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