeval(val); 492 return cfg->val_date_override != 0; 493 } else { 494 if(atoi(val) == 0) return 0; 495 cfg->val_date_override = (uint32_t)atoi(val); 496 } 497 } else if(strcmp(opt, "local-data-ptr:") == 0) { 498 char* ptr = cfg_ptr_reverse((char*)opt); 499 return cfg_strlist_insert(&cfg->local_data, ptr); 500 } else if(strcmp(opt, "logfile:") == 0) { 501 cfg->use_syslog = 0; 502 free(cfg->logfile); 503 return (cfg->logfile = strdup(val)) != NULL; 504 } 505 else if(strcmp(opt, "log-time-ascii:") == 0) 506 { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0); 507 log_set_time_asc(cfg->log_time_ascii); } 508 else S_SIZET_NONZERO("max-udp-size:", max_udp_size) 509 else S_YNO("use-syslog:", use_syslog) 510 else S_STR("log-identity:", log_identity) 511 else S_YNO("extended-statistics:", stat_extended) 512 else S_YNO("statistics-cumulative:", stat_cumulative) 513 else S_YNO("shm-enable:", shm_enable) 514 else S_NUMBER_OR_ZERO("shm-key:", shm_key) 515 else S_YNO("do-ip4:", do_ip4) 516 else S_YNO("do-ip6:", do_ip6) 517 else S_YNO("do-udp:", do_udp) 518 else S_YNO("do-tcp:", do_tcp) 519 else S_YNO("prefer-ip4:", prefer_ip4) 520 else S_YNO("prefer-ip6:", prefer_ip6) 521 else S_YNO("tcp-upstream:", tcp_upstream) 522 else S_YNO("udp-upstream-without-downstream:", 523 udp_upstream_without_downstream) 524 else S_NUMBER_NONZERO("tcp-mss:", tcp_mss) 525 else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss) 526 else S_NUMBER_NONZERO("tcp-auth-query-timeout:", tcp_auth_query_timeout) 527 else S_NUMBER_NONZERO("tcp-idle-timeout:", tcp_idle_timeout) 528 else S_NUMBER_NONZERO("max-reuse-tcp-queries:", max_reuse_tcp_queries) 529 else S_NUMBER_NONZERO("tcp-reuse-timeout:", tcp_reuse_timeout) 530 else S_YNO("edns-tcp-keepalive:", do_tcp_keepalive) 531 else S_NUMBER_NONZERO("edns-tcp-keepalive-timeout:", tcp_keepalive_timeout) 532 else S_YNO("ssl-upstream:", ssl_upstream) 533 else S_STR("ssl-service-key:", ssl_service_key) 534 else S_STR("ssl-service-pem:", ssl_service_pem) 535 else S_NUMBER_NONZERO("ssl-port:", ssl_port) 536 else S_STR("tls-cert-bundle:", tls_cert_bundle) 537 else S_YNO("tls-win-cert:", tls_win_cert) 538 else S_STRLIST("additional-tls-port:", tls_additional_port) 539 else S_STRLIST("tls-additional-ports:", tls_additional_port) 540 else S_STRLIST("tls-additional-port:", tls_additional_port) 541 else S_STRLIST_APPEND("tls-session-ticket-keys:", tls_session_ticket_keys) 542 else S_STR("tls-ciphers:", tls_ciphers) 543 else S_STR("tls-ciphersuites:", tls_ciphersuites) 544 else S_YNO("tls-use-sni:", tls_use_sni) 545 else S_NUMBER_NONZERO("https-port:", https_port) 546 else S_STR("http-endpoint:", http_endpoint) 547 else S_NUMBER_NONZERO("http-max-streams:", http_max_streams) 548 else S_MEMSIZE("http-query-buffer-size:", http_query_buffer_size) 549 else S_MEMSIZE("http-response-buffer-size:", http_response_buffer_size) 550 else S_YNO("http-nodelay:", http_nodelay) 551 else S_YNO("http-notls-downstream:", http_notls_downstream) 552 else S_YNO("interface-automatic:", if_automatic) 553 else S_YNO("use-systemd:", use_systemd) 554 else S_YNO("do-daemonize:", do_daemonize) 555 else S_NUMBER_NONZERO("port:", port) 556 else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports) 557 else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp) 558 else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp) 559 else S_MEMSIZE("stream-wait-size:", stream_wait_size) 560 else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size) 561 else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size) 562 else S_MEMSIZE("msg-cache-size:", msg_cache_size) 563 else S_POW2("msg-cache-slabs:", msg_cache_slabs) 564 else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread) 565 else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time) 566 else S_MEMSIZE("so-rcvbuf:", so_rcvbuf) 567 else S_MEMSIZE("so-sndbuf:", so_sndbuf) 568 else S_YNO("so-reuseport:", so_reuseport) 569 else S_YNO("ip-transparent:", ip_transparent) 570 else S_YNO("ip-freebind:", ip_freebind) 571 else S_NUMBER_OR_ZERO("ip-dscp:", ip_dscp) 572 else S_MEMSIZE("rrset-cache-size:", rrset_cache_size) 573 else S_POW2("rrset-cache-slabs:", rrset_cache_slabs) 574 else S_YNO("prefetch:", prefetch) 575 else S_YNO("prefetch-key:", prefetch_key) 576 else S_YNO("deny-any:", deny_any) 577 else if(strcmp(opt, "cache-max-ttl:") == 0) 578 { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;} 579 else if(strcmp(opt, "cache-max-negative-ttl:") == 0) 580 { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;} 581 else if(strcmp(opt, "cache-min-ttl:") == 0) 582 { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;} 583 else if(strcmp(opt, "infra-cache-min-rtt:") == 0) { 584 IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val); 585 RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt; 586 } 587 else S_YNO("infra-keep-probing:", infra_keep_probing) 588 else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl) 589 else S_POW2("infra-cache-slabs:", infra_cache_slabs) 590 else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts) 591 else S_NUMBER_OR_ZERO("delay-close:", delay_close) 592 else S_YNO("udp-connect:", udp_connect) 593 else S_STR("chroot:", chrootdir) 594 else S_STR("username:", username) 595 else S_STR("directory:", directory) 596 else S_STR("pidfile:", pidfile) 597 else S_YNO("hide-identity:", hide_identity) 598 else S_YNO("hide-version:", hide_version) 599 else S_YNO("hide-trustanchor:", hide_trustanchor) 600 else S_YNO("hide-http-user-agent:", hide_http_user_agent) 601 else S_STR("identity:", identity) 602 else S_STR("version:", version) 603 else S_STR("http-user-agent:", http_user_agent) 604 else if(strcmp(opt, "nsid:") == 0) { 605 free(cfg->nsid_cfg_str); 606 if (!(cfg->nsid_cfg_str = strdup(val))) 607 return 0; 608 /* Empty string is just validly unsetting nsid */ 609 if (*val == 0) { 610 free(cfg->nsid); 611 cfg->nsid = NULL; 612 cfg->nsid_len = 0; 613 return 1; 614 } 615 cfg->nsid = cfg_parse_nsid(val, &cfg->nsid_len); 616 return cfg->nsid != NULL; 617 } 618 else S_STRLIST("root-hints:", root_hints) 619 else S_STR("target-fetch-policy:", target_fetch_policy) 620 else S_YNO("harden-glue:", harden_glue) 621 else S_YNO("harden-short-bufsize:", harden_short_bufsize) 622 else S_YNO("harden-large-queries:", harden_large_queries) 623 else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped) 624 else S_YNO("harden-below-nxdomain:", harden_below_nxdomain) 625 else S_YNO("harden-referral-path:", harden_referral_path) 626 else S_YNO("harden-algo-downgrade:", harden_algo_downgrade) 627 else S_YNO("use-caps-for-id:", use_caps_bits_for_id) 628 else S_STRLIST("caps-whitelist:", caps_whitelist) 629 else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold) 630 else S_STRLIST("private-address:", private_address) 631 else S_STRLIST("private-domain:", private_domain) 632 else S_YNO("do-not-query-localhost:", donotquery_localhost) 633 else S_STRLIST("do-not-query-address:", donotqueryaddrs) 634 else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list) 635 else S_STRLIST("trust-anchor-file:", trust_anchor_file_list) 636 else S_STRLIST("trust-anchor:", trust_anchor_list) 637 else S_STRLIST("trusted-keys-file:", trusted_keys_file_list) 638 else S_YNO("trust-anchor-signaling:", trust_anchor_signaling) 639 else S_YNO("root-key-sentinel:", root_key_sentinel) 640 else S_STRLIST("domain-insecure:", domain_insecure) 641 else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl) 642 else S_YNO("val-clean-additional:", val_clean_additional) 643 else S_NUMBER_OR_ZERO("val-log-level:", val_log_level) 644 else S_YNO("val-log-squelch:", val_log_squelch) 645 else S_YNO("log-queries:", log_queries) 646 else S_YNO("log-replies:", log_replies) 647 else S_YNO("log-tag-queryreply:", log_tag_queryreply) 648 else S_YNO("log-local-actions:", log_local_actions) 649 else S_YNO("log-servfail:", log_servfail) 650 else S_YNO("val-permissive-mode:", val_permissive_mode) 651 else S_YNO("aggressive-nsec:", aggressive_nsec) 652 else S_YNO("ignore-cd-flag:", ignore_cd) 653 else if(strcmp(opt, "serve-expired:") == 0) 654 { IS_YES_OR_NO; cfg->serve_expired = (strcmp(val, "yes") == 0); 655 SERVE_EXPIRED = cfg->serve_expired; } 656 else if(strcmp(opt, "serve-expired-ttl:") == 0) 657 { IS_NUMBER_OR_ZERO; cfg->serve_expired_ttl = atoi(val); SERVE_EXPIRED_TTL=(time_t)cfg->serve_expired_ttl;} 658 else S_YNO("serve-expired-ttl-reset:", serve_expired_ttl_reset) 659 else if(strcmp(opt, "serve-expired-reply-ttl:") == 0) 660 { IS_NUMBER_OR_ZERO; cfg->serve_expired_reply_ttl = atoi(val); SERVE_EXPIRED_REPLY_TTL=(time_t)cfg->serve_expired_reply_ttl;} 661 else S_NUMBER_OR_ZERO("serve-expired-client-timeout:", serve_expired_client_timeout) 662 else S_YNO("serve-original-ttl:", serve_original_ttl) 663 else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations) 664 else S_YNO("zonemd-permissive-mode:", zonemd_permissive_mode) 665 else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown) 666 else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown) 667 else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing) 668 else if(strcmp(opt, "permit-small-holddown:") == 0) 669 { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0); 670 autr_permit_small_holddown = cfg->permit_small_holddown; } 671 else