2 * util/config_file.c - reads and stores the config file for unbound.
4 * Copyright (c) 2007, NLnet Labs. All rights reserved.
6 * This software is open source.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
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.
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.
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.
39 * This file contains functions for the config file.
49 #include "util/configyyrename.h"
50 #include "util/config_file.h"
51 #include "util/configparser.h"
52 #include "util/net_help.h"
53 #include "util/data/msgparse.h"
54 #include "util/module.h"
55 #include "util/regional.h"
56 #include "util/fptr_wlist.h"
57 #include "util/data/dname.h"
59 #include "services/cache/infra.h"
60 #include "sldns/wire2str.h"
61 #include "sldns/parseutil.h"
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;
76 /** global config during parsing */
77 struct config_parser_state* cfg_parser = 0;
79 /** init ports possible for use */
80 static void init_outgoing_availports(int* array, int num);
85 struct config_file* cfg;
86 cfg = (struct config_file*)calloc(1, sizeof(struct config_file));
89 /* the defaults if no config is present */
91 cfg->stat_interval = 0;
92 cfg->stat_cumulative = 0;
93 cfg->stat_extended = 0;
95 cfg->port = UNBOUND_DNS_PORT;
100 cfg->tcp_upstream = 0;
102 cfg->outgoing_tcp_mss = 0;
103 cfg->ssl_service_key = NULL;
104 cfg->ssl_service_pem = NULL;
106 cfg->ssl_upstream = 0;
108 cfg->log_time_ascii = 0;
109 cfg->log_queries = 0;
111 # ifdef USE_MINI_EVENT
112 /* select max 1024 sockets */
113 cfg->outgoing_num_ports = 960;
114 cfg->num_queries_per_thread = 512;
116 /* libevent can use many sockets */
117 cfg->outgoing_num_ports = 4096;
118 cfg->num_queries_per_thread = 1024;
120 cfg->outgoing_num_tcp = 10;
121 cfg->incoming_num_tcp = 10;
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;
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;
138 cfg->max_ttl = 3600 * 24;
139 cfg->max_negative_ttl = 3600;
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))))
148 init_outgoing_availports(cfg->outgoing_avail_ports, 65536);
149 if(!(cfg->username = strdup(UB_USERNAME))) goto error_exit;
151 if(!(cfg->chrootdir = strdup(CHROOT_DIR))) goto error_exit;
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;
164 cfg->so_reuseport = 0;
165 cfg->ip_transparent = 0;
168 cfg->num_out_ifs = 0;
171 cfg->forwards = NULL;
173 cfg->harden_short_bufsize = 0;
174 cfg->harden_large_queries = 0;
175 cfg->harden_glue = 1;
176 cfg->harden_dnssec_stripped = 1;
177 cfg->harden_below_nxdomain = 0;
178 cfg->harden_referral_path = 0;
179 cfg->harden_algo_downgrade = 0;
180 cfg->use_caps_bits_for_id = 0;
181 cfg->caps_whitelist = NULL;
182 cfg->private_address = NULL;
183 cfg->private_domain = NULL;
184 cfg->unwanted_threshold = 0;
185 cfg->hide_identity = 0;
186 cfg->hide_version = 0;
187 cfg->identity = NULL;
189 cfg->auto_trust_anchor_file_list = NULL;
190 cfg->trust_anchor_file_list = NULL;
191 cfg->trust_anchor_list = NULL;
192 cfg->trusted_keys_file_list = NULL;
193 cfg->dlv_anchor_file = NULL;
194 cfg->dlv_anchor_list = NULL;
195 cfg->domain_insecure = NULL;
196 cfg->val_date_override = 0;
197 cfg->val_sig_skew_min = 3600; /* at least daylight savings trouble */
198 cfg->val_sig_skew_max = 86400; /* at most timezone settings trouble */
199 cfg->val_clean_additional = 1;
200 cfg->val_log_level = 0;
201 cfg->val_log_squelch = 0;
202 cfg->val_permissive_mode = 0;
204 cfg->add_holddown = 30*24*3600;
205 cfg->del_holddown = 30*24*3600;
206 cfg->keep_missing = 366*24*3600; /* one year plus a little leeway */
207 cfg->permit_small_holddown = 0;
208 cfg->key_cache_size = 4 * 1024 * 1024;
209 cfg->key_cache_slabs = 4;
210 cfg->neg_cache_size = 1 * 1024 * 1024;
211 cfg->local_zones = NULL;
212 cfg->local_zones_nodefault = NULL;
213 cfg->local_data = NULL;
214 cfg->unblock_lan_zones = 0;
215 cfg->insecure_lan_zones = 0;
216 cfg->python_script = NULL;
217 cfg->remote_control_enable = 0;
218 cfg->control_ifs = NULL;
219 cfg->control_port = UNBOUND_CONTROL_PORT;
220 cfg->remote_control_use_cert = 1;
221 cfg->minimal_responses = 0;
222 cfg->rrset_roundrobin = 0;
223 cfg->max_udp_size = 4096;
224 if(!(cfg->server_key_file = strdup(RUN_DIR"/unbound_server.key")))
226 if(!(cfg->server_cert_file = strdup(RUN_DIR"/unbound_server.pem")))
228 if(!(cfg->control_key_file = strdup(RUN_DIR"/unbound_control.key")))
230 if(!(cfg->control_cert_file = strdup(RUN_DIR"/unbound_control.pem")))
233 if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
234 if(!(cfg->val_nsec3_key_iterations =
235 strdup("1024 150 2048 500 4096 2500"))) goto error_exit;
236 #if defined(DNSTAP_SOCKET_PATH)
237 if(!(cfg->dnstap_socket_path = strdup(DNSTAP_SOCKET_PATH)))
241 cfg->ratelimit_slabs = 4;
242 cfg->ratelimit_size = 4*1024*1024;
243 cfg->ratelimit_for_domain = NULL;
244 cfg->ratelimit_below_domain = NULL;
245 cfg->ratelimit_factor = 10;
246 cfg->qname_minimisation = 0;
253 struct config_file* config_create_forlib(void)
255 struct config_file* cfg = config_create();
256 if(!cfg) return NULL;
257 /* modifications for library use, less verbose, less memory */
258 free(cfg->chrootdir);
259 cfg->chrootdir = NULL;
261 cfg->outgoing_num_ports = 16; /* in library use, this is 'reasonable'
262 and probably within the ulimit(maxfds) of the user */
263 cfg->outgoing_num_tcp = 2;
264 cfg->msg_cache_size = 1024*1024;
265 cfg->msg_cache_slabs = 1;
266 cfg->rrset_cache_size = 1024*1024;
