config_file.c revision 294190
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#ifdef HAVE_GLOB_H 63# include <glob.h> 64#endif 65#ifdef HAVE_PWD_H 66#include <pwd.h> 67#endif 68 69/** from cfg username, after daemonise setup performed */ 70uid_t cfg_uid = (uid_t)-1; 71/** from cfg username, after daemonise setup performed */ 72gid_t cfg_gid = (gid_t)-1; 73/** for debug allow small timeout values for fast rollovers */ 74int autr_permit_small_holddown = 0; 75 76/** global config during parsing */ 77struct config_parser_state* cfg_parser = 0; 78 79/** init ports possible for use */ 80static void init_outgoing_availports(int* array, int num); 81 82struct config_file* 83config_create(void) 84{ 85 struct config_file* cfg; 86 cfg = (struct config_file*)calloc(1, sizeof(struct config_file)); 87 if(!cfg) 88 return NULL; 89 /* the defaults if no config is present */ 90 cfg->verbosity = 1; 91 cfg->stat_interval = 0; 92 cfg->stat_cumulative = 0; 93 cfg->stat_extended = 0; 94 cfg->num_threads = 1; 95 cfg->port = UNBOUND_DNS_PORT; 96 cfg->do_ip4 = 1; 97 cfg->do_ip6 = 1; 98 cfg->do_udp = 1; 99 cfg->do_tcp = 1; 100 cfg->tcp_upstream = 0; 101 cfg->ssl_service_key = NULL; 102 cfg->ssl_service_pem = NULL; 103 cfg->ssl_port = 853; 104 cfg->ssl_upstream = 0; 105 cfg->use_syslog = 1; 106 cfg->log_time_ascii = 0; 107 cfg->log_queries = 0; 108#ifndef USE_WINSOCK 109# ifdef USE_MINI_EVENT 110 /* select max 1024 sockets */ 111 cfg->outgoing_num_ports = 960; 112 cfg->num_queries_per_thread = 512; 113# else 114 /* libevent can use many sockets */ 115 cfg->outgoing_num_ports = 4096; 116 cfg->num_queries_per_thread = 1024; 117# endif 118 cfg->outgoing_num_tcp = 10; 119 cfg->incoming_num_tcp = 10; 120#else 121 cfg->outgoing_num_ports = 48; /* windows is limited in num fds */ 122 cfg->num_queries_per_thread = 24; 123 cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */ 124 cfg->incoming_num_tcp = 2; 125#endif 126 cfg->edns_buffer_size = 4096; /* 4k from rfc recommendation */ 127 cfg->msg_buffer_size = 65552; /* 64 k + a small margin */ 128 cfg->msg_cache_size = 4 * 1024 * 1024; 129 cfg->msg_cache_slabs = 4; 130 cfg->jostle_time = 200; 131 cfg->rrset_cache_size = 4 * 1024 * 1024; 132 cfg->rrset_cache_slabs = 4; 133 cfg->host_ttl = 900; 134 cfg->bogus_ttl = 60; 135 cfg->min_ttl = 0; 136 cfg->max_ttl = 3600 * 24; 137 cfg->max_negative_ttl = 3600; 138 cfg->prefetch = 0; 139 cfg->prefetch_key = 0; 140 cfg->infra_cache_slabs = 4; 141 cfg->infra_cache_numhosts = 10000; 142 cfg->infra_cache_min_rtt = 50; 143 cfg->delay_close = 0; 144 if(!(cfg->outgoing_avail_ports = (int*)calloc(65536, sizeof(int)))) 145 goto error_exit; 146 init_outgoing_availports(cfg->outgoing_avail_ports, 65536); 147 if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit; 148#ifdef HAVE_CHROOT 149 if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit; 150#endif 151 if(!(cfg->directory = strdup(RUN_DIR))) goto error_exit; 152 if(!(cfg->logfile = strdup(""))) goto error_exit; 153 if(!(cfg->pidfile = strdup(PIDFILE))) goto error_exit; 154 if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit; 155 cfg->donotqueryaddrs = NULL; 156 cfg->donotquery_localhost = 1; 157 cfg->root_hints = NULL; 158 cfg->do_daemonize = 1; 159 cfg->if_automatic = 0; 160 cfg->so_rcvbuf = 0; 161 cfg->so_sndbuf = 0; 162 cfg->so_reuseport = 0; 163 cfg->ip_transparent = 0; 164 cfg->num_ifs = 0; 165 cfg->ifs = NULL; 166 cfg->num_out_ifs = 0; 167 cfg->out_ifs = NULL; 168 cfg->stubs = NULL; 169 cfg->forwards = NULL; 170 cfg->acls = NULL; 171 cfg->harden_short_bufsize = 0; 172 cfg->harden_large_queries = 0; 173 cfg->harden_glue = 1; 174 cfg->harden_dnssec_stripped = 1; 175 cfg->harden_below_nxdomain = 0; 176 cfg->harden_referral_path = 0; 177 cfg->harden_algo_downgrade = 0; 178 cfg->use_caps_bits_for_id = 0; 179 cfg->caps_whitelist = NULL; 180 cfg->private_address = NULL; 181 cfg->private_domain = NULL; 182 cfg->unwanted_threshold = 0; 183 cfg->hide_identity = 0; 184 cfg->hide_version = 0; 185 cfg->identity = NULL; 186 cfg->version = NULL; 187 cfg->auto_trust_anchor_file_list = NULL; 188 cfg->trust_anchor_file_list = NULL; 189 cfg->trust_anchor_list = NULL; 190 cfg->trusted_keys_file_list = NULL; 191 cfg->dlv_anchor_file = NULL; 192 cfg->dlv_anchor_list = NULL; 193 cfg->domain_insecure = NULL; 194 cfg->val_date_override = 0; 195 cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */ 196 cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */ 197 cfg->val_clean_additional = 1; 198 cfg->val_log_level = 0; 199 cfg->val_log_squelch = 0; 200 cfg->val_permissive_mode = 0; 201 cfg->ignore_cd = 0; 202 cfg->add_holddown = 30*24*3600; 203 cfg->del_holddown = 30*24*3600; 204 cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */ 205 cfg->permit_small_holddown = 0; 206 cfg->key_cache_size = 4 * 1024 * 1024; 207 cfg->key_cache_slabs = 4; 208 cfg->neg_cache_size = 1 * 1024 * 1024; 209 cfg->local_zones = NULL; 210 cfg->local_zones_nodefault = NULL; 211 cfg->local_data = NULL; 212 cfg->unblock_lan_zones = 0; 213 cfg->python_script = NULL; 214 cfg->remote_control_enable = 0; 215 cfg->control_ifs = NULL; 216 cfg->control_port = UNBOUND_CONTROL_PORT; 217 cfg->remote_control_use_cert = 1; 218 cfg->minimal_responses = 0; 219 cfg->rrset_roundrobin = 0; 220 cfg->max_udp_size = 4096; 221 if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key"))) 222 goto error_exit; 223 if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem"))) 224 goto error_exit; 225 if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key"))) 226 goto error_exit; 227 if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem"))) 228 goto error_exit; 229 230 if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit; 231 if(!