S_MEMSIZE("key-cache-size:", key_cache_size) 672 else S_POW2("key-cache-slabs:", key_cache_slabs) 673 else S_MEMSIZE("neg-cache-size:", neg_cache_size) 674 else S_YNO("minimal-responses:", minimal_responses) 675 else S_YNO("rrset-roundrobin:", rrset_roundrobin) 676 else S_NUMBER_OR_ZERO("unknown-server-time-limit:", unknown_server_time_limit) 677 else S_STRLIST("local-data:", local_data) 678 else S_YNO("unblock-lan-zones:", unblock_lan_zones) 679 else S_YNO("insecure-lan-zones:", insecure_lan_zones) 680 else S_YNO("control-enable:", remote_control_enable) 681 else S_STRLIST_APPEND("control-interface:", control_ifs) 682 else S_NUMBER_NONZERO("control-port:", control_port) 683 else S_STR("server-key-file:", server_key_file) 684 else S_STR("server-cert-file:", server_cert_file) 685 else S_STR("control-key-file:", control_key_file) 686 else S_STR("control-cert-file:", control_cert_file) 687 else S_STR("module-config:", module_conf) 688 else S_STRLIST("python-script:", python_script) 689 else S_STRLIST("dynlib-file:", dynlib_file) 690 else S_YNO("disable-dnssec-lame-check:", disable_dnssec_lame_check) 691 #ifdef CLIENT_SUBNET 692 /* Can't set max subnet prefix here, since that value is used when 693 * generating the address tree. */ 694 /* No client-subnet-always-forward here, module registration depends on 695 * this option. */ 696 #endif 697 #ifdef USE_DNSTAP 698 else S_YNO("dnstap-enable:", dnstap) 699 else S_YNO("dnstap-bidirectional:", dnstap_bidirectional) 700 else S_STR("dnstap-socket-path:", dnstap_socket_path) 701 else S_STR("dnstap-ip:", dnstap_ip) 702 else S_YNO("dnstap-tls:", dnstap_tls) 703 else S_STR("dnstap-tls-server-name:", dnstap_tls_server_name) 704 else S_STR("dnstap-tls-cert-bundle:", dnstap_tls_cert_bundle) 705 else S_STR("dnstap-tls-client-key-file:", dnstap_tls_client_key_file) 706 else S_STR("dnstap-tls-client-cert-file:", 707 dnstap_tls_client_cert_file) 708 else S_YNO("dnstap-send-identity:", dnstap_send_identity) 709 else S_YNO("dnstap-send-version:", dnstap_send_version) 710 else S_STR("dnstap-identity:", dnstap_identity) 711 else S_STR("dnstap-version:", dnstap_version) 712 else S_YNO("dnstap-log-resolver-query-messages:", 713 dnstap_log_resolver_query_messages) 714 else S_YNO("dnstap-log-resolver-response-messages:", 715 dnstap_log_resolver_response_messages) 716 else S_YNO("dnstap-log-client-query-messages:", 717 dnstap_log_client_query_messages) 718 else S_YNO("dnstap-log-client-response-messages:", 719 dnstap_log_client_response_messages) 720 else S_YNO("dnstap-log-forwarder-query-messages:", 721 dnstap_log_forwarder_query_messages) 722 else S_YNO("dnstap-log-forwarder-response-messages:", 723 dnstap_log_forwarder_response_messages) 724 #endif 725 #ifdef USE_DNSCRYPT 726 else S_YNO("dnscrypt-enable:", dnscrypt) 727 else S_NUMBER_NONZERO("dnscrypt-port:", dnscrypt_port) 728 else S_STR("dnscrypt-provider:", dnscrypt_provider) 729 else S_STRLIST_UNIQ("dnscrypt-provider-cert:", dnscrypt_provider_cert) 730 else S_STRLIST("dnscrypt-provider-cert-rotated:", dnscrypt_provider_cert_rotated) 731 else S_STRLIST_UNIQ("dnscrypt-secret-key:", dnscrypt_secret_key) 732 else S_MEMSIZE("dnscrypt-shared-secret-cache-size:", 733 dnscrypt_shared_secret_cache_size) 734 else S_POW2("dnscrypt-shared-secret-cache-slabs:", 735 dnscrypt_shared_secret_cache_slabs) 736 else S_MEMSIZE("dnscrypt-nonce-cache-size:", 737 dnscrypt_nonce_cache_size) 738 else S_POW2("dnscrypt-nonce-cache-slabs:", 739 dnscrypt_nonce_cache_slabs) 740 #endif 741 else if(strcmp(opt, "ip-ratelimit:") == 0) { 742 IS_NUMBER_OR_ZERO; cfg->ip_ratelimit = atoi(val); 743 infra_ip_ratelimit=cfg->ip_ratelimit; 744 } 745 else if(strcmp(opt, "ratelimit:") == 0) { 746 IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val); 747 infra_dp_ratelimit=cfg->ratelimit; 748 } 749 else S_MEMSIZE("ip-ratelimit-size:", ip_ratelimit_size) 750 else S_MEMSIZE("ratelimit-size:", ratelimit_size) 751 else S_POW2("ip-ratelimit-slabs:", ip_ratelimit_slabs) 752 else S_POW2("ratelimit-slabs:", ratelimit_slabs) 753 else S_NUMBER_OR_ZERO("ip-ratelimit-factor:", ip_ratelimit_factor) 754 else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor) 755 else S_SIZET_NONZERO("fast-server-num:", fast_server_num) 756 else S_NUMBER_OR_ZERO("fast-server-permil:", fast_server_permil) 757 else S_YNO("qname-minimisation:", qname_minimisation) 758 else S_YNO("qname-minimisation-strict:", qname_minimisation_strict) 759 else S_YNO("pad-responses:", pad_responses) 760 else S_SIZET_NONZERO("pad-responses-block-size:", pad_responses_block_size) 761 else S_YNO("pad-queries:", pad_queries) 762 else S_SIZET_NONZERO("pad-queries-block-size:", pad_queries_block_size) 763 #ifdef USE_IPSECMOD 764 else S_YNO("ipsecmod-enabled:", ipsecmod_enabled) 765 else S_YNO("ipsecmod-ignore-bogus:", ipsecmod_ignore_bogus) 766 else if(strcmp(opt, "ipsecmod-max-ttl:") == 0) 767 { IS_NUMBER_OR_ZERO; cfg->ipsecmod_max_ttl = atoi(val); } 768 else S_YNO("ipsecmod-strict:", ipsecmod_strict) 769 #endif 770 else if(strcmp(opt, "define-tag:") ==0) { 771 return config_add_tag(cfg, val); 772 /* val_sig_skew_min, max and val_max_restart are copied into val_env 773 * during init so this does not update val_env with set_option */ 774 } else if(strcmp(opt, "val-sig-skew-min:") == 0) 775 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); } 776 else if(strcmp(opt, "val-sig-skew-max:") == 0) 777 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); } 778 else if(strcmp(opt, "val-max-restart:") == 0) 779 { IS_NUMBER_OR_ZERO; cfg->val_max_restart = (int32_t)atoi(val); } 780 else if (strcmp(opt, "outgoing-interface:") == 0) { 781 char* d = strdup(val); 782 char** oi = 783 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*)); 784 if(!d || !oi) { free(d); free(oi); return -1; } 785 if(cfg->out_ifs && cfg->num_out_ifs) { 786 memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*)); 787 free(cfg->out_ifs); 788 } 789 oi[cfg->num_out_ifs++] = d; 790 cfg->out_ifs = oi; 791 } else { 792 /* unknown or unsupported (from the set_option interface): 793 * interface, outgoing-interface, access-control, 794 * stub-zone, name, stub-addr, stub-host, stub-prime 795 * forward-first, stub-first, forward-ssl-upstream, 796 * stub-ssl-upstream, forward-zone, auth-zone 797 * name, forward-addr, forward-host, 798 * ratelimit-for-domain, ratelimit-below-domain, 799 * local-zone-tag, access-control-view, 800 * send-client-subnet, client-subnet-always-forward, 801 * max-client-subnet-ipv4, max-client-subnet-ipv6, 802 * min-client-subnet-ipv4, min-client-subnet-ipv6, 803 * max-ecs-tree-size-ipv4, max-ecs-tree-size-ipv6, ipsecmod_hook, 804 * ipsecmod_whitelist. */ 805 return 0; 806 } 807 return 1; 808 } 809 810 void config_print_func(char* line, void* arg) 811 { 812 FILE* f = (FILE*)arg; 813 (void)fprintf(f, "%s\n", line); 814 } 815 816 /** collate func arg */ 817 struct config_collate_arg { 818 /** list of result items */ 819 struct config_strlist_head list; 820 /** if a malloc error occurred, 0 is OK */ 821 int status; 822 }; 823 824 void config_collate_func(char* line, void* arg) 825 { 826 struct config_collate_arg* m = (struct config_collate_arg*)arg; 827 if(m->status) 828 return; 829 if(!cfg_strlist_append(&m->list, strdup(line))) 830 m->status = 1; 831 } 832 833 int config_get_option_list(struct config_file* cfg, const char* opt, 834 struct config_strlist** list) 835 { 836 struct config_collate_arg m; 837 memset(&m, 0, sizeof(m)); 838 *list = NULL; 839 if(!config_get_option(cfg, opt, config_collate_func, &m)) 840 return 1; 841 if(m.status) { 842 config_delstrlist(m.list.first); 843 return 2; 844 } 845 *list = m.list.first; 846 return 0; 847 } 848 849 int 850 config_get_option_collate(struct config_file* cfg, const char* opt, char** str) 851 { 852 struct config_strlist* list = NULL; 853 int r; 854 *str = NULL; 855 if((r = config_get_option_list(cfg, opt, &list)) != 0) 856 return r; 857 *str = config_collate_cat(list); 858 config_delstrlist(list); 859 if(!