267 cfg->rrset_cache_slabs = 1;
268 cfg->infra_cache_slabs = 1;
270 cfg->key_cache_size = 1024*1024;
271 cfg->key_cache_slabs = 1;
272 cfg->neg_cache_size = 100 * 1024;
273 cfg->donotquery_localhost = 0; /* allow, so that you can ask a
274 forward nameserver running on localhost */
275 cfg->val_log_level = 2; /* to fill why_bogus with */
276 cfg->val_log_squelch = 1;
280 /** check that the value passed is >= 0 */
281 #define IS_NUMBER_OR_ZERO \
282 if(atoi(val) == 0 && strcmp(val, "0") != 0) return 0
283 /** check that the value passed is > 0 */
284 #define IS_NONZERO_NUMBER \
285 if(atoi(val) == 0) return 0
286 /** check that the value passed is not 0 and a power of 2 */
287 #define IS_POW2_NUMBER \
288 if(atoi(val) == 0 || !is_pow2((size_t)atoi(val))) return 0
289 /** check that the value passed is yes or no */
290 #define IS_YES_OR_NO \
291 if(strcmp(val, "yes") != 0 && strcmp(val, "no") != 0) return 0
292 /** put integer_or_zero into variable */
293 #define S_NUMBER_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
294 { IS_NUMBER_OR_ZERO; cfg->var = atoi(val); }
295 /** put integer_nonzero into variable */
296 #define S_NUMBER_NONZERO(str, var) if(strcmp(opt, str) == 0) \
297 { IS_NONZERO_NUMBER; cfg->var = atoi(val); }
298 /** put integer_or_zero into unsigned */
299 #define S_UNSIGNED_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
300 { IS_NUMBER_OR_ZERO; cfg->var = (unsigned)atoi(val); }
301 /** put integer_or_zero into size_t */
302 #define S_SIZET_OR_ZERO(str, var) if(strcmp(opt, str) == 0) \
303 { IS_NUMBER_OR_ZERO; cfg->var = (size_t)atoi(val); }
304 /** put integer_nonzero into size_t */
305 #define S_SIZET_NONZERO(str, var) if(strcmp(opt, str) == 0) \
306 { IS_NONZERO_NUMBER; cfg->var = (size_t)atoi(val); }
307 /** put yesno into variable */
308 #define S_YNO(str, var) if(strcmp(opt, str) == 0) \
309 { IS_YES_OR_NO; cfg->var = (strcmp(val, "yes") == 0); }
310 /** put memsize into variable */
311 #define S_MEMSIZE(str, var) if(strcmp(opt, str)==0) \
312 { return cfg_parse_memsize(val, &cfg->var); }
313 /** put pow2 number into variable */
314 #define S_POW2(str, var) if(strcmp(opt, str)==0) \
315 { IS_POW2_NUMBER; cfg->var = (size_t)atoi(val); }
316 /** put string into variable */
317 #define S_STR(str, var) if(strcmp(opt, str)==0) \
318 { free(cfg->var); return (cfg->var = strdup(val)) != NULL; }
319 /** put string into strlist */
320 #define S_STRLIST(str, var) if(strcmp(opt, str)==0) \
321 { return cfg_strlist_insert(&cfg->var, strdup(val)); }
323 int config_set_option(struct config_file* cfg, const char* opt,
326 S_NUMBER_OR_ZERO("verbosity:", verbosity)
327 else if(strcmp(opt, "statistics-interval:") == 0) {
328 if(strcmp(val, "0") == 0 || strcmp(val, "") == 0)
329 cfg->stat_interval = 0;
330 else if(atoi(val) == 0)
332 else cfg->stat_interval = atoi(val);
333 } else if(strcmp(opt, "num_threads:") == 0) {
334 /* not supported, library must have 1 thread in bgworker */
336 } else if(strcmp(opt, "outgoing-port-permit:") == 0) {
337 return cfg_mark_ports(val, 1,
338 cfg->outgoing_avail_ports, 65536);
339 } else if(strcmp(opt, "outgoing-port-avoid:") == 0) {
340 return cfg_mark_ports(val, 0,
341 cfg->outgoing_avail_ports, 65536);
342 } else if(strcmp(opt, "local-zone:") == 0) {
343 return cfg_parse_local_zone(cfg, val);
344 } else if(strcmp(opt, "val-override-date:") == 0) {
345 if(strcmp(val, "") == 0 || strcmp(val, "0") == 0) {
346 cfg->val_date_override = 0;
347 } else if(strlen(val) == 14) {
348 cfg->val_date_override = cfg_convert_timeval(val);
349 return cfg->val_date_override != 0;
351 if(atoi(val) == 0) return 0;
352 cfg->val_date_override = (uint32_t)atoi(val);
354 } else if(strcmp(opt, "local-data-ptr:") == 0) {
355 char* ptr = cfg_ptr_reverse((char*)opt);
356 return cfg_strlist_insert(&cfg->local_data, ptr);
357 } else if(strcmp(opt, "logfile:") == 0) {
360 return (cfg->logfile = strdup(val)) != NULL;
362 else if(strcmp(opt, "log-time-ascii:") == 0)
363 { IS_YES_OR_NO; cfg->log_time_ascii = (strcmp(val, "yes") == 0);
364 log_set_time_asc(cfg->log_time_ascii); }
365 else S_SIZET_NONZERO("max-udp-size:", max_udp_size)
366 else S_YNO("use-syslog:", use_syslog)
367 else S_YNO("extended-statistics:", stat_extended)
368 else S_YNO("statistics-cumulative:", stat_cumulative)
369 else S_YNO("do-ip4:", do_ip4)
370 else S_YNO("do-ip6:", do_ip6)
371 else S_YNO("do-udp:", do_udp)
372 else S_YNO("do-tcp:", do_tcp)
373 else S_YNO("tcp-upstream:", tcp_upstream)
374 else S_NUMBER_NONZERO("tcp-mss:", tcp_mss)
375 else S_NUMBER_NONZERO("outgoing-tcp-mss:", outgoing_tcp_mss)
376 else S_YNO("ssl-upstream:", ssl_upstream)
377 else S_STR("ssl-service-key:", ssl_service_key)
378 else S_STR("ssl-service-pem:", ssl_service_pem)
379 else S_NUMBER_NONZERO("ssl-port:", ssl_port)
380 else S_YNO("interface-automatic:", if_automatic)
381 else S_YNO("do-daemonize:", do_daemonize)
382 else S_NUMBER_NONZERO("port:", port)
383 else S_NUMBER_NONZERO("outgoing-range:", outgoing_num_ports)
384 else S_SIZET_OR_ZERO("outgoing-num-tcp:", outgoing_num_tcp)
385 else S_SIZET_OR_ZERO("incoming-num-tcp:", incoming_num_tcp)
386 else S_SIZET_NONZERO("edns-buffer-size:", edns_buffer_size)
387 else S_SIZET_NONZERO("msg-buffer-size:", msg_buffer_size)
388 else S_MEMSIZE("msg-cache-size:", msg_cache_size)
389 else S_POW2("msg-cache-slabs:", msg_cache_slabs)
390 else S_SIZET_NONZERO("num-queries-per-thread:",num_queries_per_thread)
391 else S_SIZET_OR_ZERO("jostle-timeout:", jostle_time)