(cfg->val_nsec3_key_iterations = 232 strdup("1024 150 2048 500 4096 2500"))) goto error_exit; 233#if defined(DNSTAP_SOCKET_PATH) 234 if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH))) 235 goto error_exit; 236#endif 237 cfg->ratelimit = 0; 238 cfg->ratelimit_slabs = 4; 239 cfg->ratelimit_size = 4*1024*1024; 240 cfg->ratelimit_for_domain = NULL; 241 cfg->ratelimit_below_domain = NULL; 242 cfg->ratelimit_factor = 10; 243 cfg->qname_minimisation = 0; 244 return cfg; 245error_exit: 246 config_delete(cfg); 247 return NULL; 248} 249 250struct config_file* config_create_forlib(void) 251{ 252 struct config_file* cfg = config_create(); 253 if(!cfg) return NULL; 254 /* modifications for library use, less verbose, less memory */ 255 free(cfg->chrootdir); 256 cfg->chrootdir = NULL; 257 cfg->verbosity = 0; 258 cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable' 259 and probably within the ulimit(maxfds) of the user */ 260 cfg->outgoing_num_tcp = 2; 261 cfg->msg_cache_size = 1024*1024; 262 cfg->msg_cache_slabs = 1; 263 cfg->rrset_cache_size = 1024*1024; 264 cfg->rrset_cache_slabs = 1; 265 cfg->infra_cache_slabs = 1; 266 cfg->use_syslog = 0; 267 cfg->key_cache_size = 1024*1024; 268 cfg->key_cache_slabs = 1; 269 cfg->neg_cache_size = 100 * 1024; 270 cfg->donotquery_localhost = 0; /* allow, so that you can ask a 271 forward nameserver running on localhost */ 272 cfg->val_log_level = 2; /* to fill why_bogus with */ 273 cfg->val_log_squelch = 1; 274 return cfg; 275} 276 277/** check that the value passed is >= 0 */ 278#define IS_NUMBER_OR_ZERO \ 279 if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0 280/** check that the value passed is > 0 */ 281#define IS_NONZERO_NUMBER \ 282 if(atoi(val) == 0) return 0 283/** check that the value passed is not 0 and a power of 2 */ 284#define IS_POW2_NUMBER \ 285 if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0 286/** check that the value passed is yes or no */ 287#define IS_YES_OR_NO \ 288 if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0 289/** put integer_or_zero into variable */ 290#define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 291 { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); } 292/** put integer_nonzero into variable */ 293#define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \ 294 { IS_NONZERO_NUMBER; cfg->var = atoi(val); } 295/** put integer_or_zero into unsigned */ 296#define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 297 { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); } 298/** put integer_or_zero into size_t */ 299#define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \ 300 { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); } 301/** put integer_nonzero into size_t */ 302#define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \ 303 { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); } 304/** put yesno into variable */ 305#define S_YNO(str, var) if(strcmp(opt, str) == 0) \ 306 { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); } 307/** put memsize into variable */ 308#define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \ 309 { return cfg_parse_memsize(val, &cfg->var); } 310/** put pow2 number into variable */ 311#define S_POW2(str, var) if(strcmp(opt, str)==0) \ 312 { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); } 313/** put string into variable */ 314#define S_STR(str, var) if(strcmp(opt, str)==0) \ 315 { free(cfg->var); return (cfg->var = strdup(val)) != NULL; } 316/** put string into strlist */ 317#define S_STRLIST(str, var) if(strcmp(opt, str)==0) \ 318 { return cfg_strlist_insert(&cfg->var, strdup(val)); } 319 320int config_set_option(struct config_file* cfg, const char* opt, 321 const char* val) 322{ 323 S_NUMBER_OR_ZERO("verbosity:", verbosity) 324 else if(strcmp(opt, "statistics-interval:") == 0) { 325 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0) 326 cfg->stat_interval = 0; 327 else if(atoi(val) == 0) 328 return 0; 329 else cfg->stat_interval = atoi(val); 330 } else if(strcmp(opt, "num_threads:") == 0) { 331 /* not supported, library must have 1 thread in bgworker */ 332 return 0; 333 } else if(strcmp(opt, "outgoing-port-permit:") == 0) { 334 return cfg_mark_ports(val, 1, 335 cfg->outgoing_avail_ports, 65536); 336 } else if(strcmp(opt, "outgoing-port-avoid:") == 0) { 337 return cfg_mark_ports(val, 0, 338 cfg->outgoing_avail_ports, 65536); 339 } else if(strcmp(opt, "local-zone:") == 0) { 340 return cfg_parse_local_zone(cfg, val); 341 } else if(strcmp(opt, "val-override-date:") == 0) { 342 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) { 343 cfg->val_date_override = 0; 344 } else if(strlen(val) == 14) { 345 cfg->val_date_override = cfg_convert_timeval(val); 346 return cfg->val_date_override != 0; 347 } else { 348 if(atoi(val) == 0) return 0; 349 cfg->val_date_override = (uint32_t)atoi(val); 350 } 351 } else if(strcmp(opt, "local-data-ptr:") == 0) { 352 char* ptr = cfg_ptr_reverse((char*)opt); 353 return cfg_strlist_insert(&cfg->local_data, ptr); 354 } else if(strcmp(opt, "logfile:") == 0) { 355 cfg->use_syslog = 0; 356 free(cfg->logfile); 357 return (cfg->logfile = strdup(val)) != NULL; 358 } 359 else if(strcmp(opt, "log-time-ascii:") == 0) 360 { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0); 361 log_set_time_asc(cfg->log_time_ascii); } 362 else S_SIZET_NONZERO("max-udp-size:", max_udp_size) 363 else S_YNO("use-syslog:", use_syslog) 364 else S_YNO("extended-statistics:", stat_extended) 365 else S_YNO("statistics-cumulative:", stat_cumulative) 366 else S_YNO("do-ip4:", do_ip4) 367 else S_YNO("do-ip6:", do_ip6) 368 else S_YNO("do-udp:", do_udp) 369 else S_YNO("do-tcp:", do_tcp) 370 else S_YNO("tcp-upstream:", tcp_upstream) 371 else S_YNO("ssl-upstream:", ssl_upstream) 372 else S_STR("ssl-service-key:", ssl_service_key) 373 else S_STR("ssl-service-pem:", ssl_service_pem) 374 else S_NUMBER_NONZERO("ssl-port:", ssl_port) 375 else S_YNO("interface-automatic:", if_automatic) 376 else S_YNO("do-daemonize:", do_daemonize) 377 else S_NUMBER_NONZERO("port:", port) 378 else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports) 379 else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp) 380 else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp) 381 else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size) 382 else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size) 383 else S_MEMSIZE("msg-cache-size:", msg_cache_size) 384 else S_POW2("msg-cache-slabs:", msg_cache_slabs) 385 else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread) 386 else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time) 387 else S_MEMSIZE("so-rcvbuf:", so_rcvbuf) 388 else S_MEMSIZE("so-sndbuf:", so_sndbuf) 389 else S_YNO("so-reuseport:", so_reuseport) 390 else S_YNO("ip-transparent:", ip_transparent) 391 else S_MEMSIZE("rrset-cache-size:", rrset_cache_size) 392 else S_POW2("rrset-cache-slabs:", rrset_cache_slabs) 393 else S_YNO("prefetch:", prefetch) 394 else S_YNO("prefetch-key:", prefetch_key) 395 else if(strcmp(opt, "cache-max-ttl:") == 0) 396 { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;} 397 else if(strcmp(opt, "cache-max-negative-ttl:") == 0) 398 { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;} 399 else if(strcmp(opt, "cache-min-ttl:") == 0) 400 { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;} 401 else if(strcmp(opt, "infra-cache-min-rtt:") == 0) { 402 IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val); 403 RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt; 404 } 405 else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl) 406 else S_POW2("infra-cache-slabs:", infra_cache_slabs) 407 else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts) 