*str) return 2; 860 return 0; 861 } 862 863 char* 864 config_collate_cat(struct config_strlist* list) 865 { 866 size_t total = 0, left; 867 struct config_strlist* s; 868 char *r, *w; 869 if(!list) /* no elements */ 870 return strdup(""); 871 if(list->next == NULL) /* one element , no newline at end. */ 872 return strdup(list->str); 873 /* count total length */ 874 for(s=list; s; s=s->next) 875 total += strlen(s->str) + 1; /* len + newline */ 876 left = total+1; /* one extra for nul at end */ 877 r = malloc(left); 878 if(!r) 879 return NULL; 880 w = r; 881 for(s=list; s; s=s->next) { 882 size_t this = strlen(s->str); 883 if(this+2 > left) { /* sanity check */ 884 free(r); 885 return NULL; 886 } 887 snprintf(w, left, "%s\n", s->str); 888 this = strlen(w); 889 w += this; 890 left -= this; 891 } 892 return r; 893 } 894 895 /** compare and print decimal option */ 896 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \ 897 {snprintf(buf, len, "%d", (int)cfg->var); \ 898 func(buf, arg);} 899 /** compare and print unsigned option */ 900 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \ 901 {snprintf(buf, len, "%u", (unsigned)cfg->var); \ 902 func(buf, arg);} 903 /** compare and print yesno option */ 904 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \ 905 {func(cfg->var?"yes":"no", arg);} 906 /** compare and print string option */ 907 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \ 908 {func(cfg->var?cfg->var:"", arg);} 909 /** compare and print array option */ 910 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \ 911 {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);} 912 /** compare and print memorysize option */ 913 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \ 914 if(cfg->var > 1024*1024*1024) { \ 915 size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \ 916 snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \ 917 } else snprintf(buf, len, "%u", (unsigned)cfg->var); \ 918 func(buf, arg);} 919 /** compare and print list option */ 920 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \ 921 struct config_strlist* p = cfg->lst; \ 922 for(p = cfg->lst; p; p = p->next) \ 923 func(p->str, arg); \ 924 } 925 /** compare and print list option */ 926 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \ 927 struct config_str2list* p = cfg->lst; \ 928 for(p = cfg->lst; p; p = p->next) { \ 929 snprintf(buf, len, "%s %s", p->str, p->str2); \ 930 func(buf, arg); \ 931 } \ 932 } 933 /** compare and print list option */ 934 #define O_LS3(opt, name, lst) if(strcmp(opt, name)==0) { \ 935 struct config_str3list* p = cfg->lst; \ 936 for(p = cfg->lst; p; p = p->next) { \ 937 snprintf(buf, len, "%s %s %s", p->str, p->str2, p->str3); \ 938 func(buf, arg); \ 939 } \ 940 } 941 /** compare and print taglist option */ 942 #define O_LTG(opt, name, lst) if(strcmp(opt, name)==0) { \ 943 char* tmpstr = NULL; \ 944 struct config_strbytelist *p = cfg->lst; \ 945 for(p = cfg->lst; p; p = p->next) {\ 946 tmpstr = config_taglist2str(cfg, p->str2, p->str2len); \ 947 if(tmpstr) {\ 948 snprintf(buf, len, "%s %s", p->str, tmpstr); \ 949 func(buf, arg); \ 950 free(tmpstr); \ 951 } \ 952 } \ 953 } 954 955 int 956 config_get_option(struct config_file* cfg, const char* opt, 957 void (*func)(char*,void*), void* arg) 958 { 959 char buf[1024], nopt[64]; 960 size_t len = sizeof(buf); 961 if(!opt) return 0; 962 if(opt && opt[strlen(opt)-1] == ':' && strlen(opt)<sizeof(nopt)) { 963 memmove(nopt, opt, strlen(opt)); 964 nopt[strlen(opt)-1] = 0; 965 opt = nopt; 966 } 967 fptr_ok(fptr_whitelist_print_func(func)); 968 O_DEC(opt, "verbosity", verbosity) 969 else O_DEC(opt, "statistics-interval", stat_interval) 970 else O_YNO(opt, "statistics-cumulative", stat_cumulative) 971 else O_YNO(opt, "extended-statistics", stat_extended) 972 else O_YNO(opt, "shm-enable", shm_enable) 973 else O_DEC(opt, "shm-key", shm_key) 974 else O_YNO(opt, "use-syslog", use_syslog) 975 else O_STR(opt, "log-identity", log_identity) 976 else O_YNO(opt, "log-time-ascii", log_time_ascii) 977 else O_DEC(opt, "num-threads", num_threads) 978 else O_IFC(opt, "interface", num_ifs, ifs) 979 else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs) 980 else O_YNO(opt, "interface-automatic", if_automatic) 981 else O_DEC(opt, "port", port) 982 else O_DEC(opt, "outgoing-range", outgoing_num_ports) 983 else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp) 984 else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp) 985 else O_MEM(opt, "stream-wait-size", stream_wait_size) 986 else O_DEC(opt, "edns-buffer-size", edns_buffer_size) 987 else O_DEC(opt, "msg-buffer-size", msg_buffer_size) 988 else O_MEM(opt, "msg-cache-size", msg_cache_size) 989 else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs) 990 else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread) 991 else O_UNS(opt, "jostle-timeout", jostle_time) 992 else O_MEM(opt, "so-rcvbuf", so_rcvbuf) 993 else O_MEM(opt, "so-sndbuf", so_sndbuf) 994 else O_YNO(opt, "so-reuseport", so_reuseport) 995 else O_YNO(opt, "ip-transparent", ip_transparent) 996 else O_YNO(opt, "ip-freebind", ip_freebind) 997 else O_DEC(opt, "ip-dscp", ip_dscp) 998 else O_MEM(opt, "rrset-cache-size", rrset_cache_size) 999 else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs) 1000 else O_YNO(opt, "prefetch-key", prefetch_key) 1001 else O_YNO(opt, "prefetch", prefetch) 1002 else O_YNO(opt, "deny-any", deny_any) 1003 else O_DEC(opt, "cache-max-ttl", max_ttl) 1004 else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl) 1005 else O_DEC(opt, "cache-min-ttl", min_ttl) 1006 else O_DEC(opt, "infra-host-ttl", host_ttl) 1007 else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs) 1008 else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt) 1009 else O_YNO(opt, "infra-keep-probing", infra_keep_probing) 1010 else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts) 1011 else O_UNS(opt, "delay-close", delay_close) 1012 else O_YNO(opt, "udp-connect", udp_connect) 1013 else O_YNO(opt, "do-ip4", do_ip4) 1014 else O_YNO(opt, "do-ip6", do_ip6) 1015 else O_YNO(opt, "do-udp", do_udp) 1016 else O_YNO(opt, "do-tcp", do_tcp) 1017 else O_YNO(opt, "prefer-ip4", prefer_ip4) 1018 else O_YNO(opt, "prefer-ip6", prefer_ip6) 1019 else O_YNO(opt, "tcp-upstream", tcp_upstream) 1020 else O_YNO(opt, "udp-upstream-without-downstream", udp_upstream_without_downstream) 1021 else O_DEC(opt, "tcp-mss", tcp_mss) 1022 else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss) 1023 else O_DEC(opt, "tcp-auth-query-timeout", tcp_auth_query_timeout) 1024 else O_DEC(opt, "tcp-idle-timeout", tcp_idle_timeout) 1025 else O_DEC(opt, "max-reuse-tcp-queries", max_reuse_tcp_queries) 1026 else O_DEC(opt, "tcp-reuse-timeout", tcp_reuse_timeout) 1027 else O_YNO(opt, "edns-tcp-keepalive", do_tcp_keepalive) 1028 else O_DEC(opt, "edns-tcp-keepalive-timeout", tcp_keepalive_timeout) 1029 else O_YNO(opt, "ssl-upstream", ssl_upstream) 1030 else O_STR(opt, "ssl-service-key", ssl_service_key) 1031 else O_STR(opt, "ssl-service-pem", ssl_service_pem) 1032 else O_DEC(opt, "ssl-port", ssl_port) 1033 else O_STR(opt, "tls-cert-bundle", tls_cert_bundle) 1034 else O_YNO(opt, "tls-win-cert", tls_win_cert) 1035 else O_LST(opt, "tls-additional-port", tls_additional_port) 1036 else O_LST(opt, "tls-session-ticket-keys", tls_session_ticket_keys.first) 1037 else O_STR(opt, "tls-ciphers", tls_ciphers) 1038 else O_STR(opt, "tls-ciphersuites", tls_ciphersuites) 1039 else O_YNO(opt, "tls-use-sni", tls_use_sni) 1040 else O_DEC(opt, "https-port", https_port) 1041 else O_STR(opt, "http-endpoint", http_endpoint) 1042 else O_UNS(opt, "http-max-streams", http_max_streams) 1043 else O_MEM(opt, "http-query-buffer-size", http_query_buffer_size) 1044 else O_MEM(opt, "http-response-buffer-size", http_response_buffer_size) 1045 else O_YNO(opt, "http-nodelay", http_nodelay) 1046 else O_YNO(opt, "http-notls-downstream", http_notls_downstream) 1047 else O_YNO(opt, "use-systemd", use_systemd) 1048 else O_YNO(opt, "do-daemonize", do_daemonize) 1049 else O_STR(opt, "chroot", chrootdir) 1050 else O_STR(opt, "username", username) 1051 else O_STR(opt, "directory", directory) 1052 else O_STR(opt, "logfile", logfile) 1053 else O_YNO(opt, "log-queries", log_queries) 1054 else O_YNO(opt, "log-replies", log_replies) 1055 else O_YNO(opt, "log-tag-queryreply", log_tag_queryreply) 1056 else O_YNO(opt, "log-local-actions", log_local_actions) 1057 else O_YNO(opt, "log-servfail", log_servfail) 1058 else O_STR(opt, "pidfile", pidfile) 1059 else O_YNO(opt, "hide-identity", hide_identity) 1060 else O_YNO(opt, "hide-version", hide_version) 1061 else O_YNO(opt, "hide-trustanchor", hide_trustanchor) 1062 else O_YNO(opt, "hide-http-user-agent", hide_http_user_agent) 1063 else O_STR(opt, "identity", identity) 1064 else O_STR(opt, "version", version) 1065 else O_STR(opt, "http-user-agent", http_user_agent) 1066 else O_STR(opt, "nsid", nsid_cfg_str) 1067 else O_STR(opt, "target-fetch-policy", target_fetch_policy) 1068 else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize) 1069 else O_YNO(opt, "harden-large-queries", harden_large_queries) 1070 else O_YNO(opt, "harden-glue", harden_glue) 1071 else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped) 1072 else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain) 1073 else O_YNO(opt, "harden-referral-path", harden_referral_path) 1074 else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade) 1075 else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id) 1076 else O_LST(opt, "caps-whitelist", caps_whitelist) 1077 else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold) 1078 else O_YNO(opt, "do-not-query-localhost", donotquery_localhost) 1079 else O_STR(opt, "module-config", module_conf) 1080 else O_DEC(opt, "val-bogus-ttl", bogus_ttl) 1081 else O_YNO(opt, "val-clean-additional", val_clean_additional) 1082 else O_DEC(opt, "val-log-level", val_log_level) 1083 else O_YNO(opt, "val-permissive-mode", val_permissive_mode) 1084 else O_YNO(opt, "aggressive-nsec", aggressive_nsec) 1085 else O_YNO(opt, "ignore-cd-flag", ignore_cd) 1086 else O_YNO(opt, "serve-expired", serve_expired) 1087 else O_DEC(opt, "serve-expired-ttl", serve_expired_ttl) 1088 else O_YNO(opt, "serve-expired-ttl-reset", serve_expired_ttl_reset) 1089 else O_DEC(opt, "serve-expired-reply-ttl", serve_expired_reply_ttl) 1090 else O_DEC(opt, "serve-expired-client-timeout", serve_expired_client_timeout) 1091 else O_YNO(opt, "serve-original-ttl", serve_original_ttl) 1092 else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations) 1093 else O_YNO(opt, "zonemd-permissive-mode", zonemd_permissive_mode) 