392 else S_MEMSIZE("so-rcvbuf:", so_rcvbuf)
393 else S_MEMSIZE("so-sndbuf:", so_sndbuf)
394 else S_YNO("so-reuseport:", so_reuseport)
395 else S_YNO("ip-transparent:", ip_transparent)
396 else S_MEMSIZE("rrset-cache-size:", rrset_cache_size)
397 else S_POW2("rrset-cache-slabs:", rrset_cache_slabs)
398 else S_YNO("prefetch:", prefetch)
399 else S_YNO("prefetch-key:", prefetch_key)
400 else if(strcmp(opt, "cache-max-ttl:") == 0)
401 { IS_NUMBER_OR_ZERO; cfg->max_ttl = atoi(val); MAX_TTL=(time_t)cfg->max_ttl;}
402 else if(strcmp(opt, "cache-max-negative-ttl:") == 0)
403 { IS_NUMBER_OR_ZERO; cfg->max_negative_ttl = atoi(val); MAX_NEG_TTL=(time_t)cfg->max_negative_ttl;}
404 else if(strcmp(opt, "cache-min-ttl:") == 0)
405 { IS_NUMBER_OR_ZERO; cfg->min_ttl = atoi(val); MIN_TTL=(time_t)cfg->min_ttl;}
406 else if(strcmp(opt, "infra-cache-min-rtt:") == 0) {
407 IS_NUMBER_OR_ZERO; cfg->infra_cache_min_rtt = atoi(val);
408 RTT_MIN_TIMEOUT=cfg->infra_cache_min_rtt;
410 else S_NUMBER_OR_ZERO("infra-host-ttl:", host_ttl)
411 else S_POW2("infra-cache-slabs:", infra_cache_slabs)
412 else S_SIZET_NONZERO("infra-cache-numhosts:", infra_cache_numhosts)
413 else S_NUMBER_OR_ZERO("delay-close:", delay_close)
414 else S_STR("chroot:", chrootdir)
415 else S_STR("username:", username)
416 else S_STR("directory:", directory)
417 else S_STR("pidfile:", pidfile)
418 else S_YNO("hide-identity:", hide_identity)
419 else S_YNO("hide-version:", hide_version)
420 else S_STR("identity:", identity)
421 else S_STR("version:", version)
422 else S_STRLIST("root-hints:", root_hints)
423 else S_STR("target-fetch-policy:", target_fetch_policy)
424 else S_YNO("harden-glue:", harden_glue)
425 else S_YNO("harden-short-bufsize:", harden_short_bufsize)
426 else S_YNO("harden-large-queries:", harden_large_queries)
427 else S_YNO("harden-dnssec-stripped:", harden_dnssec_stripped)
428 else S_YNO("harden-below-nxdomain:", harden_below_nxdomain)
429 else S_YNO("harden-referral-path:", harden_referral_path)
430 else S_YNO("harden-algo-downgrade:", harden_algo_downgrade)
431 else S_YNO("use-caps-for-id", use_caps_bits_for_id)
432 else S_STRLIST("caps-whitelist:", caps_whitelist)
433 else S_SIZET_OR_ZERO("unwanted-reply-threshold:", unwanted_threshold)
434 else S_STRLIST("private-address:", private_address)
435 else S_STRLIST("private-domain:", private_domain)
436 else S_YNO("do-not-query-localhost:", donotquery_localhost)
437 else S_STRLIST("do-not-query-address:", donotqueryaddrs)
438 else S_STRLIST("auto-trust-anchor-file:", auto_trust_anchor_file_list)
439 else S_STRLIST("trust-anchor-file:", trust_anchor_file_list)
440 else S_STRLIST("trust-anchor:", trust_anchor_list)
441 else S_STRLIST("trusted-keys-file:", trusted_keys_file_list)
442 else S_STR("dlv-anchor-file:", dlv_anchor_file)
443 else S_STRLIST("dlv-anchor:", dlv_anchor_list)
444 else S_STRLIST("domain-insecure:", domain_insecure)
445 else S_NUMBER_OR_ZERO("val-bogus-ttl:", bogus_ttl)
446 else S_YNO("val-clean-additional:", val_clean_additional)
447 else S_NUMBER_OR_ZERO("val-log-level:", val_log_level)
448 else S_YNO("val-log-squelch:", val_log_squelch)
449 else S_YNO("log-queries:", log_queries)
450 else S_YNO("val-permissive-mode:", val_permissive_mode)
451 else S_YNO("ignore-cd-flag:", ignore_cd)
452 else S_STR("val-nsec3-keysize-iterations:", val_nsec3_key_iterations)
453 else S_UNSIGNED_OR_ZERO("add-holddown:", add_holddown)
454 else S_UNSIGNED_OR_ZERO("del-holddown:", del_holddown)
455 else S_UNSIGNED_OR_ZERO("keep-missing:", keep_missing)
456 else if(strcmp(opt, "permit-small-holddown:") == 0)
457 { IS_YES_OR_NO; cfg->permit_small_holddown = (strcmp(val, "yes") == 0);
458 autr_permit_small_holddown = cfg->permit_small_holddown; }
459 else S_MEMSIZE("key-cache-size:", key_cache_size)
460 else S_POW2("key-cache-slabs:", key_cache_slabs)
461 else S_MEMSIZE("neg-cache-size:", neg_cache_size)
462 else S_YNO("minimal-responses:", minimal_responses)
463 else S_YNO("rrset-roundrobin:", rrset_roundrobin)
464 else S_STRLIST("local-data:", local_data)
465 else S_YNO("unblock-lan-zones:", unblock_lan_zones)
466 else S_YNO("insecure-lan-zones:", insecure_lan_zones)
467 else S_YNO("control-enable:", remote_control_enable)
468 else S_STRLIST("control-interface:", control_ifs)
469 else S_NUMBER_NONZERO("control-port:", control_port)
470 else S_STR("server-key-file:", server_key_file)
471 else S_STR("server-cert-file:", server_cert_file)
472 else S_STR("control-key-file:", control_key_file)
473 else S_STR("control-cert-file:", control_cert_file)
474 else S_STR("module-config:", module_conf)
475 else S_STR("python-script:", python_script)
476 else if(strcmp(opt, "ratelimit:") == 0) {
477 IS_NUMBER_OR_ZERO; cfg->ratelimit = atoi(val);
478 infra_dp_ratelimit=cfg->ratelimit;
480 else S_MEMSIZE("ratelimit-size:", ratelimit_size)
481 else S_POW2("ratelimit-slabs:", ratelimit_slabs)
482 else S_NUMBER_OR_ZERO("ratelimit-factor:", ratelimit_factor)
483 else S_YNO("qname-minimisation:", qname_minimisation)
484 /* val_sig_skew_min and max are copied into val_env during init,
485 * so this does not update val_env with set_option */
486 else if(strcmp(opt, "val-sig-skew-min:") == 0)
487 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_min = (int32_t)atoi(val); }
488 else if(strcmp(opt, "val-sig-skew-max:") == 0)
489 { IS_NUMBER_OR_ZERO; cfg->val_sig_skew_max = (int32_t)atoi(val); }
490 else if (strcmp(opt, "outgoing-interface:") == 0) {
491 char* d = strdup(val);