408 else S_NUMBER_OR_ZERO("delay-close:", delay_close) 409 else S_STR("chroot:", chrootdir) 410 else S_STR("username:", username) 411 else S_STR("directory:", directory) 412 else S_STR("pidfile:", pidfile) 413 else S_YNO("hide-identity:", hide_identity) 414 else S_YNO("hide-version:", hide_version) 415 else S_STR("identity:", identity) 416 else S_STR("version:", version) 417 else S_STRLIST("root-hints:", root_hints) 418 else S_STR("target-fetch-policy:", target_fetch_policy) 419 else S_YNO("harden-glue:", harden_glue) 420 else S_YNO("harden-short-bufsize:", harden_short_bufsize) 421 else S_YNO("harden-large-queries:", harden_large_queries) 422 else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped) 423 else S_YNO("harden-below-nxdomain:", harden_below_nxdomain) 424 else S_YNO("harden-referral-path:", harden_referral_path) 425 else S_YNO("harden-algo-downgrade:", harden_algo_downgrade) 426 else S_YNO("use-caps-for-id", use_caps_bits_for_id) 427 else S_STRLIST("caps-whitelist:", caps_whitelist) 428 else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold) 429 else S_STRLIST("private-address:", private_address) 430 else S_STRLIST("private-domain:", private_domain) 431 else S_YNO("do-not-query-localhost:", donotquery_localhost) 432 else S_STRLIST("do-not-query-address:", donotqueryaddrs) 433 else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list) 434 else S_STRLIST("trust-anchor-file:", trust_anchor_file_list) 435 else S_STRLIST("trust-anchor:", trust_anchor_list) 436 else S_STRLIST("trusted-keys-file:", trusted_keys_file_list) 437 else S_STR("dlv-anchor-file:", dlv_anchor_file) 438 else S_STRLIST("dlv-anchor:", dlv_anchor_list) 439 else S_STRLIST("domain-insecure:", domain_insecure) 440 else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl) 441 else S_YNO("val-clean-additional:", val_clean_additional) 442 else S_NUMBER_OR_ZERO("val-log-level:", val_log_level) 443 else S_YNO("val-log-squelch:", val_log_squelch) 444 else S_YNO("log-queries:", log_queries) 445 else S_YNO("val-permissive-mode:", val_permissive_mode) 446 else S_YNO("ignore-cd-flag:", ignore_cd) 447 else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations) 448 else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown) 449 else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown) 450 else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing) 451 else if(strcmp(opt, "permit-small-holddown:") == 0) 452 { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0); 453 autr_permit_small_holddown = cfg->permit_small_holddown; } 454 else S_MEMSIZE("key-cache-size:", key_cache_size) 455 else S_POW2("key-cache-slabs:", key_cache_slabs) 456 else S_MEMSIZE("neg-cache-size:", neg_cache_size) 457 else S_YNO("minimal-responses:", minimal_responses) 458 else S_YNO("rrset-roundrobin:", rrset_roundrobin) 459 else S_STRLIST("local-data:", local_data) 460 else S_YNO("unblock-lan-zones:", unblock_lan_zones) 461 else S_YNO("control-enable:", remote_control_enable) 462 else S_STRLIST("control-interface:", control_ifs) 463 else S_NUMBER_NONZERO("control-port:", control_port) 464 else S_STR("server-key-file:", server_key_file) 465 else S_STR("server-cert-file:", server_cert_file) 466 else S_STR("control-key-file:", control_key_file) 467 else S_STR("control-cert-file:", control_cert_file) 468 else S_STR("module-config:", module_conf) 469 else S_STR("python-script:", python_script) 470 else if(strcmp(opt, "ratelimit:") == 0) { 471 IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val); 472 infra_dp_ratelimit=cfg->ratelimit; 473 } 474 else S_MEMSIZE("ratelimit-size:", ratelimit_size) 475 else S_POW2("ratelimit-slabs:", ratelimit_slabs) 476 else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor) 477 else S_YNO("qname-minimisation:", qname_minimisation) 478 /* val_sig_skew_min and max are copied into val_env during init, 479 * so this does not update val_env with set_option */ 480 else if(strcmp(opt, "val-sig-skew-min:") == 0) 481 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); } 482 else if(strcmp(opt, "val-sig-skew-max:") == 0) 483 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); } 484 else if (strcmp(opt, "outgoing-interface:") == 0) { 485 char* d = strdup(val); 486 char** oi = 487 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*)); 488 if(!d || !oi) { free(d); free(oi); return -1; } 489 if(cfg->out_ifs && cfg->num_out_ifs) { 490 memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*)); 491 free(cfg->out_ifs); 492 } 493 oi[cfg->num_out_ifs++] = d; 494 cfg->out_ifs = oi; 495 } else { 496 /* unknown or unsupported (from the set_option interface): 497 * interface, outgoing-interface, access-control, 498 * stub-zone, name, stub-addr, stub-host, stub-prime 499 * forward-first, stub-first, 500 * forward-zone, name, forward-addr, forward-host, 501 * ratelimit-for-domain, ratelimit-below-domain */ 502 return 0; 503 } 504 return 1; 505} 506 507void config_print_func(char* line, void* arg) 508{ 509 FILE* f = (FILE*)arg; 510 (void)fprintf(f, "%s\n", line); 511} 512 513/** collate func arg */ 514struct config_collate_arg { 515 /** list of result items */ 516 struct config_strlist_head list; 517 /** if a malloc error occurred, 0 is OK */ 518 int status; 519}; 520 521void config_collate_func(char* line, void* arg) 522{ 523 struct config_collate_arg* m = (struct config_collate_arg*)arg; 524 if(m->status) 525 return; 526 if(!cfg_strlist_append(&m->list, strdup(line))) 527 m->status = 1; 528} 529 530int config_get_option_list(struct config_file* cfg, const char* opt, 531 struct config_strlist** list) 532{ 533 struct config_collate_arg m; 534 memset(&m, 0, sizeof(m)); 535 *list = NULL; 536 if(!config_get_option(cfg, opt, config_collate_func, &m)) 537 return 1; 538 if(m.status) { 539 config_delstrlist(m.list.first); 540 return 2; 541 } 542 *list = m.list.first; 543 return 0; 544} 545 546int 547config_get_option_collate(struct config_file* cfg, const char* opt, char** str) 548{ 549 struct config_strlist* list = NULL; 550 int r; 551 *str = NULL; 552 if((r = config_get_option_list(cfg, opt, &list)) != 0) 553 return r; 554 *str = config_collate_cat(list); 555 config_delstrlist(list); 556 if(!