1094 else O_UNS(opt, "add-holddown", add_holddown) 1095 else O_UNS(opt, "del-holddown", del_holddown) 1096 else O_UNS(opt, "keep-missing", keep_missing) 1097 else O_YNO(opt, "permit-small-holddown", permit_small_holddown) 1098 else O_MEM(opt, "key-cache-size", key_cache_size) 1099 else O_DEC(opt, "key-cache-slabs", key_cache_slabs) 1100 else O_MEM(opt, "neg-cache-size", neg_cache_size) 1101 else O_YNO(opt, "control-enable", remote_control_enable) 1102 else O_DEC(opt, "control-port", control_port) 1103 else O_STR(opt, "server-key-file", server_key_file) 1104 else O_STR(opt, "server-cert-file", server_cert_file) 1105 else O_STR(opt, "control-key-file", control_key_file) 1106 else O_STR(opt, "control-cert-file", control_cert_file) 1107 else O_LST(opt, "root-hints", root_hints) 1108 else O_LS2(opt, "access-control", acls) 1109 else O_LS2(opt, "tcp-connection-limit", tcp_connection_limits) 1110 else O_LST(opt, "do-not-query-address", donotqueryaddrs) 1111 else O_LST(opt, "private-address", private_address) 1112 else O_LST(opt, "private-domain", private_domain) 1113 else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list) 1114 else O_LST(opt, "trust-anchor-file", trust_anchor_file_list) 1115 else O_LST(opt, "trust-anchor", trust_anchor_list) 1116 else O_LST(opt, "trusted-keys-file", trusted_keys_file_list) 1117 else O_YNO(opt, "trust-anchor-signaling", trust_anchor_signaling) 1118 else O_YNO(opt, "root-key-sentinel", root_key_sentinel) 1119 else O_LST(opt, "control-interface", control_ifs.first) 1120 else O_LST(opt, "domain-insecure", domain_insecure) 1121 else O_UNS(opt, "val-override-date", val_date_override) 1122 else O_YNO(opt, "minimal-responses", minimal_responses) 1123 else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin) 1124 else O_DEC(opt, "unknown-server-time-limit", unknown_server_time_limit) 1125 #ifdef CLIENT_SUBNET 1126 else O_LST(opt, "send-client-subnet", client_subnet) 1127 else O_LST(opt, "client-subnet-zone", client_subnet_zone) 1128 else O_DEC(opt, "max-client-subnet-ipv4", max_client_subnet_ipv4) 1129 else O_DEC(opt, "max-client-subnet-ipv6", max_client_subnet_ipv6) 1130 else O_DEC(opt, "min-client-subnet-ipv4", min_client_subnet_ipv4) 1131 else O_DEC(opt, "min-client-subnet-ipv6", min_client_subnet_ipv6) 1132 else O_DEC(opt, "max-ecs-tree-size-ipv4", max_ecs_tree_size_ipv4) 1133 else O_DEC(opt, "max-ecs-tree-size-ipv6", max_ecs_tree_size_ipv6) 1134 else O_YNO(opt, "client-subnet-always-forward:", 1135 client_subnet_always_forward) 1136 #endif 1137 #ifdef USE_DNSTAP 1138 else O_YNO(opt, "dnstap-enable", dnstap) 1139 else O_YNO(opt, "dnstap-bidirectional", dnstap_bidirectional) 1140 else O_STR(opt, "dnstap-socket-path", dnstap_socket_path) 1141 else O_STR(opt, "dnstap-ip", dnstap_ip) 1142 else O_YNO(opt, "dnstap-tls", dnstap_tls) 1143 else O_STR(opt, "dnstap-tls-server-name", dnstap_tls_server_name) 1144 else O_STR(opt, "dnstap-tls-cert-bundle", dnstap_tls_cert_bundle) 1145 else O_STR(opt, "dnstap-tls-client-key-file", 1146 dnstap_tls_client_key_file) 1147 else O_STR(opt, "dnstap-tls-client-cert-file", 1148 dnstap_tls_client_cert_file) 1149 else O_YNO(opt, "dnstap-send-identity", dnstap_send_identity) 1150 else O_YNO(opt, "dnstap-send-version", dnstap_send_version) 1151 else O_STR(opt, "dnstap-identity", dnstap_identity) 1152 else O_STR(opt, "dnstap-version", dnstap_version) 1153 else O_YNO(opt, "dnstap-log-resolver-query-messages", 1154 dnstap_log_resolver_query_messages) 1155 else O_YNO(opt, "dnstap-log-resolver-response-messages", 1156 dnstap_log_resolver_response_messages) 1157 else O_YNO(opt, "dnstap-log-client-query-messages", 1158 dnstap_log_client_query_messages) 1159 else O_YNO(opt, "dnstap-log-client-response-messages", 1160 dnstap_log_client_response_messages) 1161 else O_YNO(opt, "dnstap-log-forwarder-query-messages", 1162 dnstap_log_forwarder_query_messages) 1163 else O_YNO(opt, "dnstap-log-forwarder-response-messages", 1164 dnstap_log_forwarder_response_messages) 1165 #endif 1166 #ifdef USE_DNSCRYPT 1167 else O_YNO(opt, "dnscrypt-enable", dnscrypt) 1168 else O_DEC(opt, "dnscrypt-port", dnscrypt_port) 1169 else O_STR(opt, "dnscrypt-provider", dnscrypt_provider) 1170 else O_LST(opt, "dnscrypt-provider-cert", dnscrypt_provider_cert) 1171 else O_LST(opt, "dnscrypt-provider-cert-rotated", dnscrypt_provider_cert_rotated) 1172 else O_LST(opt, "dnscrypt-secret-key", dnscrypt_secret_key) 1173 else O_MEM(opt, "dnscrypt-shared-secret-cache-size", 1174 dnscrypt_shared_secret_cache_size) 1175 else O_DEC(opt, "dnscrypt-shared-secret-cache-slabs", 1176 dnscrypt_shared_secret_cache_slabs) 1177 else O_MEM(opt, "dnscrypt-nonce-cache-size", 1178 dnscrypt_nonce_cache_size) 1179 else O_DEC(opt, "dnscrypt-nonce-cache-slabs", 1180 dnscrypt_nonce_cache_slabs) 1181 #endif 1182 else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones) 1183 else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones) 1184 else O_DEC(opt, "max-udp-size", max_udp_size) 1185 else O_LST(opt, "python-script", python_script) 1186 else O_LST(opt, "dynlib-file", dynlib_file) 1187 else O_YNO(opt, "disable-dnssec-lame-check", disable_dnssec_lame_check) 1188 else O_DEC(opt, "ip-ratelimit", ip_ratelimit) 1189 else O_DEC(opt, "ratelimit", ratelimit) 1190 else O_MEM(opt, "ip-ratelimit-size", ip_ratelimit_size) 1191 else O_MEM(opt, "ratelimit-size", ratelimit_size) 1192 else O_DEC(opt, "ip-ratelimit-slabs", ip_ratelimit_slabs) 1193 else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs) 1194 else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain) 1195 else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain) 1196 else O_DEC(opt, "ip-ratelimit-factor", ip_ratelimit_factor) 1197 else O_DEC(opt, "ratelimit-factor", ratelimit_factor) 1198 else O_DEC(opt, "fast-server-num", fast_server_num) 1199 else O_DEC(opt, "fast-server-permil", fast_server_permil) 1200 else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min) 1201 else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max) 1202 else O_DEC(opt, "val-max-restart", val_max_restart) 1203 else O_YNO(opt, "qname-minimisation", qname_minimisation) 1204 else O_YNO(opt, "qname-minimisation-strict", qname_minimisation_strict) 1205 else O_IFC(opt, "define-tag", num_tags, tagname) 1206 else O_LTG(opt, "local-zone-tag", local_zone_tags) 1207 else O_LTG(opt, "access-control-tag", acl_tags) 1208 else O_LTG(opt, "response-ip-tag", respip_tags) 1209 else O_LS3(opt, "local-zone-override", local_zone_overrides) 1210 else O_LS3(opt, "access-control-tag-action", acl_tag_actions) 1211 else O_LS3(opt, "access-control-tag-data", acl_tag_datas) 1212 else O_LS2(opt, "access-control-view", acl_view) 1213 else O_YNO(opt, "pad-responses", pad_responses) 1214 else O_DEC(opt, "pad-responses-block-size", pad_responses_block_size) 1215 else O_YNO(opt, "pad-queries", pad_queries) 1216 else O_DEC(opt, "pad-queries-block-size", pad_queries_block_size) 1217 else O_LS2(opt, "edns-client-strings", edns_client_strings) 1218 #ifdef USE_IPSECMOD 1219 else O_YNO(opt, "ipsecmod-enabled", ipsecmod_enabled) 1220 else O_YNO(opt, "ipsecmod-ignore-bogus", ipsecmod_ignore_bogus) 1221 else O_STR(opt, "ipsecmod-hook", ipsecmod_hook) 1222 else O_DEC(opt, "ipsecmod-max-ttl", ipsecmod_max_ttl) 1223 else O_LST(opt, "ipsecmod-whitelist", ipsecmod_whitelist) 1224 else O_YNO(opt, "ipsecmod-strict", ipsecmod_strict) 1225 #endif 1226 #ifdef USE_CACHEDB 1227 else O_STR(opt, "backend", cachedb_backend) 1228 else O_STR(opt, "secret-seed", cachedb_secret) 1229 #ifdef USE_REDIS 1230 else O_STR(opt, "redis-server-host", redis_server_host) 1231 else O_DEC(opt, "redis-server-port", redis_server_port) 1232 else O_DEC(opt, "redis-timeout", redis_timeout) 1233 else O_YNO(opt, "redis-expire-records", redis_expire_records) 1234 #endif /* USE_REDIS */ 1235 #endif /* USE_CACHEDB */ 1236 #ifdef USE_IPSET 1237 else O_STR(opt, "name-v4", ipset_name_v4) 1238 else O_STR(opt, "name-v6", ipset_name_v6) 1239 #endif 1240 /* not here: 1241 * outgoing-permit, outgoing-avoid - have list of ports 1242 * local-zone - zones and nodefault variables 1243 * local-data - see below 1244 * local-data-ptr - converted to local-data entries 1245 * stub-zone, name, stub-addr, stub-host, stub-prime 1246 * forward-zone, name, forward-addr, forward-host 1247 */ 1248 else return 0; 1249 return 1; 1250 } 1251 1252 /** initialize the global cfg_parser object */ 1253 static void 1254 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot) 1255 { 1256 static struct config_parser_state st; 1257 cfg_parser = &st; 1258 cfg_parser->filename = filename; 1259 cfg_parser->line = 1; 1260 cfg_parser->errors = 0; 1261 cfg_parser->cfg = cfg; 1262 cfg_parser->chroot = chroot; 1263 init_cfg_parse(); 1264 } 1265 1266 int 1267 config_read(struct config_file* cfg, const char* filename, const char* chroot) 1268 { 1269 FILE *in; 1270 char *fname = (char*)filename; 1271 #ifdef HAVE_GLOB 1272 glob_t g; 1273 size_t i; 1274 int r, flags; 1275 #endif 1276 if(!fname) 1277 return 1; 1278 1279 /* check for wildcards */ 1280 #ifdef HAVE_GLOB 1281 if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') && 1282 !strchr(fname, '{') && !strchr(fname, '~'))) { 1283 verbose(VERB_QUERY, "wildcard found, processing %s", fname); 1284 flags = 0 1285 #ifdef GLOB_ERR 1286 | GLOB_ERR 1287 #endif 