493 (char**)reallocarray(NULL, (size_t)cfg->num_out_ifs+1, sizeof(char*));
494 if(!d || !oi) { free(d); free(oi); return -1; }
495 if(cfg->out_ifs && cfg->num_out_ifs) {
496 memmove(oi, cfg->out_ifs, cfg->num_out_ifs*sizeof(char*));
499 oi[cfg->num_out_ifs++] = d;
502 /* unknown or unsupported (from the set_option interface):
503 * interface, outgoing-interface, access-control,
504 * stub-zone, name, stub-addr, stub-host, stub-prime
505 * forward-first, stub-first,
506 * forward-zone, name, forward-addr, forward-host,
507 * ratelimit-for-domain, ratelimit-below-domain */
513 void config_print_func(char* line, void* arg)
515 FILE* f = (FILE*)arg;
516 (void)fprintf(f, "%s\n", line);
519 /** collate func arg */
520 struct config_collate_arg {
521 /** list of result items */
522 struct config_strlist_head list;
523 /** if a malloc error occurred, 0 is OK */
527 void config_collate_func(char* line, void* arg)
529 struct config_collate_arg* m = (struct config_collate_arg*)arg;
532 if(!cfg_strlist_append(&m->list, strdup(line)))
536 int config_get_option_list(struct config_file* cfg, const char* opt,
537 struct config_strlist** list)
539 struct config_collate_arg m;
540 memset(&m, 0, sizeof(m));
542 if(!config_get_option(cfg, opt, config_collate_func, &m))
545 config_delstrlist(m.list.first);
548 *list = m.list.first;
553 config_get_option_collate(struct config_file* cfg, const char* opt, char** str)
555 struct config_strlist* list = NULL;
558 if((r = config_get_option_list(cfg, opt, &list)) != 0)
560 *str = config_collate_cat(list);
561 config_delstrlist(list);
567 config_collate_cat(struct config_strlist* list)
569 size_t total = 0, left;
570 struct config_strlist* s;
572 if(!list) /* no elements */
574 if(list->next == NULL) /* one element , no newline at end. */
575 return strdup(list->str);
576 /* count total length */
577 for(s=list; s; s=s->next)
578 total += strlen(s->str) + 1; /* len + newline */
579 left = total+1; /* one extra for nul at end */
584 for(s=list; s; s=s->next) {
585 size_t this = strlen(s->str);
586 if(this+2 > left) { /* sanity check */
590 snprintf(w, left, "%s\n", s->str);
598 /** compare and print decimal option */
599 #define O_DEC(opt, str, var) if(strcmp(opt, str)==0) \
600 {snprintf(buf, len, "%d", (int)cfg->var); \
602 /** compare and print unsigned option */
603 #define O_UNS(opt, str, var) if(strcmp(opt, str)==0) \
604 {snprintf(buf, len, "%u", (unsigned)cfg->var); \
606 /** compare and print yesno option */
607 #define O_YNO(opt, str, var) if(strcmp(opt, str)==0) \
608 {func(cfg->var?"yes":"no", arg);}
609 /** compare and print string option */
610 #define O_STR(opt, str, var) if(strcmp(opt, str)==0) \
611 {func(cfg->var?cfg->var:"", arg);}
612 /** compare and print array option */
613 #define O_IFC(opt, str, num, arr) if(strcmp(opt, str)==0) \
614 {int i; for(i=0; i<cfg->num; i++) func(cfg->arr[i], arg);}
615 /** compare and print memorysize option */
616 #define O_MEM(opt, str, var) if(strcmp(opt, str)==0) { \
617 if(cfg->var > 1024*1024*1024) { \
618 size_t f=cfg->var/(size_t)1000000, b=cfg->var%(size_t)1000000; \
619 snprintf(buf, len, "%u%6.6u", (unsigned)f, (unsigned)b); \
620 } else snprintf(buf, len, "%u", (unsigned)cfg->var); \
622 /** compare and print list option */
623 #define O_LST(opt, name, lst) if(strcmp(opt, name)==0) { \
624 struct config_strlist* p = cfg->lst; \
625 for(p = cfg->lst; p; p = p->next) \
628 /** compare and print list option */
629 #define O_LS2(opt, name, lst) if(strcmp(opt, name)==0) { \
630 struct config_str2list* p = cfg->lst; \
631 for(p = cfg->lst; p; p = p->next) \
632 snprintf(buf, len, "%s %s\n", p->str, p->str2); \
637 config_get_option(struct config_file* cfg, const char* opt,
638 void (*func)(char*,void*), void* arg)
641 size_t len = sizeof(buf);
642 fptr_ok(fptr_whitelist_print_func(func));
643 O_DEC(opt, "verbosity", verbosity)
644 else O_DEC(opt, "statistics-interval", stat_interval)
645 else O_YNO(opt, "statistics-cumulative", stat_cumulative)
646 else O_YNO(opt, "extended-statistics", stat_extended)
647 else O_YNO(opt, "use-syslog", use_syslog)
648 else O_YNO(opt, "log-time-ascii", log_time_ascii)
649 else O_DEC(opt, "num-threads", num_threads)
650 else O_IFC(opt, "interface", num_ifs, ifs)
651 else O_IFC(opt, "outgoing-interface", num_out_ifs, out_ifs)
652 else O_YNO(opt, "interface-automatic", if_automatic)
653 else O_DEC(opt, "port", port)
654 else O_DEC(opt, "outgoing-range", outgoing_num_ports)
655 else O_DEC(opt, "outgoing-num-tcp", outgoing_num_tcp)
656 else O_DEC(opt, "incoming-num-tcp", incoming_num_tcp)
657 else O_DEC(opt, "edns-buffer-size", edns_buffer_size)
658 else O_DEC(opt, "msg-buffer-size", msg_buffer_size)
659 else O_MEM(opt, "msg-cache-size", msg_cache_size)
660 else O_DEC(opt, "msg-cache-slabs", msg_cache_slabs)
661 else O_DEC(opt, "num-queries-per-thread", num_queries_per_thread)
662 else O_UNS(opt, "jostle-timeout", jostle_time)
663 else O_MEM(opt, "so-rcvbuf", so_rcvbuf)
664 else O_MEM(opt, "so-sndbuf", so_sndbuf)
665 else O_YNO(opt, "so-reuseport", so_reuseport)
666 else O_YNO(opt, "ip-transparent", ip_transparent)
667 else O_MEM(opt, "rrset-cache-size", rrset_cache_size)
668 else O_DEC(opt, "rrset-cache-slabs", rrset_cache_slabs)
669 else O_YNO(opt, "prefetch-key", prefetch_key)
670 else O_YNO(opt, "prefetch", prefetch)
671 else O_DEC(opt, "cache-max-ttl", max_ttl)
672 else O_DEC(opt, "cache-max-negative-ttl", max_negative_ttl)
673 else O_DEC(opt, "cache-min-ttl", min_ttl)
674 else O_DEC(opt, "infra-host-ttl", host_ttl)
