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