1288 #ifdef GLOB_NOSORT 1289 | GLOB_NOSORT 1290 #endif 1291 #ifdef GLOB_BRACE 1292 | GLOB_BRACE 1293 #endif 1294 #ifdef GLOB_TILDE 1295 | GLOB_TILDE 1296 #endif 1297 ; 1298 memset(&g, 0, sizeof(g)); 1299 r = glob(fname, flags, NULL, &g); 1300 if(r) { 1301 /* some error */ 1302 globfree(&g); 1303 if(r == GLOB_NOMATCH) { 1304 verbose(VERB_QUERY, "include: " 1305 "no matches for %s", fname); 1306 return 1; 1307 } else if(r == GLOB_NOSPACE) { 1308 log_err("include: %s: " 1309 "fnametern out of memory", fname); 1310 } else if(r == GLOB_ABORTED) { 1311 log_err("wildcard include: %s: expansion " 1312 "aborted (%s)", fname, strerror(errno)); 1313 } else { 1314 log_err("wildcard include: %s: expansion " 1315 "failed (%s)", fname, strerror(errno)); 1316 } 1317 /* ignore globs that yield no files */ 1318 return 1; 1319 } 1320 /* process files found, if any */ 1321 for(i=0; i<(size_t)g.gl_pathc; i++) { 1322 if(!config_read(cfg, g.gl_pathv[i], chroot)) { 1323 log_err("error reading wildcard " 1324 "include: %s", g.gl_pathv[i]); 1325 globfree(&g); 1326 return 0; 1327 } 1328 } 1329 globfree(&g); 1330 return 1; 1331 } 1332 #endif /* HAVE_GLOB */ 1333 1334 in = fopen(fname, "r"); 1335 if(!in) { 1336 log_err("Could not open %s: %s", fname, strerror(errno)); 1337 return 0; 1338 } 1339 create_cfg_parser(cfg, fname, chroot); 1340 ub_c_in = in; 1341 ub_c_parse(); 1342 fclose(in); 1343 1344 if(!cfg->dnscrypt) cfg->dnscrypt_port = 0; 1345 1346 if(cfg_parser->errors != 0) { 1347 fprintf(stderr, "read %s failed: %d errors in configuration file\n", 1348 fname, cfg_parser->errors); 1349 errno=EINVAL; 1350 return 0; 1351 } 1352 1353 return 1; 1354 } 1355 1356 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm) 1357 { 1358 struct config_stub* p = *(*pp); 1359 while(p) { 1360 if(strcmp(p->name, nm) == 0) 1361 return p; 1362 (*pp) = &p->next; 1363 p = p->next; 1364 } 1365 return NULL; 1366 } 1367 1368 void 1369 config_delstrlist(struct config_strlist* p) 1370 { 1371 struct config_strlist *np; 1372 while(p) { 1373 np = p->next; 1374 free(p->str); 1375 free(p); 1376 p = np; 1377 } 1378 } 1379 1380 void 1381 config_deldblstrlist(struct config_str2list* p) 1382 { 1383 struct config_str2list *np; 1384 while(p) { 1385 np = p->next; 1386 free(p->str); 1387 free(p->str2); 1388 free(p); 1389 p = np; 1390 } 1391 } 1392 1393 void 1394 config_deltrplstrlist(struct config_str3list* p) 1395 { 1396 struct config_str3list *np; 1397 while(p) { 1398 np = p->next; 1399 free(p->str); 1400 free(p->str2); 1401 free(p->str3); 1402 free(p); 1403 p = np; 1404 } 1405 } 1406 1407 void 1408 config_delauth(struct config_auth* p) 1409 { 1410 if(!p) return; 1411 free(p->name); 1412 config_delstrlist(p->masters); 1413 config_delstrlist(p->urls); 1414 config_delstrlist(p->allow_notify); 1415 free(p->zonefile); 1416 free(p->rpz_taglist); 1417 free(p->rpz_action_override); 1418 free(p->rpz_cname); 1419 free(p->rpz_log_name); 1420 free(p); 1421 } 1422 1423 void 1424 config_delauths(struct config_auth* p) 1425 { 1426 struct config_auth* np; 1427 while(p) { 1428 np = p->next; 1429 config_delauth(p); 1430 p = np; 1431 } 1432 } 1433 1434 void 1435 config_delstub(struct config_stub* p) 1436 { 1437 if(!p) return; 1438 free(p->name); 1439 config_delstrlist(p->hosts); 1440 config_delstrlist(p->addrs); 1441 free(p); 1442 } 1443 1444 void 1445 config_delstubs(struct config_stub* p) 1446 { 1447 struct config_stub* np; 1448 while(p) { 1449 np = p->next; 1450 config_delstub(p); 1451 p = np; 1452 } 1453 } 1454 1455 void 1456 config_delview(struct config_view* p) 1457 { 1458 if(!p) return; 1459 free(p->name); 1460 config_deldblstrlist(p->local_zones); 1461 config_delstrlist(p->local_zones_nodefault); 1462 #ifdef USE_IPSET 1463 config_delstrlist(p->local_zones_ipset); 1464 #endif 1465 config_delstrlist(p->local_data); 1466 free(p); 1467 } 1468 1469 void 1470 config_delviews(struct config_view* p) 1471 { 1472 struct config_view* np; 1473 while(p) { 1474 np = p->next; 1475 config_delview(p); 1476 p = np; 1477 } 1478 } 1479 1480 void 1481 config_del_strarray(char** array, int num) 1482 { 1483 int i; 1484 if(!array) 1485 return; 1486 for(i=0; i<num; i++) { 1487 free(array[i]); 1488 } 1489 free(array); 1490 } 1491 1492 void 1493 config_del_strbytelist(struct config_strbytelist* p) 1494 { 1495 struct config_strbytelist* np; 1496 while(p) { 1497 np = p->next; 1498 free(p->str); 1499 free(p->str2); 1500 free(p); 1501 p = np; 1502 } 1503 } 1504 1505 void 1506 config_delete(struct config_file* cfg) 1507 { 1508 if(!cfg) return; 1509 free(cfg->username); 1510 free(cfg->chrootdir); 1511 free(cfg->directory); 1512 free(cfg->logfile); 1513 free(cfg->pidfile); 1514 free(cfg->target_fetch_policy); 1515 free(cfg->ssl_service_key); 1516 free(cfg->ssl_service_pem); 1517 free(cfg->tls_cert_bundle); 1518 config_delstrlist(cfg->tls_additional_port); 1519 config_delstrlist(cfg->tls_session_ticket_keys.first); 1520 free(cfg->tls_ciphers); 1521 free(cfg->tls_ciphersuites); 1522 free(cfg->http_endpoint); 1523 if(cfg->log_identity) { 1524 log_ident_revert_to_default(); 1525 free(cfg->log_identity); 1526 } 1527 config_del_strarray(cfg->ifs, cfg->num_ifs); 1528 config_del_strarray(cfg->out_ifs, cfg->num_out_ifs); 1529 config_delstubs(cfg->stubs); 1530 config_delstubs(cfg->forwards); 1531 config_delauths(cfg->auths); 1532 config_delviews(cfg->views); 1533 config_delstrlist(cfg->donotqueryaddrs); 1534 config_delstrlist(cfg->root_hints); 1535 #ifdef CLIENT_SUBNET 1536 config_delstrlist(cfg->client_subnet); 1537 config_delstrlist(cfg->client_subnet_zone); 1538 #endif 1539 free(cfg->identity); 1540 free(cfg->version); 1541 free(cfg->http_user_agent); 1542 free(cfg->nsid_cfg_str); 1543 free(cfg->nsid); 1544 free(cfg->module_conf); 1545 free(cfg->outgoing_avail_ports); 1546 config_delstrlist(cfg->caps_whitelist); 1547 config_delstrlist(cfg->private_address); 1548 config_delstrlist(cfg->private_domain); 1549 config_delstrlist(cfg->auto_trust_anchor_file_list); 1550 config_delstrlist(cfg->trust_anchor_file_list); 1551 config_delstrlist(cfg->trusted_keys_file_list); 1552 config_delstrlist(cfg->trust_anchor_list); 1553 config_delstrlist(cfg->domain_insecure); 1554 config_deldblstrlist(cfg->acls); 1555 config_deldblstrlist(cfg->tcp_connection_limits); 1556 free(cfg->val_nsec3_key_iterations); 1557 config_deldblstrlist(cfg->local_zones); 1558 config_delstrlist(cfg->local_zones_nodefault); 1559 #ifdef USE_IPSET 1560 config_delstrlist(cfg->local_zones_ipset); 1561 #endif 1562 config_delstrlist(cfg->local_data); 1563 config_deltrplstrlist(cfg->local_zone_overrides); 1564 config_del_strarray(cfg->tagname, cfg->num_tags); 1565 config_del_strbytelist(cfg->local_zone_tags); 1566 config_del_strbytelist(cfg->acl_tags); 1567 config_del_strbytelist(cfg->respip_tags); 1568 config_deltrplstrlist(cfg->acl_tag_actions); 1569 config_deltrplstrlist(cfg->acl_tag_datas); 1570 config_delstrlist(cfg->control_ifs.first); 1571 free(cfg->server_key_file); 1572 free(cfg->server_cert_file); 1573 free(cfg->control_key_file); 1574 free(cfg->control_cert_file); 1575 free(cfg->dns64_prefix); 1576 config_delstrlist(cfg->dns64_ignore_aaaa); 1577 free(cfg->dnstap_socket_path); 1578 free(cfg->dnstap_ip); 1579 free(cfg->dnstap_tls_server_name); 1580 free(cfg->dnstap_tls_cert_bundle); 1581 free(cfg->dnstap_tls_client_key_file); 1582 free(cfg->dnstap_tls_client_cert_file); 1583 free(cfg->dnstap_identity); 1584 free(cfg->dnstap_version); 1585 config_deldblstrlist(cfg->ratelimit_for_domain); 1586 config_deldblstrlist(cfg->ratelimit_below_domain); 1587 config_delstrlist(cfg->python_script); 1588 config_delstrlist(cfg->dynlib_file); 1589 config_deldblstrlist(cfg->edns_client_strings); 1590 #ifdef USE_IPSECMOD 1591 free(cfg->ipsecmod_hook); 1592 config_delstrlist(cfg->ipsecmod_whitelist); 1593 #endif 1594 #ifdef USE_CACHEDB 1595 free(cfg->cachedb_backend); 1596 free(cfg->cachedb_secret); 1597 #ifdef USE_REDIS 1598 free(cfg->redis_server_host); 1599 #endif /* USE_REDIS */ 1600 #endif /* USE_CACHEDB */ 1601 #ifdef USE_IPSET 1602 free(cfg->ipset_name_v4); 1603 free(cfg->ipset_name_v6); 1604 #endif 1605 free(cfg); 1606 } 1607 1608 static void 1609 init_outgoing_availports(int* a, int num) 1610 { 1611 /* generated with make iana_update */ 1612 const int iana_assigned[] = { 1613 #include "util/iana_ports.inc" 1614 -1 }; /* end marker to put behind trailing comma */ 1615 1616 int i; 1617 /* do not use <1024, that could be trouble with the system, privs */ 1618 for(i=1024; i<num; i++) { 1619 a[i] = i; 1620 } 1621 /* create empty spot at 49152 to keep ephemeral ports available 1622 * to other programs */ 1623 for(i=49152; i<49152+256; i++) 1624 a[i] = 0; 1625 /* pick out all the IANA assigned ports */ 1626 for(i=0; iana_assigned[i]!