675 else O_DEC(opt, "infra-cache-slabs", infra_cache_slabs)
676 else O_DEC(opt, "infra-cache-min-rtt", infra_cache_min_rtt)
677 else O_MEM(opt, "infra-cache-numhosts", infra_cache_numhosts)
678 else O_UNS(opt, "delay-close", delay_close)
679 else O_YNO(opt, "do-ip4", do_ip4)
680 else O_YNO(opt, "do-ip6", do_ip6)
681 else O_YNO(opt, "do-udp", do_udp)
682 else O_YNO(opt, "do-tcp", do_tcp)
683 else O_YNO(opt, "tcp-upstream", tcp_upstream)
684 else O_DEC(opt, "tcp-mss", tcp_mss)
685 else O_DEC(opt, "outgoing-tcp-mss", outgoing_tcp_mss)
686 else O_YNO(opt, "ssl-upstream", ssl_upstream)
687 else O_STR(opt, "ssl-service-key", ssl_service_key)
688 else O_STR(opt, "ssl-service-pem", ssl_service_pem)
689 else O_DEC(opt, "ssl-port", ssl_port)
690 else O_YNO(opt, "do-daemonize", do_daemonize)
691 else O_STR(opt, "chroot", chrootdir)
692 else O_STR(opt, "username", username)
693 else O_STR(opt, "directory", directory)
694 else O_STR(opt, "logfile", logfile)
695 else O_YNO(opt, "log-queries", log_queries)
696 else O_STR(opt, "pidfile", pidfile)
697 else O_YNO(opt, "hide-identity", hide_identity)
698 else O_YNO(opt, "hide-version", hide_version)
699 else O_STR(opt, "identity", identity)
700 else O_STR(opt, "version", version)
701 else O_STR(opt, "target-fetch-policy", target_fetch_policy)
702 else O_YNO(opt, "harden-short-bufsize", harden_short_bufsize)
703 else O_YNO(opt, "harden-large-queries", harden_large_queries)
704 else O_YNO(opt, "harden-glue", harden_glue)
705 else O_YNO(opt, "harden-dnssec-stripped", harden_dnssec_stripped)
706 else O_YNO(opt, "harden-below-nxdomain", harden_below_nxdomain)
707 else O_YNO(opt, "harden-referral-path", harden_referral_path)
708 else O_YNO(opt, "harden-algo-downgrade", harden_algo_downgrade)
709 else O_YNO(opt, "use-caps-for-id", use_caps_bits_for_id)
710 else O_LST(opt, "caps-whitelist", caps_whitelist)
711 else O_DEC(opt, "unwanted-reply-threshold", unwanted_threshold)
712 else O_YNO(opt, "do-not-query-localhost", donotquery_localhost)
713 else O_STR(opt, "module-config", module_conf)
714 else O_STR(opt, "dlv-anchor-file", dlv_anchor_file)
715 else O_DEC(opt, "val-bogus-ttl", bogus_ttl)
716 else O_YNO(opt, "val-clean-additional", val_clean_additional)
717 else O_DEC(opt, "val-log-level", val_log_level)
718 else O_YNO(opt, "val-permissive-mode", val_permissive_mode)
719 else O_YNO(opt, "ignore-cd-flag", ignore_cd)
720 else O_STR(opt, "val-nsec3-keysize-iterations",val_nsec3_key_iterations)
721 else O_UNS(opt, "add-holddown", add_holddown)
722 else O_UNS(opt, "del-holddown", del_holddown)
723 else O_UNS(opt, "keep-missing", keep_missing)
724 else O_YNO(opt, "permit-small-holddown", permit_small_holddown)
725 else O_MEM(opt, "key-cache-size", key_cache_size)
726 else O_DEC(opt, "key-cache-slabs", key_cache_slabs)
727 else O_MEM(opt, "neg-cache-size", neg_cache_size)
728 else O_YNO(opt, "control-enable", remote_control_enable)
729 else O_DEC(opt, "control-port", control_port)
730 else O_STR(opt, "server-key-file", server_key_file)
731 else O_STR(opt, "server-cert-file", server_cert_file)
732 else O_STR(opt, "control-key-file", control_key_file)
733 else O_STR(opt, "control-cert-file", control_cert_file)
734 else O_LST(opt, "root-hints", root_hints)
735 else O_LS2(opt, "access-control", acls)
736 else O_LST(opt, "do-not-query-address", donotqueryaddrs)
737 else O_LST(opt, "private-address", private_address)
738 else O_LST(opt, "private-domain", private_domain)
739 else O_LST(opt, "auto-trust-anchor-file", auto_trust_anchor_file_list)
740 else O_LST(opt, "trust-anchor-file", trust_anchor_file_list)
741 else O_LST(opt, "trust-anchor", trust_anchor_list)
742 else O_LST(opt, "trusted-keys-file", trusted_keys_file_list)
743 else O_LST(opt, "dlv-anchor", dlv_anchor_list)
744 else O_LST(opt, "control-interface", control_ifs)
745 else O_LST(opt, "domain-insecure", domain_insecure)
746 else O_UNS(opt, "val-override-date", val_date_override)
747 else O_YNO(opt, "minimal-responses", minimal_responses)
748 else O_YNO(opt, "rrset-roundrobin", rrset_roundrobin)
749 else O_YNO(opt, "unblock-lan-zones", unblock_lan_zones)
750 else O_YNO(opt, "insecure-lan-zones", insecure_lan_zones)
751 else O_DEC(opt, "max-udp-size", max_udp_size)
752 else O_STR(opt, "python-script", python_script)
753 else O_DEC(opt, "ratelimit", ratelimit)
754 else O_MEM(opt, "ratelimit-size", ratelimit_size)
755 else O_DEC(opt, "ratelimit-slabs", ratelimit_slabs)
756 else O_LS2(opt, "ratelimit-for-domain", ratelimit_for_domain)
757 else O_LS2(opt, "ratelimit-below-domain", ratelimit_below_domain)
758 else O_DEC(opt, "ratelimit-factor", ratelimit_factor)
759 else O_DEC(opt, "val-sig-skew-min", val_sig_skew_min)
760 else O_DEC(opt, "val-sig-skew-max", val_sig_skew_max)
761 else O_YNO(opt, "qname-minimisation", qname_minimisation)
763 * outgoing-permit, outgoing-avoid - have list of ports
764 * local-zone - zones and nodefault variables
765 * local-data - see below
766 * local-data-ptr - converted to local-data entries
767 * stub-zone, name, stub-addr, stub-host, stub-prime
768 * forward-zone, name, forward-addr, forward-host
774 /** initialize the global cfg_parser object */
776 create_cfg_parser(struct config_file* cfg, char* filename, const char* chroot)
778 static struct config_parser_state st;
780 cfg_parser->filename = filename;
781 cfg_parser->line = 1;
782 cfg_parser->errors = 0;
783 cfg_parser->cfg = cfg;
784 cfg_parser->chroot = chroot;
789 config_read(struct config_file* cfg, const char* filename, const char* chroot)