*str) return 2; 557 return 0; 558} 559 560char* 561config_collate_cat(struct config_strlist* list) 562{ 563 size_t total = 0, left; 564 struct config_strlist* s; 565 char *r, *w; 566 if(!list) /* no elements */ 567 return strdup(""); 568 if(list->next == NULL) /* one element , no newline at end. */ 569 return strdup(list->str); 570 /* count total length */ 571 for(s=list; s; s=s->next) 572 total += strlen(s->str) + 1; /* len + newline */ 573 left = total+1; /* one extra for nul at end */ 574 r = malloc(left); 575 if(!r) 576 return NULL; 577 w = r; 578 for(s=list; s; s=s->next) { 579 size_t this = strlen(s->str); 580 if(this+2 > left) { /* sanity check */ 581 free(r); 582 return NULL; 583 } 584 snprintf(w, left, "%s\n", s->str); 585 this = strlen(w); 586 w += this; 587 left -= this; 588 } 589 return r; 590} 591 592/** compare and print decimal option */ 593#define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \ 594 {snprintf(buf, len, "%d", (int)cfg->var); \ 595 func(buf, arg);} 596/** compare and print unsigned option */ 597#define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \ 598 {snprintf(buf, len, "%u", (unsigned)cfg->var); \ 599 func(buf, arg);} 600/** compare and print yesno option */ 601#define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \ 602 {func(cfg->var?"yes":"no", arg);} 603/** compare and print string option */ 604#define O_STR(opt, str, var) if(strcmp(opt, str)==0) \ 605 {func(cfg->var?cfg->var:"", arg);} 606/** compare and print array option */ 607#define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \ 608 {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);} 609/** compare and print memorysize option */ 610#define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \ 611 if(cfg->var > 1024*1024*1024) { \ 612 size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \ 613 snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \ 614 } else snprintf(buf, len, "%u", (unsigned)cfg->var); \ 615 func(buf, arg);} 616/** compare and print list option */ 617#define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \ 618 struct config_strlist* p = cfg->lst; \ 619 for(p = cfg->lst; p; p = p->next) \ 620 func(p->str, arg); \ 621 } 622/** compare and print list option */ 623#define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \ 624 struct config_str2list* p = cfg->lst; \ 625 for(p = cfg->lst; p; p = p->next) \ 626 snprintf(buf, len, "%s %s\n", p->str, p->str2); \ 627 func(buf, arg); \ 628 } 629 630int 631config_get_option(struct config_file* cfg, const char* opt, 632 void (*func)(char*,void*), void* arg) 633{ 634 char buf[1024]; 635 size_t len = sizeof(buf); 636 fptr_ok(fptr_whitelist_print_func(func)); 637 O_DEC(opt, "verbosity", verbosity) 638 else O_DEC(opt, "statistics-interval", stat_interval) 639 else O_YNO(opt, "statistics-cumulative", stat_cumulative) 640 else O_YNO(opt, "extended-statistics", stat_extended) 641 else O_YNO(opt, "use-syslog", use_syslog) 642 else O_YNO(opt, "log-time-ascii", log_time_ascii) 643 else O_DEC(opt, "num-threads", num_threads) 644 else O_IFC(opt, "interface", num_ifs, ifs) 645 else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs) 646 else O_YNO(opt, "interface-automatic", if_automatic) 647 else O_DEC(opt, "port", port) 648 else O_DEC(opt, "outgoing-range", outgoing_num_ports) 649 else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp) 650 else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp) 651 else O_DEC(opt, "edns-buffer-size", edns_buffer_size) 652 else O_DEC(opt, "msg-buffer-size", msg_buffer_size) 653 else O_MEM(opt, "msg-cache-size", msg_cache_size) 654 else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs) 655 else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread) 656 else O_UNS(opt, "jostle-timeout", jostle_time) 657 else O_MEM(opt, "so-rcvbuf", so_rcvbuf) 658 else O_MEM(opt, "so-sndbuf", so_sndbuf) 659 else O_YNO(opt, "so-reuseport", so_reuseport) 660 else O_YNO(opt, "ip-transparent", ip_transparent) 661 else O_MEM(opt, "rrset-cache-size", rrset_cache_size) 662 else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs) 663 else O_YNO(opt, "prefetch-key", prefetch_key) 664 else O_YNO(opt, "prefetch", prefetch) 665 else O_DEC(opt, "cache-max-ttl", max_ttl) 666 else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl) 667 else O_DEC(opt, "cache-min-ttl", min_ttl) 668 else O_DEC(opt, "infra-host-ttl", host_ttl) 669 else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs) 670 else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt) 671 else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts) 672 else O_UNS(opt, "delay-close", delay_close) 673 else O_YNO(opt, "do-ip4", do_ip4) 674 else O_YNO(opt, "do-ip6", do_ip6) 675 else O_YNO(opt, "do-udp", do_udp) 676 else O_YNO(opt, "do-tcp", do_tcp) 677 else O_YNO(opt, "tcp-upstream", tcp_upstream) 678 else O_YNO(opt, "ssl-upstream", ssl_upstream) 679 else O_STR(opt, "ssl-service-key", ssl_service_key) 680 else O_STR(opt, "ssl-service-pem", ssl_service_pem) 681 else O_DEC(opt, "ssl-port", ssl_port) 682 else O_YNO(opt, "do-daemonize", do_daemonize) 683 else O_STR(opt, "chroot", chrootdir) 684 else O_STR(opt, "username", username) 685 else O_STR(opt, "directory", directory) 686 else O_STR(opt, "logfile", logfile) 687 else O_YNO(opt, "log-queries", log_queries) 688 else O_STR(opt, "pidfile", pidfile) 689 else O_YNO(opt, "hide-identity", hide_identity) 690 else O_YNO(opt, "hide-version", hide_version) 691 else O_STR(opt, "identity", identity) 692 else O_STR(opt, "version", version) 693 else O_STR(opt, "target-fetch-policy", target_fetch_policy) 694 else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize) 695 else O_YNO(opt, "harden-large-queries", harden_large_queries) 696 else O_YNO(opt, "harden-glue", harden_glue) 697 else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped) 698 else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain) 699 else O_YNO(opt, "harden-referral-path", harden_referral_path) 700 else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade) 701 else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id) 702 else O_LST(opt, "caps-whitelist", caps_whitelist) 703 else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold) 704 else O_YNO(opt, "do-not-query-localhost", donotquery_localhost) 705 else O_STR(opt, "module-config", module_conf) 706 else O_STR(opt, "dlv-anchor-file", dlv_anchor_file) 707 else O_DEC(opt, "val-bogus-ttl", bogus_ttl) 708 else O_YNO(opt, "val-clean-additional", val_clean_additional) 709 else O_DEC(opt, "val-log-level", val_log_level) 710 else O_YNO(opt, "val-permissive-mode", val_permissive_mode) 711 else O_YNO(opt, "ignore-cd-flag", ignore_cd) 712 else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations) 713 else O_UNS(opt, "add-holddown", add_holddown) 714 else O_UNS(opt, "del-holddown", del_holddown) 715 else O_UNS(opt, "keep-missing", keep_missing) 716 else O_YNO(opt, "permit-small-holddown", permit_small_holddown) 717 else O_MEM(opt, "key-cache-size", key_cache_size) 718 else O_DEC(opt, "key-cache-slabs", key_cache_slabs) 719 else O_MEM(opt, "neg-cache-size", neg_cache_size) 720 else O_YNO(opt, "control-enable", remote_control_enable) 721 else