=-1; i++) { 1627 if(iana_assigned[i] < num) 1628 a[iana_assigned[i]] = 0; 1629 } 1630 } 1631 1632 int 1633 cfg_mark_ports(const char* str, int allow, int* avail, int num) 1634 { 1635 char* mid = strchr(str, '-'); 1636 #ifdef DISABLE_EXPLICIT_PORT_RANDOMISATION 1637 log_warn("Explicit port randomisation disabled, ignoring " 1638 "outgoing-port-permit and outgoing-port-avoid configuration " 1639 "options"); 1640 #endif 1641 if(!mid) { 1642 int port = atoi(str); 1643 if(port == 0 && strcmp(str, "0") != 0) { 1644 log_err("cannot parse port number '%s'", str); 1645 return 0; 1646 } 1647 if(port < num) 1648 avail[port] = (allow?port:0); 1649 } else { 1650 int i, low, high = atoi(mid+1); 1651 char buf[16]; 1652 if(high == 0 && strcmp(mid+1, "0") != 0) { 1653 log_err("cannot parse port number '%s'", mid+1); 1654 return 0; 1655 } 1656 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) { 1657 log_err("cannot parse port number '%s'", str); 1658 return 0; 1659 } 1660 if(mid > str) 1661 memcpy(buf, str, (size_t)(mid-str)); 1662 buf[mid-str] = 0; 1663 low = atoi(buf); 1664 if(low == 0 && strcmp(buf, "0") != 0) { 1665 log_err("cannot parse port number '%s'", buf); 1666 return 0; 1667 } 1668 for(i=low; i<=high; i++) { 1669 if(i < num) 1670 avail[i] = (allow?i:0); 1671 } 1672 return 1; 1673 } 1674 return 1; 1675 } 1676 1677 int 1678 cfg_scan_ports(int* avail, int num) 1679 { 1680 int i; 1681 int count = 0; 1682 for(i=0; i<num; i++) { 1683 if(avail[i]) 1684 count++; 1685 } 1686 return count; 1687 } 1688 1689 int cfg_condense_ports(struct config_file* cfg, int** avail) 1690 { 1691 int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536); 1692 int i, at = 0; 1693 *avail = NULL; 1694 if(num == 0) 1695 return 0; 1696 *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int)); 1697 if(!*avail) 1698 return 0; 1699 for(i=0; i<65536; i++) { 1700 if(cfg->outgoing_avail_ports[i]) 1701 (*avail)[at++] = cfg->outgoing_avail_ports[i]; 1702 } 1703 log_assert(at == num); 1704 return num; 1705 } 1706 1707 void cfg_apply_local_port_policy(struct config_file* cfg, int num) { 1708 (void)cfg; 1709 (void)num; 1710 #ifdef USE_LINUX_IP_LOCAL_PORT_RANGE 1711 { 1712 int i = 0; 1713 FILE* range_fd; 1714 if ((range_fd = fopen(LINUX_IP_LOCAL_PORT_RANGE_PATH, "r")) != NULL) { 1715 int min_port = 0; 1716 int max_port = num - 1; 1717 if (fscanf(range_fd, "%d %d", &min_port, &max_port) == 2) { 1718 for(i=0; i<min_port; i++) { 1719 cfg->outgoing_avail_ports[i] = 0; 1720 } 1721 for(i=max_port+1; i<num; i++) { 1722 cfg->outgoing_avail_ports[i] = 0; 1723 } 1724 } else { 1725 log_err("unexpected port range in %s", 1726 LINUX_IP_LOCAL_PORT_RANGE_PATH); 1727 } 1728 fclose(range_fd); 1729 } else { 1730 log_err("failed to read from file: %s (%s)", 1731 LINUX_IP_LOCAL_PORT_RANGE_PATH, 1732 strerror(errno)); 1733 } 1734 } 1735 #endif 1736 } 1737 1738 /** print error with file and line number */ 1739 static void ub_c_error_va_list(const char *fmt, va_list args) 1740 { 1741 cfg_parser->errors++; 1742 fprintf(stderr, "%s:%d: error: ", cfg_parser->filename, 1743 cfg_parser->line); 1744 vfprintf(stderr, fmt, args); 1745 fprintf(stderr, "\n"); 1746 } 1747 1748 /** print error with file and line number */ 1749 void ub_c_error_msg(const char* fmt, ...) 1750 { 1751 va_list args; 1752 va_start(args, fmt); 1753 ub_c_error_va_list(fmt, args); 1754 va_end(args); 1755 } 1756 1757 void ub_c_error(const char *str) 1758 { 1759 cfg_parser->errors++; 1760 fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename, 1761 cfg_parser->line, str); 1762 } 1763 1764 int ub_c_wrap(void) 1765 { 1766 return 1; 1767 } 1768 1769 int cfg_strlist_append(struct config_strlist_head* list, char* item) 1770 { 1771 struct config_strlist *s; 1772 if(!item || !list) { 1773 free(item); 1774 return 0; 1775 } 1776 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 1777 if(!s) { 1778 free(item); 1779 return 0; 1780 } 1781 s->str = item; 1782 s->next = NULL; 1783 if(list->last) 1784 list->last->next = s; 1785 else 1786 list->first = s; 1787 list->last = s; 1788 return 1; 1789 } 1790 1791 int 1792 cfg_region_strlist_insert(struct regional* region, 1793 struct config_strlist** head, char* item) 1794 { 1795 struct config_strlist *s; 1796 if(!item || !head) 1797 return 0; 1798 s = (struct config_strlist*)regional_alloc_zero(region, 1799 sizeof(struct config_strlist)); 1800 if(!s) 1801 return 0; 1802 s->str = item; 1803 s->next = *head; 1804 *head = s; 1805 return 1; 1806 } 1807 1808 struct config_strlist* 1809 cfg_strlist_find(struct config_strlist* head, const char *item) 1810 { 1811 struct config_strlist *s = head; 1812 if(!head){ 1813 return NULL; 1814 } 1815 while(s) { 1816 if(strcmp(s->str, item) == 0) { 1817 return s; 1818 } 1819 s = s->next; 1820 } 1821 return NULL; 1822 } 1823 1824 int 1825 cfg_strlist_insert(struct config_strlist** head, char* item) 1826 { 1827 struct config_strlist *s; 1828 if(!item || !head) { 1829 free(item); 1830 return 0; 1831 } 1832 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 1833 if(!s) { 1834 free(item); 1835 return 0; 1836 } 1837 s->str = item; 1838 s->next = *head; 1839 *head = s; 1840 return 1; 1841 } 1842 1843 int 1844 cfg_strlist_append_ex(struct config_strlist** head, char* item) 1845 { 1846 struct config_strlist *s; 1847 if(!item || !head) 1848 return 0; 1849 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 1850 if(!s) 1851 return 0; 1852 s->str = item; 1853 s->next = NULL; 1854 1855 if (*head==NULL) { 1856 *head = s; 1857 } else { 1858 struct config_strlist *last = *head; 1859 while (last->next!=NULL) { 1860 last = last->next; 1861 } 1862 last->next = s; 1863 } 1864 1865 return 1; 1866 } 1867 1868 int 1869 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2) 1870 { 1871 struct config_str2list *s; 1872 if(!item || !i2 || !head) { 1873 free(item); 1874 free(i2); 1875 return 0; 1876 } 1877 s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list)); 1878 if(!s) { 1879 free(item); 1880 free(i2); 1881 return 0; 1882 } 1883 s->str = item; 1884 s->str2 = i2; 1885 s->next = *head; 1886 *head = s; 1887 return 1; 1888 } 1889 1890 int 1891 cfg_str3list_insert(struct config_str3list** head, char* item, char* i2, 1892 char* i3) 1893 { 1894 struct config_str3list *s; 1895 if(!item || !i2 || !i3 || !head) 1896 return 0; 1897 s = (struct config_str3list*)calloc(1, sizeof(struct config_str3list)); 1898 if(!s) 1899 return 0; 1900 s->str = item; 1901 s->str2 = i2; 1902 s->str3 = i3; 1903 s->next = *head; 1904 *head = s; 1905 return 1; 1906 } 1907 1908 int 1909 cfg_strbytelist_insert(struct config_strbytelist** head, char* item, 1910 uint8_t* i2, size_t i2len) 1911 { 1912 struct config_strbytelist* s; 1913 if(!item || !i2 || !head) 1914 return 0; 1915 s = (struct config_strbytelist*)calloc(1, sizeof(*s)); 1916 if(!s) 1917 return 0; 1918 s->str = item; 1919 s->str2 = i2; 1920 s->str2len = i2len; 1921 s->next = *head; 1922 *head = s; 1923 return 1; 1924 } 1925 1926 time_t 1927 cfg_convert_timeval(const char* str) 1928 { 1929 time_t t; 1930 struct tm tm; 1931 memset(&tm, 0, sizeof(tm)); 1932 if(strlen(str) < 14) 1933 return 0; 1934 if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon, 1935 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) 1936 return 0; 1937 tm.tm_year -= 1900; 1938 tm.tm_mon--; 1939 /* Check values */ 1940 if (tm.tm_year < 70) return 0; 1941 if (tm.tm_mon < 0 || tm.tm_mon > 11) return 0; 1942 if (tm.tm_mday < 1 || tm.tm_mday > 31) return 0; 1943 if (tm.tm_hour < 0 || tm.tm_hour > 23) return 0; 1944 if (tm.tm_min < 0 || tm.tm_min > 59) return 0; 1945 if (tm.tm_sec < 0 || tm.tm_sec > 59) return 0; 1946 /* call ldns conversion function */ 1947 t = sldns_mktime_from_utc(&tm); 1948 return t; 1949 } 1950 1951 int 1952 cfg_count_numbers(const char* s) 1953 { 1954 /* format ::= (sp num)+ sp */ 1955 /* num ::= [-](0-9)+ */ 1956 /* sp ::= (space|tab)* */ 1957 int num = 0; 1958 while(*s) { 1959 while(*s && isspace((unsigned char)*s)) 1960 s++; 1961 if(!*s) /* end of string */ 1962 break; 1963 if(*s == '-') 1964 s++; 1965 if(!*s) /* only - not allowed */ 1966 return 0; 1967 if(!isdigit((unsigned char)*s)) /* bad character */ 1968 return 0; 1969 while(*s && isdigit((unsigned char)*s)) 1970 s++; 1971 num++; 1972 } 1973 return num; 1974 } 1975 1976 /** all digit number */ 1977 static int isalldigit(const char* str, size_t l) 1978 { 1979 size_t i; 1980 for(i=0; i<l; i++) 1981 if(!isdigit((unsigned char)str[i])) 1982 return 0; 1983 return 1; 1984 } 1985 1986 int 1987 cfg_parse_memsize(const char* str, size_t* res) 1988 { 1989 size_t len; 1990 size_t mult = 1; 1991 if(!str || (len=(size_t)strlen(str)) == 0) { 1992 log_err("not a size: '%s'", str); 1993 return 0; 1994 } 1995 if(isalldigit(str, len)) { 1996 *res = (size_t)atol(str); 1997 return 1; 1998 } 1999 /* check appended num */ 2000 while(len>0 && str[len-1]==' ') 2001 len--; 2002 if(len > 1 && str[len-1] == 'b') 2003 len--; 2004 else if(len > 1 && str[len-1] == 'B') 2005 len--; 2006 2007 if(len > 1 && tolower((unsigned char)str[len-1]) == 'g') 2008 mult = 1024*1024*1024; 2009 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm') 2010 mult = 1024*1024; 2011 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k') 2012 mult = 1024; 2013 else if(len > 0 && isdigit((unsigned char)str[len-1])) 2014 mult = 1; 2015 else { 2016 log_err("unknown size specifier: '%s'", str); 2017 return 0; 2018 } 2019 while(len>1 && str[len-2]==' ') 2020 len--; 2021 2022 if(!isalldigit(str, len-1)) { 2023 log_err("unknown size specifier: '%s'", str); 2024 return 0; 2025 } 2026 *res = ((size_t)atol(str)) * mult; 2027 return 1; 2028 } 2029 2030 int 2031 find_tag_id(struct config_file* cfg, const char* tag) 2032 { 2033 int i; 2034 for(i=0; i<cfg->num_tags; i++) { 2035 if(strcmp(cfg->tagname[i], tag) == 0) 2036 return i; 2037 } 2038 return -1; 2039 } 2040 2041 int 2042 config_add_tag(struct