792 char *fname = (char*)filename;
801 /* check for wildcards */
803 if(!(!strchr(fname, '*') && !strchr(fname, '?') && !strchr(fname, '[') &&
804 !strchr(fname, '{') && !strchr(fname, '~'))) {
805 verbose(VERB_QUERY, "wildcard found, processing %s", fname);
820 memset(&g, 0, sizeof(g));
821 r = glob(fname, flags, NULL, &g);
825 if(r == GLOB_NOMATCH) {
826 verbose(VERB_QUERY, "include: "
827 "no matches for %s", fname);
829 } else if(r == GLOB_NOSPACE) {
830 log_err("include: %s: "
831 "fnametern out of memory", fname);
832 } else if(r == GLOB_ABORTED) {
833 log_err("wildcard include: %s: expansion "
834 "aborted (%s)", fname, strerror(errno));
836 log_err("wildcard include: %s: expansion "
837 "failed (%s)", fname, strerror(errno));
839 /* ignore globs that yield no files */
842 /* process files found, if any */
843 for(i=0; i<(size_t)g.gl_pathc; i++) {
844 if(!config_read(cfg, g.gl_pathv[i], chroot)) {
845 log_err("error reading wildcard "
846 "include: %s", g.gl_pathv[i]);
854 #endif /* HAVE_GLOB */
856 in = fopen(fname, "r");
858 log_err("Could not open %s: %s", fname, strerror(errno));
861 create_cfg_parser(cfg, fname, chroot);
866 if(cfg_parser->errors != 0) {
867 fprintf(stderr, "read %s failed: %d errors in configuration file\n",
868 fname, cfg_parser->errors);
876 struct config_stub* cfg_stub_find(struct config_stub*** pp, const char* nm)
878 struct config_stub* p = *(*pp);
880 if(strcmp(p->name, nm) == 0)
889 config_delstrlist(struct config_strlist* p)
891 struct config_strlist *np;
901 config_deldblstrlist(struct config_str2list* p)
903 struct config_str2list *np;
914 config_delstub(struct config_stub* p)
918 config_delstrlist(p->hosts);
919 config_delstrlist(p->addrs);
924 config_delstubs(struct config_stub* p)
926 struct config_stub* np;
935 config_delete(struct config_file* cfg)
939 free(cfg->chrootdir);
940 free(cfg->directory);
943 free(cfg->target_fetch_policy);
944 free(cfg->ssl_service_key);
945 free(cfg->ssl_service_pem);
948 for(i=0; i<cfg->num_ifs; i++)
954 for(i=0; i<cfg->num_out_ifs; i++)
955 free(cfg->out_ifs[i]);
958 config_delstubs(cfg->stubs);
959 config_delstubs(cfg->forwards);
960 config_delstrlist(cfg->donotqueryaddrs);
961 config_delstrlist(cfg->root_hints);
964 free(cfg->module_conf);
965 free(cfg->outgoing_avail_ports);
966 config_delstrlist(cfg->caps_whitelist);
967 config_delstrlist(cfg->private_address);
968 config_delstrlist(cfg->private_domain);
969 config_delstrlist(cfg->auto_trust_anchor_file_list);
970 config_delstrlist(cfg->trust_anchor_file_list);
971 config_delstrlist(cfg->trusted_keys_file_list);
972 config_delstrlist(cfg->trust_anchor_list);
973 config_delstrlist(cfg->domain_insecure);
974 free(cfg->dlv_anchor_file);
975 config_delstrlist(cfg->dlv_anchor_list);
976 config_deldblstrlist(cfg->acls);
977 free(cfg->val_nsec3_key_iterations);
978 config_deldblstrlist(cfg->local_zones);
979 config_delstrlist(cfg->local_zones_nodefault);
980 config_delstrlist(cfg->local_data);
981 config_delstrlist(cfg->control_ifs);
982 free(cfg->server_key_file);
983 free(cfg->server_cert_file);
984 free(cfg->control_key_file);
985 free(cfg->control_cert_file);
986 free(cfg->dns64_prefix);
987 free(cfg->dnstap_socket_path);
988 free(cfg->dnstap_identity);
989 free(cfg->dnstap_version);
990 config_deldblstrlist(cfg->ratelimit_for_domain);
991 config_deldblstrlist(cfg->ratelimit_below_domain);
996 init_outgoing_availports(int* a, int num)
998 /* generated with make iana_update */
999 const int iana_assigned[] = {
1000 #include "util/iana_ports.inc"
1001 -1 }; /* end marker to put behind trailing comma */
1004 /* do not use <1024, that could be trouble with the system, privs */
1005 for(i=1024; i<num; i++) {
1008 /* create empty spot at 49152 to keep ephemeral ports available
1009 * to other programs */
1010 for(i=49152; i<49152+256; i++)
1012 /* pick out all the IANA assigned ports */
1013 for(i=0; iana_assigned[i]!=-1; i++) {
1014 if(iana_assigned[i] < num)
1015 a[iana_assigned[i]] = 0;
1020 cfg_mark_ports(const char* str, int allow, int* avail, int num)
1022 char* mid = strchr(str, '-');
1024 int port = atoi(str);
1025 if(port == 0 && strcmp(str, "0") != 0) {
1026 log_err("cannot parse port number '%s'", str);
1030 avail[port] = (allow?port:0);
1032 int i, low, high = atoi(mid+1);
1034 if(high == 0 && strcmp(mid+1, "0") != 0) {
1035 log_err("cannot parse port number '%s'", mid+1);
1038 if( (int)(mid-str)+1 >= (int)sizeof(buf) ) {
1039 log_err("cannot parse port number '%s'", str);
1043 memcpy(buf, str, (size_t)(mid-str));
1046 if(low == 0 && strcmp(buf, "0") != 0) {
1047 log_err("cannot parse port number '%s'", buf);
1050 for(i=low; i<=high; i++) {
1052 avail[i] = (allow?i:0);
1060 cfg_scan_ports(int* avail, int num)
1064 for(i=0; i<num; i++) {
1071 int cfg_condense_ports(struct config_file* cfg, int** avail)
1073 int num = cfg_scan_ports(cfg->outgoing_avail_ports, 65536);
1078 *avail = (int*)reallocarray(NULL, (size_t)num, sizeof(int));
1081 for(i=0; i<65536; i++) {
1082 if(cfg->outgoing_avail_ports[i])
1083 (*avail)[at++] = cfg->outgoing_avail_ports[i];
1085 log_assert(at == num);
1089 /** print error with file and line number */
1090 static void ub_c_error_va_list(const char *fmt, va_list args)
1092 cfg_parser->errors++;
1093 fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
1095 vfprintf(stderr, fmt, args);
1096 fprintf(stderr, "\n");
1099 /** print error with file and line number */
1100 void ub_c_error_msg(const char* fmt, ...)