O_DEC(opt, "control-port", control_port) 722 else O_STR(opt, "server-key-file", server_key_file) 723 else O_STR(opt, "server-cert-file", server_cert_file) 724 else O_STR(opt, "control-key-file", control_key_file) 725 else O_STR(opt, "control-cert-file", control_cert_file) 726 else O_LST(opt, "root-hints", root_hints) 727 else O_LS2(opt, "access-control", acls) 728 else O_LST(opt, "do-not-query-address", donotqueryaddrs) 729 else O_LST(opt, "private-address", private_address) 730 else O_LST(opt, "private-domain", private_domain) 731 else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list) 732 else O_LST(opt, "trust-anchor-file", trust_anchor_file_list) 733 else O_LST(opt, "trust-anchor", trust_anchor_list) 734 else O_LST(opt, "trusted-keys-file", trusted_keys_file_list) 735 else O_LST(opt, "dlv-anchor", dlv_anchor_list) 736 else O_LST(opt, "control-interface", control_ifs) 737 else O_LST(opt, "domain-insecure", domain_insecure) 738 else O_UNS(opt, "val-override-date", val_date_override) 739 else O_YNO(opt, "minimal-responses", minimal_responses) 740 else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin) 741 else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones) 742 else O_DEC(opt, "max-udp-size", max_udp_size) 743 else O_STR(opt, "python-script", python_script) 744 else O_DEC(opt, "ratelimit", ratelimit) 745 else O_MEM(opt, "ratelimit-size", ratelimit_size) 746 else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs) 747 else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain) 748 else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain) 749 else O_DEC(opt, "ratelimit-factor", ratelimit_factor) 750 else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min) 751 else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max) 752 else O_YNO(opt, "qname-minimisation", qname_minimisation) 753 /* not here: 754 * outgoing-permit, outgoing-avoid - have list of ports 755 * local-zone - zones and nodefault variables 756 * local-data - see below 757 * local-data-ptr - converted to local-data entries 758 * stub-zone, name, stub-addr, stub-host, stub-prime 759 * forward-zone, name, forward-addr, forward-host 760 */ 761 else return 0; 762 return 1; 763} 764 765/** initialize the global cfg_parser object */ 766static void 767create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot) 768{ 769 static struct config_parser_state st; 770 cfg_parser = &st; 771 cfg_parser->filename = filename; 772 cfg_parser->line = 1; 773 cfg_parser->errors = 0; 774 cfg_parser->cfg = cfg; 775 cfg_parser->chroot = chroot; 776 init_cfg_parse(); 777} 778 779int 780config_read(struct config_file* cfg, const char* filename, const char* chroot) 781{ 782 FILE *in; 783 char *fname = (char*)filename; 784#ifdef HAVE_GLOB 785 glob_t g; 786 size_t i; 787 int r, flags; 788#endif 789 if(!fname) 790 return 1; 791 792 /* check for wildcards */ 793#ifdef HAVE_GLOB 794 if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') && 795 !strchr(fname, '{') && !strchr(fname, '~'))) { 796 verbose(VERB_QUERY, "wildcard found, processing %s", fname); 797 flags = 0 798#ifdef GLOB_ERR 799 | GLOB_ERR 800#endif 801#ifdef GLOB_NOSORT 802 | GLOB_NOSORT 803#endif 804#ifdef GLOB_BRACE 805 | GLOB_BRACE 806#endif 807#ifdef GLOB_TILDE 808 | GLOB_TILDE 809#endif 810 ; 811 memset(&g, 0, sizeof(g)); 812 r = glob(fname, flags, NULL, &g); 813 if(r) { 814 /* some error */ 815 globfree(&g); 816 if(r == GLOB_NOMATCH) { 817 verbose(VERB_QUERY, "include: " 818 "no matches for %s", fname); 819 return 1; 820 } else if(r == GLOB_NOSPACE) { 821 log_err("include: %s: " 822 "fnametern out of memory", fname); 823 } else if(r == GLOB_ABORTED) { 824 log_err("wildcard include: %s: expansion " 825 "aborted (%s)", fname, strerror(errno)); 826 } else { 827 log_err("wildcard include: %s: expansion " 828 "failed (%s)", fname, strerror(errno)); 829 } 830 /* ignore globs that yield no files */ 831 return 1; 832 } 833 /* process files found, if any */ 834 for(i=0; i<(size_t)g.gl_pathc; i++) { 835 if(!config_read(cfg, g.gl_pathv[i], chroot)) { 836 log_err("error reading wildcard " 837 "include: %s", g.gl_pathv[i]); 838 globfree(&g); 839 return 0; 840 } 841 } 842 globfree(&g); 843 return 1; 844 } 845#endif /* HAVE_GLOB */ 846 847 in = fopen(fname, "r"); 848 if(!in) { 849 log_err("Could not open %s: %s", fname, strerror(errno)); 850 return 0; 851 } 852 create_cfg_parser(cfg, fname, chroot); 853 ub_c_in = in; 854 ub_c_parse(); 855 fclose(in); 856 857 if(cfg_parser->errors != 0) { 858 fprintf(stderr, "read %s failed: %d errors in configuration file\n", 859 fname, cfg_parser->errors); 860 errno=EINVAL; 861 return 0; 862 } 863 864 return 1; 865} 866 867void 868config_delstrlist(struct config_strlist* p) 869{ 870 struct config_strlist *np; 871 while(p) { 872 np = p->next; 873 free(p->str); 874 free(p); 875 p = np; 876 } 877} 878 879void 880config_deldblstrlist(struct config_str2list* p) 881{ 882 struct config_str2list *np; 883 while(p) { 884 np = p->next; 885 free(p->str); 886 free(p->str2); 887 free(p); 888 p = np; 889 } 890} 891 892void 893config_delstubs(struct config_stub* p) 894{ 895 struct config_stub* np; 896 while(p) { 897 np = p->next; 898 free(p->name); 899 config_delstrlist(p->hosts); 900 config_delstrlist(p->addrs); 901 free(p); 902 p = np; 903 } 904} 905 906void 907config_delete(struct config_file* cfg) 908{ 909 if(!cfg) return; 910 free(cfg->username); 911 free(cfg->chrootdir); 912 free(cfg->directory); 913 free(cfg->logfile); 914 free(cfg->pidfile); 915 free(cfg->target_fetch_policy); 916 free(cfg->ssl_service_key); 917 free(cfg->ssl_service_pem); 918 if(cfg->ifs) { 919 int i; 920 for(i=0; i<cfg->num_ifs; i++) 921 free(cfg->ifs[i]); 922 free(cfg->ifs); 923 } 924 if(cfg->out_ifs) { 925 int i; 926 for(i=0; i<cfg->num_out_ifs; i++) 927 free(cfg->out_ifs[i]); 928 free(cfg->out_ifs); 929 } 930 config_delstubs(cfg->stubs); 931 config_delstubs(cfg->forwards); 932 config_delstrlist(cfg->donotqueryaddrs); 933 config_delstrlist(cfg->root_hints); 934 free(cfg->identity); 935 free(cfg->version); 936 free(cfg->module_conf); 937 free(cfg->outgoing_avail_ports); 938 config_delstrlist(cfg->caps_whitelist); 939 config_delstrlist(cfg->private_address); 940 config_delstrlist(cfg->private_domain); 941 config_delstrlist(cfg->auto_trust_anchor_file_list); 942 config_delstrlist(cfg->trust_anchor_file_list); 943 config_delstrlist(cfg->trusted_keys_file_list); 944 config_delstrlist(cfg->trust_anchor_list); 945 config_delstrlist(cfg->domain_insecure); 946 free(cfg->dlv_anchor_file); 947 config_delstrlist(cfg->dlv_anchor_list); 948 config_deldblstrlist(cfg->acls); 949 free(cfg->val_nsec3_key_iterations); 950 config_deldblstrlist(cfg->local_zones); 951 