config_file* cfg, const char* tag) 2043 { 2044 char** newarray; 2045 char* newtag; 2046 if(find_tag_id(cfg, tag) != -1) 2047 return 1; /* nothing to do */ 2048 newarray = (char**)malloc(sizeof(char*)*(cfg->num_tags+1)); 2049 if(!newarray) 2050 return 0; 2051 newtag = strdup(tag); 2052 if(!newtag) { 2053 free(newarray); 2054 return 0; 2055 } 2056 if(cfg->tagname) { 2057 memcpy(newarray, cfg->tagname, sizeof(char*)*cfg->num_tags); 2058 free(cfg->tagname); 2059 } 2060 newarray[cfg->num_tags++] = newtag; 2061 cfg->tagname = newarray; 2062 return 1; 2063 } 2064 2065 /** set a bit in a bit array */ 2066 static void 2067 cfg_set_bit(uint8_t* bitlist, size_t len, int id) 2068 { 2069 int pos = id/8; 2070 log_assert((size_t)pos < len); 2071 (void)len; 2072 bitlist[pos] |= 1<<(id%8); 2073 } 2074 2075 uint8_t* config_parse_taglist(struct config_file* cfg, char* str, 2076 size_t* listlen) 2077 { 2078 uint8_t* taglist = NULL; 2079 size_t len = 0; 2080 char* p, *s; 2081 2082 /* allocate */ 2083 if(cfg->num_tags == 0) { 2084 log_err("parse taglist, but no tags defined"); 2085 return 0; 2086 } 2087 len = (size_t)(cfg->num_tags+7)/8; 2088 taglist = calloc(1, len); 2089 if(!taglist) { 2090 log_err("out of memory"); 2091 return 0; 2092 } 2093 2094 /* parse */ 2095 s = str; 2096 while((p=strsep(&s, " \t\n")) != NULL) { 2097 if(*p) { 2098 int id = find_tag_id(cfg, p); 2099 /* set this bit in the bitlist */ 2100 if(id == -1) { 2101 log_err("unknown tag: %s", p); 2102 free(taglist); 2103 return 0; 2104 } 2105 cfg_set_bit(taglist, len, id); 2106 } 2107 } 2108 2109 *listlen = len; 2110 return taglist; 2111 } 2112 2113 uint8_t* cfg_parse_nsid(const char* str, uint16_t* nsid_len) 2114 { 2115 uint8_t* nsid = NULL; 2116 2117 if (strncasecmp(str, "ascii_", 6) == 0) { 2118 if ((nsid = (uint8_t *)strdup(str + 6))) 2119 *nsid_len = strlen(str + 6); 2120 2121 } else if (strlen(str) % 2) { 2122 ; /* hex string has even number of characters */ 2123 } 2124 2125 else if (*str && (nsid = calloc(1, strlen(str) / 2))) { 2126 const char *ch; 2127 uint8_t *dp; 2128 2129 for ( ch = str, dp = nsid 2130 ; isxdigit(ch[0]) && isxdigit(ch[1]) 2131 ; ch += 2, dp++) { 2132 *dp = (uint8_t)sldns_hexdigit_to_int(ch[0]) * 16; 2133 *dp += (uint8_t)sldns_hexdigit_to_int(ch[1]); 2134 } 2135 if (*ch) { 2136 free(nsid); 2137 nsid = NULL; 2138 } else 2139 *nsid_len = strlen(str) / 2; 2140 } 2141 return nsid; 2142 } 2143 2144 2145 char* config_taglist2str(struct config_file* cfg, uint8_t* taglist, 2146 size_t taglen) 2147 { 2148 char buf[10240]; 2149 size_t i, j, len = 0; 2150 buf[0] = 0; 2151 for(i=0; i<taglen; i++) { 2152 if(taglist[i] == 0) 2153 continue; 2154 for(j=0; j<8; j++) { 2155 if((taglist[i] & (1<<j)) != 0) { 2156 size_t id = i*8 + j; 2157 snprintf(buf+len, sizeof(buf)-len, "%s%s", 2158 (len==0?"":" "), cfg->tagname[id]); 2159 len += strlen(buf+len); 2160 } 2161 } 2162 } 2163 return strdup(buf); 2164 } 2165 2166 int taglist_intersect(uint8_t* list1, size_t list1len, const uint8_t* list2, 2167 size_t list2len) 2168 { 2169 size_t i; 2170 if(!list1 || !list2) 2171 return 0; 2172 for(i=0; i<list1len && i<list2len; i++) { 2173 if((list1[i] & list2[i]) != 0) 2174 return 1; 2175 } 2176 return 0; 2177 } 2178 2179 void 2180 config_apply(struct config_file* config) 2181 { 2182 MAX_TTL = (time_t)config->max_ttl; 2183 MIN_TTL = (time_t)config->min_ttl; 2184 SERVE_EXPIRED = config->serve_expired; 2185 SERVE_EXPIRED_TTL = (time_t)config->serve_expired_ttl; 2186 SERVE_EXPIRED_REPLY_TTL = (time_t)config->serve_expired_reply_ttl; 2187 SERVE_ORIGINAL_TTL = config->serve_original_ttl; 2188 MAX_NEG_TTL = (time_t)config->max_negative_ttl; 2189 RTT_MIN_TIMEOUT = config->infra_cache_min_rtt; 2190 EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size; 2191 MINIMAL_RESPONSES = config->minimal_responses; 2192 RRSET_ROUNDROBIN = config->rrset_roundrobin; 2193 LOG_TAG_QUERYREPLY = config->log_tag_queryreply; 2194 UNKNOWN_SERVER_NICENESS = config->unknown_server_time_limit; 2195 log_set_time_asc(config->log_time_ascii); 2196 autr_permit_small_holddown = config->permit_small_holddown; 2197 stream_wait_max = config->stream_wait_size; 2198 http2_query_buffer_max = config->http_query_buffer_size; 2199 http2_response_buffer_max = config->http_response_buffer_size; 2200 } 2201 2202 void config_lookup_uid(struct config_file* cfg) 2203 { 2204 #ifdef HAVE_GETPWNAM 2205 /* translate username into uid and gid */ 2206 if(cfg->username && cfg->username[0]) { 2207 struct passwd *pwd; 2208 if((pwd = getpwnam(cfg->username)) != NULL) { 2209 cfg_uid = pwd->pw_uid; 2210 cfg_gid = pwd->pw_gid; 2211 } 2212 } 2213 #else 2214 (void)cfg; 2215 #endif 2216 } 2217 2218 /** 2219 * Calculate string length of full pathname in original filesys 2220 * @param fname: the path name to convert. 2221 * Must not be null or empty. 2222 * @param cfg: config struct for chroot and chdir (if set). 2223 * @param use_chdir: if false, only chroot is applied. 2224 * @return length of string. 2225 * remember to allocate one more for 0 at end in mallocs. 2226 */ 2227 static size_t 2228 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) 2229 { 2230 size_t len = 0; 2231 int slashit = 0; 2232 if(cfg->chrootdir && cfg->chrootdir[0] && 2233 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { 2234 /* already full pathname, return it */ 2235 return strlen(fname); 2236 } 2237 /* chroot */ 2238 if(cfg->chrootdir && cfg->chrootdir[0]) { 2239 /* start with chrootdir */ 2240 len += strlen(cfg->chrootdir); 2241 slashit = 1; 2242 } 2243 /* chdir */ 2244 #ifdef UB_ON_WINDOWS 2245 if(fname[0] != 0 && fname[1] == ':') { 2246 /* full path, no chdir */ 2247 } else 2248 #endif 2249 if(fname[0] == '/' || !use_chdir) { 2250 /* full path, no chdir */ 2251 } else if(cfg->directory && cfg->directory[0]) { 2252 /* prepend chdir */ 2253 if(slashit && cfg->directory[0] != '/') 2254 len++; 2255 if(cfg->chrootdir && cfg->chrootdir[0] && 2256 strncmp(cfg->chrootdir, cfg->directory, 2257 strlen(cfg->chrootdir)) == 0) 2258 len += strlen(cfg->directory)-strlen(cfg->chrootdir); 2259 else len += strlen(cfg->directory); 2260 slashit = 1; 2261 } 2262 /* fname */ 2263 if(slashit && fname[0] != '/') 2264 len++; 2265 len += strlen(fname); 2266 return len; 2267 } 2268 2269 char* 2270 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) 2271 { 2272 size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1; 2273 int slashit = 0; 2274 char* buf = (char*)malloc(len); 2275 if(!buf) 2276 return NULL; 2277 buf[0] = 0; 2278 /* is fname already in chroot ? */ 2279 if(cfg->chrootdir && cfg->chrootdir[0] && 2280 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { 2281 /* already full pathname, return it */ 2282 (void)strlcpy(buf, fname, len); 2283 buf[len-1] = 0; 2284 return buf; 2285 } 2286 /* chroot */ 2287 if(cfg->chrootdir && cfg->chrootdir[0]) { 2288 /* start with chrootdir */ 2289 (void)strlcpy(buf, cfg->chrootdir, len); 2290 slashit = 1; 2291 } 2292 #ifdef UB_ON_WINDOWS 2293 if(fname[0] != 0 && fname[1] == ':') { 2294 /* full path, no chdir */ 2295 } else 2296 #endif 2297 /* chdir */ 2298 if(fname[0] == '/' || !use_chdir) { 2299 /* full path, no chdir */ 2300 } else if(cfg->directory && cfg->directory[0]) { 2301 /* prepend chdir */ 2302 if(slashit && cfg->directory[0] != '/') 2303 (void)strlcat(buf, "/", len); 2304 /* is the directory already in the chroot? */ 2305 if(cfg->chrootdir && cfg->chrootdir[0] && 2306 strncmp(cfg->chrootdir, cfg->directory, 2307 strlen(cfg->chrootdir)) == 0) 2308 (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir), 2309 len); 2310 else (void)strlcat(buf, cfg->directory, len); 2311 slashit = 1; 2312 } 2313 /* fname */ 2314 if(slashit && fname[0] != '/') 2315 (void)strlcat(buf, "/", len); 2316 (void)strlcat(buf, fname, len); 2317 buf[len-1] = 0; 2318 return buf; 2319 } 2320 2321 /** return next space character in string */ 2322 static char* next_space_pos(const char* str) 2323 { 2324 char* sp = strchr(str, ' '); 2325 char* tab = strchr(str, '\t'); 2326 if(!tab && !sp) 2327 return NULL; 2328 if(!sp) return tab; 2329 if(!tab) return sp; 2330 return (sp<tab)?sp:tab; 2331 } 2332 2333 /** return last space character in string */ 2334 static char* last_space_pos(const char* str) 2335 { 2336 char* sp = strrchr(str, ' '); 2337 char* tab = strrchr(str, '\t'); 2338 if(!tab && !sp) 2339 return NULL; 2340 if(!sp) return tab; 2341 if(!tab) return sp; 2342 return (sp>tab)?sp:tab; 2343 } 2344 2345 int 2346 cfg_parse_local_zone(struct config_file* cfg, const char* val) 2347 { 2348 const char *type, *name_end, *name; 2349 char buf[256]; 2350 2351 /* parse it as: [zone_name] [between stuff] [zone_type] */ 2352 name = val; 2353 while(*name && isspace((unsigned char)*name)) 2354 name++; 2355 if(!*name) { 2356 log_err("syntax error: too short: %s", val); 2357 return 0; 2358 } 2359 name_end = next_space_pos(name); 2360 if(!name_end || !*name_end) { 2361 log_err("syntax error: expected zone type: %s", val); 2362 return 0; 2363 } 2364 if (name_end - name > 255) { 2365 log_err("syntax error: bad zone name: %s", val); 2366 return 0; 2367 } 2368 (void)strlcpy(buf, name, sizeof(buf)); 2369 buf[name_end-name] = '\0'; 2370 2371 type = last_space_pos(name_end); 2372 while(type && *type && isspace((unsigned char)*type)) 2373 type++; 2374 if(!type || !