1103 va_start(args, fmt);
1104 ub_c_error_va_list(fmt, args);
1108 void ub_c_error(const char *str)
1110 cfg_parser->errors++;
1111 fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
1112 cfg_parser->line, str);
1120 int cfg_strlist_append(struct config_strlist_head* list, char* item)
1122 struct config_strlist *s;
1125 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1131 list->last->next = s;
1139 cfg_strlist_insert(struct config_strlist** head, char* item)
1141 struct config_strlist *s;
1144 s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
1154 cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
1156 struct config_str2list *s;
1157 if(!item || !i2 || !head)
1159 s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
1170 cfg_convert_timeval(const char* str)
1174 memset(&tm, 0, sizeof(tm));
1175 if(strlen(str) < 14)
1177 if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
1178 &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
1183 if (tm.tm_year < 70) return 0;
1184 if (tm.tm_mon < 0 || tm.tm_mon > 11) return 0;
1185 if (tm.tm_mday < 1 || tm.tm_mday > 31) return 0;
1186 if (tm.tm_hour < 0 || tm.tm_hour > 23) return 0;
1187 if (tm.tm_min < 0 || tm.tm_min > 59) return 0;
1188 if (tm.tm_sec < 0 || tm.tm_sec > 59) return 0;
1189 /* call ldns conversion function */
1190 t = sldns_mktime_from_utc(&tm);
1195 cfg_count_numbers(const char* s)
1197 /* format ::= (sp num)+ sp */
1198 /* num ::= [-](0-9)+ */
1199 /* sp ::= (space|tab)* */
1202 while(*s && isspace((unsigned char)*s))
1204 if(!*s) /* end of string */
1208 if(!*s) /* only - not allowed */
1210 if(!isdigit((unsigned char)*s)) /* bad character */
1212 while(*s && isdigit((unsigned char)*s))
1219 /** all digit number */
1220 static int isalldigit(const char* str, size_t l)
1224 if(!isdigit((unsigned char)str[i]))
1230 cfg_parse_memsize(const char* str, size_t* res)
1234 if(!str || (len=(size_t)strlen(str)) == 0) {
1235 log_err("not a size: '%s'", str);
1238 if(isalldigit(str, len)) {
1239 *res = (size_t)atol(str);
1242 /* check appended num */
1243 while(len>0 && str[len-1]==' ')
1245 if(len > 1 && str[len-1] == 'b')
1247 else if(len > 1 && str[len-1] == 'B')
1250 if(len > 1 && tolower((unsigned char)str[len-1]) == 'g')
1251 mult = 1024*1024*1024;
1252 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'm')
1254 else if(len > 1 && tolower((unsigned char)str[len-1]) == 'k')
1256 else if(len > 0 && isdigit((unsigned char)str[len-1]))
1259 log_err("unknown size specifier: '%s'", str);
1262 while(len>1 && str[len-2]==' ')
1265 if(!isalldigit(str, len-1)) {
1266 log_err("unknown size specifier: '%s'", str);
1269 *res = ((size_t)atol(str)) * mult;
1274 config_apply(struct config_file* config)
1276 MAX_TTL = (time_t)config->max_ttl;
1277 MIN_TTL = (time_t)config->min_ttl;
1278 MAX_NEG_TTL = (time_t)config->max_negative_ttl;
1279 RTT_MIN_TIMEOUT = config->infra_cache_min_rtt;
1280 EDNS_ADVERTISED_SIZE = (uint16_t)config->edns_buffer_size;
1281 MINIMAL_RESPONSES = config->minimal_responses;
1282 RRSET_ROUNDROBIN = config->rrset_roundrobin;
1283 log_set_time_asc(config->log_time_ascii);
1284 autr_permit_small_holddown = config->permit_small_holddown;
1287 void config_lookup_uid(struct config_file* cfg)
1289 #ifdef HAVE_GETPWNAM
1290 /* translate username into uid and gid */
1291 if(cfg->username && cfg->username[0]) {
1293 if((pwd = getpwnam(cfg->username)) != NULL) {
1294 cfg_uid = pwd->pw_uid;
1295 cfg_gid = pwd->pw_gid;
1304 * Calculate string length of full pathname in original filesys
1305 * @param fname: the path name to convert.
1306 * Must not be null or empty.
1307 * @param cfg: config struct for chroot and chdir (if set).
1308 * @param use_chdir: if false, only chroot is applied.
1309 * @return length of string.
1310 * remember to allocate one more for 0 at end in mallocs.
1313 strlen_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
1317 if(cfg->chrootdir && cfg->chrootdir[0] &&
1318 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
1319 /* already full pathname, return it */
1320 return strlen(fname);
1323 if(cfg->chrootdir && cfg->chrootdir[0]) {
1324 /* start with chrootdir */
1325 len += strlen(cfg->chrootdir);
1329 #ifdef UB_ON_WINDOWS
1330 if(fname[0] != 0 && fname[1] == ':') {
1331 /* full path, no chdir */
1334 if(fname[0] == '/' || !use_chdir) {
1335 /* full path, no chdir */
1336 } else if(cfg->directory && cfg->directory[0]) {
1338 if(slashit && cfg->directory[0] != '/')
1340 if(cfg->chrootdir && cfg->chrootdir[0] &&
1341 strncmp(cfg->chrootdir, cfg->directory,
1342 strlen(cfg->chrootdir)) == 0)
1343 len += strlen(cfg->directory)-strlen(cfg->chrootdir);
1344 else len += strlen(cfg->directory);
1348 if(slashit && fname[0] != '/')
1350 len += strlen(fname);
1355 fname_after_chroot(const char* fname, struct config_file* cfg, int use_chdir)
1357 size_t len = strlen_after_chroot(fname, cfg, use_chdir)+1;
1359 char* buf = (char*)malloc(len);
1363 /* is fname already in chroot ? */
1364 if(cfg->chrootdir && cfg->chrootdir[0] &&
1365 strncmp(cfg->chrootdir, fname, strlen(cfg->chrootdir)) == 0) {
1366 /* already full pathname, return it */
1367 (void)strlcpy(buf, fname, len);
1372 if(cfg->chrootdir && cfg->chrootdir[0]) {
1373 /* start with chrootdir */
1374 (void)strlcpy(buf, cfg->chrootdir, len);
1377 #ifdef UB_ON_WINDOWS
1378 if(fname[0] != 0 && fname[1] == ':') {
1379 /* full path, no chdir */
1383 if(fname[0] == '/' || !use_chdir) {
1384 /* full path, no chdir */
1385 } else if(cfg->directory && cfg->directory[0]) {
1387 if(slashit && cfg->directory[0] != '/')
1388 (void)strlcat(buf, "/", len);
1389 /* is the directory already in the chroot? */
1390 if(cfg->chrootdir && cfg->chrootdir[0] &&
1391 strncmp(cfg->chrootdir, cfg->directory,
1392 strlen(cfg->chrootdir)) == 0)
1393 (void)strlcat(buf, cfg->directory+strlen(cfg->chrootdir),
1395 else (void)strlcat(buf, cfg->directory, len);
1399 if(slashit && fname[0] != '/')
1400 (void)strlcat(buf, "/", len);
1401 (void)strlcat(buf, fname, len);
1406 /** return next space character in string */
1407 static char* next_space_pos(const char* str)
1409 char* sp = strchr(str, ' ');
1410 char* tab = strchr(str, '\t');
1415 return (sp<tab)?sp:tab;
1418 /** return last space character in string */
1419 static char* last_space_pos(const char* str)
1421 char* sp = strrchr(str, ' ');
1422 char* tab = strrchr(str, '\t');
1427 return (sp>tab)?sp:tab;
1431 cfg_parse_local_zone(struct config_file* cfg, const char* val)
1433 const char *type, *name_end, *name;
1436 /* parse it as: [zone_name] [between stuff] [zone_type] */
1438 while(*name && isspace((unsigned char)*name))
1441 log_err("syntax error: too short: %s", val);
1444 name_end = next_space_pos(name);
1445 if(!name_end || !*name_end) {
1446 log_err("syntax error: expected zone type: %s", val);
1449 if (name_end - name > 255) {
1450 log_err("syntax error: bad zone name: %s", val);
1453 (void)strlcpy(buf, name, sizeof(buf));
1454 buf[name_end-name] = '\0';
1456 type = last_space_pos(name_end);
1457 while(type && *type && isspace((unsigned char)*type))
1459 if(!type || !*type) {
1460 log_err("syntax error: expected zone type: %s", val);
1464 if(strcmp(type, "nodefault")==0) {
1465 return cfg_strlist_insert(&cfg->local_zones_nodefault,
1468 return cfg_str2list_insert(&cfg->local_zones, strdup(buf),
1473 char* cfg_ptr_reverse(char* str)
1479 struct sockaddr_storage addr;
1482 /* parse it as: [IP] [between stuff] [name] */
1484 while(*ip && isspace((unsigned char)*ip))
1487 log_err("syntax error: too short: %s", str);
1490 ip_end = next_space_pos(ip);
1491 if(!ip_end || !*ip_end) {
1492 log_err("syntax error: expected name: %s", str);
1496 name = last_space_pos(ip_end);
1497 if(!name || !*name) {
1498 log_err("syntax error: expected name: %s", str);
1502 sscanf(ip, "%100s", buf);
1503 buf[sizeof(buf)-1]=0;
1505 if(!ipstrtoaddr(buf, UNBOUND_DNS_PORT, &addr, &addrlen)) {
1506 log_err("syntax error: cannot parse address: %s", str);
1511 * ddd.ddd.ddd.ddd.in-addr-arpa.