config_delstrlist(cfg->local_zones_nodefault); 952 config_delstrlist(cfg->local_data); 953 config_delstrlist(cfg->control_ifs); 954 free(cfg->server_key_file); 955 free(cfg->server_cert_file); 956 free(cfg->control_key_file); 957 free(cfg->control_cert_file); 958 free(cfg->dns64_prefix); 959 free(cfg->dnstap_socket_path); 960 free(cfg->dnstap_identity); 961 free(cfg->dnstap_version); 962 config_deldblstrlist(cfg->ratelimit_for_domain); 963 config_deldblstrlist(cfg->ratelimit_below_domain); 964 free(cfg); 965} 966 967static void 968init_outgoing_availports(int* a, int num) 969{ 970 /* generated with make iana_update */ 971 const int iana_assigned[] = { 972#include "util/iana_ports.inc" 973 -1 }; /* end marker to put behind trailing comma */ 974 975 int i; 976 /* do not use <1024, that could be trouble with the system, privs */ 977 for(i=1024; i<num; i++) { 978 a[i] = i; 979 } 980 /* create empty spot at 49152 to keep ephemeral ports available 981 * to other programs */ 982 for(i=49152; i<49152+256; i++) 983 a[i] = 0; 984 /* pick out all the IANA assigned ports */ 985 for(i=0; iana_assigned[i]!=-1; i++) { 986 if(iana_assigned[i] < num) 987 a[iana_assigned[i]] = 0; 988 } 989} 990 991int 992cfg_mark_ports(const char* str, int allow, int* avail, int num) 993{ 994 char* mid = strchr(str, '-'); 995 if(!mid) { 996 int port = atoi(str); 997 if(port == 0 && strcmp(str, "0") != 0) { 998 log_err("cannot parse port number '%s'", str); 999 return 0; 1000 } 1001 if(port < num) 1002 avail[port] = (allow?port:0); 1003 } else { 1004 int i, low, high = atoi(mid+1); 1005 char buf[16]; 1006 if(high == 0 && strcmp(mid+1, "0") != 0) { 1007 log_err("cannot parse port number '%s'", mid+1); 1008 return 0; 1009 } 1010 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) { 1011 log_err("cannot parse port number '%s'", str); 1012 return 0; 1013 } 1014 if(mid > str) 1015 memcpy(buf, str, (size_t)(mid-str)); 1016 buf[mid-str] = 0; 1017 low = atoi(buf); 1018 if(low == 0 && strcmp(buf, "0") != 0) { 1019 log_err("cannot parse port number '%s'", buf); 1020 return 0; 1021 } 1022 for(i=low; i<=high; i++) { 1023 if(i < num) 1024 avail[i] = (allow?i:0); 1025 } 1026 return 1; 1027 } 1028 return 1; 1029} 1030 1031int 1032cfg_scan_ports(int* avail, int num) 1033{ 1034 int i; 1035 int count = 0; 1036 for(i=0; i<num; i++) { 1037 if(avail[i]) 1038 count++; 1039 } 1040 return count; 1041} 1042 1043int cfg_condense_ports(struct config_file* cfg, int** avail) 1044{ 1045 int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536); 1046 int i, at = 0; 1047 *avail = NULL; 1048 if(num == 0) 1049 return 0; 1050 *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int)); 1051 if(!*avail) 1052 return 0; 1053 for(i=0; i<65536; i++) { 1054 if(cfg->outgoing_avail_ports[i]) 1055 (*avail)[at++] = cfg->outgoing_avail_ports[i]; 1056 } 1057 log_assert(at == num); 1058 return num; 1059} 1060 1061/** print error with file and line number */ 1062static void ub_c_error_va_list(const char *fmt, va_list args) 1063{ 1064 cfg_parser->errors++; 1065 fprintf(stderr, "%s:%d: error: ", cfg_parser->filename, 1066 cfg_parser->line); 1067 vfprintf(stderr, fmt, args); 1068 fprintf(stderr, "\n"); 1069} 1070 1071/** print error with file and line number */ 1072void ub_c_error_msg(const char* fmt, ...) 1073{ 1074 va_list args; 1075 va_start(args, fmt); 1076 ub_c_error_va_list(fmt, args); 1077 va_end(args); 1078} 1079 1080void ub_c_error(const char *str) 1081{ 1082 cfg_parser->errors++; 1083 fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename, 1084 cfg_parser->line, str); 1085} 1086 1087int ub_c_wrap(void) 1088{ 1089 return 1; 1090} 1091 1092int cfg_strlist_append(struct config_strlist_head* list, char* item) 1093{ 1094 struct config_strlist *s; 1095 if(!item || !list) 1096 return 0; 1097 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 1098 if(!s) 1099 return 0; 1100 s->str = item; 1101 s->next = NULL; 1102 if(list->last) 1103 list->last->next = s; 1104 else 1105 list->first = s; 1106 list->last = s; 1107 return 1; 1108} 1109 1110int 1111cfg_strlist_insert(struct config_strlist** head, char* item) 1112{ 1113 struct config_strlist *s; 1114 if(!item || !head) 1115 return 0; 1116 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist)); 1117 if(!s) 1118 return 0; 1119 s->str = item; 1120 s->next = *head; 1121 *head = s; 1122 return 1; 1123} 1124 1125int 1126cfg_str2list_insert(struct config_str2list** head, char* item, char* i2) 1127{ 1128 struct config_str2list *s; 1129 if(!item || !i2 || !head) 1130 return 0; 1131 s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list)); 1132 if(!s) 1133 return 0; 1134 s->str = item; 1135 s->str2 = i2; 1136 s->next = *head; 1137 *head = s; 1138 return 1; 1139} 1140 1141time_t 1142cfg_convert_timeval(const char* str) 1143{ 1144 time_t t; 1145 struct tm tm; 1146 memset(&tm, 0, sizeof(tm)); 1147 if(strlen(str) < 14) 1148 return 0; 1149 if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon, 1150 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) 1151 return 0; 1152 tm.tm_year -= 1900; 1153 tm.tm_mon--; 1154 /* Check values */ 1155 if (tm.tm_year < 70) return 0; 1156 if (tm.tm_mon < 0 || tm.tm_mon > 11) return 0; 1157 if (tm.tm_mday < 1 || tm.tm_mday > 31) return 0; 1158 if (tm.tm_hour < 0 || tm.tm_hour > 23) return 0; 1159 if (tm.tm_min < 0 || tm.tm_min > 59) return 0; 1160 if (tm.tm_sec < 0 || tm.tm_sec > 59) return 0; 1161 /* call ldns conversion function */ 1162 t = sldns_mktime_from_utc(&tm); 1163 return t; 1164} 1165 1166int 1167cfg_count_numbers(const char* s) 1168{ 1169 /* format ::= (sp num)+ sp */ 1170 /* num ::= [-](0-9)+ */ 1171 /* sp ::= (space|tab)* */ 1172 int num = 0; 1173 while(*s) { 1174 while(*s && isspace((unsigned char)*s)) 1175 s++; 1176 if(!*s) /* end of string */ 1177 break; 1178 if(*s == '-') 1179 s++; 1180 if(!