*type) { 2375 log_err("syntax error: expected zone type: %s", val); 2376 return 0; 2377 } 2378 2379 if(strcmp(type, "nodefault")==0) { 2380 return cfg_strlist_insert(&cfg->local_zones_nodefault, 2381 strdup(name)); 2382 #ifdef USE_IPSET 2383 } else if(strcmp(type, "ipset")==0) { 2384 return cfg_strlist_insert(&cfg->local_zones_ipset, 2385 strdup(name)); 2386 #endif 2387 } else { 2388 return cfg_str2list_insert(&cfg->local_zones, strdup(buf), 2389 strdup(type)); 2390 } 2391 } 2392 2393 char* cfg_ptr_reverse(char* str) 2394 { 2395 char* ip, *ip_end; 2396 char* name; 2397 char* result; 2398 char buf[1024]; 2399 struct sockaddr_storage addr; 2400 socklen_t addrlen; 2401 2402 /* parse it as: [IP] [between stuff] [name] */ 2403 ip = str; 2404 while(*ip && isspace((unsigned char)*ip)) 2405 ip++; 2406 if(!*ip) { 2407 log_err("syntax error: too short: %s", str); 2408 return NULL; 2409 } 2410 ip_end = next_space_pos(ip); 2411 if(!ip_end || !*ip_end) { 2412 log_err("syntax error: expected name: %s", str); 2413 return NULL; 2414 } 2415 2416 name = last_space_pos(ip_end); 2417 if(!name || !*name) { 2418 log_err("syntax error: expected name: %s", str); 2419 return NULL; 2420 } 2421 2422 sscanf(ip, "%100s", buf); 2423 buf[sizeof(buf)-1]=0; 2424 2425 if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) { 2426 log_err("syntax error: cannot parse address: %s", str); 2427 return NULL; 2428 } 2429 2430 /* reverse IPv4: 2431 * ddd.ddd.ddd.ddd.in-addr-arpa. 2432 * IPv6: (h.){32}.ip6.arpa. */ 2433 2434 if(addr_is_ip6(&addr, addrlen)) { 2435 uint8_t ad[16]; 2436 const char* hex = "0123456789abcdef"; 2437 char *p = buf; 2438 int i; 2439 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr, 2440 sizeof(ad)); 2441 for(i=15; i>=0; i--) { 2442 uint8_t b = ad[i]; 2443 *p++ = hex[ (b&0x0f) ]; 2444 *p++ = '.'; 2445 *p++ = hex[ (b&0xf0) >> 4 ]; 2446 *p++ = '.'; 2447 } 2448 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. "); 2449 } else { 2450 uint8_t ad[4]; 2451 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr, 2452 sizeof(ad)); 2453 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ", 2454 (unsigned)ad[3], (unsigned)ad[2], 2455 (unsigned)ad[1], (unsigned)ad[0]); 2456 } 2457 2458 /* printed the reverse address, now the between goop and name on end */ 2459 while(*ip_end && isspace((unsigned char)*ip_end)) 2460 ip_end++; 2461 if(name>ip_end) { 2462 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s", 2463 (int)(name-ip_end), ip_end); 2464 } 2465 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name); 2466 2467 result = strdup(buf); 2468 if(!result) { 2469 log_err("out of memory parsing %s", str); 2470 return NULL; 2471 } 2472 return result; 2473 } 2474 2475 #ifdef UB_ON_WINDOWS 2476 char* 2477 w_lookup_reg_str(const char* key, const char* name) 2478 { 2479 HKEY hk = NULL; 2480 DWORD type = 0; 2481 BYTE buf[1024]; 2482 DWORD len = (DWORD)sizeof(buf); 2483 LONG ret; 2484 char* result = NULL; 2485 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk); 2486 if(ret == ERROR_FILE_NOT_FOUND) 2487 return NULL; /* key does not exist */ 2488 else if(ret != ERROR_SUCCESS) { 2489 log_err("RegOpenKeyEx failed"); 2490 return NULL; 2491 } 2492 ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len); 2493 if(RegCloseKey(hk)) 2494 log_err("RegCloseKey"); 2495 if(ret == ERROR_FILE_NOT_FOUND) 2496 return NULL; /* name does not exist */ 2497 else if(ret != ERROR_SUCCESS) { 2498 log_err("RegQueryValueEx failed"); 2499 return NULL; 2500 } 2501 if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) { 2502 buf[sizeof(buf)-1] = 0; 2503 buf[sizeof(buf)-2] = 0; /* for multi_sz */ 2504 result = strdup((char*)buf); 2505 if(!result) log_err("out of memory"); 2506 } 2507 return result; 2508 } 2509 2510 void w_config_adjust_directory(struct config_file* cfg) 2511 { 2512 if(cfg->directory && cfg->directory[0]) { 2513 TCHAR dirbuf[2*MAX_PATH+4]; 2514 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) { 2515 /* get executable path, and if that contains 2516 * directories, snip off the filename part */ 2517 dirbuf[0] = 0; 2518 if(!GetModuleFileName(NULL, dirbuf, MAX_PATH)) 2519 log_err("could not GetModuleFileName"); 2520 if(strrchr(dirbuf, '\\')) { 2521 (strrchr(dirbuf, '\\'))[0] = 0; 2522 } else log_err("GetModuleFileName had no path"); 2523 if(dirbuf[0]) { 2524 /* adjust directory for later lookups to work*/ 2525 free(cfg->directory); 2526 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1); 2527 } 2528 } 2529 } 2530 } 2531 #endif /* UB_ON_WINDOWS */ 2532 2533 void errinf(struct module_qstate* qstate, const char* str) 2534 { 2535 struct config_strlist* p; 2536 if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str) 2537 return; 2538 p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p)); 2539 if(!p) { 2540 log_err("malloc failure in validator-error-info string"); 2541 return; 2542 } 2543 p->next = NULL; 2544 p->str = regional_strdup(qstate->region, str); 2545 if(!p->str) { 2546 log_err("malloc failure in validator-error-info string"); 2547 return; 2548 } 2549 /* add at end */ 2550 if(qstate->errinf) { 2551 struct config_strlist* q = qstate->errinf; 2552 while(q->next) 2553 q = q->next; 2554 q->next = p; 2555 } else qstate->errinf = p; 2556 } 2557 2558 void errinf_origin(struct module_qstate* qstate, struct sock_list *origin) 2559 { 2560 struct sock_list* p; 2561 if(qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) 2562 return; 2563 for(p=origin; p; p=p->next) { 2564 char buf[256]; 2565 if(p == origin) 2566 snprintf(buf, sizeof(buf), "from "); 2567 else snprintf(buf, sizeof(buf), "and "); 2568 if(p->len == 0) 2569 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), 2570 "cache"); 2571 else 2572 addr_to_str(&p->addr, p->len, buf+strlen(buf), 2573 sizeof(buf)-strlen(buf)); 2574 errinf(qstate, buf); 2575 } 2576 } 2577 2578 char* errinf_to_str_bogus(struct module_qstate* qstate) 2579 { 2580 char buf[20480]; 2581 char* p = buf; 2582 size_t left = sizeof(buf); 2583 struct config_strlist* s; 2584 char dname[LDNS_MAX_DOMAINLEN+1]; 2585 char t[16], c[16]; 2586 sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t)); 2587 sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c)); 2588 dname_str(qstate->qinfo.qname, dname); 2589 snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c); 2590 left -= strlen(p); p += strlen(p); 2591 if(!qstate->errinf) 2592 snprintf(p, left, " misc failure"); 2593 else for(s=qstate->errinf; s; s=s->next) { 2594 snprintf(p, left, " %s", s->str); 2595 left -= strlen(p); p += strlen(p); 2596 } 2597 p = strdup(buf); 2598 if(!p) 2599 log_err("malloc failure in errinf_to_str"); 2600 return p; 2601 } 2602 2603 char* errinf_to_str_servfail(struct module_qstate* qstate) 2604 { 2605 char buf[20480]; 2606 char* p = buf; 2607 size_t left = sizeof(buf); 2608 struct config_strlist* s; 2609 char dname[LDNS_MAX_DOMAINLEN+1]; 2610 char t[16], c[16]; 2611 sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t)); 2612 sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c)); 2613 dname_str(qstate->qinfo.qname, dname); 2614 snprintf(p, left, "SERVFAIL <%s %s %s>:", dname, t, c); 2615 left -= strlen(p); p += strlen(p); 2616 if(!qstate->errinf) 2617 snprintf(p, left, " misc failure"); 2618 else for(s=qstate->errinf; s; s=s->next) { 2619 snprintf(p, left, " %s", s->str); 2620 left -= strlen(p); p += strlen(p); 2621 } 2622 p = strdup(buf); 2623 if(!p) 2624 log_err("malloc failure in errinf_to_str"); 2625 return p; 2626 } 2627 2628 void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr) 2629 { 2630 char buf[1024]; 2631 char dname[LDNS_MAX_DOMAINLEN+1]; 2632 char t[16], c[16]; 2633 if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !rr) 2634 return; 2635 sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t)); 2636 sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c)); 2637 dname_str(rr->rk.dname, dname); 2638 snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c); 2639 errinf(qstate, buf); 2640 } 2641 2642 void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname) 2643 { 2644 char b[1024]; 2645 char buf[LDNS_MAX_DOMAINLEN+1]; 2646 if((qstate->env->cfg->val_log_level < 2 && !qstate->env->cfg->log_servfail) || !str || !dname) 2647 return; 2648 dname_str(dname, buf); 2649 snprintf(b, sizeof(b), "%s %s", str, buf); 2650 errinf(qstate, b); 2651 } 2652 2653 int options_remote_is_address(struct config_file* cfg) 2654 { 2655 if(!cfg->remote_control_enable) return 0; 2656 if(!cfg->control_ifs.first) return 1; 2657 if(!cfg->control_ifs.first->str) return 1; 2658 if(cfg->control_ifs.first->str[0] == 0) return 1; 2659 return (cfg->control_ifs.first->str[0] != '/'); 2660 } 2661 2662 /** see if interface is https, its port number == the https port number */ 2663 int 2664 if_is_https(const char* ifname, const char* port, int https_port) 2665 { 2666 char* p = strchr(ifname, '@'); 2667 if(!p && atoi(port) == https_port) 2668 return 1; 2669 if(p && atoi(p+1) == https_port) 2670 return 1; 2671 return 0; 2672 } 2673 2674 /** see if config contains https turned on */ 2675 int cfg_has_https(struct config_file* cfg) 2676 { 2677 int i; 2678 char portbuf[32]; 2679 snprintf(portbuf, sizeof(portbuf), "%d", cfg->port); 2680 for(i = 0; i<cfg->num_ifs; i++) { 2681 if(if_is_https(cfg->ifs[i], portbuf, cfg->https_port)) 2682 return 1; 2683 } 2684 return 0; 2685 } 2686