1512 * IPv6: (h.){32}.ip6.arpa. */
1514 if(addr_is_ip6(&addr, addrlen)) {
1516 const char* hex = "0123456789abcdef";
1519 memmove(ad, &((struct sockaddr_in6*)&addr)->sin6_addr,
1521 for(i=15; i>=0; i--) {
1523 *p++ = hex[ (b&0x0f) ];
1525 *p++ = hex[ (b&0xf0) >> 4 ];
1528 snprintf(buf+16*4, sizeof(buf)-16*4, "ip6.arpa. ");
1531 memmove(ad, &((struct sockaddr_in*)&addr)->sin_addr,
1533 snprintf(buf, sizeof(buf), "%u.%u.%u.%u.in-addr.arpa. ",
1534 (unsigned)ad[3], (unsigned)ad[2],
1535 (unsigned)ad[1], (unsigned)ad[0]);
1538 /* printed the reverse address, now the between goop and name on end */
1539 while(*ip_end && isspace((unsigned char)*ip_end))
1542 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), "%.*s",
1543 (int)(name-ip_end), ip_end);
1545 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf), " PTR %s", name);
1547 result = strdup(buf);
1549 log_err("out of memory parsing %s", str);
1555 #ifdef UB_ON_WINDOWS
1557 w_lookup_reg_str(const char* key, const char* name)
1562 DWORD len = (DWORD)sizeof(buf);
1564 char* result = NULL;
1565 ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_READ, &hk);
1566 if(ret == ERROR_FILE_NOT_FOUND)
1567 return NULL; /* key does not exist */
1568 else if(ret != ERROR_SUCCESS) {
1569 log_err("RegOpenKeyEx failed");
1572 ret = RegQueryValueEx(hk, (LPCTSTR)name, 0, &type, buf, &len);
1574 log_err("RegCloseKey");
1575 if(ret == ERROR_FILE_NOT_FOUND)
1576 return NULL; /* name does not exist */
1577 else if(ret != ERROR_SUCCESS) {
1578 log_err("RegQueryValueEx failed");
1581 if(type == REG_SZ || type == REG_MULTI_SZ || type == REG_EXPAND_SZ) {
1582 buf[sizeof(buf)-1] = 0;
1583 buf[sizeof(buf)-2] = 0; /* for multi_sz */
1584 result = strdup((char*)buf);
1585 if(!result) log_err("out of memory");
1590 void w_config_adjust_directory(struct config_file* cfg)
1592 if(cfg->directory && cfg->directory[0]) {
1593 TCHAR dirbuf[2*MAX_PATH+4];
1594 if(strcmp(cfg->directory, "%EXECUTABLE%") == 0) {
1595 /* get executable path, and if that contains
1596 * directories, snip off the filename part */
1598 if(!GetModuleFileName(NULL, dirbuf, MAX_PATH))
1599 log_err("could not GetModuleFileName");
1600 if(strrchr(dirbuf, '\\')) {
1601 (strrchr(dirbuf, '\\'))[0] = 0;
1602 } else log_err("GetModuleFileName had no path");
1604 /* adjust directory for later lookups to work*/
1605 free(cfg->directory);
1606 cfg->directory = memdup(dirbuf, strlen(dirbuf)+1);
1611 #endif /* UB_ON_WINDOWS */
1613 void errinf(struct module_qstate* qstate, const char* str)
1615 struct config_strlist* p;
1616 if(qstate->env->cfg->val_log_level < 2 || !str)
1618 p = (struct config_strlist*)regional_alloc(qstate->region, sizeof(*p));
1620 log_err("malloc failure in validator-error-info string");
1624 p->str = regional_strdup(qstate->region, str);
1626 log_err("malloc failure in validator-error-info string");
1630 if(qstate->errinf) {
1631 struct config_strlist* q = qstate->errinf;
1635 } else qstate->errinf = p;
1638 void errinf_origin(struct module_qstate* qstate, struct sock_list *origin)
1640 struct sock_list* p;
1641 if(qstate->env->cfg->val_log_level < 2)
1643 for(p=origin; p; p=p->next) {
1646 snprintf(buf, sizeof(buf), "from ");
1647 else snprintf(buf, sizeof(buf), "and ");
1649 snprintf(buf+strlen(buf), sizeof(buf)-strlen(buf),
1652 addr_to_str(&p->addr, p->len, buf+strlen(buf),
1653 sizeof(buf)-strlen(buf));
1654 errinf(qstate, buf);
1658 char* errinf_to_str(struct module_qstate* qstate)
1662 size_t left = sizeof(buf);
1663 struct config_strlist* s;
1664 char dname[LDNS_MAX_DOMAINLEN+1];
1666 sldns_wire2str_type_buf(qstate->qinfo.qtype, t, sizeof(t));
1667 sldns_wire2str_class_buf(qstate->qinfo.qclass, c, sizeof(c));
1668 dname_str(qstate->qinfo.qname, dname);
1669 snprintf(p, left, "validation failure <%s %s %s>:", dname, t, c);
1670 left -= strlen(p); p += strlen(p);
1672 snprintf(p, left, " misc failure");
1673 else for(s=qstate->errinf; s; s=s->next) {
1674 snprintf(p, left, " %s", s->str);
1675 left -= strlen(p); p += strlen(p);
1679 log_err("malloc failure in errinf_to_str");
1683 void errinf_rrset(struct module_qstate* qstate, struct ub_packed_rrset_key *rr)
1686 char dname[LDNS_MAX_DOMAINLEN+1];
1688 if(qstate->env->cfg->val_log_level < 2 || !rr)
1690 sldns_wire2str_type_buf(ntohs(rr->rk.type), t, sizeof(t));
1691 sldns_wire2str_class_buf(ntohs(rr->rk.rrset_class), c, sizeof(c));
1692 dname_str(rr->rk.dname, dname);
1693 snprintf(buf, sizeof(buf), "for <%s %s %s>", dname, t, c);
1694 errinf(qstate, buf);
1697 void errinf_dname(struct module_qstate* qstate, const char* str, uint8_t* dname)
1700 char buf[LDNS_MAX_DOMAINLEN+1];
1701 if(qstate->env->cfg->val_log_level < 2 || !str || !dname)
1703 dname_str(dname, buf);
1704 snprintf(b, sizeof(b), "%s %s", str, buf);