*s) /* only - not allowed */ 1181 return 0; 1182 if(!isdigit((unsigned char)*s)) /* bad character */ 1183 return 0; 1184 while(*s && isdigit((unsigned char)*s)) 1185 s++; 1186 num++; 1187 } 1188 return num; 1189} 1190 1191/** all digit number */ 1192static int isalldigit(const char* str, size_t l) 1193{ 1194 size_t i; 1195 for(i=0; i<l; i++) 1196 if(!isdigit((unsigned char)str[i])) 1197 return 0; 1198 return 1; 1199} 1200 1201int 1202cfg_parse_memsize(const char* str, size_t* res) 1203{ 1204 size_t len; 1205 size_t mult = 1; 1206 if(!str || (len=(size_t)strlen(str)) == 0) { 1207 log_err("not a size: '%s'", str); 1208 return 0; 1209 } 1210 if(isalldigit(str, len)) { 1211 *res = (size_t)atol(str); 1212 return 1; 1213 } 1214 /* check appended num */ 1215 while(len>0 && str[len-1]==' ') 1216 len--; 1217 if(len > 1 && str[len-1] == 'b') 1218 len--; 1219 else if(len > 1 && str[len-1] == 'B') 1220 len--; 1221 1222 if(len > 1 && tolower((unsigned char)str[len-1]) == 'g') 1223 mult = 1024*1024*1024; 1224 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm') 1225 mult = 1024*1024; 1226 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k') 1227 mult = 1024; 1228 else if(len > 0 && isdigit((unsigned char)str[len-1])) 1229 mult = 1; 1230 else { 1231 log_err("unknown size specifier: '%s'", str); 1232 return 0; 1233 } 1234 while(len>1 && str[len-2]==' ') 1235 len--; 1236 1237 if(!isalldigit(str, len-1)) { 1238 log_err("unknown size specifier: '%s'", str); 1239 return 0; 1240 } 1241 *res = ((size_t)atol(str)) * mult; 1242 return 1; 1243} 1244 1245void 1246config_apply(struct config_file* config) 1247{ 1248 MAX_TTL = (time_t)config->max_ttl; 1249 MIN_TTL = (time_t)config->min_ttl; 1250 MAX_NEG_TTL = (time_t)config->max_negative_ttl; 1251 RTT_MIN_TIMEOUT = config->infra_cache_min_rtt; 1252 EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size; 1253 MINIMAL_RESPONSES = config->minimal_responses; 1254 RRSET_ROUNDROBIN = config->rrset_roundrobin; 1255 log_set_time_asc(config->log_time_ascii); 1256 autr_permit_small_holddown = config->permit_small_holddown; 1257} 1258 1259void config_lookup_uid(struct config_file* cfg) 1260{ 1261#ifdef HAVE_GETPWNAM 1262 /* translate username into uid and gid */ 1263 if(cfg->username && cfg->username[0]) { 1264 struct passwd *pwd; 1265 if((pwd = getpwnam(cfg->username)) != NULL) { 1266 cfg_uid = pwd->pw_uid; 1267 cfg_gid = pwd->pw_gid; 1268 } 1269 } 1270#else 1271 (void)cfg; 1272#endif 1273} 1274 1275/** 1276 * Calculate string length of full pathname in original filesys 1277 * @param fname: the path name to convert. 1278 * Must not be null or empty. 1279 * @param cfg: config struct for chroot and chdir (if set). 1280 * @param use_chdir: if false, only chroot is applied. 1281 * @return length of string. 1282 * remember to allocate one more for 0 at end in mallocs. 1283 */ 1284static size_t 1285strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) 1286{ 1287 size_t len = 0; 1288 int slashit = 0; 1289 if(cfg->chrootdir && cfg->chrootdir[0] && 1290 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { 1291 /* already full pathname, return it */ 1292 return strlen(fname); 1293 } 1294 /* chroot */ 1295 if(cfg->chrootdir && cfg->chrootdir[0]) { 1296 /* start with chrootdir */ 1297 len += strlen(cfg->chrootdir); 1298 slashit = 1; 1299 } 1300 /* chdir */ 1301#ifdef UB_ON_WINDOWS 1302 if(fname[0] != 0 && fname[1] == ':') { 1303 /* full path, no chdir */ 1304 } else 1305#endif 1306 if(fname[0] == '/' || !use_chdir) { 1307 /* full path, no chdir */ 1308 } else if(cfg->directory && cfg->directory[0]) { 1309 /* prepend chdir */ 1310 if(slashit && cfg->directory[0] != '/') 1311 len++; 1312 if(cfg->chrootdir && cfg->chrootdir[0] && 1313 strncmp(cfg->chrootdir, cfg->directory, 1314 strlen(cfg->chrootdir)) == 0) 1315 len += strlen(cfg->directory)-strlen(cfg->chrootdir); 1316 else len += strlen(cfg->directory); 1317 slashit = 1; 1318 } 1319 /* fname */ 1320 if(slashit && fname[0] != '/') 1321 len++; 1322 len += strlen(fname); 1323 return len; 1324} 1325 1326char* 1327fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir) 1328{ 1329 size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1; 1330 int slashit = 0; 1331 char* buf = (char*)malloc(len); 1332 if(!buf) 1333 return NULL; 1334 buf[0] = 0; 1335 /* is fname already in chroot ? */ 1336 if(cfg->chrootdir && cfg->chrootdir[0] && 1337 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) { 1338 /* already full pathname, return it */ 1339 (void)strlcpy(buf, fname, len); 1340 buf[len-1] = 0; 1341 return buf; 1342 } 1343 /* chroot */ 1344 if(cfg->chrootdir && cfg->chrootdir[0]) { 1345 /* start with chrootdir */ 1346 (void)strlcpy(buf, cfg->chrootdir, len); 1347 slashit = 1; 1348 } 1349#ifdef UB_ON_WINDOWS 1350 if(fname[0] != 0 && fname[1] == ':') { 1351 /* full path, no chdir */ 1352 } else 1353#endif 1354 /* chdir */ 1355 if(fname[0] == '/' || !use_chdir) { 1356 /* full path, no chdir */ 1357 } else if(cfg->directory && cfg->directory[0]) { 1358 /* prepend chdir */ 1359 if(slashit && cfg->directory[0] != '/') 1360 (void)strlcat(buf, "/", len); 1361 /* is the directory already in the chroot? */ 1362 if(cfg->chrootdir && cfg->chrootdir[0] && 1363 strncmp(cfg->chrootdir, cfg->directory, 1364 strlen(cfg->chrootdir)) == 0) 1365 (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir), 1366 len); 1367 else (void)strlcat(buf, cfg->directory, len); 1368 slashit = 1; 1369 } 1370 /* fname */ 1371 if(slashit && fname[0] != '/') 1372 (void)strlcat(buf, "/", len); 1373 (void)strlcat(buf, fname, len); 1374 buf[len-1] = 0; 1375 return buf; 1376} 1377 1378/** return next space character in string */ 1379static char* next_space_pos(const char* str) 1380{ 1381 char* sp = strchr(str, ' '); 1382 char* tab = strchr(str, '\t'); 1383 if(!tab && !sp) 1384 return NULL; 1385 if(!sp) return tab; 1386 if(!tab) return sp; 1387 return (sp<tab)?sp:tab; 1388} 1389 1390/** return last space character in string */ 1391static char* last_space_pos(const char* str) 1392{ 1393 char* sp = strrchr(str, ' '); 1394 char* tab = strrchr(str, '\t'); 1395 if(!tab && !sp) 1396 return NULL; 1397 if(!sp) return tab; 1398 if(!tab) return sp; 1399 return (sp>tab)?sp:tab; 1400} 1401 1402int 1403cfg_parse_local_zone(struct config_file* cfg, const char* val) 1404{ 1405 const char *type, *name_end, *name; 1406 char buf[256]; 1407 1408 /* parse it as: [zone_name] [between stuff] [zone_type] */ 1409 name = val; 1410 while(*name && isspace((unsigned char)*name)) 1411 name++; 1412 if(!*name) { 1413 log_err("syntax error: too short: %s", val); 1414 return 0; 1415 } 1416 name_end = next_space_pos(name); 1417 if(!name_end || !*name_end) { 1418 log_err("syntax error: expected zone type: %s", val); 1419 return 0; 1420 } 1421 if (name_end - name > 255) { 1422 log_err("syntax error: bad zone name: %s", val); 1423 return 0; 1424 } 1425 (void)strlcpy(buf, name, sizeof(buf)); 1426 buf[name_end-name] = '\0'; 1427 1428 type = last_space_pos(name_end); 1429 while(type && *type && isspace((unsigned char)*type)) 1430 type++; 1431 if(!type || !*type) { 1432 log_err("syntax error: expected zone type: %s", val); 1433 return 0; 1434 } 1435 1436 if(strcmp(type, "nodefault")==0) { 1437 return cfg_strlist_insert(&cfg->local_zones_nodefault, 1438 strdup(name)); 1439 } else { 1440 return cfg_str2list_insert(&cfg->local_zones, strdup(buf), 1441 strdup(type)); 1442 } 1443} 1444 1445char* cfg_ptr_reverse(char* str) 1446{ 1447 char* ip, *ip_end; 1448 char* name; 1449 char* result; 1450 char buf[1024]; 1451 struct sockaddr_storage addr; 1452 socklen_t addrlen; 1453 1454 /* parse it as: [IP] [between stuff] [name] */ 1455 ip = str; 1456 while(*ip && isspace((unsigned char)*ip)) 1457 ip++; 1458 if(!*ip) { 1459 log_err("syntax error: too short: %s", str); 1460 return NULL; 1461 } 1462 ip_end = next_space_pos(ip); 1463 if(!ip_end || !*ip_end) { 1464 log_err("syntax error: expected name: %s", str); 1465 return NULL; 1466 } 1467 1468 name = last_space_pos(ip_end); 1469 if(!name || !*name) { 1470 log_err("syntax error: expected name: %s", str); 1471 return NULL; 1472 } 1473 1474 sscanf(ip, "%100s", buf); 1475 buf[sizeof(buf)-1]=0; 1476 1477 if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) { 1478 log_err("syntax error: cannot parse address: %s", str); 1479 return NULL; 1480 } 1481 1482 /* reverse IPv4: 1483 * ddd.ddd.ddd.ddd.in-addr-arpa. 1484 * IPv6: (h.){32}.ip6.arpa. */ 1485 1486 if(addr_is_ip6(&addr, addrlen)) { 1487 uint8_t ad[16]; 1488 const char* hex = "0123456789abcdef"; 1489 char *p = buf; 1490 int i; 1491 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr, 1492 sizeof(ad)); 1493 for(i=15; i>=0; i--) { 1494 uint8_t b = ad[i]; 1495 *p++ = hex[ (b&0x0f) ]; 1496 *p++ = '.'; 1497 *p++ = hex[ (b&0xf0) >> 4 ]; 1498 *p++ = '.'; 1499 } 1500 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. "); 1501 } else { 1502 uint8_t ad[4]; 1503 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr, 1504 sizeof(ad)); 1505 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ", 1506 (unsigned)ad[3], (unsigned)ad[2], 1507 (unsigned)ad[1], (unsigned)ad[0]); 1508 } 1509 1510 /* printed the reverse address, now the between goop and name on end */ 1511 while(*ip_end && isspace((unsigned char)*ip_end)) 1512 ip_end++; 1513 if(name>ip_end) { 1514 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s", 1515 (int)(name-ip_end), ip_end); 1516 } 1517 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name); 1518 1519 result = strdup(buf); 1520 if(!result) { 1521 log_err("out of memory parsing %s", str); 1522 return NULL; 1523 } 1524 return result; 1525} 1526 1527#ifdef UB_ON_WINDOWS 1528char* 1529w_lookup_reg_str(const char* key, const char* name) 1530{ 1531 HKEY hk = NULL; 1532 DWORD type = 0; 1533 BYTE buf[1024]; 1534 DWORD len = (DWORD)sizeof(buf); 1535 LONG ret; 1536 char* result = NULL; 1537 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk); 1538 if(ret == ERROR_FILE_NOT_FOUND) 1539 return NULL; /* key does not exist */ 1540 else if(ret != ERROR_SUCCESS) { 1541 log_err("RegOpenKeyEx failed"); 1542 return NULL; 1543 } 1544 ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len); 1545 if(RegCloseKey(hk)) 1546 log_err("RegCloseKey"); 1547 if(ret == ERROR_FILE_NOT_FOUND) 1548 return NULL; /* name does not exist */ 1549 else if(ret != ERROR_SUCCESS) { 1550 log_err("RegQueryValueEx failed"); 1551 return NULL; 1552 } 1553 if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) { 1554 buf[sizeof(buf)-1] = 0; 1555 buf[sizeof(buf)-2] = 0; /* for multi_sz */ 1556 result = strdup((char*)buf); 1557 if(!result) log_err("out of memory"); 1558 } 1559 return result; 1560} 1561 1562void w_config_adjust_directory(struct config_file* cfg) 1563{ 1564 if(cfg->directory && cfg->directory[0]) { 1565 TCHAR dirbuf[2*MAX_PATH+4]; 1566 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) { 1567 /* get executable path, and if that contains 1568 * directories, snip off the filename part */ 1569 dirbuf[0] = 0; 1570 if(!GetModuleFileName(NULL, dirbuf, MAX_PATH)) 1571 log_err("could not GetModuleFileName"); 1572 if(strrchr(dirbuf, '\\')) { 1573 (strrchr(dirbuf, '\\'))[0] = 0; 1574 } else log_err("GetModuleFileName had no path"); 1575 if(dirbuf[0]) { 1576 /* adjust directory for later lookups to work*/ 1577 free(cfg->directory); 1578 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1); 1579 } 1580 } 1581 } 1582} 1583#endif /* UB_ON_WINDOWS */ 1584 1585void errinf(struct module_qstate* qstate, const char* str) 1586{ 1587 struct config_strlist* p; 1588 if(qstate->env->cfg->val_log_level < 2 || !str) 1589 return; 1590 p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p)); 1591 if(!p) { 1592 log_err("malloc failure in validator-error-info string"); 1593 return; 1594 } 1595 p->next = NULL; 1596 p->str = regional_strdup(qstate->region, str); 1597 if(!p->str) { 1598 log_err("malloc failure in validator-error-info string"); 1599 return; 1600 } 1601 /* add at end */ 1602 if(qstate->errinf) { 1603 struct config_strlist* q = qstate->errinf; 1604 while(q->next) 1605 q = q->next; 1606 q->next = p; 1607 } else qstate->errinf = p; 1608} 1609 1610void errinf_origin(struct module_qstate* qstate, struct sock_list *origin) 1611{ 1612 struct sock_list* p; 1613 if(qstate->env->cfg->val_log_level < 2) 1614 return; 1615 for(p=origin; p; p=p->next) { 1616 char buf[256]; 1617 if(p == origin) 1618 snprintf(buf, sizeof(buf), "from "); 1619 else snprintf(buf, sizeof(buf), "and "); 1620 if(p->len == 0) 1621 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), 1622 "cache"); 1623 else 1624 addr_to_str(&p->addr, p->len, buf+strlen(buf), 1625 sizeof(buf)-strlen(buf)); 1626 errinf(qstate, buf); 1627 } 1628} 1629 1630char* errinf_to_str(struct module_qstate* qstate) 1631{ 1632 char buf[20480]; 1633 char* p = buf; 1634 size_t left = sizeof(buf); 1635 struct config_strlist* s; 1636 char dname[LDNS_MAX_DOMAINLEN+1]; 1637 char t[16], c[16]; 1638 sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t)); 1639 sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c)); 1640 dname_str(qstate->qinfo.qname, dname); 1641 snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c); 1642 left -= strlen(p); p += strlen(p); 1643 if(!qstate->errinf) 1644 snprintf(p, left, " misc failure"); 1645 else for(s=qstate->errinf; s; s=s->next) { 1646 snprintf(p, left, " %s", s->str); 1647 left -= strlen(p); p += strlen(p); 1648 } 1649 p = strdup(buf); 1650 if(!p) 1651 log_err("malloc failure in errinf_to_str"); 1652 return p; 1653} 1654 1655void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr) 1656{ 1657 char buf[1024]; 1658 char dname[LDNS_MAX_DOMAINLEN+1]; 1659 char t[16], c[16]; 1660 if(qstate->env->cfg->val_log_level < 2 || !rr) 1661 return; 1662 sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t)); 1663 sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c)); 1664 dname_str(rr->rk.dname, dname); 1665 snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c); 1666 errinf(qstate, buf); 1667} 1668 1669void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname) 1670{ 1671 char b[1024]; 1672 char buf[LDNS_MAX_DOMAINLEN+1]; 1673 if(qstate->env->cfg->val_log_level < 2 || !str || !dname) 1674 return; 1675 dname_str(dname, buf); 1676 snprintf(b, sizeof(b), "%s %s", str, buf); 1677 errinf(qstate, b); 1678} 1679